Electrical control system for control of an automatic transmission apparatus

An electrical control apparatus for control of an automatic transmission apparatus in a motor vehicle having a plurality of transmission states including a motor adapted for clockwise and counter-clockwise motion for control of the transmission state, the electrical control apparatus comprising:

• an operator input means for generating a desired transmission state signal corresponding to manual operator input;
• a transmission state sensing means for generating a present transmission state signal indicative of the state of the automatic transmission;
• and
• a speed sensing means for generating at least one vehicle speed signal indicative of the speed of the motor vehicle;
• a logic control unit connected to said operator input means and said transmission state sensing means for determining if said desired transmission state differs from said present transmission state signal, and
• for determining whether the desired transmission state is clockwise or counter-clockwise of the present transmission state, and for generating a clockwise motor drive signal if the desired transmission state is clockwise from the present transmission state and a counter-clockwise motor drive signal if the desired transmission state is counter-clockwise of the present transmission state, when said desired transmission state signal differs from said present transmission state signal,
• said logic control unit including a shift inhibition means for inhibiting control of the motor for either clockwise motion or counter-clockwise motion when said at least one vehicle speed signal indicates a motor vehicle speed greater than a predetermined motor vehicle speed corresponding to said desired transmission state, at least two transmission states having corresponding predetermined speeds which differ;
• and
• a motor drive means connected to said logic control unit and adapted for connection to the motor for controlling the motor for clockwise motion in response to said clockwise motor drive signal and for counter-clockwise motion in response to said counter-clockwise motor drive signal.

Electrical control apparatus for control of an automatic transmission apparatus in a motor vehicle having an operator's door, an operator's seat, and a plurality of transmission states including the transmission state of park, including electrical power means for change of the transmission state, said electrical control apparatus comprising:

• an operator input means for generating a desired transmission state signal corresponding to manual operator input;
• a transmission state sensing means for generating a present transmission state signal indicative of the state of the automatic transmission apparatus;
• an ignition sensing means of determining when the motor vehicle is switched on;
• a door sensing means for generating a door signal indicating the operator's door of the motor vehicle is closed;
• a seating sensing means for generating a seat signal indicating the operator's seat is occupied;
• and
• a logic control unit connected to the electric power means, said operator input means and said transmission state sensing means, said door sensing means, said seat sensing means and said ignition sensing means
• for determining if said desired transmission state differs from said present transmission state signal,
• for controlling the electric power means to shift the transmission to the transmission state as indicated by said desired transmission state if said desired transmission state signal differs from said present transmission state signal,
• for controlling the electric power means to shift the transmission to the transmission tate of park if said ignition sensing means determines the motor vehicle is not switched on, said door signal is not received and said seat signal is not received.

An electrical control apparatus for control of an automatic transmission apparatus in a motor vehicle having a plurality of transmission states including a motor adapted for upshifts and downshifts, the electrical control apparatus comprising:

• an operator input means for generating a desired transmission state signal corresponding to manual operator input;
• a transmission state sensing means for generating a present transmission state signal indicative of the state of the automatic transmission;
• and
• a logic control unit connected to the motor, said operator input means and said transmission state sensing means
• for determining if said desired transmission state differs from said present transmission state signal, and
• for determining whether the desired transmission state is an upshift or a downshift from the present transmission state, and for controlling the motor to upshift if the desired transmission state is an upshift from the present transmission state and to downshift if the desired transmission state is a downshift from the present transmission state, when said desired transmission state signal differs from said present transmission state signal,
• said logic control unit including a motor drive circuit for applying electric power to the motor in a first polarity for control of an upshift and in a second opposite polarity for control of a downshift;
• said motor drive circuit including:
• a first switch device connected between a first dc voltage source and a first terminal of the motor,
• a second switch device connected between a second dc voltage source having a differing voltage than said first dc voltage source and the first terminal of the motor,
• a third switch device connected between said first dc voltage source and a second terminal of the motor,
• a fourth switch device connected between the second terminal of the motor and said second dc voltage source, and
• a control means connected to said first, second, third and fourth switch device for causing said first and fourth switch devices to be conductive thereby applying dc power to the motor in a first polarity for control of an upshift, for causing said second and third switch devices to be conductive thereby applying dc power to the motor in a second opposite polarity for control of a downshift, and for causing said second and fourth switch devices to be conductive for dynamically breaking the motor when neither an upshift nor a downshift is desired.

An electrical control apparatus for control of an automatic transmission apparatus in a motor vehicle having a plurality of transmission states including a motor adapted for upshifts and downshifts, the motor having an angular range for each transmission state and an exact center for each transmission state, the electrical control apparatus comprising:

• an operator input means for generating a desired transmission state signal corresponding to manual operator input;
• transmission state sensing means for generating a present transmission state signal indicative of the state of the automatic transmission including a shaft encoder connected to sense the rotary position of the motor, said shaft encoder generating a plurality of signals indicating when the rotary position of the motor is in the angular range of the corresponding transmission state and a further signal indicating when the rotary position of the motor is in the exact center of the corresponding transmission state;
• and
• a logic control unit connected to the motor, said operator input means and said transmission state sensing means
• for determining if said desired transmission state differs from said present transmission system signal, and
• for determining whether the desired transmission state is an upshift or a downshift from the present transmission state,
• for controlling the motor to upshift if the desired transmission state is an upshift from the present transmission state and to downshift if the desired transmission state is a downshift from the present transmission state, when said desired transmission state signal differs from said present transmission state signal, and
• for stopping the motor when said plurality of signals of said shaft encoder indicates said angular range of said desired transmission state and said further signal of said shaft encoder indicates the exact center of said desired transmission state.

An electrical control apparatus for control of an automatic transmission apparatus in a motor vehicle having a plurality of transmission states including a motor adapted for clockwise and counter-clockwise motion for control of the transmission state, the electrical control apparatus comprising:

• an operator input means for generating a desired transmission state signal corresponding to manual operator input;
• a transmission state sensing means for generating a present transmission state signal indicative of the state of the automatic transmission;
• a logic control unit connected to said operator input means and said transmission state sensing means for determining if said desired transmission state differs from said present transmission state signal, and
• for determining whether the desired transmission state is clockwise or counter-clockwise to the present transmission state, and for generating a clockwise motor drive signal if the desired transmission state is clockwise from the present transmission state and a counter-clockwise motor drive signal if the desired transmission state is counter-clockwise of the present transmission state, when said desired transmission state signal differs from said present transmission state signal;
• a motor drive means connected to said logic control unit and adapted for connection to the motor for controlling the motor for clockwise motion in response to said clockwise motor drive signal and for counter-clockwise motion in response to said counter-clockwise motor drive signal;
• and
• a vehicle condition sensing means for generating a plurality of vehicle condition signals, each vehicle condition signal corresponding to an operational condition of the motor vehicle;
• said logical control unit including a shift inhibition means for inhibiting a generation of either said clockwise motor control signal or said counter-clockwise motor control signal when said desired transmission state signal and said vehicle condition signals correspond to one of a set of unsafe circumstances;
• said vehicle condition means including a speed sensing means for generating at least one vehicle speed signal indicative of the speed of the motor vehicle;
• said shift inhibition means inhibiting the generation of either said clockwise motor control signal or said counter-clockwise motor control signal when said at least one vehicle speed signal indicates a motor vehicle speed greater than a predetermined motor vehicle speed corresponding to said desired transmission state signal;
• said automatic transmission apparatus including the transmission states of park, reverse, low1 and low2;
• said speed sensing means generates a first vehicle speed signal when the speed of the motor vehicle exceeds a first predetermined speed, a second speed signal when the speed of the motor vehicle exceeds a second predetermined speed greater than said first predetermined speed, a third speed signal when the speed of the motor vehicle exceeds a third predetermined speed greater than said second predetermined speed, and a fourth speed signal when the speed of the motor vehicle exceeds a fourth predetermined speed greater than said third predetermined speed;
• said shift inhibition means inhibits the generation of either said clockwise motor control signal or said counter-clockwise motor control signal when
• said first vehicle speed signal is received and said desired transmission state signal corresponds to the park transmission state,
• said second vehicle speed signal is received and said desired transmission state signal corresponds to the reverse transmission state, said third vehicle speed signal is received and said desired transmission state signal corresponds to the low1 transmission state, and
• said fourth vehicle speed signal is received and said desired transmission state signal correspons to the low2 transmission state.

An electrical control apparatus for control of an automatic transmission apparatus in a motor vehicle having a plurality of transmission states including a motor adapted for clockwise and counter-clockwise motion for control of the transmission state, the electrical control apparatus comprising:

• an operator input means for generating a desired transmission state signal corresponding to manual operator input;
• a transmission state sensing means for generating a present transmission state signal indicative of the state of the automatic transmission;
• a logic control unit connected to said operator input means and said transmission state sensing means for determining if said desired transmission state differs from said present transmission state signal, and
• for determining whether the desired transmission state is clockwise or counter-clockwise of the present transmission state, and for generating a clockwise motor drive signal if the desired transmission state is clockwise from the present transmission state and a counter-clockwise motor drive signal if the desired transmission state is counter-clockwise of the present transmission state, when said desired transmission state signal differs from said present transmission state signal;
• a motor drive means connected to said logic control unit and adapted for connection to the motor for controlling the motor for clockwise motion in response to said clockwise motor drive signal and for counter-clockwise motion in response to said counter-clockwise motor drive signal;
• and
• the vehicle condition sensing means for generating a plurality of vehicle condition signals each vehicle condition signal corresponding to an operational condition of the motor vehicle;
• said logic control unit including a shift inhibition means for inhibiting the generation of either said clockwise motor control signal or said counter-clockwise motor control signal when said desired transmission state signal and said vehicle condition signals correspond to one of a set of unsafe circumstances;
• said vehicle condition sensing means including ignition sensing means for determing when the motor vehicle is switched on and a drive seat sensor when the driver seat is occupied;
• and
• said shift inhibition means of said logic control unit inhibiting the generation of either said clockwise motor control signal or said counter-clockwise motor control signal when the motor vehicle is switched on and the driver's seat is not occupied.

An electrical control apparatus for control of an automatic transmission apparatus in a motor vehicle having a plurality of transmission states including a motor adapted for clockwise and counter-clockwise motion for control of the transmission state, the electrical control apparatus comprising:

• an operator input means for generating a desired transmission state signal corresponding to manual operator input;
• a transmission state sensing means for generating a present transmission state signal indicative of the state of the automatic transmission;
• a logic control unit connected to said operator input means and said transmission state sensing means for determining if said desired transmission state differs from said present transmission state signal, and
• for determining whether the desired transmission state is clockwise or counter-clockwise of the present transmission state, and for generating a clockwise motor drive signal if the desired transmission state is clockwise from the present transmission state and a counter-clockwise motor drive signal if the desired transmission state is counter-clockwise of the present transmission state, when said desired transmission state signal differs from said present transmission state signal;
• a motor drive means connected to said logic control unit and adapted for connection to the motor for controlling the motor for clockwise motion in response to said clockwise motor drive signal and for counter-clockwise motion in response to said counter-clockwise motor drive signal;
• and
• a vehicle condition sensing means for generating a plurality of vehicle condition signals, each vehicle condition signal corresponding to an operational condition of the motor vehicle;
• said logic control unit including a shift inhibition means for inhibiting the generation of either said clockwise motor control signal or said counter-clockwise motor control signal when said desired transmission state signal and said vehicle condition signals correspond to one of a set of unsafe conditions;
• said automatic transmission including the transmission state of park;
• said vehicle condition sensing means including ignition sensing means for determining when the motor vehicle is switched on, a driver's door sensor for determining when the driver's door is open and a driver's seat sensor for detecting when the driver's seat is occupied;
• and
• said logic control unit further including park shift means for generation of one of either said clockwise motor control signal or said counter-clockwise motor control signal for changing the transmission state to park when the motor vehicle is switched on the driver's door is open and the driver's seat is not occupied.

An electrical control apparatus for control of an automatic transmission apparatus in a motor vehicle having a plurality of transmission states including a motor adapted for clockwise and counter-clockwise motion for control of the transmission state, the electrical control apparatus comprising:

• an operator input means for generating a desired transmission state signal corresponding to manual operator input;
• a transmission state sensing means for generating a present transmission state signal indicative of the state of the automatic transmission;
• a logic control unit connected to said operator input means and said transmission state sensing means for determining if said desired transmission state differs from said present transmission state signal, and
• for determining whether the desired transmission state is clockwise or counter-clockwise of the present transmission state, and for generating a clockwise motor drive signal if the desired transmission state is clockwise from the present transmission state and a counter-clockwise motor drive signal if the desired transmission state is counter-clockwise of the present transmission state, when said desired transmission state signal differs from said present transmission state signal;
• and
• a motor drive means connected to said logic control unit and adapted for connection to the motor for controlling the motor for clockwise motion in response to said clockwise motor drive signal and for counter-clockwise motion in response to said counter-clockwise motor drive signal;
• said logic control unit including a timer means for inhibiting the generation of either said clockwise motor control signal or said counter-clockwise motor control signal if said desired transmission state signal differs from said present transmission state signal for more than a predetermined period of time.

An electrical control apparatus for control of an automatic transmission apparatus in a motor vehicle having a plurality of transmission states including a motor adapted for clockwise and counter-clockwise motion for control of the transmission state, the electrical control apparatus comprising:

• an operator input means for generating a desired transmission state signal corresponding to manual operator input;
• a transmission state sensing means for generating a present transmission state signal indicative of the state of the automatic transmission;
• a logic control unit connected to said operator input means and said transmission state sensing means for determining if said desired transmission state differs from said present transmission state signal, and
• for determining whether the desired transmission state is clockwise or counter-clockwise of the present transmission state, and for generating a clockwise motor drive signal if the desired transmission state is clockwise from the present transmission state and a counter-clockwise motor drive signal if the desired transmission state is counter-clockwise of the present transmission state, when said desired transmission state signal differs from said present transmission state signal;
• and
• a motor drive means connected to said logic control unit and adapted for connection to the motor for controlling the motor for clockwise motion in response to said clockwise motor drive signal and for counter-clockwise motion in response to said counter-clockwise motor drive signal;
• said motor driving means applying dc electric power to the motor in a first polarity in response to said clockwise motor control signal, applying dc electric power to the motor in a second polarity opposite to said first polarity in response to said counter-clockwise motor control signal, and dynamically breaking the motor when neither said clockwise motor control signal nor said counter-clockwise motor control signal is received.

An electrical control apparatus for control of an automatic transmission apparatus in a motor vehicle having a plurality of transmission states including a motor adapted for clockwise and counter-clockwise motion for control of the transmission state, the electrical control apparatus comprising:

• an operator input means for generating a desired transmission state signal corresponding to manual operator input;
• a transmission state sensing means for generating a present transmission state signal indicative of the state of the automatic transmission;
• a logic control unit connected to said operator input means and said transmission state sensing means for determining if said desired transmission state differs from said present transmission state signal, and
• for determining whether the desired transmission state is clockwise or counter-clockwise of the present transmission state, and for generating a clockwise motor drive signal if the desired transmission state is clockwise from the present transmission state and a counter-clockwise motor drive signal if the desired transmission state is counter-clockwise of the present transmission state, when said desired transmission state signal differs from said present transmission state signal;
• and
• a motor drive means connected to said logic control unit and adapted for connection to the motor for controlling the motor for clockwise motion in response to said clockwise motor drive signal and for counter-clockwise motion in response to said counter-clockwise motor drive signal;
• said operator input means including a plurality of manual push-button switches whereby manual actuation of one of said push-button switches causes generation of the corresponding desired transmission state signal,
• said electrical control apparatus further including an indicator means connected to said transmission state sensing means including a plurality of transmission state indicators, each disposed adjacent to a corresponding push-button switch, said indicator means for actuation of one of said transmission state indicators corresponding to said transmission state signal.

An electrical control apparatus for control of an automatic transmission apparatus in a motor vehicle having a plurality of transmission states including a motor adapted for clockwise and counter-clockwise motion for control of the transmission state, the electrical control apparatus comprising:

• an operator input means for generating a desired transmission state signal corresponding to manual operator input;
• a transmission state sensing means for generating a present transmission state signal indicative of the state of the automatic transmission;
• a logic control unit connected to said operator input means and said transmission state sensing means for determining if said desired transmission state differs from said present transmission state signal, and
• for determining whether the desired transmission state is clockwise or counter-clockwise of the present transmission state, and for generating a clockwise motor drive signal if the desired transmission state is clockwise from the present transmission state and a counter-clockwise motor drive signal if the desired transmission state is counter-clockwise of the present transmission state, when said desired transmission state signal differs from said present transmission state signal;
• a motor drive means connected to said logic control unit and adapted for connection to the motor for controlling the motor for clockwise motion in response to said clockwise motor drive signal and for counter-clockwise motion in response to said counter-clockwise motor drive signal;
• and
• a manual control means connected to said motor drive means for selective generation of said clockwise motor control signal and said counter-clockwise motor control signal in response to manual inputs.

An electrical control apparatus for control of an automatic transmission apparatus in a motor vehicle having a plurality of transmission states including a motor adapted for clockwise and counter-clockwise motion for control of the transmission state, the electrical control apparatus comprising:

• an operator input means for generating a desired transmission state signal corresponding to manual operator input;
• a transmission state sensing means for generating a present transmission state signal indicative of the state of the automatic transmission;
• a logic control unit connected to said operator input means and said transmission state sensing means for determining if said desired transmission state differs from said present transmission state signal, and
• for determining whether the desired transmission state is clockwise or counter-clockwise of the present transmission state, and for generating a clockwise motor drive signal if the desired transmission state is clockwise from the present transmission state and a counter-clockwise motor drive signal if the desired transmission state is counter-clockwise of the present transmission state, when said desired transmission state signal differs from said present transmission state signal;
• a motor drive means connected to said logic control unit and adapted for connection to the motor for controlling the motor for clockwise motion in response to said clockwise motor drive signal and for counter-clockwise motion in response to said counter-clockwise motor drive signal;
• and
• the motor vehicle including an accelerator pedal, the automatic transmission including a down shift lever connected to a down shift solenoid for temporarily downshifting,
• said electrical control apparatus further comprising an accelerator pedal switch connected to the accelerator pedal for generating an accelerator depression signal upon full depression of the accelerator pedal,
• said logic control unit further including a down shift control means for generating a solenoid control signal for application to the solenoid upon receipt of said accelerator depression signal.

An electrical control apparatus for control of an automatic transmission apparatus in a motor vehicle having a plurality of transmission states including a motor adapted for clockwise and counter-clockwise motion for control of the transmission state, the motor having an angular range for each transmission state and an exact center for each transmission state, the electrical control apparatus comprising:

• an operator input means for generating a desired transmission state signal corresponding to manual operator input;
• a transmission state sensing means for generating a present transmission state signal indicative of the state of the automatic transmission including a shaft encoder connected to sense the rotary position of the motor, said shaft encoder generates a plurality of signals indicating when the rotary position of the motor is in the angular range of the corresponding transmission state and a further signal indicating when the rotary position of the motor is in the exact center of the corresponding transmission state;
• and
• a logic control unit connected to said operator input means and said transmission state sensing means for determining if said desired transmission state signal differs from said present transmission state signal, and
• for determining whether the desired transmission state is clockwise or counter-clockwise of the present transmission state, and generating a clockwise motor drive signal if the desired transmission state is clockwise of the present transmission state and to generate a counter-clockwise motor drive signal if the desired transmission state is counter-clockwise of the present transmission state, when said desired transmission state signal differs from said present transmission state signal, and said logic control unit stops the motor when said plurality of signals of said shaft encoder indicates said angular range of said desired transmission state and said further signal of said shaft encoder indicates the exact center of said desired transmission state.

An electrical control apparatus for control of an automatic transmission apparatus in a motor vehicle having a plurality of transmission states including a motor adapted for upshifts and downshifts, the electrical control apparatus comprising:

• an operator input means for generating a desired transmission state signal corresponding to manual operator input;
• a transmission state sensing means for generating a present transmission state signal indicative of the state of the automatic transmission;
• an indicator means connected to said transmission state sensing means for generating an operator perceivable indication of said transmission state signal;
• and
• a logic control unit connected to the motor, said operator input means and said transmission state sensing means
• for determining if the desired transmission state differs from the present transmission state signal,
• for determining whether the desired transmission state is an upshift or a downshift from the present transmission state, and
• for controlling the motor to upshift if the desired transmission state is an upshift from the present transmission state and to downshift if the desired transmission state is a downshift from the present transmission state, when the desired transmission state signal differs from the present transmission state signal.

An electrical control apparatus for control of an automatic transmission apparatus in a motor vehicle having a plurality of transmission states including a motor adapted for clockwise and counter-clockwise motion for control of the transmission state, the electrical control apparatus comprising:

• an operator input means for generating a desired transmission state signal corresponding to manual operator input;
• a transmission state sensing means for generating a present transmission state signal indicative of the state of the automatic transmission;
• an indicator means connected to said transmission state sensing means for generating an operator perceivable indication of said transmission state signal;
• and
• a logic control unit connected to said operator input means and said transmission state sensing means
• for determining if the desired transmission state differs from the present transmission state signal,
• for determining whether the desired transmission state is clockwise or counter-clockwise of the present transmission state, and
• for generating a clockwise motor drive signal if the desired transmission state is clockwise from the present transmission state and a counter-clockwise motor drive signal if the desired transmission state is counterclockwise from the present transmission state;
• and
• a motor drive means connected to said logic control unit and adapted for connection to the motor for controlling the motor for clockwise motion in response to said clockwise motor drive signal and for counter-clockwise motion in response to said counter-clockwise motor drive signal.

An electrical control apparatus for control of an automatic transmission apparatus in a motor vehicle having a plurality of transmission states including a motor adapted for upshifts and downshifts, the electrical control apparatus comprising:

• an operator input means for generating a desired transmission state signal corresponding to manual operator input;
• a transmission state sensing means for generating a present transmission state signal indicative of the state of the automatic transmission;
• a brake sensing means for generating a brake depress signal when the brake is depressed;
• and
• a logic control unit connected to the motor, said operator input means, and said transmission state sensing means
• for determining if said desired transmission state differs from said present transmission state signal,
• for determining whether the desired transmission state is an upshift or a downshift from the present transmission state,
• for controlling the motor to upshift if the desired transmission state is an upshift from the present transmission state and to downshift if the desired transmission state is a downshift from the present transmission state, when said desired transmission state signal differs from said present transmission state signal, and
• for inhibiting control of the motor for either an upshift or a downshift when said present transmission state signal indicates one of a predetermined set of at least one transmission state, and said brake signal depress signal is not received.

An electrical control apparatus for control of an automatic transmission apparatus in a motor vehicle having a plurality of transmission states including a motor adapted for clockwise and counter-clockwise motion for control of the transmission state, the electrical control apparatus comprising:

• an operator input means for generating a desired transmission state signal corresponding to manual operator input;
• a transmission state sensing means for generating a present transmission state signal indicative of the state of the automatic transmission;
• a brake sensing means for generating a brake depress signal when the brake is depressed;
• and
• a logic control unit connected to said operator input means and said transmission state sensing means
• for determining if said desired transmission state differs from said present transmission state signal,
• for determining whether the desired transmission state is clockwise or counter-clockwise of the present transmission state,
• for generating a clockwise motor drive signal if the desired transmission state is clockwise from the present transmission state and a counter-clockwise motor drive signal if the desired signal differs from said present transmission state signal, and
• for inhibiting generation of either said clockwise motor control signal or said counter-clockwise motor control signal when said present transmission state signal indicates one of a predetermined set of at least one transmission state, and said brake signal depress signal is not received;
• and
• a motor drive means connected to said logic control unit and adapted for connection to the motor for controlling the motor for clockwise motion in response to said clockwise motor drive signal and for counter-clockwise motion in response to said counter-clockwise motor drive signal.

An electric shift apparatus for use with a motor vehicle having an automatic transmission of the type including a mode select member to selectively shift a transmission between a plurality of shift positions, said apparatus comprising:

• a power module adapted to be mounted on the housing of the transmission proximate the mode select member and including an electric motor assembly having an output shaft adapted to be drivingly connected to the mode select member;
• a control module adapted to be mounted in the passenger compartment of a vehicle and including a plurality of mode select members, accessible to the vehicle operator and corresponding respectively to the transmission shift positions, and generator means operative in response to operator actuation of each mode select member to generate and operate a signal representative of the selected shift position;
• comparator means receiving said operator signals and encoder signals representative of the present shift position, operative in response to receipt of an operator signal differing from the received encoder signal to energize said motor assembly in a sense to move the transmission to a desired shift position corresponding to the operator signal, and operative in response to arrival of the transmission in the desired position to deenergize said motor assembly;
• means operative to generate a plurality of differing vehicle threshold speed signals corresponding respectively to a plurality of transmission shift positions;
• and
• means inhibiting energization of said motor assembly in a sense to move the transmission to a desired shift position when the vehicle threshold speed signal corresponding to the desired shift position is exceeded.

Electrical control apparatus for control of an automatic transmission apparatus in a motor vehicle having a plurality of transmission states including the transmission state of park, including electric power means adapted for change of the transmission state, said electrical control apparatus comprising:

• an operator input means for generating a desired transmission state signal corresponding to manual operator input;
• a transmission state sensing means for generating a present transmission state signal indicative of the state of the automatic transmission apparatus;
• a speed sensor means for indicating if the speed of the motor vehicle is less than a predetermined nonzero speed;
• an ignition sensing means for determining when the motor vehicle is switched on;
• and
• a logic control unit connected to the electric power means, said operator input means, said transmission state sensing means, said speed sensor means, and said ignition sensing means
• for determining if said desired transmission state signal differs from said present transmission state signal,
• for controlling the electric power means to shift the transmission to the transmission state as indicated by said desired transmission state signal if said desired transmission state signal differs from said present transmission state signal, and
• for controlling the electric power means to shift the transmission to the transmission state of park if said ignition sensing means determines the motor vehicle is not switched on and said speed sensor means indicates the speed of the motor vehicle is less than said predetermined nonzero speed.

Electrical control apparatus for control of an automatic transmission apparatus in a motor vehicle having a plurality of transmission states including the transmission state of park, including electrical power means for change of the transmission state, said electrical control apparatus comprising:

• an operator input means for generating a desired transmission state signal corresponding to manual operator input;
• a transmission state sensing means for generating a present transmission state signal indicative of the state of the automatic transmission apparatus;
• an indicator means connected to said transmission state sensing means for generating an operator perceivable indication of said present transmission state signal;
• an ignition sensing means for determining when the motor vehicle is switched on;
• and
• a logic control unit connected to the electric power means, said operator input means, said transmission state sensing means, and said ignition sensing means
• for determining if said desired transmission state differs from said present transmission state signal,
• for controlling the electric power means to shift the transmission to the transmission state as indicated by said desired transmission state if said desired transmission state signal differs from said present transmission state signal, and
• for controlling the electric power means to shift the transmission to the transmission state of park if said ignition sensing means determines the motor vehicle is not switched on, whereby said indicator means generates said operator perceivable indication when the transmission reaches the transmission state of park.

An electrical control apparatus for control of an automatic transmission apparatus in a motor vehicle having a plurality of transmission states including a motor adapted for changing the transmission state, the electrical control apparatus comprising:

• an operator input means for generating a desired transmission state signal corresponding to manual operator input;
• a transmission state sensing means for generating a present transmission state signal indicative of the state of the automatic transmission;
• an indicator means connected to said transmission state sensing means for generating an operator perceivable indication of said present transmission state signal;
• and
• a logic control unit connected to the motor, said operator input means, and said transmission state sensing means
• for determining if said desired transmission state signal differs from said present transmission state signal, and
• for controlling the motor to change the transmission state to the desired transmission state when said desired transmission state signal differs from said present transmission state signal, whereby said indicator means generates said operator perceivable indication when said present transmission state reaches said desired transmission state.

Electrical control apparatus for control of an automatic transmission apparatus in a motor vehicle having a plurality of transmission states including the transmission state of park, including electrical power means for change of the transmission state, said electrical control apparatus comprising:

• an operator input means for generating a desired transmission state signal corresponding to manual operator input;
• a transmission state sensing means for generating a present transmission state signal indicative of the state of the automatic transmission apparatus;
• an ignition sensing means for generating an ignition on signal when the motor vehicle is switched on;
• and
• a logic control unit connected to the electric power means, said operator input means and said transmission state sensing means, and said ignition sensing means, said logic control unit performing Boolean operations on said desired transmission state signal, said present transmission state signal and said ignition on signal
• for determining if said desired transmission state differs from said present transmission signal,
• for controlling the electric power means to shift the transmission to the transmission state as indicated by said desired transmission state if said desired transmission state signal differs from said present transmission state signal, and
• for controlling the electric power means to shift the transmission to the transmission state of park if said ignition sensing means determines the motor vehicle is not switched on.

An electrical control apparatus for control of an automatic transmission apparatus in a motor vehicle having a plurality of transmission states including the transmission state of park, the motor vehicle including a brake pedal for actuation of a motor vehicle brake system and including an electric power means adapted for change of the transmission state, said electrical control apparatus comprising:

• an operator input means for generating a desired transmission state signal corresponding to manual operator input;
• a transmission state sensing means for generating a present transmission state signal indicative of the state of the automatic transmission apparatus;
• a brake sensing means for generating a brake depress signal when the brake pedal is depressed;
• and
• a logic control unit connected to the electric power means, said operator input means, said transmission state sensing means, and said brake sensing means
• for determining if said desired transmission state signal differs from said present transmission state signal,
• for controlling the electric power means to shift the transmission to the transmission state indicated by said desired transmission state signal if said desired transmission state signal differs from said present transmission state signal, and
• for inhibiting control of the electric power means and precluding shifting of the transmission out of the state of park when said present transmission state signal indicates the automatic transmission apparatus is in the transmission state of park and said brake depress signal is not received.