Range shifting of an automatic transmission
AssigneeFord Global Technologies, LLC
InventorsRam Krishnaswami, Matthew L. Fyie, Todd C. Spaulding, William R. Goodwin
Life of this patent
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Abstract
A system for shifting a transmission range includes a selector producing a signal representing a selected range, and the system has a primary state wherein a source of electric power shifts the transmission to the selected range in response to the signal, and a secondary state wherein a source of mechanical energy shifts the transmission to a Park range when the primary state is unable to shift the range.
Claims24
A system for shifting a transmission range, comprising:
- a selector producing a signal representing a selected range;
- a source of electric energy that linearly displaces a first actuator to the selected range in response to the signal, and a second actuator that releases a source of mechanical energy for linear displacement to a Park range and;
- first and second sensors producing signals representing a position of the first and second actuators, respectively.
A system for shifting a transmission range, comprising:
- a selector producing a signal representing a selected range;
- a motor;
- a source of mechanical energy;
- an actuator having a primary state enabled by the motor to shift the transmission to the selected range in response to the signal, and a secondary state enabled by the mechanical energy source to shift the transmission to a Park range when the primary state is unable to shift the range;
- and
- first and second sensors producing signals representing a position of first and second sleeves, respectively, of the actuator.
A system for shifting a transmission range, comprising:
- a selector producing a signal representing a selected range;
- a motor;
- a first sleeve releasably connected to the motor and containing a spring
- a second sleeve alternately engaged with and disengaged from the first sleeve by a solenoid;
- an actuator having a primary state enabled by the motor to shift the transmission to the selected range in response to the signal, and a secondary state enabled by a mechanical energy source to shift the transmission to a Park range when the primary state is unable to shift the range;
- and
- first and second sensors producing signals representing a position of the first and second sleeves, respectively.
Dependencies are inferred from the claim text.