Hybrid vehicle drive system adapted to prevent concurrent mode change and transmission shifting or torque distribution ratio change

A hybrid drive system for a motor vehicle, comprising:

• a drive power source including an engine operated by combustion of a fuel, and an electric motor operated with an electric energy, at least one of said engine and said electric motor being operated for driving the motor vehicle in a plurality of operation modes;
• an automatic transmission which is disposed between said drive power source and a drive wheel of the motor vehicle and whose speed ratio is variable;
• mode selecting means for selecting one of said plurality of operation modes, according to a predetermined mode selecting pattern;
• shift control means for controlling said automatic transmission to change a speed ratio thereof, according to a predetermined shifting pattern;
• and
• shifting restricting means for restricting a change of the speed ratio of the automatic transmission when the operation mode is changed by said mode selecting means.

A hybrid drive system for a motor vehicle, comprising:

• a drive power source including an engine operated by combustion of a fuel, and an electric motor operated with an electric energy, at least one of said engine and said electric motor being operated for driving the motor vehicle in a plurality of operation modes;
• an automatic transmission which is disposed between said drive power source and a drive wheel of the motor vehicle and whose speed ratio is variable;
• mode selecting means for selecting one of said plurality of operation modes, according to a predetermined mode selecting pattern, said mode selecting pattern including a mode selecting boundary line used by said mode selecting means for determining whether the operation mode should be changed between one and another of said plurality of operation modes;
• shift control means for controlling said automatic transmission to change a speed ratio thereof, according to a predetermined shifting pattern;
• and
• memory means for storing data representative of said predetermined shifting pattern, said predetermined shifting pattern including at least one first shift boundary line used by said shift control means for determining whether the speed ratio of said automatic transmission should be changed in said one of said plurality of operation modes, and at least one second shift boundary line used by said shift control means for determining whether the speed ratio of said automatic transmission should be changed in said another of said plurality of operation modes, said at least one first shift boundary line and said at least one second shift boundary line being continuous with each other, at said mode selecting boundary line.

A hybrid drive system for a motor vehicle, comprising:

• a drive power source including an engine operated by combustion of a fuel, and an electric motor operated with an electric energy, at least one of said engine and said electric motor being operated for driving the motor vehicle in a plurality of operation modes;
• a torque distributing mechanism disposed between said drive power source and front and rear drive wheels of the motor vehicle, for distributing a torque to said front and rear drive wheels;
• mode selecting means for selecting one of said plurality of operation modes, according to a predetermined mode selecting pattern;
• torque distribution ratio changing means for controlling said torque distributing mechanism to change a ratio of distribution of the torque to said front and rear drive wheels, according to a predetermined torque distributing pattern;
• and
• mode change restricting means for restricting a change of the operation mode of the motor vehicle by said mode selecting means when the ratio of distribution of said torque is changed by said torque distribution ratio changing means.

A hybrid drive system for a motor vehicle, comprising:

• a drive power source including an engine operated by combustion of a fuel, and an electric motor operated with an electric energy, at least one of said engine and said electric motor being operated for driving the motor vehicle in a plurality of operation modes;
• a torque distributing mechanism disposed between said drive power source and front and rear drive wheels of the motor vehicle, for distributing a torque to said front and rear drive wheels;
• mode selecting means for selecting one of said plurality of operation modes, according to a predetermined mode selecting pattern;
• torque distribution ratio changing means for controlling said torque distributing mechanism to change a ratio of distribution of the torque to said front and rear drive wheels, according to a predetermined torque distributing pattern;
• and
• torque distribution ratio change restricting means for restricting a change of said ratio of distribution of said torque by said torque distribution ratio changing means when the operation mode is changed by said mode selecting means.

A hybrid drive system for a motor vehicle, comprising:

• a drive power source including an engine operated by combustion of a fuel, and an electric motor operated with an electric energy, at least one of said engine and said electric motor being operated for driving the motor vehicle in a plurality of operation modes;
• mode selecting means for selecting one of said plurality of operation modes, according to a predetermined mode selecting pattern;
• a power transmitting device disposed between said drive power source and a drive wheel of the motor vehicle, said power transmitting device having a non-drive state and a drive state;
• manually operated transmission switching means for switching said power transmitting device between said non-drive and non-drive states;
• and
• mode change restricting means for restricting a change of the operation mode of the motor vehicle by said mode selecting means when the power transmitting device is switched from said non-drive state to said drive state, by said manually operated transmission s witching means.

A hybrid drive system for a motor vehicle, comprising:

• a drive power source including an engine operated by combustion of a fuel, and an electric motor operated with an electric energy, at least one of said engine and said electric motor being operated for driving the motor vehicle in a plurality of operation modes;
• mode selecting means for selecting one of said plurality of operation modes, according to a predetermined mode selecting pattern;
• a power transmitting device disposed between said drive power source and a drive wheel of the motor vehicle, said power transmitting device having a non-drive state and a drive state;
• manually operated transmission switching means for switching said power transmitting device between said non-drive and non-drive states;
• and
• input cutting means for cutting a power transfer from said drive power source to said power transmitting device when the power transmitting device is switched from said non-drive state to said drive state by said manually operated transmission switching means.

A hybrid drive system for a motor vehicle, comprising:

• a drive power source including an engine operated by combustion of a fuel, and an electric motor operated with an electric energy, at least one of said engine and said electric motor being operated for driving the motor vehicle in a plurality of operation modes;
• mode selecting means for selecting one of said plurality of operation modes, according to a predetermined mode selecting pattern;
• a power transmitting device disposed between said drive power source and a drive wheel of the motor vehicle, said power transmitting device having a non-drive state and a drive state;
• manually operated transmission switching means for switching said power transmitting device between said non-drive and non-drive states;
• and
• output control means for holding an output of said drive power source substantially constant while the power transmitting device is switched from said non-drive state to said drive state by said manually operated transmission switching means.