Hybrid vehicle drive force control device and control method

A hybrid vehicle drive force control device for controlling, according to a depression of an accelerator pedal, an output torque of an engine, an output torque of a motor which varies according to a supply current from a battery, and a speed ratio of a continuously variable transmission which is connected to said engine and said motor, comprising:

• means for detecting a depression amount of said accelerator pedal,
• means for detecting a vehicle speed,
• means for detecting an input rotation speed of said continuously variable transmission,
• means for detecting an output rotation speed of said continuously variable transmission,
• means for setting a target drive torque of said vehicle based on said depression amount of said accelerator pedal and said vehicle speed
• means for setting a target engine rotation speed based on said target drive torque,
• means for setting a target speed ratio based on said target engine rotation speed and said vehicle speed,
• means for calculating a real speed ratio of said continuously variable transmission from the input rotation speed and output rotation speed of said continuously variable transmission,
• means for setting a target combined torque of said engine and said motor based on said target drive torque and said real speed ratio,
• means for setting a target motor torque based on said target combined torque and said input rotation speed, and
• means for setting a target engine torque based on the difference of said target combined torque and said target motor torque,
• means for varying an output torque of said engine based on said target engine torque,
• means for varying said output torque of said motor based on said target motor torque, and
• means for varying a speed ratio of said continuously variable transmission based on said target speed ratio.

A hybrid vehicle drive force control method for controlling, according to a depression of an accelerator pedal, an output torque of an engine, an output torque of a motor which varies according to a supply current from a battery, and a speed ratio of a continuously variable transmission which is connected to said engine and said motor, comprising:

• detecting a depression amount of said accelerator pedal,
• detecting a vehicle speed,
• detecting an input rotation speed of said continuously variable transmission,
• detecting an output rotation speed of said continuously variable transmission,
• setting a target drive torque of said vehicle based on said depression amount of said accelerator pedal and said vehicle speed,
• setting a target engine rotation speed based on said target drive torque,
• setting a target speed ratio based on said target engine rotation speed and said vehicle speed,
• calculating a real speed ratio of said continuously variable transmission from the input rotation speed and output rotation speed of said continuously variable transmission,
• setting a target combined torque of said engine and said motor based on said target drive torque and said real speed ratio,
• setting a target motor torque based on said target combined torque and said input rotation speed,
• setting a target engine torque based on the difference of said target combined torque and said target motor torque,
• varying an output torque of said engine based on said target engine torque,
• varying said output torque of said motor based on sad target motor torque, and
• varying a speed ratio of said continuously variable transmission based on said target speed ratio.