초록 ▼

In a hybrid vehicle wherein the rotation torque of a motor and engine are input to a continuously variable transmission, a target speed ratio is determined from a target engine rotation speed set based on a target drive torque of said vehicle and a vehicle speed. A target combined torque of the moto

In a hybrid vehicle wherein the rotation torque of a motor and engine are input to a continuously variable transmission, a target speed ratio is determined from a target engine rotation speed set based on a target drive torque of said vehicle and a vehicle speed. A target combined torque of the motor and engine is set based on the target drive torque and a real speed ratio of the transmission. A target motor torque is determined based on the target combined torque and the input rotation speed of the continuously variable transmission. A value obtained by subtracting the target motor torque from the target combined torque is set equal to a target engine torque. The drive force of the hybrid vehicle is optimized by controlling the engine, motor and continuously variable transmission by the target engine torque, target motor torque and target speed ratio thus obtained.

대표청구항 ▼

[ What is claimed is:] [1.] 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 variab

[ What is claimed is:] [1.] 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:a sensor for detecting a depression amount of said accelerator pedal,a sensor for detecting a vehicle speed,a sensor for detecting an input rotation speed of said continuously variable transmission,a sensor for detecting an output rotation speed of said continuously variable transmission,an engine controller for varying said output torque of said engine based on a target engine torque,a motor controller for varying said output torque of said motor based on a target motor torque,a speed ratio controller for varying said speed ratio of said continuously variable transmission based on a target speed ratio, anda microprocessor programmed to:set a target drive torque of said vehicle based on said depression amount of said accelerator pedal and said vehicle speed,set a target engine rotation speed based on said target drive torque,set said target speed ratio based on said target engine rotation speed and said vehicle speed,calculate a real speed ratio of said continuously variable transmission from the input rotation speed and output rotation speed of said continuously variable transmission,set a target combined torque of said engine and said motor based on said target drive torque and said real speed ratio,set said target motor torque based on said target combined torque and said input rotation speed, andset said target engine torque based on the difference of said target combined torque and said target motor torque.