Hybrid vehicle

Abstract

A hybrid vehicle is disclosed, in which the drive torque is controlled according to a target, and the engine operating point and the battery charging rate are controlled thereby as targeted to improve the fuel consumption rate of the hybrid vehicle as a whole An engine torque estimating unit estimates the engine torque based on the motor current, and an engine output correction unit.

What is claimed is:  
     
         1 . A hybrid vehicle comprising: 
 an engine for generating the energy for driving the vehicle;    a transmission for changing the engine speed and transmitting the driving force to the wheels;    at least a motor for increasing/decreasing the wheel driving force;    a battery for supplying power to said motor; and    a drive control unit for calculating and outputting an operation command for said engine and said motor based on the operation information including the accelerator angle;    wherein said drive control unit includes an engine output correction mechanism for correcting the operation command value for said engine and maintaining an optimum operating point of said engine.    
     
     
         2 . A hybrid vehicle comprising: 
 an engine for generating the energy for driving the vehicle;    a transmission for changing the engine speed and transmitting the driving force to the wheels;    a motor for increasing/decreasing the wheel driving force;    a battery for supplying power to said motor;    means for determining a target torque value of said engine;    means for calculating the engine torque generated by said engine; and    means for correcting the output of said engine based on the difference between the target value of the engine torque and the engine torque calculated by said engine torque calculation means.    
     
     
         3 . A hybrid vehicle according to    claim 1   , 
 wherein the torque generated by said engine is calculated based on the detected torque value of said motor or a toque command value.    
     
     
         4 . A hybrid vehicle according to    claim 2   , 
 wherein said torque generated by said engine is calculated based on the detected torque value of said motor or a torque command value.    
     
     
         5 . A hybrid vehicle comprising: 
 an engine for generating the energy for driving the vehicle;    a transmission for changing the engine speed and transmitting the driving force to the wheels;    a motor for increasing/decreasing the wheel driving force;    means for determining a target output value of said engine;    means for calculating the output generated by said engine; and    means for correcting the output of said engine based on the difference between the target engine output value and the engine output value calculated by said engine output calculation means, thereby maintaining an optimum operating point of said engine.