Driving force distribution system for hybrid vehicles

A hybrid vehicle comprising:

• front and rear sets of wheels;
• an internal combustion engine for driving one set of said first and second sets of wheels;
• an electric motor for driving the other set of said first and second sets of wheels;
• a battery for supplying power to said electric motor;
• an accelerator opening sensor for detecting the degree of accelerator opening;
• a battery charge amount detector for detecting the amount of battery charge of said battery;
• travelling mode deciding means for selecting a travelling mode by comparing the detected degree of accelerator opening and the detected amount of battery charge with predetermined values for degree of accelerator opening and amount of battery charge provided as a map correlating said predetermined values with a plurality of travelling modes;
• throttle opening setting means for controlling the output of said engine by selecting an engine output distribution table corresponding to the selected travelling mode from among a plurality of engine output distribution tables providing predetermined values for throttle opening correlated with predetermined values for accelerator opening, for selecting a throttle opening value corresponding to the detected accelerator opening from said selected engine output distribution table and for setting the throttle opening in accordance with the selected throttle opening value;
• and
• motor output setting means for controlling the output of said motor by selecting a motor output distribution table corresponding to the selected travelling mode from among a plurality of motor output distribution tables providing predetermined motor output values correlated with predetermined values for accelerator opening, for selecting a motor output value corresponding to the detected accelerator opening from said selected motor output distribution table and for setting the motor output in accordance with the selected motor output value.