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SYSTEM FOR DRIVING HYBRID VEHICLE, METHOD THEREOF AND ELECTRIC POWER SUPPLY SYSTEM THEREFOR

  • US 20020007975A1
  • Filed: 09/29/1999
  • Published: 01/24/2002
  • Est. Priority Date: 09/29/1998
  • Status: Active Grant
First Claim
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1. A system for driving a hybrid vehicle comprising an engine;

  • a motor/generator coupled to said engine;

    a battery connected to said motor/generator through an electric power converter; and

    a controller for controlling said engine and said motor/generator corresponding to driving condition of the vehicle, wherein said controller has a plurality of operating modes for controlling said engine and said motor/generator corresponding to an accelerator opening degree for operating said engine and a charge ratio of said battery, and said controller selects an engine running electric generating mode that said engine is operated as a driving source of said vehicle and said motor/generator and electric power generated by said motor/generator is recovered to said battery when the charge ratio is low;

    an acceleration mode that said engine and said motor/generator are operated as the driving source of the vehicle when the charge ratio of said battery is high and any one of said accelerator opening degree and a rate of change of said accelerator opening degree is large; and

    an engine running mode that only said engine is operated as the driving source of the vehicle when the charge ratio of said battery is high and said accelerator opening degree is small.

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