Method for controlling the operating characteristics of a hybrid electric vehicle

  • US 6,847,189 B2
  • Filed: 06/24/2003
  • Issued: 01/25/2005
  • Est. Priority Date: 05/31/1995
  • Status: Expired due to Fees
First Claim
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1. In a hybrid electric vehicle having a internal combustion engine, an electric motor, and a battery system and controller for powering the electric motor, the improvement comprising:

  • providing a transmission between said electric motor and a set of wheels in said vehicle; and

    controlling interaction between the internal combustion engine, the electric motor and the transmission to regenerate energy into the battery system only if engine fuel efficiency during regeneration and during subsequent power production from the electric motor is greater than engine fuel efficiency resulting from throttling the engine to reduce engine/motor power.

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