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Hybrid electric vehicle torque distribution

  • US 6,827,167 B2
  • Filed: 03/28/2002
  • Issued: 12/07/2004
  • Est. Priority Date: 03/28/2002
  • Status: Expired due to Term
First Claim
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1. A method of powering a hybrid electric vehicle with an electric motor and an internal combustion engine wherein in normal operation said vehicle is powered solely by said electric motor at start up to a first vehicle operational parameter level, and thereafter said electric motor does not power said vehicle until a torque demand for said vehicle is beyond a predefined percentage of a maximum internal combustion engine torsional output, said method comprising:

  • powering said vehicle by an electric motor up to said first vehicle operational parameter level;

    powering said vehicle with an internal combustion engine beyond said first vehicle operational parameter level;

    determining a torque level of said motor at said first vehicle operational parameter level;

    determining an accelerator pedal travel first position at said first vehicle operational parameter level;

    fixing a predefined percentage of a maximum engine torsional output to a predefined accelerator pedal travel second position; and

    scaling said accelerator pedal travel by a first predefined functional relationship from said accelerator pedal travel first position to said accelerator pedal travel second position.

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