Patent ID: 6827167
Filing Date: 2004-12-07
Classification: B60K,B60L,B60W,Y02T,Y10S,Y10T

Abstract:
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.