Control method and apparatus for internal combustion engine electric hybrid vehicles

  • US 6,054,844 A
  • Filed: 04/21/1998
  • Issued: 04/25/2000
  • Est. Priority Date: 04/21/1998
  • Status: Expired due to Term
First Claim
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1. An apparatus for controlling the power at the output of an internal combustion engine, comprising:

  • (a) an electric motor coupled to the output of said engine; and

    (b) control means for maintaining the power output of said engine substantially along an ideal operating line for said engine as the speed of the engine varies, wherein said ideal operating line specifies engine power output as a function of engine speed, wherein said engine power output is maintained substantially along said ideal power output line by varying the torque output of said electric motor and thereby varying the power output of said engine.

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