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Drag torque control method in a diesel electric drive system and drive system

  • US 5,954,779 A
  • Filed: 12/05/1997
  • Issued: 09/21/1999
  • Est. Priority Date: 12/06/1996
  • Status: Expired due to Term
First Claim
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1. A method to influence the drag torque in a drive train, comprising the steps of:

  • providing at least one electric motor for driving a driven wheel of a vehicle, an internal combustion engine, and an electric machine capable of mechanically coupling to said internal combustion engine and operating as a generator and as a motor, said electric motor capable of electric coupling to said electric machine, and an actuating member connected to an actuator of said internal combustion engine for presetting a driver'"'"'s desire for movement of vehicle;

    operating said electric machine as a generator on one of release of the actuating member and actuation of a system for presetting the driver'"'"'s desire for movement;

    generating a first output portion from said electric machine drawn by the electric motor from the driven wheel;

    feeding said first output portion to the electric machine for driving said internal combustion engine; and

    selecting said first output portion such that the internal combustion engine operates at least at a speed of rotation greater than or equal to an idling speed of rotation and on which the internal combustion fuel supply is interrupted completely by means of a control coordinated with said internal combustion engine.

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