Drag torque control method in a diesel electric drive system and drive system
First Claim
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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Accused Products
Abstract
A method for influencing the drive torque in a drive train comprising at least one electric motor at least indirectly driving one driven wheel, an internal combustion engine, and an electric machine allowing mechanical coupling to said engine operating a generator and a motor. Each selected motor allows electric coupling to the generator.
The system creates a device for presetting a driver'"'"'s desire for movement of the vehicle, coupled at least indirectly to an actuator of the internal combustion engine. According to the invention, the electric motors are operated as generators, at least upon release of the system for presetting a driver'"'"'s desire. Drawn from the driven wheels by the electric motors is a first output portion that is generated in generator mode and fed to the electric machine for driving the internal combustion engine. The first output portion is selected such that the internal combustion engine operates at least at a speed of rotation greater than or equal to idling speed of rotation and at which the fuel supply is interrupted completely by means of a control coordinated with the internal combustion engine.
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Citations
27 Claims
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1. A method to influence the drag torque in a drive train, comprising the steps of:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A drive unit for vehicle, said drive unit comprising:
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at least one electric motor driving at least one driven wheel; an internal combustion engine having an actuator; an electric machine capable of mechanical coupling to said internal combustion engine and operation as a motor and as a generator, each said electric motor operable as a generator and capable of electric coupling to said electric machine, said motor having a motor actuator; an actuating member allowing at least indirect coupling to said actuator; and a control system including; a detection system for creating a variable describing the actual state of travel of the vehicle; a first input coupled to said actuating member; a second input coupled to said detection system; and a first output coupled to said motor actuator for tuning a first output portion to be drawn from said driven wheel in the generator operation of said electric motor and fed to said internal combustion engine; and means for determining said first output. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification