Method for regulating a drag torque of a motor vehicle driven by an electric motor in consideration of the friction coefficient present on the roadway surface, and device for carrying out such a method

A technology of friction coefficient and adjusting device, which is applied in the field of drag torque of motor vehicles, and can solve problems such as wheel slippage of motor vehicles

Inactive Publication Date: 2011-05-18
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, when adjusting the drag torque in the known way, there is also the disadvantage that on slippery road surfaces, for example caused by thin ice layers or snow accumulations, the motor vehicle will be damaged when an artificial drag torque occurs. the wheels will spin
but such slippage is undesirable as it goes against the precise control of the motor vehicle

Method used

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  • Method for regulating a drag torque of a motor vehicle driven by an electric motor in consideration of the friction coefficient present on the roadway surface, and device for carrying out such a method
  • Method for regulating a drag torque of a motor vehicle driven by an electric motor in consideration of the friction coefficient present on the roadway surface, and device for carrying out such a method
  • Method for regulating a drag torque of a motor vehicle driven by an electric motor in consideration of the friction coefficient present on the roadway surface, and device for carrying out such a method

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Embodiment Construction

[0025] figure 1 An electrically driven motor vehicle 1 is shown. In the illustrated embodiment, a fuel cell vehicle is shown. Motor vehicle 1 has an electric machine which functions as electric motor 2 . The electric motor 2 can be switched into generator mode. This electric motor 2 produces current in generator mode (like a generator).

[0026] The fuel cell 3 takes fuel from the hydrogen tank 4 and converts it into energy. This energy is transferred to the pulsed inverter 5 and the converter 6 . The converter 6 is designed here as a DC / DC converter. This converter 6 regulates the charging and discharging behavior of the battery 7 .

[0027] The energy provided by the fuel cell 3 is transferred via a pulse inverter 5 to the electric motor 2 , which then transmits the energy to the wheels 9 of the motor vehicle 1 with the clutch and the transmission unit 8 interposed. This wheel 9 is rotated by means of the electric motor 2 , wherein energy is transmitted as required vi...

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Abstract

The invention relates to a method for regulating a drag torque of a motor vehicle driven by an electric motor, wherein a regulating device influences the drag torque with a corresponding change in the position of the accelerator pedal, wherein a sensor device senses a tire on a roadway surface on which the motor vehicle is present and provides the information to a computer, wherein the computer prompts the regulating device to adjust the drag torque as a function of the friction coefficient. The invention further relates to a device having means suitable for carrying out such a method.

Description

technical field [0001] The invention relates to a method for adjusting the drag torque of an electrically driven motor vehicle, wherein an adjusting device influences the drag torque when the position of the accelerator pedal changes accordingly. Background technique [0002] The most widely used types of motor vehicles currently use internal combustion engines. In recent decades, the average driver of such a motor vehicle has become accustomed to the deceleration behavior of the motor vehicle when "loosing the gas". Due to changing environmental conditions, electric vehicles are currently being used more and more. [0003] Both electrically driven motor vehicles and internal combustion engine driven motor vehicles have an accelerator pedal, which is influenced by the driver with his foot in order to determine the speed. [0004] However, motor vehicles with electric drive motors do not generate significant engine drag torque. In order to imitate the hitherto customary en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W30/02B60W20/00B60L7/18
CPCB60W30/045B60L2200/26Y02T10/7258B60L7/18B60W20/00Y02T10/72B60W20/10
Inventor U.戈特维克J.宾德
Owner ROBERT BOSCH GMBH
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