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All-wheel system for an electric motor vehicle, and method for operating an all-wheel system of such a vehicle

A technology for motor vehicles and driving axles, applied in electric vehicles, electrical devices, vehicle components, etc., can solve problems such as speed disadvantages, achieve the effects of reducing wheel slip and improving traction

Active Publication Date: 2019-07-05
AUDI AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Electric all-wheel systems have a speed disadvantage compared to coupling the two drive axles by means of a coupling (as in conventional all-wheel systems with only an internal combustion engine)

Method used

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  • All-wheel system for an electric motor vehicle, and method for operating an all-wheel system of such a vehicle
  • All-wheel system for an electric motor vehicle, and method for operating an all-wheel system of such a vehicle

Examples

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Embodiment Construction

[0025] The single drawing shows a schematic illustration of a motor vehicle 10 with an all-wheel system 12 . The motor vehicle 10 shown here is an electrically driven motor vehicle. All-wheel system 12 includes a first electric machine 14 for driving a first axle 16 of motor vehicle 10 . All-wheel system 12 also includes first power electronics 18 for controlling first drive motor 14 of motor vehicle 10 . All-wheel system 12 also includes a second electric machine 20 for driving a second drive axle 22 of motor vehicle 10 . The all-wheel system 12 also includes a second power electronics system 24 for controlling the second electric machine 20 .

[0026]The two electric machines 14 , 20 are fed with electrical energy by means of a traction battery (not shown here). The maximum power of the electric machine 14 , 20 is preferably equal to the maximum electrical power output by the power battery (not shown here). If a traction battery (not shown here) can output a power of, fo...

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PUM

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Abstract

The invention relates to an all-wheel system (12) for a motor vehicle (10), comprising a first electric machine (14) for driving a first drive axle (16) of the motor vehicle (10); a first electronic power unit (18) for controlling a rotational speed of the first electric machine (14); a second electric machine (20) for driving a second drive axle (22) of the motor vehicle (10); a second electronicpower unit (24) for controlling the rotational speed of the second electric machine (20) on the basis of the rotational speed of the first electric machine (14) and a specified differential rotational speed between the first electric machine (14) and the second electric machine (20). The invention additionally relates to a method for operating an all-wheel system (12) of a motor vehicle (10).

Description

technical field [0001] The invention relates to an all-wheel system / all-wheel drive system for a motor vehicle and a method for operating an all-wheel system of a motor vehicle. Background technique [0002] Today's electric all-wheel systems are usually torque-regulated. The target torques are specified for the power electronics of the individual electric axle drives. The sum of the torques specified for the power electronics reflects the sum of the drive torques desired by the driver or the sum of the drive torques permitted by the slip control / traction control of the drive system. Depending on variables such as yaw rate, longitudinal acceleration and / or steering angle, the all-wheel drive control system selectively changes the distribution of drive torque in order to improve driving performance. A further control objective is usually the targeted adjustment of the rotational speed difference or slip difference (Differenzschlupf) between the two drive axles. The basis f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/20B60L3/10B60K1/00B60K7/00B60K17/354B60K17/356
CPCB60K1/00B60K17/354B60K17/356B60L3/106B60L15/20B60L15/2072B60K2001/001B60L2240/421B60L2240/423B60L2260/28B60W2510/081B60W2710/081B60W2720/403Y02T10/64Y02T10/72Y02T10/62B60K1/02B60K1/04B60K17/24B60L15/2036H02P5/50
Inventor M·魏因M·贝尔C·格拉夫K-H·梅廷格尔
Owner AUDI AG
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