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

A technology for motor vehicles and driving axles, which is applied in electric vehicles, electrical devices, vehicle components, etc., and can solve problems such as speed disadvantages.

A technology for motor vehicles and driving axles, which is applied in electric vehicles, electrical devices, vehicle components, etc., and can solve problems such as speed disadvantages.

CN109982887BActive Publication Date: 2022-04-19AUDI AG
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  • All-wheel system for an electric vehicle and method for operating an all-wheel system of such a vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] in the only attached figure 1 A schematic diagram of a motor vehicle 10 with an all-wheel system 12 is shown in . 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 machines 14 , 20 is preferably equal to the maximum outputtable electrical power of the power battery (not shown here). If a traction battery (not shown here) can ou...

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Abstract

The invention relates to an all-wheel system (12) for a motor vehicle (10), comprising: a first electric motor (14) for driving a first drive axle (16) of the motor vehicle (10); First power electronics (18) for the rotational speed of the first electric machine (14); second electric machine (20) for driving the second drive axle (22) of the motor vehicle (10); second power electronics (24) ), the second power electronic device is used to control the second motor (20) according to the speed of the first motor (14) and the prescribed speed difference between the first motor (14) and the second motor (20) speed. The invention also 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 speed difference or slip difference (Differenzschlupf) between the two driven axles. The basis for this is...

Claims

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Application Information

Patent Timeline
19 Apr 2022
Publication
CN109982887B
IPC
B60L15/20; B60L3/10; B60K1/00; B60K7/00; B60K17/354; B60K17/356
CPC
B60K1/00; B60K17/354; B60K17/356; B60L3/106; B60L15/20; B60L15/2072; B60K2001/001; B60L2240/421
Inventors
M·魏因; M·贝尔