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Method and apparatus for controlling a powertrain in an electric vehicle

A technology for power transmission systems and electric vehicles, applied in the direction of electric devices, control devices, electric vehicles, etc., can solve the problem of not being able to fully transmit high torque, high torque nominal value and power nominal value, and unable to meet performance requirements Standards and other issues, to achieve the effect of reducing operating costs, increasing mileage, and improving use efficiency

Active Publication Date: 2016-09-07
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in these cases the performance criteria cannot be met as they require larger torque and power ratings
[0006] Therefore, designing an electric motor to have an optimal operating point or duty point in the permissive cyclic load path results in a lower starting torque at high engine speeds, which in turn causes the electric motor to not start on a hill or at high speeds. can fully transmit high torque

Method used

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  • Method and apparatus for controlling a powertrain in an electric vehicle

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Embodiment Construction

[0021] According to an example of an embodiment, a drive train in an electric vehicle comprises at least two drive units arranged on different axles of the electric vehicle. In a typical operating mode of an electric vehicle, for example, in urban driving, for a predetermined torque demand and corresponding applicable rotational speed, the two drive units (in figure 1 Indicated as "motor 1" and "motor 2") energy consumption characteristics. The torque to be produced is distributed according to which drive unit has the more suitable efficiency for the relevant operating parameters, so that each drive unit operates at their optimum efficiency.

[0022] Preferably, the drive units are designed such that they can be disconnected from the drive train in the inactive state. This can be achieved, for example, by mounting a coupling device to the corresponding drive unit, whereby the mechanical connection between the drive unit and the axle can be released, or a separately excited sy...

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Abstract

The method involves adjusting ratio of rotational torques, provided by drive units for preset rotational torque, under consideration of power efficiency, applied for the drive units under preset operation conditions, in a first mode of operation. The ratio of rotational torques is adjusted independent of the power efficiency in a second mode of operation. A determination is made to find the drive unit having the maximum efficiency under the preset operation conditions, in the first mode of operation. One of the drive units is deactivated in the first mode of operation. The drive units are realized in form of in-wheel motors, near-wheel motors and axle motors. An independent claim is also included for a device for controlling a powertrain in an electric car.

Description

[0001] This application claims the benefit of foreign priority from German Patent Application No. DE102011087122.5 filed on November 25, 2011, the disclosure of which is hereby incorporated by reference in its entirety. technical field [0002] The present invention relates to a method and apparatus for controlling a driveline in an electric vehicle. Background technique [0003] In order to increase the range of an electric vehicle, it is especially important that the drivetrain works as efficiently as possible. In a conventional powertrain, a traction or electric motor and a transmission are designed such that both the performance requirements of an electric vehicle and the requirements for efficient energy utilization are met. [0004] Although performance standards for purely electrically driven motor vehicles (i.e., standards regarding the performance of the powertrain) require large torque values ​​and power values, typical driving cycles of electric vehicles occur in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L15/20
CPCB60L15/2045B60L50/51B60L2220/14B60L2220/42B60L2220/44B60L2220/46B60L2240/423B60L2260/28Y02T10/64Y02T10/70Y02T10/72
Inventor 阿努尔夫·斯潘赫默尔莫妮卡·德福林格罗格·格拉夫马克·西蒙
Owner FORD GLOBAL TECH LLC