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Creep torque control method of electric vehicle

A technology of torque control and electric vehicles, applied in the direction of electric vehicles, control drives, brakes, etc., can solve problems such as accidents, inaccurate output torque, and jitter

Active Publication Date: 2018-06-29
WM SMART MOBILITY (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it cannot accurately output the required torque, which may cause vibration at the moment when the vehicle creeps, affecting comfort
Seriously, there will be a momentary lack of power on the slope, causing the vehicle to slide down the slope, resulting in an accident

Method used

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  • Creep torque control method of electric vehicle
  • Creep torque control method of electric vehicle
  • Creep torque control method of electric vehicle

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Embodiment Construction

[0057] This specification discloses one or more embodiments that incorporate the features of this invention. The disclosed embodiments are merely illustrative of the invention. The scope of the invention is not limited to the disclosed embodiments. The invention is defined by the appended claims.

[0058] References in the specification to "one embodiment," "an embodiment," "an exemplary embodiment," and the like indicate that the described embodiment may include a particular feature, structure, or characteristic, but that all embodiments do not necessarily include that particular feature, structure or property. Moreover, these phrases are not necessarily referring to the same embodiment. Furthermore, when a particular feature, structure or characteristic is described in connection with one embodiment, it is considered to be within the knowledge of those skilled in the art to implement such feature, structure or characteristic in connection with other embodiments (whether e...

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PUM

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Abstract

The invention discloses a creep torque control method of an electric vehicle. The method comprises the steps that whether the vehicle starts creep control or not is judged according to creep control parameters; final creep control torque is obtained according to the pressure of a brake master cylinder, the current slope of the vehicle and the current vehicle speed; control is achieved according tothe final creep control torque. According to the method, the power output of the vehicle under a creep function is optimized, so that driving of the vehicle is closer to the intention of a driver. Bymeans of the method, the driving comfort of the driver is improved, so that the starting of the vehicle on a ramp is safer. Meanwhile, the convenience of moving the vehicle is improved so that the vehicle can be conveniently parked and go out of a garage.

Description

technical field [0001] The invention discloses a creep torque control method of an electric vehicle. Background technique [0002] The creep control function of traditional automobiles is usually realized by the automatic transmission controller. Since the engine has a minimum idle speed limit, the creep control function needs to include torque control and differential speed control. The automatic transmission controller is controlled by clutch slip friction (DCT / AMT) or hydraulic torque converter coupling degree control (AT / CVT) to realize creep control function. For electric vehicles, since the power motor has no minimum speed limit, and many of the matched transmissions do not have clutches, the creep control method of traditional vehicles is no longer applicable. [0003] The creeping function of electric vehicles has the following advantages: first, creeping can help the driver to better control the vehicle, while releasing the brakes, the vehicle provides driving forc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/20B60W10/08B60W40/076B60W40/105B60W40/13B60T13/12
CPCB60L15/20B60T13/12B60W10/08B60W40/076B60W40/105B60W40/13Y02T10/72
Inventor 孔志杰韩利伟鲁连军
Owner WM SMART MOBILITY (SHANGHAI) CO LTD
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