Method and system for controlling switching-on threshold value and switching-off threshold value of brake vacuum pump

A control method and technology for a control system, which are applied in the field of control methods and systems for the opening and closing thresholds of a brake vacuum pump, can solve the problems of inability to adjust the opening and closing thresholds of the vacuum pump, and reduce the probability of failure, prolong the service life, The effect of reducing working hours

Inactive Publication Date: 2015-08-19
BEIJING BORGWARD AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the problem in the prior art that the opening threshold and closing threshold of the vacuum pump cannot be adjusted according to the vehicle operating conditions, and provide a control method and system for the opening threshold and closing threshold of the brake vacuum pump

Method used

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  • Method and system for controlling switching-on threshold value and switching-off threshold value of brake vacuum pump
  • Method and system for controlling switching-on threshold value and switching-off threshold value of brake vacuum pump

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Embodiment 1

[0054] The invention is a method for controlling the opening threshold and closing threshold of a brake vacuum pump, comprising the following steps:

[0055] Information obtaining step: obtain current vehicle speed information and braking information.

[0056] Threshold setting step: through the current vehicle speed information and braking information, set the opening threshold and closing threshold of the vacuum pump respectively according to the speed of the vehicle and the magnitude of the braking signal. Under the premise of ensuring braking safety, reduce Working hours of the vacuum pump.

[0057] As other alternative implementations, in addition to the above-mentioned vehicle speed information and braking information, thresholds can also be set in conjunction with current vehicle operating conditions such as road conditions, vehicle performance and other parameters, and these values ​​are used to set the opening threshold and threshold of the vacuum pump. When closing ...

Embodiment 2

[0080] As an embodiment of the present invention, on the basis of Embodiment 1, it also includes the step of correcting the opening threshold and closing threshold of the vacuum pump according to the current atmospheric pressure, and the step of correcting the atmospheric pressure further includes the following steps:

[0081] Collect the current outside atmospheric pressure.

[0082] The atmospheric pressure correction coefficient is obtained by dividing the current external atmospheric pressure by the standard atmospheric pressure.

[0083] The atmospheric pressure correction coefficient is multiplied by the obtained vacuum pump opening threshold and the vacuum pump closing threshold, and the obtained values ​​are respectively used as the final vacuum pump opening threshold and closing threshold.

[0084] The invention can adjust the opening and closing of the vacuum pump according to the current atmospheric pressure, and further enhances the performance of the vehicle braki...

Embodiment 3

[0086] The present invention is a control system for opening threshold and closing threshold of brake vacuum pump, such as figure 2 shown, including:

[0087] The information obtaining device is used for obtaining at least current vehicle speed information and braking information.

[0088] The threshold setting device is used to respectively set the opening threshold and the closing threshold of the vacuum pump according to the current vehicle speed information and the braking information. Through the current vehicle speed information and the braking information, at least according to the speed of the vehicle and the magnitude of the braking signal Set the opening threshold and closing threshold of the vacuum pump separately, and reduce the working time of the vacuum pump under the premise of ensuring braking safety.

[0089] As other alternative implementations, in addition to the above-mentioned vehicle speed information and braking information, thresholds can also be set ...

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Abstract

The invention provides a method and system for controlling the switching-on threshold value and the switching-off threshold value of a brake vacuum pump. The method comprises an information acquiring step and a threshold value setting step. According to the information acquiring step, at least the current vehicle speed information and brake information are acquired. According to the threshold setting step, the switching-on threshold value and the switching-off threshold value of the vacuum pump are set respectively at least according to the speed of a vehicle and the magnitude of brake signals through the current vehicle speed information and the brake information, and the working time of the vacuum pump is reduced under the premise that the braking safety is guaranteed. According to the method and system, the switching-on threshold value and the switching-off threshold value of the vacuum pump can be set according to the current vehicle speed information and the brake information, so that the various working conditions of the vehicle in the traveling process are fully considered; under the premise that the brake safety is absolutely guaranteed, the working time of the vacuum pump can be reduced to the greatest extent, the probability of breakdowns due to long-time working of the vacuum pump is lowered, and the service life of the vacuum pump is effectively prolonged.

Description

technical field [0001] The invention relates to a vacuum pump control method and system, in particular to a method and system for controlling the opening threshold and closing threshold of a braking vacuum pump. Background technique [0002] With the development of the automobile industry and the requirements of energy and environment for sustainable development, new energy vehicles have gradually entered the public's field of vision, and electric vacuum pumps are also widely used in the braking systems of hybrid and pure electric vehicles. In the traditional vacuum pump control method, under the condition of sufficient power, the vacuum pump is in the working state for a long time, which may easily cause the electric vacuum pump to malfunction, affect the braking safety, and also cause some unnecessary energy loss. Therefore, on the basis of traditional control, the detection control of vacuum pressure is added, that is, when the vacuum pressure meets the conditions for tur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T13/72
CPCB60T13/72
Inventor 李任霞卢山杨伟斌
Owner BEIJING BORGWARD AUTOMOBILE CO LTD
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