Control method of electronic vacuum pump for vehicle and vehicle electronic control unit for realizing the method
An electronic vacuum pump and control method technology, applied in brakes, vehicle parts, transportation and packaging, etc., can solve the problems of loss of braking performance, vacuum pump opening and closing too late, vacuum pump constant rotation, etc., to reduce energy consumption and noise, and be simple Effect of control logic, excellent control effect
Active Publication Date: 2018-01-23
SAIC GENERAL MOTORS +1
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, in this mode, the control accuracy is very sensitive to the setting of the control threshold. If the control threshold is set too high, the vacuum pump will be turned on too early and turned off too late, and sometimes the vacuum pump will run constantly, which will shorten the life of the electronic vacuum pump. On the other hand, if the control threshold is set low, although the loss of the electronic vacuum pump can be slowed down, it may cause the electronic vacuum pump to turn on too late and turn off too early, and even cause the electronic vacuum pump to fail to turn on, resulting in loss braking performance
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0030] The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. This invention may, however, be embodied in different forms and should not be construed as limited to only the embodiments set forth herein. The above-mentioned embodiments are given to make the disclosure of this document comprehensive and complete, so as to make the understanding of the protection scope of the present invention more comprehensive and accurate.
[0031] Words such as "comprising" and "comprising" mean that in addition to the units and steps that are directly and explicitly stated in the specification and claims, the technical solution of the present invention does not exclude other elements that are not directly or explicitly stated. Situation of units and steps.
[0032] Words such as "first" and "second" do not denote the order of elements in terms of time, space, size, etc. but are me...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to the braking technology, in particular to a vehicle electronic vacuum pump control method and a vehicle-mounted electronic control unit for implementing the method. According to one embodiment of the invention, the vehicle electronic vacuum pump control method comprises the following steps: obtaining a vacuum level in a vacuum booster; comparing the vacuum level with a control threshold to determine the open-close state of an electronic vacuum pump; and causing the electronic vacuum pump to be in an opened or closed state according to the comparison result, wherein the control threshold is dynamically adjusted according to the current elevation of a vehicle, and the higher the elevation is, the smaller the control threshold is.
Description
technical field [0001] The invention relates to braking technology, in particular to a control method of a vehicle electronic vacuum pump and a vehicle electronic control unit for realizing the method. Background technique [0002] The way the on-board electronic control unit controls the electronic vacuum pump generally includes open-loop mode and closed-loop mode. In the former mode, the on-board electronic control unit does not depend on the vacuum level in the vacuum booster for the opening and closing of the electronic vacuum pump. This mode has the advantage of being simple to implement, but the control accuracy is poor. In the closed-loop mode, the on-board electronic control unit determines the on-off state of the electronic vacuum pump according to the measurement signal of the vacuum sensor. Specifically, the on-board electronic control unit compares the measured vacuum level signal with the control threshold, and determines the on-off state of the electronic vac...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): B60T13/52B60T13/72
CPCB60T13/52B60T13/72
Inventor 夏天刘拥军王强赵向东袁旭亮
Owner SAIC GENERAL MOTORS