Control method and system of new energy vehicle air pump
A technology for new energy vehicles and air pumps, which is applied to the layout of pumps/compressors, brakes, and vehicle components, and can solve problems such as air pumps not working, affecting vehicle brake operation, and vehicle safety.
Active Publication Date: 2019-02-15
WEICHAI POWER CO LTD
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Problems solved by technology
[0004] In view of this, the present invention provides a control method and system for an air pump of a new energy vehicle, which is used to solve the problem that if the air pressure sensor or pressure switch fails in the prior art, the air pump will not work when the system is under pressure, thereby affecting the vehicle. Brake operation and vehicle safety issues
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[0056] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0057] The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein...
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The invention discloses a control method of a new energy vehicle air pump. The control method of the new energy vehicle air pump comprises the steps of controlling a target air pump according to a target pressure switch; obtaining a first pressure value of a front axle brake air cylinder and a second pressure value of a rear axle brake air cylinder; according to the first pressure value and the second pressure value, judging whether a normal closed state of the target pressure switch is invalid or not; and if the normal closed state of the target pressure switch is invalid, converting the control of the target air pump from target pressure switch control into target pressure sensor control. According to the control method of the new energy vehicle air pump, the target air pump is controlled according to the target pressure switch; when it is judged that the normal closed state of the target pressure switch is invalid according to the first pressure value and the second pressure value,the control of the target air pump is converted from target pressure switch control into target pressure sensor control; and therefore, a problem that the air pump does not work to affect vehicle braking operation and vehicle safety when the system is undervoltage and if a pressure sensor or a pressure switch has a fault during only adopting sensor or pressure switch control is solved.
Description
technical field [0001] The invention relates to the technical field of air pump control, in particular to a method and system for controlling an air pump of a new energy vehicle. Background technique [0002] The air brake system is a kind of vehicle brake system. Its main advantage is that it can obtain a large braking force during the braking process. In the air brake system, the air pump inflates the air storage cylinder with compressed air at a certain pressure. Whether it works or not mainly depends on the air pressure sensor installed on the air storage tank, or the pressure switch on the dryer or air pipe, to collect the system pressure value or the pressure switch to control the on-off condition of the air pump, so as to control the operation of the air pump. [0003] The inventor studied the control process of the existing air pump and found that if the air pressure sensor or the pressure switch fails, for example: the pressure switch is still in the disconnected st...
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IPC IPC(8): B60T13/26B60T13/66B60T17/02
CPCB60T13/26B60T13/66B60T17/02
Inventor姜峰张芳时艳茹邓金涛乔运乾
OwnerWEICHAI POWER CO LTD