Air processing unit control method for commercial vehicles
A technology of air processing unit and control method, which is applied in the direction of brakes, vehicle components, brake transmission devices, etc., and can solve problems such as unconsidered, extensive, and inability to fully guarantee the normal and safe operation of vehicles
Active Publication Date: 2018-02-16
CHINA FIRST AUTOMOBILE
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Problems solved by technology
However, it does not consider various complex working conditions in the operation of the vehicle, and the processing method is too simple and extensive, which cannot fully guarantee the normal and safe operation of the vehicle.
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[0090] specific implementation plan
[0091] The specific implementation manners of the present invention will be described in further detail below in conjunction with the accompanying drawings.
[0092] Take the air handling unit control method of FAW's new generation of heavy-duty commercial vehicles as an example:
[0093] see figure 1 : The air processing unit APU inputs control information into the normal operating condition judgment, special operating condition judgment, and control state judgment unit; the control state judgment unit outputs information to the actuator control state processing and operating state according to different judgments. Processing unit; the actuator control state processing unit also inputs the processed information to the running state processing unit; finally generates the regeneration valve output control and diagnosis function, and the control valve output control and diagnosis function.
[0094] see figure 2 : The 3D data map of the a...
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The invention relates to an air processing unit control method for commercial vehicles. On the basis of accurately calculating the aeration quantity and regenerated return air quantity of an air compressor, self-adaptive control on system pressure and regeneration thresholds under various complicated operation conditions of vehicles is realized. The main process of the control method comprises seven steps: calculating an air compressor displacement F1 in real time based on an air compressor characteristic spectrum; calculating a regeneration throttle flow F2 in real time based on a regeneration throttle flow characteristic spectrum; calculating the use degree of a drying chamber; recognizing normal working conditions; recognizing special working conditions; judging a working state; and judging an actuator control state. Compared with the prior art, the control method provided by the invention considers various complicated working conditions in operation processes of the vehicles, adopts an exquisite processing mode and can completely ensure normal and safe operation of the vehicles. The control method provided by the invention is applied to FAW Jiefang new-generation heavy-duty commercial vehicles, and the system provided by the invention can meet the requirements of enterprise standards of the China FAW Group.
Description
technical field [0001] The invention belongs to the technical field of automobile electronic chassis control, and relates to a method for controlling an air processing unit of a commercial vehicle. Background technique [0002] At present, commercial vehicles generally use compressed air as the driving force to realize the control of the vehicle's braking system, doors and air suspension system. The commercial vehicle air processing unit APU (Air Processing Unit) is used to provide dry and clean compressed air to ensure the normal operation of the vehicle. The traditional mechanical APU structure cannot accurately control the inflation, unloading and regeneration process of the system, and cannot guarantee the quality of compressed air. The electronically controlled APU can accurately calculate the amount of air inflated by the compressor and the amount of regenerated return air, so as to realize the precise control of inflation, unloading and regeneration, and ensure air q...
Claims
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IPC IPC(8): B60T13/40B60G17/052
CPCB60G17/052B60G2500/205B60T13/40
Inventor 陈首刚吕征王明卿王聪张鹏
Owner CHINA FIRST AUTOMOBILE