Air suspension vehicle load sensing valve system and control method thereof

Abstract

An air suspension vehicle load sensing valve system comprises an air storage barrel, a load sensing valve, a suspension air bag, a braking air chamber, an auxiliary air storage barrel and a controller. The air storage barrel communicates with the braking air chamber through the load sensing valve, the auxiliary air storage barrel communicates with the load sensing valve through an electromagneticvalve and a two-way valve sequentially, the suspension air bag communicates with the load sensing valve through the two-way valve and is in signal connection with the controller through an air pressure sensor, and the controller is in signal connection with the electromagnetic valve, a braking signal and a vehicle speed signal. When air leaks from the suspension air bag, the air pressure sensor obtains a low air pressure signal of the suspension air bag and transmits the low air pressure signal to the controller, in combination with the braking signal and the vehicle speed signal, the controller controls the electromagnetic valve to be opened, at the moment, the auxiliary air storage barrel communicates with the load sensing valve through the electromagnetic valve and the two-way valve sequentially and provides the air pressure signal for the load sensing valve so that it can be guaranteed that the braking air pressure output by the air storage barrel to the braking air chamber is nottoo low, and traveling safety is guaranteed. The designed air suspension vehicle load sensing valve system is high in safety, easy and convenient to operate and high in reliability.

Description

technical field [0001] The invention relates to the technical field of air suspension, in particular to an air suspension vehicle load sensing valve system and a control method thereof, which are mainly applicable to improving safety performance. Background technique [0002] At present, for cars equipped with air suspension, if the rear axle is equipped with a load-sensing valve, the air pressure signal needs to be obtained from the pipeline connected to the suspension airbag. High air pressure indicates that the vehicle is heavily loaded, and the output braking force is large. Braking power is small. [0003] Chinese patent, the authorized announcement number is CN200939876Y, and the utility model with the authorized announcement date on August 29, 2007 discloses an automotive load sensing valve assembly, which is used for vehicles with air suspension systems. The air control method is adopted, the airbag pressure is used as the control signal, the vehicle load is sensed ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects and problems of low safety in the prior art, and provide a high safety air suspension vehicle load sensing valve system and its control method

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