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Getting Started in One Minute What is the purpose of the adapter valve on the tractor?

2021-09-15


[Reprinted from Truck Home, Invasion and deletion] The adaptation valve was first applied to the model with the front disc and the rear drum. Since the disc brake has the characteristics of automatic slack adjustment, the earlier transaxles used non-automatic brake slack adjustment arms. In order to solve the problem that the front brake is too sensitive when the front disc and rear drum type vehicles are braked due to the increased braking clearance, an adaptive valve is installed on the front axle braking system for adjustment.

● Adaptive valve action, the braking force is soft and gentle, and the braking force is not affected

However, due to a series of reasons, the braking system of the tractor will be out of sync, or the guide wheel brakes earlier than the rear tires. In order to prevent the phenomenon of "push head" on the slippery road, most users will release the braking system of the guide wheel after purchasing the vehicle. Although this will avoid certain dangers, the braking distance will be extended a lot, so is there a simple way to change this situation? Here we first briefly talk about the working principle of the adapter valve.

Getting Started in One Minute What is the purpose of the adapter valve on the tractor?

In the line graph above, the horizontal axis is the input air pressure, and the vertical axis is the output air pressure.

WABCO Jiang Gong said that in fact, the working principle of the adaptor valve is very simple, that is, through the adjustment mechanism inside the valve, when the air pressure input to the adaptor valve is lower than a certain value (we assume this value is 3 kg), the output terminal When the air pressure is about 1 kg, the adaptor valve plays a role in reducing pressure; when the air pressure input to the adaptor valve is greater than 3kg, the air pressure at the output end is synchronized with the input end, and the adaptor valve does not play any role at this time, realizing the input Thru with output.

Getting Started in One Minute What is the purpose of the adapter valve on the tractor?

If it is shown on the vehicle, that is, when the brakes are lightly applied, the front axle brakes of the vehicle are softer; when the brakes are applied heavily, the front axle brakes will not be affected.