Will the braking effect be improved with the increase of air flow in relay valve?

As for the problem of truck braking, most drivers will be cheated. Many roadside stores replace some brake valve parts of the original factory for the sake of profit. In fact, they increase the passing air volume of the master
cylinder or relay valve, giving people the feeling that the braking force is improved.

What is the principle? Why do you feel the brake is strong

In fact, it just ignores the part of the stroke with small amount of brake air and directly enters the atmospheric stroke. Lift the area with large braking force forward, and you feel that the brake will come with a little bit on your foot, which gives you a better feeling of braking.

At first, the piston of the master cylinder was polished or the gasket was added to achieve the above effect. This should be the earliest form. In fact, the modified master cylinder has the same principle. Now it is just a complete mass production product, which can be replaced directly.

It’s not reliable to replace and refit valve parts.

In fact, these modified valves on the market shorten the response time by increasing the amount of air. In fact, it is only in the subjective consciousness of the car owners that the brake has become stronger.

Some trailer owners even refit their new car when they come home. Some car owners replace the pump valve of the original car with refitted valve after driving a certain mileage due to the wear of brake components or improper maintenance. Braking is not one-sided, but a whole. We must pay attention to the coordination, especially the trailer.

We all know that the trailer and the main car brake coordination, in order to ensure the effect of the brake. After replacing the modified valve parts, the coordination of the brake of the whole vehicle is destroyed.

And after refitting, the linear growth of braking force almost disappeared. As some car owners said, stepping lightly means locking, but stepping heavily is useless. Because the modified parts increase the amount of over air, the brake pressure will drop faster. For some cars with slow inflation, the downhill pressure may not be enough, which is also a dangerous and troublesome thing. Maybe many car owners have had this experience. After refitting the valve, the brake drum is obviously not durable.

The brake drum often breaks. Sometimes the new brake drum has to be replaced before it runs many miles. At the same time, the braking distance of the vehicle has not been shortened, but has been extended. It is not reliable to blindly refit the vehicle without finding the cause of poor braking.

It’s important to maintain the brakes
In practice, the brake is not easy to use, many of which are caused by incorrect maintenance. For example, the use of fake brake pads and brake drums, and some may usually ignore the maintenance of the brake gas path, such as irregular replacement of drying cans; for the brake, only the replacement of brake pads, not the maintenance of camshaft and other components, which are all factors affecting the braking effect and stability.

If you don’t fundamentally find out the problem of brake deterioration and refit the valve, you will feel that the brake is better in a short time. After using it for a long time, these problems will gradually enlarge, so that your brake will fall into a vicious repair cycle. No matter what you change, it doesn’t seem to work. Therefore, normal maintenance is the right posture.

Summary: the brake quality, directly related to the driving safety of the owners, and the modified valve surface is to enhance the brake, to ensure safety. The brake is better or worse is usually maintained, it is not reliable to simply change a modified valve to solve the problem.