Semi-lock brake system utilizing load sensing proportioning valve and spring membrane

Anti-lock braking system is a modern braking system which could significantly improve directional stability and reduce stopping distance of a car. However this system still is too complicated and expensive to use on every car because its use complicated and control system.

In this research, without using an expensive control system a combination of load-sensing proportioning valve and spring membrane was used as a main component to develop the effect of anti-lock braking system.

Based on vertical load applied on each tire, a load-sensing proportioning valve could control fluid pressure to the appropriate level to lock the wheel. On the other hand, a spring membrane could fluctuate pressure of brake fluid in order to develop the effect of anti-lock braking system.

The result shows that load-sensing proportioning valve alone could control fluid pressure in order to reach equal time lock between front and rear wheels. A combination of load-sensing proportioning and spring membrane could develop significant effect of anti-lock braking system called semi-lock brake system which is simple and economic enough to use for every car.