Air assisted braking system
AssigneeAutomotive Products plc
InventorsDavid Parsons, Harold Hodkinson
Life of this patent
Estimating the term…
Abstract
This invention relates to an air powered braking system for a vehicle. The air pressure in the front and rear brake systems is regulated by a respective one of a pair of air pressure valves. The air valves are hydraulically controlled and each valve (16) and (26) is independently connected to a driver operable hydraulic master cylinder so that the air pressure in each of the front or rear systems is proportional to the hydraulic pressure generated at the master cylinder (11). A hydraulic reducing valve is interposed in the hydraulic circuit between the master cylinder and the rear brake system air valve and operation of the reducing valve reduces the hydraulic pressure to that air valve and hence reduces the air pressure to the rear brakes relative to the air pressure to the front brakes.
Claims4
An air powered braking system for a vehicle and comprising;
- a front wheel air powered brake system;
- a rear wheel air powered brake system;
- a pair of air pressure valves each of which regulates the air pressure in its respective one of the front or rear brake systems, said air valves being hydraulically controlled so that the air pressure in each of said front and rear systems is proportional to the hydraulic pressure;
- a hydraulic master cylinder operable by the vehicle driver and independently connected to each of air valves so as to generate said hydraulic pressure;
- and a pressure reducing valve interposed in the connection between the master cylinder and the rear brake system air valve so that on operation of the reducing valve to reduce the hydraulic pressure to that air valve the air pressure in the rear brake system relative to that in the front brake system is also reduced.
Dependencies are inferred from the claim text.