Dual-Piston Relay Valve Having an Anti-Compounding Function

摘要

A relay valve is provided for a vehicle. The valve includes a parking brake piston that is displaceable in a housing and an axially displaceable cuff, a first compressed-air chamber for receiving compressed air from a control line is formed between the parking brake piston and the housing. The valve is also provided with a first spring element, which axially applies a pre-loading force to the cuff, and with a second spring element, which axially applies another pre-loading force to the parking brake piston. An axially displaceable service brake piston is arranged axially between the parking brake piston and the cuff, the service brake piston rests at least radially against the parking brake piston and radially against the housing in a sealing manner, in order to form a second compressed-air chamber.

主权项

1. A relay valve for a vehicle, comprising:
a housing; a parking brake piston that is displaceable axially in the housing; an axially displaceable cuff; a first compressed air chamber for receiving compressed air from a control line formed between the parking brake piston and the housing; a first spring element, which loads the cuff axially with a preloading force; and a second spring element, which loads the parking brake piston axially with a further preloading force, and an axially displaceable service brake piston arranged axially between the parking brake piston and the cuff, said service brake piston coming into contact at least radially against the parking brake piston and radially against the housing in a sealing manner, in order to form a second compressed air chamber.