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1. (WO2017068085) A HYDRAULIC BRAKE ACTUATOR

Pub. No.:    WO/2017/068085    International Application No.:    PCT/EP2016/075298
Publication Date: Fri Apr 28 01:59:59 CEST 2017 International Filing Date: Fri Oct 21 01:59:59 CEST 2016
IPC: B60T 13/22
Applicants: CNH INDUSTRIAL ITALIA S.P.A.
CNH INDUSTRIAL AMERICA LLC
CNH (CHINA) MANAGEMENT CO., LTD
Inventors: CIARROCCHI, Marco Pietro
VESCOVINI, Maurizio
Title: A HYDRAULIC BRAKE ACTUATOR
Abstract:
A dual-purpose valve (20) for a braking system (10'), comprises: a two-position hydraulic brake control valve (46) coupled to a moveable valve member (34), a brake control chamber (76) for holding fluid; a brake port (73) for connecting to a brake cylinder (17); and a tank port (74). Movement of the moveable valve member (34; 44) in a first direction towards a brake deactivation position maintains the hydraulic brake control valve (46) in a closed state, and causes pressurised fluid flow from the brake control chamber (76) to the brake port (73) disengaging the braking system (10'). Movement of the moveable valve member (34; 44) in a second direction towards a brake activation position alters the hydraulic brake control valve (46) from a closed state to an open state, and permits pressurised fluid flow from the brake port (73) to the tank port (74) through the dual-purpose valve (20).