Patent ID: 11970146
Assignee: ZF CV SYSTEMS EUROPE BV
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 8:
9. The secondary brake system (46, 46′) as claimed in claim 6, wherein the pilot valve (72) that is assigned and connected to the controllable check valve (62) is a 3/2-way solenoid switching valve with a pilot valve pressure medium inlet, a pilot valve pressure medium outlet and a pilot valve control outlet, wherein the pilot valve pressure medium inlet is connected via a connector line (70) to the supply line (52), the pilot valve pressure medium outlet is connected to the further pressure medium sink (16c), and the pilot valve control outlet is connected to the check valve control inlet, wherein the pilot valve control outlet is connected to the pilot valve pressure medium outlet in the non-energized state and is connected to the pilot valve pressure medium inlet in the energized state, and wherein an electromagnet of said pilot valve (72) is actuated by the brake control unit (48) via an electric control line (74).