VEHICLE THEFT - PREVENTING DEVICE ACTING ON THE BRAKE SYSTEM

摘要

There are known devices for preventing theft of vehicles and trailers, the brake deceleration and the parking brake consist of brakes actuated by compressed air. The device comprises a valve controlled by a code lock. To double the security against manipulation of the locking device, the valve consists of a three-way valve (14) with an inlet port and two outlet ports (16, 17), this valve (14) being mounted in the supply line (11) between a source of pressurized fluid (4) for actuating the parking brake and the control valve (12) of the parking brake, the inlet port being connected to the pressure medium source (4). An outlet port (16) is connected to the control valve (12) and the second outlet port (17) is connected to the decelerating brake circuit for each pair of wheels (1) via a first check valve (19). The supply line (9) from the actuating deceleration brake pedal valve (6) comprises a second stop valve (21) and the valve body (23) of the three-way valve (14 ) by the locked position of the code lock (15) is held in a position closing the connection between the inlet and the above-mentioned outlet (16), but maintains an open connection between the port inlet and the second outlet (17), and vice versa, in an open position of the lock code, and the line (18) between the three-way valve (14) and the first shutoff valve (19 ) is discharged from the pressure when the code lock assumes an open position.