SU1495176A1 - Pneumatic brake actuator - Google Patents

Abstract

FIELD: transport engineering. The purpose of the invention is to improve traffic safety by ensuring the stability of the car on roads with a low coefficient of adhesion. The brake actuator includes a compressor 1, receivers 2 and 3, and a two-piece brake valve 4 for controlling the supply of compressed air to the brake chambers 5-7, respectively, front, middle and rear axles. Chambers 6 and 7 are connected to valve 4 via solenoid valves 8 and 9, electrically connected to the current source 10 via a switch 11 located on the brake pedal 12 and switch 17. The windings of each valve 8 and 9 are connected to the switch 11, respectively. The contacts 13 of the relay 14 and the contacts 15 of the relay 16 and the switch 17 are installed under the pedal 12. When the pedal 12 is pressed, the switch 11 is activated and the coil of one of the valves 8 or 9 turns on (depending on the initial position of the switch 17). With increasing force pressing the pedal 12, the switch 17 is activated, which will turn on the winding of the other valve 9. 1 Il.

Description

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The invention relates to transport engineering, in particular to pneumatic brake systems of wheeled vehicles.

The purpose of the invention is to improve traffic safety by ensuring the stability of the car on roads with a low coefficient of adhesion.

The drawing shows a schematic diagram of an air brake actuator.

The brake actuator includes compressor 1, connected through receivers 2 and 3 with a two-piece brake crane 4, brake chambers 5-7, respectively, front, middle and rear axles. The brake chambers 6 and 7 of the middle and rear sinks are connected to a two-piece brake valve 4 via solenoid valves 8 and 9, the windings of which are connected to the current source 10 by means of a switch 11 located on the brake pedal 12 via the contacts 13 20 of the relay 14 and contacts 15 are relays 16 and through switch 17, which is applied by the brake pedal 12.

Brake nerve works as follows.

When the pedal 12 is pressed, the switch I 1 is activated and the winding of one of the valves 8 or 9 is turned on (depending on the initial position of the switch 17). Suppose that in the initial position the switch 17 connects the switch coil 11 to the switch 11. Then when the brake pedal 12 is pressed, the valve coil 8 of the middle bridge turns on, contacts 13 and relay 14 and the upper section of the two-section brake valve 4 connects the receiver 2 the brake chambers have 6 wheels of the middle bridge, and the lower one - the receiver 3 with the slow chambers 5 of the front axle. Braking is performed by the front and middle axles. Such braking eliminates the locking of the wheels of the middle axle by transferring a part of the torque from the unbraked rear axle to the medium axle rigidly connected with the transmission, which is the new stability of the car when braking on roads with low traction. When the brake pedal is released, the air from the brake chambers 5 of the front axle through the two-section brake valve 4, and from the brake chambers 6 of the middle axle through the valve 8 goes into the atmosphere.

measures 15 of relay 16 (the winding of the valve 8 remains activated by the contacts 13 of the relay 14). Thus, a two-piece brake valve 4 connects the receiver 2 to the brake chambers 7 and 6 of the rear and middle

- bridges. When releasing the pedal 12, the air from the brake chambers 5 of the front axle through the two-section brake valve 4 and 3 of the brake chambers 6 and 7, the middle and rear axles through the valves 8 and 9 goes into the atmosphere.

10 Complete disinhibition occurs. When the pedal 12 is pressed again, the switch 11 is activated and the switch 17 of the rear axle is turned on by means of the switch 17, and the contacts 15 of the relay 16 are closed. Thus, the upper section of the two-section brake valve 4 connects the receiver 2 to the brake chambers 7 of the rear axle wheels, and lower - receiver 3 with brake chambers 5 front axle. This braking eliminates the locking of the rear axle wheels by transferring part of the torque from the unbraked middle axle to the rear axle rigidly connected with the transmission, which increases the stability of the vehicle when braking on roads with a low traction coefficient.

After each emergency braking, the electromagnet electropneumatic cocks 8 and 9 are alternately turned on, which prevents uneven wear of the elements of the rear car brakes.

Claims (1)

Invention Formula 25 thirty 35 40 45 Pneumatic braking drive, mainly for a car with a blocked power drive of a two-axle rear carriage, containing receivers connected via a pedal-operated brake crane to brake chambers of the front axle and rear car axles, characterized in that, in order to improve driving safety by ensuring vehicle stability roads with low adhesion, it is equipped with solenoid valves to selectively communicate the brake chambers of the rear car bridges with the brake section Nogo crane and control system, including a switch mounted to the pedal connecting the system to a power source, a switch for selectively connecting Complete disinhibition occurs. 50 solenoid valve windings through Emergency braking occurs with an increase in the force applied to the brake pedal 12, which presses the button of the switch 17 and it turns on the winding of the rear axle valve 9, closing the switch to the current source, having a control button installed under the pedal, and two relays with closed contacts, Connecting switch contacts. , 0 measures 15 of relay 16 (the winding of the valve 8 remains activated by the contacts 13 of the relay 14). Thus, a two-piece brake valve 4 connects the receiver 2 to the brake chambers 7 and 6 of the rear and middle  bridges. When releasing the pedal 12, the air from the brake chambers 5 of the front axle through the two-section brake valve 4 and 3 of the brake chambers 6 and 7, the middle and rear axles through the valves 8 and 9 goes into the atmosphere. Complete disinhibition occurs. When the pedal 12 is pressed again, the switch 11 is activated and the switch 17 of the rear axle is turned on by means of the switch 17, and the contacts 15 of the relay 16 are closed. Thus, the upper section of the two-section brake valve 4 connects the receiver 2 to the brake chambers 7 of the rear axle wheels, and lower - receiver 3 with brake chambers 5 front axle. This braking eliminates the locking of the rear axle wheels by transferring part of the torque from the unbraked middle axle to the rear axle rigidly connected with the transmission, which increases the stability of the vehicle when braking on roads with a low traction coefficient. After each emergency braking, the electromagnet electropneumatic cocks 8 and 9 are alternately turned on, which prevents uneven wear of the elements of the rear car brakes. Invention Formula five 0 Pneumatic braking drive, mainly for a car with a blocked power drive of a two-axle rear carriage, containing receivers connected via a pedal-operated brake crane to brake chambers of the front axle and rear car axles, characterized in that, in order to improve driving safety by ensuring vehicle stability roads with low adhesion, it is equipped with solenoid valves to selectively communicate the brake chambers of the rear car bridges with the brake section Nogo crane and control system, including a switch mounted to the pedal connecting the system to a power source, a switch for selectively connecting solenoid valve windings through a switch to the current source, having a control button installed under the pedal, and two relays with short-circuiting contacts that connect the contacts of the switch.