PNEUMATIC BRAKE DRIVE OF VEHICLE Russian patent published in 2021 - IPC B60T13/26 

FIELD: transport engineering.

SUBSTANCE: invention relates to the field of transport engineering, in particular to pneumatic braking systems of wheeled vehicles. The brake drive contains a compressor 1 driven by an engine 2, connected to receivers 3, 4 and 5. In this case, the receivers 3 and 4 are connected through the main brake valve 6, which is driven by the brake pedal 7, with the cavities of the brake chambers 8 of the front working circuit and the brake chambers 9 of the rear working circuit, which are made at the same time with spring energy accumulators 10. The receiver 5 is connected to the cavities of the spring energy accumulators of the parking circuit through a parking brake 11, which has a manual drive. The main two-section brake valve 6 is equipped with an additional sequentially installed section 12, which forms an integral brake valve 13 with it. The additional section 12 is connected to the brake valve 6 through the bushing 16 and is made in the form of a housing 14 with one working cavity 15 and two inlet holes 19 and 20. Through the hole 19, the working cavity 15 is connected through the pipeline 43 to the receiver 5 by means of a parking crane 11, and through the hole 20 through the pipeline 44 it is connected to the working cavities of spring energy accumulators 10. A spring-loaded control piston 17 with a hollow rod 18 is placed in the housing 14. There is a flange 22 on the housing 14, in which an atmospheric valve 21 with grooves and a limit switch 58 are placed to signal to the control panel about an emergency operation of the parking brake system. In the normal state, the braking functions provide the working circuits by means of the main brake valve 6. In case of failure of the working circuits of the brake system, the vehicle is braked using the parking brake system due to the presence of an additional sequentially installed section 12 of the integral brake crane 13, having a hollow rod 18 with the possibility of transmitting mechanical action from the brake pedal 7 through the movable elements of the main two-section brake valve 6.

EFFECT: reduction of the stopping distance when performing emergency braking in the event of a decrease in the pressure in the receivers of both working circuits of the brake system below the permissible limit by reducing the driver’s reaction time by eliminating the need to activate an additional control body with informing the driver about the emergency mode of the parking brake system.

1 cl, 3 dwg