Axle valve module and relay valve module of compressed air braking system

Abstract

The invention relates to an axle valve module (2 ') of a compressed air brake system. The compressed air brake system is used for operating a wheel brake of a vehicle axle. The axle valve module has arelay valve (26), to the control pressure input (36) of which a control pressure line (48) is connected, which can be alternately connected via a changeover valve (74) to a brake pressure line (20 ')that conducts the controlled brake pressure or to a reserve pressure line (14') that conducts the reserve pressure. In order to adjust the accurate and equal brake pressure in wheel brake cylinders at the two sides of a vehicle axle within a certain driving safety function range, a shut-off valve (76) is arranged in the control pressure line (48) of the relay valve (26) between the changeover valve (50, 74) and the control pressure input (36) of the actuating valve (26), by means of which the shut-off valve can block the control pressure applied to the control pressure input (36) of the relayvalve (26) as required.

Description

technical field [0001] The invention relates to an axle valve module of a compressed air brake facility for operating wheel brakes of a vehicle axle of a wheeled vehicle, the axle valve module having a relay valve at the control pressure input of the relay valve A control pressure line is connected to the top, which can be alternately connected via a changeover valve to a brake pressure line carrying a controlled incoming brake pressure or to a reserve pressure line carrying a reserve pressure, and the axle valve modules for each side of the axle At least one of the wheel brake cylinders each has an ABS inlet valve and an ABS outlet valve, which are each designed as a pressure-controlled diaphragm valve with an associated pilot control valve, wherein the pilot control valves are embodied clockwise controllable 3 / 2 solenoid switching valves, via which the pilot control valves can alternately load the control pressure chambers of the associated diaphragm valves respectively on t...

AI Technical Summary

Problems solved by technology

[0006] Based on component tolerances in the case of the ABS valve and its pre-control valve, it may be possible under certain functions where the braking force should be equally large on both sides of the axle, e.g. in electronic brake force limiting (EBL) and via pitch speed regulation ( In the case of automatic emergency braking with the brake assist of the ACC), brake pressures of different magnitudes occur in the wheel brake cylinders on both sides of the vehicle axle and thus lead to instability of the wheeled vehicle

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