Valve assembly designed for connection to a pneumatic braking system of a braking system, braking system and trailer vehicle

The valve device addresses the need for improved pneumatic braking systems by using a check valve to manage pressure levels and ensure consistent braking performance and safety with emergency braking and manual control, enhancing compatibility with various brake pressure modulators.

DE102024135533A1Pending Publication Date: 2026-06-03ZF CV SYST GLOBAL GMBH
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Patent Information

Authority / Receiving Office
DE · DE
Patent Type
Applications
Current Assignee / Owner
ZF CV SYST GLOBAL GMBH
Filing Date
2024-11-29
Publication Date
2026-06-03

AI Technical Summary

Technical Problem

Existing pneumatic braking systems for trailers lack improved functionality and safety, particularly in combination with brake pressure modulators that include emergency braking devices, and do not effectively manage pressure levels to ensure consistent braking performance during supply line failures or pressure drops.

Method used

A valve device with a check valve that maintains or separates the spring accumulator pressure from the reservoir pressure based on the supply connection's pressure state, enabling automatic emergency braking, manual parking brake operation, and independent control of front axle brakes, ensuring compatibility with various brake pressure modulators.

Benefits of technology

The valve device ensures consistent braking performance by maintaining or isolating spring brake pressure levels, enhancing safety and compatibility with different brake pressure modulators, and allowing manual control of parking brakes, even during pressure drops or uncoupling.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to a valve device (100, 200) designed for connection to a pneumatic brake device (300) of a brake system (1000) for a trailer vehicle (AF).The valve assembly (100, 200) has a supply port (1-1) connectable to the compressed air supply (DLV) of a towing vehicle (ZF), a reservoir port (1-2) connectable to the compressed air reservoir (VS), in particular on a service brake assembly (BB) of the brake assembly (300), a setpoint pressure port (4) connectable to the brake pressure setpoint (BDV) of a towing vehicle (ZF), a control pressure port (21) connectable to the control port (SA) of a brake pressure modulator (BM, BB1, BB2) of the brake assembly (300), an emergency pressure port (22) connectable to the emergency brake assembly (PB) of a brake pressure modulator (BM) of the brake assembly (300), a spring brake pressure port (23) connectable to at least one release chamber of a spring brake assembly (FS) of the brake assembly (300), and a vent port (3) for venting. the valve assembly into the environment.According to the invention, it is provided that, in the case of a pressureless supply connection (1-1), the spring accumulator pressure connection (23) is pneumatically connected to the reservoir connection (1-2) via a check valve (RSV) with a blocking effect from the reservoir connection (1-2) to the spring accumulator pressure connection (23), and in the case of a pressurized supply connection (1-1), the spring accumulator pressure connection (23) is pneumatically separated from the reservoir connection (1-2).
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Citation Information

Patent Citations

  • Trailer brake valve for trailers with electronic brake control and enhanced parked trailer safety

    DE10139757A1

  • Braking device of a trailer vehicle of a towing vehicle-trailer combination with at least two axles and a steered front axle

    DE102008003525C5

  • Pneumatic valve assembly for trailer vehicle

    DE102017011548A1

  • trailer parking brake system

    DE69705978T2