Air brake air dryer, air brake control system and vehicle

Abstract

The invention discloses a pneumatic brake air dryer, a pneumatic brake control system and a vehicle. The air inlet is communicated with the first air outlet through a first pipeline, and a drying cylinder and a one-way valve are sequentially connected in series on the first pipeline. The first pipeline communicates with the exhaust port through the second pipeline, and a two-position two-way unloading valve is connected in series on the second pipeline, and the first pipeline communicates with the second air outlet through the third pipeline, and the third pipeline is connected in series There is a two-position three-way pressure regulating valve, a regeneration valve and a return orifice connected in parallel and series beside the one-way valve, a two-position three-way unloading protection valve is connected in series on the third pipeline, and the first part of the two-position three-way unloading protection valve The control end communicates with the second control end, and the second control end of the two-position three-way unloading protection valve communicates with the intake end of the third pipeline through the regenerative throttle valve. The invention can ensure that the drier can perform unloading and regeneration control in the case of air leakage in the energy-saving control pipeline between the drier and the air compressor, prevent accumulated water from entering the braking system, and eliminate potential safety hazards of the braking system.

Description

technical field [0001] The invention discloses an air dryer for vehicles, belongs to the technical field of air dryers, and specifically discloses an air brake air dryer, an air brake control system and a vehicle. Background technique [0002] The air dryer and air compressor are the key assemblies of the air brake system of commercial vehicles. The compressed air provided by the air compressor is transmitted to the dryer through the air steel pipe, and the dryer filters the accumulated water and oil in the compressed air to provide The brake system provides clean compressed air, and through the control of the dryer's own unloading and regeneration, it can discharge accumulated water and oil into the atmosphere, so that the desiccant inside the dryer can be reused. In order to save the power consumption of the air compressor, more and more commercial vehicles are equipped with an energy-saving control system in the air compressor and dryer assembly, which corresponds to a ny...

AI Technical Summary

Problems solved by technology

[0006] Since the energy-saving control pipeline from the dryer to the air compressor is made of nylon, and there is a certain distance between the dryer and the air compressor, on the one hand, there may be irregularities in the assembly and bundling of the pipeline during the assembly process; There are cable ties damaged during use. Considering that the pipeline is connected to structural parts (frame, bracket, etc.), heat source (engine exhaust pipeline), etc., nylon pipes often wear or burst and leak.

[0007] Once the energy-saving control nylon pipe leaks, the air pressure at the control end 3.2 of the dryer unloading valve 3 cannot be established, resulting in the failure of the dryer unloading. Considering that the dryer continues to dry the air, the unloading is normal (only if the unloading is normal, The molecular sieve inside the dryer can be regenerated by removing moisture, and then restore the drying capacity), so the dryer loses its drying effect, and the high-pressure humid air discharged from the air compressor cannot be dried by the dryer, and directly enters the brake system, and a large amount of water enters the brake system. After the brake system is activated, the brake system is likely to freeze when the vehicle is driving in winter, resulting in brake failure, which poses a major safety hazard

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