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Pressure-limiting air release auxiliary brake valve device with air hole in piston tappet sleeve

A technology of auxiliary brake and valve device, applied in the direction of engine control, machine/engine, mechanical equipment, etc., can solve the problems such as the inability to adjust the pressure of the adjusting screw, the lag in the braking action of the auxiliary brake valve, and the easy deformation and fracture, and achieve effective Adjust the exhaust back pressure, increase the exhaust back pressure value, and cooperate with the effect of good sealing

Active Publication Date: 2015-12-30
ZHEJIANG EASUN PNEUMATIC SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The pressure-limiting and deflated auxiliary brake valve device in the prior art relies on the cylinder or the vacuum booster cylinder to push and pull the drive shaft to deflect to cause the butterfly plate to deflect. The drive shaft is inserted into the butterfly plate and fixed with rivets. , the rivet is easily deformed and broken under a large pressure, and the butterfly cannot realize its effective movement
[0004] Chinese Patent Nos. 200710137250.X and 200810126049.6 disclose a kind of exhaust brake, which includes a valve body, a disc, a support rod, a support sleeve, a pressure reducing valve, a spring and an adjusting screw. Release the excess pressure to ensure the stability of the working pressure, but when the pressure reducing valve is opened to adjust the pressure, it will cause hot gas to surround the spring, and the very high temperature will easily cause the spring to fail; moreover, the pressure reducing valve, the pressure plate and the adjusting screw have no guiding design, and the combination is not good. Stable, the offset of the pressure plate makes the adjustment screw unable to adjust the proper pressure; in addition, the pressure plate and the pressure reducing valve are easy to rotate, causing the spring torsion and causing the spring to break and fail
When the butterfly plate is closed and the engine exhaust gas is discharged into the intake chamber of the valve body, a part of the gas will inevitably enter the housing of the pressure regulating device, which hinders the reciprocating movement of the tappet and cannot effectively control the exhaust back pressure.
At the same time, due to the high temperature of the exhaust gas of the engine, the closed structure prevents the inner chamber of the pressure regulating device from dissipating heat, and the continuous high temperature will cause the pressure limiting spring to be deformed by heat, or even fail, and the braking effect of the auxiliary brake valve is seriously delayed, and the sensitivity is greatly reduced

Method used

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  • Pressure-limiting air release auxiliary brake valve device with air hole in piston tappet sleeve
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  • Pressure-limiting air release auxiliary brake valve device with air hole in piston tappet sleeve

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Embodiment Construction

[0035] Several preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The present invention covers any alternatives, modifications, equivalent methods and schemes made on the spirit and scope of the present invention. In order to provide the public with a thorough understanding of the present invention, specific details are set forth in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, well-known methods, procedures, processes, components, etc. have not been described in detail in order to avoid unnecessary confusion to the essence of the present invention.

[0036] Please refer to figure 1 The schematic diagram of the auxiliary brake valve of the present invention, the auxiliary brake valve is mainly compos...

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Abstract

The invention relates to a pressure-limiting and air-releasing auxiliary brake valve device with air holes in a piston tappet sleeve, comprising a valve body; a butterfly plate; a supporting device; a pressure regulating device; a pressure relief port device; the pressure regulating device includes a The piston tappet sleeve, the piston tappet sleeve includes: the piston tappet part and the piston sleeve part are integrally formed; the piston tappet part is a cylinder, and one end protrudes into the support groove through the support device to receive the pressure relief port device Different air pressures are transmitted to move, and the end inserted into the supporting groove is an end face; in addition, a pressure-stabilizing vent hole is opened on the valve body on the side of the air intake chamber, which communicates with the air intake chamber and the pressure regulating device. The invention has a compact structure, effectively controls the movement stroke of the piston tappet sleeve; improves the exhaust back pressure value at low and medium speeds of the engine; ensures that the resistance of the piston tappet sleeve during reciprocating motion is small, prevents the inner spring from failing due to high temperature, and makes the auxiliary The brake valve unit has a longer service life.

Description

technical field [0001] The invention relates to an auxiliary braking device, in particular to a pressure-limiting and air-releasing auxiliary braking valve device of a vehicle with air holes in a piston tappet sleeve. Background technique [0002] The pressure-limiting and air-leakage auxiliary brake valve device is an auxiliary braking device for vehicles, especially suitable for commercial vehicles. Vehicle brake failure to ensure driving safety. [0003] The pressure-limiting and deflated auxiliary brake valve device in the prior art relies on the cylinder or the vacuum booster cylinder to push and pull the drive shaft to deflect to make the butterfly plate deflect. The drive shaft is inserted into the butterfly plate and fixed with rivets, and the force of the drive shaft deflection acts on the rivet , The rivet is easily deformed and broken under a large compressive force, and the butterfly cannot realize its effective movement. [0004] Chinese Patent Nos. 2007101372...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D9/06
Inventor 褚志强吴和文王斌钱利春李清清陈磊磊
Owner ZHEJIANG EASUN PNEUMATIC SCI & TECH
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