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Improved structure of engine brake device

A technology of engine braking and braking column, which is applied in the direction of engine components, machines/engines, valve devices, etc., can solve the problems of increasing volume and weight, large inertia of the braking system, and reducing hydraulic flexibility, etc., to achieve volume reduction and Effects of weight, cost reduction, and requirement reduction

Inactive Publication Date: 2011-04-06
SHANGHAI UNIVERSOON AUTOPARTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to reduce hydraulic flexibility, a large diameter hydraulic piston must be used, increasing volume and weight
Moreover, it takes a long time for the oil flow to extend or retract the large-diameter piston, resulting in large inertia and slow response of the braking system

Method used

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  • Improved structure of engine brake device
  • Improved structure of engine brake device
  • Improved structure of engine brake device

Examples

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Embodiment 1

[0025] Such as figure 1 , figure 2 , image 3 , Figure 4 and Figure 5As shown, the improved structure 100 of an engine braking device of the present invention is composed of an exhaust valve control mechanism 2002, wherein the exhaust valve control mechanism 2002 is composed of a driving force input cam 2302, a cam follower 2352, Push rod 2012, rocker arm 2102 and rocker arm shaft 205 constitute, the middle part of described rocker arm 2102 is arranged on the rocker arm shaft 205, and one end of described push rod 2012 is connected with one end of rocker arm 2102, and described cam The driven wheel 2352 is arranged in the other end of the push rod 2012, and the driving force input cam 2302 is arranged outside the cam follower 2352, and the rotation circle of the protrusion in the driving force input cam 2302 intersects the outer circumference of the cam follower 2352 A bias return spring 1982 is provided on the outside of the rocker arm 2102, a fluid channel 214 is prov...

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PUM

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Abstract

The invention relates to an improved structure of an engine brake device, which comprises an exhaust valve control mechanism, wherein the exhaust valve control mechanism comprises a drive force input cam, a cam driven wheel, a rocking arm and a rocking arm shaft, the cam driven wheel is arranged at the other end of a push rod, the drive force input cam is arranged outside the cam driven wheel, the other end of the rocking arm is provided with a vertical valve gap regulating piston, a horizontal drive piston and a vertical brake plunger piston are arranged in the valve gap regulating piston, the middle of the drive piston is provided with a circular groove, the side surface of the circular groove and the side surface of the drive piston at the left side of the circular groove are used as anon working face and a working face which are in press and contact with the upper end face of the brake plunger piston, and an exhaust valve rod connecting member is arranged below the brake plunger piston. The drive force input cam is used for transferring driving force of the engine to the rocking arm periodically, the switching of two states of brake and normal work is realized by using an electromagnetic valve to control a gap between the rocking arm and the exhaust valve rod connecting member, the volume and the weight of a brake are reduced, and high oil pressure and leakage, deformation and load fluctuation caused by high oil pressure are avoided.

Description

Technical field: [0001] The invention relates to the mechanical field, in particular to an engine braking device, in particular to an improved structure of the engine braking device. Background technique: [0002] In the prior art, the method of using the internal combustion engine as a braking means is well known, and only the engine needs to be temporarily converted into a compressor. This conversion cuts off the fuel and opens the exhaust valve at or near the end of the engine piston compression stroke, allowing the compressed gas (air during braking) to be released. The energy absorbed by the engine during the compression stroke cannot be used The subsequent expansion stroke returns to the engine piston, but is dissipated through the engine's exhaust and cooling system. The end result is effective engine braking that slows the vehicle. [0003] A precedent for an engine brake is disclosed in US Patent No. 3,220,392 to Cummins, according to which an engine braking syste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L13/06
Inventor 杨洲
Owner SHANGHAI UNIVERSOON AUTOPARTS CO LTD
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