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Engine braking device

An engine braking and driving force technology, applied in engine components, machines/engines, valve devices, etc., can solve the problems of large inertia of the braking system, increased engine height and manufacturing cost, slow response, etc., to reduce costs and reduce costs. Small size and weight, the effect of reducing requirements

Active Publication Date: 2013-05-01
SHANGHAI UNIVERSOON AUTOPARTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a kind of engine braking device, described this kind of engine braking device will solve the technical problem that the overhead mode of the engine braking system in the prior art increases the height of the engine and the technical problem of manufacturing cost, simultaneously needs Solve the technical problems of large inertia and slow response of the braking system existing in hydraulically driven engine brakes

Method used

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  • Engine braking device
  • Engine braking device
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Embodiment 1

[0025] Such as figure 1 , figure 2 , image 3 , Figure 4 and Figure 5As shown, an engine braking device 100 of the present invention is composed of an exhaust valve control mechanism 200, wherein the exhaust valve control mechanism 2002 is composed of a driving force input cam 2302, a cam follower 2352, a rocker arm 2102 Constituted with the rocker shaft 205, the middle part of the rocker arm 2102 is arranged on the rocker shaft 205, the driving force input cam 2302 is arranged outside the cam follower 2352, and the rotation of the protrusion in the driving force input cam 2302 The circumference 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 passage 214 is arranged in the rocker arm 2102, and a fluid passage 211 is arranged axially in the rocker arm shaft 205 1. A radial hole 212 is arranged along a radius, and the radial hole 212 communicates with the fluid channel 211. A...

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Abstract

The invention relates to a novel engine braking device which comprises an exhaust valve control mechanism, wherein the exhaust valve control mechanism comprises a driving force input cam, a cam driven wheel, a rocker arm and a rocker arm shaft; the driving force input cam is arranged outside the cam driven wheel; the other end of the rocker arm is provided with a vertical guide piston, a horizontal drive piston and a vertical braking plunger; two connecting rods are arranged in the guide piston; the convex spherical surface at the upper end of the upper connecting rod is matched with the concave spherical surface of a valve clearance adjusting screw; the convex spherical surface at the lower end of the lower connecting rod is matched with the concave spherical surface of the braking plunger; and a valve rod connecting element of an exhaust valve is arranged below the braking plunger. The driving force input cam periodically transfers the power of an engine to the rocker arm and controls a clearance between the rocker arm and the valve rod connecting element of the exhaust valve by utilizing an electromagnetic valve, thereby realizing the switch of two states of brake and normal work, reducing the size and the weight of a brake and having no high oil pressure and leakage, deformation and load fluctuation caused by the high oil pressure.

Description

Technical field: [0001] The invention relates to the mechanical field, in particular to a braking device for an engine, in particular to an 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 system has been manufactu...

Claims

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Application Information

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