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Brake positioning control method and positioning mechanism for engine

A technology of engine braking and positioning control, which is applied in the direction of engine control, engine components, machine/engine, etc. It can solve the problems of large space and unbalanced switching between the two states of the engine, and achieves easy installation and portability and small footprint Effect

Active Publication Date: 2011-11-09
SHANGHAI UNIVERSOON AUTOPARTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a control method for engine brake positioning, which solves the problem that the spring installation position of the engine brake positioning mechanism in the prior art takes up a large space and cannot achieve two engine brakes in a balanced manner. Technical issues with state switching

Method used

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  • Brake positioning control method and positioning mechanism for engine
  • Brake positioning control method and positioning mechanism for engine
  • Brake positioning control method and positioning mechanism for engine

Examples

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Comparison scheme
Effect test

Embodiment 1

[0030] like figure 2 Shown: the engine brake positioning control method of the present invention includes a process of changing the position of the brake rocker arm in the engine brake, the engine includes an exhaust valve actuator and an exhaust valve system, and the engine brake It also includes the driving mechanism of brake cam, cam follower, rocker shaft and engine brake, wherein, in the process of changing the position of the brake rocker arm in the engine brake, when the engine is required to work normally, the One end of the brake rocker arm is separated from the brake cam, so that the other end of the brake rocker arm is separated from a brake pad. When engine braking is required, the gap between the brake rocker arm and the brake cam is eliminated, and the brake rocker The gap between the arm and the brake pad.

[0031] Further, a torque is set on the brake rocker arm, and the torque causes one end of the brake rocker arm to separate from the brake cam, and the oth...

Embodiment 2

[0037] like image 3 As shown, the difference between this embodiment and the first embodiment is that the pressure ball 122 is replaced by a pressure block 123, and a hole is opened in the middle of the brake rocker arm 2052 along its radial direction, and the inner end of the hole reaches the rocker shaft, and the pressure The block 123 is set in the hole and is in contact with the rocker shaft 2052, the spring 1982 is set in the hole, the outer end 1982 of the spring is fixedly connected with the brake rocker arm 2052, the inner end 1982 of the spring is in contact with the pressing block 123, and the pressing block 123 directly Acts on the cylindrical surface of the rocker shaft 2052. In this embodiment, the principle of brake positioning is to rely on the frictional damping between the positioning pressure block 123 and the rocker shaft 2052 for automatic positioning. When the engine is turned from the braking state to the non-braking state, the rocker arm 2102 will find...

Embodiment 3

[0039] like Figure 4 As shown, the present embodiment also adopts the automatic positioning of friction damping. The positioning pressure block 126 is in contact with the side surface 125 of the brake rocker arm 2102, and the brake spring 1982 is installed on the rocker arm shaft 1052, between the brake rocker arm 2102 and the intake rocker arm 2103, and the spring is in a compressed state.

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Abstract

The invention discloses a brake positioning control method for an engine. When an engine needs to normally work, one end of a braking rocker arm is separated from a braking cam, and the other end of the braking rocker arm is separated from a braking pad. When the engine needs to be braked, gaps between the breaking rocker arm and the braking cam and between the breaking rocker arm and the braking pad can be eliminated. The invention also discloses a positioning mechanism for the engine brake. The a positioning mechanism is composed of a braking cam, a braking rocker arm, a rocker arm shaft, a braking press cake, a vent valve and a braking rocker arm positioning mechanism, wherein the braking rocker arm is installed on the rocker arm shaft in a swinging way; one end of the braking rocker arm approaches to the braking cam, and the other end of the braking rocker arm approaches to the braking press cake; and the braking press cake is a braking piston, or the elephant foot pat of an engine, a valve bridge and a rocker arm. The positioning mechanism is integrated in the vent valve system of the engine to prevent the braking rocker arm, the braking cam, the braking press cake and other engine components from being suddenly collided, thereby realizing stably switch between the braking state and normal working state of the engine. The engine with the braking rocker arm positioning structure occupies small area and is convenient to install and carry.

Description

Technical field: [0001] The invention relates to the field of automobiles, in particular to the braking technology of an automobile engine, in particular to an engine brake positioning control method and a positioning mechanism. Background technique: [0002] In the prior art, the method of using an internal combustion engine as a brake is well known. This is achieved by temporarily converting the engine to a compressor. Said conversion will cut off the fuel, open 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, compressed gas, It cannot be returned to the engine piston during the subsequent expansion stroke, but is dissipated through the engine's exhaust and cooling system. The end result is effective engine braking that slows the vehicle. [0003] The inventor discloses an integrated engine brake with a dedicated ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L13/06F02D13/04
Inventor 杨洲柯恩九朱汝杰
Owner SHANGHAI UNIVERSOON AUTOPARTS CO LTD
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