Brake positioning control method and positioning mechanism for engine

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 ...

Images