Quick-braking engine brake device

Abstract

The invention discloses a quick-braking engine brake device, which consists of an exhaust valve control mechanism, wherein the exhaust valve control mechanism consists of a driving force input cam, a cam driven wheel, a push rod, a rocker arm and a rocker arm shaft; one end of the push rod is connected with one end of the rocker arm; the cam driven wheel is arranged on the other end of the push rod; the driving force input cam is arranged outside the cam driven wheel; the other end of the rocker arm is provided with a horizontal driving piston and a vertical braking piston cylinder; a circular groove is formed on the middle part of the driving piston; a lateral side of the circular groove and the lateral surface, on the left of the circular groove, of the driving piston serve as a non-working face and a working face to contact the upper end face of the braking piston cylinder in a pressed way respectively; and a valve rod connector of an air exhaust valve is arranged below the braking piston cylinder. The driving force input cam transmits the power of an engine to the rocker arm periodically, the gap between the rocker arm and the valve rod connector of the air exhaust valve is controlled by an electromagnetic valve to realize switching between braking and normal working two states, so that the volume and weight of the brake are reduced, and high oil pressure and leakage, deformation and load fluctuation caused by the 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 a fast-braking 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 man...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a fast braking engine braking device, which will solve the problem that the overhead mode of the engine braking system in the prior art increases the height of the engine and the The technical problem of manufacturing cost, at the same time, it is necessary to solve the technical problem of large inertia and slow response of the braking system existing in the hydraulically driven engine brake

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