Braking device of engine

Abstract

The invention relates to a braking device of an engine. The braking device consists of a control mechanism for an exhaust valve, wherein the control mechanism for the exhaust valve 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 at 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 plunger; an annular groove is formed in the middle of the driving piston; the side face of the annular groove and the side face of the driving piston on the left side of the annular groove, which serve as a non-operative surface and an operative surface, are compressed and contacted with the upper end face of the braking plunger; and a valve rod connecting piece of the exhaust valve is arranged on the lower side of the braking plunger. The driving force input cam periodically transmits the power of the engine to the rocker arm, the gap between the rocker arm and the valve rod connecting piece of the exhaust valve is controlled by an electromagnetic valve, braking and normal working states can be switched, the volume and weight of a brake are reduced, and high oil pressure and leakage, deformation and load fluctuation which are caused by the high oil pressure do not exist.

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...

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

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