Engine brake device with lower manufacture cost

Abstract

The invention relates to an engine brake device with lower manufacture cost, comprising a vent valve control mechanism. The vent valve control mechanism comprises a driving force input cam, a cam driven wheel, a handspike, a rocker arm and a rocker arm shaft, wherein one end of the handspike is connected with one end of the rocker arm, the cam driven wheel is arranged at the other end of the handspike, the driving force input cam is arranged outside the cam driven wheel, a horizontal driving piston and a vertical brake plunger piston are arranged at the other end of the rocker arm, a circular groove is arranged in the middle of the driving piston, one side of the circular groove and one side of the driving piston at the left are used as a non-operation surface and an operation surface to compress and tightly contact with the upper end surface of the brake plunger piston, and a vent valve rod connecting piece is arranged below the brake plunger piston. Engine power is periodically transferred to the rocker arm by the driving force input cam, and a gap between the rocker arm and the vent valve rod connecting piece is controlled by utilizing an electromagnetic valve to switch two states of brake and normal operation, therefore, the size and the weight of the brake device are reduced without high oil pressure or the defects caused by the high oil pressure, such as leakage, deformation and load fluctuation.

Description

Technical field: [0001] The invention relates to the mechanical field, in particular to an engine braking device, in particular to an engine braking device with low manufacturing cost. 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 sys...

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a kind of engine braking device with low manufacturing cost, and the described engine braking device with low manufacturing cost 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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