Braking device of toothed solid chain type engine

Abstract

The invention discloses a braking device of a toothed solid chain type engine, and the braking device comprises a first plunger piston and a second plunger piston arranged in vertical plunger piston holes, and a plunger piston rotation driving mechanism. The lower end surface of the first plunger piston and the upper end surface of the second plunger piston are respectively provided with a tooth surface; the tooth surfaces are matched with each other; a matching non-operating position and an operating position exist between teeth of the two matched tooth surfaces; at the non-operating position, tooth crests of teeth of the first plunger piston are aligned with tooth roots of teeth of the second plunger piston; at the operating position, the tooth crests of the teeth of the first plunger piston are aligned with tooth crests of the teeth of the second plunger piston; and the plunger piston rotation driving mechanism enables the two matched tooth surfaces of the two plunger pistons to rotate between the non-operating position and the operating position. By using the braking device of the toothed solid chain type engine, the height, the volume and the weight of the engine cannot be increased or can be increased less; the design is simplified; the cost is decreased; the braking response time is reduced; the solid chain interlinkage is adopted; the lifting of a braking valve can adopt a smaller value; and the requirements on a gap of a piston and an air valve of the engine can be decreased.

Description

Technical field:

[0001] The invention relates to the field of machinery, in particular to the field of vehicle engine braking, in particular to a tooth-shaped fixed-chain 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. The fuel is cut off during the conversion process, and the exhaust valve is opened at or near the end of the engine piston compression stroke to allow the compressed gas (air during braking) to be released. The energy absorbed by the engine during the compression stroke cannot be 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 braking device is disclosed in US Patent No. 3,220,392 to Cummins, an engi...

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