FIXED CHAIN TYPE ENGINE BRAKING DEVICE

摘要

A fixed chain type engine braking device (100) includes a brake box (2102), a driving mechanism and a braking mechanism. One upright blind hole (190) and one horizontal blind hole (260) are placed in the brake box, and the upright blind hole intersects the horizontal blind hole orthogonally. The driving mechanism includes a rolling ball (175) and/or a driving piston (164) placed in the horizontal blind hole, the braking mechanism includes a braking plunger (160) placed in the upright blind hole. A fluid passage (214) is placed in the brake box, and the fluid passage is communicated with the entry of the horizontal blind hole. The braking plunger has a upper limit position and a lower limit position in the upright blind hole, when the braking plunger is at the upper limit position, the top of the braking plunger enters into the horizontal blind hole, and when the braking plunger is at the lower limit position, the top of the braking plunger deviates from the horizontal blind hole. The engine braking device does not use a hydraulic braking control valve, so the design is simplified, and the braking reaction time is reduced.