| 摘要 |
A reset type rocker braking method and device are provided. A braking piston hole (190) and an oil discharge piston hole (183) which are connected with a braking oil supply channel are arranged inside a rocker (210), and an oil discharge channel (219) is arranged between the braking piston hole (190) and the oil discharge piston hole (183). When the rocker (210) is driven by a braking boss of a cam (230), an exhaust valve is opened to realize braking by a braking piston (160) inside the braking piston hole (190) of the rocker (210). When the rocker (210) is driven by an exhaust boss (220) of the cam (230), the rocker (210) moves to drive an oil discharge piston (170) in the oil discharge piston hole (183) to open the oil discharge channel (219) to discharge oil, the braking piston (160) in the braking piston hole (190) moves from a stretching position to a retracting position, and the lifting stroke of the exhaust valve is reduced by means of resetting to form a valve lift curve of movement of a conventional exhaust valve without an engine for braking. According to the reset type rocker braking method and device, an engine braking mechanism and a reset oil discharge mechanism are integrated in the rocker, and the reset type rocker braking device is simple in design and compact in structure, reduces the weight and the height of an engine, increases braking power of the engine, and improves reliability and durability of the engine in operation. |
