초록 ▼

An engine retarding system of a gas compression release type is provided for an engine equipped with a high pressure hydraulic fluid supply system. The retarder comprises an hydraulically driven exhaust valve actuator, a solenoid actuated servo valve controlling the flow of high pressure hydraulic f

An engine retarding system of a gas compression release type is provided for an engine equipped with a high pressure hydraulic fluid supply system. The retarder comprises an hydraulically driven exhaust valve actuator, a solenoid actuated servo valve controlling the flow of high pressure hydraulic fluid from the supply to the actuator and an electronic controller which provides a signal to operate the solenoid as a function of the engine speed and crankshaft position.

대표청구항 ▼

An engine retarding system of a gas compression release type comprising a multi-cylinder four cycle internal combustion engine having a crankshaft, engine piston means associated with said crankshaft, exhaust valve means associated with each cylinder of said engine, high pressure hydraulic fluid sup

An engine retarding system of a gas compression release type comprising a multi-cylinder four cycle internal combustion engine having a crankshaft, engine piston means associated with said crankshaft, exhaust valve means associated with each cylinder of said engine, high pressure hydraulic fluid supply means driven by said engine, retarder housing means, hydraulically driven actuator means movable between first and second positions in said retarder housing means and associated with said exhaust valve means to open said exhaust valve means, said actuator means being movable between a first position out of contact with said exhaust valve means and a second position opening said exhaust valve means, electronic controller means affixed to said engine and programmed to deliver a signal in response to the speed and position of said crankshaft, and solenoid actuated servo valve means having a drain outlet and positioned in said retarder housing means between said high pressure hydraulic fluid supply means and said actuator means, said servo valve means movable by said solenoid between a closed position wherein said servo valve means communicates between said actuator means and said drain outlet and an open position wherein said servo valve means communicates between said actuator means and said high pressure hydraulic fluid supply means.