| 摘要 |
A process and apparatus are provided to increase the retarding horsepower of a compression release engine retarder driven from the exhaust valve pushtube (122) or the fuel injector pushtube, the apparatus including a plenum (142) communicating with the exhaust valve slave piston (48) and the master piston (128) driven by a remote exhaust valve pushtube (122) or the fuel injector pushtube, a trigger check valve (154) located between the master piston (128) and exhaust valve slave piston (48) to deliver energy,resulting from the initial motion of the master piston (128) to the plenum (142). At a predetermined point in the travel of the master piston (128), the trigger check valve (154) is opened by the master piston (128) to permit the delivery of the energy stored in the plenum (142) to the slave piston (48), additional pumping capability being provided by a second master piston (138) while a control check valve (182), communicating with the second master piston (138) limits the intake of hydraulic fluid into the system, after working pressures have been attained, to that which may leak from the system. The process includes cyclically storing energy in the plenum (142), releasing the stored energy from the plenum (142) at a predetermined point in the travel of the master piston (128) driven by the exhaust or fuel injector pushtube and directing the stored energy to the slave piston (48) whereby the exhaust valve is opened rapidly at a predetermined time. |
