Patent ID: 6283090
Filing Date: 2001-09-04
Classification: F01L,F02M

Abstract:
A method of operating an internal combustion engine having (i) a hydraulic supply circuit, (ii) a hydraulically-powered fuel injector assembly, (iii) a hydraulically-powered compression release brake assembly having (A) a first piston mechanically coupled to a first exhaust valve associated with said internal combustion engine and (B) a second piston mechanically coupled to a second exhaust valve associated with said internal combustion engine, and (iv) an engine control module electrically coupled to said hydraulically-powered fuel injector assembly and said hydraulically-powered compression release brake assembly, comprising the steps of:advancing a pressurized hydraulic fluid to said fuel injector assembly from said hydraulic supply circuit in response to an injection pulse generated by said engine control module so as to cause fuel to be injected into a cylinder associated with said engine when said engine is being operated in a drive mode of operation;advancing said pressurized hydraulic fluid to said compression release brake assembly from said hydraulic supply circuit in response to a brake pulse generated by said engine control module so as to selectively cause said first piston to be moved from a retracted position to an extended position when said engine is being operated in a brake mode of operation while said second piston remains in a retracted position; androtating a rocker arm about a rocker arm shaft so as to cause said rocker arm to contact said first exhaust valve thereby urging said first exhaust valve into an open exhaust valve position in response to movement of said first piston from said retracted position to said extended position.