Patent ID: 6807938
Filing Date: 2004-10-26
Classification: F02D

Abstract:
An internal combustion engine comprising:a fueling system that uses hydraulic fluid for forcing fuel into engine combustion chambers; an engine control system for controlling various aspects of engine operation including fueling of the engine combustion chambers by the fueling system and the pressure of hydraulic fluid that forces fuel into the combustion chambers; and a mechanism for retarding the engine in consequence of the control system activating an engine retarder and for discontinuing engine retarding upon deactivation of the engine retarder, wherein in consequence of deactivation of the engine retarder, the engine control system initially limits engine fueling to a limit value so long as the difference between a desired pressure for the hydraulic fluid and actual pressure of the hydraulic fluid equals or exceeds a value correlated both with the speed at which the engine is running and with governed engine fueling appropriate for the load on the engine at the engine running speed, but once the difference between the desired hydraulic fluid pressure and actual hydraulic fluid pressure ceases to not equal or exceed a value correlated both with engine running speed and with governed engine fueling appropriate for the engine load at the engine running speed, the control system begins to increase the limit value.