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A system and method for engine control determine a spilled fuel quantity for use in controlling pressure of a common rail fuel system. In one embodiment, a spilled fuel estimate is determined based on rail pressure and engine speed. Another embodiment determines a spilled fuel estimate based on a le

A system and method for engine control determine a spilled fuel quantity for use in controlling pressure of a common rail fuel system. In one embodiment, a spilled fuel estimate is determined based on rail pressure and engine speed. Another embodiment determines a spilled fuel estimate based on a leakage quantity and a spill control quantity. The leakage quantity represents the amount of fuel leaked past the internal passages inside the injectors and is based on rail pressure alone. The spill control quantity is based on rail pressure and injector energizing time. The spill control quantity represents the fuel used to actuate the injector allowing the injected fuel into the cylinder during the combustion cycle. A more accurate determination of the quantity of fuel pumped based on spilled fuel and injected fuel may be used to improve the common rail pressure control, for example.

대표청구항 ▼

A system and method for engine control determine a spilled fuel quantity for use in controlling pressure of a common rail fuel system. In one embodiment, a spilled fuel estimate is determined based on rail pressure and engine speed. Another embodiment determines a spilled fuel estimate based on a le

A system and method for engine control determine a spilled fuel quantity for use in controlling pressure of a common rail fuel system. In one embodiment, a spilled fuel estimate is determined based on rail pressure and engine speed. Another embodiment determines a spilled fuel estimate based on a leakage quantity and a spill control quantity. The leakage quantity represents the amount of fuel leaked past the internal passages inside the injectors and is based on rail pressure alone. The spill control quantity is based on rail pressure and injector energizing time. The spill control quantity represents the fuel used to actuate the injector allowing the injected fuel into the cylinder during the combustion cycle. A more accurate determination of the quantity of fuel pumped based on spilled fuel and injected fuel may be used to improve the common rail pressure control, for example. then, switching said starter on after a time duration after said electric fuel pump and said electrical high pressure fuel pump are switched on. 4. The computer program product of claim 3, wherein said carrier is a read-only-memory. 5. A fuel supply system for an internal combustion engine including an engine of a motor vehicle, the engine including a starter and an ignition, the fuel supply system comprising: a pressure store; an electrical fuel pump and an electrical high pressure pump connected to said electrical fuel pump downstream thereof for pumping fuel into said pressure store; injection valves connected to said pressure store for injecting the fuel directly into said engine; and, means for first switching on said electrical fuel pump and said electrical high pressure pump together with said ignition for generating pressure in said pressure store adequate for injecting the fuel via said injection valves; and, means for then switching said starter on after a time duration after said electric fuel pump and said electrical high pressure fuel pump are switched on.