F - Mech Eng,Light,Heat,Weapons – 02 – M
Patent
F - Mech Eng,Light,Heat,Weapons
02
M
F02M 69/54 (2006.01) F02D 41/30 (2006.01) F02M 37/08 (2006.01)
Patent
CA 2163288
A fuel delivery system and method for providing fuel to a fuel injected engine using an engine control unit (ECU) to determine engine fuel demand and adjust fuel pump operation accordingly to supply at least as much fuel as demanded by the engine. The ECU determines a fuel pump control signal based upon fuel demand and applies the signal to a fuel pump driver that controllably drives the pump in response to the control signal. The ECU determines fuel demand by monitoring engine operation and calculates a control signal that controls the duration of time the fuel injector stays open during an upcoming intake stroke of engine operation. The pump control signal is proportional to engine fuel demand multiplied by a constant that ensures more fuel will be available for delivery to the injector than demanded by the engine. Engine fuel demand is proportional to the duration of time the injector will stay open multiplied by the engine speed. Preferably, if the calculated pump signal is less than a minimum that would cause the pump to operate below a desired minimum duty cycle, the control signal is set at the minimum to ensure sufficient excess fuel will be available to meet any sharp increases in demand. If the calculated signal is greater than the maximum pump duty cycle, the signal is set at the maximum to avoid damaging the pump. If the calculated signal is between the minimum and maximum limits, the control signal is set to the calculated value.
Learman William L.
Roche Ronald H.
Werner Matthew L.
Marks & Clerk
Walbro Corporation
LandOfFree
Engine demand fuel delivery system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Engine demand fuel delivery system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Engine demand fuel delivery system will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1600560