F - Mech Eng,Light,Heat,Weapons – 02 – D
Patent
F - Mech Eng,Light,Heat,Weapons
02
D
F02D 41/30 (2006.01) F02D 35/02 (2006.01) F02D 41/14 (2006.01) F02D 41/18 (2006.01) F02M 51/00 (2006.01) F02B 1/04 (2006.01) F02B 3/06 (2006.01)
Patent
CA 2065345
System for controlling a spark ignition engine to maxi- mize fuel efficiency over its entire range of operating conditions. The system includes apparatus (20) for controlling the amount of fuel delivered to the engine and apparatus (26) for measuring the internal cylinder pressure in at least one cylinder of the en- gine. Apparatus is provided for estimating the air mass entering the engine and computing apparatus (20) calculates the engine efficiency from the amount of fuel delivered, the internal cylin- der pressure and the estimated air mass entering the engine. In one embodiment, efficiency is measured by calculation of the approximate indicated specific fuel consumption. Apparatus (20) is provided for varying the amount of fuel delivered to the engine to minimize the indicated specific fuel consumption over the entire range of operating conditions of the engine. In this embodiment, apparatus is provided which is responsive to a de- sired engine power output beyond wide open throttle plate and apparatus is provided for delivering a greater quantity of fuel be- yond the wide open throttle plate posiiton maximum efficiency point.
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