F - Mech Eng,Light,Heat,Weapons – 02 – D
Patent
F - Mech Eng,Light,Heat,Weapons
02
D
341/38.13
F02D 29/00 (2006.01) F02D 28/00 (2006.01) F02D 41/14 (2006.01) F02D 41/18 (2006.01)
Patent
CA 1172731
- 12 - ABSTRACT A method for improving fuel control in an inter- nal combustion engine employs a pressure ratio to deter- mine the engine's actual volumetric efficiency continuously as the engine is operating. The air/fuel ratio of the engine's combustible mixture is affected by the volumetric efficiency. The volumetric efficiency varies during engine operation. Determination of the actual volumetric efficiency on a real-time basis allows greater accuracy in fuel metering. The pressure ratio used in the determination of the volumetric efficiency is the ratio of the intake and exhaust pressures or the inverse of this ratio. The ratio of pressures is combined with a second factor representative of the forces acting upon the air or air/fuel mixture inducted into the engine. The pressure ratio may be ob- tained without actual measurement of the pressure in the engine's exhaust conduit.
357122
Hoard John W.
Tuttle Richard R.
Ford Motor Company Of Canada Limited
Sim & Mcburney
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