F - Mech Eng,Light,Heat,Weapons – 02 – M
Patent
F - Mech Eng,Light,Heat,Weapons
02
M
123/54, 123/98
F02M 13/04 (2006.01) F02B 31/08 (2006.01) F02M 35/108 (2006.01) F02B 1/04 (2006.01) F02B 31/00 (2006.01) F02M 35/10 (2006.01)
Patent
CA 1098392
ABSTRACT OF THE DISCLOSURE A spark ignition fuel injection reciprocatory internal combustion engine with dual induction system is provided which has within a cylinder head a primary intake passage to direct air fuel mixture charge into a cylinder to swirl therein and a secondary intake passage to direct air charge into the cylinder in such a direction as to impede the swirling motion of the air fuel mixture charge, thereby to maintain the volumetric efficiency of the engine at a sufficiently high level. A fuel injector is so positioned as to discharge fuel into the primary intake passage. An air flow sensor is provided upstream of primary and secondary throttle valves to detect the total of flow of induction air fed to the engine so that fuel is discharged at a rate proportional to the total induction air flow. Under engine operating conditions when only the primary throttle valve opens, air fuel mixture charge will swirl at a sufficiently high rate as to enhance evaporation and dispersion of fuel droplets. Under engine operating conditions when both the primary and secondary throttle valves open, air fuel mixture charge issuing from the primary intake passage is enriched and air charge from the secondary intake passage will impede swirling motion of enriched air fuel mixture charge from the primary intake passage, thereby to enhance evaporation and dis- persion of fuel droplets.
318079
Etoh Yukihiro
Nakagawa Yasuhiko
Nakai Meroji
Nakajima Ryoji
Nissan Motor Co. Ltd.
Robic Robic & Associes/associates
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