F - Mech Eng,Light,Heat,Weapons – 02 – M
Patent
F - Mech Eng,Light,Heat,Weapons
02
M
123/98
F02M 25/06 (2006.01) F02B 31/00 (2006.01) F02D 21/08 (2006.01) F02M 25/07 (2006.01) F02B 1/04 (2006.01)
Patent
CA 1087471
ABSTRACT OF DISCLOSURE A spark ignition reciprocatory internal combustion engine with dual induction system and with EGR system is provided in which under engine operating conditions when only a primary throttle valve opens, a fluid charge from a primary induction system will swirl around the cylinder axis, while, under engine operating condition when both the primary and secondary throttle valves open, a fluid charge from a secondary induction system will impede and reduce swirling motion of fluid charge from the primary induction system. With the EGR system, the recirculation of exhaust gas is effected through the primary induction system under the engine operating condition with low and intermediate loads. At high loads, the recirculation of exhaust gas is effected not only through the primary induction system but also through the secondary induction system. For this end the EGR system includes a load responsive valve which will permit admission of exhaust gas into the secondary induction system at a position downstream of the second- ary throttle valve in response to loads of the engine.
315442
Etoh Yukihiro
Tanaka Toshiaki
Nissan Motor Co. Ltd.
Robic Robic & Associes/associates
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