Air intake apparatus of multicylinder internal combustion engine

Abstract

Abstract PURPOSE:To allow a strong sidturbance to be generated in a combustion chamber when necessary, securing a high filling efficiency in high speed high load operation with a simple structure by positively heating a common communication passage by use of exhaust gas. CONSTITUTION:The mixed gas which passes through a common communication passage 29 is heated by exhaust gas through a thin wall 31 and thus the vaporization of fuel is accelerated. As a communication branched passage 30b is directed to the slit formed between an intake valve 3b and the valve seat of the valve 3b, the mixed gas gushed out from the communication branched passage 30b gushes out into an internal combustion chamber 10, passing through the slit, and allows swirling flow to be generated in the combustion chamber 10. As a result of this, the speed of combustion increases sharply, and stable combustion can be obtained. Further, due to the heating action of exhaust gas, idling fuel is vaporized speedily, and the bad influence to the inner wall surface of the common communication passage 29 due to the EGR gas is prevented.

Inventors

• 👤 Katsuhiko Motosugi
• 👤 Shuhei Toyoda
• 👤 Masaru Takahashi

Bibliographic Details