Internal combustion engine

Abstract

Abstract PURPOSE: To provide an internal combustion engine of the type in which two suction valves are disposed side by side on the upper surface of combustion chamber for supplying mixture having different air-fuel ratio, wherein velocity of flow of these two mixtures and weight of air contained therein are controlled appropriately to produce a stable laminar flow of these two different mixtures. CONSTITUTION: Mixture supply sources 10, 13 for supplying a relatively rich mixture and a relatively lean mixture are connected respectively to a first and a second suction ports 3, 5 which are disposed symmetrically in the upper surface of combustion chamber 1. Here, through control of a first and a second throttle valves 8, 11 disposed in respective mixture supplying sources 10, 13, amount of suction air at least in low-load operational range of engine is determined as follows. That is, providing that weight of air introduced from suction ports 3, 5 is G 1 , G 2 , respectively, G 2 is made greater than G 1 . Further, velocity of rich mixture supplied from suction port 3 is made relatively low whereas that of lean mixture supplied from suction port 5 is made relatively high. With such an arrangement, it is enabled to produce a stable laminar flow of two different mixtures and thus to purify exhaust gas effectively. COPYRIGHT: (C)1980,JPO&Japio

Inventors

• 👤 Shizuo Yagi
• 👤 Junji Otani
• 👤 Isao Fujii
• 👤 Hiroshi Kogure

Bibliographic Details