| 摘要 |
PURPOSE:To efficiently distribute supercharged air to each cylinder, by constituting a supercharger with a compound positive displacement pump having plural delivery ports, connecting each delivery port to a different cylinder through respectively independent auxiliary intake system and preventing a supercharge change. CONSTITUTION:In case of application to a 6-cylinder engine, an intake system is constituted by main and auxiliary intake systems 3, 4, and the auxiliary intake system 4 is formed by equipping a manifold passage 14, the upstream end of which is communicated to a place in the vicinity of the downstream branch part of a manifold passage 5 in a main intake passage 8 of the main intake system 3. Branch passages 15a, 15b are divided from the manifold passage 14, and a supercharger 18, consisting of a compound positive displacement pump, is arranged across these passages 15a, 15b. Then upstream and downstream sides of the branch passages 15a, 15b are connected to intake ports 19a, 19b and delivery ports 20a, 20b provided in symmetrical positions of the supercharger 18. Further downstream ends of the branch passage 15a, 15b are connected to each cylinder 1a-1f through each independent branch passage 16a-16f. |
