Patent ID: 8051648
Filing Date: 2011-11-08
Classification: F01N,F02B,F02F,Y02T

Abstract:
1. An exhaust manifold being integrally formed with a cylinder head, comprising: single exhaust outlet joining passages of at least two cylinders and exhausting exhaust gas that is exhausted from the at least two cylinders that are not adjacent to each other, wherein open periods during which exhaust valves of the at least two cylinders are open are not overlapped with each other wherein the passages include: wherein the first cylinder, the second cylinder, the third cylinder, and the fourth cylinder are sequentially disposed; wherein the second exhaust passage has a second exhaust outlet and the third exhaust passage has a third exhaust outlet; wherein the single exhaust outlet and the second and third exhaust outlets form an exhaust assemblage portion; wherein a water jacket is formed in the exhaust manifold, and is disposed to be adjacent to the first, second, third, and fourth exhaust passages; and wherein the water jacket extends to a spare space formed between the first exhaust passage and the fourth exhaust passage and the water jacket is adjacent to the second and third exhaust passages, the spare space displaced before the single exhaust outlet.