Patent ID: 8978371
Filing Date: 2015-03-17
Classification: F01N

Abstract:
1. A cooling adapter provided between a cylinder head of an internal combustion engine and an exhaust pipe of the internal combustion engine in such a manner as to connect the cylinder head and the exhaust pipe to each other, comprising: a plurality of exhaust passages provided in parallel with one another to cause an exhaust gas from the cylinder head to flow to the exhaust pipe; a water jacket formed around an entirety of the respective exhaust passages and among the respective exhaust passages to cause a cooling liquid to flow to exchange heat with an exhaust gas flowing through the plurality of the exhaust passages; a single inlet portion configured to cause the cooling liquid to flow into the water jacket; and an outlet portion configured to cause the cooling liquid to flow out from inside the water jacket, wherein the inlet portion is so provided as to open to the water jacket at a position close to the cylinder head and the inlet portion is so provided as to open to the water jacket at a position offset from one of the exhaust passages and the inlet portion is so provided as to open at a position corresponding to a gap between a first end exhaust passage and an adjacent second exhaust passage of the plurality of exhaust passages at one end in a direction in which the plurality of the exhaust passages are arranged, a third end exhaust passage of the plurality of exhaust passages positioned opposite of the first end exhaust passage and the second exhaust passages; the outlet portion is so provided as to open at a position close to the third end exhaust passage located at the other end in the direction in which the plurality of the exhaust passages are arranged.