Heat exchangers of multiple cylinder internal combustion engine

Details Heat exchangers of multiple cylinder internal combustion engine Heat exchangers of multiple cylinder internal combustion engine

2006-06-06

2006-06-06

Denion, Thomas (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

Exhaust gas or exhaust system element heated, cooled, or...

C060S321000

Reexamination Certificate

active

07055315

ABSTRACT:
First heat exchangers (H4,H3,H2) are disposed within an exhaust port (18), within a pre-catalytic device (34), and on the downstream of a main catalytic device (35); the exhaust port (18), the pre-catalytic device (34), and the main catalytic device (35) being provided in each exhaust passage (33) of a multicylinder internal combustion engine. These first heat exchangers (H4,H3,H2) are independently provided for each of the exhaust passages (33), and a second heat exchanger (H1) is disposed in a section where these exhaust passages (33) are combined. Since the first heat exchangers (H4,H3,H2) are disposed on the upstream side of the exhaust passage (33), high heat exchange efficiency can be obtained by high temperature exhaust gas, and, moreover, the occurrence of exhaust interference can be avoided, thereby preventing any decrease in the output of the internal combustion engine.

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