Mounting structure of EGR valve for internal combustion engine

Details Mounting structure of EGR valve for internal combustion engine Mounting structure of EGR valve for internal combustion engine

1989-07-12

1990-07-03

Okonsky, David A.

Internal-combustion engines

Multiple cylinder

123568, F02M 3510

Patent

active

049381768

ABSTRACT:
A mounting structure for mouting an EGR valve on an intake maniford of an internal combustion engine is disclosed. The intake manifold includes a flange in which boltholes having internal threads are formed. The EGR valve is mounted on the flange by means of bolts. The flange includes a coolant passage inside. Coolant flows into this coolant passage from a cooling system of the engine to cool the boltholes effectively so as to prevent the bolts from loosening due to thermal fatigue of the internal thread portions caused by the high temperatures of recirculated exhaust gas.

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patent: 4440120 (1984-04-01), Butler
patent: 4466389 (1984-08-01), Arkus-Duntov
patent: 4513698 (1985-04-01), Senga et al.
patent: 4516538 (1985-05-01), Arakawa et al.
patent: 4708097 (1987-11-01), Hatamura et al.

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