초록 ▼

To protect a plastic intake manifold of an internal combstion engine from heat possessed by exhaust gas recirculation gas, a cooling device is arranged between the plastic intake manifold and an exhaust gas recirculation valve. The cooling device cools the exhaust gas recirculation gas by means of a

To protect a plastic intake manifold of an internal combstion engine from heat possessed by exhaust gas recirculation gas, a cooling device is arranged between the plastic intake manifold and an exhaust gas recirculation valve. The cooling device cools the exhaust gas recirculation gas by means of a coolant. A gas discharge part of the cooling device constitutes a pipe portion which penetrates through an exhaust gas inlet hole of the intake manifold keeping a given space between an outer wall of the pipe portion and an inner wall of the exhaust gas inlet hole. The pipe portion may be a leading end portion of an exhaust gas recirculation pipe extending from an exhaust system of the engine.

대표청구항 ▼

[ What is claimed is:] [1.] An exhaust gas recirculation system for use with an internal combustion engine having a plastic intake passage, comprising:a connecting base formed on said plastic intake passage, said connecting base having an exhaust gas inlet hole connected with the interior of said in

[ What is claimed is:] [1.] An exhaust gas recirculation system for use with an internal combustion engine having a plastic intake passage, comprising:a connecting base formed on said plastic intake passage, said connecting base having an exhaust gas inlet hole connected with the interior of said intake passage;an exhaust gas recirculation valve through which a metered amount of exhaust gas produced by the engine is fed back to the interior of said plastic intake passage; anda cooling device arranged between said connecting base and said exhaust gas recirculation valve, said cooling device including mutually separated first and second passages, said first passage connecting an outlet opening of said exhaust gas recirculation valve to said exhaust gas inlet hole of said connecting base, said second passage being shaped to surround said first passage and adapted to flow therein a coolant,wherein said first passage of said cooling device includes a pipe portion which penetrates through said exhaust gas inlet hole keeping a given space between an outer wall of said pipe portion and an inner wall of said exhaust gas inlet hole, andwherein said cooling device comprises front and rear housing members which are united in such a manner that said first passage passes through both said front and rear housing members.