초록 ▼

Two embodiments of water cooled internal combustion engines employing an EGR system. The embodiments also utilize direct cylinder injection. The EGR system is formed integrally within a housing assembly that also forms a portion of the cooling system for the engine and particularly a return coolant

Two embodiments of water cooled internal combustion engines employing an EGR system. The embodiments also utilize direct cylinder injection. The EGR system is formed integrally within a housing assembly that also forms a portion of the cooling system for the engine and particularly a return coolant manifold. In this way, the exhaust gas recirculation valve can be cooled and its life and performance improved. In addition, this reduces the amount of heat added to the intake system and thus improves the volumetric efficiency of the engine.

대표청구항 ▼

[ What is claimed is:] [1.]1. An internal combustion engine having a liquid cooled engine body, an exhaust manifold for collecting exhaust gases from said engine body and discharging them to the atmosphere through an exhaust system, an induction system for inducting air into said engine body for mix

[ What is claimed is:] [1.]1. An internal combustion engine having a liquid cooled engine body, an exhaust manifold for collecting exhaust gases from said engine body and discharging them to the atmosphere through an exhaust system, an induction system for inducting air into said engine body for mixture with fuel and combustion therein, said engine body cooling jacket being in fluid communication with a coolant source for delivering coolant to said engine body cooling jacket and receiving coolant to said coolant source, said fluid communication being provided at least in part by an external conduit which is formed in a unit with an exhaust gas recirculation valve so that the engine coolant flowing between said coolant source and said engine body cooling jacket will cool said exhaust gas re-circulation valve.