Engine with injector mounting and cooling arrangement

摘要

An internal combustion engine is provided including an injector having an injector body including a nozzle assembly having an annular outer surface. A cylinder head includes an injector mounting bore to receive the injector, and a lower sealing portion. The engine also includes an engine coolant passage formed in the cylinder head to receive engine coolant to remove heat from the cylinder head. The engine coolant passage opens into, and is fluidly connected to, the mounting bore to cause coolant in the coolant passage to contact the annular outer surface of the nozzle assembly. A lower seal is positioned between the lower sealing portion and the nozzle assembly to form a fluid seal.

主权项

1. An internal combustion engine, comprising:
an injector including a nozzle assembly having an outer surface; a cylinder head including an injector mounting bore to receive the injector, an upper sealing portion, and a lower sealing portion; an upper seal positioned between said upper sealing portion and said nozzle assembly to form a fluid seal; an engine coolant passage formed in said cylinder head to receive engine coolant to remove heat from said cylinder head, said engine coolant passage opening into, and fluidly connected to, said mounting bore to cause coolant in said coolant passage to contact said outer surface of said nozzle assembly; and a lower seal positioned between said lower sealing portion and said nozzle assembly to form a fluid seal, said lower seal including a flange and a annular cooling sleeve extending from the flange to surround a portion of the nozzle assembly, said flange positioned between the nozzle assembly and the cylinder head to create the fluid seal and having a surface in contact with said coolant.