초록 ▼

A number of embodiments of engines having direct cylinder injection wherein the fuel injector is positioned so as to be shrouded by the piston during at least a portion of its stroke. This permits the use of less expensive and lower pressure fuel injection nozzles. The spray pattern of the injector

A number of embodiments of engines having direct cylinder injection wherein the fuel injector is positioned so as to be shrouded by the piston during at least a portion of its stroke. This permits the use of less expensive and lower pressure fuel injection nozzles. The spray pattern of the injector is chosen so that some fuel is sprayed toward the spark plug to provide stratification, but the major portion is directed toward the head of the piston so to as insure a homogeneous mixture when operating at high speed, high load conditions.

대표청구항 ▼

[ What is claimed is:] [1.] A direct cylinder injected internal combustion engine comprised of a cylinder block having a cylinder bore extending from an upper peripheral edge closed by a cylinder head, a piston reciprocating in said cylinder bore between a bottom dead center (BDC) position and a top

[ What is claimed is:] [1.] A direct cylinder injected internal combustion engine comprised of a cylinder block having a cylinder bore extending from an upper peripheral edge closed by a cylinder head, a piston reciprocating in said cylinder bore between a bottom dead center (BDC) position and a top dead center (TDC) position and forming with said cylinder bore and cylinder head a variable volume combustion chamber, said piston having a piston head facing said cylinder head and at least an upper ring groove extending circumferentially therearound and receiving a piston ring, the distance between said piston at said BDC position and the upper peripheral edge of said cylinder bore being expressed as the dimension L, the distance between the lower end of said ring groove and said upper peripheral edge of said cylinder head when said piston is at said TDC position being expressed by the dimension RS, a fuel injector supported within said cylinder block and having a nozzle having a spray axis extending transversely into said cylinder bore, said spray axis laying at a distance A from said cylinder bore upper peripheral edge and such that said spray axis is covered by said piston during at least a portion of its stroke, and the following relationship is true: EQU RS