초록

A number of embodiments of engines that improve engine performance and lean running stability by employing internal EGR controlled by controlling the volume of the intake passage between the throttle valve and the intake port in relation to the maximum combustion chamber volume.

대표청구항 ▼

[ What is claimed is:] [1.] An internal combustion engine comprising a combustion chamber formed by a cylinder bore closed at one end by a cylinder head and by a piston reciprocating in said cylinder bore, at least one intake passage serving said combustion chamber through an intake port valved by a

[ What is claimed is:] [1.] An internal combustion engine comprising a combustion chamber formed by a cylinder bore closed at one end by a cylinder head and by a piston reciprocating in said cylinder bore, at least one intake passage serving said combustion chamber through an intake port valved by an intake valve, a throttle valve in said intake passage upstream of said intake port for controlling the flow through said intake passage into said combustion chamber, at least one exhaust passage serving said combustion chamber through an exhaust port, an exhaust valve for controlling the flow through said exhaust port, valve actuating means for operating said intake valve and said exhaust valve between their open and closed positions, the portion of said intake passage between said throttle valve and said intake port and the maximum volume of said combustion chamber when said piston is at bottom dead center position and the degree of overlap between the opening of said intake valve and the closing of said exhaust valve being controlled to a predetermined ratio.