Patent ID: 6349697
Filing Date: 2002-02-26
Classification: F01P,F02B,F02F,Y02T

Abstract:
A direct-fuel-injection spark-ignition internal combustion engine which switches its combustion mode in accordance with an operating state of the engine between stratified charge combustion in which fuel is injected during a latter half of a compression stroke and homogeneous combustion in which fuel is injected during an intake stroke, comprising:a cylinder bore into which the fuel is injected to cause the stratified charge combustion or the homogeneous combustion; a fuel injection valve located in an upper section of the cylinder bore, and which directs fuel toward an impingement portion of the cylinder bore located opposed to the fuel injection valve in a lower section of the cylinder bore; and a cooler which cools the cylinder bore so as to suppress a fall in temperature of at least one area of the cylinder adjacent to the impingement portion in comparison with a fall in temperature of the other area of the cylinder bore than the at least one area adjacent to the impingement portion, the other area including an area above the impingement portion on a same side of the cylinder bore as the impingement portion.