Patent ID: 6289870
Filing Date: 2001-09-18
Classification: F02B,F02F,Y02T

Abstract:
A direct fuel injection, spark-ignition internal combustion engine comprising a spark plug, a fuel injection valve and a cavity formed on the top surface of the piston, said cavity having a bottom wall, a spark plug side wall and a fuel injection valve side wall, said fuel injection valve injecting fuel toward said bottom wall of said cavity in stratified charge combustion, said fuel mainly proceeding toward said spark plug side wall of said cavity along said bottom wall, being deflected by said spark plug side wall and being led to the vicinity of said spark plug, wherein said spark plug side wall of said cavity is provided with a deflecting portion inclined toward the inside of said cavity, a first part of said deflecting portion provided on both sides of said spark plug side wall functions to lead the fuel to the vicinity of said spark plug, and a second part of said deflecting portion provided on the central portion of said spark plug side wall functions to lead the fuel to a region neighboring the side of said fuel injection valve from said vicinity of the spark plug.