Fuel Injection Equipment, Internal Combustion Engine, and Control Method of Fuel Injection Equipment

Abstract

A fuel injection equipment to control the instability of combustion when the airflow is weak, and improve the fuel cost. A fuel injection equipment for an cylinder injection type and spark ignition type internal combustion engine that injects gasoline directly to a combustion chamber, wherein the top angle at the point of fuel spray in the pressurized atmosphere of absolute pressure 0.5MPa is from −10° to 10°. Further, the fuel is injected at the compression stroke of the internal combustion engine which installs the fuel injection equipment, and said internal combustion engine is started.

1 . A cylinder type and spark ignition type internal combustion engine having an injector for injecting gasoline directly into a combustion chamber, wherein the injector is so constituted as to inject through a fuel nozzle hole lead fuel spray directed to a plug and main fuel spray directed to a piston, the main fuel spray being small in penetration as compared with the lead fuel spray; the lead fuel spray has at its point a top angle between −10° and +10° in a pressurized atmosphere having an absolute pressure of 0.5 MPa; and a rotation angle (β) of the fuel spray is set so that an electrode of the plug is within a range (α) of angle within which the lead spray exists.  
   
   
       2 . The cylinder injection type and spark ignition type internal combustion according to claim  11 , wherein the rotational angle of the lead fuel spray is so restricted as to be 5° or less on both sides of a straight line connecting the fuel nozzle hole and the electrode in the direction of the rotation of the lead spray.  
   
   
       3 . The cylinder injection type and spark ignition type internal combustion according to claim  11 , wherein the penetration of the lead spray in the absolute pressure of 0.5 MPa after 2.7 ms of the start of the injection is long as compared with a distance between the fuel nozzle hole and the electrode.