Patent ID: 9458807
Filing Date: 2016-10-04
CPC Classification: F02B,F02M,Y02T

Claim Text:
1. A four-stroke engine comprising: a cylinder head including a combustion chamber, an intake port that communicates with the combustion chamber, a connection hole arranged to connect the intake port and an outside of the cylinder head, and a housing hole arranged to connect the combustion chamber and the intake port, the connection hole including an opening located at an outer surface of the cylinder head and an opening located at an inner wall of the intake port; and a fuel injector that supplies a mist of fuel directly to the combustion chamber by jetting the mist of fuel toward the combustion chamber; wherein the fuel injector includes a body portion and a forward end portion that is connected to the body portion and thinner than the body portion; a first portion of the body portion is located within the intake port, a second portion of the body portion is located within the connection hole, and a third portion of the body portion is located outside the cylinder head; a portion of the forward end portion is located within the housing hole such that the forward end portion supplies the mist of fuel directly to the combustion chamber; the intake port includes a plurality of branch passages that communicate with the combustion chamber and a combined passage in which the plurality of branch passages are combined together; and the body portion penetrates through the connection hole such that a front end of the body portion is disposed in the combined passage.