Two-cycle internal combustion engine

Details Two-cycle internal combustion engine Two-cycle internal combustion engine

F - Mech Eng,Light,Heat,Weapons

02

B

F02B 75/02 (2006.01)

Patent

CA 2352622

To provide a two-cycle internal combustion engine including a combustion chamber; a chamber portion adjacent to the combustion chamber; a communication passage between the combustion chamber and the chamber portion; and a control valve, provided in the communication passage, for opening the communication passage nearly at a point of time when a scavenging opening is closed and closing the communication passage at a mid point in the compression stroke, wherein an air-fuel mixture flows from the chamber portion side into the combustion chamber via the communication passage by operating the control valve, which engine is intended to eliminate scattering of fuel in the chamber portion due to splashing of part of the stream of fuel sprayed from a fuel injector. A portion, on the chamber portion side, of the communication passage is taken as a gas passage for communicating the control valve to the chamber portion. A fuel injector for injecting fuel is provided at a mid point in the gas passage via a connection passage in such a manner as to be directed to the inner wall surface of the gas passage while being slightly tilted toward the control valve. A fuel sump recess is provided in a cylinder block at a boundary between the control valve and the gas passage, and fuel is injected in the recess.

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