UNIFLOW-SCAVENGING-TYPE TWO-CYCLE ENGINE

摘要

A uniflow-scavenging-type two-cycle engine of the present invention includes: a cylinder; a piston that slides in the cylinder; an exhaust port that is provided at a first end of the cylinder; an exhaust valve that opens and closes the exhaust port; a scavenging port that is provided in an inner circumferential surface of a second end of the cylinder in the stroke direction of the piston and draws in an active gas into the combustion chamber in accordance with a sliding movement of the piston; and a plurality of fuel injection valves that inject a fuel gas to the active gas, which has been drawn in from the scavenging port to the combustion chamber, to thereby generate a premixed gas. The fuel injection valves at least include: a first fuel injection valve that injects a fuel gas along a swirling flow of the active gas drawn in into the cylinder; and a second fuel injection valve that injects a fuel gas toward a direction closer to a central axis of the cylinder than the direction of the fuel gas from the first fuel injection valve.

主权项

1. A uniflow-scavenging-type two-cycle engine, comprising:
a cylinder in which a combustion chamber is formed; a piston that slides in the cylinder; an exhaust port that is provided at a first end of the cylinder in a stroke direction of the piston; an exhaust valve that opens and closes the exhaust port; a scavenging port that is provided in an inner circumferential surface of a second end of the cylinder in the stroke direction of the piston and draws in an active gas into the combustion chamber in accordance with a sliding movement of the piston; and a plurality of fuel injection valves that inject a fuel gas to the active gas, which has been drawn in from the scavenging port to the combustion chamber, to thereby generate a premixed gas, wherein the fuel injection valves at least comprise: a first fuel injection valve that injects a fuel gas in a direction along a swirling flow of the active gas drawn in into the cylinder; and a second fuel injection valve that injects a fuel gas toward a direction closer to a central axis of the cylinder than the direction of the fuel gas from the first fuel injection valve.