| 摘要 |
PURPOSE:To reduced the blow-by of an air-fuel mixture due to scavenging in time of high load, by scavenging the inside of a cylinder with air out of an air blower driven by exhaust energy, in advance of feeding each cylinder with the air-fuel mixture by dint of pressure inside a crankcase. CONSTITUTION:With a piston 1 going down, first an exhaust port 2 is made to open, driving a turbine 3 by a spout of sudden exhaust gas, and air is fed, with pressure, to an accumulator 5 by a blower 4 situated on the same axis. Next, air is fed to the inside of a cylinder 8 from a preceding scavenging air port 7 through a control valve 6, and combustion inert gas is scavenged. Successively an air-fuel mixture feed port 9 is opened, and an air-fuel mixture is fed to the cylinder 8. At this time, pre-cycle combustion gas inside the cylinder 8 is pushed out most of it by the preceding air scavenging, and air is charged instead so that a little quantity of relatively thick mixture in fuel density is supplied in consequence whereby it is able to respond to the load required by an engine. |
