| 摘要 |
PURPOSE:To reduce the amount of fuel consumed, by leading the exhaust gas discharged out of a combustion cylinder into an expansion cylinder and thereby making improvements in heat efficiency. CONSTITUTION:Both pistons 13 and 14 are coupled with a crankshaft 3 in common. When a combustion cylinder 1 starts its expansion, an expansion cylinder 2 is in an exhaust stroke. When the piston 13 goes down to somewhere around a halfway point of the stroke, a control valve 8 is opened and leads the exhaust gas into the expansion cylinder 2. When the piston 13 of the combustion cylinder 1 comes to the vicinity of a bottom dead center, a scavenging valve 5 is opened, leading the air-fuel mixture into a combustion chamber, while at an upward stroke of the piston 13, a control valve 11 is opened so that the xhaust gas is discharged to the atmosphere from an exhaust port 12. |
