| 摘要 |
PURPOSE:To enhance engine efficiency by returning a part of fuel-air mixture in a cylinder to a cylinder of another suction stroke at the first stage of a compression stroke, and by making higher the ratio of an expansion stroke of an engine. CONSTITUTION:At the time when each piston 4a-4b is moved downwardly to each bottom dead point in each suction stroke of each cylinder 1a-1d, and starts moving upward, each suction return valve 9a-9d is opened, a part of the fuel- air mixture is supplied in return to each suction valve 6a-6d, immediately after opened in a suction stroke, through each conduit 10a-10d, and then the mixture is transfered to a compression stroke, an expansion stroke and an exhaust stroke to finish one cycle. Thus, the volume of the burned gas in said expansion stroke is increased than that of said mixture in said compression stroke. Thus, the time of said expansion stroke is extended than said compression stroke, and the heat energy generated by burning the mixture in each cylinder 1a-1d can be utilized as a work until it becomes the lowest usable exhaust temperature. |
