PURPOSE: To properly perform the two-cycle operation and the four-cycle operation respectively with one engine by openly and closely controlling an intake port which is formed on the under part of a cylinder wall, with a sleeve valve which is provided at a cylinder liner, according to the revolutions of the engine.
CONSTITUTION: At the operation range at which the detection value of an rotating sensor 81 is lower than a specified value, the two-cycle operation is performed. A sleeve valve 3 is openly and closely driven through controlling an actuator 4 with a controller 8 so that an intake port 12 of a cylinder liner 1 may meet with an opening port 31 of the sleeve 3. In the vicinity of a bottom dead point of a piston 2, intake air from a turbo charger 7 which is pressure- supplied through an intake pipe 13, is led to the inside of a cylinder 1. On the other hand, at the operation range at which the detection value of the rotation sensor 81 is higher than a specified value, four cycle operation is performed. Thus, an intake valve 5 is openly and closely driven by controlling the actuator 51 with the controller 8, and the intake port 12 is closed by the sleeve valve 3.
JP2011074868 | VARIABLE CYCLE ENGINE |
WO/2015/140868 | INTERNAL-COMBUSTION ENGINE AND DRIVE SYSTEM |
WO/2009/137896 | SYNTHESIZED FOUR STROKE ENGINE |
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