| 摘要 |
The invention relates to an internal combustion engine having, a working cylinder (6), means for supplying gas under pressure (8), means for supplying a gas and fuel mixture (8, 9, 34) exhaust valve means (28) and inlet valve means (1, 2). The inlet valve means (1, 2) delivers both gas under pressure and gas and fuel mixture to the working cylinder (6), commencing delivery of the gas under pressure at an earlier stage in the engine cycle to the commencement of delivery of gas and fuel mixture. The inlet valve means (1, 2) delivers gas under pressure to the cylinder (6) at least for a part of the time that the exhaust port (28) is open so as to drive combusted gases out of the cylindrical. The invention also relates to a rotary valve for an engine having a first member (1) of a cylindrical external configuration, a sleeve (2) surrounding the first member (1) and means (4, 5) for rotating the sleeve (2) relative to the first member (1). The first member (1) comprises a plurality of fluid passages (30, 31) and a plurality of apertures (26, 27) allowing communication of each of the passages (30, 31) with the exterior of the first member (1). The sleeve (2) has at least one aperture (25) which aligns with the apertures (26, 27) of the first member on rotation of the sleeve for a certain portion of the engine cycle. The rotary valve is positioned adjacent the cylinder (6) such that a passage of the first member (1) communicates with the cylinder (6) when the associated aperture in the first member is aligned with the aperture (25) in the sleeve. |
