| 摘要 |
PURPOSE:To miniaturize the size of an engine by connecting each of a pair of front and rear pistons to each individually provided crank pin, and driving cam shafts on the tops of front and rear cylinders with a cam chain provided on one side for holding the rear and the front cylinder respectively. CONSTITUTION:Pistons of front and rear cylinders 3, 3 are connected individually to a crank shaft 4 by each crank pin. A cam chain 5 for the front cylinder 3 is hooked around a sprocket 15 located on the end side for mounting a generator 14 so as to be provided on one side for holding the rear cylinder 3. The cam chain 5 for the rear cylinder 3 is hooked around a sprocket 16 provided in the gap between a bearing wall 1a and an output gear 10a so as to be provided on the other side for holding the front cylinder 3. The main shaft 8 of a transmission gear 7 provided backward, projects from the bearing wall 1a so as to be connected to the crank shaft 4 via a connection mechanism 10, while an oil pump is driven via a chain 13. Therefore, an engine can be miniaturized in its size by this construction. |
