| 摘要 |
PURPOSE:To reduce the generation of harmful substances and heighten the fuel efficiency of an internal combustion engine having a main and an auxiliary combustion chambers, by improving the structure of a main and an auxialiary torch nozzles, the position of a spark plug electrode, etc. to heighten the compression ratio. CONSTITUTION:A cylinder head 2 is provided with a recess which defines a main combustion chamber M together with the top of a piston 5. The cylinder head 2 is also provided with an auxiliary combustion chamber A located over one side of the recess and separated from it by a wall. A relatively thin mixture of fuel and air, which is made by a main carburetor 9, is supplied to the main combustion chamber M through a main intake port 8. A relatively thick mixture of fuel and air, which is made by an auxiliary carburetor 17, is supplied to the auxiliary combustion chamber A through an auxiliary intake port 16. The combustion chambers M, A are connected to each other through a main torch nozzle 25. Three auxiliary nozzles 26 are radially ramified from the main torch nozzle 25 and opened into the main combustion chamber M. The electrode 24 of a spark plug P is located near the end of the opening of the main torch nozzle 25 on the auxiliary combustion chamber A. |
