| 摘要 |
<p>A combustion engine (1) of the piston engine type where the static compression ratio exceeds approximately 15:1, especially in the range of from approximately 15:1 to approximately 20:1, preferably approximately 17:1. The engine is provided with an ignition system (3) where the ignition point is situated after the top dead center (TDC), especially in the range of from approximately 0° TDC to approximately 20° TDC, preferably approximately 4° TDC. As a result, it is possible to achieve an ignition of a fuel, the spontaneous ignition capacity of which at the predetermined compression ratio does not usually suffice. The resulting ignition generates a maximum pressure in the cylinder of approximately 90° TDC, whereby a high efficiency of the fuel is obtained without simultaneously involving a steep increase in the temperature in the combustion chamber. A Venturi (71) for the combustion engine (1) according to the invention is substantially axially symmetrical when seen in the flow direction. The Venturi comprises a mixing chamber, an inlet side of an annular, slot-forming ring, an outlet side of the annular, slot-forming ring and a transition portion (77) to the inlet manifold (11).</p> |
