| 摘要 |
In an otto cycle combustion engine the efficiency is increased and the exhaust gas pollution reduced by every working cylinder (2) having a precombustion chamber (23) into which fuel is injected. The volume of the precombustion chamber (23) is varied cyclically and synchronously with the working cycle of the engine such that it completes a full cycle during two revolutions of the engine crankshaft. The fuel-air mixture ignited in the precombustion chamber (23) is transferred to the working cylinder (2) through a channel the area of which can be constricted and/or varied cyclically with the engine revolutions. The volume of the precombustion chamber (23) is varied from a constant minimum volume to a variable maximum volume, being smaller with lower engine load whereby the compression ratio is increased with decreasing load. |
