在德国专利文件240435中叙述了在给定的辛烷值下可采用比迄今所能达到的压缩比还要高得多的一台外源点火内燃机。在此方式中,于压缩冲程快结束时,一部分很均匀的燃料空气混合气通过一个偏心的导向通道被挤压到紧凑的不分开式燃烧室,在室内产生一个很集中的下沉气流(见图1及2)。由于火焰传播距离缩短了,并伴随着充量的运动,就可以使很稀的混合气实现迅速、完全而均匀的燃烧。其燃料消耗率与柴油机的很相近。 German patent document 240 445 describes the use of an externally fired internal combustion engine at a given octane number which is considerably higher than the compression ratio hitherto achieved. In this manner, at the end of the compression stroke, a portion of the homogeneous fuel-air mixture is forced through a decentered pilot passage into a compact, undivided combustion chamber to produce a concentrated, concentrated downdraft within the chamber (see Figures 1 and 2). Due to the shortened propagation distance of the flames and the accompanying amount of motion, a very, very homogeneous mixture can be quickly, completely and uniformly combusted. Its fuel consumption is very similar to that of a diesel engine.