175与1100等型柴油机多数为涡流室式燃烧室,其结构由主燃烧室和涡流室组成,气缸盖上装有镶块,镶块上有长圆形气流通道(主通道)。这一装置促进了燃油雾化与空气的混合,改善了燃烧条件。但由于燃烧室的一部分容积在气缸盖内,热损失及节流损失较大,往往启动困难。为改善启动性能,在镶块上设一启动小孔。在燃烧过程中,涡流室内的大部分燃烧气体会从主通道流 The majority of 175 and 1100 diesel engines are vortex chamber type combustors. The structure consists of a main combustion chamber and a vortex chamber. The cylinder head is provided with an insert, and the insert has an oval airflow passage (main passage). This device promotes the fuel atomization and air mixture, improved combustion conditions. However, as part of the combustion chamber volume in the cylinder head, heat loss and throttling loss, often difficult to start. In order to improve the starting performance, set a starting hole in the insert. During combustion, most of the combustion gases in the vortex chamber will flow from the main channel