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一种新型的1800r/min系列发动机已经问世,这类发动机基于一种独特原理的燃烧室,其燃烧室的设计旨在产生极强的涡流。这种活塞可以使发动机在稀可燃混合气状态下获得低NOx排放的同时,能稳定地运转,并且燃料经济性非常好。这种新型燃烧室是在平顶活塞上挖下一个偏心非圆的深碗形组成。在活塞顶面一侧挤气面积约占总面积50％,所形成的高速横向气流进入(随后流出)碗中后,在中心安装的火花塞处产生高速径向气流。这些发动机有6、8、12和16缸等,其单缸额定功率为50kW/1800r/min、涡轮增压、中冷。基础部分设计成坚固的结构,它可以承受涡轮增压柴油机的负荷,其余部分则是为火花塞点火的天然气发动机而设计的。气缸盖有4个气阀,进气道能产生高涡流,并增强了气缸盖的冷却,以适应天然气发动机较高的温度。活塞采用高速喷油冷却,所喷
A new 1800r / min series engine has been introduced that is based on a unique principle of combustion chambers designed to create extremely turbulent eddies. This kind of piston can make the engine get low NOx emission under the condition of lean combustible mixture, and can work stably, and the fuel economy is very good. This new type of combustion chamber is made of a flat-top piston dug off an eccentric non-circular deep bowl shape. The squish area on the top side of the piston is about 50% of the total area and the resulting high velocity cross flow creates (and then exits) the bowl and creates a high velocity radial flow at the center mounted spark plug. These engines have 6, 8, 12 and 16 cylinder, the single-cylinder rated power of 50kW / 1800r / min, turbocharged, cold. The foundation section is designed to be rugged enough to withstand the load of a turbocharged diesel engine while the rest is designed for spark-ignited natural gas engines. The cylinder head has four valves that create high vortices and enhance the cooling of the cylinder head to accommodate the higher temperatures of natural gas engines. Pistons using high-speed fuel injection cooling, the spray