本文论述400mL单缸二冲程非增压化油器式汽油机的性能特点。该机采用了层状进气系统,有助于减少扫气期间的短路损失。采用非调谐排气系统使该机在5500r/min时峰值功率达13kW、油耗率最低为265g/(kW·h),更重要的是在整个转速和负荷范围内都低于340g/(kW·h)。在各种汽油机转速下其节气门有几种不同开度时,所有性能都可表示成空燃比的函数。 This paper discusses the performance characteristics of 400mL single cylinder two-stroke non-turbocharged carburetor. The machine uses a layered air intake system, helping to reduce short-circuit losses during scavenging. With a non-tuned exhaust system, the peak power reaches 13kW at 5500 rpm and the minimum fuel consumption rate is 265 g / (kW · h). More importantly, it is below 340 g / (kW · h) at the entire speed and load range h). When there are several different degrees of opening of the throttle at various engine speeds, all of the performance can be expressed as a function of air-fuel ratio.