Research And Development Of ECU On Two-Stroke GDI Gasoline Engine

Two-stroke engine has its intrinsic advantages in terms of high specific power,compactness, light weight, low cost, etc. However, because it depends on mixturescavenging, which leads to fuel short-circuiting and excessive exhaust emissions infresh mixture during the light load state, two-stroke engine also has its inherentdisadvantages, such as high fuel consumption, poor emission. Theoretically,GDI(Gasoline Direct Injection) is an effective way to solve the short-circuitingproblem, since it allows the introduction of the fuel separately from the scavenging air.Concerning the problem of non-completed combustion during light load, it can besolved by minimizing the left exhaust emission and using stratified combustion.This work mainly presents the development of an ECU(Electronic Control Unit)for two-stroke engine integrated with FAI technology, which is good at highpulse-pressure injection. Then, the engine bench test was conducted on an AX-100motorcycle engine, and the performance of economy, power and emission wasrecorded. Based on BSFC and emission, we finally got the best control parametersand its changing tendency, as well as its control MAP. What's more, we also did someresearch about the control strategy of two-stroke engine.By analyzing experimental results above, we find that this electronic injectionsystem has its capability to improve the 2-stroke engine's performance, reduce fuelconsumption and pollutants emission dramatically.