The effect of common rail system's injection timing and rail pressure on high-power diesel's fuel economy and emission characteristics has been studied through tests. The experimental results show that with the rail pressure increasing, fuel economy and smoke are improving, while NO_x is deteriorating. However, as rail pressure very high, the improving trends of smoke and fuel economy are not obvious terribly, and even at low load condition, the economy will decline instead. With injection timing delayed, NO_x is reducing while smoke and fuel economy are augmenting at the conditions of high load. However, at the low load conditions, with injection timing lagging, smoke and NO_x will decline simultaneously.
展开▼
