Abstract
Experiments of load increasing at constant speed and speed increasing at constant load were conducted on a turbocharged diesel engine with EGR(exhaust gas recirculation). The changing trends of operation parameters of diesel engine versus EGR valve opening was analyzed. Results show that, for the load increasing at constant speed, because of response lag of the turbocharger and mutual influence of inlet and outlet gases, air fuel ratio is decreased and soot emission is increased. For the transient acceleration, the intake flow lag phenomenon is unobvious, air fuel ratio is decreased and soot emission is increased. In the whole transient experiment, intake oxygen volume fraction has greater influence on NOx emission than EGR rate. Because of the change of the intake gas state, the traditional EGR control method based on EGR rate is unsuitable for the transient operating conditions of diesel engine.
| Original language | English |
|---|---|
| Pages (from-to) | 118-124 |
| Number of pages | 7 |
| Journal | Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) |
| Volume | 35 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 25 Mar 2017 |
Keywords
- Diesel engine
- Exhaust gas recirculation
- Transient characteristics
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