|
| Influences of Fuel Injection Strategies on the Starting Performance of A Diesel Engine at High Altitudes |
| DOI：10.13949/j.cnki.nrjgc.2023.05.001 |
| Key Words:diesel engine high altitude start rail pressure cycle fuel injectionquantity |
|
| Hits: 1525 |
| Download times: 991 |
| Abstract:An experimental study was conducted to investigate the effect of fuel injection strategy on the performance of diesel engines during starting process at different altitudes. The tests were carried out on a single diesel engine with a plateau simulator to stimulate altitudes from 0 to 4 000 m. The result shows that as the altitude increases from 0 to 4 000 m， the transition time and speed-up time of the diesel engine in starting process are prolonged by 14.2% and 15.8%， respectively. Under plain conditions， with the increase of rail pressure， the transition time decreases， and the total starting time shortens. At the altitude of 4 000 m， the transition time and speed-up time both increase first and then decrease with the rail pressure. The fuel injection quantity change with the speed step can reduce the speed transition time and increase the speed-up time during starting process under plain conditions， and the total time is 6.1% shorter than that under the original engine working condition. Increasing the transition speed can inhibit the speed upsurge and shorten the start time. At the altitude of 4 000 m， increasing the initial stage of cycle fuel injection quantity and transition speed can significantly improve the starting performance. |
| View Full Text View/Add Comment Download reader |