科创中国

Combustion characteristics of common rail diesel engine under high altitude (low pressure) conditions

• 摘要：

  Full load characteristic of a common rail diesel engine after high altitude calibration was conducted via engine plateau environment simulating test bed. Effects of plateau ambient conditions (0-5 km) on low and high speed combustion characteristics were studied. Results show that the mean indicated effective pressure, maximum combustion pressure, maximum rate of pressure rise and peak heat release rate decrease with increasing the altitude at low speed, decreasing by 6.83%, 7.03%, 4.00% and 3.92% averagely and respectively for every 1 km altitude increasing. With increasing the altitude at low speed, the crank angles corresponding to maximum combustion pressure, peak heat release rate and gravity center of heat release keep almost constantly and the crank angle of maximum rate of pressure rise is retarded. Mean indicated effective pressure and peak heat release rate decrease with increasing the altitude at high speed, and they decrease by 2.59% and 2.00% respectively for every 1, km altitude increasing. With increasing the altitude at high speed, maximum combustion pressure shows little variation, maximum combustion temperature is increased, the crank angles corresponding to maximum combustion pressure, maximum combustion temperature and peak heat release rate are advanced. Combustion pressure oscillates at high altitude and high speed, leading to the increase of noise and mechanical load.

• 作者：

  Guang Meng Zhou;Rui Lin Liu;Su Rong Dong;骏 李;Wei Wang;Zhong Jie Zhang;Fei Ge

• 刊名：

  Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines)

• 在线出版时间：

  2012-5