TY  - EJOU
AU  - Cheng, Jianghua 
AU  - Li, Xiaojian 
AU  - Shi, Lei 
AU  - Lu, Kangbo 
AU  - Leng, Ling 

TI  - A Strategy to Control the Turbocharger Energy of a Diesel Engine at Different Altitudes
T2  - Fluid Dynamics \& Materials Processing

PY  - 2023
VL  - 19
IS  - 4
SN  - 1555-2578

AB  - Power deterioration is a major problem for diesel engines operating at high altitudes. This problem stems from the limited availability of turbocharger energy, which is not enough to increase the boost pressure to the required level. In this study, a control strategy is introduced in order to achieve engine power recovery at different altitudes. It is shown that as the altitude increases from 0 to 4500 m, the required boost pressure ratio increases from 2.4 to 4.3. The needed turbocharger energy should be increased accordingly by 240%, and the TCC (turbine characterization coefficient) should be adjusted within wide ranges. A 12% decrease in the TCC can lead to a rise of the intake air pressure, which can compensate the pressure decrease due to a 1000 m altitude increase. The fluctuation range of boost pressure was within 14.5 kPa for variations in altitude from 0 to 4500 m.
KW  - Turbocharger energy; turbine characterization coefficient; altitude; diesel engine; operating altitude

DO  - 10.32604/fdmp.2023.023687