Open Access

ARTICLE

A Strategy to Control the Turbocharger Energy of a Diesel Engine at Different Altitudes

Jianghua Cheng^1,2, Xiaojian Li², Lei Shi^3,*, Kangbo Lu³, Ling Leng³

1 National Key Laboratory of Diesel Engine Turbocharging Technology, China North Engine Research Institute, Tianjin, 300400, China
2 School of Mechanical Engineering, Tianjin University, Tianjin, 300073, China
3 Key Laboratory for Power Machinery and Engineering of Ministry of Education, Shanghai Jiao Tong University, Shanghai, 200240, China

* Corresponding Author: Lei Shi. Email:

Fluid Dynamics & Materials Processing 2023, 19(4), 959-975. https://doi.org/10.32604/fdmp.2023.023687

Received 09 May 2022; Accepted 18 July 2022; Issue published 02 November 2022

Abstract

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.

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Keywords

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