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

作　　者：Jianghua Cheng Xiaojian Li Lei Shi Kangbo Lu Ling Leng 

机构地区：[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 PowerMachinery and Engineering of Ministry of Education,Shanghai Jiao Tong University,Shanghai,200240,China

出　　处：《Fluid Dynamics & Materials Processing》2023年第4期959-975,共17页流体力学与材料加工（英文）

基　　金：funded by the National Natural Science Foundation of China[Grant Nos.51576129 and 12102298];the China Postdoctoral Science Foundation[Grant No.2021M702443];the State Key Laboratory of Engines(Tianjin University)[Grant No.K2022-09].

摘　　要：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.

关 键 词：Turbocharger energy turbine characterization coefficient ALTITUDE diesel engine operating altitude 

分 类 号：U464.172[机械工程—车辆工程]