高原环境下国六车用柴油机性能优化

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中图分类号：TK427 收稿日期：2025-03-15 DOI：10.19999/j.cnki.1004-0226.2025.07.006

Optimisation of National VI Vehicle Diesel Engine Performance at High Altitude

Zhao Bin Jiang Yunfei Xie Libing Zheng Yongming Zeng Xiahan CATARC Automotive Test Center（Kunming）Co.，Ltd.，Kunming ，China

Abstract：This study investigates the performance differences of diesel engines at 0m and 3000m altitudes through intake/exhaust altitude simulation，and optimizes engine power performance and pollutant emissions at 3 000m altitude.The results show that compared with plain conditions，at 3000m altitude：the engine power decreases by approximately 0%～40.22% ，fuel consumption increases by 1%～10% ，smoke opacity（FSN）surgesbyup to 110% ，and NOx emissions at 1000～1200r/min risebyabout 3%～13% .Afteroptimization at 3 000m altitude：the rated speed torque （ 2200r/min ）increasesby 3.88% （with 0.18% fuel consumption reduction），maximum torque speed（ 1100r/min ）torque improves by 2.67% （with 0.6% fuel consumption reduction），and idle speed torque （ 800r/min ） increases by 38.45% （with 1.42% fuel consumption reduction and 4.09% smoke opacity reduction）.

Key Words：Diesel engine;High altitude;Dynamics;Emission characteristics;Optimization

1前言

我国高原地区辽阔，海拔高于 1000m 的国土面积约占全国总面积的 58% ，海拔超过 2000m 的国土面积约占 33%[1] 。（剩余6865字）