主办：陕西省汽车工程学会
ISSN 1671-7988  CN 61-1394/TH
创刊：1976年
汽车实用技术

汽车实用技术 ›› 2025, Vol. 50 ›› Issue (20): 97-101.DOI: 10.16638/j.cnki.1671-7988.2025.020.018

• 测试试验 • 上一篇    

车用内燃机瞬时转速下缸内燃气压力分析

张晓鹏   

  1. 中国重汽集团福建海西汽车有限公司
  • 发布日期:2025-10-17
  • 通讯作者: 张晓鹏
  • 作者简介:张晓鹏（1982－），男，高级工程师，研究方向为汽车产品开发

Analysis of Gas Pressure in the Cylinder of Automotive Internal Combustion Engines at Instantaneous Rotational Speed

ZHANG Xiaopeng   

  1. Sinotruk Fujian Haixi Truck Company Limited
  • Published:2025-10-17
  • Contact: ZHANG Xiaopeng

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摘要： 为深入探究车用内 燃机瞬时转速下缸 内燃气压力的表现 特性，文章选取潍柴 WP10.336E53 柴油机作为实验对象。通过同步采集该柴油机缸压与转速信号，并运用曲轴连 杆动力学模型与牛顿-拉夫逊迭代算法反演缸内压力，系统分析了不同转速和负荷工况下的缸 内燃气压力特性。分析结果显示，随着瞬时转速从 750 r/min 升至 1 950 r/min，缸内平均压力 显著增加，从 12.5 MPa 升至 20.5 MPa（增幅为 64%），但压力波动范围扩大，表明高速工况 下燃烧稳定性降低；在瞬时转速为 1 150 r/min、负荷从 25%增至 75%时，压力峰值增长 27%， 远高于单纯转速提升的影响。由此表明，转速波动（ ±15 r/min）与缸压变化呈强相关性，在 瞬态工况下缸内压力会呈现显著超调或不足的情况。

关键词: 车用内燃机；瞬时转速；缸内燃气压力

Abstract: To investigate the performance characteristics of cylinder gas pressure under instantaneous speed of automotive internal combustion engines, Weichai WP10.336E53 diesel engine is selected as the experimental object. By synchronously collecting the cylinder pressure and speed signals of the diesel engine, and using the crankshaft connecting rod dynamic model and Newton-Raphson iterative algorithm to invert the cylinder pressure, the system analyze the characteristics of cylinder gas pressure under different speed and load conditions. The average pressure in the cylinder increased significantly with the increase of speed, from 12.5 MPa at 750 r/min to 20.5 MPa at 1 950 r/min (an increase of 64%), but the pressure fluctuation range expands, indicating a decrease in combustion stability under high-speed conditions. At 1 150 r/min, when the load increases from 25% to 75%, the peak pressure increases by 27%, which is much higher than the effect of simply increasing the speed. This indicates that there is a strong correlation between speed fluctuations (±15 r/min) and cylinder pressure changes, and the cylinder pressure will show significant overshoot or insufficiency under transient operating conditions.

Key words: automotive internal combustion engine; instantaneous rotational speed; gas pressure in cylinder