郑茂勇^1,2，孙振宇^1,2，于淼淼^1,2，董卫涛^1,2，黄鹏^1,2

1.内燃机可靠性国家重点实验室，山东 潍坊  261061；2.潍柴动力股份有限公司，山东 潍坊  261061

摘要：以8缸直列双增压柴油机为研究对象，建立一维仿真模型，研究不同发火顺序及排气管布置组合对柴油机经济性、低速动力性、单缸均匀性的影响。计算结果表明：对于定压排气管，发火顺序对柴油机性能影响较小，仅通过优化发火顺序无法大幅度提高柴油机低速经济性和低速动力性；排气管布置和发火顺序组合优化对柴油机性能影响较大，可以在兼顾高速性能及单缸均匀性的前提下，大幅度提高柴油机低速经济性和低速动力性。

关键词：柴油机；发火顺序；排气管布置；低速动力性；单缸均匀性

Abstract：Based on an 8-cylinder in-line dual-turbocharged diesel engine, an one-dimensional simulation model is established to study the effects of fire order and exhaust pipe layout on fuel economy, low speed power performance and cylinder uniformity. The results indicate that the fire order has little effect on the diesel engine performance for the constant pressure exhaust pipe, and the low speed fuel economy and low speed power performance of the diesel engine cannot be greatly improved only by optimizing the fire order. The combined optimization of exhaust pipe layout and firing order has a great effect on the diesel engine performance, which can improve low speed economy and low speed power performance effectively on the premise of ensuring the high speed performance and the cylinder uniformity.

Keywords:diesel engine; fire order; exhaust pipe layout; low speed power performance; cylinder uniformity