Sensitivity analysis of diesel engine design parameters using zero-dimensional simulations

IF 6.6 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2026-04-01 Epub Date: 2026-02-28 DOI:10.1016/j.csite.2026.107875

Javaid Rafique , Khalid Saifullah Syed , M. Rafi Raza , Saima Zainab

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Abstract

This study focuses on a detailed sensitivity analysis of the important design parameters of a low-speed, high-torque, direct-injection diesel engine. Thermodynamic models are employed in this study as they offer valuable insights into diesel engine behavior. Key parameters, such as injection timing, piston bowl geometry and Exhaust Gas Recirculation (EGR) are analyzed using the Diesel-RK model. The analysis categorizes critical influencing factors into engine construction, combustion, ecological and environmental parameters. The study finds that a 1.5 bar boost (293K–313K) increases power and torque by over 10% and enhances fuel efficiency by 2.86%, with emissions rising by less than 1%. At 293K and 313K, an optimal Start of Injection (SOI) between 15° and 20° Before Top Dead Centre (BTDC) and a Duration of Injection (DOI) of 12° and 18° increases power by 4.11% and torque by 4.59%, while improving fuel efficiency by 4.16% and 4.92%, respectively and reducing emissions by more than 50%. Additionally, B20 offers an optimal balance between performance and emissions, maintaining diesel-like combustion while significantly lowering NO_x with minimal efficiency loss.

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基于零维仿真的柴油机设计参数敏感性分析

本文着重对低速大扭矩直喷柴油机的重要设计参数进行了详细的灵敏度分析。热力学模型被采用在这项研究中，因为他们提供了宝贵的见解，柴油发动机的行为。使用Diesel-RK模型分析了喷射正时、活塞碗几何形状和废气再循环（EGR）等关键参数。分析将关键影响因素分为发动机结构、燃烧、生态和环境参数。研究发现，1.5巴的增压（293K-313K）可使动力和扭矩提高10%以上，燃油效率提高2.86%，而排放量的增加不到1%。在293K和313K时，最佳的喷射启动（SOI）在顶死点前15°-20°之间，喷射持续时间（DOI）在12°-18°之间，可使功率提高4.11%，扭矩提高4.59%，燃油效率分别提高4.16%和4.92%，排放量减少50%以上。此外，B20在性能和排放之间提供了最佳平衡，保持了与柴油类似的燃烧，同时以最小的效率损失显著降低了氮氧化物。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.