Significant improvements in the power density and efficiency of lean-burn large gas-engines with a prechamber and their high flexibility in meeting fluctuating power requirements illustrate the potential for using these engines in stationary power generation and in the transportation sector. Since these engines have comparatively low CO₂ and NOx-emissions, they are seen as a promising solution to meet stricter emission standards. However, current combustion concepts for these engines must be enhanced to improve their performance and emission behavior; simulation methods play a major role in this process. It is critical to know and understand the fundamental processes and their relationships in the prechamber and main combustion chamber; conducting detailed analyses makes this possible. Zero-dimensional methods are suitable for these analyses. Due to their shorter calculation times, they allow extensive parameter variations to be investigated. Common methods in this area are limited to calculating performance and emission related values only in the main combustion chamber. Since a considerable share of NOx-emissions from high-performance lean-burn gas-engines arise in the prechamber, it is imperative to conduct a separate thermodynamic analysis of the prechamber and its interaction with the main combustion chamber. This paper presents a zero-dimensional method with which NOx-emissions from the prechamber can be calculated separately from the emissions of the main combustion chamber. To this end, it is necessary to conduct thermodynamic analyses of both the chambers and to consider their interaction. The measurement data for development and validation of this method is provided by tests on a single-cylinder engine with separate cylinder-pressure indication for both the chambers. Based on the results of the analyses, it can be determined to what extent each of the two systems is involved in the formation of nitrogen-oxides. With knowledge of the origin of NOx-emissions, measures may be enacted that reduce total NOx-emissions.

带有预燃室的稀燃大型燃气发动机在功率密度和效率方面的显着改进及其在满足波动的功率需求方面的高度灵活性说明了将这些发动机用于固定发电和运输部门的潜力。由于这些发动机具有相对较低的 CO ₂和 NOx 排放，它们被视为满足更严格排放标准的有前途的解决方案。然而，这些发动机的当前燃烧概念必须增强，以改善其性能和排放行为；模拟方法在这一过程中发挥着重要作用。了解和理解预燃室和主燃烧室的基本过程及其关系至关重要；进行详细的分析使这成为可能。零维方法适用于这些分析。由于其较短的计算时间，它们允许研究广泛的参数变化。该领域的常用方法仅限于计算主燃烧室的性能和排放相关值。由于来自高性能稀燃燃气发动机的大量 NOx 排放出现在预燃室中，因此必须对预燃室及其与主燃烧室的相互作用进行单独的热力学分析。本文提出了一种零维方法，通过该方法可以将预燃室的 NOx 排放量与主燃烧室的排放量分开计算。为此，有必要对两个腔室进行热力学分析并考虑它们的相互作用。用于开发和验证此方法的测量数据是通过在单缸发动机上进行的测试提供的，该发动机的两个腔室都有单独的气缸压力指示。根据分析结果，可以确定这两个系统中的每一个在多大程度上参与了氮氧化物的形成。在了解 NOx 排放源的情况下，可以制定减少 NOx 排放总量的措施。