Control of advanced combustion modes in internal combustion engines and integration with exhaust gas aftertreatment

内燃机先进燃烧模式的控制以及与废气后处理的集成

• 批准号: RGPIN-2016-04646
• 负责人: Koch, Charles
• 金额: $ 2.77万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=655781
• 关键词: Control; advanced; combustion; modes; internal

Typical of many western countries, the transportation sector in Canada produces about 30% of Green House Gases (GHG) and exhaust emissions such as NOx and particulates which adversely affect public health in large urban centers. This has led to worldwide stringent future exhaust emission regulations and these will require that major new technologies be developed. For example, in the United States, stringent fuel economy standards for 2016 that have been introduced require combined car and light duty truck fleet-wide fuel economy to improve from 35.5mpg in Model Year 2016 to 54.5mpg in 2025. This is directly relevant to Canada as the automotive sector is transnational. The USA Environmental Protection Agency (EPA) projects: “... EPA expects that the majority of improvements will come from advancements in internal combustion engines...”. To comply with emission regulations the internal combustion engine requires a complex exhaust gas aftertreatment system with integrated engine control.***Recently, advanced combustion modes such as Low Temperature Combustion (LTC) have emerged as a very promising major new technology to significantly reduce fuel consumption and harmful emissions such as NOx and particulates from internal combustion engines. LTC modes can be described to operate between conventional spark ignition gasoline and direct injection Diesel engines. However, to extract the potential of these complex LTC modes, a fundamental understanding of combustion and control strategies is still needed. Due to the stringent emission regulations, these LTC modes must be combined with exhaust gas aftertreatment which requires a detailed understanding of the complete system to realize an integrated control system.***The objective of this research is to understand and control the LTC modes such as Homogeneous Charge Compression Ignition (HCCI) coupled with exhaust gas aftertreatment with the goal to reduce greenhouse gases, NOx and particulate emissions. To do this a combined modeling and experimental approach will be used. Complex simulation models based on combustion chemistry will be used to predict HCCI ignition timing. Using model order reduction the complex model will be simplified to a control oriented model that is suitable for control design. Ignition timing control will then be designed based on the simpler model. All models will be parameterized and validated by experiment in the engine lab. The ignition timing control will also be tested on the engine. The experimental testing is also used to improve the simulation models and the control. Since HCCI can burn a variety of fuels, this process will be performed for a variety of fuels. This research has the potential to significantly improve fuel economy and reduce harmful emissions from cars and trucks improving urban air quality while maintaining the mobility and economic requirements of Canadians.**

作为许多西方国家的典型，加拿大的交通运输部门产生了约30%的温室气体（GHG）和废气排放，如氮氧化物和微粒，对大城市中心的公众健康产生不利影响。这导致了全球范围内严格的未来废气排放法规，这些法规将要求开发主要的新技术。例如，在美国，2016年出台了严格的燃油经济性标准，要求轿车和轻型卡车的整体燃油经济性从2016年的35.5英里/加仑提高到2025年的54.5英里/加仑。这与加拿大直接相关，因为汽车行业是跨国的。美国环境保护署（EPA）预测：“……环保署预计，大部分的改进将来自内燃机的进步……”为了符合排放法规，内燃机需要一个复杂的废气后处理系统与集成的发动机控制。***最近，先进的燃烧模式，如低温燃烧（LTC）已经成为一项非常有前途的主要新技术，可以显着减少燃料消耗和有害排放，如内燃机的氮氧化物和微粒。LTC模式可以描述为在传统的火花点火汽油和直喷柴油发动机之间工作。然而，为了挖掘这些复杂的LTC模式的潜力，仍然需要对燃烧和控制策略有一个基本的了解。由于严格的排放法规，这些LTC模式必须与废气后处理相结合，这需要对整个系统进行详细的了解，以实现综合控制系统。***本研究的目的是了解和控制LTC模式，如均匀电荷压缩点火（HCCI）与废气后处理相结合，以减少温室气体、氮氧化物和颗粒排放。为了做到这一点，将采用建模和实验相结合的方法。基于燃烧化学的复杂仿真模型将用于预测HCCI点火正时。采用模型阶数约简的方法，将复杂的模型简化为面向控制的模型，适合于控制设计。点火正时控制将基于更简单的模型进行设计。所有模型将在发动机实验室进行参数化和实验验证。点火正时控制也将在发动机上进行测试。通过实验验证，对仿真模型和控制进行了改进。由于HCCI可以燃烧多种燃料，因此该过程将针对多种燃料进行。这项研究有可能显著提高燃油经济性，减少汽车和卡车的有害排放，改善城市空气质量，同时保持加拿大人的机动性和经济需求