A feasibility study of the new concept exhaust gas recirculation (EGR) system for low carbon vehicles

认识到需要进一步减少车辆废气排放和CO2的温室效应，人们对开发更清洁和更有效的节能车辆动力系统产生了很大的兴趣。在欧洲，最近出台的欧洲立法规定到2015年二氧化碳排放量为130 g/km，并提议到2020年将其减少到100 g/km以下，并在以后进一步减少。为了应对社会、立法和环境压力，大量的发动机研究工作证明了使用越来越大量的废气再循环（EGR）的巨大节能和减排效益。为了满足这些新一代低排放和高效率的内燃机的需要，未来对EGR的需求将在40%至80%的量级，以覆盖在传统（SI、CI）和新（HCCI/CAI）燃烧模式下操作的高增压汽油和柴油发动机的操作范围。然而，这将远远超出当今EGR系统的能力，并促使需要新的研究活动来改进该系统并提供更多的EGR重点。在该方案中，一种新的EGR系统已被提出的基础上，从工业的需求和开发的第一原则。新概念的EGR系统有可能与发动机增压系统协调工作，弥补了以前系统的尴尬合作关系所造成的EGR技术差距。所有的新技术，包括高增压柴油机和汽油机，小型化，HCCI/CAI燃烧都可以通过新概念EGR实现，并进一步改进和推广。这代表了下一代节能内燃机中增强EGR可用性的范式转变，因此该项目的重要性和及时性。拟议的研究是基于申请人在广泛的发动机研究领域的世界领先经验。这将是第一次在工业需求的基础上研究新的EGR系统，并从第一原理开发。该项目的成功成果可能会导致与工业合作伙伴的广泛合作，开发增压EGR的许多新用途，以便开发最具成本效益的排放和节能控制方法，并最终将其纳入未来的发动机和生产车辆。

In recognition of the need to further reduce vehicle exhaust emissions and the greenhouse effect of CO2, there has been a lot of interest in developing cleaner and more efficient energy saving vehicle powertrain. In Europe, this has been enforced by the recently introduced European legislation of CO2 emissions of 130g/km by 2015, and the proposal to reduce it to less than 100g/km by 2020 and further reduction beyond. In response to the social, legislative and environmental pressures, there is a large body of engine research work demonstrating the large energy saving and emissions reducing benefits of using higher and higher quantities of exhaust gas recirculation (EGR). To meet the needs of the these new generation of low emission and high efficiency IC engines, future demand for EGR would be in the order of 40% to 80% to cover the operational range of highly boosted gasoline and diesel engines operating in both conventional (SI, CI) and new (HCCI/CAI) combustion modes. However, this will be far beyond the capability of the present day EGR systems and has prompted the need for new research activities to improve the system and deliver more EGR focused. In the proposal, a new EGR system has been put forward on the basis of needs from industry and developed from first principles. The new concept EGR system has the potential to work in harmony with the engine boost system, bridging the EGR technology gap caused by the awkward partnership of previous systems. All the new technologies, including the highly boosted diesel and gasoline engines, downsizing, and HCCI/CAI combustion could be achieved with the new concept EGR and further improved and extended. This represents a paradigm shift in the availability of boosted EGR in the next generation energy saving IC engines, hence the importance and timeliness of this project. The proposed research is based on the applicants' world leading experience in a wide range of engine research areas. It will be the first time that a new EGR system is examined on the basis of needs from industry and developed from first principles. Successful outcomes from this project could lead to extensive collaboration with industrial partners, exploiting many new uses of boosted EGR so that the most cost-effective emissions and energy saving control methods could be developed and eventually incorporated into future engines and production vehicles.