Diesel combustion studies with alternative fuels

柴油发动机是一种省油、高可靠性的主力技术，为加拿大人民和工业提供了必不可少的动力。然而，柴油发动机在其排气中排放大量的氮氧化物（NOx）和颗粒物（PM）。对柴油废气排放对健康影响的日益关注导致了严格的新的重型柴油发动机废气排放标准。为了达到即将出台的标准，需要对发动机燃烧系统进行改进，更换燃料，并使用附加的尾气后处理设备，包括微粒过滤器、氧化催化剂和氮氧化物吸收器。虽然所有这些技术都有迫切的研究需求，但从长远来看，通过发动机燃烧系统的研究来减少发动机的排放将是实现极低排放水平的关键。

Diesel engines - a workhorse technology is fuel efficient and highly reliable - provide essential motive power to Canada's people and industries. However, diesel engines emit significant quantities of gaseous oxides of nitrogen (NOx) and particulate matter (PM) in their exhaust. Increased concerns about the health effects of diesel exhaust emissions have resulted in stringent new heavy-duty diesel engine exhaust emission standards. A combination of engine combustion system improvements, fuel changes, and the use of add-on exhaust aftertreatment devices including particulate filters, oxidation catalysts and NOx absorbers will be required to meet the upcoming standards. While there are urgent research needs for all of these technologies, reducing engine out emissions through engine combustion system research will be in the long run the key to achieving very low emission levels.