【摘要】 重型车是可吸入颗粒和NOx排放的主要污染源。指出为满足严格排放法规的要求,高压喷射将是一个长期的发展趋向。在达欧Ⅲ以上排放要求的柴油机中,通过电控喷油系统能实现理想的喷油速率,通过预循环技术可降低发动机噪声,通过后喷射技术可降低发动机NOx和颗粒的排放。更多还原

【Abstract】 Heavy duty vehicles are the main exhaust sources of both particulate matters (PM) and NOx.It is pointed out that,in order to meet requirements of the more stringent emission regulation,high-pressure injection is a longterm developing trend.For diesel engines which comply with the EURO Ⅲ exhaust emission regulation and above,the electronic controlled fuel injection system is used to realize the ideal injection rate,the pre-circulation technology is used to reduce engine noises and the post-injection technology is used to reduce NOx and PM emissions.更多还原