首页>
外国专利>
Selective cylinder deactivation apparatus and method for high power diesel engines
Selective cylinder deactivation apparatus and method for high power diesel engines
展开▼
机译:用于大功率柴油机的选择性气缸停用装置和方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
Various embodiments relate to a method of operating an engine system with injectors having nozzle sac volume. The engine system may be a four-stroke, high power engine having a high-pressure common-rail injection system. A number of engine cylinders to fire is selected based on a fuel injection quantity per selected engine cylinder such that a nitrogen oxides (NOx) emission is less than a first predetermined threshold and a smoke value is less than a second predetermined threshold. The fuel injection quantity per cylinder may be higher than a nominal fuel injection quantity to improve fuel injector spray characteristics. The exhaust can be mixed with fresh air blowout from deactivated cylinders to further reduce smoke value. The engine system is operated with a firing pattern for the selected number of cylinders to fire.
展开▼
机译:各种实施例涉及一种利用具有喷嘴囊体积的喷射器来操作发动机系统的方法。发动机系统可以是具有高压共轨喷射系统的四冲程大功率发动机。基于每个选定发动机汽缸的燃油喷射量选择要点火的发动机汽缸数,以使氮氧化物(NO x Sub>)排放量小于第一预定阈值,而烟气值小于第二预定阈值。每个汽缸的燃料喷射量可以高于标称燃料喷射量,以改善燃料喷射器的喷雾特性。排气可以与停用的气缸中吹出的新鲜空气混合,以进一步降低烟雾值。发动机系统以点火模式运行,以使选定数量的气缸点火。
展开▼