公开(公告)号：US06845747B2

公开(公告)日：2005-01-25

申请号：US10191740

申请日：2002-07-09

申请人： Jason J. Rasmussen ,  Kevin P. Duffy ,  Kurtis M. Best ,  Matthew R. Roth

发明人： Jason J. Rasmussen ,  Kevin P. Duffy ,  Kurtis M. Best ,  Matthew R. Roth

IPC分类号： F02B3/12 ,  F02D41/14 ,  F02D41/40 ,  F02M45/02

CPC分类号： F02M45/02 ,  F01N2430/085 ,  F02B3/12 ,  F02D41/146 ,  F02D41/402 ,  Y02T10/44

摘要： A method for operating an engine at idle that reduces NOx and controls smoke and hydrocarbon emissions. An idle delivery quantity of fuel is determined and divided into a first quantity of fuel and a second quantity of fuel in approximately equal quantities. During a compression stroke of an engine piston, the first quantity of fuel is injected into an engine cylinder. Adjusting at least one of timing and quantity of the injection of the first quantity of fuel reduces, at least in part, NOx emissions. At a timing angle of at least thirty degrees after the first quantity of fuel is injected and after the first quantity of fuel has been burned, there is an injection of the second quantity of fuel. Adjusting at least one of timing and quantity of the injection of the second quantity of fuel reduces, at least in part, smoke emissions.

摘要翻译： 一种怠速运转发动机的方法，可减少NOx并控制烟气和碳氢化合物的排放。 确定空闲的燃料输送量并将其分成大致相等量的第一数量的燃料和第二量的燃料。 在发动机活塞的压缩行程期间，将第一数量的燃料喷射到发动机气缸中。 至少部分地调节第一量燃料的喷射的时间和数量中的至少一个减少NOx排放。 在第一燃料量被注入至少三十度的定时角之后，在第一燃料量被燃烧之后，喷射第二量的燃料。 至少部分地调整第二量的燃料的喷射的时间和数量中的至少一个减少排烟。