公开(公告)号：US06347619B1

公开(公告)日：2002-02-19

申请号：US09537358

申请日：2000-03-29

申请人： Todd Mathew Whiting ,  James Alan Eng, Jr.

发明人： Todd Mathew Whiting ,  James Alan Eng, Jr.

IPC分类号： F02B4708

CPC分类号： F02D13/0276 ,  F02B29/0406 ,  F02B2275/10 ,  F02M26/01 ,  F02M26/05 ,  F02M26/06 ,  F02M26/25 ,  F02M26/38 ,  F02M26/42 ,  Y02T10/18

摘要： Exhaust gas recirculation is provided in a turbocharged diesel engine by adding a separate EGR manifold and a secondary exhaust valve for each combustion chamber that permits passage of exhaust gas from the combustion chamber to the EGR manifold. The secondary exhaust valve is opened during the expansion stroke of the engine cycle and sometime after the combustion process has been completed while the pressure in the combustion chamber is still greater than the pressure in the intake manifold. One or two EGR valves can be opened to admit the high pressure exhaust gas from the EGR manifold into the intake manifold. Decompression braking can be provided by an additional valve between the EGR manifold and the exhaust manifold that is opened to dump the gas from the EGR manifold to the exhaust manifold while the secondary exhaust valve in the cylinder head is opened at the beginning of the expansion stroke of the piston whereby the compressed air in the cylinder escapes before performing work on the piston.

摘要翻译： 在涡轮增压柴油发动机中，通过为允许废气从燃烧室通过到EGR歧管的每个燃烧室添加单独的EGR歧管和二次排气阀来提供排气再循环。 二次排气阀在发动机循环的膨胀冲程期间和在燃烧过程完成之后的某个时刻打开，同时燃烧室中的压力仍然大于进气歧管中的压力。 可以打开一个或两个EGR阀以允许来自EGR歧管的高压废气进入进气歧管。 减压制动可以由在EGR歧管和排气歧管之间的另外的阀提供，该歧管被打开以将气体从EGR歧管倾倒到排气歧管，同时气缸盖中的二级排气阀在膨胀冲程开始时打开 的活塞，由此缸内的压缩空气在对活塞进行作业之前逸出。