公开(公告)号：US06962143B2

公开(公告)日：2005-11-08

申请号：US10619456

申请日：2003-07-16

申请人： Thomas William Ryan, III ,  Robert Wayne Burrahm ,  Rudolf Hermann Stanglmaier ,  Charles Edward Roberts, Jr. ,  James Corwin Snyder ,  Lee Gene Dodge ,  Daniel William Stewart ,  Timothy Joseph Callahan ,  John Thomas Kubesh

发明人： Thomas William Ryan, III ,  Robert Wayne Burrahm ,  Rudolf Hermann Stanglmaier ,  Charles Edward Roberts, Jr. ,  James Corwin Snyder ,  Lee Gene Dodge ,  Daniel William Stewart ,  Timothy Joseph Callahan ,  John Thomas Kubesh

IPC分类号： F02B1/04 ,  F02D13/02 ,  F02D21/08 ,  F02D41/00 ,  F02D41/02 ,  F02D41/14 ,  F02D41/36 ,  F02D41/40 ,  F02P9/00 ,  F02B3/10

CPC分类号： F02D13/0215 ,  F02B1/04 ,  F02D21/08 ,  F02D41/0047 ,  F02D41/0087 ,  F02D41/0235 ,  F02D41/1454 ,  F02D41/402 ,  F02D41/403 ,  F02D2041/001 ,  F02M26/16 ,  F02M26/23 ,  F02M26/71 ,  F02P9/002 ,  Y02T10/18

摘要： A heavy-duty flame propagation engine has control systems and exhaust aftertreatment systems adapted to provide ultra-low emissions relative to Diesel engines while achieving comparable fuel consumption at reduced emission levels. The control systems include exhaust gas circulation, variable valve actuation, cylinder deactivation, pilot fuel injection, high energy ignition systems and combinations thereof to provide substantially stoichiometric combustion conditions over an entire load range of the engine. In one embodiment, the engine has direct in-cylinder fuel injection, is adapted for lean air-fuel mixture operation, and includes an oxidation catalyst and a lean NOx adsorber.

公开(公告)号：US5735245A

公开(公告)日：1998-04-07

申请号：US735105

申请日：1996-10-22

申请人： John Thomas Kubesh ,  Lee Gene Dodge ,  Daniel James Podnar

发明人： John Thomas Kubesh ,  Lee Gene Dodge ,  Daniel James Podnar

IPC分类号： F02D37/02 ,  F02D41/00 ,  F02D41/04 ,  F02D41/24 ,  F02P5/04 ,  F02P5/15

CPC分类号： F02D37/02 ,  F02D41/0007 ,  F02D41/04 ,  F02D41/2406 ,  F02P5/04 ,  F02D2200/0418 ,  Y02T10/144

摘要： The system for controlling the fuel/air mixture supplied to a lean burn engine when operating on natural gas, gasoline, hydrogen, alcohol, propane, butane, diesel or any other fuel as desired. As specific humidity of air supplied to the lean burn engine increases, the oxygen concentration of exhaust gas discharged by the engine for a given equivalence ratio will decrease. Closed loop fuel control systems typically attempt to maintain a constant exhaust gas oxygen concentration. Therefore, the decrease in the exhaust gas oxygen concentration resulting from increased specific humidity will often be improperly attributed to an excessive supply of fuel and the control system will incorrectly reduce the amount of fuel supplied to the engine. Also, the minimum fuel/air equivalence ratio for a lean burn engine to avoid misfiring will increase as specific humidity increases. A relative humidity sensor to allow the control system to provide a more enriched fuel/air mixture at high specific humidity levels. The level of specific humidity may be used to compensate an output signal from a universal exhaust gas oxygen sensor for changing oxygen concentrations at a desired equivalence ratio due to variation in specific humidity specific humidity. As a result, the control system will maintain the desired efficiency, low exhaust emissions and power level for the associated lean burn engine regardless of the specific humidity level of intake air supplied to the lean burn engine.

摘要翻译： 当根据需要对天然气，汽油，氢气，酒精，丙烷，丁烷，柴油或任何其他燃料进行操作时，控制供应给稀燃燃烧发动机的燃料/空气混合物的系统。 当供给到稀薄燃烧发动机的空气的比湿度增加时，由发动机以给定的当量比排出的废气的氧气浓度将降低。 闭环燃料控制系统通常试图维持恒定的废气氧浓度。 因此，由于特定湿度的增加导致的排气氧浓度的降低常常不正确地归因于燃料的过量供给，并且控制系统将不正确地减少供给发动机的燃料量。 此外，稀释燃烧发动机的最小燃料/空气当量比，以避免失火将随着特定湿度的增加而增加。 相对湿度传感器，允许控制系统在高比湿度水平下提供更多的富燃料/空气混合物。 可以使用比湿度的水平来补偿来自通用排气氧传感器的输出信号，用于由于特定湿度比湿度的变化而以期望的当量比改变氧气浓度。 结果，无论供应给稀燃发动机的进气的特定湿度水平如何，控制系统将保持所关联的稀薄燃烧发动机的期望效率，低废气排放和功率水平。