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    Method and apparatus for improving engine fuel economy
    2.
    发明授权
    Method and apparatus for improving engine fuel economy 失效
    提高发动机燃油经济性的方法和装置

    公开(公告)号：US5778666A

    公开(公告)日：1998-07-14

    申请号：US843948

    申请日：1997-04-17

    申请人： Michael John Cullen ,  David George Farmer ,  Gopichandra Surnilla ,  Susan Nicole Cok

    发明人： Michael John Cullen ,  David George Farmer ,  Gopichandra Surnilla ,  Susan Nicole Cok

    IPC分类号： F02D45/00 ,  F01N3/08 ,  F02D41/02 ,  F02D41/14 ,  F01N3/20

    CPC分类号： F01N3/0842 ,  F02D41/027 ,  F02D41/028 ,  F02D41/2441 ,  F02D41/2454 ,  F02D41/2461 ,  F01N2570/04 ,  F02D2041/1411 ,  F02D2200/0818 ,  Y02T10/24

    摘要： A managed fuel air mode control system is provided which operates in an open loop lean mode of operation whenever open loop enable criteria is met. During the open loop lean mode of operation, a rich A/F purge mode of operation is dictated when a NO.sub.x trap is determined to be full. After purging the trap, engine operation returns to stoichiometric and either enters a closed loop learning operation or returns to lean operation depending upon the time that has passed since the last learning operation. During the learning operation, an adaptive control algorithm learns or updates a long term correction factor that is used during the open loop lean A/F mode of operation. Also during open loop operation, the amount of SO.sub.x accumulated in the trap is calculated and the open loop mode is terminated when the amount of SO.sub.x exceed a threshold.

    摘要翻译： 提供了一种管理的燃料空气模式控制系统，其在满足开环允许标准的情况下以开环稀薄操作模式操作。 在开环稀薄操作模式期间，当NOx捕集器被确定为满时，规定了丰富的A / F净化操作模式。 清除陷阱后，发动机运转返回化学计量，并进入闭环学习操作，或根据自上次学习操作以来经过的时间返回到精益操作。 在学习操作期间，自适应控制算法学习或更新在开环精益A / F操作模式期间使用的长期校正因子。 同样在开环操作期间，计算陷阱中积累的SOx量，并且当SOx的量超过阈值时，开环模式终止。

    Method and system for transitioning between lean and stoichiometric operation of a lean-burn engine
    3.
    发明授权
    Method and system for transitioning between lean and stoichiometric operation of a lean-burn engine 有权

    公开(公告)号：US06604504B2

    公开(公告)日：2003-08-12

    申请号：US09884383

    申请日：2001-06-19

    申请人： Gopichandra Surnilla ,  David George Farmer

    发明人： Gopichandra Surnilla ,  David George Farmer

    IPC分类号： F02B1700

    CPC分类号： F02D41/008 ,  F01N3/0842 ,  F02D37/02 ,  F02D41/0002 ,  F02D41/0275

    摘要： An exhaust treatment system for an internal combustion engine includes a catalytic emission control device. When transitioning the engine between a lean operating condition and a stoichiometric operating condition, as when scheduling a purge of the downstream device to thereby release an amount of a selected exhaust gas constituent, such as NOx, that has been stored in the downstream device during the lean operating condition, the air-fuel ratio of the air-fuel mixture supplied to each cylinder is sequentially stepped from an air-fuel ratio of at least about 18 to the stoichiometric air-fuel ratio. The purge event is preferably commenced when all but one cylinders has been stepped to stoichiometric operation, with the air-fuel mixture supplied to the last cylinder being stepped immediately to an air-fuel ratio rich of a stoichiometric air-fuel ratio.

    Method and system for preconditioning an emission control device for operation about stoichiometry
    4.
    发明授权
    Method and system for preconditioning an emission control device for operation about stoichiometry 有权
    用于预处理排放控制装置以用于化学计量的操作的方法和系统

    公开(公告)号：US06796117B2

    公开(公告)日：2004-09-28

    申请号：US10264034

    申请日：2002-10-03

    申请人： David George Farmer ,  Gopichandra Surnilla

    发明人： David George Farmer ,  Gopichandra Surnilla

    IPC分类号： F01N300

    CPC分类号： F01N3/0842 ,  F01N13/009 ,  F01N13/0097 ,  F01N2570/16 ,  F02D41/0275 ,  F02D41/1441 ,  F02D41/187 ,  F02D2041/389 ,  Y02T10/22

    摘要： An exhaust gas treatment system for an internal combustion engine includes a three-way catalyst and a NOx device located downstream of the three-way catalyst. The device is preconditioned for emissions reduction at engine operating conditions about stoichiometry by substantially filling the device with oxygen and NOx; and purging stored oxygen and stored NOx from only an upstream portion of the device, whereupon the upstream portion of the device operates to store oxygen and NOx during subsequent lean transients while the downstream portion of the device operates to reduce excess HC and CO during subsequent rich transients.

    摘要翻译： 用于内燃机的废气处理系统包括位于三元催化剂下游的三元催化剂和NOx装置。 该装置通过用氧气和氮氧化物基本上填充该装置来预处理关于化学计量的发动机运行条件下的排放减少; 并且仅从装置的上游部分清除储存的氧气和储存的NOx，于是装置的上游部分在随后的稀薄瞬变期间操作以存储氧气和NOx，同时装置的下游部分在随后的富集期间减少过量的HC和CO 瞬变。

    Method and system for operating dual-exhaust engine
    5.
    发明授权
    Method and system for operating dual-exhaust engine 有权
    双排气发动机运行方法和系统

    公开(公告)号：US06467259B1

    公开(公告)日：2002-10-22

    申请号：US09884563

    申请日：2001-06-19

    申请人： Gopichandra Surnilla ,  David George Farmer

    发明人： Gopichandra Surnilla ,  David George Farmer

    IPC分类号： F01N300

    CPC分类号： F02D41/0082 ,  F01N3/0842 ,  F01N13/009 ,  F01N13/0097 ,  F01N13/011 ,  F02D41/0275 ,  F02D41/1443 ,  F02D2041/389

    摘要： An exhaust gas treatment system for an internal combustion engine includes a pair of upstream emission control devices which respectively receive the exhaust gas generated by a respective group of cylinders, and a single, shared downstream emission control device receiving catalyzed exhaust gas from each of the upstream emission control devices. After the downstream device stores a selected constituent gas generated when each cylinder group is operating “lean,” the downstream device is purged by operating the first cylinder group with a stoichiometric air-fuel mixture while operating the second cylinder group with a rich air-fuel mixture, such that the combined catalyzed exhaust gas flowing through the downstream device during the purge event has an air-fuel ratio slightly rich of stoichiometry. As a result, the invention improves overall vehicle fuel economy because only one of the upstream devices is purged of stored oxygen when purging the downstream device of previously-stored constituent gas.

    摘要翻译： 用于内燃机的废气处理系统包括分别接收由相应气缸组产生的废气的一对上游排放控制装置，以及从上游侧的每一个接收催化废气的单个共用下游排放控制装置 排放控制装置。 在下游装置存储当每个气缸组正在运行时产生的所选择的构成气体“稀薄”时，通过用化学计量空气 - 燃料混合物操作第一气缸组来清洗下游装置，同时用富空燃料操作第二气缸组 使得在净化事件期间流过下游装置的合并的催化废气具有略高于化学计量的空燃比。 结果，本发明提高了总体车辆燃料经济性，因为当清除预先存储的构成气体的下游装置时，只有一个上游装置被清除存储的氧气。

    Emission device temperature control system
    6.
    发明授权
    Emission device temperature control system 有权
    排放装置温度控制系统

    公开(公告)号：US06189316B1

    公开(公告)日：2001-02-20

    申请号：US09315223

    申请日：1999-05-19

    申请人： Gopichandra Surnilla ,  David George Farmer

    发明人： Gopichandra Surnilla ,  David George Farmer

    IPC分类号： F01N300

    CPC分类号： F02D41/008 ,  F01N3/0842 ,  F01N13/009 ,  F01N13/011 ,  F01N2570/04 ,  F02D41/028 ,  F02D41/1446 ,  F02D2200/0802

    摘要： A nitrous oxide trap temperature control system for desulfating the trap uses and engine with some cylinders operating with lean combustion and some cylinders operating with rich combustion. The lean and rich combustion gases are combined to form an mixture which is fed to the trap to provide an exothermic reaction. The desired lean and rich air/fuel ratios of the respective lean and rich cylinders are limited depending on trap temperature and incremental heat addition to prevent inadvertently decreasing trap temperature.

    摘要翻译： 用于脱硫捕集器的一氧化二氮捕集温度控制系统和发动机，其中一些气缸以贫燃燃烧运行，一些气缸以丰富的燃烧运行。 将贫和富燃烧气体合并形成混合物，将其送入捕集器以提供放热反应。 根据捕集温度和增加的热量添加量，相应的稀薄和富含气瓶的期望的稀薄和较浓的空气/燃料比受到限制，以防止无意中降低捕集阱温度。

    Engine control system for a lean burn engine having fuel vapor recovery
    7.
    发明授权
    Engine control system for a lean burn engine having fuel vapor recovery 失效
    用于具有燃料蒸汽回收的稀薄燃烧发动机的发动机控制系统

    公开(公告)号：US5765541A

    公开(公告)日：1998-06-16

    申请号：US826608

    申请日：1997-04-03

    申请人： David George Farmer ,  Gopichandra Surnilla ,  Daniel V. Orzel

    发明人： David George Farmer ,  Gopichandra Surnilla ,  Daniel V. Orzel

    IPC分类号： F02D41/00 ,  F02D41/24 ,  F02M25/08 ,  F02M33/04 ,  F02D41/14

    CPC分类号： F02D41/2451 ,  F02D41/0042 ,  F02D41/2441 ,  F02M25/08

    摘要： Fuel vapors are purged from a fuel system into an engine air/fuel intake and the mass flow of such vapors are adaptively learned during a fuel vapor learning mode. When operating in a lean air/fuel operating mode, the lean mode is periodically disabled and the fuel vapor learning mode periodically enabled to update the measurement of inducted fuel vapors. Fuel delivery to the engine is corrected by such measurement to compensate for inducted fuel vapors and maintain engine operation at the desired air/fuel ratio.

    摘要翻译： 燃料蒸汽从燃料系统被吹扫到发动机空气/燃料进口中，并且在燃料蒸气学习模式期间自适应地学习这种蒸汽的质量流量。 当在稀薄空气/燃料运行模式下操作时，周期性地禁用稀薄模式，并且周期性地启用燃料蒸气学习模式以更新引入的燃料蒸汽的测量。 通过这种测量校正向发动机的燃料输送，以补偿引入的燃料蒸汽并且以期望的空气/燃料比维持发动机运行。