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    Method and apparatus for enhancing fuel economy of a lean burn internal combustion engine
    1.
    发明授权
    Method and apparatus for enhancing fuel economy of a lean burn internal combustion engine 有权
    提高稀燃内燃机燃油经济性的方法和装置

    公开(公告)号：US06594989B1

    公开(公告)日：2003-07-22

    申请号：US09531096

    申请日：2000-03-17

    申请人： Jeffrey Scott Hepburn ,  Gopichandra Surnilla ,  Jerry D. Robichaux ,  Michael John Cullen

    发明人： Jeffrey Scott Hepburn ,  Gopichandra Surnilla ,  Jerry D. Robichaux ,  Michael John Cullen

    IPC分类号： F01N300

    CPC分类号： F01N3/0864 ,  B01D53/9431 ,  B01D53/9495 ,  F01N3/0814 ,  F01N3/0842 ,  F01N13/009 ,  F01N13/0097 ,  F02D41/0275 ,  F02D41/1463 ,  F02D2200/0808 ,  F02D2200/0811 ,  F02D2200/0816

    摘要： A method and apparatus for controlling the operation of a “lean-burn” internal combustion engine in cooperation with an exhaust gas purification system having an emissions control device capable of alternatively storing and releasing NOx when exposed to exhaust gases that are lean and rich of stoichiometry, respectively, optimizes vehicle fuel economy while complying with emissions standards by prohibiting lean engine operation only when tailpipe emissions, calculated in terms of grams of an exhaust gas constituent per vehicle mile traveled, exceeds a permissible threshold value. The threshold value is preferably itself periodically determined based upon a detected or determined level of vehicle activity, such that vehicle activity characterized by greater transient engine operation prescribes a relatively lower level of permissible vehicle emissions.

    摘要翻译： 与具有排放控制装置的废气净化系统协同控制“稀燃”内燃机的操作的方法和装置，当排放气体暴露于稀薄且浓度较高的化学计量 分别优化车辆燃料经济性，同时遵循排放标准，只有当以每车辆行驶的废气成分的克数计算的排气排放超过允许的阈值时，禁止精益发动机运行。 优选地，阈值本身基于检测到的或确定的车辆活动水平来周期性地确定，使得以更大的瞬时发动机操作为特征的车辆活动规定相对较低水平的可允许车辆排放。

    Method and system for reducing vehicle tailpipe emissions when operating lean
    3.
    发明授权
    Method and system for reducing vehicle tailpipe emissions when operating lean 失效
    运行精益时减少车辆尾气排放的方法和系统

    公开(公告)号：US06453666B1

    公开(公告)日：2002-09-24

    申请号：US09884241

    申请日：2001-06-19

    申请人： Gopichandra Surnilla ,  Jeffrey Scott Hepburn ,  Jerry D. Robichaux ,  Michael John Cullen

    发明人： Gopichandra Surnilla ,  Jeffrey Scott Hepburn ,  Jerry D. Robichaux ,  Michael John Cullen

    IPC分类号： F01N300

    CPC分类号： F02D41/0275 ,  F01N3/0842 ,  F01N2900/1612

    摘要： A method and system for operating a lean-burn internal combustion engine in cooperation with an exhaust gas purification system having an emission control device, wherein the system includes a controller which calculates current levels of a selected exhaust gas constituent, such as NOx, during lean engine operating conditions based upon the difference between a determined instantaneous feedgas NOx concentration and a determined instantaneous device efficiency. The controller discontinues lean engine operation when the tailpipe NOx, expressed in terms of either grams-per-mile or grams-per-hour, exceeds a predetermined threshold level, either instantaneously or as averaged over the course of a device purge-fill cycle.

    摘要翻译： 与具有排放控制装置的排气净化系统协同操作稀燃内燃机的方法和系统，其中所述系统包括控制器，所述控制器在稀薄的排气系统中计算所选择的排气组分如NO x的电流水平 基于确定的瞬时进料气体NOx浓度与确定的瞬时装置效率之间的差异的发动机操作条件。 当在装置吹扫 - 填充循环的过程中，瞬时地或以平均值计算的尾管NOx（以克/英里/克/小时为单位表示）超过预定阈值水平时，控制器停止精馏发动机操作。

    Method and apparatus for controlling lean operation of an internal combustion engine
    5.
    发明授权
    Method and apparatus for controlling lean operation of an internal combustion engine 失效
    用于控制内燃机的精馏操作的方法和装置

    公开(公告)号：US06434930B1

    公开(公告)日：2002-08-20

    申请号：US09528045

    申请日：2000-03-17

    申请人： Michael John Cullen ,  David Karl Bidner ,  Gopichandra Surnilla ,  Jeffrey Scott Hepburn ,  Jerry D. Robichaux

    发明人： Michael John Cullen ,  David Karl Bidner ,  Gopichandra Surnilla ,  Jeffrey Scott Hepburn ,  Jerry D. Robichaux

    IPC分类号： F01N300

    CPC分类号： F01N3/0842 ,  F02D41/0275 ,  F02D41/1441 ,  F02D41/146 ,  F02D41/1462 ,  F02D41/1463 ,  Y02T10/22

    摘要： A method and system for controlling the operation of “lean-burn” internal combustion engines determines a current rate of vehicle NOx emissions, and determines a threshold value for permissible vehicle NOx emissions based on at least one current value for the intake air-fuel ratio, engine speed, engine load (e.g., brake torque, manifold air pressure, or throttle position), and/or vehicle speed. A differential NOx emissions rate is calculated as the difference between the current rate and the threshold rate, and the differential rate is accumulated over time to obtain a differential measure representing the amount by which cumulative NOx emissions have fallen below permissible levels therefor. Lean engine operation is disabled when the differential NOx emissions measure exceeds a predetermined excess vehicle NOx emission value. In this manner, vehicle NOx emissions are favorably controlled even when the engine is operated “off-cycle,” i.e., under operating conditions falling outside of the FTP driving cycles.

    摘要翻译： 用于控制“稀燃”内燃机的运行的方法和系统确定车辆NOx排放的当前速率，并且基于进气空燃比的至少一个当前值来确定允许的车辆NOx排放的阈值 ，发动机转速，发动机负载（例如，制动转矩，歧管空气压力或节气门位置）和/或车辆速度。 差分NOx排放率被计算为当前速率和阈值比率之间的差异，并且差分速率随时间累积以获得表示累积NOx排放量已经低于其允许水平的量的差异量度。 当差示NOx排放量超过预定的过量车辆NOx排放值时，精益引擎操作被禁用。 以这种方式，即使当发动机“非循环”操作时，即在脱离FTP驱动循环的操作条件下，车辆NOx排放也被有利地控制。