Electronic throttle plate index position determination for improved airflow correlation over various temperature conditions
    2.
    发明授权
    Electronic throttle plate index position determination for improved airflow correlation over various temperature conditions 有权
    电子节气门板指数位置确定,以改善各种温度条件下的气流相关性

    公开(公告)号:US06751567B2

    公开(公告)日:2004-06-15

    申请号:US09995076

    申请日:2001-11-26

    IPC分类号: G01K1500

    摘要: A system (12) and method for determining the closed position of a throttle plate 52 of an internal combustion engine (10) are provided. The system (12) includes a throttle sensor (56), a temperature sensor (70 or 86), and an electronic control unit (ECU) (72). The throttle sensor (56) generates a signal indicative of the position of the throttle plate (52). The temperature sensor (70 or 86) generates a signal indicative of the temperature of a throttle body (50) of the engine (10). The ECU (72) is configured to select one of a first closed position value indicated by throttle sensor (56) signal and a second closed position value retrieved from a memory (94) responsive to the measured temperature. The inventive system is able to minimize inaccuracies in throttle plate position detection by eliminating errors resulting from a change in geometry between the throttle plate (52) and the throttle body (50) of the engine during relatively high temperatures.

    摘要翻译: 提供一种用于确定内燃机(10)的节流板52的关闭位置的系统(12)和方法。 系统(12)包括节流传感器(56),温度传感器(70或86)和电子控制单元(ECU)72。 节流传感器(56)产生指示节流板(52)的位置的信号。 温度传感器(70或86)产生指示发动机(10)的节气门体(50)的温度的信号。 ECU(72)被配置为响应于测量的温度来选择由节流传感器(56)信号指示的第一关闭位置值和从存储器(94)检索的第二关闭位置值中的一个。 本发明的系统能够通过消除在相对较高的温度期间在节流板(52)和发动机的节气门体(50)之间的几何形状的变化导致的误差来最小化节气门板位置检测的不准确度。

    Throttle valve position determination using accelerator pedal position
    3.
    发明授权
    Throttle valve position determination using accelerator pedal position 有权
    节气门位置确定使用加速踏板位置

    公开(公告)号:US06651621B2

    公开(公告)日:2003-11-25

    申请号:US10004036

    申请日:2001-12-06

    IPC分类号: F02D100

    摘要: A closed throttle position of a vehicle internal combustion engine is determined by storing a plurality of signal values representative of previous foot-off position values of an accelerator pedal (10) within a normal range of pedal positions, determining a current foot-off position value of the accelerator pedal, comparing the current foot-off position value to an average of the previous stored foot-off position values, and using the average as the closed pedal position to determine a closed throttle position when the comparison is indicative of an abnormal pedal position.

    摘要翻译: 通过将表示加速器踏板(10)的先前脚踏板位置值的多个信号值存储在踏板位置的正常范围内来确定车辆内燃机的关闭节气门位置,确定当前的踏板位置值 比较当前的踏脚位置值与先前存储的踏板位置值的平均值,并且使用平均值作为闭合踏板位置来确定当比较指示异常踏板时的闭合节气门位置 位置。

    Airflow balance for a twin turbocharged engine system
    5.
    发明授权
    Airflow balance for a twin turbocharged engine system 有权
    双涡轮增压发动机系统的气流平衡

    公开(公告)号:US07640794B2

    公开(公告)日:2010-01-05

    申请号:US11851113

    申请日:2007-09-06

    IPC分类号: G01M19/00

    摘要: As one example, a method of operating an engine system including a first air intake passage branch including a first compression device and a second air intake passage branch including a second compression device, wherein each of the first branch and the second branch are fluidly coupled to at least a combustion chamber the engine via a common intake passage, a first sensor arranged along the first branch and at least a second sensor arranged along the common intake passage, wherein the first sensor is a mass airflow sensor and wherein the second branch does not include a mass airflow sensor. The method comprises increasing the mass airflow through the first branch relative to the mass airflow through the second branch when an amount of decrease in the mass airflow through the first branch is more than half an amount of a corresponding decrease in the combined mass airflow.

    摘要翻译: 作为一个例子,涉及一种操作发动机系统的方法,所述发动机系统包括第一进气通道分支,所述第一进气通道分支包括第一压缩装置和包括第二压缩装置的第二进气通道分支,其中第一分支和第二分支中的每一个流体地联接到 至少燃烧室,发动机经由公共进气通道,沿着第一分支布置的第一传感器和沿着公共进气通道布置的至少第二传感器,其中第一传感器是质量气流传感器,并且其中第二分支不 包括质量气流传感器。 当通过第一分支的质量气流的减少量大于组合质量空气流的相应减少量的一半量时,该方法包括相对于通过第二分支的质量气流增加通过第一分支的质量气流。

    Method and system for transitioning between lean and stoichiometric operation of a lean-burn engine

    公开(公告)号:US06604504B2

    公开(公告)日:2003-08-12

    申请号:US09884383

    申请日:2001-06-19

    IPC分类号: F02B1700

    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
    7.
    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

    IPC分类号: F01N300

    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
    8.
    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

    IPC分类号: F01N300

    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
    9.
    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

    IPC分类号: F01N300

    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。