Catalyst deterioration detecting apparatus
    4.
    发明授权
    Catalyst deterioration detecting apparatus 有权
    催化剂劣化检测装置

    公开(公告)号:US06892528B2

    公开(公告)日:2005-05-17

    申请号:US10672691

    申请日:2003-09-26

    摘要: A catalyst deterioration detecting apparatus aims at accurately determining whether or not a catalyst deteriorates even if a strict standard for catalyst deterioration is established. The catalyst deterioration detecting apparatus includes catalyst temperature sensing means for obtaining temperature of a catalyst, including ceria (CeO2) serving as an oxygen storage agent, and deterioration detecting means for detecting a degree of deterioration of the catalyst if the temperature is obtained by the catalyst temperature sensing means is equal to or higher than an activation temperature at which the catalyst is activated and is in a particular temperature range causing NOX conversion efficiency of the catalyst to decrease.

    摘要翻译: 催化剂劣化检测装置即使在确定催化剂劣化的严格标准的情况下,也能准确地判定催化剂是否劣化。 催化剂劣化检测装置包括用于获得催化剂的温度的催化剂温度检测装置,包括用作氧气储存剂的二氧化铈(CeO 2/2))和用于检测催化剂劣化程度的劣化检测装置 如果通过催化剂温度检测装置获得的温度等于或高于催化剂活化的活化温度并且在特定的温度范围内,使催化剂的NO x转化率降低 。

    Exhaust emission control device of internal combustion engine

    公开(公告)号:US20070000482A1

    公开(公告)日:2007-01-04

    申请号:US10550520

    申请日:2003-10-17

    IPC分类号: F02D41/14

    CPC分类号: F02D41/1454

    摘要: The air/fuel ratio of exhaust flowing into a catalytic converter is forcibly modulated, between a lean air/fuel ratio leaner than a target average air/fuel ratio and a rich air/fuel ratio richer than the target average air/fuel ratio, with a specific period, a specific amplitude, a specific modulation ratio and a specific waveform. During the forcible modulation (S10, S12), the ratio of a time for which the output of an oxygen sensor is greater than a standard value Sb for the output set between the maximum and minimum values of the output (“rich” output time), or of a time for which it is smaller than the standard value Sb (“lean” output time), in a predetermined period of time, or a value correlating with this ratio is obtained (S14), and the air/fuel ratio of the exhaust is controlled on the basis of this ratio or the value correlating with this ratio (S16, S18).

    Exhaust emission control apparatus for internal combustion engine
    8.
    发明授权
    Exhaust emission control apparatus for internal combustion engine 失效
    内燃机用废气排放控制装置

    公开(公告)号:US06968677B2

    公开(公告)日:2005-11-29

    申请号:US10387498

    申请日:2003-03-14

    申请人: Yasuki Tamura

    发明人: Yasuki Tamura

    摘要: There is provided an exhaust emission control apparatus for an internal combustion engine, which includes a failure diagnostic device that fixes three parameters selected from the group consisting of the engine speed detected by an engine speed detecting device, the fuel quantity controlled by a fuel quantity control device, the ignition timing controlled by an ignition timing control device, and the intake air volume controlled by an intake air control device at respective predetermined values, and finds values of the remaining one parameter, and compares the values of the remaining one parameter with each other to determine whether an exhaust flow control apparatus has failed or not.

    摘要翻译: 提供了一种用于内燃机的废气排放控制装置,其包括故障诊断装置,该故障诊断装置固定从由发动机转速检测装置检测的发动机转速,燃料量控制 装置,由点火正时控制装置控制的点火正时和由进气控制装置以各自的预定值控制的进气量,并找出剩余的一个参数的值,并将剩余的一个参数的值与每个 另一个来确定排气流量控制装置是否有故障。

    Exhaust emission control system for multiple cylinder internal combustion engine
    10.
    发明授权
    Exhaust emission control system for multiple cylinder internal combustion engine 失效
    多缸内燃机废气排放控制系统

    公开(公告)号:US06840035B2

    公开(公告)日:2005-01-11

    申请号:US10374108

    申请日:2003-02-27

    申请人: Yasuki Tamura

    发明人: Yasuki Tamura

    摘要: An exhaust emission control system for an internal combustion engine includes an exhaust air-fuel ratio changing device switching the exhaust air-fuel ratio of exhaust gas flowing into one of an upstream exhaust passages and the exhaust air-fuel ratio of exhaust gas flowing into the other one of the upstream exhaust passages to a rich air-fuel ratio and to a lean air-fuel ratio alternately on a predetermined cycle longer than each of combustion cycles of the internal combustion engine, to thereby determine whether upstream catalytic converters have deteriorated or not according to a change in the exhaust air-fuel ratio outputted by upstream exhaust sensors provided downstream of the upstream catalytic converters. Therefore, it is possible to surely determine whether catalytic converters have deteriorated even slightly or not while ensuring a high exhaust emission control performance.

    摘要翻译: 用于内燃机的废气排放控制系统包括:排气空气比变更装置,其切换流入上游侧排气通路中的一方的废气的排出空燃比和流入上游排气通道的废气排气空燃比 上游排气通道中的另一个以比内燃机的每个燃烧循环更长的预定循环交替地具有浓空燃比和稀空燃比,从而确定上游催化转化器是否劣化 根据设置在上游催化转化器下游的上游排气传感器输出的排气空燃比的变化。 因此,在确保高废气排放控制性能的同时,可以确定催化转化器是否甚至稍微劣化。