Acceleration based misfire detection system and method with improved
signal fidelity
    2.
    发明授权
    Acceleration based misfire detection system and method with improved signal fidelity 失效
    基于加速度的失火检测系统和具有改进的信号保真度的方法

    公开(公告)号:US5515720A

    公开(公告)日:1996-05-14

    申请号:US279966

    申请日:1994-07-25

    CPC分类号: G01M15/11

    摘要: An acceleration based misfire detection system with improved signal fidelity comprises a measurement device (421, 423, 425, 427) for determining an operating condition of the powertrain (401). The operating condition can include engine speed, engine load, as well as other conditions. A misfire detector (417) provides a misfire indication (419) dependent on an improved fidelity acceleration signal (415). The improved fidelity acceleration signal (415) is provided by either a median filter (413) operating on an acceleration signal (411) where the median filter's rank is programmable dependent on the determined operating condition of the powertrain, a highpass filter operating on an acceleration signal (411) where the highpass filter's order is programmable dependent on the determined operating condition of the powertrain, or from an acceleration determination device (409) acting on velocity information provided by a lowpass filter (407) operating on a velocity signal (406) where the lowpass filter's order is programmable dependent on the determined operating condition of the powertrain, or a combination of the above.

    摘要翻译: 具有改善的信号保真度的基于加速度的失火检测系统包括用于确定动力系(401)的操作状态的测量装置(421,423,425,427)。 运行条件可以包括发动机转速,发动机负荷以及其他条件。 失火探测器(417)根据改进的保真加速度信号(415)提供失火指示(419)。 改进的保真加速度信号(415)由操作在加速度信号(411)上的中值滤波器(413)提供,其中中值滤波器的秩可编程,取决于所确定的动力系的运行条件,运行在加速度上的高通滤波器 信号(411),其中高通滤波器的顺序可根据所确定的动力系的操作条件或来自加速度确定装置(409)而起作用的作用在由速度信号(406)上操作的低通滤波器(407)提供的速度信息上, 其中低通滤波器的顺序可根据动力总成的确定的操作条件或上述的组合来编程。

    Apparatus and method for variable windowed peak detection in a misfire
detection system
    3.
    发明授权
    Apparatus and method for variable windowed peak detection in a misfire detection system 失效
    在失火检测系统中可变窗口峰值检测的装置和方法

    公开(公告)号:US5508927A

    公开(公告)日:1996-04-16

    申请号:US280101

    申请日:1994-07-25

    CPC分类号: G01M15/11

    摘要: An apparatus, and a corresponding method, for determining misfire in a reciprocating engine operates on a selectable quantity of discrete sampled acceleration signals that are indicative of acceleration behavior of the reciprocating engine. A decimation device selects a quantity of the discrete sampled acceleration signals dependent on an engine family, and optionally engine operating conditions such as speed and load. An accelearation signal is selected from the sampled acceleration signals, preferably the sample having the most negative magnitude. A misfire determination device provides a misfire indication dependent on the selected acceleration signal.

    摘要翻译: 用于确定往复式发动机中的失火的装置和相应的方法对可选择量的表示往复式发动机的加速行为的离散采样加速度信号进行操作。 抽取装置选择取决于发动机系列的离散采样加速度信号的数量,以及可选的发动机操作条件,例如速度和负载。 从采样的加速度信号中选择加权信号,优选地,具有最负的幅度的样本。 失火判定装置根据所选择的加速度信号提供失火指示。

    Misfire detection method and apparatus therefor
    4.
    发明授权
    Misfire detection method and apparatus therefor 失效
    失火检测方法及其装置

    公开(公告)号:US5503007A

    公开(公告)日:1996-04-02

    申请号:US955780

    申请日:1992-10-05

    IPC分类号: G01M15/11 G01M15/00

    摘要: A method for detecting a misfire condition by interpreting acceleration of an engine crankshaft (301) is described. The method teaches measurement of a first engine crankshaft acceleration, (405) proximate a first predetermined engine crankshaft angle, and provides a first reading (407) indicative of the first engine crankshaft acceleration, measurement of a second engine crankshaft acceleration, (417) proximate a second predetermined engine crankshaft angle, and provides a second reading (419) indicative of the second engine crankshaft acceleration, then combines (421) the first reading and the second reading and provides an acceleration coefficient (423) indicative of the combined readings. Then, a misfire is indicated (427) when the acceleration coefficient does not exceed a predetermined limit.

    摘要翻译: 描述了通过解释发动机曲轴(301)的加速度来检测失火状态的方法。 该方法教导了接近第一预定发动机曲轴角度的第一发动机曲轴加速度(405)的测量值,并提供指示第一发动机曲轴加速度的第一读数(407),第二发动机曲轴加速度的测量值(417) 第二预定的发动机曲轴角度,并且提供指示第二发动机曲轴加速度的第二读数(419),然后组合(421)第一读数和第二读数,并提供指示组合读数的加速系数(423)。 然后,当加速系数不超过预定极限时,指示失火(427)。

    Misfire detection dependent on intake air charge fluctuations
    5.
    发明授权
    Misfire detection dependent on intake air charge fluctuations 失效
    取决于进气充气波动的失火检测

    公开(公告)号:US5616834A

    公开(公告)日:1997-04-01

    申请号:US591838

    申请日:1996-01-25

    IPC分类号: G01M15/09 G01M15/00

    CPC分类号: G01M15/09

    摘要: A misfire detection system and method measures fluctuations of air charge ingested into an engine 303, preferably as fluctuations of the engine's intake air pressure or as fluctuations of the mass air flow. A misfire indication 337 is provided dependent on a behavior of the fluctuations of air charge. Preferably, to eliminate errors associated with engine transient operating conditions, such as acceleration, the fluctuations of air charge are differentiated 325 before a misfire detection mechanism 333 is used to determine misfire behavior.

    摘要翻译: 失火检测系统和方法测量摄入发动机303的空气的波动,优选地是发动机进气压力的波动或大气流的波动。 取决于空气充气的波动的行为来提供失火指示337。 优选地,为了消除与发动机瞬态操作条件(例如加速度)相关联的错误,在使用失火检测机构333以确定失火行为之前,充气的波动被区分325。

    Knock detection system
    9.
    发明授权
    Knock detection system 失效
    敲击检测系统

    公开(公告)号:US5400644A

    公开(公告)日:1995-03-28

    申请号:US953428

    申请日:1992-09-29

    IPC分类号: G01L23/22

    CPC分类号: G01L23/225

    摘要: A system for detecting the presence of a knock condition by interpreting a broadband spectra signal as measured from an internal combustion engine is described. The system includes a spectra measurement device, preferably an accelerometer (101) mounted to an engine for providing a broadband spectra signal (103) to a knock detector (105). Preferably the knock detector (105) is based on a digital signal processor. The signal (103) is provided simultaneously to knock discrimination elements (405, 409, and 413), that provide a knock spectra signal (415) representative of the average energy within a predetermined knock spectra, and noise discrimination elements (417, 421, and 425), that provide a noise spectra signal (427) representative of average energy within a predetermined noise spectra. The knock spectra signal (415) is combined with the noise spectra signal (427) to provide a knock signal (431) when an engine knocking condition is detected.

    摘要翻译: 描述了通过解释从内燃机测得的宽带频谱信号来检测爆震条件的存在的系统。 该系统包括光谱测量装置,优选地安装到发动机的加速度计(101),用于向爆震检测器(105)提供宽带光谱信号(103)。 优选地,爆震检测器(105)基于数字信号处理器。 同时提供信号(103)以敲击识别元件(405,409和413),其提供表示预定爆震频谱内的平均能量的爆震谱信号(415),以及噪声识别元件(417,421, 和425),其提供表示预定噪声谱内的平均能量的噪声谱信号(427)。 当检测到发动机爆震条件时,爆震频谱信号(415)与噪声频谱信号(427)组合以提供爆震信号(431)。