-
公开(公告)号：US06456927B1
公开(公告)日：2002-09-24
申请号：US08035348
申请日：1993-03-22
IPC分类号： G06F1900
CPC分类号： G01L23/225
摘要： A spectral method, and corresponding system, for knock detection includes acquiring (603) spectral energy associated with vibration caused by a knocking condition from a running engine. Preferably, a sampled data system (105) acquires the spectral energy by converting an output from an accelerometer (101) into data samples (103) in a digital form. Then from the acquired spectral energy, a knock variable is derived from magnitudes of spectral components, representing a characteristic of a combustion chamber located within the running engine. In a preferred embodiment the knock variable is derived from magnitudes of spectral components related by ratios corresponding to Bessel function coefficients. The preferred embodiment includes a Digital Signal Processor (109) applying a Fast Fourier Transform method (503) to estimate a spectral content used to determine the knock variable. Then, a knock indication is provided (509) when the knock variable exceeds a magnitude of a predetermined threshold (507). Other embodiments include provision for providing a knock indication when a knock variable (703) derived from magnitudes of individual spectral components corresponding to characteristic knock spectra associated with acquired spectral energy exceeds a magnitude of a trended time weighted version of the knock variable by a predetermined magnitude (709).
摘要翻译： 用于爆震检测的光谱方法和相应的系统包括获取（603）与来自运行发动机的爆震条件引起的振动相关的光谱能量。 优选地，采样数据系统（105）通过将加速度计（101）的输出转换成数字形式的数据采样（103）来获取频谱能量。 然后从所获得的光谱能量中，根据频谱分量的大小导出爆震变量，表示位于运行发动机内的燃烧室的特性。 在一个优选实施例中，爆震变量源自与贝塞尔函数系数对应的比率相关的频谱分量的大小。 优选实施例包括应用快速傅立叶变换方法（503）来估计用于确定爆震变量的频谱含量的数字信号处理器（109）。 然后，当爆震变量超过预定阈值的幅度（507）时，提供敲击指示（509）。 其他实施方案包括当从衍生自对应于与所获得的光谱能量相关联的特征性爆震谱的各个光谱成分的量级的爆震变量（703）超过爆震变量的趋势时间加权版本的预定量值的爆震变量 （709）。
-
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）。
-
公开(公告)号：US5387253A
公开(公告)日：1995-02-07
申请号：US997431
申请日：1992-12-28
CPC分类号： G01M15/11
摘要： A system, and corresponding method, for detecting the presence of a misfire condition by interpreting spectral activity of a running engine includes a device (309, 313) for measuring a characteristic, preferably an acceleration characteristic indicative of the running engine's performance, A spectral discrimination device (319), preferably a digital filter, receives a composite signal (317) provided by the measuring device (309, 313). The digital filter (319) provides a normal firing signal (321), corresponding to spectral energy attributable to a portion of the composite signal (317) representative of a normal firing condition in the running engine, and a misfire signal (323), corresponding to spectral energy attributable to another portion of the composite signal (317) representative of a misfiring condition in the running engine. A comparison device (325) provides and indication of a misfire condition (327) when a magnitude of the misfire signal (323) exceeds a magnitude of the normal firing signal (321).
摘要翻译： 用于通过解释运行发动机的频谱活动来检测失火状况的存在的系统和相应的方法包括用于测量特性的装置（309,313），优选地是表示运行的发动机性能的加速度特性。A光谱辨别 设备（319），优选数字滤波器，接收由测量设备（309,313）提供的复合信号（317）。 数字滤波器（319）提供正常点火信号（321），其对应于代表运行发动机中正常点火条件的复合信号（317）的一部分的光谱能量，以及失火信号（323），对应于 归因于代表运行发动机中的失火状态的复合信号（317）的另一部分的光谱能量。 当失火信号（323）的大小超过正常点火信号（321）的大小时，比较装置（325）提供和指示失火状态（327）。
-
公开(公告)号：US07089895B2
公开(公告)日：2006-08-15
申请号：US11035194
申请日：2005-01-13
IPC分类号： F01L9/04
CPC分类号： F01L9/04 , F01L2009/0436
摘要： An apparatus and method for operating a plurality of valves in an engine uses valve actuators to move each valve. Accelerometers are used to detect acceleration of the valves and particularly the moment when they seat. A knock sensor detects an acoustic impulse made by the valves when they seat. A controller correlates signals from the sensor and accelerometers, wherein a signal from the sensor that correlates in time with a signal from an accelerometer indicates seating of the respective valve, which indicates a closure of the respective valve. The controller measures a magnitude of the acoustic impulse to be used as feedback in controlling the operation of the respective valve actuator, and provide softer landings of the valve.
摘要翻译： 用于在发动机中操作多个阀的装置和方法使用阀致动器来移动每个阀。 加速度计用于检测阀门的加速度，特别是阀座的加速度。 爆震传感器检测阀座座时产生的声脉冲。 控制器将来自传感器和加速度计的信号相关联，其中来自传感器的信号在时间上与来自加速度计的信号相关联，表示相应阀的安置，其指示相应阀的关闭。 控制器测量在控制各个阀致动器的操作中用作反馈的声脉冲的大小，并且提供阀的较软的着陆。
-
5.发明授权Method for controlling the level of oxygen stored by a catalyst within a catalytic converter 失效控制催化转化器内催化剂储存的氧含量的方法
公开(公告)号：US5842340A
公开(公告)日：1998-12-01
申请号：US806179
申请日：1997-02-26
CPC分类号： F02D41/0295 , F01N11/007 , F02D41/1441 , F02D41/1475 , F01N2550/02 , F01N2900/0422 , F02D2200/0814 , Y02T10/47
摘要： The catalyst control method of the invention continuously estimates a level of oxygen stored by a catalyst within a catalytic converter. The estimated oxygen stored by the catalyst is compared to a predetermined threshold and positive or negative deviations in the oxygen amount from the threshold is determined. When a positive deviation from the threshold amount is detected, the air/fuel ratio flowing into an engine (16) is decreased. Correspondingly, when a negative deviation is detected, the air/fuel ratio flowing into the engine (16) is increased. The amount of oxygen stored by the catalyst is determined by analyzing signals from a first gas sensor (28) positioned upstream from a catalytic converter (34) and a second gas sensor (30) positioned downstream from the catalytic converter (34). An engine control unit (10) integrates an expression for the mass flow rate of excess oxygen into the catalytic converter (34). Engine control unit (10) applies a change in air/fuel ratio to maintain the oxygen level on the catalyst within the catalytic converter (34) at a desired level.
摘要翻译： 本发明的催化剂控制方法连续地估计催化转化器内催化剂储存的氧含量。 将由催化剂储存的估计氧气与预定阈值进行比较，并确定氧气量与阈值的正或负偏差。 当检测到与阈值量的正偏差时，流入发动机（16）的空气/燃料比减少。 相应地，当检测到负偏差时，流入发动机（16）的空气/燃料比增加。 通过分析来自位于催化转化器（34）上游的第一气体传感器（28）和位于催化转化器（34）下游的第二气体传感器（30）的信号来确定催化剂存储的氧气的量。 发动机控制单元（10）将过量氧气质量流量的表达式集成到催化转化器（34）中。 发动机控制单元（10）施加空燃比的变化，以将催化转化器（34）内的催化剂上的氧气水平维持在期望的水平。
-
公开(公告)号：US20060150932A1
公开(公告)日：2006-07-13
申请号：US11035194
申请日：2005-01-13
申请人： Jeffrey Naber , Robert Deutsch , David Frankowski , Monroe Goble , Steven Plee
发明人： Jeffrey Naber , Robert Deutsch , David Frankowski , Monroe Goble , Steven Plee
IPC分类号： F01L9/04
CPC分类号： F01L9/04 , F01L2009/0436
摘要： An apparatus and method for operating a plurality of valves in an engine uses valve actuators to move each valve. Accelerometers are used to detect acceleration of the valves and particularly the moment when they seat. A knock sensor detects an acoustic impulse made by the valves when they seat. A controller correlates signals from the sensor and accelerometers, wherein a signal from the sensor that correlates in time with a signal from an accelerometer indicates seating of the respective valve, which indicates a closure of the respective valve. The controller measures a magnitude of the acoustic impulse to be used as feedback in controlling the operation of the respective valve actuator, and provide softer landings of the valve.
摘要翻译： 用于在发动机中操作多个阀的装置和方法使用阀致动器来移动每个阀。 加速度计用于检测阀门的加速度，特别是阀座的加速度。 爆震传感器检测阀座座时产生的声脉冲。 控制器将来自传感器和加速度计的信号相关联，其中来自传感器的信号在时间上与来自加速度计的信号相关联，表示相应阀的安置，其指示相应阀的关闭。 控制器测量在控制各个阀致动器的操作中用作反馈的声脉冲的大小，并且提供阀的较软的着陆。
-
7.发明授权Method for monitoring the performance of a catalytic converter using a rate modifier 有权使用速率调节剂监测催化转化器的性能的方法
公开(公告)号：US6116021A
公开(公告)日：2000-09-12
申请号：US158460
申请日：1998-09-22
申请人： Darren Schumacher , Michael A. Badalament , Jeffrey D. Naber , Alan Chewter , Kevin J. Bush , Bruce Church , David Frankowski , David Price
发明人： Darren Schumacher , Michael A. Badalament , Jeffrey D. Naber , Alan Chewter , Kevin J. Bush , Bruce Church , David Frankowski , David Price
CPC分类号： F01N11/00 , F01N11/007 , F01N2550/02 , F01N2900/0422 , Y02T10/47
摘要： A method for monitoring the performance of a catalytic converter (34) computes the oxygen storage capacity and desorption capacity of a catalyst within the catalytic converter (34). An engine control unit (10) receives mass flow rate information of air from a mass air flow rate sensor (12) and an injector driver (24), and receives electrical signals from an upstream exhaust gas sensor (28) and a downstream exhaust gas sensor (30). A rate modifier is determined from excess air ratios and an adaptation parameter. The engine control unit (10) calculates normalized air fuel ratios for the exhaust gas entering and leaving the catalytic converter (34) and performs numerical integration using the rate modifier to determine the oxygen storage capacity of the catalyst in the catalytic converter (34). The calculated oxygen storage capacity of the catalyst can be compared with threshold values to determine the performance of the catalytic converter (34).
摘要翻译： 用于监测催化转化器（34）的性能的方法计算催化转化器（34）内的催化剂的储氧能力和解吸能力。 发动机控制单元（10）从质量空气流量传感器（12）和喷射器驱动器（24）接收空气的质量流量信息，并且从上游废气传感器（28）和下游排气 传感器（30）。 速率调节剂由过量空气比和适应参数确定。 发动机控制单元（10）计算进入和离开催化转化器（34）的废气的归一化空燃比，并使用速率调节器进行数值积分，以确定催化转化器（34）中催化剂的储氧能力。 将催化剂的计算氧气存储容量与阈值进行比较，以确定催化转化器（34）的性能。
-
公开(公告)号：US5842339A
公开(公告)日：1998-12-01
申请号：US806178
申请日：1997-02-26
申请人： Kevin J. Bush , Bruce A. Church , David Frankowski
发明人： Kevin J. Bush , Bruce A. Church , David Frankowski
CPC分类号： F01N11/00 , F01N11/007 , F01N2550/02 , F01N2900/0422 , Y02T10/47
摘要： A method for monitoring the performance of a catalytic converter (34) computes the oxygen storage capacity and desorption capacity of a catalyst within the catalytic converter (34). An engine control unit (10) receives mass flow rate information of air from a mass air flow rate sensor (12) and an injector driver (24), and receives electrical signals from an upstream exhaust gas sensor (28) and a downstream exhaust gas sensor (30). The engine control unit (10) calculates normalized air fuel ratios for the exhaust gas entering and leaving the catalytic converter (34) and performs numerical integration to determine the oxygen storage capacity and oxygen desorption capacity of the catalyst in the catalytic converter (34). The calculated oxygen storage and desorption capacities of the catalyst are compared with threshold values to determine the performance of the catalytic converter (34).
摘要翻译： 用于监测催化转化器（34）的性能的方法计算催化转化器（34）内的催化剂的储氧能力和解吸能力。 发动机控制单元（10）从质量空气流量传感器（12）和喷射器驱动器（24）接收空气的质量流量信息，并且从上游废气传感器（28）和下游排气 传感器（30）。 发动机控制单元（10）计算进入和离开催化转化器（34）的废气的归一化空燃比，并执行数值积分，以确定催化转化器（34）中的催化剂的储氧能力和氧解吸能力。 将催化剂的计算氧气存储和解吸能力与阈值进行比较以确定催化转化器（34）的性能。
-
-
-
-
-
-
-
搜索结果
8 条记录 (耗时 0.023 秒)
