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公开(公告)号：US4490799A
公开(公告)日：1984-12-25
申请号：US327733
申请日：1981-12-04
CPC分类号： F02P17/08
摘要： An ignition analyzer apparatus tests the condition of the ignition coil of an internal combustion engine. A gating pulse is supplied to a test circuit immediately before the points are to open for a selected cylinder which causes the test circuit to provide a low resistance in parallel with the points when the points open. This allows a reduced primary current to flow through the ignition coil and prevents the production of a voltage pulse large enough to fire the spark plug for the selected cylinder. While the points are open and the test circuit is providing a low resistance path, the primary current flowing through the coil is measured. The gating pulse ends approximately half-way between the "points open" time of the selected cylinder and the "points open" time of the next cylinder so that the rotor of the distributor is between distributor terminals. When the gating pulse ends, the test circuit changes to a nonconductive state, and since the points have not yet closed, the primary current is interrupted and a high voltage secondary test signal is induced in the secondary of the ignition coil. This test signal cannot, however, fire a spark plug since the rotor is in between distributor terminals, and since the reduced amplitude of the primary current prevents arc-over from the rotor to the distributor terminals. The measured primary current and the measured high voltage secondary test signal are used to provide an indication of ignition coil condition.
摘要翻译： 点火分析装置测试内燃机的点火线圈的状态。 在所选择的气缸的点打开之前，门控脉冲被提供给测试电路，这使得测试电路在点打开时与点并联提供低电阻。 这允许减小的初级电流流过点火线圈并且防止产生足够大的电压脉冲以对所选择的气缸的火花塞起火。 当点打开并且测试电路提供低电阻路径时，测量流过线圈的初级电流。 选通脉冲在所选择的气缸的“打开”时间和下一个气缸的“打开”时间之间大致中途地结束，使得分配器的转子位于分配器端子之间。 当门控脉冲结束时，测试电路变为非导通状态，并且由于点尚未闭合，所以初级电流被中断，并且在点火线圈的次级中感应出高电压次级测试信号。 然而，由于转子位于分配器端子之间，因此该测试信号不能点燃火花塞，并且由于初级电流的减小的幅度防止了从转子到分配器端子的转弧。 测量的初级电流和测量的高压次级测试信号用于提供点火线圈状态的指示。
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公开(公告)号：US5004979A
公开(公告)日：1991-04-02
申请号：US496103
申请日：1990-03-16
IPC分类号： G01P3/481
CPC分类号： G01P3/481
摘要： A signal representing the RPM of an internal combustion engine is produced by a signal processor connected to the battery of the vehicle. The signal processor derives an electrical signal from the battery which contains signal components produced by operation of the vehicle ignition system, as well as components from a multitude of other sources such as the voltage regulator, fans, air conditioning and other electrical systems of the vehicle. The signal processor filters and signal processes the signal derived from the vehicle battery to produce a signal having a frequency which is related to the RPM of the engine.
摘要翻译： 表示内燃机的RPM的信号由连接到车辆的电池的信号处理器产生。 信号处理器从电池得到包含由车辆点火系统的操作产生的信号分量的电信号，以及来自诸如电压调节器，风扇，空调和车辆的其它电气系统的众多其他来源的组件 。 信号处理器对来自车辆电池的信号进行滤波和信号处理，以产生具有与发动机的RPM相关的频率的信号。
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公开(公告)号：US06396278B1
公开(公告)日：2002-05-28
申请号：US09516598
申请日：1998-09-10
申请人： Surender K. Makhija
发明人： Surender K. Makhija
IPC分类号： F02P1700
CPC分类号： H01T13/60 , F02P2017/006 , G01R1/06788 , G01R15/16
摘要： A hand-held ignition voltage tester for detecting voltage on a spark plug wire in an ignition system, such as a distributorless ignition system. The tester includes a housing, positive and negative power cables and a capacitive probe for capacitively coupling to the spark plug wire. The capacitive probe generates a voltage signal which is representative of the voltage on the spark plug wire. A plurality of voltage level indicators are mounted to the housing to form a bar graph, with each indicator corresponding to a selected voltage level. A measurement circuit is coupled to the power cables and the capacitive probe for activating the voltage level indicators in response to the voltage signal.
摘要翻译： 一种手持式点火电压测试仪，用于检测点火系统中的火花塞线上的电压，例如无分配器点火系统。 测试仪包括外壳，正极和负极电力电缆以及用于电容耦合到火花塞线的电容式探头。 电容式探头产生代表火花塞线上电压的电压信号。 多个电压电平指示器被安装到壳体以形成条形图，每个指示器对应于所选择的电压电平。 测量电路耦合到电力电缆和电容式探针，用于响应于电压信号激活电压电平指示器。
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公开(公告)号：US5629680A
公开(公告)日：1997-05-13
申请号：US596411
申请日：1996-02-02
申请人： Surender K. Makhija
发明人： Surender K. Makhija
IPC分类号： G01R31/00 , G01R31/3193 , H02H3/087 , G08B21/00
CPC分类号： G01R31/006 , G01R31/3193 , H02H3/087
摘要： A vehicle current drain tester tests nominal current drain through a vehicle electrical system while preserving on-board vehicle memory. The tester includes a measurement current loop, an offset circuit and a fail indicator. The current loop includes first and second tester terminals for connection to the electrical circuit, first and second voltage source terminals for connection to a voltage source and a current sensor. The current sensor generates a measurement signal in response to current flowing in the current loop. The offset circuit is coupled to the current sensor and applies an offset to the measurement signal which represents a selected drain current level in the vehicle. The offset circuit generates a fail output signal as a function of whether the measurement signal exceeds the offset. The fail indicator is coupled to the offset circuit and is responsive to the fail output signal.
摘要翻译： 车辆电流消耗测试仪通过车辆电气系统测试额定电流消耗，同时保留车载存储器。 测试仪包括测量电流回路，偏移电路和故障指示器。 电流回路包括用于连接到电路的第一和第二测试器端子，用于连接到电压源和电流传感器的第一和第二电压源端子。 电流传感器响应于在电流回路中流动的电流产生测量信号。 偏移电路耦合到电流传感器，并向表示车辆中所选择的漏极电流电平的测量信号施加偏移。 偏移电路根据测量信号是否超过偏移量产生故障输出信号。 故障指示符耦合到偏移电路并响应于失败输出信号。
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公开(公告)号：US5160892A
公开(公告)日：1992-11-03
申请号：US593154
申请日：1990-10-05
IPC分类号： F02P17/08
CPC分类号： F02P17/08
摘要： An engine analyzer for an internal combustion engine includes an analog-to-digital (A/D) converter which digitizes an analog input waveform representing, for example, a secondary or primary voltage waveform of the ignition coil of the internal combustion engine. The sampling rate of the analog digital converter is determined by dividing the waveform time period by the desired number of samples. An adjustment factor C is used to provide a buffer period during the sampling period of the waveform. A display for displaying the waveform has a buffer region which corresponds to the buffer period. Thus, a variation in the speed of the engine which causes the engine to slow down and extends the period of the engine waveform does not cause a loss of data collected from the waveform because the buffer period provides a margin of error.
摘要翻译： 用于内燃机的发动机分析器包括将表示例如内燃机的点火线圈的二次或一次电压波形的模拟输入波形数字化的模数（A / D）转换器。 模拟数字转换器的采样率通过将波形时间段除以所需数量的样本来确定。 调整因子C用于在波形的采样周期期间提供缓冲期。 用于显示波形的显示器具有对应于缓冲器周期的缓冲区域。 因此，由于缓冲期间提供了误差，因此发动机的速度变化引起发动机减速并延长发动机波形的周期不会导致从波形收集的数据的损失。
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公开(公告)号：US06629054B2
公开(公告)日：2003-09-30
申请号：US09985295
申请日：2001-11-02
IPC分类号： G01L326
CPC分类号： G01M17/007
摘要： A system comprised of a computer that contains a display device such as monitor, an input device (e.g. a keyboard or a touch screen), a storage device such as a hard-drive, and software capable of collecting data. The data is collected from an adapter of which one end is attached to the computer and the other one end and attached to an automotive part. The automotive part is tested and performance data extracted. The data is sent to a remote location or to the computer where it is compiled for a wire variety of uses.
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公开(公告)号：US07078879B2
公开(公告)日：2006-07-18
申请号：US10105420
申请日：2002-03-26
申请人： Surender K. Makhija
发明人： Surender K. Makhija
CPC分类号： H02J7/0047 , G01R31/3665
摘要： A battery tester and charger is provided for safely and efficiently testing and charging partially charged and discharged batteries. Information about the battery to be tested is inputed by the user. A first heavy loaded is applied and the bounce back voltage is used to determine the state of charge of the battery. If the battery is chargeable then a set charge time is determined. If not, then the battery can be discarded.
摘要翻译： 提供电池测试器和充电器，用于安全有效地测试和充电部分充电和放电的电池。 有关待测电池的信息由用户输入。 应用第一个重载，并使用反弹电压来确定电池的充电状态。 如果电池充电，则确定设定的充电时间。 如果没有，则可以丢弃电池。
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公开(公告)号：US5834939A
公开(公告)日：1998-11-10
申请号：US729754
申请日：1996-10-07
申请人： Surender K. Makhija
发明人： Surender K. Makhija
CPC分类号： H01T13/60 , G01R15/16 , F02P2017/006 , G01R1/06788
摘要： A hand-held ignition voltage tester for detecting voltage on a spark plug wire in an ignition system, such as a distributorless ignition system. The tester includes a housing, positive and negative power cables and a capacitive probe for capacitively coupling to the spark plug wire. The capacitive probe generates a voltage signal which is representative of the voltage on the spark plug wire. A plurality of voltage level indicators are mounted to the housing to form a bar graph, with each indicator corresponding to a selected voltage level. A measurement circuit is coupled to the power cables and the capacitive probe for activating the voltage level indicators in response to the voltage signal.
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