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公开(公告)号：US4476709A
公开(公告)日：1984-10-16
申请号：US408896
申请日：1982-08-17
CPC分类号： G01L23/225
摘要： In a knock detecting apparatus for an internal combustion engine, the output signal of a knock sensor whose output signal level varies in accordance with the engine conditions, engine speed, sensor sensitivity, etc., is passed through an automatic gain control circuit (AGC) thereby stabilizing the output level. The background noise level derived by integrating the output signal and the stabilized output signal are compared to detect the occurrence of knocking. The stabilized output signal is passed through a low-pass filter or a band-pass filter and the resulting control signal is used to control the gain of the AGC circuit.
摘要翻译： 在内燃机的爆震检测装置中，输出信号电平根据发动机状态，发动机转速，传感器灵敏度等而变化的爆震传感器的输出信号通过自动增益控制电路（AGC） 从而稳定输出水平。 比较通过积分输出信号和稳定输出信号导出的背景噪声电平，以检测爆震的发生。 稳定的输出信号通过低通滤波器或带通滤波器，并且所得到的控制信号用于控制AGC电路的增益。
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公开(公告)号：US4440014A
公开(公告)日：1984-04-03
申请号：US368090
申请日：1982-04-13
申请人： Tadashi Hattori , Tadashi Ozaki , Yoshinori Ootsuka , Kazuhiko Miura , Masanori Hanaoka , Yukihide Hashiguchi
发明人： Tadashi Hattori , Tadashi Ozaki , Yoshinori Ootsuka , Kazuhiko Miura , Masanori Hanaoka , Yukihide Hashiguchi
CPC分类号： G01L9/007 , G01L23/223
摘要： An engine knocking detection device has a diaphragm to be disposed in contact with the engine cooling water so as to resonate with pulsations of the pressure of the cooling water caused by engine knockings, and output elements responsive to the vibration of the diaphragm to produce an electrical output signal to be utilized for the control of engine spark timing. The water-contacting surface of the diaphragm is coated with a layer of a hydrophilic material operative to prevent attachment or adhesion of air bubbles to the water-contacting surface of the diaphragm whereby the sensitivity of the diaphragm to the water pressure pulsation is improved.
摘要翻译： 发动机爆震检测装置具有隔膜以与发动机冷却水接触以便与由发动机撞击引起的冷却水的压力的波动共振，以及响应于隔膜的振动的输出元件，以产生电气 输出信号用于控制发动机点火正时。 隔膜的水接触表面涂覆有亲水材料层，其操作以防止气泡附着或粘附到隔膜的水接触表面，由此提高隔膜对水压脉动的灵敏度。
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公开(公告)号：US4616502A
公开(公告)日：1986-10-14
申请号：US533972
申请日：1983-09-20
IPC分类号： G01L23/22
CPC分类号： G01L23/223 , G01L23/225
摘要： In a knocking detection system for an internal combustion engine, a knocking is detected by a vibration sensor the output level of which is changed by controlling the sensor excitation current. The excitation current is controlled in dependence upon the output of the sensor, engine speed or load conditions or the like so that the output noise level of the sensor is maintained substantially constant regardless of engine operating conditions.
摘要翻译： 在用于内燃机的爆震检测系统中，通过控制传感器激励电流来改变输出电平的振动传感器来检测爆震。 励磁电流根据传感器的输出，发动机转速或负载条件等进行控制，使得传感器的输出噪声水平与发动机工作条件无关地保持基本恒定。
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公开(公告)号：US4567751A
公开(公告)日：1986-02-04
申请号：US539318
申请日：1983-10-05
CPC分类号： G01L23/225 , F02P5/152 , G01L23/222 , F02B1/04 , F02B3/06 , Y02T10/46
摘要： A device for detection of knocking in a diesel engine has a pressure sensor including a piezoelectric element and detecting a rate of change in combustion pressure, an angle sensor for detecting the rotation of the engine or engine speed, and a knocking detector for receiving outputs from the pressure and angle sensors. The knocking detector serves to detect a rate of change in combustion pressure per unit angle upon necessary correction by the engine speed and to compare the obtained rate with a reference rate of 5 atm/deg, at which knocking occurs. Knocking is detected when the detected rate exceeds the reference rate.
摘要翻译： 用于检测柴油发动机爆震的装置具有包括压电元件并检测燃烧压力变化率的压力传感器，用于检测发动机转速或发动机转速的角度传感器，以及用于接收来自 压力和角度传感器。 爆震检测器用于根据发动机转速检测必要校正时的每单位角燃烧压力的变化率，并将获得的速率与发生爆震的5atm / deg的参考速率进行比较。 当检测到的速率超过参考速率时，检测到敲击。
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公开(公告)号：US4567755A
公开(公告)日：1986-02-04
申请号：US584383
申请日：1984-02-28
摘要： A device for the detection of ignition misfire in an internal combustion engine is disclosed. A pressure detector detects changes in the combustion pressure of the engine, and a timing detector calculates a reference angular position of the engine. An ignition/misfire detection unit detects occurrences of ignition/misfire. The detection unit compares the output of the pressure detector with predetermined positive and negative reference voltages, and produces signals when these thresholds are passed. The period of a signal produced from the point of positive value detection to the negative value detection is counted and another period which is double the period from the generation of the positive value to the signal from the timing detector unit is counted. These two signals are then compared against one another, using a predetermined program, to detect if ignition or misfire has occurred in the internal combustion engine. A sample and hold circuit may also delay the value obtained by the pressure detector, if necessary.
摘要翻译： 公开了一种用于检测内燃机中的点火失火的装置。 压力检测器检测发动机的燃烧压力的变化，定时检测器计算发动机的基准角位置。 点火/失火检测单元检测点火/失火的发生。 检测单元将压力检测器的输出与预定的正和负参考电压进行比较，并且当这些阈值通过时产生信号。 对从正值检测点到负值检测产生的信号的周期进行计数，并计数从正值的产生到来自定时检测器单元的信号的周期的两倍的周期。 然后使用预定程序将这两个信号彼此进行比较，以检测内燃机中是否发生点火或失火。 如果需要，采样和保持电路也可以延迟由压力检测器获得的值。
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6.发明授权
公开(公告)号：US4537065A
公开(公告)日：1985-08-27
申请号：US575996
申请日：1984-02-01
CPC分类号： G01M15/08 , F02P5/1526 , G01L23/10 , G01L27/007 , F02B1/04 , Y02T10/142 , Y02T10/46
摘要： A device for detecting an abnormality in a pressure detector in an internal combustion engine. This device includes a piezoelectric pressure detector, a timing detection unit, a selective connection unit, and an abnormality detection unit. The abnormality detection unit includes a capacitor connected to an oscillation circuit, and the piezoelectric pressure detector is connected in parallel with the series connection of the oscillation circuit and the capacitor.
摘要翻译： 一种用于检测内燃机中的压力检测器的异常的装置。 该装置包括压电压力检测器，定时检测单元，选择连接单元和异常检测单元。 异常检测单元包括连接到振荡电路的电容器，并且压电压力检测器与振荡电路和电容器的串联连接并联。
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公开(公告)号：US4492109A
公开(公告)日：1985-01-08
申请号：US433878
申请日：1982-10-13
IPC分类号： G01L23/22
CPC分类号： G01L23/222
摘要： A knocking detection apparatus for multi-cylinder engines, capable of detecting knocking through sensing pressure pulsation propagating through the cooling water flowing in a cylinder block surrounding the cylinders. The knocking detection apparatus has a diaphragm facing the space downstream from the detection apparatus as viewed in the direction of flow of the cooling water, and a transducer dixed to the diaphragm.
摘要翻译： 一种用于多缸发动机的爆震检测装置，其能够检测通过在围绕气缸的气缸体中流动的冷却水传播的感测压力脉动的爆震。 爆震检测装置具有面向从冷却水的流动方向观察的从检测装置下游的空间的隔膜以及固定在隔膜上的换能器。
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公开(公告)号：US4574616A
公开(公告)日：1986-03-11
申请号：US595357
申请日：1984-03-30
CPC分类号： G01L23/222
摘要： A vibration detecting apparatus comprises a housing having at one end thereof an opening, a piezoelectric element disposed within the housing, a connector mounted to the housing to cover the opening thereof and having an output pin, a lead wire for electrically connecting the piezoelectric element with the output pin, and an initially conical annular spring having an outer peripheral edge portion thereof received by an annular groove formed in an inner peripheral wall of the housing. The piezoelectric element is biased by the initially conical annular spring.
摘要翻译： 一种振动检测装置，包括：壳体，其一端具有开口，设置在壳体内的压电元件，安装到壳体上以覆盖其开口并具有输出销的连接器，用于将压电元件与 输出销和最初锥形的环形弹簧，其外周边缘部分由形成在壳体的内周壁上的环形槽接收。 压电元件被初始锥形环形弹簧偏压。
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公开(公告)号：US4403505A
公开(公告)日：1983-09-13
申请号：US317405
申请日：1981-11-02
CPC分类号： F02P5/1455 , Y02T10/46
摘要： The pressure in the cylinder Pi(-.THETA.A) at the fixed angle -.THETA.A preceding to maximum ignition advance at the time of each combustion is determined from the output signal of a pressure detector for detecting the pressure in the cylinder of the internal combustion engine. The pressure in the cylinder Pi(+.THETA.B) at a predetermined angle +.THETA.B during the expansion process is also determined. It is decided whether the ratio Pi(+.THETA.B)/Pi(-.THETA.A) is larger or smaller than a predetermined value .beta. thereby to detect an ignition range always regardless of the running conditions of the internal combustion engine.
摘要翻译： 在每次燃烧时最大点火提前的固定角度 - THETA A处的气缸Pi（ - THETA A）中的压力由用于检测内燃机气缸中的压力的压力检测器的输出信号确定 发动机。 也确定在膨胀过程中在预定角度+ THETA B处的气缸Pi（+ THETA B）中的压力。 确定比率Pi（+ THETA B）/ Pi（ - THETA A）是否大于或小于预定值β，从而始终检测点火范围，而不管内燃机的运行状况如何。
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公开(公告)号：US4438647A
公开(公告)日：1984-03-27
申请号：US337247
申请日：1982-01-05
CPC分类号： G01M15/08
摘要： An ignition range detector for an internal combustion engine is disclosed, in which at each combustion of the internal combustion engine, a pressure signal of a pressure sensor for detecting the pressure in a cylinder is integrated by a signal associated with the crank angle to produce an area S.sub.1 +S.sub.2 presenting the combustion state. At the same time, the pressure signal for a hypothetical case of misfire under the same condition is integrated to produce an area S.sub.1. It is decided whether the ratio (S.sub.1 +S.sub.2)/S.sub.1 is higher than a predetermined value .alpha. or not thereby to detect an ignition range always stably regardless of the operating conditions of the internal combustion engine including the load thereon.
摘要翻译： 公开了一种用于内燃机的点火距离检测器，其中在内燃机的每次燃烧时，用于检测气缸中的压力的压力传感器的压力信号通过与曲柄角相关联的信号积分，以产生 呈现燃烧状态的区域S1 + S2。 同时，在相同条件下，假设失火情况下的压力信号被积分以产生区域S1。 确定比率（S1 + S2）/ S1是否高于预定值α，从而能够始终稳定地检测点火范围，而不管包括其上的负载的内燃机的操作条件如何。
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