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1. 发明专利

JPH0262940A INSTRUMENT FOR MEASURING DENSITY OF SMOKE 失效
公开(公告)号：JPH0262940A
公开(公告)日：1990-03-02
申请号：JP21465688
申请日：1988-08-29
申请人： NIPPON SOKEN , NIPPON DENSO CO , TOYOTA MOTOR CORP
发明人： MATSUSHIRO RYUICHI , KOSUDA TORU , YAMADA JUN , OZAKI MAKOTO , AOKI KEIJI , IKEDA SHINJI
IPC分类号： G01N21/59 , G01N21/53
摘要： PURPOSE:To calculate density by detecting the fluctuation width of an output signal corresponding to the amt. of the smoke in exhaust gaseous flow fluctuating according to the respective states of the suction, compression, explosion and exhaust of an engine. CONSTITUTION:A smoke sensor is installed in the exhaust gas flow passage of the engine and the sensor output when the smoke is generated from the engine is a ripple (AC) waveform. The four basic waveforms exist between the pulses of 1P/2 revolutions (one pulse is emitted by two revolutions of the engine) and respectively correspond to any of 4 cylinders in case of the 4 cylinders. The min. points of the respective waveforms indicate the max. value of the smoke density and the max. points indicate the min. value of the density (the value nearly zero density) and, therefore, the absolute value of the peak value of the smoke density is obtd. if the peak to peak value is obtd. The peak to peak value increases with an increase in the smoke density and the momentary differences between the value near zero density and the max. value are taken and, therefore, the temp. drift component of the zero point is automatically removed and the density detection with the good S/N is executed.

2. 发明专利

JPH04148053A SMOKE CONTROL DEVICE FOR DIESEL ENGINE 失效
公开(公告)号：JPH04148053A
公开(公告)日：1992-05-21
申请号：JP27242290
申请日：1990-10-12
申请人： NIPPON SOKEN , NIPPON DENSO CO , TOYOTA MOTOR CORP
发明人： YAMADA JUN , KOSUDA TORU , MATSUSHIRO RYUICHI , OZAKI MAKOTO , AOKI KEIJI , IKEDA SHINJI , KANEHARA KENJI
IPC分类号： G01N21/59 , F02B3/06 , F02B77/08 , F02M25/07 , G01M15/04
摘要： PURPOSE:To allow to use a smoke sensor at the temperature lower than a heatproof temperature by providing the smoke sensor at the downstream side of an EGR valve, and opening the EGR valve forcibly for a specific time when a smoke is detected. CONSTITUTION:A smoke sensor B as a smoke detecting means to detect the smoke density in the exhaust gas of a diesel engine A is provided at the downstream side of an EGR valve C which regulates the exhaust gas recirculation amount of the engine. And during the smoke detecting period, the EGR valve C is opened forcibly for a specific time to detect the smoke density, and the diesel engine A is controlled at the maximum injection amount within a smoke allowable value. Consequently, the smoke sensor of the low heatproof property which could not be installed to the exhaust pipe can be installed, and in the operation of no EGR operation, the sensor is opened to the atmosphere except the smoke detecting period, so as to allow to correct a zero point drift, and a highly accurate smoke detection can be carried out.

3. 发明专利

JPH03154852A SMOKE DENSITY MEASURING INSTRUMENT 失效
公开(公告)号：JPH03154852A
公开(公告)日：1991-07-02
申请号：JP29222589
申请日：1989-11-13
申请人： NIPPON SOKEN , NIPPON DENSO CO , TOYOTA MOTOR CORP
发明人： MATSUSHIRO RYUICHI , KOSUDA TORU , YAMADA JUN , OZAKI MAKOTO , AOKI KEIJI , IKEDA SHINJI
IPC分类号： G01N21/15 , G01N21/59
摘要： PURPOSE:To accurately measure smoke density by providing a pulse driving circuit for a light emitting element and outputting the output difference of a light receiving element driven with pulses as a smoke density signal through a differential circuit. CONSTITUTION:A driving circuit 602 receives the signal of a timing generating circuit 601 to supplies a pulse signal S1 with a voltage VD to an LED 4 according to a signal T1, the V0 is varied with the output S0 of an integration circuit 606, and a phototransistor 5 generates an output S2. A circuit 603 holds the output S2 for a time T2 and the circuit 604 holds the output S2 of the PT 5 for a time T3. A differential amplifier 605 generates a differential output S5 with the outputs of the circuits 603 and 604. The influence of disturbing light is canceled by the circuits 603 and 604. An integration circuit 606 generates the mean output S6 of the output S5 and the output is fed back to the driving circuit 602 to control the VD. A differential amplifier 607 generates a differential output S7 based upon the S5 and S6 and a variation quantity detecting circuit 608 generates the peak-to-peak value of the AC component of the output S7 as the smoke density signal S. Consequently, the influence of the disturbing light is eliminated, drift and gain variation at three points is small, and a measurement error is small.

4. 发明专利

JPH0427846A MEASURING APPARATUS FOR CONCENTRATION OF FINE PARTICLE 失效
公开(公告)号：JPH0427846A
公开(公告)日：1992-01-30
申请号：JP13251990
申请日：1990-05-24
申请人： NIPPON DENSO CO , TOYOTA MOTOR CORP , NIPPON SOKEN
发明人： YAMADA JUN , KOSUDA TORU , MATSUSHIRO RYUICHI , OZAKI MAKOTO , AOKI KEIJI , IKEDA SHINJI , KANEHARA KENJI
IPC分类号： G01N21/59
摘要： PURPOSE:To reduce the error of the output of a sensor, to accurately measure smoke, to continuously measure the concn. of the smoke at a transitional period as a Bosch smoke value and to measure the concn. of the smoke at the time of running by holding the temps. of a light emitting element and a photodetector to constant temp. by a thermostatic tank. CONSTITUTION:A small-size thermostatic tank 601 holds a light emitting element 4 and a photodetector 5 to constant temp. and the temps. of both of them are detected by a thermistor element to be held to constant tem. by feedback control. The error of the output of a sensor is + or -0.2% and a smoke measuring error can be suppressed to + or -2% or less in 2 S.B. and smoke can be accurately measured.

5. 发明专利

JPH03134256A EGR CONTROLLER DIESEL ENGINE 失效
公开(公告)号：JPH03134256A
公开(公告)日：1991-06-07
申请号：JP26812189
申请日：1989-10-17
申请人： NIPPON SOKEN , NIPPON DENSO CO , TOYOTA MOTOR CORP
发明人： MATSUSHIRO RYUICHI , KOSUDA TORU , YAMADA JUN , OZAKI MAKOTO , AOKI KEIJI , IKEDA SHINJI
IPC分类号： F02M25/07 , F02B3/06
摘要： PURPOSE:To enable EGR control of a diesel engine even at the transient time by controlling EGR quantity of the engine according to normal EGR quantity in response to rotation speed and load, and transient EGR quantity in response to the load and a variation rate. CONSTITUTION:At the normal time of an engine, a normal EGR quantity is calculated by a normal EGR quantity calculation means in response to an engine speed N and load theta, and the normal EGR learning quantity is renewed so that the output of a smoke sensor comes near to a specified value by a normal EGR learning quantity renew means. At the transient time, the transient EGR quantity is calculated by the transient EGR quantity calculation means in response to load theta and the variation rate dtheta/dt. The transient EGR learning quantity is renewed so that the output of the smoke sensor comes near to the specified value by the transient EGR learning quantity renew means. In an EGR quantity control means, the EGR quantity of the engine is controlled in response to the normal EGR learning quantity, the transient EGR quantity, and the transient EGR learning quantity.

6. 发明专利

JPS59126075A Ignition timing detecting device for diesel engine 失效
标题翻译：点火时间检测柴油发动机装置
公开(公告)号：JPS59126075A
公开(公告)日：1984-07-20
申请号：JP22983
申请日：1983-01-06
申请人： Nippon Denso Co Ltd , Nippon Soken Inc
发明人： OOTSUKA YOSHINORI , HATSUTORI TADASHI , YAMAMOTO MINORU , OZAKI MAKOTO
IPC分类号： F02P17/04 , F02P17/00
摘要： PURPOSE: To detect a combustion condition more exactly by a method wherein an ignition timing is determined based on the result of comparation of a measuring signal obtained from the output signal or the like of a pressure detector with an output data read out of a memory in accordance with said signal.
CONSTITUTION: A timing detector 2, operating the measuring timing under synchronizing with the rotation of a crank shaft and equipped with an angle detector 22 as well as a reference position detector 23, and the pressure detector 1, utilizing a piezo element, are provided to input the output signals of both detectors into an ignition timing decision circuit 3. In the decision circuit 3, the output of the pressure detector 1 is converted into a pressure waveform by a charge amplifier 31 at first, then, the output thereof is processed in an A/D converter 32 by the timing of the output of said angle detector 22. Subsequently, the output of the A/D converter is compared in a comparator 33 with the output of an ROM34, memorizing an output corresponding to a compressive pressure in respective crank angles upon non-igniting of the engine, and the ignition timing is determined in accordance with the result of the comparation.
COPYRIGHT: (C)1984,JPO&Japio
摘要翻译：目的：通过基于从压力检测器的输出信号等获得的测量信号的比较结果确定点火正时的方法来更精确地检测燃烧条件，其中从存储器读出的输出数据根据所述信号。构成：将定时检测器2与曲柄轴的旋转同步并配备有角度检测器22以及基准位置检测器23以及使用压电元件的压力检测器1进行操作，将两个检测器的输出信号输入到点火正时判定电路3中。在判定电路3中，首先通过电荷放大器31将压力检测器1的输出转换为压力波形，然后将其输出进行处理通过所述角度检测器22的输出定时，A / D转换器32进行比较。随后，将比较器33的A / D转换器的输出与存储对应于压缩压力的输出的ROM34进行比较根据比较的结果确定在发动机不点火时的相应曲柄角和点火正时。

7. 发明专利

JPS5958770A Pressure detector mounting type ignition plug 失效
标题翻译：压力检测器安装型点火插头
公开(公告)号：JPS5958770A
公开(公告)日：1984-04-04
申请号：JP16826882
申请日：1982-09-29
申请人： Nippon Soken , Nippon Denso Co
发明人： OOTSUKA YOSHINORI , HATSUTORI TADASHI , YAMAGUCHI KIMIAKI , OZAKI MAKOTO
IPC分类号： H01T13/40

8. 发明专利

JPS59187237A Detector of knocking for internal-combustion engine 失效
标题翻译：内燃机起动侦测器
公开(公告)号：JPS59187237A
公开(公告)日：1984-10-24
申请号：JP5827983
申请日：1983-04-01
申请人： Nippon Denso Co Ltd , Nippon Soken Inc
发明人： MIURA KAZUHIKO , HATSUTORI TADASHI , OZAKI MAKOTO , YAMAGUCHI KIMIAKI
IPC分类号： G01H11/08 , G01L23/22
CPC分类号： G01L23/222
摘要： PURPOSE: To simplify the manufacture of the titled detector, to facilitate the assembly thereof and to increase its reliability for long employment, by providing a cut in a part of a ring-shaped belleville spring which applies a load on a piezoelectric element, and by making the outer periphery of the spring engage with a staged portion formed on the inner periphery of housing.
CONSTITUTION: A belleville spring 30 having a cut 30a made in a part is provided for applying a load on a piezoelectric element 100, and the outer periphery thereof is made to engage with a cut staged part 400a of a housing member 4. On the piezoelectric element 100a preset load is applied uniformly through the intermediary of a weight 101 and the belleville spring 30. Therefore, it is unnecessary to make a hole in the piezoelectric element 100, and thus the manufacture is simplified. In addition, the provision of the cut 30a in the belleville spring 30 facilitates the assembly, and the belleville spring 30 is prevented from slipping out. Thus, the reliability for long employment can be increased.
COPYRIGHT: (C)1984,JPO&Japio
摘要翻译：目的：为了简化标称检测器的制造，为了便于其组装，并且通过在对压电元件施加负载的环形贝叶弹簧的一部分上提供切割，并且通过在压电元件上施加负载，并且通过使得弹簧的外周与形成在壳体的内周上的分段部分接合。构成：具有一部分制成的切口30a的贝氏弹簧30被设置用于在压电元件100上施加载荷，并且其外周与壳体构件4的切割分段部分400a接合。在压电元件100a预设载荷通过重物101和贝氏弹簧30的中间均匀地施加。因此，不需要在压电元件100中形成孔，因此制造简化。此外，在百叶窗弹簧30中设置切口30a有助于组装，并且防止百叶窗弹簧30滑出。因此，长期就业的可靠性可以提高。

9. 发明专利

JPS59176646A Ignition and extinction detector for internal combustion engine 失效
标题翻译：内燃机点火和放电检测器
公开(公告)号：JPS59176646A
公开(公告)日：1984-10-06
申请号：JP4968983
申请日：1983-03-26
申请人： Nippon Denso Co Ltd , Nippon Soken Inc
发明人： OOTSUKA YOSHINORI , HATSUTORI TADASHI , YAMAMOTO MINORU , OZAKI MAKOTO
IPC分类号： G01L23/08 , F02D45/00 , F02M65/00 , F02P17/00 , F02P17/12 , G01M15/04
CPC分类号： F02P17/00
摘要： PURPOSE:To decide on ignition when a positive-directional output is large or extinction when small and to detect an ignition limit by comparing the output of a positive-directional peak holding circuit with that of a negative-directional peak holding circuit through a comparator. CONSTITUTION:The output of the positive-directional peak holding circuit 32 is compared with the output of a negative-directional peak holding circuit 33 by the comparator 34. When the positive-directional output is larger than the negative-directional output, the output of the comparator 34 rises in level to decide on ignition, and when the positive-directional output is smaller than the negative- directional output, the output of the comparator 34 falls in level to decide on extinction. The output timing of the comparing circuit 34 is so determined by the output of a timing arithmetic circuit 24 by opening a gate. Consequently, the ignition limit is detected practically and accurately.
摘要翻译：目的：当正向输出较大或在小时消失时决定点火，并通过比较正方向峰值保持电路的输出与负方向峰值保持电路的输出进行比较来检测点火极限。构成：将正方向峰值保持电路32的输出与比较器34的负方向峰值保持电路33的输出进行比较。当正向输出大于负向输出时，输出比较器34上升电平以决定点火，并且当正向输出小于负向输出时，比较器34的输出下降到水平以决定消光。比较电路34的输出定时由定时运算电路24的输出通过打开门来确定。因此，实际上和准确地检测点火极限。

10. 发明专利

JPS5970936A Knocking detecting apparatus for diesel engine 失效
标题翻译：柴油发动机卡锁检测装置
公开(公告)号：JPS5970936A
公开(公告)日：1984-04-21
申请号：JP18057282
申请日：1982-10-16
申请人： Nippon Denso Co Ltd , Nippon Soken Inc
发明人： OOTSUKA YOSHINORI , HATSUTORI TADASHI , YAMAMOTO MINORU , OZAKI MAKOTO
IPC分类号： F02B1/04 , F02B3/06 , F02D45/00 , F02P5/152 , F02P17/12 , G01L23/22 , G01M15/00
CPC分类号： G01L23/222 , F02B1/04 , F02B3/06 , F02P5/152 , G01L23/225 , Y02T10/46
摘要： PURPOSE:To contrive to enhance detection accuracy, by a method wherein pressure change per angle is detected and it is detected that the quotient obtained by dividing the differentiate value of a max. pressure value by the differentiate value directly before ignition reaches a definite value. CONSTITUTION:The change rate of combustion pressure is detected by a pressure detector 1 and engine rotation is detected by an angle detector 2. Measuring timing is calculated in a timing operation circuit 24 by the output of the angle detector 2 and the output value of the pressure detector 1 is taken in a sample hold circuit 33. The max. output value of the pressure detection value is taken in a peak hold circuit 32 and divided by the output of the sample hold circuit in a division circuit 34. This division value and the output value of a reference voltage generating circuit 35 are compared by a comparison circuit 36. By this method, knocking detection can be accurately performed.
摘要翻译：目的：为了提高检测精度，通过检测每个角度的压力变化的方法，并且检测到通过除以最大值的差分值获得的商。直接点火前的差分值的压力值达到一定值。构成：通过压力检测器1检测燃烧压力的变化率，通过角度检测器2检测发动机转速。通过角度检测器2的输出和定时运算电路24的输出值，在定时运算电路24中计算出测量定时压力检测器1被带入采样保持电路33中。在峰值保持电路32中取出压力检测值的输出值，并将其除以分割电路34中的采样保持电路的输出。通过比较将该分频值和基准电压发生电路35的输出值进行比较通过这种方法，可以准确地进行爆震检测。

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