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11. 发明专利

DE69729270D1 未知
公开(公告)号：DE69729270D1
公开(公告)日：2004-07-01
申请号：DE69729270
申请日：1997-12-23
申请人： DENSO CORP
发明人： OKAZAKI KAZUHIRO , HASEDA SATOSHI , JONO HIROSHI , TAKAMI MASAYUKI , MIZOGUCHI TOMOMICHI
IPC分类号： G01N27/41 , F02D41/14 , G01N27/26 , G01N27/407 , G01N27/406

12. 发明专利

GB2318186B Oxygen concentration detection 未知
公开(公告)号：GB2318186B
公开(公告)日：2000-06-07
申请号：GB9721084
申请日：1997-10-03
申请人： DENSO CORP
发明人： TAKAMI MASAYUKI , MIZOGUCHI TOMOMICHI , HASEDA SATOSHI , OKAZAKI KAZUHIRO
IPC分类号： G01N27/41 , G01N27/406 , G01N27/416 , G01N27/417
摘要： An A/F sensor is driven by a voltage applied thereto at a command issued by a microprocessor, outputting an A/F detection signal which is linearly proportional to the concentration of oxygen. The microprocessor controls the voltage applied to the A/F sensor to bring a current flowing through the A/F sensor to a predetermined value in a zone outside a predetermined air-fuel ratio detection zone. In this outside zone, the applied voltage is controlled in accordance with a characteristic different from a positive characteristic in a normal positive characteristic in a voltage-current relation. That is, in a rich zone outside the air-fuel ratio detection zone, the applied voltage is controlled so as to make the applied voltage approach a maximum value of the electromotive force of the A/F sensor. In a lean zone outside the air-fuel ratio detection zone, on the other hand, the applied voltage is controlled so as to make the applied voltage approach a minimum value of the electromotive force of the A/F sensor.

13. 发明专利

DE102007015497B4 Spracherkennungsvorrichtung und Spracherkennungsprogramm 未知
公开(公告)号：DE102007015497B4
公开(公告)日：2014-01-23
申请号：DE102007015497
申请日：2007-03-30
申请人： DENSO CORP
发明人： HITOTSUMATSU TAKAFUMI , TAKAMI MASAYUKI
IPC分类号： G10L15/22 , G10L15/00
摘要： Spracherkennungsvorrichtung, die aufweist: ein Speichermedium (1, 77) zum Speichern von in einem Baum strukturierten Wörterbuchdaten (100, 100'), die mehrere Wörter als Knoten in einer Baumstruktur enthalten, eine Rückwärts-Sprache-Vergleichseinheit (75) zum Vergleichen einer Rückwärts-Sprache, die aus einer Reproduktion einer eingegebenen Sprache in chronologischer Rückwärtsreihenfolge resultiert, mit einem akustischen Rückwärts-Modell, das einer Sprache einer Reproduktion einer Wortkettenfolge in chronologischer Rückwärtsreihenfolge in Richtung einer Wurzel der Baumstruktur entspricht, wobei ein Vergleich in umgekehrter Reihenfolge der Folge durchgeführt wird, eine Vorwärts-Sprache-Vergleichseinheit (75) zum Vergleichen der eingegebenen Sprache mit einem akustischen Vorwärts-Modell, das einer Sprache entspricht, die aus einer chronologischen Reproduktion einer Zwischenwortkette resultiert, die eine Folge einer Wortkette ist, die von einem Blattknotenwort in Richtung einer Wurzel beginnt und mit einem anderen Knoten als die Wurzel der Baumstruktur endet, wobei ein Vergleich in der Reihenfolge der Folge durchgeführt wird, und eine Ausgabeeinheit (78) zum Ausgeben einer Wortkette, die sehr wahrscheinlich mit der eingegebenen Sprache übereinstimmt, auf der Grundlage eines Vergleichsergebnisses von der Rückwärts-Sprache-Vergleichseinheit und der Vorwärts-Sprache-Vergleichseinheit; wobei das Speichermedium (1, 77) Blattspezifikationsdaten zum Spezifizieren der Zwischenwortkette in den in einem Baum strukturierten Wörterbuchdaten (100, 100') speichert, und wobei die Vorwärts-Sprache-Vergleichseinheit (75) die eingegebene Sprache mit einem akustischen Vorwärts-Modell vergleicht, das einer Sprache entspricht, die aus einer chronologischen Reproduktion der Zwischenwortkette in der Reihenfolge der Folge der Zwischenwortkette resultiert, die durch die Blattspezifikationsdaten spezifiziert ist.

14. 发明专利

DE19652059B4 未知
公开(公告)号：DE19652059B4
公开(公告)日：2009-12-24
申请号：DE19652059
申请日：1996-12-13
申请人： DENSO CORP
发明人： TAKAMI MASAYUKI , HASEDA SATOSHI , MIZOGUCHI TOMOMICHI
IPC分类号： G01N27/41 , G01N27/419 , F02D41/14 , G01N27/406 , G01N27/409
摘要： To achieve change-over from detection of an internal resistance of an oxygen sensor S to detection of a threshold current effectively in a short time, a positive desired voltage for measuring a threshold current is applied to an oxygen sensor S to detect the threshold current and then a negative voltage for measuring a temperature is applied to the oxygen sensor S for a short time to detect an internal resistance of the oxygen sensor. After that, when the voltage applied to the oxygen sensor S is restored to a positive desired voltage for measuring the threshold current, by applying a voltage higher than this positive desired voltage temporarily to the oxygen sensor S, discharge or recharge of electric charges due to electrostatic capacitance components of the oxygen sensor S is completed quickly to reduce the time required for convergence to the threshold current when the voltage is changed. As a result, it is possible to reduce the time during which the threshold current cannot be detected.

15. 发明专利

DE102007015495A1 Control object e.g. driver`s finger, detection device for e.g. vehicle navigation system, has illumination section to illuminate one surface of object, and controller to control illumination of illumination and image recording sections 未知
公开(公告)号：DE102007015495A1
公开(公告)日：2007-10-04
申请号：DE102007015495
申请日：2007-03-30
申请人： DENSO CORP
发明人： NIWA SHINJI , AICHI ISAO , TAKAMI MASAYUKI
IPC分类号： G06K9/62
摘要： The device has an image recording section (12) for recording a control object e.g. driver`s finger. The object has a surface, on which external light falling outside of a control device (1) falls, and another surface opposite to the former surface. The recording section accommodates the latter surface. An illumination section (14) e.g. infrared light emitting diode, illuminates the latter surface of the object, and a memory (18) e.g. RAM, stores images that are recorded by the recording section. A controller (16) controls the illumination of the illumination and image recording sections. An independent claim is also included for a method for extracting a control object for operation of a control device.

16. 发明专利

GB2335495A Detecting element resistance of a gas concentration sensor 未知
公开(公告)号：GB2335495A
公开(公告)日：1999-09-22
申请号：GB9906459
申请日：1999-03-19
申请人： DENSO CORP
发明人： MIZOGUCHI TOMOMICHI , TAKAMI MASAYUKI
IPC分类号： G01N27/41 , G01N27/407 , G01N27/409 , G01N27/417
摘要： An A/F ratio sensor includes a solid electrolyte sensing element and generates a sensor current IP in proportion to the oxygen concentration when a voltage AFC is applied thereto, outside period t, - t4. The value of this voltage and current are stored at intervals. At t1, the start of the element resistance measurement, a changing voltage with a given time constant (which is generated by applying a step voltage change to a low pass filter (figure 4)), is applied to the sensor, until the changing voltage reaches a preset reference value Vref at time t2. The corresponding value of the sensor current IP is saved over a short time interval t2 -t3, and the voltage AFC is allowed to return to its previous value. The resistance of the sensor element is determined from the change in applied voltage #V and the resulting change in sensor current #l.

17. 发明专利

DE19826686A1 Assembly for detection of air-fuel ratio in exhaust by oxygen detector 未知
公开(公告)号：DE19826686A1
公开(公告)日：1998-12-24
申请号：DE19826686
申请日：1998-06-16
申请人： DENSO CORP
发明人： MIZOGUCHI TOMOMICHI , TAKAMI MASAYUKI , NAKANO SYUICHI
IPC分类号： G01N27/41 , G01N27/419 , G01N27/417 , F02D41/14
摘要： Air:fuel ratio in an engine exhaust pipe is determined by detecting the concentration of oxygen in the gases. The oxygen detector (11) comprises a first electrolyte layer (14) with a diffusion-resistance layer (13) in contact with the first layer (14), and electrodes (15a, 15b, 15c) formed on both sides of the first fixed layer. The first fixed electrolyte layer generates an electrical boundary threshold which matches the oxygen concentration in the exhaust gases, when a voltage is applied. The oxygen inlet/outlet unit (12) has a second fixed electrolyte layer (16) and a pair of electrodes (15c, 15d, 15e) which are formed on both sides of the electrolyte layer. The oxygen inlet/outlet unit (12) supplies oxygen to the reference gas side of an air/fuel ratio unit, or oxygen to the exhaust gas side of the electrode. A control unit (30) responds to the threshold current (lp) as detected by a current detector (20) to regulate the amount of oxygen in or out of the oxygen inlet/outlet unit (12). One electrical target value in the fixed electrolyte layer is so varied that the quantities of oxygen moving in the fixed electrolyte layer are equal, controlling the oxygen supply in the oxygen inlet/outlet unit (12).

18. 发明专利

GB2318186A Operating a limit-current air/fuel ratio sensor 未知
公开(公告)号：GB2318186A
公开(公告)日：1998-04-15
申请号：GB9721084
申请日：1997-10-03
申请人： DENSO CORP
发明人： TAKAMI MASAYUKI , MIZOGUCHI TOMOMICHI , HASEDA SATOSHI , OKAZAKI KAZUHIRO
IPC分类号： G01N27/41 , G01N27/406 , G01N27/416 , G01N27/417
摘要： An A/F sensor (30) is driven by a voltage applied thereto at a command issued by a microprocessor (20), and outputs an A/F detection signal which is linearly proportional to the concentration of oxygen. The applied voltage is determined by different rules inside and outside a predetermined air-fuel ratio detection zone (A/F 12 - 18). In the predetermined detection zone, the applied voltage normally has a positive characteristic inclined at Ri to the I axis. Outside the predetermined detection zone, the applied voltage is controlled either to limit the current signal to a predetermined value, preferably by using feedback or according to a different current-voltage characteristic from that inside the zone. Preferably, in a rich zone outside the air-fuel ratio detection zone, the applied voltage is controlled so as to make the applied voltage approach a maximum value (0.9V) of the electromotive force of the A/F sensor and in a lean zone outside the air-fuel ratio detection zone, the applied voltage is controlled so as to make the applied voltage approach a minimum value (0V) of the electromotive force of the A/F sensor.

19. 发明专利

DE19708011A1 未知
公开(公告)号：DE19708011A1
公开(公告)日：1997-09-11
申请号：DE19708011
申请日：1997-02-27
申请人： DENSO CORP
发明人： TAKAMI MASAYUKI , MIZOGUCHI TOMOMICHI , HASEDA SATOSHI , OKAZAKI KAZUHIRO , JONO KOJI
IPC分类号： G01N27/41 , F02D41/14 , G01N27/406 , G01N33/00 , G01N27/416
摘要： Element resistance of an oxygen sensor is determined by setting a time constant corresponding to a frequency at which the impedance characteristics of the sensor are stable, applying a changing voltage having the time constant, and determining the resulting current and hence the sensor impedance. Air-fuel ratio sensor 30 generates linear signals proportional to concentration of oxygen in exhaust gas from an engine 11. A bias command signal vr is converted to an analog signal Vb by D/A converter 21 and high frequency components are removed by low pass filter LPF 22. The output voltage vc of the LPF 22 is provided to a bias control circuit 40. A single AC signal which has a predetermined frequency and which is provided with a predetermined time constant of about 159 ~s by the LPF 22 is applied to the air-fuel ratio sensor 30. Element resistance R of the air-fuel ratio sensor 30 is detected based on the voltage of the AC signal and the change in the current level Ip of the air-fuel ratio sensor 30 caused by the application of the AC signal.

20. 发明专利

GB2310725A Determining resistance of oxygen sensor 未知
公开(公告)号：GB2310725A
公开(公告)日：1997-09-03
申请号：GB9704113
申请日：1997-02-27
申请人： DENSO CORP
发明人： TAKAMI MASAYUKI , MIZOGUCHI TOMOMICHI , HASEDA SATOSHI , OKAZAKI KAZUHIRO , JONO KOJI
IPC分类号： G01N27/41 , F02D41/14 , G01N27/406 , G01N33/00 , G01N27/417

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