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31. 发明专利

JPH115417A DEVICE FOR DETERMINING TIRE PNEUMATIC PRESSURE AND METHOD THEREOF 失效
公开(公告)号：JPH115417A
公开(公告)日：1999-01-12
申请号：JP17630397
申请日：1997-06-16
申请人： TOYOTA MOTOR CORP
发明人： OHASHI HIDEKI , KOJIMA HIROYOSHI , HARADA MOTOO , YONETANI MASAHIRO , MORI YUKIO , INOUE YUICHI , UMENO KOJI
IPC分类号： B60C23/00 , B60C23/02
摘要： PROBLEM TO BE SOLVED: To prevent erroneous determination in determining the presence or absence of a decrease in tire pneumatic pressures even if a change is applied to a factor causing an effect on a resonant phenomenon due to the coupled vibration of a tire and a suspension. SOLUTION: A ROM 300 beforehand stores m pieces of alarm threshold values used for determining the presence or absence of a decrease in tire pneumatic pressures. When an alarm threshold value selecting part 240 receives instructions on changing the selective threshold value from a jig 700 specialized for changing the threshold value, determination is made that selective threshold value change conditions have been established. When the alarm threshold value selecting part 240 receives instructions on number i corresponding to the alarm threshold value Ki to be changed, the threshold value selecting part 240 accepts the number i to write the number i in an EEPROM 400. Next, when a vehicular ignition switch is in an 0N state, an alarm threshold value reading part 230 reads the number i from the EEPROM 400 and reads out the alarm threshold value Ki corresponding to the number i from the ROM 300. The result selects the alarm threshold value Ki as a new selecting threshold value.

32. 发明专利

JP2002337521A DEVICE FOR ESTIMATING PNEUMATIC PRESSURE OF TIRE 失效
公开(公告)号：JP2002337521A
公开(公告)日：2002-11-27
申请号：JP2001149706
申请日：2001-05-18
申请人： DENSO CORP
发明人： INOUE YUICHI
IPC分类号： B60C23/06
摘要： PROBLEM TO BE SOLVED: To extract correct frequency information considering the influence by noise components. SOLUTION: First to fourth filtering operations are performed by using low-pass filter and high-pass filter of different cut-off frequency. After operating the sum of products after each filtering operation, the frequency corresponding to the resonance frequency is obtained from each operation result of the sum of products. Since the obtained frequency has different influential degree of the noise components, the frequency with less influential degree of the noise components is selected from the obtained frequency. The frequency obtained by smoothing the selected frequency is employed as the resonance frequency for estimating the tire pneumatic pressure.

33. 发明专利

JP2002082123A WHEEL ROTATION INFORMATION DETECTOR 失效
公开(公告)号：JP2002082123A
公开(公告)日：2002-03-22
申请号：JP2000275307
申请日：2000-09-11
申请人： DENSO CORP
发明人： INOUE YUICHI , TAGUCHI TAKEYASU
IPC分类号： B60C23/06 , G01L17/00 , G01P3/44 , G01P3/489 , G01P3/56 , G01P15/16
摘要： PROBLEM TO BE SOLVED: To accurately obtain information on rotation without so much time taken after the start of a vehicle, while reducing the consumption a microcomputer resources. SOLUTION: An integrated value Δtsum of pulse interval Δt per rotation of a signal rotor is previously calculated, and when the next pulse interval Δt (m) past the one rotation is gained, once after the updating of the integrated value Δtsum has been made, an average pulse interval Δtave as the mean of the integrated value Δtsum is determined. In other words, pulse information is extracted, based on time information required for one rotation of a tire. After one rotation of the tire has been made, the pulse information is obtained with the uniformity the same as that for one rotation earier. This enables replacement of the pulse information obtained one rotation earier with the pulse information obtained for the present rotation thereby facilitating the gaining of the pulse information with the uniformity cancelled.

34. 发明专利

JP2001063327A TIRE INFLATION PRESSURE ALARM DEVICE 失效
公开(公告)号：JP2001063327A
公开(公告)日：2001-03-13
申请号：JP24338999
申请日：1999-08-30
申请人： DENSO CORP
发明人： NAITO TOSHIHARU , SAWADA MAMORU , TAGUCHI TAKEYASU , INOUE YUICHI
IPC分类号： B60C23/02 , B60C23/00 , B60C23/06 , G01L17/00
摘要： PROBLEM TO BE SOLVED: To alarm reduction of inflation pressure while a vehicle is stopped by giving outside shock to tires on the basis of rotation fluctuation force of an axle, detecting vibration, calculating natural frequency or resonance frequency of vibration, and detecting a condition of tire inflation pressure comparing with its judged value. SOLUTION: In this device, tire inflation pressure is estimated on the basis of a concrete relation between tire inflation pressure and natural frequency estimated from a wheel speed signal, and it is judged whether the tire inflation pressure is a limit value having an effect on vehicle driving or not. A vibration cycle T is measured from a rectangular wave, and the natural frequency fkt of rotation vibration of the twist direction of the tire is calculated (Step 140). A resonance phenomenon is generated on the tire as a vibration input to the tire by brake hydraulic fluctuation and the like, and a resonance frequency is found out. The calculated natural frequency fkt and an inflation pressure reduction judging value fot which is set beforehand are compared with each other. In the case where inflation pressure is in an abnormal condition, an alarm for informing reduction of inflation pressure is outputted to alert a driver (Step 160, 170).

35. 发明专利

JPH11348758A VEHICLE CONTROL DEVICE 失效
公开(公告)号：JPH11348758A
公开(公告)日：1999-12-21
申请号：JP13564899
申请日：1999-05-17
申请人： DENSO CORP
发明人： INOUE YUICHI , FUJIMOTO SHIYUUSAKU
IPC分类号： B60W10/04 , B60T8/172 , B60T8/175 , B60T8/58 , B60W10/00 , B60W10/06 , B60W10/18 , B60W10/188 , B60K41/20
摘要： PROBLEM TO BE SOLVED: To enhance responsiveness of control by providing a standby control means of driving a pump based on a reference lower than the reference of execution of the control means before starting of the control means. SOLUTION: In the case of an actual throttle opening higher than a reference throttle opening, the driving of a pump 52 is started by estimating an acceleration slip to be generated when an output of an internal combustion engine responds to the throttle opening and starting standby control. A drive pattern of hydraulic control valves 50RL, 50RR is determined by deciding a slip condition at present based on various wheel speed information. Acceleration slip control is ended at the time that the throttle opening is placed in a fully closed condition or that a drive wheel speed is less than a driven wheel speed for a prescribed time.

36. 发明专利

JP2001105813A TIRE AIR-PRESSURE DETECTION DEVICE 失效
公开(公告)号：JP2001105813A
公开(公告)日：2001-04-17
申请号：JP28269299
申请日：1999-10-04
申请人： NIPPON SOKEN , DENSO CORP
发明人： TOMINAGA MOTONORI , INOUE YUICHI
IPC分类号： B60C23/06 , G01L17/00
摘要： PROBLEM TO BE SOLVED: To improve an S/N ratio of a wheel speed sensor. SOLUTION: This tire pressure detection device estimating a tire air-pressure based on output of wheel speed sensors 6a-6d abstracts undulation components in output signals of the wheel speed sensors 6a-6d, and decides noise components caused by rotational vibration of the wheel speed sensors 6a-6d themselves.

37. 发明专利

JPH11235906A TIRE AIR PRESSURE ESTIMATING DEVICE 失效
公开(公告)号：JPH11235906A
公开(公告)日：1999-08-31
申请号：JP21121898
申请日：1998-07-27
申请人： DENSO CORP
发明人： NAITO TOSHIHARU , TAGUCHI TAKEYASU , KABUNE HIDEKI , INOUE YUICHI , ONOKI NOBUYOSHI
IPC分类号： G01L17/00 , B60C23/06 , B60C23/20
摘要： PROBLEM TO BE SOLVED: To provide a tire air pressure estimating device profitable in the point of cost. SOLUTION: This device is provided with a signal processor device 6, which has in a cover a wheel speed detection means detecting a wheel speed signal of each wheel at running time of a vehicle, extraction means extracting a resonance frequency of a tire vibration component or a tire spring constant based on the wheel speed signal, air pressure estimation means, and a decision means deciding whether an air pressure is abnormal or not. A tire temperature correlation value related to a tire temperature is extracted of an external factor giving a n influence to the extracted resonance frequency or spring constant, a correction means correcting a decision value in the decision means based on the tire temperature correlation value is provided, and a temperature sensitive element detecting a temperature in the signal processor device as the outside air temperature, for extracting the tire temperature correlation value used in this correction means, is arranged in the signal processor device 6.

38. 发明专利

JP2001108552A TIRE PNEUMATIC PRESSURE ESTIMATING APPARATUS 失效
公开(公告)号：JP2001108552A
公开(公告)日：2001-04-20
申请号：JP28541199
申请日：1999-10-06
申请人： NIPPON SOKEN , DENSO CORP
发明人： TOMINAGA MOTONORI , INOUE YUICHI
IPC分类号： B60C23/00 , G01L17/00
摘要： PROBLEM TO BE SOLVED: To enhance the S/N ratio of a wheel speed sensor. SOLUTION: The noise vibration of a driving system is specified.

39. 发明专利

JPH1073613A DETECTING APPARATUS FOR SPEED OF ROTATING BODY 失效
公开(公告)号：JPH1073613A
公开(公告)日：1998-03-17
申请号：JP24899996
申请日：1996-08-29
申请人： DENSO CORP
发明人： INOUE YUICHI , TAGUCHI TAKEYASU
IPC分类号： G01P3/489 , B60C23/06
摘要： PROBLEM TO BE SOLVED: To obtain a detecting apparatus which enhances the correction accuracy of a detection error due to the nonstandard element of a pulse signal generated by the rotation of a rotating body to be measured and whose costs are reduced. SOLUTION: An electronic control device 14 is provided with an integration means, with a storage means and with a mean computing means. Pulse signal cycles are integrated sequentially at every pulse signal train which is composed of a plurality of pulse signals. When all the pulse signal cycles in the pulse signal train are integrated, an integrated value is written into the storage means, and the storage means always stores the latest integrated value, in one rotation portion, of a rotating object 12 to be measured. The mean computing means computes the mean value of the pulse signal cycles on the basis of the total value of the integrated value. By this constitution, the mean value of the pulse signal cycles in one rotation portion is obtained as a learning reference value in a correction operation without storing all the pulse signal cycles in one rotation portion. Thereby, it is possible to obtain a detecting apparatus which enhances the correction accuracy of a detection error and whose costs are reduced.

40. 发明专利

JPH1071819A TIRE ABNORMALITY DETECTING DEVICE 失效
公开(公告)号：JPH1071819A
公开(公告)日：1998-03-17
申请号：JP24900096
申请日：1996-08-29
申请人： DENSO CORP
发明人： INOUE YUICHI , TAGUCHI TAKEYASU
IPC分类号： G01P3/42 , B60C23/06
摘要： PROBLEM TO BE SOLVED: To obtain detailed information about not only the presence or absence of a tire abnormality occurrence in a vehicle but also a tire in which abnormality has occurred. SOLUTION: The device comprises rotation detecting means 3a to 3d which detect every passage of rotation detecting parts 21 formed on bodies of rotation 2a to 2d in the circumferential direction, the bodies of rotation 2a to 2d rotating together with tires 1a to 1d as one body, and an electronic control system 4 into which the detection signals obtained by the rotation detecting means 3a to 3d are inputted. The electronic control system 4 comprises an amount of shift dependent value computing means which computes an amount of shift dependent value which depends on the amount of shift of the frequency of the detection signals from the reference value, a feature variable computing means which computes a feature variable representing the feature of the computed amount of shift dependent value and a judging means which judges normality or abnormality of the condition of a tire with two values on the basis of the feature variable.

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