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11. 发明专利

JPH082221A ABNORMAL TIRE PRESSURE JUDGING DEVICE 失效
公开(公告)号：JPH082221A
公开(公告)日：1996-01-09
申请号：JP13850194
申请日：1994-06-21
申请人： TOYOTA MOTOR CORP , TOYOTA CENTRAL RES & DEV , NIPPON DENSO CO
发明人： OHASHI HIDEKI , KAWAI HIROYUKI , KOJIMA HIROYOSHI , UMENO KOJI , ASANO KATSUHIRO , ONOKI NOBUYOSHI , INOUE YUICHI
IPC分类号： B60C23/06
摘要： PURPOSE:To reconcile the accurateness and readiness of a judgment by performing this judgment in due consideration of a fact that there is the longer in tire operating time, the higher in a possibility that air pressure might go down due to a natural leakage, in a device which detects the inflation pressure and.judges whether it is abnormally low or not. CONSTITUTION:In a device which detects the revolving speed of a wheel by a solenoid pickup 12, a waveform shaper 18 and a computer 20, estimating the extent of tire pressure on the basis of the revolving speed, and jedges that it is abnormally low in the case where the inflation pressure is less than the reference value, tire operating time is measured by a clock 70, and this reference value in case of longer in the tire operating time is altered so as to become larger than that in time of shorter.

12. 发明专利

JPH07329526A WHEEL CHARACTERISTIC VALUE ESTIMATING DEVICE 失效
公开(公告)号：JPH07329526A
公开(公告)日：1995-12-19
申请号：JP12385894
申请日：1994-06-06
申请人： TOYOTA MOTOR CORP , TOYOTA CENTRAL RES & DEV , NIPPON DENSO CO
发明人： OHASHI HIDEKI , KAWAI HIROYUKI , KOJIMA HIROYOSHI , UMENO KOJI , ASANO KATSUHIRO , NAITO TOSHIHARU , ONOKI NOBUYOSHI
IPC分类号： G01L17/00 , B60C23/00 , B60C23/06
摘要： PURPOSE:To improve precision of estimation by correcting base values for wheel characteristic values. CONSTITUTION:In a device to estimate a real value of a spring constant K by estimating change quantity DELTAK of the spring constant K based on a detection value of a rotation speed of a wheel and base values of moment of inertia J and the torsion spring constant K of the wheel as wheel characteristic values by a disturbance observer 52, a base value correction part 60 corrects the base value for the spring constant K at the disturbance observer 52 based on an estimated value of the change quantity DELTAK in such a way that the estimated value of the change quantity DELTAK is a reference value DELTAKs or less, and the base value of the spring constant K after correction is estimated to be a real value of the spring constant K.

13. 发明专利

JP2003333870A Inverter system 有权
标题翻译：逆变器系统
公开(公告)号：JP2003333870A
公开(公告)日：2003-11-21
申请号：JP2002140891
申请日：2002-05-16
申请人： Toyota Central Res & Dev Lab Inc , Toyota Motor Corp , トヨタ自動車株式会社 , 株式会社豊田中央研究所
发明人： ASANO KATSUHIRO , MORIYA KAZUNARI , OTANI HIROKI , NAKAI HIDEO , INAGUMA YUKIO , SASAKI SHOICHI , SHIYAMOTO SUMIKAZU , SATO EIJI , KOMATSU MASAYUKI
IPC分类号： H02M7/797 , H02M7/493 , H02M7/5387 , H02P27/06 , H02M7/48 , H02P7/63
摘要： PROBLEM TO BE SOLVED: To make it possible to freely set the voltage ratio of a power source at the input side of an inverter to the other power source connected between coils. SOLUTION: Output terminals of the inverter INV are connected to each terminal at both ends of coils L1, L2. A battery B is arranged between middle points of the coils L1, L2, and a capacitor C1 at the input side of the inverter INV. By adjusting the duty ratio of each transistor of the inverter INV, each input terminal of the coils L1, L2 is controlled independently, and thereby electric potentials at the middle points and phase currents of the coils L1, L2 are controlled. A current flows in such a way as to determine a voltage of the capacitor C1 so that the difference of the electric potentials at the middle points of the coil L1, L2 can become the same with the voltage of the battery B. As a result, the ratio of the voltage of the capacitor C1 to that of the battery B can be set freely. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：使得可以将逆变器的输入侧的电源的电压比自由设定为连接在线圈之间的另一个电源。
解决方案：反相器INV的输出端子连接到线圈L1，L2两端的每个端子。电池B布置在线圈L1，L2的中间点和反相器INV的输入侧的电容器C1之间。通过调整反相器INV的各个晶体管的占空比，线圈L1，L2的每个输入端子被独立地控制，从而控制线圈L1，L2的中间点和相电流的电位。 A电流以确定电容器C1的电压的方式流动，使得线圈L1，L2的中点处的电位差可以与电池B的电压相同。结果，可以自由地设定电容器C1的电压与电池B的电压的比。版权所有（C）2004，JPO

14. 发明专利

JP2003237560A MAXIMUM ROAD SURFACE FRICTION COEFFICIENT-ESTIMATING DEVICE 审中-公开
公开(公告)号：JP2003237560A
公开(公告)日：2003-08-27
申请号：JP2002040722
申请日：2002-02-18
申请人： TOYOTA CENTRAL RES & DEV , TOYOTA MOTOR CORP
发明人： UMENO KOJI , ASANO KATSUHIRO , ONO HIDEKAZU , SUGAI MASARU , ASAUMI SHU , IGAKI MUNEYOSHI , NONAKA MASAKATSU
IPC分类号： G01N19/02 , B60R16/02 , B60T8/172 , B60T8/1763 , B60T8/58
摘要： PROBLEM TO BE SOLVED: To accurately estimate a maximum road surface friction coefficient while considering various traveling situations. SOLUTION: A μ map estimation part 30 estimates the maximum road surface friction coefficient μ map during normal traveling. A μ g1 estimation part 40 estimates the maximum road surface friction coefficient μ g1 during acceleration or deceleration traveling. A μ g2 estimation part 50 estimates the maximum road surface friction coefficient μ g2 during rotation traveling. A μ g selection part 60 supplies μ max estimation part 80 with smaller one of the maximum road surface friction coefficient μ g1 and μ g2 as a maximum road surface friction coefficients μ g . A weight coefficient determination part 70 determines a weight coefficient K based on a grip grade Gr. The μ max estimation part 80 estimates a maximum road surface friction coefficient μ max based on the maximum road surface friction coefficients μ map and μ g and the weight coefficient K. COPYRIGHT: (C)2003,JPO

15. 发明专利

JP2002274356A ROAD SURFACE FRICTIONAL COEFFICIENT DETERMINING DEVICE 失效
公开(公告)号：JP2002274356A
公开(公告)日：2002-09-25
申请号：JP2001079153
申请日：2001-03-19
申请人： AISIN SEIKI , TOYOTA MOTOR CORP , TOYOTA CENTRAL RES & DEV
发明人： ONOZAWA SATOSHI , ONUMA YUTAKA , ASANO KATSUHIRO , ONO HIDEKAZU , UMENO KOJI
IPC分类号： G01P3/56 , B60R16/02 , B60T8/172 , B60T8/58 , G01N19/02
摘要： PROBLEM TO BE SOLVED: To provide a road surface frictional coefficient determining device capable of accurately determining a frictional coefficient between a road surface and tires used in control of a vehicle as a whole. SOLUTION: Respective wheel speeds of a plurality of wheels provided on the vehicle are detected by a wheel speed sensor 12. Frictional coefficients between the road surface and the tires provided on the plurality of wheels, respectively, are estimated per wheel by a four wheel road surface μ estimating means 20 on the basis of the respective detected wheel speeds of the plurality of wheels. The frictional coefficient between the road surface and the tires of the vehicle as a whole is determined by a road surface μ determining means 40 on the basis of the determined plurality of frictional coefficients.

16. 发明专利

JP2001287518A TIRE PARAMETER ESTIMATING DEVICE AND ROAD SURFACE DETERMINATION DEVICE 失效
公开(公告)号：JP2001287518A
公开(公告)日：2001-10-16
申请号：JP2000103965
申请日：2000-04-05
申请人： TOYOTA CENTRAL RES & DEV , TOYOTA MOTOR CORP , AISIN SEIKI , DENSO CORP
发明人： YAMAGUCHI HIROYUKI , AMANO YASUSHI , ASANO KATSUHIRO , SUGIURA NOBORU , MIYASHITA MASANORI , WATANABE YOSHITOSHI , TANAKA AKIRA , YASUI YOSHIYUKI , SAWADA MAMORU
IPC分类号： G01M17/02 , B60C11/24 , B60C19/00 , B60C23/00 , B60C23/20 , B60T8/00 , B60T8/172 , B60T8/1763 , B60T13/66 , G01K7/42
摘要： PROBLEM TO BE SOLVED: To estimate a tire parameter with high accuracy while suppressing cost and considering condition of a vehicle and road environment. SOLUTION: A μ grade detecting circuit 12 detects a μ grade based on a wheel speed detected by a wheel speed detecting circuit 11. A grade value comparison circuit 40 calculates a μ grade average μr, which is an average of μ grades detected by the μgrade detecting circuit 12, and further calculates a rate of the μgrade average μr to a μ grade initial value μI; Rate (=μr/μI). A tire temperature estimating circuit 51 stores a table showing a relationship between the Rate and a tire temperature and estimates the tire temperature corresponding to the Rate calculated by the grade value comparison circuit 40 as a current tire temperature.

17. 发明专利

JP2001088679A ABS CONTROLLER 失效
公开(公告)号：JP2001088679A
公开(公告)日：2001-04-03
申请号：JP27219999
申请日：1999-09-27
申请人： TOYOTA CENTRAL RES & DEV , TOYOTA MOTOR CORP , AISIN SEIKI , DENSO CORP
发明人： ONO HIDEKAZU , ASANO KATSUHIRO , SUGAI MASARU , UMENO KOJI , YAMAMOTO MASANORI , ITO SHOJI , YASUI YOSHIYUKI , ONOZAWA SATOSHI , FUJIMOTO SHIYUUSAKU
IPC分类号： B60T8/58 , B60T8/172 , B60T8/174 , B60T8/72
摘要： PROBLEM TO BE SOLVED: To appropriately start ABS control. SOLUTION: A grip state estimation means 10 estimates a road surface μm in ordinary traveling, namely, non-operation state of ABS and outputs a road surface μ gradient and the road surface μ as tire grip state quantities. When the tire grip state quantity is smaller than the reference value, a target deceleration initial value computing means 12 sets the initial value of the target deceleration to be a reference of starting the ABS control smaller than usual. A wheel deceleration computing means 16 computes the wheel speed and wheel deceleration and inputs the computed wheel deceleration in a difference calculator 18. When the wheel deceleration becomes larger than the initial value of the target deceleration, an ABS control start judgment means 20 outputs ABS control start signals. When the ABS control start signals are inputted, an ABS control means 22 starts the ABS control and reduces the wheel cylinder oil pressure so as to prevent the wheel from being locked.

18. 发明专利

JP2000108863A PHYSICAL QUANTITY ESTIMATING DEVICE AND ABS CONTROLLER 失效
公开(公告)号：JP2000108863A
公开(公告)日：2000-04-18
申请号：JP28166098
申请日：1998-10-02
申请人： TOYOTA CENTRAL RES & DEV , TOYOTA MOTOR CORP , AISIN SEIKI
发明人： ONO HIDEKAZU , SUGAI MASARU , UMENO KOJI , ASANO KATSUHIRO , YAMAGUCHI HIROYUKI , ITO SHOJI , ONOZAWA SATOSHI
IPC分类号： B60T8/17 , B60T8/172 , B60T8/1761 , B60T8/58 , B60T8/00
摘要： PROBLEM TO BE SOLVED: To accurately estimate an adhesion gradient. SOLUTION: The wheel speed signal of each wheel detected by a wheel speed sensor 10 is inputted to a band-pass filter 12, the signal of a frequency band unrelated to spring lower resonance is eliminated from the wheel speed signal, and only the signal of a frequency band related to the spring lower resonance is outputted. An adhesion gradient estimating device 14 identifies the attenuation factor of a secondary resonance model proximate a suspension tire resonance model from the signal outputted from the band-pass filter 12 by an on-line identifying method, and estimates an adhesion gradient from the identified attenuation factor. The attenuation factor of the secondary resonance model corresponds to the adhesion gradient, the adhesion gradient is estimated to be large when the attenuation factor is identified to be small, and the attenuation factor is estimated to be small when the adhesion gradient is identified to be large.

19. 发明专利

JPH08132931A TRAVEL CONTROL DEVICE FOR VEHICLE 失效
公开(公告)号：JPH08132931A
公开(公告)日：1996-05-28
申请号：JP27881694
申请日：1994-11-14
申请人： TOYOTA MOTOR CORP , TOYOTA CENTRAL RES & DEV
发明人： SATONAKA HISASHI , HASHIMOTO YOSHIYUKI , ASANO KATSUHIRO , HATTORI YOSHIKAZU
IPC分类号： B60W10/04 , B60W10/00 , B60W10/06 , B60W10/18 , B60W10/184 , B60W30/00 , B60W30/16 , B60W40/09 , F02D9/02 , F02D29/02 , B60K41/20
摘要： PURPOSE: To provide a travel control device performing vehicle speed control and alarm control with timing coinciding with the operating timing of a driver during follow-up travel. CONSTITUTION: An inter-vehicle distance sensor and a vehicle speed sensor 12 are provided to detect the speed of an own vehicle, relative speed and inter- vehicle distance. A control device ECU14 computes brake starting inter-vehicle distance under the fixed condition of deceleration on the basis of a specified driver model equation and compares it with the present inter-vehicle distance so as to control a brake 20 and a throttle 22 to control the vehicle speed and also to control a display 24 and a speaker 26 to output an alarm. The driver model equation is determined according to the limit inter-vehicle time and the deceleration of a driver, and the parameter thereof is adjusted on the basis of the measured data so as to coincide with the driver.

20. 发明专利

JPH07318574A WHEEL SPEED DETECTOR 失效
公开(公告)号：JPH07318574A
公开(公告)日：1995-12-08
申请号：JP10939694
申请日：1994-05-24
申请人： TOYOTA MOTOR CORP , TOYOTA CENTRAL RES & DEV
发明人： OHASHI HIDEKI , KAWAI HIROYUKI , KOJIMA HIROYOSHI , ASANO KATSUHIRO , UMENO KOJI
IPC分类号： G01P3/489 , G01P3/44
摘要： PURPOSE:To obtain a wheel speed detector in which a periodic disturbance can be removed from the wheel speed. CONSTITUTION:An electromagnetic pickup 12 detects passage of a rotor 10, rotating with a wheel, through each tooth to produce a corresponding pulse signal. A computer 20 determines the rotational speed of wheel sequentially based on each pulse signal and a variation from the average value of a plurality of rotational speeds is stored sequentially, as a variation rotational speed, in a RAM 44. A variation rotational speed, determined just one revolution before the current variation rotational speed, is then selected among a plurality of prestored variation rotational speeds and the difference is determined thus removing a periodic error from the rotational speed.

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