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41. 发明专利

JPH0789304A DISTURBANCE DETECTING DEVICE FOR WHEEL AND APPLICATION METHOD THEREFOR 失效
公开(公告)号：JPH0789304A
公开(公告)日：1995-04-04
申请号：JP10939794
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 , HIRAIWA NOBUO , ASANO KATSUHIRO , UMENO KOJI , TAKAHASHI TOSHIMICHI
IPC分类号： G01P3/44 , B60C23/00 , B60C23/06 , G01L5/00 , G01L17/00
摘要： PURPOSE:To contrive detection of disturbance and detection of a characteristic change in wheels, behavior and the like by estimating the disturbance to the wheels by a disturbance observer from the moment of inertia and the angular velocity detected by an angular velocity detecting device for the wheels. CONSTITUTION:Voltage by a rotor 10, teeth 16 and an electromagnetic pickup 12 arranged on wheels is inputted to an I/O port of a computer 20 together with a signal of an actual car speed detecting device 70 through a waveform shaper 18, and operation on rim side rotational speed and operation on a correction value to respective the wheels are carried out by a control program stored in a ROM42. Output of the computer 20 is inputted to a computer 47 to a fulfill functions of a disturbance observer a preprocessing part, a correlation operation part and the like together with a signal of a driving-braking torque detecting device 68, and prescribed operation is carried out, and a result is outputted to a display device 66 from an I/O port 51, and a driver is informed of a disturbance condition to the wheels by a judged result. Thereby, since disturbance to the wheels can be detected easily, the driver can take a counter measure against it.

42. 发明专利

JPH0493662A YAW RATE DETECTOR FOR VEHICLE 失效
公开(公告)号：JPH0493662A
公开(公告)日：1992-03-26
申请号：JP19821390
申请日：1990-07-26
申请人： TOYOTA MOTOR CORP
发明人： KAWAI HIROYUKI
IPC分类号： G01C19/56 , B62D6/00 , B62D101/00 , B62D113/00 , B62D137/00 , G01C19/5628 , G01P15/00
摘要： PURPOSE:To avoid giving any incompatible feeling to a driver by assembling an angular velocity sensor to a car body so as to make one axis of a base tilt rearward the car body as far as some angle to a vertical axis. CONSTITUTION:In the state that ac voltage is impressed on exciting piezoelectric elements 15, 16 and each of plate parts 13b, 14b of vibrating pieces 13, 14 is excited in a alpha direction, if an angular velocity sensor 10 is rotated around an axis A at an angular velocity omega (yaw rate omega), namely, when a base consisting of a lower case 11 and a pedestal 12 is rotated around the axis A at the angular velocity omega, Coriolis force Fc works on these plate parts 13b, 14b in a beta direction. This Coriolis force Fc is expressed with an equation of Fc = 2mVe x omega (m shows each mass of these plate parts 13b, 14b and Ve is velocity in the omega direction by the said excitation of these plate parts 13b, 14b) while it is detected by piezoelectric elements 17, 18, so that the angular velocity omega (yaw rate omega) is detected. In the angular velocity sensor 10 constituted like this, its axis A is tilted rearward as far as a specified angle thetao with the vertical axis and locked onto a car body BD in and around the central position, if possible.

43. 发明专利

JPH06278633A FOUR-WHEEL STEERING DEVICE 失效
公开(公告)号：JPH06278633A
公开(公告)日：1994-10-04
申请号：JP8937893
申请日：1993-03-24
申请人： AISIN SEIKI , TOYOTA MOTOR CORP
发明人： KAWAI TANEICHI , KUZUTANI HIDEKI , UEHARA YASUO , KAWAI HIROYUKI
IPC分类号： B62D6/00 , B62D7/14 , B62D101/00 , B62D113/00 , B62D117/00
摘要： PURPOSE:To improve the traveling stability and the steerability by dividing the steering angular velocity into the regions of the specified number, setting the in-phase gain coefficient to the specified value in the minimum region, then, setting the in-phase gain coefficient to be smaller than the specified value in the following region, while setting the in-phase gain coefficient to be larger than the specified value in the following region. CONSTITUTION:An in-phase gain coefficient converting means 21 sets the in- phase gain coefficient K2 by the specified map based on the steering angular velocity to be outputted by a steering angle velocity computing means 20. This map divides the steering angular velocity into three regions, and the specified in-phase gain coefficient is set in the first region of the minimum value. Then, in the second region which is larger than the first one, the specified in-phase gain coefficient is set to be smaller than that of this first region, while in the third region which is larger than the second one, the specified in-phase gain coefficient is set to be larger than that of this first region. These respective in-phase gain coefficients K2 are received by a switching computing means 12 to correct the steering angle coefficient K1.

44. 发明专利

JPH06127287A WHEEL TURNING LIMIT JUDGING DEVICE 失效
公开(公告)号：JPH06127287A
公开(公告)日：1994-05-10
申请号：JP30754092
申请日：1992-10-21
申请人： TOYOTA MOTOR CORP
发明人： KAWAI HIROYUKI
IPC分类号： B60K28/14
摘要： PURPOSE:To provide more reliable judgment of whether a wheel reaches a turning limit or not by detecting that the cornering force of a vehicle gets to a peak from an inclination of a line connecting points to an original point on a curve representing a relationship between the cornering force and a wheel slip angle rather than from a differentiation between the cornering force and the wheel slip angle. CONSTITUTION:A wheel slip angle alpha and cornering force CF are respectively calculated in accordance with the lateral acceleration GY and yaw rate gamma of a vehicle (S2-5), to judge whether a value of CF divided by alpha is smaller than a reference value K or not (S6-8). If so, a wheel is judged to be in a turning limit. So, the correct judgment of the turning limit can be made, which is not affected by the errors of short cycle waves placed over an ideal curve representing a relationship between CF and alpha and taken as an actual curve.

45. 发明专利

JPH1181946A VARIABLE VALVE SYSTEM FOR ENGINE 失效
公开(公告)号：JPH1181946A
公开(公告)日：1999-03-26
申请号：JP24871997
申请日：1997-09-12
申请人： AISIN SEIKI , TOYOTA MOTOR CORP
发明人： KAWAI HIROYUKI , MIYAJI EIJI , ADACHI KAZUNARI , NAGAE MASAHIRO
IPC分类号： F01L1/14 , F01L13/00
摘要： PROBLEM TO BE SOLVED: To prevent interference between a plate which slides being engaged with an inner body, from an outer body so as to limit the relative motion of both bodies with respect to each other, and the inner body. SOLUTION: A lifter 20 is composed of an outer body 22 adapted to slide in a bore formed in a cylinder head 11 of an engine, and driven by a cam shaft 12, and an inner body 23 slidably accommodated in the outer body 22, for driving a valve, and a plate 26 for limiting relative motion between the outer body 22 and the inner body 23, is held in the inner body 23 so as to be axially slidable within a predetermined range, being adapted to be moved relative to the inner body 23 in response to an inertia force caused by the drive of the inner body 23, in order to restrain the timing of slidable motion of the plate 26 while the restraint of the plate 26 is released by a deviation between the relative positions of the inner body 23 and the outer body 22.

46. 发明专利

JPH10193935A TIRE PNEUMATIC PRESSURE ABNORMALITY JUDGING DEVICE 失效
公开(公告)号：JPH10193935A
公开(公告)日：1998-07-28
申请号：JP1342197
申请日：1997-01-09
申请人： TOYOTA MOTOR CORP , DENSO CORP , TOYOTA CENTRAL RES & DEV
发明人： OHASHI HIDEKI , KAWAI HIROYUKI , KOJIMA HIROYOSHI , SUZUKI MOTOJI , FUJIWARA KENJI , UMENO KOJI
IPC分类号： G01L17/00 , B60C23/06
摘要： PROBLEM TO BE SOLVED: To improve accuracy in judging the abnormality of a tire pneumatic pressure by providing a means which calculates the rotational vibration level of the tire in a prescribed time and, when vibration level reaches a prescribed value or more, judges the abnormality of the tire pneumatic pressure. SOLUTION: A tire pneumatic pressure judging device is provided with a normalization permission judging value calculation block 34. The normalization permission judgment calculating block 34 calculates the normalization judgment value, a level of relative rotational vibration between a belt side part and a rim side part based on an estimation value of the angular velocity of a belt side part estimated by a disturbance observer 30 and the angular velocity of the rim side part calculated as a wheel speed by a pulse signal from wheel speed sensors 12FL-12RR. A normalization block 36 judges whether the normalization permission judgment value is a standard value or more. When it is the standard value or more, it is normalized, an abnormality judgment block 38 calculates variation of a spring constant, and the abnormality of the tire pneumatic pressure is judged based on this variation.

47. 发明专利

JPH08230422A TIRE AIR PRESSURE ESTIMATING DEVICE 失效
公开(公告)号：JPH08230422A
公开(公告)日：1996-09-10
申请号：JP27833895
申请日：1995-10-02
申请人： TOYOTA MOTOR CORP , NIPPON DENSO CO , TOYOTA CENTRAL RES & DEV
发明人： OHASHI HIDEKI , KAWAI HIROYUKI , KOJIMA HIROYOSHI , ASANO KATSUHIRO , UMENO KOJI , NAITO TOSHIHARU , ONOKI NOBUYOSHI , INOUE YUICHI
IPC分类号： G01L17/00 , B60C23/00 , B60C23/06
摘要： PURPOSE: To eliminate an influence of a driving system resonance in estimation of a tire air pressure so as to precisely estimate a tire air pressure in a driving wheel. CONSTITUTION: A tire air pressure estimating device is provided with vehicle speed sensors 42L, 42R detecting wheel speeds of a left driving wheel and a right driving wheel, disturbance observers 34L, 34R extracting vibration constituents, which is due to vibration of a tire, of the wheel speeds of the left and the right driving wheels from wheel speed signals obtained from the wheel speed sensors for the left and the right driving wheels, a driving system resonance compensation computing block 36 which finds vibration constituents of the wheel speeds of the left and the right driving wheels after correction by subtracting the same phase constituent from the vibration constituents of the wheel speeds of the left and the right driving wheels, and an air pressure estimating block 40 estimating tire air pressures of the left and the right driving wheels on the basis of the vibration constituents of the wheel speeds of the left and the right driving wheels after correction.

48. 发明专利

JPH08156536A TIRE INFLATION PRESSURE ESTIMATING DEVICE 失效
公开(公告)号：JPH08156536A
公开(公告)日：1996-06-18
申请号：JP33106894
申请日：1994-12-08
申请人： TOYOTA MOTOR CORP , TOYOTA CENTRAL RES & DEV , NIPPON DENSO CO
发明人： OHASHI HIDEKI , KAWAI HIROYUKI , KOJIMA HIROYOSHI , ASANO KATSUHIRO , UMENO KOJI , NAITO TOSHIHARU , ONOKI NOBUYOSHI
IPC分类号： B60C23/00 , B60C23/06 , G01L17/00
摘要： PURPOSE: To estimate inflation pressure with a sufficient frequency even when a vehicle travels on a good road such as an expressway. CONSTITUTION: This device has a device 12 for detecting the magnitude of vibration input from a road surface to a tire, a device 10 for determining the spring constant of the tire on the basis of a wheel speed signal when the magnitude of vibration input is within a prescribed range, and estimating the pneumatic pressure of the tire. It also has a vehicle speed detecting device 20, and a device 14 for extending the prescribed range to the side having the smaller magnitude of vibration input when the vehicle speed is high.

49. 发明专利

JPH08132831A WHEEL CONDITION DETECTING DEVICE BY TIRE UNIFORMITY COMPONENT 失效
公开(公告)号：JPH08132831A
公开(公告)日：1996-05-28
申请号：JP30312094
申请日：1994-11-11
申请人： NIPPON DENSO CO , TOYOTA MOTOR CORP , TOYOTA CENTRAL RES & DEV
发明人： TOMIITA KENJI , ONOKI NOBUYOSHI , OHASHI HIDEKI , KAWAI HIROYUKI , KOJIMA HIROYOSHI , UMENO KOJI , ASANO KATSUHIRO
IPC分类号： B60C23/06
摘要： PURPOSE: To obtain necessary condition information to determine various wheel conditions by finding tire uniformity components and conducting arithmetic processing based on the components. CONSTITUTION: A rotating signal from an electromagnetic pickup 13 approaching the outer periphery by teeth structure of a signal rotor 12 of a wheel speed detecting mechanism 11 is inputted to an electronic control unit(ECU) 14, and from a rotating signal obtained, such a data that a value in an ideal tire uniformity condition becomes zero is defined as a tire uniformity component as an amount representing the uniformity of a tire and extracted. By processing the signal based on the tire uniformity component, the condition of the tire is characterized, and various wheel conditions are determine to apply to various types of control.

50. 发明专利

JPH0815069A WHEEL INFORMATION ESTIMATING DEVICE 失效
公开(公告)号：JPH0815069A
公开(公告)日：1996-01-19
申请号：JP14364194
申请日：1994-06-24
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 the estimating accuracy of a wheel information estimating device which estimates the inflation pressure of a tire by supplying the detected rotating speed value of a wheel to a disturbance observer by rationalizing the observer. CONSTITUTION:A wheel information estimating device is provided with a pre- processing filter 64 between a detecting device composed of an electromagnetic pickup 12, waveform shaper 18, and computer 20 and a computer 47 incorporating a disturbance observer 52 and the filter 64 is constituted to have such a characteristic that the filter 64 only extracts a frequency component which falls within the frequency range suitable for estimating the inflation pressure of a tire by means of the observer 52 out of the frequency components of the detecting values of the rotating speed of the wheel. Since the detected rotating speed value of the tire is supplied to the observer 52 in a rationalized state, the tire inflation pressure estimating accuracy of a wheel information estimating device is improved.

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