公开(公告)号：JPH11310147A

公开(公告)日：1999-11-09

申请号：JP11746398

申请日：1998-04-27

Applicant: TOYOTA MOTOR CORP

Inventor： KOSHIRO TAKAHIRO ,  KAWAMURO JIYUNJI ,  MATSUDA MORIHIRO ,  SHINTO MASAHIKO

IPC: B62D5/00 ,  B62D5/04 ,  B62D6/00 ,  B62D101/00 ,  B62D113/00 ,  B62D117/00 ,  B62D137/00

Abstract: PROBLEM TO BE SOLVED: To restrain the occurrence of overshoot by motor intertia, and improve a steering feeling by controlling a speed of an actuator so that it becomes a target driving speed set by a driving speed setting means. SOLUTION: A transmission ratio variable mechanism 30 is formed as a mechanism capable of changing the transmission ratio of a rotation quantity between an input shaft and an output shaft by driving this gear mechanism by a servomotor 31 as an actuator by connecting an input shaft 20 and an output shaft 40 by the gear mechanism. A rotating speed sensor 32 to detect a rotating speed of the servomotor 31 is arranged in the servomotor 31. Respective detecting results of a steering speed θhv detected by a steering speed sensor 21, a rotating speed θpv of the servomotor 31 detected by the rotating speed sensor 32 and a vehicle speed V detected by a vehicle speed sensor 60, the transmission ratio is set on the basis of these detecting results to control a rotating speed of the servomotor 31 according to the preset transmission ratio.

公开(公告)号：JPH11255139A

公开(公告)日：1999-09-21

申请号：JP5967198

申请日：1998-03-11

Applicant: TOYOTA MOTOR CORP

Inventor： SHINTO MASAHIKO ,  KOSHIRO TAKAHIRO ,  MATSUDA MORIHIRO ,  KAWAMURO JIYUNJI

IPC: B60G17/015 ,  B62D6/00 ,  B62D101/00 ,  B62D113/00 ,  B62D131/00 ,  B62D137/00

Abstract: PROBLEM TO BE SOLVED: To improve the steering property of a vehicle or the riding comfortableness of the vehicle by varying the transmission ratio of the steering quantity of a steering handle to the steering quantity of a steering wheel in the middle of a steering transmission system for connecting the steering handle to the steering wheel, and changing the movement characteristic of the vehicle according to the transmission ratio. SOLUTION: An upper steering shaft 12a is provided with a steering angle sensor 26 for detecting the steering angle of a steering shaft 10, and a lower steering shaft 12b is provided with an output angle sensor 28 for detecting the steering angle of a steering wheel. A variable gear ratio unit 14 varies the transmission ratio of the steering quantity of the steering handle 10 to the steering quantity of steering wheels 24FL, 24FR, and it comprises a reduction gear using a motor and an epicyclic gear mechanism or harmonic drive mechanism. According to this, the rolling of a vehicle body can be allowed to ensure the riding comfortableness while improving the response characteristic of the vehicle.

公开(公告)号：JPH11227622A

公开(公告)日：1999-08-24

申请号：JP3599098

申请日：1998-02-18

Applicant: TOYOTA MOTOR CORP

Inventor： MATSUDA MORIHIRO ,  KAWAMURO JIYUNJI ,  SHINTO MASAHIKO ,  KOSHIRO TAKAHIRO

IPC: B62D6/00 ,  B62D101/00 ,  B62D113/00 ,  B62D133/00 ,  B62D137/00

Abstract: PROBLEM TO BE SOLVED: To provide a vehicular steering control device which can prevent turbulence of the behavior of vehicle when it is running on a bad road. SOLUTION: This steering control device is structured so that a transmission ratio variable means 14 is interposed on the way of a steering transmitting system to couple a steering wheel 10 with each steering wheel 24 and is equipped with a control means 30 which controls the transmission ratio in accordance with the condition of the vehicle. The arrangement includes a vertical motion detecting means 34 to detect the vertical motions of the vehicle and a bad road condition detecting means 30 which detects the bad road condition on the basis of the vertical motions given by the detecting means 34. If the road surface is judged as in bad condition, the transmission ratio of the means 14 is shifted to a greater side by the control means.

公开(公告)号：JPH1149003A

公开(公告)日：1999-02-23

申请号：JP24426797

申请日：1997-09-09

Applicant: TOYOTA MOTOR CORP

Inventor： KOSHIRO TAKAHIRO ,  KAWAMURO JIYUNJI ,  MATSUDA MORIHIRO ,  SHINTO MASAHIKO

IPC: B62D1/16 ,  B62D5/00 ,  B62D5/04 ,  B62D6/00 ,  B62D101/00 ,  B62D113/00

Abstract: PROBLEM TO BE SOLVED: To enable a device to hold a relation between a steering amount of a steering handle and a steered amount of a steered wheel, even in the case of generating a reverse input from a wheel side during running. SOLUTION: In a steering device for a vehicle interposing in the halfway of a steering transmitting system, connecting a steering handle 10 and a steered wheel 24, a variable gear ratio unit 14 variably generating transmission ratio to be provided with an ECU28 variably controlling this variable gear ratio unit 14 in accordance with a vehicle condition, the variable gear ratio unit 14 is provided with a motor controlled by the ECU28 and a reduction gear mechanism having transmission ratio able to hold a steering angle of the steering handle to transmit rotation of the motor to an output side.

公开(公告)号：JPH10329731A

公开(公告)日：1998-12-15

申请号：JP14413897

申请日：1997-06-02

Applicant: TOYOTA MOTOR CORP

Inventor： SHINTO MASAHIKO ,  KAWAMURO JIYUNJI ,  MATSUDA MORIHIRO ,  KOSHIRO TAKAHIRO

IPC: B62D6/00 ,  B62D5/04 ,  B62D101/00 ,  B62D113/00

Abstract: PROBLEM TO BE SOLVED: To properly keep the relation between the steering quantity of a steering handle and the steering quantity of steering wheels even when there is an inverse input from the wheel side by controlling the operation of a variable transmission ratio means based on the rotating force of a motor in a vehicle having the variable transmission ratio means in the middle of a steering transmission system. SOLUTION: During the operation of a vehicle, an ECU 28 calculates the target steering angle based on the vehicle speed and steering angle obtained from sensors and outputs the control signal to a variable gear ratio unit 14 based on the target steering angle. It drive-controls the motor 40 of the variable gear ratio unit 14 and gives the steering angle corresponding to the target steering angle to steering wheels. When the deviation between the target steering angle and the actual steering angle becomes the prescribed value or above and the ECU 28 judges that there is an excessive inverse input from the side of the steering wheels, it drives a solenoid 58 to extract a slide pin 56 from a coupling recess 66, it directly connects a rotor 48 and a motor housing 44 with a friction member, and it stops the operation of the variable gear ratio unit 14.

公开(公告)号：JPH10180564A

公开(公告)日：1998-07-07

申请号：JP34094796

申请日：1996-12-20

Applicant: TOYOTA MOTOR CORP

Inventor： MATSUDA MORIHIRO ,  KISHIDA FUMIO ,  SHIOTANI SHIGEMI

IPC: B23P19/02

Abstract: PROBLEM TO BE SOLVED: To provide a tight fitting method for two members whereby a second member is given a kinetic energy and contacted with a first member. SOLUTION: The procedures to generate tight fitting comprise adapting a second member 12 by an adapting member 14 to a guide device 44 for guiding the second member 12 toward a first member 10, mounting the second member 12 on the guide device 44, and generating a tight fit by accelerating the second member 12 toward the first member 10 and causing the member 12 to make contact with the first member 10 while the member 12 is given a kinetic energy.

公开(公告)号：JPH0929157A

公开(公告)日：1997-02-04

申请号：JP18454195

申请日：1995-07-20

Applicant: TOYOTA CENTRAL RES & DEV ,  TOYOTA MOTOR CORP

Inventor： MATSUBARA HIROYUKI ,  WADA TAKASHI ,  MATSUDA MORIHIRO ,  ITO HIROSHI

IPC: G01B21/08 ,  B05C11/00 ,  B05D1/00

Abstract: PROBLEM TO BE SOLVED: To make it possible to rapidly and accurately obtain the predicted value of a final film thickness by measuring the thicknesses of the coating films after at least plural times of lapse time and arithmetically processing the prescribed prediction function which is the function of time in accordance with a statistical method by using the respective elapsed times and the measured film thicknesses. SOLUTION: The main section of the instrument for predicting the thicknesses of the coating films is composed of a contactless type film thickness measuring probe 10 for measuring the film thicknesses of a coating material in a non-contact state, a control circuit 20 for controlling the measurement of the film thicknesses and analyzing the results of the measurement and a display section 21 for displaying the contents of the analyses. The probe 10 is constituted by disposing an eddy current sensor 12 for measuring the distance to a conductive substrate and an optical distance sensor 13 of a specular reflection light receiving type into a container of a box type. The coating material is applied on the substrate surface and the thicknesses of the coating films are measured at least after three times of the lapsed time in order to predict the thicknesses of the coating films. The prescribed prediction function which is the function of the time is arithmetically processed in accordance with the statistical method by using the respective lapsed times and the measured film thicknesses. As a result, the predicted value of the final film thickness is obtd.

公开(公告)号：JPH08310431A

公开(公告)日：1996-11-26

申请号：JP12191095

申请日：1995-05-19

Applicant: TOYOTA MOTOR CORP

Inventor： SAITO KANAME ,  MATSUDA MORIHIRO

IPC: B62D6/02

Abstract: PURPOSE: To solve a problem on a shortage of assist power at the time of high speed turning or the like without entailing any damage to a desired steering feeling. CONSTITUTION: In a car power steering system that is designed so as to do a steering assist by the way of feeding a power cylinder 13 with assist hydraulic pressure via a control valve 12 operating in response to an extent of steering torque, it is provided with a variable throttle valve 20, which increases a passage area of a bypass passage P1 connecting both chambers 13a and 13b of the power cylinder in response to an increase in car speed, and then decreases the area of the bypass passage P1 in response to an increase in the assist hydraulic pressure successively in this bypass passage P1 .

公开(公告)号：JPH07303857A

公开(公告)日：1995-11-21

申请号：JP9996894

申请日：1994-05-13

Applicant: TOYOTA MOTOR CORP ,  TOYOTA CENTRAL RES & DEV ,  KANTO JIDOSHA KOGYO KK ,  KANSAI PAINT CO LTD

Inventor： HATTORI HIROSHI ,  SUZUKI TAKAAKI ,  WADA TAKASHI ,  MATSUDA MORIHIRO ,  ISHIGURO MASATO ,  SATA KENICHI

IPC: B05D5/06 ,  B05D7/14

Abstract: PURPOSE:To provide a single-layered coating film producing a feel of depth. CONSTITUTION:Mansell values (V) are adjusted to be 0-6, the area ratio or the area ratio and the particle size distribution range of bright pigment are specified, the area of the bright pigment in an area, which was divided in the order of area, is adjusted to be included from an average to a specified range. Or, the logarithmic values of the area ratios of the bright pigment contained in the respective divided areas are plotted on the ordinate, while the areas are plotted on the abscissa to make a graph. By adjusting the inclination of a regression line for points on the graph, a coating film producing a feeling of depth is obtained.

公开(公告)号：JPH06117934A

公开(公告)日：1994-04-28

申请号：JP26717292

申请日：1992-10-06

Applicant: TOYOTA MOTOR CORP ,  TOYOTA CENTRAL RES & DEV ,  KANSAI PAINT CO LTD ,  KANTO JIDOSHA KOGYO KK

Inventor： HATTORI HIROSHI ,  NAKAJIMA TAKEHIKO ,  ITO NOBUHIRO ,  MATSUDA MORIHIRO ,  TERADA SHIGEO ,  WADA TAKASHI ,  SATA KENICHI ,  SAWAMURA TAKAMITSU

IPC: G01J3/50 ,  G01N21/88

Abstract: PURPOSE:To establish a simple evaluation method having high correlation with functional evaluation by irradiating a coating with light from a light source, receiving the light from an angle other than regular reflection in order to measure the luminance on the surface, and then comparing an average luminance with a most frequent luminance. CONSTITUTION:A test plate 1 applied with a coating is set while inclining by an angle theta against a horizontal plane and then it is irradiated with light from a light source 2 in the normal direction. A TV camera 3 is arranged such that the optical axis of lens thereof is normal to the test plate 1 thus blocking reception of regularly reflected light. An image taken through the camera 3 is split into 512X480 pixels each of which is then converted into luminance level of 0-255 gradation and stored in a frame memory 4. The luminance data is processed through a computor 5 which determines an average luminance and most frequent luminance. Depth of coating is then evaluated based on comparison between the average luminance and most frequent luminance. The smaller the difference, the deeper the depth of coation, and vice versa.