公开(公告)号：JPH03193558A

公开(公告)日：1991-08-23

申请号：JP33158189

申请日：1989-12-21

Applicant: TOYOTA MOTOR CORP

Inventor： OHASHI KAORU ,  IWATA HITOSHI ,  TAKEDA OSAMU ,  INOUE HIDEO ,  TANAKA HIROAKI ,  KOIKE SHIN ,  SUGIYAMA MIZUHO ,  ISHIKAWA SUSUMU ,  KUSUNOKI HIDEKI

IPC: B62D6/00 ,  B62D7/14 ,  B62D101/00 ,  B62D111/00 ,  B62D113/00 ,  B62D117/00 ,  B62D137/00

Abstract: PURPOSE:To keep the running stability of a vehicle so favorably by installing a factor correcting means which corrects a factor so as to check its variation set by a factor decision means when a detected steering speed is largely varied in the decrement direction. CONSTITUTION:In this controller, there is provided with a factor correcting means 6 which corrects a factor so as to check its variation being set by a factor decision means 3 when a detected steering speed of a steering speed detecting means 2 is largely varied in the decrement direction. With this constitution, when each steering speed of front wheels FW is largely varied in the decrement direction, the factor correcting means 6 corrects it so as to check a variation in the factor being set by the factor decision means 3, so that a steered variable of each rear wheel RW in the same phase direction will not be lessened so suddenly. With this constitution, even if the steering speed is temporarily and suddenly decreased, the steered variable of the rear wheels RW in the same phase direction will not be suddenly decreased at all, and since steering control in the same phase direction at the safety side is maintained, the running stability of a vehicle is favorably kept up.

公开(公告)号：JPH0392478A

公开(公告)日：1991-04-17

申请号：JP22870689

申请日：1989-09-04

Applicant: TOYOTA MOTOR CORP

Inventor： INOUE HIDEO ,  TAKEDA OSAMU

IPC: B62D7/14 ,  B62D6/00 ,  B62D7/15 ,  B62D101/00 ,  B62D137/00

Abstract: PURPOSE:To maintain an adequate rear wheel steering amount and to improve the operation safety of the vehicle by using a fixed operation parameter not depending on the car speed as the operation parameter of the rear wheel steering control device when it is detected that the reliability of the car speed is reduced. CONSTITUTION:A car speed reliability detecting device 6 to detect that the reliability of the car speed detected by a car speed detecting device 4 is lowered, and an operation parameter converting device 7 to make a fixed operation parameter not depending on the car speed into an operation parameter in a rear wheel steering control device 1 instead of an operation parameter decided by an operation parameter deciding device 5 when it is detected that the reliability of the car speed is reduced by a detector 6, are provided. And when the reliability of the detected car speed is low, the steering is converted to a stable general control not dependent to the car speed, and the steering amount of the rear wheels determined depending on an inaccurate car speed is prevented. Consequently, the operation safety of the vehicle can be improved not by depending on the reliability of the detected car speed.

公开(公告)号：JPH02310159A

公开(公告)日：1990-12-25

申请号：JP13206589

申请日：1989-05-25

Applicant: NIPPON DENSO CO ,  TOYOTA MOTOR CORP

Inventor： KISHIMOTO MASASHI ,  INOUE HIDEO

IPC: B60T8/58 ,  B60T8/1761 ,  B60T8/70

Abstract: PURPOSE:To shorten the braking distance by judging the road surface condition on the basis of the wheel speed, changing the control slope when the brake pressure for the wheel increases in accordance with the result from this judgement, and controlling the brake pressure optimumly according to the road surface condition. CONSTITUTION:The brake pressure for a wheel M1 is adjusted by a control valve M2. The speed of this wheel M1 is sensed by a wheel speed sensor M3. The control valve M2 is controlled by a control means M4 so as to prevent lock of the wheel M1 on the basis of a signal given by this wheel speed sensor M3. In this device a road surface condition judging means M5 judges whether the road condition is bad on the basis of a signal given by the wheel speed sensor M3. According to the result from judgement made by this road surface condition judging means M5, a gradient change means M6 changes the control gradient when the brake pressure for the wheel M1 increases. Thereby the wheel speed is converged quickly to near the reference speed regardless of the road surface condition, and thereby the brake distance is shortened.

公开(公告)号：JPH02310156A

公开(公告)日：1990-12-25

申请号：JP12965389

申请日：1989-05-23

Applicant: NIPPON DENSO CO ,  TOYOTA MOTOR CORP

Inventor： FUKUSHIMA AKIRA ,  MAKINO NOBUHIKO ,  SAKAI KAZUNORI ,  INOUE HIDEO ,  UCHIDA KIYOYUKI

IPC: B60T8/1755 ,  B60T8/172 ,  B60T8/1763 ,  B60T8/1764 ,  B60T8/42 ,  B60T8/64 ,  B60T8/66

Abstract: PURPOSE:To enhance the braking performance and maneuvering stability at cornering by selecting either the reference speed based on the mean speed valve of the left and right rear wheels to the reference speed based on the speed max. value of the left and right rear wheels according to the road surface condition, and therewith controlling slip of wheel. CONSTITUTION:The speed of each wheel at the front left and right and the rear left and right of the wheel is sensed by respective means a-d. The road condition is judged by a means (e) on the basis of signals given by these means a-d. The reference speed is calculated by a means (f) on the basis of signals given by the means a-d. No.1 reference speed is calculated on the basis of the mean speed value of the left and right rear wheels, while No. 2 reference speed is calculated on the basis of the max. speed value of the left and rear wheels, and either of them is selected according to the result from judgement made by the means (e). With the selected reference speed, a means (g) controls the wheel so as to prevent slippage.

公开(公告)号：JPH02128952A

公开(公告)日：1990-05-17

申请号：JP28258688

申请日：1988-11-10

Applicant: TOYOTA MOTOR CORP ,  TOYOTA CENTRAL RES & DEV

Inventor： ITO TOSHIHIRO ,  INOUE HIDEO ,  UZUKI KANAME

IPC: B60T8/48

Abstract: PURPOSE:To prevent delay in effect opf a brake by interposing a control valve, which is equipped with two one-way valves with different pressure-receiving areas and opposite valve opening directions between a selector valve, which is installed on a liquid passage leading from a master cylinder to wheel cylinders, and the wheel cylinders. CONSTITUTION:A control valve 61 installed on a liquid passage between wheel cylinders and a selector valve 31 in selective communication of the wheel cylinders 21 to either of a master cyulinder and a reserver has a valve chest 66 with one end provided with an opening 64 leading to the wheel cylinders 21 and the other end having an opening 65 leading to the selector valve 31. This valve chest 66 is provided with valve bodies 82, 86 blocking valve holes 81, 85 formed in a bulkhead 67 in the opposite direction each other in the chest body 68 provided in the center with bulkhead 67 in a single piece, wherein the valve bodies 82, 86 are energized by springs 83, 87 in the direction of closing. In the condition that the valve body 86 is closed, the pressure receiving area of valve body 86 on its selector valve 31 side shall be greater than that on the wheel cylinder 21 side.

公开(公告)号：JPS62116343A

公开(公告)日：1987-05-27

申请号：JP25572185

申请日：1985-11-14

Applicant: Toyota Motor Corp

Inventor： INOUE HIDEO

IPC: B60T8/32 ,  B60T8/175 ,  B60T8/1761 ,  B60T8/1766 ,  B60T8/34 ,  B60T8/40 ,  B60T8/48 ,  B60T8/58 ,  B60T8/66 ,  B60T13/68

CPC classification number: B60T8/345 ,  B60T8/175 ,  B60T8/1766 ,  B60T13/686

Abstract: PURPOSE: To improve brake performance by providing first brakes for reducing the brake fluid pressure to such a level as to cause no skidding of wheels, when the wheel slip ratio is too large, and second brakes serving to keep the slip ratio in the correct range.
CONSTITUTION: There are provided, respectively, on the front and rear wheels 10, 11 first brakes 20, 22 operated by a fluid pressure from a master cylinder 24 which generates the fluid pressure corresponding to the depression force applied to a brake pedal 25 and second brakes 21, 23 operated by a fluid pressure from another system. There are provided electromagnetic control valves 30, 32 in respective fluid passages 27, 28 between the master cylinder 24 and the first brakes 20, 22. When the slip ratio estimated by a control circuit 70 from outputs of rotation sensors 90, 92 for detecting the rotational speeds of the respective wheels becomes too large, the electromagnetic control valves 30, 32 are changed over to reduce the brake fluid pressure and the brake forces of the second brakes 21, 23 are regulated and controlled so as to keep the slip ratio within the correct range.
COPYRIGHT: (C)1987,JPO&Japio

Abstract translation: 目的：为了提高制动器的性能，通过提供第一制动器将制动液压力降低至不会使车轮滑动的水平，当车轮滑移比过大时，第二制动器用于将滑差比保持在正确的范围内 。 构成：分别设置在前轮10和后轮11上，通过来自主缸24的流体压力操作的第一制动器20,22，其产生与施加到制动踏板25的第二压力相对应的流体压力 制动器21,23由来自另一系统的流体压力操作。 在主缸24和第一制动器20,22之间的相应流体通道27,28中设置有电磁控制阀30,32。当由控制电路70估计的滑移比与旋转传感器90,92的输出相关，用于检测 各个车轮的转速变得过大，电磁控制阀30,32被切换以减小制动液压力，并且对第二制动器21,23的制动力进行调节和控制，以将滑移率保持在 正确范围

公开(公告)号：JPH08104120A

公开(公告)日：1996-04-23

申请号：JP14360195

申请日：1995-06-09

Applicant: TOYOTA MOTOR CORP

Inventor： INOUE HIDEO ,  UEMAE HAJIME ,  MORITA MITSUHIKO ,  KOJIMA HIROYOSHI

IPC: B60G17/015 ,  B60G17/08

Abstract: PURPOSE: To restrain a shock against crew and production of abnormal sound at changeover of damping force without using any relative speed sensor by allowing changeover of damping force by a control means after the lapse of a fixed time since passing a fixed value near speed of zero. CONSTITUTION: Shock absorbers 10A-10D having stepping motors 15a-15d are provided between a vehicle body and right/left, front/rear wheels, and vertical acceleration sensors 21a-21d are provided on the body in the vicinity of the respective wheels. By means of an electric control device 20, the signals of the vertical acceleration sensors 21a-21d are input to a microcomputer 23 through band pass filters 22a-22d and together with the signal of a vehicle speed sensor 25, and the respective stepping motors 15a-15d are controlled to be driven through a driving circuit 24. The microcomputer 23 judges whether the vehicle speed is over a threshold value in the vicinity of zero or not, sets a control beginning time by adding a delay time to the time passing through it, and allows changeover of damping force after the lapse of the time. Therefore, shock against crew and production of abnormal sound following to changeover of damping force can be reduced without using any relative speed sensor.

公开(公告)号：JPH07117437A

公开(公告)日：1995-05-09

申请号：JP27083093

申请日：1993-10-28

Applicant: TOYOTA MOTOR CORP

Inventor： OGAWA KAZUO ,  INOUE HIDEO

IPC: B60G17/015 ,  F16F9/52

Abstract: PURPOSE:To prevent abnormal damping force control of a device which is capable of varying the damping force characteristic of a shock absorber by estimating the temperature of operating oil in the shock absorber without using a temperature sensor, and inhibiting damping force control when the oil is at low temperatures. CONSTITUTION:A damping force (f) when oil temperature is ideal is determined by a controller 60 in accordance with a relative velocity vS, which is the rate of change of the relative displacement deltaS of a shock absorber which is detected by a relative displacement sensor 82, and an ideal value of the sprung acceleration alpha is determined in accordance with the ideal damping force (f) and the relative displacement deltaS, and when the actual value of the sprung acceleration alphawhich is detected by an sprung acceleration sensor 80 is higher than value the oil temperature is determined to be low. At low oil temperatures, damping force control is inhibited, thus preventing a step motor 40 from stepping out as a result of increase in the viscosity of operating oil.

公开(公告)号：JPH04212013A

公开(公告)日：1992-08-03

申请号：JP99991

申请日：1991-01-09

Applicant: NIPPON SOKEN ,  TOYOTA MOTOR CORP

Inventor： FUKUI SHINJI ,  IDOGAKI KOJI ,  ISHIHARA TOSHIHISA ,  SHIMOMURA YUTAKA ,  IWASAKI TAKASHI ,  KUSUNOKI HIDEKI ,  INOUE HIDEO

IPC: G01C19/12 ,  G01C19/02 ,  G01C19/20 ,  G01C19/42 ,  G01C19/44

Abstract: PURPOSE:To detect angular velocity accurately by rotating a magnet as a rotating body without contact. CONSTITUTION:An inner case 724 is provided inside an outer case 708, while a magnet 3 is provided rotatably inside the inner case 724. When angular velocity occurs, the magnet 3 and the inner case 724 tilt with respect to the outer case 708 by a rotating ring 718 to an angle where precession torque and spring force of magnetic fluid 2 are balanced. Hall elements 41, 42 detect the inclination of the magnet to have the angular velocity calculated.

公开(公告)号：JPH03193559A

公开(公告)日：1991-08-23

申请号：JP33158289

申请日：1989-12-21

Applicant: TOYOTA MOTOR CORP

Inventor： KUSUNOKI HIDEKI ,  TAKEDA OSAMU ,  INOUE HIDEO ,  TANAKA HIROAKI ,  KOIKE SHIN ,  SUGIYAMA MIZUHO ,  OHASHI KAORU ,  IWATA HITOSHI ,  ISHIKAWA SUSUMU

IPC: G01P21/00 ,  B62D6/00 ,  B62D101/00 ,  B62D111/00 ,  B62D113/00 ,  B62D137/00

Abstract: PURPOSE:To detect a malfunction of yaw rate sensor output with a simple constitution by constituting a yaw rate detecting value or a working value so as to judge whether it is within the specified range depending on the basis of a detected front-wheel steering angle or not. CONSTITUTION:A steering angle is detected by a front-wheel steering angle sensor 61, and thereby whether the yaw rate detecting value of a yaw rate sensor 63 or the working value is within the specified range dependent on the basis of a detected front wheel steering angle or not is judged by an electric controller C. Incidentally, a yaw rate acting on a car body is a physical quantity closely rated to steering of a vehicle, while a steering wheel 14 is maintained in the state that a turning angle is large to some extent, and when the vehicle is in turning motion at a small turning radius, the yaw rate shows a large value, and a variation in this yaw rate grows larger when the steering wheel 14 is quickly turned and the vehicle is suddenly steered. Consequently, such a yaw rate that may be really produced in the car body is compared with the detected yaw rate, through which something wrong in the output of the yaw rate sensor 63 is judged.