公开(公告)号：US5162995A

公开(公告)日：1992-11-10

申请号：US505365

申请日：1990-04-06

Applicant: Hiroyuki Ikemoto ,  Shuuichi Buma ,  Toshio Aburaya ,  Takashi Yonekawa ,  Toshio Onuma ,  Tsukasa Watanabe ,  Toshiaki Hamada

Inventor： Hiroyuki Ikemoto ,  Shuuichi Buma ,  Toshio Aburaya ,  Takashi Yonekawa ,  Toshio Onuma ,  Tsukasa Watanabe ,  Toshiaki Hamada

IPC: B60G17/015 ,  B60G17/016

CPC classification number: B60G17/016 ,  B60G2400/104 ,  B60G2400/106 ,  B60G2400/204 ,  B60G2400/252 ,  B60G2400/30 ,  B60G2400/38 ,  B60G2400/41 ,  B60G2400/50 ,  B60G2400/73 ,  B60G2600/02 ,  B60G2600/26 ,  B60G2600/60 ,  B60G2800/012 ,  B60G2800/014

Abstract: In a hydraulic active suspension system, a plurality of actuators having working fluid chambers are provided corresponding to the vehicle wheels. Each actuator is adapted to increase and decrease vehicle height in response to the pressure within its working chamber, which is controlled by a pressure control device. Vehicle speed and vehicle heights at the locations corresponding to the vehicle wheels are detected by corresponding sensors. A control device is further provided for controlling the pressure control device so that the pressures within the working fluid chambers are driven to substantially the desired pressures, the desired pressures determined by, at least, the sum of the first control parameters corresponding to the differences between the actual vehicle heights detected and the associated desired vehicle heights and the second control parameters corresponding to the changing amounts of the vehicle height differences. The second control parameters are so set that the higher the vehicle speed is, the higher the second quantities are in magnitude, enhancing the controllability and stability of the vehicle under higher vehicle speed conditions and ensuring a greater comfortability level of the vehicle under lower vehicle speed conditions.

公开(公告)号：US5043893A

公开(公告)日：1991-08-27

申请号：US459188

申请日：1989-12-29

Applicant: Toshio Aburaya ,  Shuuichi Buma ,  Takashi Yonekawa ,  Kunihito Sato ,  Masaki Kawanishi ,  Toshio Onuma ,  Hiroyuki Ikemoto ,  Kaoru Ohashi ,  Toshiaki Hamada ,  Takami Sugiyama

Inventor： Toshio Aburaya ,  Shuuichi Buma ,  Takashi Yonekawa ,  Kunihito Sato ,  Masaki Kawanishi ,  Toshio Onuma ,  Hiroyuki Ikemoto ,  Kaoru Ohashi ,  Toshiaki Hamada ,  Takami Sugiyama

IPC: B60G17/016 ,  B60G17/017

CPC classification number: B60G17/017 ,  B60G17/016 ,  B60G2202/15 ,  B60G2204/80 ,  B60G2400/104 ,  B60G2400/106 ,  B60G2400/20 ,  B60G2400/204 ,  B60G2400/252 ,  B60G2400/30 ,  B60G2400/38 ,  B60G2400/41 ,  B60G2400/50 ,  B60G2400/51 ,  B60G2400/73 ,  B60G2500/10 ,  B60G2500/20 ,  B60G2500/30 ,  B60G2600/04 ,  B60G2600/08 ,  B60G2600/12 ,  B60G2600/14 ,  B60G2600/16 ,  B60G2600/20 ,  B60G2600/602 ,  B60G2600/68 ,  B60G2600/70 ,  B60G2800/012 ,  B60G2800/014 ,  B60G2800/22 ,  B60G2800/244 ,  B60G2800/246

Abstract: In a hydraulic active suspension system, a plurality of actuators having working fluid chambers are provided corresponding to vehicle wheels. Each actuator is adapted to increase and decrease vehicle height as the results of the supply and the discharge of working fluid to and from its working fluid chamber, respectively. Supplying and discharging devices supply working fluid to and discharge from the working fluid chamber. Vehicle height sensors detect the vehicle heights at the locations corresponding to the vehicle wheels. A control device is further provided. The control device controls the supplying and discharging devices so that the pressure within the working fluid chamber in each actuator may be a value corresponding to the sum of a basic pressure determined according to the running conditions of the vehicle and a compensating pressure determined based upon the integral value of the difference between a standard vehicle height and an actual vehicle height. When the integral value of the difference is larger in magnitude than a predeterminate value, it is reduced in magnitude by the control device so as to prevent the control with the compensating pressure from overriding the control with the basic pressure.

Abstract translation: 在液压主动悬挂系统中，对应于车轮设置有具有工作流体室的多个致动器。 每个致动器适于随着工作流体向工作流体室的供给和排出的结果分别增加和减少车辆高度。 供应和排放装置向工作流体室供应工作流体并从工作流体室排出。 车辆高度传感器在对应于车轮的位置处检测车辆高度。 还提供一种控制装置。 控制装置控制供给和排出装置，使得每个致动器中的工作流体室内的压力可以是对应于根据车辆的运行状况确定的基本压力与基于车辆的行驶状态确定的补偿压力之和的值 标准车辆高度与实际车辆高度之差的积分值。 当差值的积分值大于预定值时，其通过控制装置的幅度减小，以防止补偿压力的控制超过基本压力的控制。

公开(公告)号：US5104143A

公开(公告)日：1992-04-14

申请号：US586202

申请日：1990-09-21

Applicant: Takashi Yonekawa

Inventor： Takashi Yonekawa

IPC: B60G17/016

CPC classification number: B60G17/0163 ,  B60G2202/12 ,  B60G2202/154 ,  B60G2400/104 ,  B60G2400/106 ,  B60G2400/204 ,  B60G2400/252 ,  B60G2400/30 ,  B60G2400/38 ,  B60G2400/40 ,  B60G2400/41 ,  B60G2400/51 ,  B60G2400/5122 ,  B60G2400/71 ,  B60G2500/10 ,  B60G2500/40 ,  B60G2600/02 ,  B60G2600/14 ,  B60G2600/16 ,  B60G2600/26 ,  B60G2600/70 ,  B60G2600/76 ,  B60G2800/012 ,  B60G2800/18 ,  B60G2800/22 ,  B60G2800/24 ,  B60G2800/244

Abstract: In a vehicle suspension system, the fluid pressure type actuators provided between a vehicle body and wheels are so controlled that a ratio of the load to be born by the front wheels to the load to be born by the rear wheels determined based upon the rate of change of lateral acceleration is modified to be increased along with increase of vehicle speed, and in case of the four wheel steering, the roll stiffness in the rear wheels is decreased along with increase of vehicle speed, both for the purpose of improving the stability in steering at high vehicle speed while ensuring the high steerability at low vehicle speed. The roll stiffness in the rear wheels may also be modified to be higher in a transitional state than in a constant state in a turning.

公开(公告)号：US5078421A

公开(公告)日：1992-01-07

申请号：US573706

申请日：1990-08-28

Applicant: Kouichi Kokubo ,  Yutaka Iguchi ,  Toshio Aburaya ,  Masaki Kawanishi ,  Kunihito Sato ,  Takashi Yonekawa ,  Shuuichi Buma

Inventor： Kouichi Kokubo ,  Yutaka Iguchi ,  Toshio Aburaya ,  Masaki Kawanishi ,  Kunihito Sato ,  Takashi Yonekawa ,  Shuuichi Buma

IPC: B60G17/015 ,  B60G17/00 ,  B60G17/0185 ,  G01M17/04

CPC classification number: B60G17/0185 ,  B60G2202/24 ,  B60G2400/104 ,  B60G2400/106 ,  B60G2400/204 ,  B60G2400/25 ,  B60G2400/252 ,  B60G2400/30 ,  B60G2400/33 ,  B60G2400/41 ,  B60G2400/5182 ,  B60G2500/30 ,  B60G2600/04 ,  B60G2600/08 ,  B60G2600/12 ,  B60G2600/14 ,  B60G2600/16 ,  B60G2600/20 ,  B60G2600/604 ,  B60G2600/70 ,  B60G2600/76 ,  B60G2600/82 ,  B60G2800/012 ,  B60G2800/014

Abstract: A suspension pressure control system on a vehicle applies a pressure which is proportional to a current level supplied to a solenoid of a pressure control valve to a shock absorber associated with respective one of suspensions from the valve. An electronic controller controls the current level to maintain an attitude of a vehicle substantially constant in spite of any change of longitudinal and lateral acceleration, which are detected by acceleration sensors. If a driver on the vehicle closes test indication switches TSW1 and TSW2, indicates "high" by a height indication switch HSW and rotates a steering wheel on the vehicle by B toward right, the vehicle laterally inclines such that a height of the left side of the vehicle rises up and a right side falls down responding to the rotation of the steering wheel. The inclination increases as the rotation of the steering wheel increases. The inclination decreases when the steering wheel rotates inverse direction toward the neutral position. When the steering wheel rotates beyond the neutral position toward left, the vehicle laterally inclines such that the height of the left side of the vehicle calls down and the right side rises up responding to the rotation of the steering wheel.

公开(公告)号：US4973080A

公开(公告)日：1990-11-27

申请号：US444761

申请日：1989-12-01

Applicant: Hiroyuki Ikemoto ,  Shuuichi Buma ,  Kaoru Ohashi ,  Toshio Aburaya ,  Takashi Yonekawa ,  Toshio Oonuma ,  Kunihito Sato ,  Masaki Kawanishi ,  Toshiaki Hamada ,  Kouichi Kokubo ,  Shinichi Tagawa

Inventor： Hiroyuki Ikemoto ,  Shuuichi Buma ,  Kaoru Ohashi ,  Toshio Aburaya ,  Takashi Yonekawa ,  Toshio Oonuma ,  Kunihito Sato ,  Masaki Kawanishi ,  Toshiaki Hamada ,  Kouichi Kokubo ,  Shinichi Tagawa

IPC: B60G17/017

CPC classification number: B60G17/017 ,  B60G2202/15 ,  B60G2204/80 ,  B60G2400/104 ,  B60G2400/106 ,  B60G2400/204 ,  B60G2400/252 ,  B60G2400/30 ,  B60G2400/38 ,  B60G2400/41 ,  B60G2400/50 ,  B60G2400/51 ,  B60G2400/73 ,  B60G2400/90 ,  B60G2500/30 ,  B60G2600/02 ,  B60G2600/04 ,  B60G2600/08 ,  B60G2600/20 ,  B60G2600/26 ,  B60G2600/60 ,  B60G2600/70 ,  B60G2600/85 ,  B60G2800/012 ,  B60G2800/014

Abstract: In a hydraulic suspension system, a plurality of actuators having working fluid chambers are provided. Each actuator is adapted to increase and decrease vehicle height as the results of the supply and the discharge of working fluid to and from its working fluid chamber, respectively. Working fluid supply passages supply working fluid at supply pressure to the working fluid chambers and working fluid discharge passages discharge working fluid from the working fluid chambers. Cut-off valves and pressure control devices are provided in the supply passages and the discharge passages. Each cut-off valve is adapted to remain in its closed position whenever the supply pressure is not more than a predetermined value. Each pressure control device is adapted to control the supply of the working fluid to and the discharge from the associated working fluid chamber to adjust the pressure within the chamber. The system further comprises devices for detecting the pressures within the working fluid chambers and a device for determining the supply pressure. The pressure control devices are controlled so that their controlling pressures may substantially be equal to the pressures within the associated working fluid chambers determined by the pressure determining devices at least until the cut-off valves are opened.

公开(公告)号：US4897776A

公开(公告)日：1990-01-30

申请号：US240134

申请日：1988-09-02

Applicant: Shingo Urababa ,  Shuuichi Buma ,  Toshio Aburaya ,  Takashi Yonekawa ,  Osamu Takeda ,  Shunichi Doi

Inventor： Shingo Urababa ,  Shuuichi Buma ,  Toshio Aburaya ,  Takashi Yonekawa ,  Osamu Takeda ,  Shunichi Doi

IPC: B60G17/016

CPC classification number: B60G17/016 ,  B60G2500/2014

Abstract: In controlling roll and pitch of a vehicle body responsive to a displacement signal produced at each wheel of the vehicle, each signal is low-pass-filtered with a certain threshold frequency to prevent hunting of the control due to an excessively high frequency component (such as noise or a component corresponding to road irregularities) of the signal. According to this invention, the threshold frequency is changed to a higher value in order to get quick attitude control when the roll or pitch of the body is expected, while it is set at a lower value when no such attitude change is expected in order to prevent hunting of the control.

公开(公告)号：US06729697B2

公开(公告)日：2004-05-04

申请号：US09824835

申请日：2001-04-04

Applicant: Yoshiyuki Yasui ,  Takashi Yonekawa ,  Akira Tanaka ,  Hideyuki Suzuki ,  Mamoru Sawada

Inventor： Yoshiyuki Yasui ,  Takashi Yonekawa ,  Akira Tanaka ,  Hideyuki Suzuki ,  Mamoru Sawada

IPC: B60T860

CPC classification number: B60T8/172 ,  B60T8/3275 ,  B60T2201/03

Abstract: A braking force control device, wherein wheel speed is detected and a slope of a braking force with respect to slip speed of the wheel is estimated on the basis of the detected wheel speed, a braking operation by which a brake pedal is depressed is detected and, on the basis of the detected braking operation conditions and estimated slope of the braking force, braking of the braking device to brake the wheels by a braking force generated in response to the braking operation by which the brake pedal is depressed is assisted.

Abstract translation: 一种制动力控制装置，其中，根据所检测到的车轮速度，基于检测到制动踏板被踩下的制动操作来估计检测到车轮速度并且相对于车轮的滑动速度的制动力的斜率， 根据检测到的制动操作条件和制动力的估计斜率，辅助制动装置制动以通过制动踏板产生的制动力来制动车轮。

公开(公告)号：US5071158A

公开(公告)日：1991-12-10

申请号：US568161

申请日：1990-08-16

Applicant: Takashi Yonekawa ,  Shuuichi Buma ,  Toshio Aburaya ,  Kunihito Sato ,  Masaki Kawanishi ,  Kouichi Kokubo ,  Takami Sugiyama ,  Toshiaki Hamada

Inventor： Takashi Yonekawa ,  Shuuichi Buma ,  Toshio Aburaya ,  Kunihito Sato ,  Masaki Kawanishi ,  Kouichi Kokubo ,  Takami Sugiyama ,  Toshiaki Hamada

IPC: B60G17/016

CPC classification number: B60G17/016 ,  B60G2202/154 ,  B60G2202/42 ,  B60G2204/80 ,  B60G2400/104 ,  B60G2400/106 ,  B60G2400/204 ,  B60G2400/252 ,  B60G2400/30 ,  B60G2400/33 ,  B60G2400/38 ,  B60G2400/41 ,  B60G2400/51 ,  B60G2400/71 ,  B60G2500/30 ,  B60G2600/02 ,  B60G2600/04 ,  B60G2600/14 ,  B60G2600/16 ,  B60G2600/26 ,  B60G2600/70 ,  B60G2600/74 ,  B60G2600/76 ,  B60G2800/012 ,  B60G2800/014 ,  B60G2800/019 ,  B60G2800/16 ,  B60G2800/18 ,  B60G2800/20 ,  B60G2800/22 ,  B60G2800/24

Abstract: In a fluid pressure type active suspension in a vehicle such as an automobile in which a fluid pressure type actuator supporting a vehicle body from a wheel so as to be able to vary a vehicle height of the vehicle body relative to the wheel in accordance with a fluid pressure supplied in its fluid chamber is operated by a pressure control means which controls the fluid pressure supplied in the fluid chamber of the actuator according to certain control parameters including at least a rate of change of the vehicle height or an acceleration of the vehicle body, the control means is adapted to modify an actual value of the rate of change of the vehicle height or the acceleration of the vehicle body for use in the control of the fluid pressure to be less than the actual value thereof when the rate of change of the vehicle height or the acceleration of the vehicle body is greater than a threshold value therefor.

公开(公告)号：US5042834A

公开(公告)日：1991-08-27

申请号：US565962

申请日：1990-08-13

Applicant: Takashi Yonekawa ,  Shuuichi Buma ,  Toshio Aburaya ,  Kunihito Sato ,  Masaki Kawanishi ,  Kouichi Kokubo ,  Yutaka Iguchi

Inventor： Takashi Yonekawa ,  Shuuichi Buma ,  Toshio Aburaya ,  Kunihito Sato ,  Masaki Kawanishi ,  Kouichi Kokubo ,  Yutaka Iguchi

IPC: B60G17/015 ,  B60G17/016 ,  B60G17/056

CPC classification number: B60G17/016 ,  B60G2202/154 ,  B60G2202/42 ,  B60G2400/104 ,  B60G2400/106 ,  B60G2400/204 ,  B60G2400/252 ,  B60G2400/30 ,  B60G2400/38 ,  B60G2400/41 ,  B60G2400/51 ,  B60G2400/71 ,  B60G2500/30 ,  B60G2600/02 ,  B60G2600/04 ,  B60G2600/14 ,  B60G2600/16 ,  B60G2600/26 ,  B60G2600/28 ,  B60G2600/70 ,  B60G2600/74 ,  B60G2600/76 ,  B60G2800/012 ,  B60G2800/16 ,  B60G2800/24

Abstract: In a fluid pressure type active suspension in a vehicle such as an automobile, having a fluid pressure type actuator supporting a vehicle body from a wheel so as to be able to vary a height of the vehicle body relative to the wheel in accordance with a fluid pressure supplied to its fluid chamber, a fluid supply passage for supplying a working fluid to the fluid chamber of the actuator, a fluid exhaust passage for exhausting the working fluid from the fluid chamber of the actuator, and a pressure control circuit including a switching-over valve traversing the fluid supply passage and the fluid exhaust passage so as to be operated by a pilot pressure to selectively connect the fluid chamber of the actuator with either the fluid supply passage or the fluid exhaust passage for controlling the fluid pressure supplied to the fluid chamber of the actuator, a variable throttle valve for generating the pilot pressure for operating the switching-over valve from the pressure of the working fluid in the fluid supply passage by releasing a part of the working fluid therefrom, and a throttle control device for controlling the variable throttle valve so as to control the pilot pressure to a target value, the pressure control circuit comprises a means for modifying the target value to be lowered when the difference between the pressure of fluid in the fluid supply passage means at an upstream side of the pressure control circuit and the target value is smaller than a certain threshold value.

公开(公告)号：US5024459A

公开(公告)日：1991-06-18

申请号：US457957

申请日：1989-12-27

Applicant: Kouichi Kokubo ,  Toshiaki Hamada ,  Shinichi Tagawa ,  Nobuyasu Suzumura ,  Shuuichi Buma ,  Toshio Aburaya ,  Toshio Onuma ,  Kunihito Sato ,  Takashi Yonekawa ,  Masaki Kawanishi ,  Hiroyuki Ikemoto ,  Kaoru Ohashi

Inventor： Kouichi Kokubo ,  Toshiaki Hamada ,  Shinichi Tagawa ,  Nobuyasu Suzumura ,  Shuuichi Buma ,  Toshio Aburaya ,  Toshio Onuma ,  Kunihito Sato ,  Takashi Yonekawa ,  Masaki Kawanishi ,  Hiroyuki Ikemoto ,  Kaoru Ohashi

IPC: B60G17/016 ,  B60G17/017

CPC classification number: B60G17/017 ,  B60G17/016 ,  B60G2202/15 ,  B60G2204/80 ,  B60G2400/104 ,  B60G2400/106 ,  B60G2400/20 ,  B60G2400/204 ,  B60G2400/252 ,  B60G2400/30 ,  B60G2400/38 ,  B60G2400/41 ,  B60G2400/50 ,  B60G2400/51 ,  B60G2400/73 ,  B60G2500/10 ,  B60G2500/20 ,  B60G2500/30 ,  B60G2600/04 ,  B60G2600/08 ,  B60G2600/12 ,  B60G2600/14 ,  B60G2600/16 ,  B60G2600/20 ,  B60G2600/602 ,  B60G2600/68 ,  B60G2600/70 ,  B60G2800/012 ,  B60G2800/014 ,  B60G2800/22 ,  B60G2800/244 ,  B60G2800/246

Abstract: A suspension pressure control system applies a pressure which is proportional to a current level supplied to a solenoid of a pressure control valve to a shock absorber associated with a suspension from the valve. When a pressure in a high pressure line which feeds a high pressure to the pressure control valve falls (rises), the pressure applied to the suspension is decreased (increased). Accordingly, the pressure in the high pressure line is detected by a sensor, and if it is low (high), the current level of the pressure control valve is corrected to a high value (low value). In order to prevent an abnormal pressure rise in the suspension which may be caused by an excessive pressure rise in the high pressure line during an idling operation of an engine, a correction which responds to the pressure of the high pressure line is chosen large when a vehicle speed is equal to zero or very low. In order to prevent an abnormality from occurring in the correction of the pressure which is attributable to an errorneous detected value during a failure of operation of sensor, such detected value is determined to be faulty, and in the event a fault occurred, the correction is modified to a given volume (0) which is allocated to a standard pressure in the high pressure line.