公开(公告)号：US5013955A

公开(公告)日：1991-05-07

申请号：US535194

申请日：1990-06-07

申请人： Yoshimichi Hara ,  Eiju Matsunaga ,  Hiroyuki Kawata ,  Akira Hukami ,  Yutaka Suzuki ,  Makoto Shiozaki ,  Yuji Yokoya ,  Yasuhiro Tsutsumi

发明人： Yoshimichi Hara ,  Eiju Matsunaga ,  Hiroyuki Kawata ,  Akira Hukami ,  Yutaka Suzuki ,  Makoto Shiozaki ,  Yuji Yokoya ,  Yasuhiro Tsutsumi

IPC分类号： B60G17/015 ,  B60G17/0185 ,  B60G17/019 ,  F02D41/20 ,  H01L41/04

CPC分类号： H01L41/042 ,  B60G17/0185 ,  B60G17/01941 ,  B60G2202/24 ,  B60G2202/422 ,  B60G2400/106 ,  B60G2400/204 ,  B60G2400/304 ,  B60G2400/41 ,  B60G2400/518 ,  B60G2401/10 ,  B60G2401/14 ,  B60G2500/10 ,  B60G2600/02 ,  B60G2600/04 ,  B60G2600/044 ,  B60G2600/07 ,  B60G2600/08 ,  B60G2600/60 ,  B60G2600/602 ,  B60G2600/70 ,  F02D41/2096

摘要： A drive system of a piezo-type actuator for use in a motor vehicle, which piezo-type actuator is constructed with a piezoelectric device which is expandable and contractible in accordance with application of a voltage thereto. The drive system includes a voltage-increasing section for increasing an output voltage of a power source mounted on the motor vehicle so as to develop a drive voltage for the piezo-type actuator and a voltage-application section for applying to the piezoelectric device of the piezo-type actuator the drive voltage. Also included in the drive system is an abnormality detection section which is arranged so as to an abnormality of the drive voltage developed by the voltage-increasing section. A safety controller is responsive to an abnormality signal from the abnormality detection section for prohibiting the application of the drive voltage to the piezoelectric device thereof and further discharging charges accumulated in the piezoelectric device thereof when the abnormality detection section detects the abnormality of the developed drive voltage. With this arrangement, it is possible to prevent troubles due to the abnormality of the drive voltage to be applied to the piezoelectric device of the piezo-type actuator.

公开(公告)号：US5243525A

公开(公告)日：1993-09-07

申请号：US580387

申请日：1990-09-11

申请人： Yasuhiro Tsutsumi ,  Yuji Yokoya ,  Yoshimichi Hara ,  Eiju Matsunaga ,  Hiroyuki Kawata ,  Akira Fukami ,  Yutaka Suzuki

发明人： Yasuhiro Tsutsumi ,  Yuji Yokoya ,  Yoshimichi Hara ,  Eiju Matsunaga ,  Hiroyuki Kawata ,  Akira Fukami ,  Yutaka Suzuki

IPC分类号： B60G17/015 ,  B60G17/019

CPC分类号： B60G17/01941 ,  B60G2202/24 ,  B60G2204/80 ,  B60G2400/204 ,  B60G2400/206 ,  B60G2400/302 ,  B60G2400/33 ,  B60G2400/41 ,  B60G2400/518 ,  B60G2400/60 ,  B60G2400/82 ,  B60G2400/91 ,  B60G2401/10 ,  B60G2500/10 ,  B60G2600/04 ,  B60G2600/70 ,  B60G2600/74 ,  B60G2600/76 ,  B60G2800/012 ,  B60G2800/014 ,  B60G2800/16 ,  B60G2800/22

摘要： A suspension control system for controlling a suspension having a shock absorber provided for each wheel of a vehicle includes a damping force change rate detector which detects a damping force change rate indicating a rate of change of a damping force of the shock absorber, and a damping force controller which alters the setting of the damping force on the basis of a relationship between the damping force change rate and an adjustment reference value. The system also includes a road surface condition detector which detects a condition of a road surface on which the vehicle is running on the basis of a change of the damping force of the shock absorber. Further, the system includes a damping force adjustment correcting unit which corrects the adjustment reference value by learning the adjustment reference value on the basis of a parameter related to the damping force of the shock absorber which reflects the condition of the road surface.

公开(公告)号：US5175687A

公开(公告)日：1992-12-29

申请号：US580388

申请日：1990-09-11

申请人： Yasuhiro Tsutsumi ,  Yuji Yokoya ,  Yoshimichi Hara ,  Eiju Matsunaga ,  Hiroyuki Kawata ,  Akira Fukami ,  Yutaka Suzuki

发明人： Yasuhiro Tsutsumi ,  Yuji Yokoya ,  Yoshimichi Hara ,  Eiju Matsunaga ,  Hiroyuki Kawata ,  Akira Fukami ,  Yutaka Suzuki

IPC分类号： B60G17/015 ,  B60G17/019

CPC分类号： B60G17/01941 ,  B60G2202/24 ,  B60G2202/42 ,  B60G2400/204 ,  B60G2400/206 ,  B60G2400/302 ,  B60G2400/33 ,  B60G2400/41 ,  B60G2400/518 ,  B60G2400/60 ,  B60G2400/82 ,  B60G2400/91 ,  B60G2401/10 ,  B60G2500/102 ,  B60G2500/104 ,  B60G2600/602 ,  B60G2600/604 ,  B60G2600/70 ,  B60G2600/74 ,  B60G2600/76 ,  B60G2800/16

摘要： A suspension control system for controlling a suspension having a shock absorber provided for a wheel of a vehicle includes a damping force detector which generates a damping force detection signal which indicates a change of a damping force of the shock absorber based on a condition of a road surface on which the vehicle is running. The system also includes a sprung resonance component extraction unit which extracts a sprung resonance component signal from the damping force detection signal. The sprung resonance component signal includes components having frequencies around a sprung resonance frequency of the shock absorber. Further, the system includes a determining part which determines whether or not the sprung resonance component signal exceeds a first level range provided for detecting a sign of the occurrence of a long-term vehicle vibration and which outputs a determination result. Moreover, the system includes a damping force controller which controls the shock absorber so that when the determining part determines that the sprung resonance component signal exceeds the first level range, the damping force of the shock absorber is altered to and maintained at an increased level and thus the suspension is maintained at a state which corresponds to the increased level and which is harder than before.

公开(公告)号：US5142477A

公开(公告)日：1992-08-25

申请号：US602696

申请日：1990-10-24

申请人： Yasuhiro Tsutsumi ,  Yuji Yokoya ,  Yoshimichi Hara ,  Eiju Matsunaga ,  Hiroyuki Kawata ,  Akira Fukami ,  Yutaka Suzuki

发明人： Yasuhiro Tsutsumi ,  Yuji Yokoya ,  Yoshimichi Hara ,  Eiju Matsunaga ,  Hiroyuki Kawata ,  Akira Fukami ,  Yutaka Suzuki

IPC分类号： B60G17/015 ,  B60G17/0165 ,  B60G17/019

CPC分类号： B60G17/0165 ,  B60G17/01941 ,  B60G2202/24 ,  B60G2400/102 ,  B60G2400/106 ,  B60G2400/204 ,  B60G2400/302 ,  B60G2400/34 ,  B60G2400/41 ,  B60G2400/518 ,  B60G2401/10 ,  B60G2500/102 ,  B60G2600/60 ,  B60G2600/70 ,  B60G2600/90

摘要： A suspension control system for controlling a suspension having a shock absorber provided for a wheel of a vehicle includes a damping force change rate detector which detects a damping force change rate indicating a rate of change of a damping force of the shock absorber, and a damping force controller which alters the setting of the damping force on the basis of the relationship between the damping force change rate and an adjustment reference value. The system also includes a road surface condition detector which detects, for every first period, the condition of a road surface on which the vehicle is running on the basis of a change of the damping force of the shock absorber, and a damping force adjustment correcting unit which corrects the adjustment reference value by learning, for every second period, the adjustment reference value on the basis of a parameter related to the damping force of the shock absorber which reflects the condition of the road surface. Further, the system includes a period adjustment unit which adjusts the first period on the basis of a vehicle speed.

公开(公告)号：US5069476A

公开(公告)日：1991-12-03

申请号：US520185

申请日：1990-05-08

申请人： Yasuhiro Tsutsumi ,  Yuji Yokoya ,  Yoshimichi Hara ,  Eiju Matsunaga ,  Hiroyuki Kawata ,  Akira Fukami ,  Yutaka Suzuki

发明人： Yasuhiro Tsutsumi ,  Yuji Yokoya ,  Yoshimichi Hara ,  Eiju Matsunaga ,  Hiroyuki Kawata ,  Akira Fukami ,  Yutaka Suzuki

IPC分类号： B60G17/015 ,  B60G17/019

CPC分类号： B60G17/01941 ,  B60G2400/204 ,  B60G2400/302 ,  B60G2400/33 ,  B60G2400/40 ,  B60G2400/50 ,  B60G2400/60 ,  B60G2401/10 ,  B60G2500/102 ,  B60G2600/02 ,  B60G2800/012 ,  B60G2800/014 ,  B60G2800/18 ,  B60G2800/22

摘要： A suspension control system controls suspensions provided for wheels of a vehicle includes a driving condition detecting part for detecting a driving condition of the vehicle, and a determination part for determining whether or not the driving condition detected by the driving condition detecting part coincides with a predetermined driving condition. The suspensions are grouped into a plurality of groups. Also the system includes a control part for separately controlling the suspensions on the basis of the driving condition when the determination part determines that the driving condition does not coincide with the predetermined driving condition and for controlling the suspensions for each of the groups so that the suspensions in an identical group are set to an identical condition when the determination part determines that the driving condition coincides with the predetermined driving condition.

公开(公告)号：US5134566A

公开(公告)日：1992-07-28

申请号：US656726

申请日：1991-02-19

申请人： Yuji Yokoya ,  Yasuhiro Tsutsumi ,  Yutaka Suzuki ,  Yoshimichi Hara ,  Akira Fukami

发明人： Yuji Yokoya ,  Yasuhiro Tsutsumi ,  Yutaka Suzuki ,  Yoshimichi Hara ,  Akira Fukami

IPC分类号： B60G17/015 ,  B60G17/019 ,  F16F9/50

CPC分类号： B60G17/015 ,  B60G17/01941 ,  B60G2202/42 ,  B60G2204/80 ,  B60G2400/202 ,  B60G2400/204 ,  B60G2400/60 ,  B60G2400/82 ,  B60G2401/10 ,  B60G2401/172 ,  B60G2500/10 ,  B60G2600/602 ,  B60G2600/604 ,  B60G2600/70 ,  B60G2600/74 ,  B60G2600/76

摘要： A shock absorber control system having shock absorbers provided respectively between wheels of a vehicle and a body thereof includes road surface condition detecting units provided for the respective shock absorbers, and damping force characteristic alteration units provided for the respective shock absorbers. The shock absorber control system also includes a correction unit for separately generating signals indicative of detection characteristics of the road surface condition detecting units provided for the respective shock absorbers on the basis of road surface condition detection signals generated by the road surface condition detecting units and for separately correcting either reference values used for determining whether or not the road surface is rough by the damping force characteristic alteration units or the road surface condition detection signals on the basis of the detection characteristics of the road surface condition detecting units provided for the respective shock absorbers.

公开(公告)号：US5090728A

公开(公告)日：1992-02-25

申请号：US654102

申请日：1991-02-12

申请人： Yuji Yokoya ,  Yasuhiro Tsutsumi ,  Yutaka Suzuki ,  Makoto Shiozaki ,  Nobuyoshi Onogi ,  Kazuo Takasou

发明人： Yuji Yokoya ,  Yasuhiro Tsutsumi ,  Yutaka Suzuki ,  Makoto Shiozaki ,  Nobuyoshi Onogi ,  Kazuo Takasou

IPC分类号： B60G17/015 ,  B60G17/019 ,  B60G17/08 ,  F16F9/50

CPC分类号： B60G17/015 ,  B60G17/01941 ,  B60G2202/42 ,  B60G2400/10 ,  B60G2400/202 ,  B60G2400/204 ,  B60G2400/40 ,  B60G2400/60 ,  B60G2400/82 ,  B60G2401/10 ,  B60G2401/14 ,  B60G2500/10 ,  B60G2500/30 ,  B60G2600/02 ,  B60G2600/60 ,  B60G2600/602 ,  B60G2600/70 ,  B60G2800/012 ,  B60G2800/014 ,  B60G2800/22 ,  B60G2800/24

摘要： An apparatus for controlling a damping force of a shock absorber provided between a wheel of a vehicle and a body thereof includes a road surface condition detecting unit for detecting a roughness of a road surface on which the vehicle is traveling, and a damping force characteristic alteration unit for altering the setting of the damping force of the shock absorber on the basis of the roughness of the road surface detected by the road surface condition detecting unit. The apparatus also includes a damping force detecting unit, for detecting a magnitude of the damping force of the shock absorber, and an alteration speed control unit for controlling, on the basis of the magnitude of the damping force detected by the damping force detecting unit, an alteration speed at which the setting of the damping force is altered so that the alteration speed decreases as the magnitude of the damping force increases.

公开(公告)号：US5097171A

公开(公告)日：1992-03-17

申请号：US425716

申请日：1989-10-24

申请人： Eiju Matsunaga ,  Yutaka Suzuki ,  Makoto Shiozaki ,  Toshinobu Ishida

发明人： Eiju Matsunaga ,  Yutaka Suzuki ,  Makoto Shiozaki ,  Toshinobu Ishida

IPC分类号： B60G17/0185 ,  F02D41/20 ,  H01L41/04

CPC分类号： B60G17/0185 ,  B60G2400/204 ,  B60G2400/40 ,  B60G2400/60 ,  B60G2401/12 ,  B60G2500/10 ,  B60G2600/08 ,  B60G2600/90 ,  F02D41/2096 ,  H01L41/042

摘要： A shock absorber system for controlling the damping forces of shock absorbers comprising a drive apparatus for operating a piezo-actuator which is constructed by laminating a plurality of piezoelectric elements. The drive apparatus comprises a high-voltage generation circuit for generating a high voltage and a charging and discharging circuit for applying the high voltage, generated by the high-voltage generation circuit, to the piezo-actuator and for discharging an electric charge charged in the piezo-actuator due to the application of the high voltage thereto, the charging and discharging results in expansion and contraction of the piezo-actuator. Also included in the drive apparatus is an abnormality detection circuit for detecting a charging current or a discharging current passing through a charging or discharging current passage coupled to the piezo-actuator at the time of charging or discharging by the charging and discharging circuit. The abnormality detection circuit determines an abnormality of the drive apparatus when the detected charging current or discharging current is below a predetermined value.

摘要翻译： 一种用于控制减震器的阻尼力的减震器系统，包括用于操作压电致动器的驱动装置，所述驱动装置通过层压多个压电元件而构成。 驱动装置包括用于产生高电压的高电压产生电路和用于将由高压产生电路产生的高电压施加到压电致动器的充电和放电电路，以及用于将充电的电荷放电 压电致动器由于施加高电压而导致压电致动器的膨胀和收缩。 驱动装置中还包括一个异常检测电路，用于检测通过充电或放电电路充电或放电时耦合到压电致动器的充电或放电电流通过的充电电流或放电电流。 当检测到的充电电流或放电电流低于预定值时，异常检测电路确定驱动装置的异常。

公开(公告)号：US5142475A

公开(公告)日：1992-08-25

申请号：US391283

申请日：1989-08-09

申请人： Eiju Matsunaga ,  Makoto Shiozaki ,  Yutaka Suzuki ,  Masatoshi Kuroyanagi ,  Toshinobu Ishida

发明人： Eiju Matsunaga ,  Makoto Shiozaki ,  Yutaka Suzuki ,  Masatoshi Kuroyanagi ,  Toshinobu Ishida

IPC分类号： B60G17/015 ,  B60G17/019

CPC分类号： B60G17/01941 ,  B60G2202/24 ,  B60G2202/42 ,  B60G2204/80 ,  B60G2400/102 ,  B60G2400/204 ,  B60G2400/5182 ,  B60G2400/821 ,  B60G2401/10 ,  B60G2500/102 ,  B60G2600/14 ,  B60G2600/184 ,  B60G2600/60 ,  B60G2600/602 ,  B60G2600/604 ,  B60G2600/90

摘要： The expanding/contracting accelerations of shock absorbers on a motor vehicle are detected and compared with preset accelerations, respectively, by an electronic controller, which individually varies the damping forces of the shock absorbers as a result of the comparison. The electronic controller corrects the preset accelerations so that the damping forces of the shock absorbers will be switched over at a uniform frequency or the damping forces of the front left and rear left shock absorbers and the damping forces of the front right and rear right shock absorbers will be switched over at a constant frequency.

摘要翻译： 通过电子控制器分别检测机动车辆上的减震器的膨胀/收缩加速度，并将其与预设加速度进行比较，电子控制器通过比较结果单独改变减震器的阻尼力。 电子控制器校正预设的加速度，使得减震器的阻尼力将以均匀的频率或前左后减震器的阻尼力和前右右后减震器的阻尼力切换 将以恒定频率切换。

公开(公告)号：US5129489A

公开(公告)日：1992-07-14

申请号：US424881

申请日：1989-10-20

申请人： Youzou Majima ,  Yutaka Suzuki ,  Eiju Matsunaga ,  Toshinobu Ishida ,  Sigeru Kamiya ,  Yasumasa Hagiwara ,  Masatoshi Kuroyanagi

发明人： Youzou Majima ,  Yutaka Suzuki ,  Eiju Matsunaga ,  Toshinobu Ishida ,  Sigeru Kamiya ,  Yasumasa Hagiwara ,  Masatoshi Kuroyanagi

IPC分类号： F16F9/46

CPC分类号： F16F9/46 ,  B60G2401/10 ,  B60G2500/10 ,  F02M2200/703

摘要： A variable-damping-force shock absorber includes a piezoelectric actuator for producing a displacement, a hydraulic pressure chamber filled with a working oil and having a volume variable in response to the displacement produced by said piezoelectric actuator, and a plunger slidably disposed in a sleeve and reciprocally movable in response to a change in the volume of said hydraulic pressure chamber. The sleeve and said plunger define therebetween a gap communicating with said hydraulic pressure chamber. A supply passage for supplying a working oil from an external working oil source into said hydraulic pressure chamber extends through the gap. A leakage of the working oil from the hydraulic pressure chamber through the gap can automatically be compensated for by working oil supplied through the supply passage. Since the working oil leaks from and is supplied into the hydraulic pressure chamber through the gap, the leakage and supply of the working oil are kept in equilibrium.

摘要翻译： 可变阻尼力减震器包括用于产生排量的压电致动器，填充有工作油的液压室，并且响应于由所述压电致动器产生的位移而具有体积可变的柱塞，以及可滑动地设置在套筒中的柱塞 并且能够响应于所述液压室的容积的变化而往复运动。 套筒和所述柱塞在其间限定与所述液压室连通的间隙。 用于将工作油从外部工作油源供给到所述液压室的供给通道延伸穿过所述间隙。 工作油通过间隙从液压室泄漏可以通过供给通道供给的工作油自动补偿。 由于工作油通过间隙从液压室泄漏并供给到液压室，所以工作油的泄漏和供给保持平衡。