公开(公告)号：US5341294A

公开(公告)日：1994-08-23

申请号：US748838

申请日：1991-08-23

申请人： Hirotaka Kanazawa ,  Takeshi Edahiro ,  Hiroki Yoshioka ,  Nobuhiro Totoki ,  Hiroyuki Noda ,  Takashi Nakashima ,  Hiroshi Ohmura ,  Takeshi Murai ,  Ryuya Akita

发明人： Hirotaka Kanazawa ,  Takeshi Edahiro ,  Hiroki Yoshioka ,  Nobuhiro Totoki ,  Hiroyuki Noda ,  Takashi Nakashima ,  Hiroshi Ohmura ,  Takeshi Murai ,  Ryuya Akita

IPC分类号： B62D7/15 ,  B62D5/06 ,  B62D6/02

CPC分类号： B62D7/1545 ,  B62D7/1518 ,  B62D7/159

摘要： In a four wheel steering system, the rear wheel turning mechanism is connected to the front wheel turning mechanism by way of a rear wheel turning angle ratio changing mechanism which is mechanically connected to both the front wheel turning mechanism and the rear wheel turning mechanism and transmits the mechanical displacement input thereinto from the front wheel turning mechanism to the rear wheel turning mechanism to drive the same by an amount the ratio of which to the amount of mechanical displacement input into the rear wheel turning angle ratio changing mechanism gives a predetermined rear wheel turning angle ratio. The rear wheel turning angle ratio changing mechanism is controlled in such a way that, when the front wheels are turned from the neutral position in a middle vehicle speed range, makes the rear wheel turning angle ratio negative for a moment immediately after initiation of turning of the front wheels and thereafter turns the same positive.

摘要翻译： 在四轮转向系统中，后轮转向机构通过与后轮转向机构和后轮转动机构机械连接的后轮转角变更机构与前轮转向机构连接， 从前轮转向机构到后轮转向机构的机械位移输入，以将其相对于输入到后轮转向角比变更机构的机械位移量的比例驱动到后轮转向机构， 角度比。 控制后轮转向角变更机构，使得当前轮在中间车速范围内从中立位置转动时，使后轮转向角比率在开始转动之后立刻为负 前轮然后转动相同的正面。

公开(公告)号：US5226499A

公开(公告)日：1993-07-13

申请号：US819632

申请日：1992-01-10

申请人： Hirotaka Kanazawa ,  Hiroshi Ohmura

发明人： Hirotaka Kanazawa ,  Hiroshi Ohmura

IPC分类号： B62D7/15

CPC分类号： B62D7/1581 ,  B62D7/159

摘要： A four-wheel steering system includes a front wheel turning mechanism which turns the front wheels in response to the turning of the steering wheel, a rear wheel turning mechanism which turns the rear wheels in response to the turning of the steering wheel, and a power steering mechanism. The rear wheel turning mechanism changes the rear wheel turning angle ratio, which is the ratio of the rear wheel turning angle to the front wheel turning angle on the basis of predetermined rear wheel turning angle ratio characteristic curve. A selecting switch selects one of a plurality of rear wheel turning angle ratio characteristic curves according to the running condition of the vehicle and causes the rear wheel turning mechanism to change the rear wheel turning angle ratio on the basis of the rear wheel turning angle ratio characteristic curve selected. The assisting force of the power steering mechanism is changed according to the rear wheel turning angle ratio characteristic curve selected by the selecting switch.

摘要翻译： 四轮转向系统包括响应于方向盘的转动而转动前轮的前轮转向机构，响应于方向盘的转动而使后轮转动的后轮转向机构，以及功率 转向机构。 后轮转向机构基于预定的后轮转向角特性曲线来改变后轮转向角比，后轮转向角比是后轮转向角与前轮转向角的比。 选择开关根据车辆的行驶状态选择多个后轮转向角特性曲线中的一个，并且使后轮转向机构基于后轮转向角比特性改变后轮转向角比 选择曲线 动力转向机构的辅助力根据由选择开关选择的后轮转向角比特性曲线而变化。

公开(公告)号：US5020619A

公开(公告)日：1991-06-04

申请号：US466543

申请日：1990-01-17

申请人： Hirotaka Kanazawa ,  Hiroshi Ohmura ,  Atsuo Tomoda ,  Akihiro Furuzawa ,  Takashi Nakashima ,  Masao Hideshima

发明人： Hirotaka Kanazawa ,  Hiroshi Ohmura ,  Atsuo Tomoda ,  Akihiro Furuzawa ,  Takashi Nakashima ,  Masao Hideshima

IPC分类号： B62D7/15

CPC分类号： B62D7/159

摘要： A rear wheel steering device for a vehicle has a steering control mechanism which steers rear wheels of the vehicle on the following formula:TG.theta..sub.R =-K.sub.F .multidot..theta..sub.F +K.sub.R .multidot.V.multidot..psi.whereTG.theta..sub.R : target steering angle of rear wheels.theta..sub.F : steering angle of front wheelsV: vehicle speed.theta.: yaw rateK.sub.F, K.sub.R : coefficients determined by the properties of vehicle.To achieve slip angle .beta.=0, the device further includes a vehicle condition detecting mechanism which detects various conditions of the vehicle, and a changing mechanism being connected with the steering control mechanism and the vehicle condition detecting mechanism for changing at least one of the coefficients K.sub.F, K.sub.R based on the conditions of the vehicle.

公开(公告)号：US5116078A

公开(公告)日：1992-05-26

申请号：US608981

申请日：1990-11-05

申请人： Hirotaka Kanazawa ,  Shin Takehara ,  Hiroshi Ohmura

发明人： Hirotaka Kanazawa ,  Shin Takehara ,  Hiroshi Ohmura

IPC分类号： B60G17/015 ,  B60G17/016 ,  B62D6/02 ,  B62D7/14 ,  B62D7/15

CPC分类号： B62D7/159 ,  B60G17/0163 ,  B60G2202/154 ,  B60G2400/102 ,  B60G2400/204 ,  B60G2400/206 ,  B60G2400/252 ,  B60G2400/41 ,  B60G2400/50 ,  B60G2400/5122 ,  B60G2400/60 ,  B60G2400/91 ,  B60G2500/10 ,  B60G2500/22 ,  B60G2500/30 ,  B60G2600/14 ,  B60G2600/16 ,  B60G2800/012 ,  B60G2800/014 ,  B60G2800/24

摘要： A vehicle control system includes an active suspension mechanism for providing a rolling property of a vehicle in a cornering operation of the vehicle and a suspension control device for controlling the vehicle in accordance with the rolling property provided by the active suspension mechanism and changing from one rolling property to another. A rear wheel steering mechanism steers a rear wheel in connection with steering of a front wheel, and a steering control device controls the steering of the rear wheel in accordance with a predetermined steering property and changes the steering property for the rear wheel. One of the steering property and the rolling property is changed in synchronism with a change in the other of the steering property and the rolling property. When a reverse phase property is provided for the rear wheel as a steering property and a reverse rolling property is provided for the active suspension system, the visibility of the cornering direction and the operability are improved to accomplish an active operation property. Alternatively when a same phase property is provided for the rear wheel as a steering property, the running stability can be improved.

摘要翻译： 车辆控制系统包括用于在车辆的转弯操作中提供车辆的滚动性能的主动悬挂机构和根据主动悬架机构提供的滚动特性来控制车辆的悬架控制装置，并且从一个滚动 财产到另一个。 后轮转向机构与前轮的转向相关联地转向后轮，并且转向控制装置根据预定的转向属性来控制后轮的转向，并改变后轮的转向性能。 转向属性和滚动属性之一与转向属性和滚动属性中的另一个的变化同步地改变。 当为后轮提供反相特性作为转向属性并且为主动悬架系统提供反向滚动特性时，提高了转弯方向的可视性和可操作性，以实现主动操作性能。 或者，当为后轮设置相同的相位特性作为转向属性时，可以提高行驶稳定性。

公开(公告)号：US5083628A

公开(公告)日：1992-01-28

申请号：US609636

申请日：1990-11-06

申请人： Hirotaka Kanazawa ,  Hiroshi Ohmura ,  Takashi Nakashima

发明人： Hirotaka Kanazawa ,  Hiroshi Ohmura ,  Takashi Nakashima

IPC分类号： B62D6/00 ,  B62D7/14 ,  B62D7/15 ,  B62D101/00 ,  B62D113/00

CPC分类号： B62D7/1536 ,  B62D7/159

摘要： A rear wheel steering device for a vehicle which is provided with a rear wheel steering shaft which steers rear wheels by its displacement, a neutrally holding means which constantly biases the rear wheel steering shaft to the neutral position, a motor which is linked with the rear wheel steering shaft and changes the steering angle ratio which is a ratio of the rear wheel steering angle to the front wheel steering angle by displacing the rear wheel steering shaft and an oil pressure assist means which assists displacement of the rear wheel steering shaft by the motor by oil pressure force. This device is further provided with oil pressure supply means which supplies oil pressure to the oil pressure assist means and oil pressure control means which, when working the motor at the initial check, controls the oil pressure supply means to make the oil pressure assist means supply oil pressure to the oil pressure assist means before working of the motor.

摘要翻译： 一种用于车辆的后轮转向装置，其具有通过其位移来转向后轮的后轮转向轴，将后轮转向轴恒定地偏压到中立位置的中立保持装置，与后方连接的电动机 车轮转向轴，并且通过使后轮转向轴移位来改变作为后轮转向角与前轮转向角的比的转向角比，以及通过电动机辅助后轮转向轴的位移的油压辅助装置 通过油压力。 该装置还具备向油压辅助装置和油压控制机构供给油压的油压供给机构，在初次检查时对电动机进行加工的情况下，控制油压供给机构使供油辅助装置 在电动机工作之前对油压辅助装置的油压。

公开(公告)号：US5082080A

公开(公告)日：1992-01-21

申请号：US735671

申请日：1991-07-26

申请人： Hirotaka Kanazawa ,  Hiroshi Ohmura

发明人： Hirotaka Kanazawa ,  Hiroshi Ohmura

IPC分类号： B62D6/02 ,  B62D7/14 ,  B62D7/15

CPC分类号： B62D7/1581 ,  B62D7/159

摘要： A four-wheel steering system includes a front wheel turning mechanism which turns the front wheels in response to the turning of the steering wheel, a rear wheel turning mechanism which turns the rear wheels in response to the turning of the steering wheel, and a power steering mechanism. The rear wheel turning mechanism changes the rear wheel turning angle ratio, which is the ratio of the rear wheel turning angle to the front wheel turning angle, on the basis of predetermined rear wheel turning angle ratio characteristic curves. The assisting force of the power steering mechanism is changed when the rear wheel turning mechanism fails.

摘要翻译： 四轮转向系统包括响应于方向盘的转动而转动前轮的前轮转向机构，响应于方向盘的转动而使后轮转动的后轮转向机构，以及功率 转向机构。 后轮转向机构基于预定的后轮转向角特性曲线来改变后轮转向角比（后轮转向角与前轮转向角的比）。 当后轮转向机构发生故障时，动力转向机构的辅助力发生变化。

公开(公告)号：US5007494A

公开(公告)日：1991-04-16

申请号：US358020

申请日：1989-05-30

申请人： Hiroshi Ohmura ,  Satoru Tanabe ,  Junji Yoshioka ,  Hirotaka Kanazawa

发明人： Hiroshi Ohmura ,  Satoru Tanabe ,  Junji Yoshioka ,  Hirotaka Kanazawa

IPC分类号： B62D7/14

CPC分类号： B62D7/148

摘要： A rear wheel turning mechanism in a four wheel steering system includes a rear wheel turning rod which is connected to the rear wheels of the vehicle and is adapted such that it can be displaced and thereby turn the rear wheels. An electric motor is operatively connected to the rear wheel turning rod and the steering wheel and displaces the rear wheel turning rod, thereby causing the rear wheels to turn in response to operation of the steering wheel. A rear-wheel-neutralizing spring urges the rear wheel turning rod to the neutral position in which the rear wheels are held in the straight-ahead position. A pair of clutches are interposed in series between the electric motor and the rear wheel turning rod and are adapted such that they disconnect the latter from the former, which permits the latter to return to the neutral position under the force of the rear-wheel-neutralizing spring.

公开(公告)号：US5303791A

公开(公告)日：1994-04-19

申请号：US769196

申请日：1991-09-30

申请人： Hiroyuki Hayashi ,  Toshiro Kondo ,  Fumitaka Ando ,  Hirotaka Kanazawa ,  Takeshi Edahiro ,  Ryuya Akita

发明人： Hiroyuki Hayashi ,  Toshiro Kondo ,  Fumitaka Ando ,  Hirotaka Kanazawa ,  Takeshi Edahiro ,  Ryuya Akita

IPC分类号： B62D7/15 ,  B62D5/04

CPC分类号： B62D7/1581 ,  B62D7/159

摘要： Two support members which are supported swingably to the vehicle body through the medium of the support axis extending in up and down direction are provided at the vehicle body end portions of two left and right suspension arm members connecting left and right rear wheels to the vehicle body. Lever parts are extended from the support members toward the opposing direction to each other and are interconnected by a link member. One of the two support members is driven by one actuator for rotation around an support axis, whereby left and right two suspension arm members move in vehicle widthwise direction, opposite to each other, and in synchronism with each other and thus left and right rear wheels are steered symmetrically in toe-in direction or toe-out direction. Since the motive power mechanism part is of simple construction using link members, and engaging parts of gears can be lessened, the device according to the present invention can contribute to compactness and cost reduction and also can restrict "shaking" in rear wheel steering due to backlash of gears.

摘要翻译： 通过沿着上下方向延伸的支撑轴的介质可摆动地支撑在车体上的两个支撑构件设置在将左右后轮连接到车体的两个左右悬架臂构件的车身端部 。 杠杆部件从支撑构件朝向彼此相反的方向延伸并且通过连杆构件相互连接。 两个支撑构件中的一个由一个致动器驱动以围绕支撑轴线旋转，由此左和右两个悬架臂构件在车辆宽度方向上彼此相反地移动，并且彼此同步，因此左右后轮 对称地沿着方向或脚趾向方向转向。 由于动力机构部分使用连杆构件的结构简单，并且可以减小齿轮的接合部分，所以根据本发明的装置可以有助于紧凑性和成本降低，并且还可以限制由于后轮转向而产生的“晃动” 齿轮间隙

公开(公告)号：US5193638A

公开(公告)日：1993-03-16

申请号：US717070

申请日：1991-06-18

申请人： Koji Fujio ,  Yutaka Tagashira ,  Hiroshi Ogawa ,  Hirotaka Kanazawa ,  Hiroki Yoshioka

发明人： Koji Fujio ,  Yutaka Tagashira ,  Hiroshi Ogawa ,  Hirotaka Kanazawa ,  Hiroki Yoshioka

IPC分类号： B62D7/15

CPC分类号： B62D7/159

摘要： A reference position detection method of a vehicle rear wheel steering apparatus in the present invention, is provided with steps of setting an input shaft and the yoke assembly at arbitrary angular positions rotating the input shaft by an arbitrary angle to pass a neutral angular position measuring a rotational angle .theta. of the input shaft and a moving amount .delta.1 of an output rod assembly upon rotation of the input shaft rotating the yoke assembly to pass a neutral angular position so that the output rod assembly is stroke-moved by a moving amount -.delta.1 from a stroke position defined by the moving amount .delta.1 of the output rod assembly rotating the input shaft by an angle -.theta. after rotating the yoke assembly, and measuring a moving amount .delta.2 of the output rod assembly; and determining, as a reference position of the yoke assembly, an angular position obtained by rotating the yoke assembly from the rotated state of the input shaft so that the output rod assembly is displaced by -.delta.2.sup.2 /(.delta.1+.delta.2).

公开(公告)号：US4817986A

公开(公告)日：1989-04-04

申请号：US177933

申请日：1988-04-05

申请人： Hirotaka Kanazawa ,  Akira Marumoto ,  Kouji Tsuji

发明人： Hirotaka Kanazawa ,  Akira Marumoto ,  Kouji Tsuji

IPC分类号： B60G7/00 ,  B60G3/20 ,  B60G7/02 ,  B60G21/04 ,  B60G21/055 ,  B62D7/14 ,  B62D7/15 ,  B62D21/02 ,  B62D65/00 ,  B62D21/00

CPC分类号： B62D65/00 ,  B60G3/20 ,  B60G3/202 ,  B60G7/02 ,  B62D7/1527 ,  B60G2204/15

摘要： The present invention relates to a suspension system in a vehicle body assembly which is used in common for a four-wheel-steering vehicle and a two-wheel-steering vehicle. In the present invention, a front suspension system installed in a four-wheel-steering vehicle is set to have a higher lateral rigidity than when installed in a two-wheel-steering vehicle, so that the front suspension system can withstand the lateral forces acting on the front wheels of the four-wheel-steering vehicle, said lateral forces being larger than those in a two-wheel-steering vehicle. Further, the suspension system is set to have a lowered rigidity against rolling of the vehicle body where it is installed in a four-wheel-steering vehicle, whereby the riding comfort can be maintained as that of the two-wheel-steering vehicle. In addition, a front steering mechanism installed in a four-wheel-steering vehicle is set to have a steering ratio which is smaller than where it is installed in a two-wheel-steering vehicle, by which even when the rear wheels are steered in the same direction as the front wheels, the four-wheel-steering vehicle can be handled in the same manner as the two-wheel-steering vehicle.