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公开(公告)号：US4646867A
公开(公告)日：1987-03-03
申请号：US791106
申请日：1985-10-24
申请人： Hirotaka Kanazawa , Teruhiko Takatani , Shigeki Furutani , Isamu Chikuma , Satoru Shimada , Hiroshi Eda
发明人： Hirotaka Kanazawa , Teruhiko Takatani , Shigeki Furutani , Isamu Chikuma , Satoru Shimada , Hiroshi Eda
CPC分类号： B62D7/1527
摘要： A four-wheel steering system comprises a steering wheel; a steering shaft which is connected to the steering wheel to be rotated in response to operation of the steering wheel and is provided with a first pinion fixedly mounted thereon; a rack bar which is supported for sliding motion in the transverse direction of the vehicle body, is provided with a first rack gear in mesh with the first pinion and a second rack gear, and is connected to the right and left front wheels by way of tie rods, a rear wheel turning force taking-out mechanism which includes a second pinion in mesh with the second rack gear on the rack bar and a rod member connected to the second pinion, and which converts the sliding motion of the rack bar into rotation of the rod member; and a rear wheel turning mechanism which is arranged to turn the rear wheels in response to rotation of the rod member. There are provided a first resilient pressing mechanism which presses one of the first and second rack gears, from the rear, towards the pinion in mesh therewith, and a second resilient pressing mechanism which presses the pinion in mesh with the other of the first and second rack gears toward said the other of the first and second rack gears.
摘要翻译： 四轮转向系统包括方向盘; 转向轴，其连接到所述方向盘以响应于所述方向盘的操作而旋转，并且设置有固定地安装在所述方向盘上的第一小齿轮; 支撑在车身横向上的滑动运动的齿条设置有与第一小齿轮和第二齿条啮合的第一齿条，并且通过以下方式连接到左右前轮 拉杆，后轮转向力取出机构，其包括与齿条上的第二齿条啮合的第二小齿轮和连接到第二小齿轮的杆构件，并且将齿条的滑动运动转换成旋转 的杆件; 以及后轮转动机构，其被布置成响应于所述杆构件的旋转而转动所述后轮。 设置有第一弹性挤压机构，其将第一和第二齿条中的一个从后部朝向与其啮合的小齿轮按压;以及第二弹性挤压机构，其将小齿轮与第一和第二齿轮中的另一个啮合 朝向所述第一和第二齿条中的另一个的齿条齿轮。
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公开(公告)号：US4610328A
公开(公告)日：1986-09-09
申请号：US696144
申请日：1985-01-29
申请人： Hirotaka Kanazawa , Teruhiko Takatani , Shigeki Furutani , Isamu Chikuma , Satoru Shimada , Hiroshi Eda
发明人： Hirotaka Kanazawa , Teruhiko Takatani , Shigeki Furutani , Isamu Chikuma , Satoru Shimada , Hiroshi Eda
CPC分类号： B62D7/1527
摘要： The rear wheels of a vehicle are turned in response to the turning of the front wheels upon operation of the steering wheel. A rack member is provided to be operatively connected with a movable member of the front wheel steering system which is moved right and left in response to operation of the steering wheel so that the rack member is moved together with the movable member. The rack member is in mesh with a pinion fixed to an end of an output shaft whose rotation is transmitted to the rear wheel steering system as steering force for moving it by way of a transmission shaft.
摘要翻译： 车辆的后轮在方向盘操作时响应于前轮的转动而转动。 齿条构件设置成与前轮转向系统的可动构件可操作地连接，该可动构件响应于方向盘的操作而左右移动，使得齿条构件与可动构件一起移动。 齿条构件与固定到输出轴的端部的小齿轮啮合，该小齿轮的旋转作为用于通过传动轴移动的转向力传递到后轮转向系统。
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公开(公告)号：US4732231A
公开(公告)日：1988-03-22
申请号：US895227
申请日：1986-08-11
申请人： Hirotaka Kanazawa , Teruhiko Takatani , Shigeki Furutani , Isamu Chikuma , Satoru Shimada , Hiroshi Eda
发明人： Hirotaka Kanazawa , Teruhiko Takatani , Shigeki Furutani , Isamu Chikuma , Satoru Shimada , Hiroshi Eda
CPC分类号： B62D7/1536
摘要： A vehicle four wheel steering system including a rear wheel steering mechanism with a power assist device. The rear wheel steering mechanism includes a steering rod extending transversely of the vehicle and having the opposite ends connected with tie rods which are in turn connected with knuckle arms of the rear wheels. The steering rod is provided with a power cylinder in which a piston is slidably disposed. The piston is provided on the steering rod and defines hydraulic chambers in the cylinder. A control valve is provided to control hydraulic oil supply to the power cylinder. The control valve has a casing which is connected with the steering rod through an interconnecting section and hydraulic oil passages are formed in the interconnecting section for passing hydraulic oil to and from the power cylinder.
摘要翻译： 一种车辆四轮转向系统，包括具有动力辅助装置的后轮转向机构。 后轮转向机构包括横向于车辆延伸的转向杆，并且其相对端与拉杆连接，该拉杆又与后轮的转向节相连。 转向杆设置有动力缸，其中可滑动地设置有活塞。 活塞设置在转向杆上，并在气缸中限定液压室。 提供控制阀来控制动力油缸的液压油供给。 控制阀具有通过互连部分与转向杆连接的壳体，并且在互连部分中形成液压油通道，用于使液压油与动力油缸相通。
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公开(公告)号：US4621702A
公开(公告)日：1986-11-11
申请号：US647431
申请日：1984-09-05
申请人： Hirotaka Kanazawa , Teruhiko Takatani , Shigeki Furutani , Isamu Chikuma , Satoru Shimada , Hiroshi Eda
发明人： Hirotaka Kanazawa , Teruhiko Takatani , Shigeki Furutani , Isamu Chikuma , Satoru Shimada , Hiroshi Eda
CPC分类号： B62D7/1536
摘要： In a four-wheel steering apparatus of a vehicle for steering also the rear wheels in conformity with the steering of the front wheels by a steering wheel, a control force for a rear wheel steering device is mechanically taken out from a front wheel steering device and is suitably controlled in the intermediate portion and is transmitted as a steering control force to the rear wheel steering device, whereby the front wheels and the rear wheels are steered in the same direction when the absolute value of the steering angle of the front wheels is less than a predetermined value, and the rear wheels are steered in the direction reverse to the front wheels when the absolute value is greater than the predetermined value. In the intermediate portion, the taken-out control force is divided into a same direction steering control force for steering the rear wheels in the same direction as the front wheels and a reverse direction steering control force for steering the rear wheels in the direction reverse to the front wheels, and the reverse direction steering control force is absorbed and only the same direction steering control force is transmitted to the rear wheel steering device when the absolute value is less than the predetermined value, and the same direction steering control force is absorbed and only the reverse direction steering control force is transmitted to the rear wheel steering device when the absolute value is greater than the predetermined value.
摘要翻译： 在用于转向的后轮与前轮的方向盘的转向相一致的车辆的四轮转向装置中，用于后轮转向装置的控制力从前轮转向装置机械地取出， 适当地控制在中间部分并作为转向控制力传递到后轮转向装置，由此当前轮的转向角的绝对值较小时，前轮和后轮被转向相同的方向 超过预定值，并且当绝对值大于预定值时，后轮在与前轮相反的方向上转向。 在中间部分中，取出的控制力被分成与前轮相同的方向转向后轮的相同方向的转向控制力和用于使后轮在与前轮相反的方向上转向的反向转向控制力 前轮和反向转向控制力被吸收，并且当绝对值小于预定值时，只有相同的方向转向控制力传递到后轮转向装置，并且相同的方向转向控制力被吸收，并且 当绝对值大于预定值时，只有反方向转向控制力传递到后轮转向装置。
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公开(公告)号：US4572316A
公开(公告)日：1986-02-25
申请号：US709723
申请日：1985-03-08
申请人： Hirotaka Kanazawa , Takatani Teruhiko , Furutani Shigeki , Isamu Chikuma , Satoru Shimada , Hiroshi Eda
发明人： Hirotaka Kanazawa , Takatani Teruhiko , Furutani Shigeki , Isamu Chikuma , Satoru Shimada , Hiroshi Eda
CPC分类号： B62D7/1536
摘要： A four-wheel steering system for a vehicle comprising a steering mechanism including a steering wheel, a front wheel turning mechanism operatively connected to the steering mechanism to turn the front wheels according to the turning angle of the steering wheel, a rear wheel turning mechanism operatively connected to the steering mechanism to turn the rear wheels in response to operation of the steering wheel, and a rear wheel steering ratio changing mechanism for changing the ratio of the turning angle of the rear wheels to the turning angle of the steering wheel.
摘要翻译： 一种用于车辆的四轮转向系统，其包括转向机构，该转向机构包括方向盘，前轮转向机构，其可操作地连接到所述转向机构，以根据所述方向盘的转动角转动所述前轮， 连接到转向机构以响应于方向盘的操作来转动后轮;以及后轮转向比改变机构，用于改变后轮的转向角度与方向盘的转向角度的比率。
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公开(公告)号：US4828064A
公开(公告)日：1989-05-09
申请号：US65651
申请日：1987-06-24
IPC分类号： B62D6/02 , B62D6/00 , B62D7/14 , B62D101/00 , B62D111/00
摘要： In a four-wheel steering system for a vehicle, a rear wheel turning mechanism for turning the rear wheels is controlled so that the ratio of the rear wheel turning angle to the front wheel turning angle changes with change in the vehicle speed. The ratio of the rear wheel turning angle to the front wheel turning angle is set so that the vehicle lateral acceleration response characteristics and the vehicle heading response characteristics generated by operation of the steering wheel approximate each other as far as possible.
摘要翻译： 在用于车辆的四轮转向系统中，控制用于转动后轮的后轮转向机构，使得后轮转向角与前轮转向角的比随车速的变化而变化。 后轮转向角度与前轮转向角度的比率被设定为使得通过方向盘的操作产生的车辆横向加速度响应特性和车辆行驶方向响应特性尽可能近似。
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公开(公告)号：US4733878A
公开(公告)日：1988-03-29
申请号：US874687
申请日：1986-06-16
申请人： Hirotaka Kanazawa , Masaki Watanabe , Shigeki Furutani , Yoshihiro Watanabe , Teruhiko Takatani , Shunsuke Kawasaki , Noritaka Yasuda , Akihiro Watanabe
发明人： Hirotaka Kanazawa , Masaki Watanabe , Shigeki Furutani , Yoshihiro Watanabe , Teruhiko Takatani , Shunsuke Kawasaki , Noritaka Yasuda , Akihiro Watanabe
CPC分类号： B62D7/1536
摘要： A four-wheel steering system for a vehicle comprises a steering wheel, a front wheel turning mechanism for turning the front wheels in response to operation of the steering wheel, a rear wheel turning mechanism including a rear wheel steering ratio determining circuit for determining the rear wheel steering ratio and an actuator for turning the rear wheels according to the rear wheel steering ratio determined by the rear wheel steering ratio determining circuit. The four-wheel steering system is provided with a road condition sensor for detecting road surface conditions which can weaken the road gripping force of the wheels and a rear wheel steering ratio controller for changing the rear wheel steering ratio determined by the rear wheel steering ratio determining circuit so that the rear wheel steering ratio is increased when the road condition is such that the road gripping force of the wheels can be weakened.
摘要翻译： 用于车辆的四轮转向系统包括方向盘，用于响应于方向盘的操作而转动前轮的前轮转向机构，包括后轮转向比确定电路的后轮转向机构，用于确定后轮 车轮转向比和用于根据由后轮转向比确定电路确定的后轮转向比来转动后轮的致动器。 四轮转向系统设置有道路状况传感器，用于检测能够削弱车轮的道路夹紧力的路面状况，以及用于改变后轮转向比确定的后轮转向比的后轮转向比控制器 使得当道路状况使得车轮的道路夹紧力可以减弱时，后轮转向比增加。
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公开(公告)号：US4982804A
公开(公告)日：1991-01-08
申请号：US315116
申请日：1989-02-24
申请人： Hirotaka Kanazawa , Yoichi Takeda , Yukio Noguchi , Isamu Chikuma , Satoru Shimada , Kazuo Chikaraishi
发明人： Hirotaka Kanazawa , Yoichi Takeda , Yukio Noguchi , Isamu Chikuma , Satoru Shimada , Kazuo Chikaraishi
IPC分类号： B62D7/15
CPC分类号： B62D7/1536
摘要： Rotaton of a steering wheel is transmitted to a steering ratio changing mechanism which displaces an output displacement member according to the steering wheel turning angle to obtain a desired steering ratio. A displacment transmission member transmits the displacement of the output displacement member to a valve member of a hydraulic switching valve and a wheel turning rod is displaced under the force of a hydraulic power cylinder in response to displacement of the valve member. The displacement transmission member is operatively connected to the output displacement member, the valve member and the wheel turning rod to be operated to displace the valve member in a predetermined direction in response to a displacement of the output displacement member and to be operated to displace the valve member in the direction opposite to the predetermined direction in response to a displacement of the wheel turning rod generated by the displacement of the valve member, so that the wheel turning rod is displaced in response to displacement of the output displacement member with the valve member being hardly displaced.
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公开(公告)号：US4552239A
公开(公告)日：1985-11-12
申请号：US545190
申请日：1983-10-25
CPC分类号： B62D7/1572 , B62D7/1545
摘要： In the four-wheeled vehicle, both the front and rear wheels are turned in response to operation of the steering wheel. The turning angle of the rear wheels is controlled in accordance with a turning angle ratio characteristic curve defined on a .theta.F-.theta.R plane wherein .theta.F and .theta.R respectively represent the turning angles of the front and rear wheels. The turning angle ratio characteristic curve is substantially a broken line having a positive inclination in the region where the value of the front wheel turning angle .theta.F is smaller than a predetermined value and having a smaller inclination in the region where the value of the front wheel turning angle .theta.F is larger than the predetermined value. The turning angle ratio characteristic curve is changed according to the vehicle speed so that the turning angle ratio .theta.R/.theta.F is increased as the vehicle speed increases.
摘要翻译： 在四轮车中，前轮和后轮都响应于方向盘的操作而转动。 根据在θF-θR平面上定义的转角比特性曲线来控制后轮的转向角，其中θF和θR分别表示前轮和后轮的转向角。 转向角比特性曲线基本上是在前轮转向角度θ的值小于预定值并且在前轮的值的区域具有较小倾斜度的区域中具有正倾斜度的虚线 转角θF大于预定值。 转向角比特性曲线根据车速而改变，使得转向角比θR /θF随着车速的增加而增加。
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公开(公告)号：US4657102A
公开(公告)日：1987-04-14
申请号：US821875
申请日：1986-01-27
CPC分类号： B62D7/1545 , B62D7/1572
摘要： In a four-wheeled vehicle, the rear wheels are turned as well as the front wheels in response to operation of the steering wheel. The rear wheel turning angle characteristics relative to the front wheel turning angle is changed according to the vehicle speed. In the low to high vehicle speed region, the rear wheel turning angle is increased with increase of the front wheel turning angle and the increasing rate is increased as the vehicle speed increases. In the very low vehicle speed region, the rear wheels are not turned until the front wheels are turned at least by a predetermined angle, and are turned in the direction opposite to the front wheels when the front wheels are turned by an angle larger than the predetermined angle. The rear wheel turning angle in the opposite direction is changed in proportion to the front wheel turning angle.
摘要翻译： 在四轮车中，响应于方向盘的操作，后轮被转动以及前轮。 相对于前轮转向角度的后轮转向角特性根据车速而变化。 在低到高车速区域中，随着前轮转向角度的增加，后轮转向角度增加，并且随着车速的增加而增加速度。 在非常低的车速区域中，后轮直到前轮至少旋转预定角度才转动，并且当前轮转动大于前轮的角度时，在与前轮相反的方向上转动后轮 预定角度。 相反方向的后轮转向角度与前轮转向角成比例地变化。
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