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1.发明授权Method of incorporating four-wheel steering system in vehicle and four-wheel steering system 失效在车辆和四轮转向系统中结合四轮转向系统的方法
公开(公告)号：US4854410A
公开(公告)日：1989-08-08
申请号：US158921
申请日：1988-02-22
Applicant: Hirotaka Kanazawa , Koushun Note , Yasuhiro Nakashima , Yoshiaki Mukai , Shunji Sakamoto , Shigeo Okamizu
Inventor： Hirotaka Kanazawa , Koushun Note , Yasuhiro Nakashima , Yoshiaki Mukai , Shunji Sakamoto , Shigeo Okamizu
IPC: B62D7/15
CPC classification number: B62D7/15 , B62D7/1545
Abstract: A four-wheel steering system has a front wheel turning mechanism for turning front wheels in response to operation of a steering wheel, a rear wheel turning mechanism for turning rear wheels, a controller for controlling the rear wheel turning mechanism to turn the rear wheels according to preset four-wheel steering characteristics and a relay shaft which is connected to the controller to transmit turning of the front wheels to the controller. The front wheel turning mechanism and the rear wheel turning mechanism are caused to bring the front wheels and the rear wheels to the respective straight-ahead positions while the relay shaft is disconnected from the controller. Then the controller is brought into the state corresponding to the straight-ahead positions of the front and rear wheels on the basis of the preset four-wheel steering characteristics. Thereafter, the relay shaft is connected to the controller.
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公开(公告)号：US4792007A
公开(公告)日：1988-12-20
申请号：US88908
申请日：1987-08-24
Applicant: Masaru Abe , Masami Ogura , Tsuyoshi Sato
Inventor： Masaru Abe , Masami Ogura , Tsuyoshi Sato
CPC classification number: B62D7/1527 , B62D7/1545
Abstract: A mechanism for steering the front and rear wheels of a four-wheel-steerable vehicle includes a front wheel steering device operatively coupled to a steering wheel and having at least a rack-and-pinion gear mechanism having a nonlinear gear ratio, a rear wheel steering device, a linkage shaft operatively connecting the front wheel steering device and the rear wheel steering device to each other, and at least one steering force assisting device disposed in a steering force transmitting path comprising the front wheel steering device, the rear wheel steering device, and the linkage shaft.
Abstract translation: 用于转向四轮转向车辆的前轮和后轮的机构包括前轮转向装置，其可操作地联接到方向盘并且具有至少一个具有非线性变速比的齿条和小齿轮齿轮机构，后轮 转向装置，将前轮转向装置和后轮转向装置彼此操作地连接的联动轴以及设置在转向力传递路径中的至少一个转向力辅助装置，该转向力辅助装置包括前轮转向装置，后轮转向装置 ，和连杆轴。
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公开(公告)号：US4758012A
公开(公告)日：1988-07-19
申请号：US010177
申请日：1987-02-02
Applicant: Masami Ogura , Yasuharu Oyama , Toru Yasuda , Masaru Abe , Yoshimichi Kawamoto , Tsuyoshi Sato
Inventor： Masami Ogura , Yasuharu Oyama , Toru Yasuda , Masaru Abe , Yoshimichi Kawamoto , Tsuyoshi Sato
CPC classification number: B62D7/1527 , B62D7/1545
Abstract: A steering system for a vehicle having a steering wheel, steerable front wheels and steerable rear wheels. The system comprises a linkage arrangement operatively interconnecting the steering wheel with the front and rear wheels for steering the front and rear wheels in response to operation of the steering wheel. The linkage arrangement includes a mechanical linkage mechanically connected with the steering wheel so as to transmit steering effort. The mechanical linkage is provided with a restoring mechanism for exerting restoring force to said mechanical linkage so as to urge the steering wheel toward a neutral position thereof. Favorable returnability of the steering system is achieved in this arrangement.
Abstract translation: 一种用于具有方向盘，可转向前轮和可转向后轮的车辆转向系统。 该系统包括可操作地将方向盘与前轮和后轮互连的连杆装置，用于响应于方向盘的操作来转向前轮和后轮。 连杆机构包括与方向盘机械连接的机械连杆，以便传递转向力。 机械联动装置设置有用于向所述机械联动装置施加恢复力的恢复机构，以便将方向盘推向其中立位置。 在这种布置中实现了转向系统的良好的可回复性。
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公开(公告)号：US4697816A
公开(公告)日：1987-10-06
申请号：US822043
申请日：1986-01-24
Applicant: Yoshimichi Kawamoto , Yoshimi Furukawa , Tetsuro Hamada , Mitsuya Serizawa
Inventor： Yoshimichi Kawamoto , Yoshimi Furukawa , Tetsuro Hamada , Mitsuya Serizawa
CPC classification number: B62D7/1545
Abstract: In a front and rear wheel steering device for a vehicle in which the steering angle ratio of the rear wheels relative to the front wheels is variable according to the vehicle speed, by accounting for the magnitude of vehicle acceleration in determining the steering angle ratio of the rear wheels by selecting a mathematical function from a plurality thereof, the vehicle response particularly in high speed range can be improved. Smooth transition from a certain characteristics to another may be achieved either by preparing a number of mathematical functions of vehicle speed for the steering angle ratio of the rear wheels or providing some time delay in the transition from one characteristics to another, preferably in proportion to the magnitude of the vehicle acceleration.
Abstract translation: 在前轮和后轮转向装置中，其中后轮相对于前轮的转向角比可根据车速而变化，通过考虑确定车辆的转向角比的车辆加速度的大小， 通过从多个数学函数中选择数学函数，可以提高特别是在高速范围内的车辆响应。 从一定特性到另一特性的平滑过渡可以通过为后轮的转向角比准备多个车速的数学函数或者在从一个特性到另一特性的转变中提供一些时间延迟来实现，优选地与 车辆加速度的大小。
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公开(公告)号：US4660844A
公开(公告)日：1987-04-28
申请号：US684057
申请日：1984-12-20
Applicant: Osamu Yamamoto , Shoichi Sano , Yoshimi Furukawa
Inventor： Osamu Yamamoto , Shoichi Sano , Yoshimi Furukawa
CPC classification number: B62D7/1545
Abstract: A steering system for a vehicle with a front wheel and a rear wheel, in which the rear wheel is steerable in relation to a steering operation of the front wheel, such that a ratio control of a steered angle ratio of the rear wheel to the front wheel is effected to be variable in accordance with a travelling speed of the vehicle. The steering system is provided with a mode selecting unit adapted to be manually operable for exclusively setting an arbitrary one of a plurality of control modes of the ratio control. The steering system may be further provided with a time-delay unit for gradually effecting the ratio control, when changing one of the control modes to another thereof.
Abstract translation: 一种用于具有前轮和后轮的车辆的转向系统，其中后轮相对于前轮的转向操作是可转向的，使得后轮与前轮的转向角比的比率控制 车轮根据车辆的行驶速度而变化。 该转向系统设置有一个模式选择单元，该模式选择单元适于手动操作，专门设置比率控制的多个控制模式中的任意一个。 转向系统还可以设置有时间延迟单元，用于当将其中一个控制模式改变为另一控制模式时逐渐实现比率控制。
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Patent Agency Ranking
公开(公告)号：US4657102A
公开(公告)日：1987-04-14
申请号：US821875
申请日：1986-01-27
Applicant: Hirotaka Kanazawa , Teruhiko Takatani , Naoto Takata
Inventor： Hirotaka Kanazawa , Teruhiko Takatani , Naoto Takata
CPC classification number: B62D7/1545 , B62D7/1572
Abstract: 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.
Abstract translation: 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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公开(公告)号：US4566709A
公开(公告)日：1986-01-28
申请号：US659323
申请日：1984-10-10
Applicant: Shoichi Sano
Inventor： Shoichi Sano
CPC classification number: B62D7/1545
Abstract: A steering system for vehicles in which the steered angle ratio (k) of a rear wheel (20) to a front wheel (7) is controllable by a control means (31) in accordance with the vehicle speed (u.sub.1), and the correction of the steered angle ratio in accordance with the vehicle speed (u.sub.1) is permitted under a predetermined condition only.The steering system has a speed control mechanism (35, 35) connected to the control means and controlled therewith, so that the vehicle speed (u.sub.1) is decreased or held constant when the relative deviation (u.sub.1 -u.sub.2) between the vehicle speed (u.sub.1) the vehicle actually has and a vehicle speed (u.sub.2) converted from the steered angle ratio (k) the vehicle actually has is larger than a predetermined value [f(u.sub.1)].
Abstract translation: 一种用于车辆的转向系统，其中后轮（20）与前轮（7）的转向角（k）可根据车速（u1）由控制装置（31）控制，并且校正 仅在预定条件下允许根据车速（u1）的转向角比。 转向系统具有连接到控制装置并受其控制的速度控制机构（35,35），使得当车速（u1-u1-u2）之间的相对偏差（u1-u2） ），并且从车辆实际具有的转向角度比（k）转换的车速（u2）大于预定值[f（u1）]。
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公开(公告)号：US4313514A
公开(公告)日：1982-02-02
申请号：US107717
申请日：1979-12-28
Applicant: Yoshimi Furukawa , Shoichi Sano
Inventor： Yoshimi Furukawa , Shoichi Sano
CPC classification number: B62D7/1545
Abstract: A steering apparatus for vehicles which includes a pinion rotatably mounted on an arm movable longitudinally in response to turning movement of a steering wheel, and a pair of longitudinally movable racks held in meshing engagement with the pinion. One of the racks is operatively coupled with front wheels of the vehicle and with a pivot arm pivotable on a movable pivot which is displaceable along the pivot arm in response to vehicle speeds. The other rack is coupled through a pivotable lever with an arm which is pivotally mounted on the pivot arm and is operatively coupled with the rear wheels. When the steering wheel is turned, the front and rear wheels are turned in the same direction or in opposite directions, depending on the position of the movable pivot on the pivot arm, which position is a function of the vehicle speed. The front and rear wheels are turned in the same direction when the vehicle is running at a high speed, and in opposite directions when the vehicle is running at a low speed. The racks and pinion may be dispensed with and the front wheels operatively coupled only through a connecting rod pivotally connected to a pivot arm pivotally mounted on a movable pivot, the rear wheels being pivotally connected through an arm to the pivot arm.
Abstract translation: 一种用于车辆的转向装置，包括可旋转地安装在臂上的臂，其响应于方向盘的转动而可纵向移动;以及一对保持与小齿轮啮合的纵向移动齿条。 其中一个机架与车辆的前轮可操作地联接，并且具有可枢转在可移动枢轴上的枢转臂，该枢转臂可响应于车辆速度沿枢转臂移动。 另一个机架通过可枢转的杠杆联接，臂与枢转地安装在枢转臂上并与后轮可操作地联接的臂。 当方向盘转动时，取决于枢转臂上的可动枢轴的位置，前轮和后轮在相同方向或相反方向转动，该位置是车速的函数。 当车辆高速行驶时，前轮和后轮以相同的方向转动，并且当车辆以低速行驶时，前轮和后轮相反方向转动。 可以省去齿条和小齿轮，并且前轮仅通过可枢转地连接到可枢转地安装在可动枢轴上的枢转臂的连杆操作地联接，后轮通过臂枢转地连接到枢转臂。
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公开(公告)号：US20240199116A1
公开(公告)日：2024-06-20
申请号：US18462028
申请日：2023-09-06
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Hayato YOSHINO , Kimiaki ONO
IPC: B62D7/15
CPC classification number: B62D7/1545 , B62D7/159
Abstract: A steering system for a vehicle includes: an operation member operable by a driver; a front-wheel steering device to which the operation member is connected to enable a front wheel to be steered by a steering amount; a rear-wheel steering device configured to steer a rear wheel independently of the front wheel; and a controller configured to control the front-wheel and rear-wheel steering devices. The controller executes a front-wheel steering force application control to apply, to the front wheel, a steering force including, as a component thereof, a driving support force that causes the vehicle to travel along a target travel line. The controller determines, in the front-wheel steering force application control, the driving support force based on a target operation amount that is the operation amount of the operation member to cause the vehicle to travel along the target travel line and a steering amount of the rear wheel.
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