公开(公告)号：US5135067A

公开(公告)日：1992-08-04

申请号：US563413

申请日：1990-08-06

申请人： Takashi Kohata ,  Masaru Abe ,  Ikuo Nonaga

发明人： Takashi Kohata ,  Masaru Abe ,  Ikuo Nonaga

IPC分类号： B62D5/04 ,  B62D7/14 ,  B62D15/02

CPC分类号： B62D15/0225 ,  B62D5/0427

摘要： An electric power steering system which additionally includes a radial arm extending from a steering rod, an axial shaft extending in parallel with the axial center line of the steering rod, an axial bore formed in the casing of the system for guiding axial movement of the axial shaft substantially without any play, and a spring member urging the axial shaft against a side wall of the axial bore. Thus, rotation of the steering rod around its axial center line may be prevented with a relatively small force. Therefore, no excessive force needs to be applied to the axial shaft, and the axial shaft would not encounter any substantial resistance to its axial movement. The axial shaft may be provided with a groove extending along one side thereof in parallel with the axial central line of the axial shaft and provided with a bottom surface which slopes along its lengthwise direction, and the casing may support a steering rod displacement sensor having a spring-loaded retractable plunger serving as a measuring end and abutting the sloping bottom surface of the groove. Thus, the steering rod displacement sensor may be provided with a simple structure which makes it suitable to be mounted in a very limited space in the power steering system. If desired, the steering rod displacement sensor may also serve as the spring member for removing play between the axial shaft and its axial bore. This electric power steering system is suitable for use in front and rear wheel steering vehicles.

摘要翻译： 一种电动助力转向系统，其还包括从转向杆延伸的径向臂，与转向杆的轴向中心线平行延伸的轴向轴，该轴向孔形成在系统的壳体中，用于引导轴向的轴向运动 基本上没有任何游隙的轴，以及将轴向轴推动抵靠轴向孔的侧壁的弹簧构件。 因此，可以用较小的力来防止转向杆围绕其轴向中心线的转动。 因此，不需要对轴向轴施加过大的力，并且轴向轴不会对其轴向运动产生任何实质的阻力。 轴向轴可以具有与轴向轴的轴向中心线平行的一侧延伸的槽，并且具有沿其长度方向倾斜的底面，并且壳体可以支撑转向杆位移传感器，该转向杆位移传感器具有 用作测量端的弹簧加载的可伸缩柱塞并且抵靠凹槽的倾斜底表面。 因此，转向杆位移传感器可以设置有使其适于安装在动力转向系统中非常有限的空间中的简单结构。 如果需要，转向杆位移传感器还可以用作用于消除轴向轴与其轴向孔之间的间隙的弹簧构件。 该电动助力转向系统适用于前轮和后轮转向车。

公开(公告)号：US4939653A

公开(公告)日：1990-07-03

申请号：US226070

申请日：1988-07-29

申请人： Osamu Tsurumiya ,  Masaru Abe ,  Yoshimichi Kawamoto ,  Takashi Kohata ,  Ikuo Nonaga ,  Masataka Izawa

发明人： Osamu Tsurumiya ,  Masaru Abe ,  Yoshimichi Kawamoto ,  Takashi Kohata ,  Ikuo Nonaga ,  Masataka Izawa

IPC分类号： B62D7/14 ,  B62D7/15

CPC分类号： B62D7/148 ,  B62D7/1581 ,  B62D7/159

摘要： The steering operation of a motor vehicle with steerable front and rear road wheels is controlled by steering the rear road wheels with an actuator such as an electric motor which produces a steering force dependent on a deviation of the actual rear wheel steering angle from a target rear wheel steering angle. The rear road wheels are thus controlled with a characteristic dependent on the coefficient of friction of a road on which the motor vehicle travels and the steering speed at which the motor vehicle is steered. Typically, a steering control method comprises the steps of detecting the steering angle of the front road wheels, determining a target steering angle for the rear wheels based on the steering angle of the front road wheels, detecting the actual steering angle of the rear road wheels, calculating a steering angle deviation of the actual rear wheel steering angle from the target steering angle, determining a rear wheel steering force based on the steering angle deviation, and steering the rear road wheels to the target steering angle with the determined rear wheel steering force.

摘要翻译： 具有可转向的前轮和后轮的机动车辆的转向操作通过用诸如电动机的致动器转向后轮来控制，该电动机产生取决于实际后轮转向角与目标后方的偏差的转向力 车轮转向角。 因此，后轮车轮的控制特性取决于机动车辆行驶的道路的摩擦系数和机动车辆转向的转向速度。 通常，转向控制方法包括以下步骤：检测前轮的转向角，基于前轮的转向角确定后轮的目标转向角，检测后轮的实际转向角 计算出实际后轮转向角与目标转向角的转向角偏差，基于转向角偏差来确定后轮转向力，并且通过所确定的后轮转向力将后轮转向目标转向角 。

公开(公告)号：US5234068A

公开(公告)日：1993-08-10

申请号：US777591

申请日：1991-10-16

申请人： Takashi Kohata ,  Masaru Abe ,  Ikuo Nonaga

发明人： Takashi Kohata ,  Masaru Abe ,  Ikuo Nonaga

IPC分类号： B62D5/04 ,  B62D15/02

CPC分类号： B62D15/0225 ,  B62D5/0427

摘要： An electric power steering system which additionally includes a radial arm extending from a steering rod, an axial shaft extending in parallel with the axial center line of the steering rod, an axial bore formed in the casing of the system for guiding axial movement of the axial shaft substantially without any play, and a spring member urging the axial shaft against a side wall of the axial bore. Thus, rotation of the steering rod around its axial center line may be prevented with a relatively small force. Therefore, no excessive force needs to be applied to the axial shaft, and the axial shaft would not encounter any substantial resistance to its axial movement. The axial shaft may be provided with a groove extending along one side thereof in parallel with the axial central line of the axial shaft and provided with a bottom surface which slopes along its lengthwise direction, and the casing may support a steering rod displacement sensor having a spring-loaded retractable plunger serving as a measuring end and abutting the sloping bottom surface of the groove. Thus, the steering rod displacement sensor may be provided with a simple structure which makes it suitable to be mounted in a very limited space in the power steering system. If desired, the steering rod displacement sensor may also serve as the spring member for removing play between the axial shaft and its axial bore. This electric power steering system is suitable for use in front and rear wheel steering vehicles.

摘要翻译： 一种电动助力转向系统，其还包括从转向杆延伸的径向臂，与转向杆的轴向中心线平行延伸的轴向轴，该轴向孔形成在系统的壳体中，用于引导轴向的轴向运动 基本上没有任何游隙的轴，以及将轴向轴推动抵靠轴向孔的侧壁的弹簧构件。 因此，可以用较小的力来防止转向杆围绕其轴向中心线的转动。 因此，不需要对轴向轴施加过大的力，并且轴向轴不会对其轴向运动产生任何实质的阻力。 轴向轴可以具有与轴向轴的轴向中心线平行的一侧延伸的槽，并且具有沿其长度方向倾斜的底面，并且壳体可以支撑转向杆位移传感器，该转向杆位移传感器具有 用作测量端的弹簧加载的可伸缩柱塞并且抵靠凹槽的倾斜底表面。 因此，转向杆位移传感器可以设置有使其适于安装在动力转向系统中非常有限的空间中的简单结构。 如果需要，转向杆位移传感器还可以用作用于消除轴向轴与其轴向孔之间的间隙的弹簧构件。 该电动助力转向系统适用于前轮和后轮转向车。

公开(公告)号：US5189616A

公开(公告)日：1993-02-23

申请号：US616408

申请日：1990-11-21

申请人： Osamu Tsurumiya ,  Masataka Izawa ,  Masaru Abe ,  Ikuo Nonaga

发明人： Osamu Tsurumiya ,  Masataka Izawa ,  Masaru Abe ,  Ikuo Nonaga

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

CPC分类号： B62D7/1581 ,  B62D7/159

摘要： A four-wheel steering system for a motor vehicle steers motor vehicle rear wheels based on a steering angle ratio between front and rear wheels based on a vehicle speed, and a front wheel steering angle. The steering angle ratio is of a negative value or a relatively small positive value when the vehicle speed is in a medium speed range or a high speed range and the front wheel steering angle is in a relatively small range. The motor vehicle is controlled to turn well when the front wheel steering angle is in the relative small range while the motor vehicle is running in the medium and high speed ranges.

摘要翻译： 用于机动车辆的四轮转向系统基于车速和前轮转向角度，基于前轮和后轮之间的转向角比来转向机动车辆后轮。 当车速处于中速范围或高速范围并且前轮转向角处于相对小的范围内时，转向角比为负值或相对较小的正值。 当机动车辆在中等速度范围内行驶时，前轮转向角度处于相对较小的范围内，机动车被控制得很好。

公开(公告)号：US5365440A

公开(公告)日：1994-11-15

申请号：US800070

申请日：1991-11-27

申请人： Masaru Abe ,  Yoshimichi Kawamoto ,  Ikuo Nonaga ,  Masataka Izawa

发明人： Masaru Abe ,  Yoshimichi Kawamoto ,  Ikuo Nonaga ,  Masataka Izawa

IPC分类号： B62D6/00 ,  B62D7/14 ,  B62D7/15 ,  B62D101/00 ,  B62D113/00 ,  B62D117/00

CPC分类号： B62D7/159 ,  B62D7/1581

摘要： A four wheel steering system for a motor vehicle with steerable front and rear road wheels, a steering angle sensor for detecting a front wheel steering angle through which the front road wheels are steered, a vehicle speed sensor for detecting a vehicle speed of the motor vehicle, a rear wheel steering mechanism for steering the rear wheels, and a controller for controlling the rear wheel steering mechanism to steer the rear road wheels based on the detected front wheel steering angle and the detected vehicle speed when the front road wheels are steering. The controller controls the rear wheel steering mechanism to steer the rear road wheels in a direction which is opposite to the front road wheels if the detected vehicle speed is relatively low, and also controls the rear wheel steering mechanism to steer the rear road wheels in a direction which is the same as the front road wheels if the detected vehicle speed is relatively high. Furthermore, the controller controls the rear wheel steering mechanism to increase a rear wheel steering angle which through the rear road wheels are steered as the front wheel steering angle increases if a change in the front wheel steering angle is relatively small, and controls the rear wheel steering mechanism to reduce an increase in the rear wheel steering angle if a change in the front wheel steering angle is relatively large.

摘要翻译： 一种用于具有可转向的前轮和后轮的机动车辆的四轮转向系统，用于检测前轮转向的前轮转向角的转向角传感器，用于检测机动车辆的车速的车速传感器 ，用于转向后轮的后轮转向机构，以及控制器，用于根据检测到的前轮转向角和前车轮转向时的检测车速来控制后轮转向机构转向后车轮。 如果检测到的车速相对较低，则控制器控制后轮转向机构以使前后轮与前车轮相反的方向转向，并且还控制后轮转向机构以使后车轮转向 方向与前车轮相同，如果检测到的车速相对较高。 此外，如果前轮转向角的变化相对较小，则控制后轮转向机构增加后轮转向角，该后轮转向角随着前轮转向角度的增加而通过后轮转向，并且控制后轮 转向机构，如果前轮转向角的变化相对较大，则减小后轮转向角的增加。

公开(公告)号：US5199523A

公开(公告)日：1993-04-06

申请号：US369085

申请日：1989-06-20

申请人： Masaru Abe ,  Yoshimichi Kawamoto ,  Norio Ukai ,  Takashi Kohata

发明人： Masaru Abe ,  Yoshimichi Kawamoto ,  Norio Ukai ,  Takashi Kohata

IPC分类号： B62D7/14 ,  B62D7/15

CPC分类号： B62D7/1536

摘要： A front and rear wheel steering system for a vehicle which transmits a steering input from a front wheel steering gear box to a rear wheel steering gear box via a coupling shaft as a rotation thereof around its longitudinal line and varies a steering gear ratio of rear wheels to front wheels according to the speed of the vehicle. A steering rod for steering the rear wheels with its longitudinal movement is provided with a crank portion which is engaged with a swing shaft pivotally attached to the coupling shaft via a pivot shaft perpendicular thereto so as to perform a gyrating motion around an extension line of the coupling shaft and thereby move the steering rod along its longitudinal direction to achieve a steering action of the rear wheels. The steering rod can be rotated around its longitudinal line according to the vehicle speed so as to displace the crank portion relative to the extension line of the coupling shaft and change the relationship between the rotational angle of the coupling shaft or the steering input to the front wheel steering gear box and the longitudinal movement of the steering rod or the steering angle of the rear wheels.

摘要翻译： 一种用于车辆的前轮和后轮转向系统，其通过联接轴将其从前轮舵机传递到后轮舵机箱，转向输入沿其纵向线旋转，并且改变后轮的转向齿轮比 根据车辆的速度到前轮。 用于转向后轮的纵向运动的转向杆设置有曲柄部分，该曲柄部分通过与其垂直的枢转轴枢转地连接到联接轴上的摆动轴接合，以便围绕其延伸线执行旋转运动 从而使转向杆沿着其纵向方向移动，以实现后轮的转向动作。 转向杆可以根据车速绕其纵向线旋转，以使曲柄部分相对于联轴器的延长线移动，并改变联轴器或转向输入端的旋转角度与前方的关系 车轮转向齿轮箱和转向杆的纵向运动或后轮的转向角。

公开(公告)号：US4895383A

公开(公告)日：1990-01-23

申请号：US184262

申请日：1988-04-21

申请人： Masaru Abe ,  Yoshimichi Kawamoto ,  Takashi Kohata

发明人： Masaru Abe ,  Yoshimichi Kawamoto ,  Takashi Kohata

IPC分类号： B60G3/18 ,  B62D7/14 ,  B62D7/15 ,  B62D17/00

CPC分类号： B62D17/00 ,  B62D7/1545 ,  B60G2200/46

摘要： A method of and an apparatus for controlling rear road wheel camber of a four-wheel-steerable vehicle having front and rear road wheels steerable in the same or opposite directions. The camber with respect to ground of at least the rear road wheel on the outer side of a cornering curve followed by the vehicle is controlled. The apparatus includes detectors for detecting the direction in which the rear road wheels are steered with respect to the front road wheels, the self-aligning torque on the front road wheels, and the steering force acting on a steering wheel, camber varying devices associated with rear wheel suspensions, actuators for operating the camber varying devices, and a control unit responsive to detected signals from the detectors for applying a control signal to at least one of the actuators to control the camber of at least the rear road wheel on the outer side of the cornering curve when the rear wheels are steered.

摘要翻译： 一种用于控制四轮转向车辆的后轮车轮外倾的方法和装置，其具有可在相同或相反方向上转向的前轮和后轮。 控制车辆后方转弯曲线外侧至少后轮的地面的弯度。 该装置包括用于检测后轮相对于前车轮转向的方向的检测器，前车轮上的自对准转矩以及作用在方向盘上的转向力， 后轮悬架，用于操作外倾变速装置的致动器，以及响应于来自检测器的检测信号的控制单元，用于向至少一个致动器施加控制信号，以控制外侧的至少后轮的弯度 当后轮转向时的转弯曲线。

公开(公告)号：US5096014A

公开(公告)日：1992-03-17

申请号：US333870

申请日：1989-04-04

申请人： Masaru Abe ,  Toru Yasuda ,  Yoshimichi Kawamoto ,  Takashi Kohata

发明人： Masaru Abe ,  Toru Yasuda ,  Yoshimichi Kawamoto ,  Takashi Kohata

IPC分类号： B62D7/14 ,  B62D7/15

CPC分类号： B62D7/1527 ,  B62D7/148

摘要： A four-wheel-steering system includes a rear wheel steering mechanism for turning rear wheels in response to energization of an actuator. A locking device is responsive to de-energization of the actuator for locking gears and a rack shaft to prevent the rear wheels from being turned. The locking device includes a longer arm on which first and second gears are rotatably mounted, a shorter arm pivotally coupled to the longer arm, a stopper coupled to the shorter arm and engageable with the second gear, and a spring acting on the stopper for normally urging the stopper into engagement with the second gear, the actuator comprising an electric motor angularly movable with respect to the second gear.

摘要翻译： 四轮转向系统包括用于响应于致动器的通电而转动后轮的后轮转向机构。 锁定装置响应用于锁定齿轮的致动器的断电和齿条轴，以防止后轮转动。 锁定装置包括长臂，第一和第二齿轮可旋转地安装在该臂上，可枢转地连接到较长臂的较短的臂，连接到较短臂并与第二齿轮接合的止动件，以及作用在止动件上的弹簧 促使止动器与第二齿轮接合，致动器包括相对于第二齿轮成角度地运动的电动马达。

公开(公告)号：US5048629A

公开(公告)日：1991-09-17

申请号：US547354

申请日：1990-07-03

申请人： Masaru Abe ,  Takashi Kohata

发明人： Masaru Abe ,  Takashi Kohata

IPC分类号： B62D7/14 ,  B62D7/15

CPC分类号： B62D7/159

摘要： In a four-wheel steering system for steering front and rear wheels of a vehicle in opposite directions in a low vehicle speed range, a rear wheel steering method steers the rear wheels more greatly in a predetermined low vehicle speed range in which a vehicle is usually steered by large angles than in a very low vehicle speed range lower than the predetermined range. The method insures a small turn of the vehicle while suppressing a change in the radius of a turn relative to the operation of a steering wheel immediately after the start of the vehicle.

摘要翻译： 在用于在低车速范围内以相反方向转向车辆的前轮和后轮的四轮转向系统中，后轮转向方法在车辆通常在预定的低车速范围内更大地转向后轮 通过大角度转向比在低于预定范围的非常低的车速范围。 该方法在车辆开始之前相对于方向盘的操作抑制转弯半径的变化来确保车辆的小转弯。

公开(公告)号：US4823898A

公开(公告)日：1989-04-25

申请号：US170829

申请日：1988-03-21

申请人： Masami Ogura ,  Kazuhiro Seki ,  Masaru Abe ,  Mitsuya Serizawa ,  Yoshimichi Kawamoto ,  Toru Yasuda ,  Takashi Kohata

发明人： Masami Ogura ,  Kazuhiro Seki ,  Masaru Abe ,  Mitsuya Serizawa ,  Yoshimichi Kawamoto ,  Toru Yasuda ,  Takashi Kohata

IPC分类号： B62D3/00 ,  B62D5/04 ,  B62D5/06 ,  B62D7/15 ,  B62D7/22 ,  F16F15/08 ,  B62D15/00

CPC分类号： B62D7/226 ,  F16F15/08 ,  Y10T74/1967 ,  Y10T74/2147

摘要： A steering gear box mount includes a resilient member interposed between a motor vehicle body and a steering gear box for allowing movement of the steering gear box. The mount also has a structure for limiting allowed movement of the steering gear box. The structure includes a mechanism for selectively fixing the steering gear box to a motor vehicle body, or a mechanism for continuously adjusting the allowed movement of the steering gear box.

摘要翻译： 转向齿轮箱安装件包括插入在机动车体和转向齿轮箱之间的弹性构件，用于允许转向齿轮箱的移动。 安装座还具有用于限制转向齿轮箱允许的运动的结构。 该结构包括用于将转向齿轮箱选择性地固定到机动车辆的机构，或用于连续地调节转向齿轮箱允许的运动的机构。