公开(公告)号：US5109694A

公开(公告)日：1992-05-05

申请号：US648330

申请日：1991-01-30

申请人： Toshio Yahagi ,  Yoshihiro Iwagawa ,  Yoichi Sugimoto ,  Tsuyoshi Satoh

发明人： Toshio Yahagi ,  Yoshihiro Iwagawa ,  Yoichi Sugimoto ,  Tsuyoshi Satoh

IPC分类号： B60T8/172 ,  B60T8/1769 ,  B60T8/24 ,  B60T8/66 ,  G01P3/56

CPC分类号： G01P3/56 ,  B60T8/172 ,  B60T2250/04

摘要： The present invention relates to a method for estimating vehicle speeds independently on front and rear wheels of a four-wheel motor vehicle on the basis of front wheel speeds and rear wheel speeds, for use as a basis for determining slip rates for front and rear wheels. According to the first method of the invention, a reference wheel speed determined by the vehicle speed as estimated from the left and right wheel speeds cannot be unnecessarily increased during turning of the vehicle. According to the second and third methods of the invention, the estimated vehicle speed largely does not deviate from the actual vehicle speed in the event of a phase difference of variants produced between the left and right wheels due to an anti-lock control during the turning of the vehicle. According to other features of the invention, corrections can be performed with respect to the inner and outer wheel differences during turning of the vehicle based on an index representative of the traveling speed, lateral acceleration of the vehicle and steering angle.

摘要翻译： 本发明涉及一种用于根据前轮速度和后轮速度独立地估计四轮机动车辆的前轮和后轮的车速的方法，用作确定前轮和后轮的滑移率的基础 。 根据本发明的第一种方法，在车辆转弯期间不会不必要地增加由从左右车轮速度估计的车速所确定的基准车轮速度。 根据本发明的第二和第三种方法，由于在转弯期间的防抱死控制，在左右车轮之间产生的变型的相位差的情况下，估计的车速很大程度上不偏离实际车辆速度 的车辆。 根据本发明的其他特征，可以基于代表行驶速度，车辆的横向加速度和转向角度的指标，相对于车辆转向期间的内轮差异和外轮差异进行校正。

公开(公告)号：US5005917A

公开(公告)日：1991-04-09

申请号：US380415

申请日：1989-07-17

申请人： Toshio Yahagi ,  Yoshihiro Iwagawa ,  Yoichi Sugimoto ,  Tsuyoshi Satoh

发明人： Toshio Yahagi ,  Yoshihiro Iwagawa ,  Yoichi Sugimoto ,  Tsuyoshi Satoh

IPC分类号： B60T8/1761 ,  B60T8/40

CPC分类号： B60T8/17613 ,  B60T8/4009

摘要： In a method of anti-lock brake control, in which when the wheel is about to become locked, a control valve is capable of controlling a braking pressure for a brake device irrespective of a braking operation. The control valve is operated to reduce the braking pressure of the brake device in order to reduce a braking force, thereby preventing the wheel from becoming locked. When the braking pressure is to be recovered, the control valve is operated to intermittently increase the braking pressure of the brake device for a given time in order to moderate the increasing of the braking force. The control of the intermittent increasing of the braking pressure is stopped when the completion of the braking operation has been detected in the course of intermittently increasing the braking pressure in recovering the braking pressure. This avoids the wasteful operation of the control valve to prevent the generation of any unwanted operational noise and a wasteful consumption of electric power.

摘要翻译： 在防抱死制动控制的方法中，当车轮即将被锁定时，无论制动操作如何，控制阀能够控制制动装置的制动压力。 操作控制阀以减小制动装置的制动压力，以便减小制动力，从而防止车轮被锁定。 当要恢复制动压力时，操作控制阀以间歇地增加制动装置的给定时间的制动压力，以缓和制动力的增加。 当在恢复制动压力时间歇性地增加制动压力的过程中检测到制动操作完成时，停止制动压力间歇性增加的控制。 这避免了控制阀的浪费操作，以防止产生任何不需要的操作噪音和浪费的电力消耗。

公开(公告)号：US5329805A

公开(公告)日：1994-07-19

申请号：US828297

申请日：1992-01-30

申请人： Toshio Yahagi ,  Yoshihiro Iwagawa ,  Yoichi Sugimoto ,  Tsuyoshi Satoh ,  Takeshi Kojima

发明人： Toshio Yahagi ,  Yoshihiro Iwagawa ,  Yoichi Sugimoto ,  Tsuyoshi Satoh ,  Takeshi Kojima

IPC分类号： B60T8/172 ,  B60T8/1764 ,  B60T8/66 ,  G01P3/56 ,  G01N19/02

CPC分类号： B60T8/172 ,  B60T8/1764 ,  G01P3/56 ,  B60T2250/04

摘要： A first vehicle body speed is calculated based on a wheel rotational speed detected in a speed sensor for an object wheel. The largest value of speeds based on the wheel rotational speeds detected in speed sensors for four wheels is corrected by a correction value based on an inner and outer wheel speed difference during the turning of a vehicle so as to calculate a second vehicle body speed for every object wheel. A higher one of the first and second vehicle body speeds is selected as an estimated vehicle body speed for use in the anti-lock control for the object wheel. This enables a substantially accurate estimation of an estimated vehicle body speed during the turning of the vehicle.

摘要翻译： 基于在物轮的速度传感器中检测到的车轮转速来计算第一车体速度。 基于在四个车轮的速度传感器中检测到的车轮转速的最大速度值通过基于车辆转弯期间的内轮和外轮速度差的校正值来校正，以便为每个车辆计算第二车体速度 物轮 选择第一和第二车体速度中较高的一个作为用于对象车轮的防抱死控制的估计车身速度。 这使得能够在车辆转动期间估计车身速度的基本准确的估计。

公开(公告)号：US5065327A

公开(公告)日：1991-11-12

申请号：US383490

申请日：1989-07-24

申请人： Toshio Yahagi ,  Yoshihiro Iwagawa ,  Yoichi Sugimoto ,  Tsuyoshi Satoh

发明人： Toshio Yahagi ,  Yoshihiro Iwagawa ,  Yoichi Sugimoto ,  Tsuyoshi Satoh

IPC分类号： B60T8/1761 ,  B60T8/66 ,  G01P3/50

CPC分类号： B60T8/17616 ,  G01P3/50 ,  B60T2250/04

摘要： The present invention is a method for estimating the speed of a vehicle with antilock brake devices by obtaining a vehicle speed as a reference value for determining a slip ratio of a wheel based upon a wheel speed, an acceleration and a deceleration. At least the deceleration is based upon a differentiated value of a highest wheel speed from all wheels. In a vehicle in which the drive wheels are rigidly coupled, at least the deceleration is based upon a differentiated value of a highest value of the lowest wheel speed of the drive wheels and the wheel speeds of the driven wheels.

摘要翻译： 本发明是一种通过以车轮速度，加速度和减速度为基础，以车速作为基准值来确定车轮的滑移比来估计具有防抱死制动装置的车辆的速度的方法。 至少减速度基于来自所有车轮的最高车轮速度的微分值。 在驱动轮刚性联接的车辆中，至少减速度是基于驱动轮的最低车轮速度的最高值和从动轮的车轮速度的微分值。

公开(公告)号：US20050159867A1

公开(公告)日：2005-07-21

申请号：US10991652

申请日：2004-11-08

申请人： Nobuyuki Imaizumi ,  Yoshihiro Iwagawa ,  Susumu Ohta ,  Kazunari Okada ,  Hironobu Kiryu ,  Kazuya Sakurai ,  Masakazu Shiraishi ,  Tomoaki Sugano ,  Toshio Yahagi

发明人： Nobuyuki Imaizumi ,  Yoshihiro Iwagawa ,  Susumu Ohta ,  Kazunari Okada ,  Hironobu Kiryu ,  Kazuya Sakurai ,  Masakazu Shiraishi ,  Tomoaki Sugano ,  Toshio Yahagi

IPC分类号： B60T8/1755 ,  B60T8/96 ,  G05D1/00

CPC分类号： B60T8/1755 ,  B60T2201/16

摘要： A turning motion control system for a vehicle includes an actuator, and an actuator control device for controlling the actuator so that an actual turning motion state of the vehicle becomes close to a target turning motion state. The actuator control device is designed so that its control-permitted state and its control-stopped state can be switched from one to another through a switching device operated by a driver. When an air-pressure decreased state detecting device has detected an air-pressure decreased state, the actuator control device carries out the control of the operation of the actuator, irrespective of a switching mode of the switching device. Thus, even if an air-pressure decrease or an abnormality is generated in any of wheels in a state in which the turning motion control by the actuator has been stopped, the stability of the vehicle can be ensured.

摘要翻译： 用于车辆的转动运动控制系统包括致动器和用于控制致动器的致动器控制装置，使得车辆的实际转动运动状态变得接近目标转动运动状态。 致动器控制装置被设计成使得其控制允许状态和其控制停止状态可以通过由驾驶员操作的开关装置从一个切换到另一个状态。 当气压降低状态检测装置已经检测到气压降低状态时，执行器控制装置执行致动器的操作的控制，而与切换装置的切换模式无关。 因此，即使在执行器的转动运动控制已经停止的状态下，在任何车轮中产生气压降低或异常，可以确保车辆的稳定性。

公开(公告)号：US4971174A

公开(公告)日：1990-11-20

申请号：US325214

申请日：1989-03-17

申请人： Masaru Abe ,  Takashi Kohata ,  Toshio Yahagi ,  Yoshihiro Iwagawa

发明人： Masaru Abe ,  Takashi Kohata ,  Toshio Yahagi ,  Yoshihiro Iwagawa

IPC分类号： B60T8/172 ,  B60T8/1755 ,  B60T8/1763 ,  B60T8/32 ,  B60T8/58 ,  B62D7/14 ,  B62D7/15

CPC分类号： B60T8/1755 ,  B60T8/32 ,  B62D7/148 ,  B62D7/1581 ,  B62D7/159 ,  B60T2260/022

摘要： A four-wheel steering motor vehicle adapted to prevent a steering ratio of the rear wheels to the front wheels from varying at the time of sudden braking when the pressure of a brake liquid is reduced by an antilock brake unit. This vehicle includes a front wheel steering unit for steering the front wheels in accordance with angular movement of a steering wheel, a rear wheel steering unit for steering the rear wheels, steering control unit for determining a target steering angle of the respective rear wheels based on a vehicle speed and a front wheel steering angle and for controlling the rear wheel steering unit in such a manner that the rear wheel steering unit steers the rear wheel until a rear wheel steering angle reaches the target value, an antilock brake unit for calculating a slip coefficient of each wheel based on a sensed rotating speed of each wheel and for reducing the pressure of a brake liquid being supplied to a brake of the individual wheel when the slip coefficient of the wheel exceeds a predetermined value. The steering control unit controls the rear wheel steering unit so as to substantially prevent the rear wheel steering angle from varying when the pressure to the brake liquid is reduced by the antilock brake unit.

摘要翻译： 适用于防止后轮与前轮的转向比在制动液体的压力由防抱死制动单元减少时在突然制动时变化的四轮转向机动车辆。 该车辆包括：前轮转向单元，用于根据方向盘的角度运动来转向前轮;后轮转向单元，用于转向后轮;转向控制单元，用于基于以下方式确定各个后轮的目标转向角 车速和前轮转向角，并且用于控制后轮转向单元，使得后轮转向单元转向后轮直到后轮转向角达到目标值，用于计算滑差的防抱死制动单元 基于每个车轮的感测转速的每个车轮的系数，并且当车轮的滑移系数超过预定值时，用于减小供给到各个车轮的制动器的制动液体的压力。 转向控制单元控制后轮转向单元，以便当通过防抱死制动单元减小制动液的压力时，基本上防止后轮转向角变化。

公开(公告)号：US4929036A

公开(公告)日：1990-05-29

申请号：US369887

申请日：1989-06-22

申请人： Yoshihiro Iwagawa ,  Toshio Yahagi ,  Etsuo Fujii

发明人： Yoshihiro Iwagawa ,  Toshio Yahagi ,  Etsuo Fujii

IPC分类号： B60T8/42

CPC分类号： B60T8/4233

摘要： A hydraulic brake pressure control device for a vehicle including a casing having first and second cylinder portions in coaxial arrangement and a pillar-like cylinder projecting portion which projects into the first cylinder portion. A piston is disposed in the casing having first and second piston portions which are connected together and slidably fitted in the first and second cylinder portions, repsectively. A third cylinder portion in the piston is slidably fitted around the projecting portion. A spring is provided in the casing urging the piston in one direction. A control chamber is defined in the first cylinder portion and exerts, upon introduction of a liquid pressure thereinto, a pressing force onto the piston in the opposite direction. An input hydraulic pressure chamber is defined within the first and second cylinder portions to apply a pressing force to the piston in the one direction with a hydraulic pressure introduced thereinto and an output hydraulic pressure chamber is further defined in the third cylinder portion for exerting a pressing force to the piston in the opposite direction with an introduced hydraulic pressure. An oil passage is in the piston for communicating the input and output hydraulic pressure chambers. A valve mechanism is provided for closing the passage in response to movement of the piston in the opposite direction. This allows the pressure receiving area of the piston exposed to the input chamber to be easily made small irrespective of the provision of the valve mechanism, improving the piston responsiveness and making the whole device compact.

摘要翻译： 一种用于车辆的液压制动器压力控制装置，包括具有同轴布置的第一和第二气缸部分的壳体和突出到第一气缸部分中的柱状气缸突出部分。 活塞设置在壳体中，其具有连接在一起并可滑动地装配在第一和第二气缸部分中的第一和第二活塞部分。 活塞中的第三圆筒部可滑动地装配在突出部分周围。 弹簧设置在壳体中沿一个方向推动活塞。 控制室被限定在第一气缸部分中，并且在其中引入液体压力时，沿相反方向施加到活塞上的按压力。 输入液压室限定在第一和第二气缸部分内，以一个方向向活塞施加压力，其中液压被引入其中，并且输出液压室进一步限定在第三气缸部分中以施加压力 在引入的液压下，向相反方向对活塞施力。 用于连通输入和输出液压室的活塞中的油通道。 提供阀机构，用于响应于活塞沿相反方向的运动而关闭通道。 这允许暴露于输入室的活塞的压力接收面积容易地变小，而不管提供阀机构，提高活塞响应性并使整个装置紧凑。

公开(公告)号：US4802711A

公开(公告)日：1989-02-07

申请号：US148674

申请日：1988-01-26

申请人： Tetsuji Muto ,  Shohei Matsuda ,  Yoshihiro Iwagawa ,  Toshio Yahagi

发明人： Tetsuji Muto ,  Shohei Matsuda ,  Yoshihiro Iwagawa ,  Toshio Yahagi

IPC分类号： B60T8/172 ,  B60T8/1761 ,  B60T8/1763 ,  B60T8/58 ,  B60T8/66 ,  B60T8/70

CPC分类号： B60T8/58 ,  B60T8/17616

摘要： A signal value on the basis of a lower wheel speed is compared with a signal value on the basis of a high wheel speed and, when the difference therebetween is larger than a predetermined value, a higher vehicle speed of two previously estimated vehicle speeds is used for anti-lock control and a reference value with which a wheel speed will be compared is derived from such vehicle speed. Thus, a range of condition for judging that wheels of a vehicle are about to be locked is enlarged.

公开(公告)号：US20070239334A1

公开(公告)日：2007-10-11

申请号：US11809032

申请日：2007-05-31

申请人： Nobuyuki Imaizumi ,  Yoshihiro Iwagawa ,  Susumu Ohta ,  Kazunari Okada ,  Hironobu Kiryu ,  Kazuya Sakurai ,  Masakazu Shiraishi ,  Tomoaki Sugano ,  Toshio Yahagi

发明人： Nobuyuki Imaizumi ,  Yoshihiro Iwagawa ,  Susumu Ohta ,  Kazunari Okada ,  Hironobu Kiryu ,  Kazuya Sakurai ,  Masakazu Shiraishi ,  Tomoaki Sugano ,  Toshio Yahagi

IPC分类号： B62D6/00

CPC分类号： B60T8/1755 ,  B60T2201/16

摘要： A turning motion control system for a vehicle includes an actuator, and an actuator control device for controlling the actuator so that an actual turning motion state of the vehicle becomes close to a target turning motion state. The actuator control device is designed so that its control-permitted state and its control-stopped state can be switched from one to another through a switching device operated by a driver. When an air-pressure decreased state detecting device has detected an air-pressure decreased state, the actuator control device carries out the control of the operation of the actuator, irrespective of a switching mode of the switching device. Thus, even if an air-pressure decrease or an abnormality is generated in any of wheels in a state in which the turning motion control by the actuator has been stopped, the stability of the vehicle can be ensured.

公开(公告)号：US5174635A

公开(公告)日：1992-12-29

申请号：US763011

申请日：1991-09-20

申请人： Naotoshi Tamai ,  Yoichi Sugimoto ,  Yoshihiro Iwagawa ,  Kougyoku Go

发明人： Naotoshi Tamai ,  Yoichi Sugimoto ,  Yoshihiro Iwagawa ,  Kougyoku Go

IPC分类号： B60T8/1766 ,  B60T8/26 ,  B60T8/40 ,  B60T8/42

CPC分类号： B60T8/266 ,  B60T8/265 ,  B60T8/4225

摘要： In a hydraulic braking pressure control system for a rear wheel brake wherein a control piston normally works to provide a hydraulic braking pressure control by cooperation with a cut-off valve interposed between an input chamber leading to a master cylinder and an output chamber leading to a wheel cylinder of the brake, the cut-off valve has a valve seat piston whose pressure-receiving area facing the output chamber is larger than the pressure-receiving area facing the output chamber. This ensures that opening and closing of the cut-off valve can be repeated in accordance with the output pressure from the master cylinder, so that the output pressure from the master cylinder can be reduced and applied to the brake wheel cylinder. When the control hydraulic pressure is lost, the control piston and sleeve can be moved in a direction to increase the volume of the output chamber thereby to close the lock valve and tightly close a control chamber between the control piston and sleeve, while restraining by a stopper the movement of the cut-off valve following in a closing direction of the control piston and sleeve. This makes it possible to insure a hydraulic braking pressure applied to the brake wheel cylinder.