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    • 1. 发明授权
    • Vehicle running condition judgement device
    • 车辆运行状态判断装置
    • US06308115B1
    • 2001-10-23
    • US09361996
    • 1999-07-28
    • Hiroyuki YamaguchiKatsuhiro AsanoKenji TozuTakayuki ItohAkitaka Nishio
    • Hiroyuki YamaguchiKatsuhiro AsanoKenji TozuTakayuki ItohAkitaka Nishio
    • G06F770
    • B60W40/064B60T8/172B60T2270/86B60W40/101B60W40/103B60W2550/12B62D6/04B62D7/159
    • A vehicle running condition judgment device for accurately detecting a change in a road surface condition and a vehicle's limit running condition. With substitution of respective tire characteristics and a detected state quantity into a vehicle motion model, vehicle slip angles are estimated for respective assumed road surface conditions. Based on the current state quantity and the last estimated vehicle slip angle, currently estimated vehicle slip angles for the respective assumed road surface conditions are compensated. A differential operation section calculates an estimation value of a vehicle slip angular velocity for each of the assumed road surface conditions based on the compensated vehicle slip angles for the respective assumed road surface conditions. Meanwhile, an operation section calculates a detection value of a vehicle slip angular velocity based on the detected state quantity. By comparing the detection value and the respective estimation values for the assumed road surface conditions, the current road surface condition is determined. Further, a lateral acceleration is calculated based on a vehicle slip angle, and compared with the detection value for determination of the road surface condition, and also with a predetermined limit value for determination of a vehicle's limit running condition.
    • 一种车辆行驶状态判断装置,用于准确地检测路面状况和车辆极限行驶状态的变化。 通过将各轮胎特性和检测到的状态量替换为车辆运动模型,针对相应的假定路面条件估计车辆滑行角度。 基于当前状态量和最后估计的车辆滑移角度,对各个假设路面条件的当前估计车辆滑移角进行补偿。 差分运算部根据各假定路面条件的补偿车辆滑移角,计算出各假定路面条件下的车辆滑行角速度的推定值。 同时,操作部根据检测到的状态量来计算车辆滑行角速度的检测值。 通过比较所述假设路面条件的检测值和各自的估计值,确定当前路面状况。 此外,基于车辆滑移角计算横向加速度,并且与用于确定路面状况的检测值进行比较,并且还与用于确定车辆极限行驶状态的预定极限值进行比较。
    • 2. 发明授权
    • Vehicle driving condition detection device
    • 车辆行驶状况检测装置
    • US06374172B1
    • 2002-04-16
    • US09684923
    • 2000-10-10
    • Hiroyuki YamaguchiKatsuhiro AsanoYasushi AmanoKenji TozuAkitaka Nishio
    • Hiroyuki YamaguchiKatsuhiro AsanoYasushi AmanoKenji TozuAkitaka Nishio
    • B60T824
    • B60W40/103B60T8/172B60T2210/22B60T2230/02B60W30/18172B60W2050/0028B60W2550/12B60W2550/142B62D6/04G01L5/20
    • A vehicle driving condition detection device is adapted to detect a vehicle running along a banked or laterally sloping road, as well as a lateral acceleration, and sideslip angle with good accuracy. The sideslip angle is estimated at a vehicle-body sideslip angle estimating circuit based on a steering angle &dgr;f, a lateral acceleration ÿ, a yaw rate {dot over (&thgr;)}, and a vehicle speed V. In addition, using a differentiating device, the estimated sideslip angle is differentiated to calculate a slip angular velocity. A subtracting device is provided at which a deviation is calculated between the slip angular velocity and a slip angular velocity detected at a slip angular velocity calculating circuit. The deviation can detect a banked or laterally sloping road due to the fact that the detected slip angular velocity at the slip angular velocity calculating circuit includes the gravity acceleration component that depends on the slope or bank of the road. Upon detecting a banked or sloping road, a deviation &Dgr;ÿ (={dot over (&thgr;)}·V−ÿ) is outputted from a switching device, and at a subtracting device the detected lateral acceleration ÿ is corrected by being subtracted with the deviation &Dgr;ÿ. On the basis of the resultant or corrected lateral acceleration ÿ, the vehicle-body sideslip angle is estimated. Such an estimation is made irrespective of the slope or bank of the road.
    • 车辆驾驶状况检测装置适用于检测沿着横向倾斜的道路行驶的车辆以及横向加速度和高精度的侧滑角。 在基于转向角增量,横向加速度ÿ,偏航率{点(θ))和车速V的车身侧滑角估计电路估计侧滑角。另外,使用微分装置 ,估计的侧滑角被差分以计算滑移角速度。 提供一种减法装置,在该减法装置中计算滑移角速度与在滑动角速度计算电路处检测到的滑移角速度之间的偏差。 由于在滑移角速度计算电路处检测到的滑动角速度包括取决于道路的坡度或堤岸的重力加速度分量,偏差可以检测堤岸或横向倾斜的道路。 在检测到一条倾斜的道路时,从切换装置输出偏差DELTAÿ(= {dot over(θ)} V-ÿ),在减法装置中,通过用偏差减去检测到的横向加速度ÿ DELTAÿ。 基于所得到的或校正的横向加速度is,估计车身侧滑角度。 无论道路的坡度还是堤岸,都做出这样的估计。
    • 3. 发明授权
    • Yaw rate detecting system for a vehicle
    • 车辆偏航率检测系统
    • US06324445B2
    • 2001-11-27
    • US09416524
    • 1999-10-12
    • Kenji TozuAkitaka Nishio
    • Kenji TozuAkitaka Nishio
    • B62D600
    • B60T8/172B60T2250/06
    • The present invention is directed to a yaw rate detecting system for a vehicle, which includes a yaw rate sensor for measuring a yaw rate of the vehicle. The apparatus is adapted to determine a stopped state of the vehicle, set a zero point at the yaw rate measured by the yaw rate sensor when the stopped state of the vehicle is determined, and calculate an actual yaw rate in response to an output of the yaw rate sensor, on the basis of the zero point. The actual yaw rate is calculated by subtracting the yaw rate at the zero point from the yaw rate measured by the yaw rate sensor. It may be so arranged that a desired yaw rate is set on the basis of a vehicle speed and a steering angle, and the zero point is corrected in response to a comparison of the desired yaw rate and the actual yaw rate. For example, a temporary zero point is set when the stopped state of the vehicle is determined, and a deviation between the desired yaw rate and the actual yaw rate is calculated. In this case, the actual yaw rate is calculated by subtracting the yaw rate at the temporary zero point from the yaw rate measured by the yaw rate sensor. Then, the zero point is corrected on the basis of the temporary zero point in response to the deviation.
    • 本发明涉及一种用于车辆的偏航率检测系统,其包括用于测量车辆的偏航率的横摆率传感器。 该装置适于确定车辆的停止状态,当确定车辆的停止状态时,以横摆率传感器测量的横摆率设定零点,并且响应于所述车辆的输出来计算实际横摆率 偏航率传感器,基于零点。 通过从横摆率传感器测量的横摆率减去零点处的偏航率来计算实际横摆率。 可以根据车速和转向角来设定期望的偏航角速度,并且响应于期望的横摆率和实际的横摆率的比较来校正零点。 例如,当确定车辆的停止状态并且计算期望横摆率和实际横摆率之间的偏差时,设置临时零点。 在这种情况下,通过从横摆率传感器测量的横摆率中减去临时零点处的偏航率来计算实际横摆率。 然后,基于偏差响应于临时零点来校正零点。
    • 4. 发明授权
    • Apparatus for estimating a vehicle side slip angle
    • 用于估计车辆侧滑角的装置
    • US06456920B1
    • 2002-09-24
    • US09722504
    • 2000-11-28
    • Akitaka NishioKenji Tozu
    • Akitaka NishioKenji Tozu
    • G06F1900
    • G01B21/22B60T8/17551B60T2230/02B60T2270/86B60W10/184B60W40/103B60W2040/1307B60W2050/0028B60W2520/10B60W2520/125B60W2520/14B60W2530/20
    • The present invention is directed to an apparatus for estimating a vehicle side slip angle, which includes a monitor for monitoring quantity of motion state of a vehicle including such signals as a vehicle speed, a vehicle lateral acceleration, a yaw rate and a steering angle, and includes a motion model memory for storing a vehicle motion model. A first estimation device estimates a vehicle side slip angle by calculating a vehicle side slip angular velocity on the basis of the vehicle speed, vehicle lateral acceleration and yaw rate, and integrating the vehicle side slip angular velocity in a predetermined calculating cycle. Also, a second estimation device estimates the vehicle side slip angle on the basis of the quantity of motion state monitored by the monitor, and the vehicle motion model stored in the motion model memory. A tire load determination device determines a lateral load to each tire of the vehicle on the basis of the result monitored by the monitor. And, a changing device changes between the estimation of the vehicle side slip angle made by the first estimation device and the estimation of the vehicle side slip angle made by the second estimation device, in accordance with the result of determination of the tire load determination device.
    • 本发明涉及一种用于估计车辆侧滑角的装置,其包括用于监视车辆的运动状态量的监视器,其包括诸如车辆速度,车辆横向加速度,偏航率和转向角度的信号, 并且包括用于存储车辆运动模型的运动模型存储器。 第一估计装置通过基于车速,车辆横向加速度和横摆率计算车辆侧滑角角速度,并且以预定的计算周期积分车辆侧滑角速度来估计车辆侧滑角。 此外,第二估计装置基于由监视器监视的运动状态量和存储在运动模型存储器中的车辆运动模型来估计车辆侧滑角。 轮胎负载确定装置基于由监视器监视的结果来确定车辆的每个轮胎的横向负载。 并且,根据轮胎负荷确定装置的确定结果,改变装置在由第一估计装置产生的车辆侧滑角的估计和由第二估计装置产生的车辆侧滑角的估计之间改变 。
    • 5. 发明授权
    • Brake control system for a vehicle
    • US06422660B1
    • 2002-07-23
    • US09782156
    • 2001-02-14
    • Kenji TozuAkitaka Nishio
    • Kenji TozuAkitaka Nishio
    • B60T844
    • The present invention is directed to a brake control system, which includes wheel brake cylinders, a master cylinder, a reservoir communicated with the wheel brake cylinders, normally open solenoid valves disposed between the master cylinder and the wheel brake cylinders, respectively, normally closed solenoid valves disposed between the wheel brake cylinders and the reservoir, respectively, a hydraulic pump for supplying the brake fluid to a passage for connecting the master cylinder with the normally open valves, and an automatically pressurizing device (e.g., a vacuum booster with a changeover valve) which is provided for advancing the master piston irrespective of operation of the pump and the brake pedal to generate hydraulic braking pressure from the master cylinder. It is so controlled that a distance of the master piston, which is advanced by the automatically pressurizing device when all of the normally open valves are closed during the hydraulic pressure control of the wheel brake cylinders, is greater than the distance of the master piston, which is advanced by the automatically pressurizing device when at least one of the normally open valves is open during the hydraulic pressure control of the wheel brake cylinders.
    • 6. 发明授权
    • Vehicle motion control system
    • 车辆运动控制系统
    • US06390568B1
    • 2002-05-21
    • US09609710
    • 2000-06-30
    • Kenji TozuAkitaka Nishio
    • Kenji TozuAkitaka Nishio
    • B60T712
    • B60T8/4881
    • A vehicle motion control system which generates a minimized switching noise when a hydraulic pressure control valve is switched. The vehicle motion control system includes an automatic hydraulic pressure generator generating a hydraulic pressure irrespective of a brake pedal operation and a hydraulic pressure control valve adjusting the hydraulic brake pressure by opening or blocking a connection between the automatic hydraulic pressure generator and a wheel brake cylinder, and performs a motion control by controlling at least the hydraulic pressure control valve in accordance with the motion of a vehicle. The vehicle motion control system has a hydraulic pressure sensor detecting a generated hydraulic pressure of the automatic hydraulic pressure generator, setting a necessary hydraulic pressure for control, and adjusting the generated hydraulic pressure of the automatic hydraulic pressure generator by controlling the automatic hydraulic pressure generator in accordance with the result of a comparison between the actually generated hydraulic pressure of the automatic hydraulic pressure generator and the necessary hydraulic pressure for the motion control.
    • 一种车辆运动控制系统,其在切换液压控制阀时产生最小化的开关噪声。 车辆运动控制系统包括:无论制动踏板操作产生液压的自动液压发生器和通过打开或阻塞自动液压发生器与车轮制动缸之间的连接来调节液压制动压力的液压控制阀, 并且通过根据车辆的运动至少控制液压控制阀来执行运动控制。 车辆运动控制系统具有液压传感器,用于检测自动液压发生器的产生的液压,设定必要的液压用于控制,并且通过控制自动液压发生器来调节自动液压发生器的产生的液压 根据实际产生的自动液压发生器的液压与用于运动控制的必要液压之间的比较的结果。
    • 8. 发明授权
    • Antiskid control device
    • 防滑控制装置
    • US5938298A
    • 1999-08-17
    • US749238
    • 1996-11-15
    • Takeshi NaitoAkitaka Nishio
    • Takeshi NaitoAkitaka Nishio
    • B60T8/58B60T8/1761B60T8/40B60T8/42
    • B60T8/4208B60T8/4045
    • The object to be achieved by the present invention is to improve accuracy in determining whether or not it is necessary to terminate antiskid control and to reduce the frequency with which the control is terminated. The solution proposed by the present invention is to stop operation of a hydraulic pump before it is determined that the antiskid control should be terminated during the duty pressure increase operation, whereby fluid pressure in a wheel brake can be raised to a level of fluid pressure in a master cylinder before it is determined that the antiskid control should be terminated, to continue the antiskid control as long as the wheel tends to be locked and to terminate the antiskid control when the wheel does not tend to be locked.
    • 本发明要实现的目的是提高确定是否需要终止防滑控制并降低控制终止频率的精度。 本发明提出的解决方案是在确定在占空比增压操作期间防止防滑控制结束之前停止液压泵的操作,由此可以将车轮制动器中的流体压力提高到液压压力的水平 在确定防滑控制应终止之前的主缸,只要轮趋于被锁定就继续防滑控制,并且当车轮不趋于锁定时终止防滑控制。