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    • 82. 发明授权
    • Anti-skid control system for a four-wheel drive vehicle
    • 四轮驱动车辆的防滑控制系统
    • US5634699A
    • 1997-06-03
    • US545334
    • 1995-10-19
    • Hiroyuki IchikawaKenji Tanaka
    • Hiroyuki IchikawaKenji Tanaka
    • B60T8/172B60T8/1763B60T8/1769B60T8/32B60T8/58
    • B60T8/322B60T8/1769B60T2210/12B60T2210/14
    • The invention is directed to an arrangement for controlling a braking force applied to each of front and rear road wheels of a four-wheel drive vehicle depending upon a braking condition, with a hydraulic braking pressure supplied to each of the wheel brake cylinders through an actuator. The actuator is controlled by a braking force controller into which output signals of wheel speed sensors are fed. On the basis of the wheel speeds detected by the sensors, a wheel acceleration of each road wheel is calculated. Also, an oscillation of a relative movement between the front and rear road wheels is determined. And, a coefficient of friction of a road is estimated in accordance with the wheel acceleration and the oscillation. For example, it is estimated that the road is of a relatively low coefficient of friction, when a mean wheel acceleration of all road wheels becomes less than a predetermined standard acceleration, and when the oscillation is caused to exceed a predetermined level. Then, the hydraulic braking pressure applied to each of the wheel brake cylinders is controlled by the braking force controller in accordance with the estimated coefficient of friction and in response to each wheel speed.
    • 本发明涉及一种用于根据制动条件来控制施加到四轮驱动车辆的前后车轮上的制动力的装置,其中通过致动器向每个车轮制动缸提供液压制动压力 。 执行器由制动力控制器控制,其中馈送有车轮速度传感器的输出信号。 基于由传感器检测到的车轮速度,计算每个车轮的车轮加速度。 此外,确定前轮和后轮之间的相对运动的振荡。 并且,根据车轮加速度和振动来估计道路的摩擦系数。 例如,当所有车轮的平均车轮加速度小于预定的标准加速度,并且当使振荡超过预定水平时,估计道路具有相对较低的摩擦系数。 然后,根据估计的摩擦系数和响应于每个车轮速度,由制动力控制器控制施加到每个车轮制动缸的液压制动压力。
    • 85. 发明授权
    • Anti-skid apparatus for automotive vehicle
    • 汽车防滑装置
    • US5461565A
    • 1995-10-24
    • US929408
    • 1992-08-14
    • Shinsuke SakaneHiroyuki IchikawaNobuyasu NakanishiTatsuo Sugitani
    • Shinsuke SakaneHiroyuki IchikawaNobuyasu NakanishiTatsuo Sugitani
    • B60T8/58B60T8/1761B60T8/64B60T8/60
    • B60T8/17616
    • An anti-skid apparatus for installation in a vehicle braking system includes an electrically operated actuator arranged to control hydraulic brake pressure applied to each wheel brake cylinder of road wheels of the vehicle and an electronic control device for applying an electric control signal to the actuator in response to electric signals indicative of each rotational speed of the road wheels so that the actuator is operated to decrease or increase the brake pressure when the rotational speed of the road wheels in braking operation becomes lower than a reference speed the value of which is defined on a basis of a travel, speed of the vehicle. The electronic control device is designed to detect a step on a travel road of the vehicle in braking operation and to compare the rotational speed of the road wheels with a subtracted value of the reference speed when the step on the travel road has been detected within a predetermined time thereby to maintain the actuator in its deactivated condition when the rotational speed of the road wheels is larger than the subtracted value of the reference speed.
    • 用于安装在车辆制动系统中的防滑装置包括:电动致动器,其被布置成控制施加到车辆的车轮的每个车轮制动缸的液压制动压力;以及电子控制装置,用于向致动器施加电控制信号 响应于指示车轮的每个转速的电信号,使得当制动操作中的车轮的转速变得低于其值定义在其上的参考速度时,致动器被操作以降低或增加制动压力 旅行的基础,车辆的速度。 电子控制装置被设计成在制动操作中检测车辆的行驶道路上的台阶,并且当在行驶道路中的步骤已被检测到时,将车轮的转速与基准速度的减去值进行比较 预定时间,从而当车轮的转速大于参考速度的减去值时,将致动器保持在停用状态。
    • 88. 发明授权
    • Anti-skid brake control system based on acceleration detection
    • 基于加速度检测的防滑制动控制系统
    • US5280432A
    • 1994-01-18
    • US562991
    • 1990-08-06
    • Kazutaka KuwanaKuniaki OkamotoTsuyoshi YoshidaHiroyuki IchikawaMasaru KamikadoNobuyasu NakanishiTatsuo SugitaniKazunori Sakai
    • Kazutaka KuwanaKuniaki OkamotoTsuyoshi YoshidaHiroyuki IchikawaMasaru KamikadoNobuyasu NakanishiTatsuo SugitaniKazunori Sakai
    • B60T8/58B60T8/1761B60T8/32B60T8/34B60T8/42B60T8/66B60T8/60
    • B60T8/344B60T8/17616B60T8/328B60T8/4225
    • The anti-skid control system is constructed with a brake fluid pressure source for generating brake fluid pressure at high and low levers, a switching valve feeding either high pressure or low pressure to the wheel cylinders, a wheel velocity detecting device sensing the driving wheel rotating speed, an acceleration detecting device detecting the vehicle acceleration and a first arithmetic operation device for finding the estimated vehicle speed and the wheel rotating acceleration based on the wheel velocity detected by the wheel velocity detecting device and the vehicle body acceleration detected by the acceleration detecting device. A brake fluid pressure controlling device is provided for increasing, decreasing or maintaining the brake fluid pressure in the wheel cylinders, controlling the switching valve on the basis of wheel velocity, estimated vehicle speed, and wheel rotating acceleration. A second arithmetic operation device marks the minimum and maximum values in the wheel velocity after a brake fluid pressure reduction based on the wheel velocity detected by the wheel velocity detecting device calculates the recovery acceleration in the wheel velocity in the shift from the minimum value to the maximum value and compares the recovery acceleration with the set value. A vehicle acceleration correcting device corrects the vehicle body acceleration detected by the acceleration detecting device so as to set the vehicle body acceleration at a smaller value in case the recovery acceleration is less than the set value.
    • 防滑控制系统由制动液压源构成,用于在高低杆处产生制动液压,向轮缸供给高压或低压的切换阀;轮速检测装置,用于感测驱动轮旋转 速度,检测车辆加速度的加速度检测装置和用于根据由车轮速度检测装置检测的车轮速度和由加速度检测装置检测到的车体加速度来求出车速和车轮旋转加速度的第一算术运算装置 。 提供制动液压力控制装置,用于增加,减少或维持轮缸中的制动液压,根据车轮速度,估计车速和车轮转速加速度来控制切换阀。 第二算术运算装置在基于由车轮速度检测装置检测出的车轮速度的制动液压降低后的车轮速度中标记最小值和最大值,计算从最小值到最小值的车轮速度的恢复加速度 最大值,并将恢复加速度与设定值进行比较。 车辆加速度校正装置校正由加速度检测装置检测到的车体加速度,以便在恢复加速度小于设定值的情况下将车身加速度设定为较小的值。
    • 89. 发明授权
    • Anti-skid control system for an automotive vehicle that includes an
arrangement for varying the braking pressure and the braking pressure
hold time
    • 用于汽车的防滑控制系统,其包括改变制动压力和制动压力保持时间的布置
    • US5220506A
    • 1993-06-15
    • US612998
    • 1990-11-15
    • Kazutaka KuwanaTsuyoshi YoshidaHiroyuki IchikawaKenji Tozu
    • Kazutaka KuwanaTsuyoshi YoshidaHiroyuki IchikawaKenji Tozu
    • B60T8/1755B60T8/1761B60T8/66B60T8/70
    • B60T8/17616B60T2240/08
    • The invention is directed to an anti-skid control system for controlling a braking force applied to a road wheel with a hydraulic braking pressure supplied to a wheel brake cylinder through pressure control means. On the basis of a wheel speed of the road wheel detected by detecting means, a wheel acceleration and an estimated vehicle speed are calculated. A difference between the wheel speed and the estimated vehicle speed is calculated, and an integrated value thereof during a certain period is obtained. Then, a wheel lock rate indicative of a locking condition of the road wheel is set on the basis of the integrated value at least. Means is provided for setting an increasing time for increasing the hydraulic braking pressure and a holding time for holding it as it is with a proportion therebetween determined in response to a relationship between the wheel acceleration and the wheel lock rate, or setting a decreasing time and the holding time as well. The pressure control means is arranged to alternately increase and hold the hydraulic braking pressure in response to the increasing time and holding time, or decrease and hold it as well.
    • 本发明涉及一种防滑控制系统,用于通过压力控制装置以提供给车轮制动缸的液压制动压力来控制施加到车轮的制动力。 基于由检测装置检测到的车轮的车轮速度,计算车轮加速度和估计车速。 计算车轮速度和车速估计值之间的差异,并且获得在一定时间段内的积分值。 然后,基于积分值至少设定表示车轮的锁定状态的车轮锁定率。 提供了用于设定增加液压制动压力的增加时间的装置和用于保持液压制动压力的保持时间,并且其保持时间是根据车轮加速度和车轮锁定速度之间的关系确定的比例,或者设定减少的时间和 持有时间以及。 压力控制装置被布置成响应于增加的时间和保持时间交替地增加和保持液压制动压力,或者减小并保持。