公开(公告)号：US3847447A

公开(公告)日：1974-11-12

申请号：US26351872

申请日：1972-06-15

Applicant: BENDIX CORP

Inventor： NEEDHAM J ,  ELLIOTT D

IPC: B60T8/1763 ,  B60T8/70 ,  B60T8/12

CPC classification number: B60T8/17633

Abstract: An adaptive braking system for an automotive vehicle is disclosed which includes a single comparator which compares a deceleration signal representative of wheel deceleration with a pair of reference levels. When wheel deceleration exceeds the first reference level, the comparator generates an output signal which activates an adaptive braking valve and which also activates a timer which produces an output signal for a predetermined time period after activation of the timer. The output signal from the timer switches the comparator to the second reference level which is lower than the first reference level, maintaining the adaptive braking valve on as long as wheel deceleration exceeds the second reference level. When the timer period expires, the comparator is switched back to the first reference level, to turn off the adaptive braking valve if wheel deceleration is less than the first reference level. A mercury switch which is responsive to vehicle deceleration is provided. When the mercury switch senses vehicle braking on a low coefficient surface both of the comparator reference levels are changed by a predetermined amount, although the difference between the reference levels remains the same.

Abstract translation: 公开了一种用于机动车辆的自适应制动系统，其包括将表示车轮减速度的减速信号与一对参考水平进行比较的单个比较器。 当车轮减速度超过第一参考水平时，比较器产生一个输出信号，该输出信号激活一个自适应制动阀，并且还激活定时器，该定时器在激活定时器之后的预定时间段内产生一个输出信号。 来自定时器的输出信号将比较器切换到低于第一参考电平的第二参考电平，只要车轮减速度超过第二参考电平，保持自适应制动阀打开。 当定时器周期到期时，比较器切换回第一基准电平，如果车轮减速度小于第一参考电平，则关闭自适应制动阀。 提供了响应于车辆减速的水银开关。 当汞开关在低系数表面上感测到车辆制动时，两个比较器参考电平都被改变预定量，尽管参考电平之间的差保持不变。

公开(公告)号：US3825305A

公开(公告)日：1974-07-23

申请号：US26352072

申请日：1972-06-16

Applicant: BENDIX CORP

Inventor： KASSELMANN J ,  HICKNER G ,  HOWARD D ,  NEEDHAM J

IPC: B60T8/1761 ,  B60T8/70 ,  B60T8/12

CPC classification number: B60T8/17613

Abstract: An adaptive braking system for an automotive vehicle is disclosed which includes a speed reacquisition feature which precludes termination of a brake pressure decay cycle until the controlled wheel attains a predetermined percentage of the angular velocity at which the wheel was rotating at the time that the decay cycle was initiated. The adaptive braking system includes the usual comparator which compares wheel acceleration to a predetermined reference level and generates a signal initiating a decay cycle when the wheel decelerates in excess of the reference level. The output signal of the comparator also enables a speed memory circuit which memorizes a predetermined percentage of the wheel speed. A comparator compares the instantaneous wheel speed during the decay cycle with the memorized value, and generates a signal which may maintain the decay cycle even though the wheel reaccelerates past an acceleration reference level which would normally terminate the decay cycle.

公开(公告)号：US3778117A

公开(公告)日：1973-12-11

申请号：US3778117D

申请日：1972-02-22

Applicant: BENDIX CORP

Inventor： NEEDHAM J

IPC: B60T8/72 ,  B60T8/173 ,  B60T8/1761 ,  B60T8/12

CPC classification number: B60T8/173 ,  B60T8/17613

Abstract: An adaptive braking system for a wheeled vehicle is described which includes the usual control circuitry which senses an incipient skidding condition in a corresponding vehicle wheel and which then actuates a modulator to relieve braking pressure in the corresponding brake. The control circuitry includes a comparator which actuates the modulator and a timer circuit when wheel deceleration reaches a predetermined reference level. The timer circuit produces a signal for a predetermined time period after its initial actuation. The signal from the timer switches the reference level of the comparator and also inhibits the output of the latter after termination of the comparator output within the predetermined time period.

Abstract translation: 描述了一种用于轮式车辆的自适应制动系统，其包括通常的控制电路，其感测相应车轮中的初始打滑状态，然后致动调制器以减轻相应制动器中的制动压力。 控制电路包括：当车轮减速达到预定参考水平时致动调制器的比较器和定时器电路。 定时器电路在其初始致动之后产生预定时间段的信号。 来自定时器的信号切换比较器的参考电平，并且在预定时间段内比较器输出终止后也禁止后者的输出。