公开(公告)号：US3746402A

公开(公告)日：1973-07-17

申请号：US3746402D

申请日：1972-06-29

Applicant: BENDIX CORP

Inventor： HICKNER G ,  HENDRICKSON R

IPC: B60T8/42 ,  B60T8/50 ,  B60T8/00

CPC classification number: B60T8/5093 ,  B60T8/425

Abstract: An adaptive braking system is disclosed which includes the usual modulator operated by a fluid motor which is responsive to an output signal from an electronic control unit to relieve braking pressure in the vehicle''s brakes. The system further includes a valve which is responsive to the fluid pressure level actuating the vehicle''s brakes to vary the rate at which the braking pressure communicated to the vehicle''s brakes is relieved by controlling the rate at which fluid pressure is communicated to the fluid motor which operates the modulator. This feature provides a relatively low decay rate when the braking pressure communicated to the brake of the vehicle at the time the modulator is actuated is high, and a much faster decay rate when the pressure level communicated to the brakes of the vehicle upon actuation of the modulator is relatively low. Since relatively high fluid pressures will have been communicated to the vehicle''s brakes upon actuation of the modulator when the vehicle is traversing a surface having a relatively high coefficient of friction, and much lower fluid pressure levels will be communicated to the vehicle''s brakes at the time the modulator is actuated when the vehicle is traversing low coefficient surfaces, the adaptive braking system disclosed herein will provide a high decay rate on low coefficient surfaces and a much lower decay rate on high coefficient surfaces.

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：US3734572A

公开(公告)日：1973-05-22

申请号：US3734572D

申请日：1970-12-07

Applicant: BENDIX CORP

Inventor： HICKNER G ,  SLAVIN M

IPC: B60T8/1763 ,  B60T8/12

CPC classification number: B60T8/17633 ,  Y10S303/05

Abstract: A control portion of an adaptive braking system utilizing peak wheel deceleration to prevent the skidding of an automotive vehicle. The control portion assumes the vehicle is operating on a high coefficient surface for a first cycle of brake pressure modulation. After the first cycle of modulation, if the vehicle is operating on a low coefficient surface, appropriate logic will change the allowable percent slip to a lower value. Along with the initial high coefficient surface condition for the first cycle of brake pressure modulation is included a means to memorize the initial speed upon applying the vehicle brakes. The braked wheel is brought back to a given percentage of the initial speed by further decay of brake pressure during the first cycle of modulation.

Abstract translation: 利用峰值车轮减速以防止机动车辆的打滑的自适应制动系统的控制部分。 控制部分假设车辆在制动压力调制的第一周期的高系数表面上操作。 在第一个调制周期之后，如果车辆在低系数表面上运行，适当的逻辑将允许的百分比滑差改变为较低的值。 伴随着用于制动压力调制的第一循环的初始高系数表面条件包括在应用车辆制动时记住初始速度的一种手段。 在第一个调制周期期间，通过进一步衰减制动压力，使制动轮回到初始速度的给定百分比。