公开(公告)号：JPS61110659A

公开(公告)日：1986-05-28

申请号：JP23115384

申请日：1984-11-05

Applicant: Toyota Motor Corp

Inventor： SHIMIZU HIDETOSHI ,  OKA HIROYUKI ,  HORIE MITSUYUKI ,  SUGITANI TATSUO ,  KANEKO HISANORI

IPC: B60T8/44 ,  B60T8/32 ,  B60T8/46 ,  B60T8/66

Abstract: PURPOSE: To make constant deceleration attainable even if a load or the like varies, by driving a three-position valve of an actuator with a pedal-pressure signal out of a pedal-pressure detecting arm and an output signal corresponding to various conditions of car body weight or the like detected by a car speed sensor signal, while operating a brake.
CONSTITUTION: When a brake pedal 2 is operated, pedal effort is added to a pedal- pressure detecting arm 19 whereby a pedal-pressure signal is transmitted to a hydraulic control unit 21 together with a signal out of a car speed sensor 22, and deceleration corresponding to the pedal effort is calculated with a signal on the basis of the reference car speed calculated by the unit 21, then a selection signal to an A port is transmitted to a three-position valve 14. Next, oil out of an oil pump 11 is fed to an IN side pressure chamber 10 of a master cylinder 4, pressing pistons 24 and 27, and with oil inside each of both front and rear hydraulic chambers 25 and 29, front and rear wheels 5 and 6 are pushed with pressure, thus braking them. Then, in the deceleration, an actual value of the sensor 22 comes to be lower than the calculated reference car speed, and a selection signal is transmitted to both B and C ports of the valve 14 from the control unit 21, whereby pressure in these hydraulic chambers 25 and 29 is kept up at the B port, and oil in the pressure chamber 10 is put back at the C ports, releasing the applied pressure to wheels.
COPYRIGHT: (C)1986,JPO&Japio

Abstract translation: 目的：即使负载等变化，也能够实现恒定的减速，通过用踏板压力检测臂的踏板压力信号驱动致动器的三位置阀和对应于各种状态的输出信号 同时操作制动器，由车速传感器信号检测到的体重等。 构成：当操作制动踏板2时，踏板压力检测臂19被加到踏板压力检测臂19上，踏板压力信号与来自轿厢速度传感器22的信号一起被传送到液压控制单元21，并且减速 基于由单元21计算出的基准轿厢速度的信号来计算对应于踏板力的信号，然后将向A端口的选择信号传送到三位置阀14.接下来，从油泵 11被馈送到主缸4的IN侧压力室10，按压活塞24和27，并且在前后液压室25和29的每一个内部具有油，前后轮5和6被压力推动， 从而制动它们。 然后，在减速度中，传感器22的实际值低于计算出的基准轿厢速度，并且选择信号从控制单元21传送到阀14的B和C端口，由此这些 液压室25和29保持在B端口处，并且压力室10中的油被放回C端口，释放施加的压力到轮子上。