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公开(公告)号：JPS61157458A
公开(公告)日：1986-07-17
申请号：JP27427684
申请日：1984-12-28
Applicant: TOYOTA MOTOR CORP
Inventor： SHIMIZU HIDETOSHI , OKA HIROYUKI
IPC: B60T8/18 , B60T8/1761 , B60T8/1766 , B60T8/88 , B60T8/92
Abstract: PURPOSE:To surely operate a brake even upon occurrence of a trouble, by connecting a pressure source to a pressure chamber in a booster through a dual system hydraulic circuit, and by exclusively selecting the communication or isolation of several systems upon normal operation of a computer or upon abnormal operation of the computer. CONSTITUTION:A reservoir chamber 24 in a brake force transmission cylinder 8 is connected to an accumulator 28 and a hydraulic pump 29 through a hydraulic circuit 31 having a control valve 27. Further, the accumulator 28 is connected to a reservoir chamber in a depressing force cylinder 10 through a hydraulic circuit 57 while the reservoir chamber is connected to a pressure regulating chamber (which is not shown) through a depressing force change-over valve. Further, this pressure regulating chamber is connected to the reservoir chamber 24 through a hydraulic circuit 63 having a change-over valve 62. These valves 27, 62 are controlled by a computer 7. Normally, the valve 27 is opened but the valve 62 is closed, and therefore, the pressure is fed from the circuit 31. When the computer 7 is abnormal, the valves 27, 62 are changed over so that the pressure is fed from the circuit 63.
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公开(公告)号：JPS61155047A
公开(公告)日：1986-07-14
申请号：JP27427484
申请日：1984-12-28
Applicant: TOYOTA MOTOR CORP
Inventor： SHIMIZU HIDETOSHI , OKA HIROYUKI , SUGITANI TATSUO , KANEKO HISANORI
Abstract: PURPOSE:To enable deceleration driving expected by a driver, according to a method wherein a control valve in an oil pressure circuit is controlled in accordance with the treading force on a brake pedal and a vehicle speed, and braking action is performed by using two systems making the toggle joint braking action of an oil pressure back up type. CONSTITUTION:A booster 2 operated by means of a brake pedal 5 through a load cell 4 and a push rod 3, consists of a braking force transmitting cylinder 8 on the base side, and a master cylinder 9 mounted on the front portion of the cylinder 8. The reservoir chamber of the braking force transmitting cylinder 8 is connected to a control valve 45 interposed in an oil pressure circuit 44 including an oil pressure pump 41, which is an oil pressure backing up toggle power source, and an accumulator 43. In braking force insufficient condition, a control signal is outputted from a control valve 48 by means of a computer 7 inputting the output signals from vehicle speed sensors 6 and the load cell 4 so as to obtain an optimum deceleration with respect to the treading force, and then the chamber 48 is controlled to be connected to the oil pressure circuit 44.
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公开(公告)号：JPS61155046A
公开(公告)日：1986-07-14
申请号：JP27427384
申请日：1984-12-28
Applicant: TOYOTA MOTOR CORP
Inventor： SHIMIZU HIDETOSHI
Abstract: PURPOSE:To improve vehicle running safety, according to a method wherein an automobile braking system consists of 3 systems including systems making automatic servo braking for controlling a control valve in an oil pressure circuit in accordance with treading force and vehicle speed respectively and a system obtaining an optimum deceleration immediately in response to treading force at the malfunction of an electric system. CONSTITUTION:A booster 2 operated by means of a brake pedal 5 through a main rod 3 and a sub rod 4, consists of a braking force transmitting cylinder 8 on the base side, a master cylinder 9 mounted on the front portion of the cylinder 8, and a treading force cylinder 10 integrally mounted on the lower side of the cylinder 8. the two reservoir chambers of the braking force transmitting cylinder 8 are respectively connected to a pair of control valves 44 and 45 interposed in parallel in an oil pressure circuit including an oil pressure pump 41 and an accumulator 43. Each of the valves 44 and 45 is respectively used for the control of a power and a spool pistons in the cylinder 8, and the control valve 44 is opened by means of a spring and the control valve 45 is closed when the malfunction of a computer 7 or the like is generated.
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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
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&JapioAbstract 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。
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公开(公告)号：JPS59190047A
公开(公告)日：1984-10-27
申请号：JP6279983
申请日：1983-04-08
Applicant: Toyota Motor Corp
Inventor： SHIMIZU HIDETOSHI
IPC: B60T8/26
CPC classification number: B60T8/26
Abstract: PURPOSE:To heighten braking force for rear wheels while avoiding a rear wheel lock and relieve a load of a brake on front wheels, by connecting two types of P valves to space between a master cylinder and a rear wheel cylinder in series and then performing a technique for hydraulic control in two steps. CONSTITUTION:Two units of first and second P valves 10 and 12 are built in a housing 14 in series, and a side of the first P valve 10 is set so as to start its pressure reducing control with relatively low pressure as compared with the counterpart. And, the upstream side of the first P valve 10 is connected to a master cylinder 72 while the downstream side of the second P valve 12 to a rear wheel cylinder 78, respectively. In time of quick braking, the first P valve 10 is actuated, thereby closing an on-off valve 32 and checking a rise in hydraulic pressure. However, the hydraulic pressure of the master cylinder 72 flows in the upstream side of the second P valve via a fine hole 64 of the housing 14 so that pressure in the wheel cylinder 78 goes up by degrees. When the pressure of the wheel cylinder 78 goes up beyond the specified one, the second P valve 12 is actuated whereby a more pressure rise than this level is thus checked.
Abstract translation: 目的：为了提高后轮的制动力，同时避免后轮锁定并减轻前轮上的制动器的负载，通过将两种P型阀连接到主缸和后轮缸之间的空间，然后执行 液压控制技术分两步进行。 构成：两个单元的第一和第二P阀10和12串联地组装在壳体14中，并且第一P阀10的一侧被设定为与对方相比以相对低的压力开始其减压控制 。 并且，第一P阀10的上游侧分别连接到主缸72，同时将第二P阀12的下游侧连接到后轮缸78。 在快速制动的时候，第一P阀10被致动，从而关闭开关阀32并检查液压的上升。 然而，主缸72的液压经由壳体14的细孔64在第二P阀的上游侧流动，使得轮缸78中的压力上升一度。 当轮缸78的压力升高超过规定值时，第二P阀12被致动，由此检查比该液位高的压力上升。
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Patent Agency Ranking
公开(公告)号：JPH0727155A
公开(公告)日：1995-01-27
申请号：JP31523193
申请日：1993-12-15
Applicant: TOYOTA MOTOR CORP
Inventor： ABE KAZUO , ISHIHARA MASAFUMI , IKEUCHI HITOSHI , OKUDA TOSHIHARU , SAKAKIBARA SHIGEMI , SHIMIZU HIDETOSHI , ICHIBA YASUAKI , SUGANO SHINSUKE
IPC: F16D65/092 , F16D65/00 , F16D65/095
Abstract: PURPOSE:To reduce generation of brake noise through suppression of the generation of vibration of a brake pad by a method wherein when a brake force is exerted, a rotation force is exerted on the brake pad, and the brake pad is brought into a caliper or the two different spots of a member assembled to the caliper. CONSTITUTION:When a brake pedal is stepped on in a state that a vehicle is run forward, back plates 52 and 62 are pulled in a front direction corresponding to the rotation direction of a disc rotor and brought into contact with a torque support part 30c, and brake torque of a wheel is exerted on the support part 30c. In this case, since the back plates 52 and 62 of the brake pad are energized frontward downward through the force of a crossed spring 71, the back plates 52 and 62 are moved in parallel as the downward force of the crossed spring 71 is exerted thereon. Thus, the back plates are pressed against the upper part of the inner peripheral surface of oblong holes 52a and 62a and the outer periphery of a hanger pin 41 and slide resistance is generated between the upper part of the inner peripheral surface thereof and the hanger pin 41. Meanwhile, since a friction force is also generated between the side end faces of the back plates 52 and 62 and the torque support part 30c, the generation of vibration of the back plates 52 and 62 is regulated and the generation of brake noise owing to vibration is reduced.
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公开(公告)号：JPS61287851A
公开(公告)日：1986-12-18
申请号：JP13041285
申请日：1985-06-14
Applicant: TOYOTA MOTOR CORP
Inventor： TAMANO TORU , HASHIMOTO TOSHIO , SHIMIZU HIDETOSHI , INOUE HIDEO , UCHIYAMA HIROMITSU
Abstract: PURPOSE:To permit a driver to carry out a braking operation with always constant feeling, by dividing vehicle speeds into a plurality of stages at start of braking, and deciding target braking effects. CONSTITUTION:A control device 120 is connected with sensors 122 for detecting rotational speeds of front wheels 94, a brake switch 124, and a load cell 126 for detecting an operating force of a brake pedal 10. According to informations supplied from these, the control device 120 detects a target braking effect corresponding to an operating force of the brake pedal to control a fluid pressure of wheel cylinders 96. At this time, vehicle speeds at start of braking are divided into a plurality of stages, and different target braking effects every stages are decided.
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公开(公告)号：JPS61285162A
公开(公告)日：1986-12-15
申请号：JP12886285
申请日：1985-06-13
Applicant: TOYOTA MOTOR CORP
Inventor： TAMANO TORU , HASHIMOTO TOSHIO , SHIMIZU HIDETOSHI , KANEKO HISANORI
Abstract: PURPOSE:To facilitate brake operation by obtaining a desired braking efficiency which changes according to a preset pattern with the lapse of time after braking is started and controlling the brake drive device so that an actual braking efficiency may become substantially equal to the desired braking efficiency. CONSTITUTION:When a brake pedal 42 is depressed to actuate a brake switch 121 during running of a vehicle an actual vehicle speed V is calculated in a control device 120 from an average of output signals from vehicle speed detecting heads 124, and it is compared with a high speed set value Vo. In case of V =Vo, it is discriminated whether a pattern selecting switch 126 is off or not, that is which deceleration pattern is selected, P1 or P2 with the lapse of time, and according to the result, the electromagnetic switching valve 100 is controlled to be opened or closed.
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公开(公告)号：JPH0874900A
公开(公告)日：1996-03-19
申请号：JP24221294
申请日：1994-09-08
Applicant: TOYOTA CENTRAL RES & DEV , TOYOTA MOTOR CORP
Inventor： SHIMAZU TAKASHI , KATAGIRI SEIRO , SAKAMOTO SHIGERU , SHIMIZU HIDETOSHI
Abstract: PURPOSE: To enhance a wind quantity and a wind speed so as to enhance the cooling ability of a rotor. CONSTITUTION: A brake disc rotor is provided with an inner side sliding plate 11 and an outer side sliding plate 12 which are separately arranged in parallel in the shaft direction of an axle, a plurality of fins 2 composing partitioning walls 2 which are radially arranged between the sliding plates 11 and 12, and a plurality of inlet openings 31 and outlet openings 32 which are respectively opened radially inward and outward between the sliding plates 11 and 12. Further, the brake disc rotor is provided with a plurality of vent holes 4 composing a passage formed by the sliding plates 11 and 12 and the partitioning walls 2 adjoined thereto, and a taper part 5 formed on a wall face between mutually opposed inner side sliding plate and outer side sliding plate on the inner peripheral side.
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公开(公告)号：JPH05346126A
公开(公告)日：1993-12-27
申请号：JP17752792
申请日：1992-06-11
Applicant: TOYOTA CENTRAL RES & DEV , TOYOTA MOTOR CORP , AISIN TAKAOKA LTD
Inventor： SHIMAZU TAKASHI , KATAGIRI SEIRO , SAKAMOTO SHIGERU , SHIMIZU HIDETOSHI , INATOMI AKIO , ISHIHARA MASAFUMI , SHINODA TORU
IPC: F16D65/12
Abstract: PURPOSE:To improve the air-blasting and cooling efficiency of a rotor by suppressing the pressure loss of the flow in a bench hole and the reduction of the surface heat transfer coefficient of the cooling air, and to increase the total heat radiating quantity by increasing the cooling area. CONSTITUTION:A brake disc rotor is provided with sliding plates 11, 12 on the inner and the outer sides which are continuously arranged by keeping the space in the axial direction of the axle, a plurality of fins 2 consisting of an inlet part 21 arranged in a radial and inclined manner relative to the radial direction and an outlet part 22 inclined at a smaller angle from the inlet part 21, a plurality of bench holes 4 which are radially partitioned by the fins 2, an inlet opening 31 and an outlet opening 32 which are respectively open inwardly and outwardly in the radial direction, and communicating ports 5 which are formed in the respective fins 2, and are communicated with the adjacent bench holes 4. The brake disc rotor consists of a round part 61 formed at the inner radius part of a sliding plate 11, a direction changing part 62 formed in the radius part of the sliding plate 12, and a plurality of compact heat- radiating fins 71-74 formed on the outer circumferential part of the inner wall of the sliding plates 11, 12.
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