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11. 发明专利

JPH0367768A ANTI-SKID CONTROL DEVICE 失效
公开(公告)号：JPH0367768A
公开(公告)日：1991-03-22
申请号：JP20349089
申请日：1989-08-04
申请人： AISIN SEIKI , TOYOTA MOTOR CORP
发明人： KUWANA KAZUTAKA , OKAMOTO KUNIAKI , YOSHIDA TSUYOSHI , ICHIKAWA HIROYUKI , KAMIKADO MASARU , NAKANISHI NOBUYASU , SUGITANI TATSUO , SAKAI KAZUNORI
IPC分类号： B60T8/66 , B60T8/1763 , B60T8/64 , B60T8/70
摘要： PURPOSE:To prevent wheels from being locked at an early stage by vibration, etc. of a wheel speed by converting a fluid pressure control mode from a pressure increase mode to a retention mode or pressure reduction mode when the wheel speed is above that obtained at the maximum inflection point indicating the maximum value of the wheel speed at which it starts to decreases. CONSTITUTION:A fluid pressure control device M2 for controlling brake fluid pressure delivered from a fluid pressure generating device M1 and supplied to a wheel cylinder 53 is controlled by a fluid pressure control mode setting means M5 to which the output signal of a wheel speed setting means M3 and that of a reference speed setting means M4 for calculating a reference speed according to the output of the means 3 are input. At the setting means M5 a pressure reduction mode or retention mode is selected when wheel speed is below a reference speed, while when above the reference speed a pressure increase mode is selected. When the maximum inflection point indicating the maximum value of the wheel speed at which the wheel speed starts to decrease, as the wheel speed is above the reference speed, the pressure increase mode is converted to the retention mode or pressure reduction mode by a mode correcting means M7.

12. 发明专利

JPH0367767A ANTI-SKID CONTROL DEVICE 失效
公开(公告)号：JPH0367767A
公开(公告)日：1991-03-22
申请号：JP20348989
申请日：1989-08-04
申请人： AISIN SEIKI , TOYOTA MOTOR CORP
发明人： KUWANA KAZUTAKA , OKAMOTO KUNIAKI , YOSHIDA TSUYOSHI , ICHIKAWA HIROYUKI , KAMIKADO MASARU , NAKANISHI NOBUYASU , SUGITANI TATSUO , SAKAI KAZUNORI
IPC分类号： B60T8/172 , B60T8/66
摘要： PURPOSE:To surely start anti-skid control by controlling a fluid pressure control device according to the result of comparaison of wheel speed with first and second estimated vehicle speeds calculated by first and second estimated vehicle speed setting means according to the result of detection of braking operation. CONSTITUTION:A braking force control means M6 is provided to which the output signals of a vehicle acceleration detecting means M4 and the wheel speed detecting means M5 of driving wheels RR, RL are input so that it drives a fluid pressure control device M2 to control brake fluid pressure to be supplied to wheel cylinders 53, 54 on the side of driving wheels. Also, first and second estimated vehicle speed setting means M7, M8 are provided which calculate first estimated vehicle speed, at the detection of braking operation by a braking control detecting means M3 detects braking operation, by converting the rate of decrease used for calculating a set speed to a smaller rate of decrease, thereby controlling the fluid pressure control device M2 according to the result of comparaison of vehicle speeds. While braking operation is not performed, the fluid pressure control device M2 is controlled according to the result of comparaison of a second estimated vehicle speed with a vehicle speed.

13. 发明专利

JPH0367765A ANTI-SKID CONTROL DEVICE 失效
公开(公告)号：JPH0367765A
公开(公告)日：1991-03-22
申请号：JP20442489
申请日：1989-08-07
申请人： AISIN SEIKI , TOYOTA MOTOR CORP
发明人： ICHIKAWA HIROYUKI , KUWANA KAZUTAKA , OKAMOTO KUNIAKI , YOSHIDA TSUYOSHI , KAMIKADO MASARU , NAKANISHI NOBUYASU , SUGITANI TATSUO , SAKAI KAZUNORI
IPC分类号： B60T8/58 , B60T8/1761
摘要： PURPOSE:To cancel out the lack of braking forces by permitting wheel cylinder fluid pressure to be reduced during the course of satisfying predetermined requirements for starting pressure reduction if the time needed for the requirements for starting pressure reduction is less than a predetermined time, and inhibiting control of a brake fluid pressure control means after the requirement for starting pressure reduction are not satisfied. CONSTITUTION:An anti-skid control device 100 for controlling the braking fluid pressure of driving wheels RR, RL has an actuator 12 interposed between fluid pressure piping 7 and 8 for guiding the braking pressure of a master cylinder 3 to a rear wheel cylinder 10, 11 and uses the actuator 12 to adjust braking pressure to be applied to the wheel cylinder 10, 11. In an ECU for controlling the actuator 12, it is determined according to the wheel speed whether or not predetermined requirements for starting pressure reduction are satisfied, and when the predetermined requirements for starting pressure reduction are satisfied and the time that was needed for the requirements to be satisfied is more than a set time, control of the braking fluid pressure is permitted. When the time needed for the requirements to be satisfied is less than the set time, control of the braking fluid pressure is inhibited after the requirements for starting pressure reduction are not satisfied.

14. 发明专利

JPH01317863A CONTROL DEVICE FOR ANTISKID 失效
公开(公告)号：JPH01317863A
公开(公告)日：1989-12-22
申请号：JP15191588
申请日：1988-06-20
申请人： AISIN SEIKI , TOYOTA MOTOR CORP
发明人： KUWANA KAZUTAKA , OKAMOTO KUNIAKI , KONDO KOICHI , ICHIKAWA HIROYUKI , MATSUMORI HIROYUKI , YOSHIDA TSUYOSHI , ASAMI KEN , NAKANISHI NOBUYASU
IPC分类号： B60T8/58 , B60T8/1761 , B60T8/1766 , B60T8/66
摘要： PURPOSE:To prevent the inconvenience of locking a front wheel only at go- astern time by actuating a braking pressure control means only at the time when a vehicle is detected to go ahead in the body performing an antiskid control only for a rear wheel. CONSTITUTION:The actuator 12 adjusting a braking pressure according to the instruction of ECU by being driven by the oil pressure fed from an oil pump 13 is interposed between hydraulic pipings 7, 8 in the body transmitting the braking power generated from a master cylinder 3 according to the stepping power of a brake pedal 1 to a rear wheel side wheel cylinders 10, 11 via hydraulic pipings 7-9. An estimating vehicle speed and a wheel rotation acceleration are operated based on the rotating speed and the acceleration of the vehicle of a rear wheel detected by a wheel speed sensor 20 and acceleration sensor 21 in the ECU. Based on this arithmetic result the actuator 12 is controlled at the time when decided to be a vehicle go-ahead time from the output of a go-astern display lamp switch 17.

15. 发明专利

JPS6378867A ANTISKID CONTROL DEVICE 失效
公开(公告)号：JPS6378867A
公开(公告)日：1988-04-08
申请号：JP22567986
申请日：1986-09-24
申请人： AISIN SEIKI , TOYOTA MOTOR CORP
发明人： KUWANA KAZUTAKA , WATANABE TORU , TAKEUCHI HIROAKI , YOSHIDA TSUYOSHI , NAKANISHI NOBUYASU , HOSODA TOMOHIKO
IPC分类号： B60T8/66
摘要： PURPOSE:To ensure a proper brake pressure control and the controllability, by controlling a brake pressure respectively individually of the first front wheel and its diagonally rearward positioned second rear wheel while in common of the second front wheel and its diagonally rearward positioned first rear wheel. CONSTITUTION:A brake pressure is controlled for a right front wheel FR and a left rear wheel RL respectively individually by oil hydraulic control valve units 4, 5 and for a left front wheel FL and a right rear wheel RR in common by an oil hydraulic control valve unit 3. In case, for instance, that a vehicle is driven running on a snow-covered road winding a chain only on the front wheel, when the rear wheel tends to be locked by depressing a brake pedal 1, a control circuit 14, on the basis of a wheel rotary speed signal from sensors 10, 11, 12R, 12L, decreases a fluid pressure from a master cylinder 2 by the oil hydraulic control valve unit 5, and an excessive slip of the left rear wheel RL is prevented before occurrence. Since the front wheel is not influenced by the control of said brake pressure, controllability is surely ensured by the three wheels. In this way, the proper control of the brake pressure and the controllability can be ensured by at least the three wheels.

16. 发明专利

JPH054574A ANTISKID CONTROL DEVICE 失效
公开(公告)号：JPH054574A
公开(公告)日：1993-01-14
申请号：JP28074791
申请日：1991-09-30
申请人： AISIN SEIKI
发明人： KUWANA KAZUTAKA , OKAMOTO KUNIAKI , YOSHIDA TSUYOSHI , ICHIKAWA HIROYUKI , KAMIKADO MASARU , ITABASHI EIJI
IPC分类号： B60T8/58 , B60T8/172 , B60T8/1763 , B60T8/66
摘要： PURPOSE:To prevent the occurrence of rapid lock and to ensure stability of a vehicle by performing control based on a reference speed during running on a high mu road surface at a high speed to prevent the increase of a braking distance and performing control based on the peak of a wheel speed during running at a low speed. CONSTITUTION:One of a hydraulic pressure control modes to reduce a brake hydraulic pressure, the mode to hold the brake hydraulic pressure, and the mode to increase the brake hydraulic pressure is set by a hydraulic pressure control mode setting means M7 to drive a hydraulic control device M2. Either a first pressure increase mode to increase a pressure when a wheel speed exceeds a reference speed or a second pressure increase mode to increase a pressure when a wheel speed exceeds a wheel speed at a peak is selected according to the deciding result of a road surface deciding means M6. A hydraulic pressure control mode is switched by a pressure increase mode switching means M8 so that the first pressure increase mode is selected when it is decided that a road surface has a high friction factor at least in a given range and a reference speed is in a high speed area exceeding a given speed, and the second pressure increase mode is selected when the reference speed is below the given speed in a low speed area.

17. 发明专利

JPH03208758A BRAKE PRESSURE CONTROLLER 失效
公开(公告)号：JPH03208758A
公开(公告)日：1991-09-11
申请号：JP493790
申请日：1990-01-12
申请人： AISIN SEIKI
发明人： NOMURA DAIKI , HIRATA MASASHI , YOSHIDA TSUYOSHI
IPC分类号： B60T8/175 , B60T8/172 , B60T8/1763 , B60T8/58
摘要： PURPOSE:To smooth the regulation of carwheel brake pressure, by detecting a road surface friction coefficient at the time of the start of carwheel brake pressure regula tion, and making the brake pressure regulation at the time of the start of carwheel brake pressure regulation an appropriate one that copes with a road surface condition. CONSTITUTION:Pressure regulating means 3, 3A, 4, 4A whose purpose is to regulate brake pressure, are provided at the middle of connecting brake liquid pipe passeges between brake pressure surfaces including a master cylinder 2 and respective carwheel brakes 6-9, and when these are controlled by means of an electronic controller 10 according to a vehicle operation condition, a reference speed and the acceleration of the reference speed are operated from the output of respective carwheel speed detecting means 12fr-12rL. Also, whether carwheel brake pressure regulation is needed or not is decided on the basis of variables (a slip rate, a carwheel acceleration) includ ing a carwheel rotation speed and the reference speed. And a road surface mu is esti mated from the acceleration of the reference speed at the time of carwheel brake regulation need having been decided, and the electric current values or respective pressure regulating means 3, 3A, 4, 4A are determined in coping with this road surface mu.

18. 发明专利

JPH03159854A ANTI-SKID CONTROL DEVICE 失效
公开(公告)号：JPH03159854A
公开(公告)日：1991-07-09
申请号：JP29848989
申请日：1989-11-16
申请人： AISIN SEIKI
发明人： KUWANA KAZUTAKA , YOSHIDA TSUYOSHI , ICHIKAWA HIROYUKI , TOUTSU KENJI
IPC分类号： B60T8/1755 , B60T8/1761 , B60T8/66
摘要： PURPOSE:To prevent generation of premature lock by incorporating such an arrangement that the braking liquid pressure is controlled depending upon the result from comparison of the wheel speed with the presumed car body speed, and therein calculating said presumed speed according to its reduction ratio of at least some of the wheels excluding the object to be calculated. CONSTITUTION:In an anti-skid control device concerned, solenoid valves 31, 32; 33, 34 are installed on a liquid pressure path leading from one of the output ports of a master cylinder 2a to wheel cylinders 51, 54, while solenoid valves 35, 36; 37, 38 are mounted on a pressure reducing path communicating from the other output port of master cylinder 2a to the other wheel cylinders 52, 53. The braking liquid pressure is controlled incrementally or decrementally by controlling these solenoid valves 31-38 using an electronic control device 10. Therein, control signals are generated depending upon the result form comparison of the wheel speeds with the presumed car body speed calculated from the outputs of wheel speed sensors 41-44, wherein the calculation of the presumed speed is made according to its reduction ratio of at least some of the wheels excluding the object to be calculated.

19. 发明专利

JPH02171377A ANTI-LOCK CONTROL DEVICE 失效
公开(公告)号：JPH02171377A
公开(公告)日：1990-07-03
申请号：JP32742588
申请日：1988-12-24
申请人： AISIN SEIKI
发明人： KUWANA KAZUTAKA , NODA YASUO , NOMURA DAIKI , YOSHIDA TSUYOSHI
IPC分类号： B60T8/46 , B60T8/172 , B60T8/1761 , B60T8/1763 , B60T8/36 , B60T8/58 , B60T8/62 , B60T8/64
摘要： PURPOSE:To perform precise anti-lock control corresponding to the condition of road surfaces by making a hydraulic pressure setting means set up a specified target hydraulic pressure for a drive control means, and thereby permitting the braking hydraulic pressure of a wheel cylinder to be regulated to the target hydraulic pressure. CONSTITUTION:When a pressure developing device 101 is driven, braking hydraulic pressure is supplied to a wheel cylinder 51 via a pressure control valve device 102 so that braking force is applied to a wheel FR. Then, the rotating speed, that is, the wheel speed of the wheel FR is detected by a wheel speed detecting means 103. The operation of the aforesaid pressure control valve device 102 is controlled by a braking force control means 104. In the braking force control means 104, a specified target hydraulic pressure is set up by a target hydraulic pressure setting means 105. The target hydraulic pressure shall be of a constant valve or shall be of a value corresponding to the condition of road surfaces, which is set up as a control target for a drive control means 106. The pressure control valve device 102 is driven by the drive control means 106, braking hydraulic pressure to be supplied to the wheel cylinder 51 is thereby regulated to the aforesaid target hydraulic pressure.

20. 发明专利

JPH0238175A BRAKE PRESSURE CONTROLLER 失效
公开(公告)号：JPH0238175A
公开(公告)日：1990-02-07
申请号：JP19090088
申请日：1988-07-29
申请人： AISIN SEIKI
发明人： ADACHI YOSHIHARU , KUWANA KAZUTAKA , YOSHIDA TSUYOSHI
IPC分类号： B60T8/58 , B60T8/1761 , B60T8/1763 , B60T8/36 , B60T8/42
摘要： PURPOSE:To control electric current running to an electric coil and successively regulate the wheel braking pressure by inserting through an electric coil a means which conducts electric current to place a valve body in more than one points between the primary position and the secondary position of the valve body. CONSTITUTION:In a pressure control valve device 3 of which each is mounted in the way of a piping carrying the braking pressure generated by a master cylinder 2 to each of wheel brakes 6, an electromagnetic valve 120 is incorporated in said device 3 as a main part thereof. A return driving means 124 gives the return driving force to the valve body 22 to drive it in the return (right) direction from the second position to the first position. On the other hand, an output affecting space 25 is communicated with an output port 27 so that the pressure at the output port 25, that is, the wheel braking force is applied to the valve body 122 as the go-direction driving pressure, and furthermore the electric coil 123 gives the valve body 122 the return-direction driving force corresponding to the height of supply current. The braking pressure corresponding to (in reverse proportion to) the height I of supply current across the electric coil 124 may then be applied to the wheel brake 6.

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