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51. 发明专利

JPH03284462A ANTI-SKID CONTROLLER 失效
公开(公告)号：JPH03284462A
公开(公告)日：1991-12-16
申请号：JP8604590
申请日：1990-03-31
申请人： AISIN SEIKI
发明人： SAKATA YASUNORI , SAKANE SHINSUKE , YOSHIDA TSUYOSHI
IPC分类号： B60T8/66 , B60T8/172 , B60T8/1764
摘要： PURPOSE:To carry out appropriate pressure reduction control by detecting pressure reduction operation after a dither pressure increasing mode, detecting deceleration of estimated vehicle speed, judging a road condition according to the detected results to set pressure reduction operation time, and detecting entering into a high mu road properly. CONSTITUTION:There is provided a braking force control means M3 which sets any control mode of a pressure reduction mode, sharp pressure increasing mode, slow pressure increasing mode and a dither pressure increasing mode which step-increases pressure at a speed conforming to sharp pressure increasing mode after a dry pressure increasing mode continues for a certain period according to the output signal of a locking condition judging means M2 which computes estimated vehicle speed based on detected output of a wheel speed detecting means M1 to judge a locking condition of a front or rear wheel (a), thus driving a fluid pressure control valve 30. Besides, a road condition is judged by a road condition judging means M6 according to the output from a pressure reduction detecting means M4 which detects pressure reduction operation after the dither pressure increasing mode, and a vehicle deceleration detecting means M5 which detects deceleration of estimated vehicle speed after the dither pressure increasing mode, and at least pressure reduction operation time is set according to the judged result.

52. 发明专利

JPH03118264A ANTISKID CONTROL DEVICE 失效
公开(公告)号：JPH03118264A
公开(公告)日：1991-05-20
申请号：JP25684889
申请日：1989-09-30
申请人： AISIN SEIKI
发明人： KUWANA KAZUTAKA , YOSHIDA TSUYOSHI , ICHIKAWA HIROYUKI , TOTSU KENJI
IPC分类号： B60T8/58 , B60T8/172 , B60T8/1761 , B60T8/1763 , B60T8/64 , B60T8/70
摘要： PURPOSE:To improve the braking property by setting the time distribution of the pressure increasing time and the pressure holding time, or the pressure decreasing time and the pressure holding time, depending on the relative relation of the car wheel acceleration and the car wheel braking rate, and carrying out the pressure control to increase the pressure, to hold the pressure, or to decrease the pressure, depending on the time distribution. CONSTITUTION:While a wheel speed is calculated M2 depending on the output of a wheel speed detecting device M1, an inferred car body speed is set M3, and from the inferred car body speed and the car wheel speed, the car wheel locking rate to indicate the locking tendency of the car wheel is set M4. And depending on the relative relation of a car wheel acceleration and the car wheel looking rate, the time distribution of the pressure increasing time to increase the brake fluid pressure to feed to a wheel cylinder 51, the holding time to hold the brake fluid pressure, the time distribution of the pressure decreasing time to decrease the brake fluid-pressure and the holding time to hold the brake fluid pressure are set M5. And depending on the set time distributions, the pressure control to increase the pressure, to hold the pressure, or to decrease the pressure to the brake fluid pressure is carried out by a pressure control device M6.

53. 发明专利

JPH0379463A ANTISKID CONTROL DEVICE 失效
公开(公告)号：JPH0379463A
公开(公告)日：1991-04-04
申请号：JP21677389
申请日：1989-08-23
申请人： AISIN SEIKI
发明人： KUWANA KAZUTAKA , YOSHIDA TSUYOSHI , SOZU KENJI
IPC分类号： B60T8/66
摘要： PURPOSE:To improve braking performance by calculating an estimated vehicle body speed on the basis of the maximum wheel speeds of wheel speeds of driven wheels and driving wheels at a throttle opening less than a determined value, and on the basis of the maximum wheel speed of only the wheel speed of the driven wheels at the determined throttle opening or more. CONSTITUTION:In an antiskid control device, an estimated vehicle body speed is set by an estimated vehicle body speed setting means M1 on the basis of the output of a wheel speed detecting means S for detecting the wheel speed of each wheel. The estimated vehicle body speed is compared with the wheel speed of each wheel in a braking force control means M2, and according to the comparison result, the brake liquid pressure to be supplied to each wheel cylinder 51-54 is controlled by a pressure control valve V. In this case, in the estimated vehicle body speed setting means M1, the estimated vehicle body speed is calculated on the basis of the maximum wheel speeds of wheel speeds of driven wheels and driving wheels when the detected opening by a throttle opening detecting means M3 is less than a determined opening, and on the basis of the maximum wheel speed of only the wheel speed of the driven wheels when the detected opening is the determined opening or more.

54. 发明专利

JPS63291758A ANTI-LOCK CONTROLLER FOR X PIPING SYSTEM 失效
公开(公告)号：JPS63291758A
公开(公告)日：1988-11-29
申请号：JP12673087
申请日：1987-05-23
申请人： AISIN SEIKI
发明人： KUWANA KAZUTAKA , YOSHIDA TSUYOSHI , SAKANE SHINSUKE
IPC分类号： B60T8/66 , B60T8/172 , B60T8/1764
摘要： PURPOSE:To enhance the stability in braking on the road surface whose friction coefficiency is ununiform by controlling the braking force so as to cancel wheel lock using each hydraulic pressure controlling means of two hydraulic systems according to the speed of the front and rear wheels and utilizing each wheel speed alternately. CONSTITUTION:Two hydraulic systems from a master cylinder 5 are connected to the wheel cylinders 1 and 2 of the respective front wheels through solenoid valves A1 and B1 and to the wheel cylinders 4 and 3 of the respective rear wheels through proportioning valve PV1 and PV2 respectively. And the hydraulic fluid of the wheel cylinders 1 and 4 and that of the wheel cylinders 2 and 3 are discharged to a reservoir tank 7 through solenoid valves A2 and B2 respectively. In this case, when the speed of each wheel falls down to a speed not more than the given speed, the braking force is controlled to cancel a wheel lock by using a hydraulic system according to the speed of the right front wheel and then that of the left rear wheel and the other hydraulic system according to the speed of the right rear wheel and then that of the left front wheel in fixed timing.

55. 发明专利

JPS63291756A ANTI-LOCK CONTROLLER FOR X PIPING SYSTEM 失效
公开(公告)号：JPS63291756A
公开(公告)日：1988-11-29
申请号：JP12672887
申请日：1987-05-23
申请人： AISIN SEIKI
发明人： KUWANA KAZUTAKA , YOSHIDA TSUYOSHI , SAKANE SHINSUKE
IPC分类号： B60T8/66 , B60T8/172 , B60T8/1764
摘要： PURPOSE:To enhance the stability in braking on the road surface whose friction coefficiency is ununiform by controlling braking force so as to cancel wheel lock when the given conditions are satisfied, while the speed of the rear wheel lower in speed has a tendency to be locked and the speed of the other rear wheel is lower than that of the front wheel. CONSTITUTION:Two hydraulic systems from a master cylinder 5 are connected to the wheel cylinders 1 and 2 of the respective front wheels through solenoid valves A1 and B1 and to the wheel cylinders 4 and 3 of the respective rear wheels through proportioning valve PV1 and PV2 respectively. And the hydraulic fluid of the wheel cylinders 1 and 4 and that of the wheel cylinders 2 and 3 are discharged to a reservoir tank 7 through solenoid valves A2 and B2 respectively. In this case, while the speed of the rear wheel lower in speed is discriminated to have a tendency to be locked and the speed of the other rear wheel is lower than that of the front wheels, if the weighted average value of the speed of the front and rear wheels falls down to values not more than the given value, braking force is controlled to cancel wheel lock.

56. 发明专利

JPH1120636A WHEEL BRAKE PRESSURE CONTROLLER 失效
公开(公告)号：JPH1120636A
公开(公告)日：1999-01-26
申请号：JP17265497
申请日：1997-06-27
申请人： TOYOTA MOTOR CORP
发明人： SAKAMOTO SHIGERU , SAWADA KOICHI , TERADA HITOSHI , YOSHIDA TSUYOSHI , HAYASHI SHINJI , KOSAKAI ASAO , KAMIYA AKIHIDE
IPC分类号： B60T8/00 , B60T8/1761 , B60T8/58 , B60T13/66
摘要： PROBLEM TO BE SOLVED: To control high brake pressure in a high braking region by a compact negative pressure booster in correspondence to pedal operation so as to reduce energy consumption by pump drive. SOLUTION: This controller is constituted in such a manner that a negative pressure booster 1b, a master cylinder 1a, a pump 121, and pressure control valves 81, 83 are used. In this case, it is provided with a pedal stepping amount detector 103p, a means 110 which detects vehicle deceleration Gd, and an adjusting control means 110 which drives the pump when deceleration Gd is above power limit corresponding value Gds of the booster and is lower than a target value Go corresponding to pedal stepping amount and increases and decreases wheel brake pressure by pressure intensifying duty control of the pressure control valve 81 so that the deceleration Gd coincides with the target value Go. Furthermore, it is provided with a pressure increase control valve 131 and a pressure decrease control valve 132 for ABS control to substantially separate the master cylinder from the pump and a wheel brake pressure system by the pressure control valves 81, 83 during ABS control.

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