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1. 发明专利

JPH07329758A ANTI-SKID CONTROL DEVICE FOR VEHICLE 失效
公开(公告)号：JPH07329758A
公开(公告)日：1995-12-19
申请号：JP13069094
申请日：1994-06-13
申请人： NIPPON DENSO CO
发明人： TANIGUCHI MASAHIKO , MAKI KAZUYA , WATANABE TAKASHI , MIZUTANI JUNJI
IPC分类号： B60T8/58 , B60T8/172 , B60T8/1763 , B60T8/1764
摘要： PURPOSE:To establish both maintenance of steering stability performance and shortage of braking distance while satisfying the driver's expectation sufficiently to a deceleration on a mixed road surface where ice part is mixed with asphalt part that can be seen frequently in winter cities. CONSTITUTION:In a pressure reducing mode in which a wheel speed lowers below a target wheel speed, first an assumed body speed VB is compared with a reference speed VO and, when VB is equal or larger than VO, an ordinary pressure reducing output is performed (Step 300 to 320). When VB is smaller than VO, NR which indicates the number of executions of the pressure reducing mode is incremented to calculate an output request time TL for hydraulic pressure abrupt increase (Step 330 to 350). The hydraulic pressure abrupt increase output is a pulse output with larger duty ratio than that of an ordinary pressure boosting output. Also TL is given as the function of NR, and TL=0 up to NR=N1. Next it is checked that a wheel to be controlled is a front wheel and the other wheel is not under the hydraulic pressure abrupt increase control, and hydraulic pressure abrupt increase signals are output over TL.

2. 发明专利

JPH0796825A VEHICULAR SLIP CONTROLLER 失效
公开(公告)号：JPH0796825A
公开(公告)日：1995-04-11
申请号：JP24259393
申请日：1993-09-29
申请人： NIPPON DENSO CO
发明人： SAITO SHIGERU , MAKI KAZUYA , GOSHIMA TAKAHIRO
IPC分类号： B60T8/1755 , B60T8/172 , B60T8/1761 , B60T8/58
摘要： PURPOSE:To improve the brake performance in a vehicular turning time by correcting the wheel speed of right/left wheels and a standard speed to be compared together to a low speed when a vehicular turning state is detected. CONSTITUTION:In ABS computer 120, the wheel speed is calculated respectively based on the detection signal from wheel speed sensors 101-104, the wheel acceleration of respective wheels is calculated based on the wheel speed, a vehicular friction coefficient mu between a running road surface and a wheel is decided based on the detection signal of G sensor 110 and a carbody speed is calculated based on the wheel speed of respective wheels. When the vehicle is in a go straight state, usual target control speed is calculated and the steering angle of a steering wheel is calculated by the detection signal of a steering sensor 130 and it is calculated by the calculated steering angle to what extent a slip rate with the highest friction coefficient mu. is offset in comparison with that of the go straight state. The most suitable target control car-speed is calculated by using the usual target control car speed and the target control corrective car-speed in a turning time.

3. 发明专利

JPH07329757A ANTI-SKID CONTROL DEVICE FOR VEHICLE 失效
公开(公告)号：JPH07329757A
公开(公告)日：1995-12-19
申请号：JP13068994
申请日：1994-06-13
申请人： NIPPON DENSO CO
发明人： TANIGUCHI MASAHIKO , MAKI KAZUYA
IPC分类号： B60T8/58 , B60T8/1755 , B60T8/1761 , B60T8/84
摘要： PURPOSE:To eliminate a feeling of physical disorder that ABS is started earlier than an operator expects by delaying the start timing of the ABS control of a wheel with highly lockable tendency and also delaying the start timing of the ABS control by sufficiently braking at least one wheel. CONSTITUTION:For a wheel in which a deviation DELTAVW1 of rotational speed based on a wheel (Max. wheel) which is braked by a specified or more of deceleration (Step 240=YES) and the max. rotational speed is reached before the wheel to be controlled is brought under ABS control movement conditions is a specified value or more of DELTAVD (Step 250=YES), the pressure boosting of braking pressure is suppressed (Steps 280 and 290). In this case, it is judged by the magnitude of the assumed value Gyi of lateral acceleration whether a vehicle is turning sharply or not (Step 260) and, when it is turning sharply, the pressure boosting gradient of an inner wheel is set small remarkably (Steps 270 and 290).

4. 发明专利

JPH02102861A ANTISKID CONTROLLER 失效
公开(公告)号：JPH02102861A
公开(公告)日：1990-04-16
申请号：JP25456888
申请日：1988-10-07
申请人： NIPPON DENSO CO
发明人： FUKUSHIMA AKIRA , MAKI KAZUYA
IPC分类号： B60T8/58 , B60T8/172 , B60T8/1764 , B60T8/66
摘要： PURPOSE:To actualize compatibility of braking efficiency and running stability by judging a frictional stage between a wheel and road surface, and performing control over a high-select approach on a normal uniform road, while during sudden turning and on a low frictional road or the like, preferentially controlling brake pressure of the wheel at a side being considered to be yet more important. CONSTITUTION:In this controller, there are provided with a braking force adjusting means M1 controlling braking force between a first wheel and a second wheel, both wheel speed detecting means M2, M3 detecting each wheel speed, a running state calculating means M4 calculating a vehicle running state on the basis of the detected wheel speed, and a frictional state judging means M5 judging a frictional state between the wheels and a road surface on the basis of the calculated running state. In addition, there are provided with a weighting factor output means M6, which selects a weighting factor to be used at a weighting mean on the basis of the judged result here at, and a weighting means wheel speed calculating means M7 for finding a weighting mean wheel speed on the basis of each wheel speed and the weighting factor. Then, the braking force adjusting means M1 is controlled according to the weighting mean wheel speed.

5. 发明专利

JPH08133039A VEHICLE CONTROLLER 失效
公开(公告)号：JPH08133039A
公开(公告)日：1996-05-28
申请号：JP30559994
申请日：1994-11-14
申请人： NIPPON DENSO CO
发明人： MAKI KAZUYA , TANIGUCHI MASAHIKO
IPC分类号： B62D6/00 , B60T8/1755 , B60T8/24 , B60T8/58 , B62D11/08
摘要： PURPOSE: To secure control performance sufficiently by means of simple constitution by controlling braking of a rotational outside front wheel when a turning radius is large, controlling braking of a rotational inside rear wheel when the turning radius is small, and braking other wheels by means of a brake pedal. CONSTITUTION: To a master cylinder 2 pressurized by an operation of a brake pedal 1, two system hydraulic paths consisting of a right front wheel and left rear wheel system 10-1 and a left front wheel and right rear wheel system 10-2 are connected. Solenoid valves 31, 37, in which pressurization to wheel cylinders 80-83 by a brake pedal 1 and that by pumps 20, 22 are switched from one to the other by switching an A condition and a B condition, are operated on the basis of a control signal from an ECU 4. By means of actions of the solenoid valves 31, 37, one of two system hydraulic paths consisting of the right front wheel and left rear wheel system 10-1 and the left front wheel and right rear wheel system 10-2 is always pressurized from the pedal 1.

6. 发明专利

JPH07101328A SLIP CONTROL DEVICE FOR VEHICLE 失效
公开(公告)号：JPH07101328A
公开(公告)日：1995-04-18
申请号：JP25171393
申请日：1993-10-07
申请人： NIPPON DENSO CO , TOYOTA MOTOR CORP
发明人： SAITO SHIGERU , MAKI KAZUYA , GOSHIMA TAKAHIRO , NAKAGAWA FUMIO
IPC分类号： B60T8/24 , B60T8/172 , B60T8/1755 , B60T8/1763 , B60T8/58 , B60T8/66
摘要： PURPOSE:To contrive compatibility of steering performance and braking performance at the time of braking a vehicle turned. CONSTITUTION:A device comprises wheel speed sensors 101 to 104, G sensor 110, steering angle sensor 130 and an ABS computer 120, and the ABS computer 120 calculates each wheel speed and a car body speed from detection signals of the wheel speed sensors 101 to 120 and calculates an ordinary target control car speed VSN when a vehicle is placed in a straight advancing condition based on both the wheel and car body speeds. Simultaneously with the above, based on a steering angular speed calculated from a detection signal of the steering angle sensor 130, when quick steering is decided to be performed, the ordinary target control car speed VSN is corrected in a direction of increasing by a quick steering correction amount DELTAK, and also this quick steering correction amount DELTASK is changed in accordance with a road surface mu decided from a detection value of the G sensor 110.

7. 发明专利

JPH02102860A ANTISKID CONTROLLER 失效
公开(公告)号：JPH02102860A
公开(公告)日：1990-04-16
申请号：JP25456788
申请日：1988-10-07
申请人： NIPPON DENSO CO
发明人： FUKUSHIMA AKIRA , MAKI KAZUYA
IPC分类号： B60T8/58 , B60T8/172 , B60T8/1764 , B60T8/66
摘要： PURPOSE:To actualize compatibility for both braking efficiency and travel stability favorable for a road state and a running state by correcting wheel speed at the low speed side to a weighting factor conformed to that at the high speed side when it fails to be reset to the specified reference speed till the specified time elapses after a wheel speed difference has come to more than the specified one. CONSTITUTION:In this controller, there are provided with a braking force adjusting means M1 controlling force between a first wheel and a second wheel, both wheel speed detecting means M2, M3, and a running state calculating means M4 calculating a vehicle running state on the basis of the detected wheel speed. Also there are provided with a weighting factor setting means M5 setting a weighting factor on the basis of the calculated running state, and a weighting factor correction means M6 correcting the weighting factor conformed to the wheel speed at the high speed side when the wheel speed at the low speed side fails to be reset to the specified reference one till the specified time elapses after a wheel speed difference based on the running state has come more than the specified one in addition, after the setting means M5 has been set. Then, on the basis of each wheel speed and the weighting factor, weighting mean wheel speed is found by a calculating means M7, and thereby the braking force adjusting means M1 is controlled.

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