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1. 发明专利

JPS61189449A WATER DROP DETECTOR 失效
公开(公告)号：JPS61189449A
公开(公告)日：1986-08-23
申请号：JP3120685
申请日：1985-02-18
申请人： NIPPON DENSO CO , TOYOTA MOTOR CORP
发明人： MATSUKI TATSUHIRO , WATANABE TAKASHI , TSUDA NOBUO
IPC分类号： G01W1/14 , G01N27/00 , G01N27/04 , G01N27/06 , G01N27/22
摘要： PURPOSE:To extract only an electric output corresponding to a water drop dropped between electrodes by providing a filter circuit for removing the frequency component of impedance change at the movement of the water drop between the electrodes. CONSTITUTION:A comb-teeth like electrode 1 is arranged on a proper position on the surface of a vehicle and a conversion circuit 3 converts the impedance change in the electrode 1 into a voltage signal. The voltage signal is applied to a BPF4, a component due to a water drop out of the frequency component of the voltage signal is passed and a component due to the movement of the water drop is removed. The voltage signal passed through the BPF4 and corresponding to the water drop is amplified by am amplifier circuit 5, and when that the level of the voltage signal exceeds a previously set reference value is discriminated by a comparator 6, the discriminated result is outputted to an one-shot circuit e.g. to control the driving of a wiper controller. In the circuit 3, resistance change in the electrode 1 at the adhesion of the water drop is converted into a voltage waveform through an operational amplifier A1. Thus, only an electric output corresponding to the water drop dropped in the electrode can be extracted.

2. 发明专利

JPH0692218A ANTISKID DEVICE 失效
公开(公告)号：JPH0692218A
公开(公告)日：1994-04-05
申请号：JP26814792
申请日：1992-09-10
申请人： TOYOTA MOTOR CORP , NIPPON DENSO CO
发明人： FUJITA KOZO , TSUCHIYA YOSHIAKI , WATANABE TAKASHI
IPC分类号： B60T8/58 , B60T8/172 , B60T8/1763
摘要： PURPOSE:To provide a device which can conduct the antiskid control during low speed running. CONSTITUTION:If the running speed of an automobile is higher than 15km/h and the slip rate of a wheel exceeds a preset state, the antiskid control is started by pressure reducing control for putting an electromagnetic control valve in the pressure reducing state (S13, S19). If the running speed is less than 15km/h and the wheel is locked, the antiskid control during low speed running is started (S9, S10). The pressure reduction in this case is gently conducted by pulse pressure reducing control for alternately switching the electromagnetic control vale to the pressure reducing state and to the holding state (S15). The holding time is calculated according to a value GXY which is the acceleration in the advancing direction of an automobile and corresponds to a coefficient of friction of the road surface (S2, S3) and the antiskid control is conducted according to the coefficient of friction of the road surface.

3. 发明专利

JPH0672308A ANTI-LOCK CONTROLLER 失效
公开(公告)号：JPH0672308A
公开(公告)日：1994-03-15
申请号：JP25078092
申请日：1992-08-26
申请人： TOYOTA MOTOR CORP , NIPPON DENSO CO
发明人： OKOCHI NORIHIKO , TSUCHIYA YOSHIAKI , WATANABE TAKASHI
IPC分类号： B60T8/58 , B60T8/172 , B60T8/1763
摘要： PURPOSE:To secure a control characteristic that coincides precisely with a road surface characteristic (the coefficient of friction), by deciding the control characteristic of brake pressure at anti-lock control on the basis of not only acceleration/deceleration in a vehicle longitudinal direction but also acceleration/ deceleration in a vehicle latitudinal direction. CONSTITUTION:A brake pedal 10 is connected to a master cylinder 14 through a booster 12. Meanwhile, the master cylinder 14 is connected to respective brake wheel cylinders 26, 36, 46, 54 at respective right and left and front and rear vehicle wheels FL-RR through respective plural solenoid valves 22, 43, 42, 50 and liquid passages 24, 34, 44, 52 or the like. Respective solenoid valves 22... are respectively controlled by means of an electronic control unit 80 on the basis of respective detection signals from respective vehicle wheel speed sensors 102-106 and respective acceleration sensors or the like. In this instance, the control characteristic of brake pressure at anti-lock control is decided on the basis of not only acceleration/deceleration in a vehicle longitudinal direction but also acceleration/deceleration in a vehicle latitudinal direction.

4. 发明专利

JPH0656018A ANTI-SKID CONTROLLER 失效
公开(公告)号：JPH0656018A
公开(公告)日：1994-03-01
申请号：JP21291592
申请日：1992-08-10
申请人： NIPPON DENSO CO , TOYOTA MOTOR CORP
发明人： WATANABE TAKASHI , YAMAMOTO MASAHIRO , TSUCHIYA YOSHIAKI
IPC分类号： B60T8/58 , B60T8/172 , B60T8/1764
摘要： PURPOSE:To improve the quality of brake while the operation stability of a vehicle is being secured on a split road. CONSTITUTION:Counters CTR, CTL respectively count time in which right and left front wheel brake oil pressure is considered to be in a depressurization mode or in a retention mode. When a difference between the CTR and the CTL values is larger than a predetermined value K1 (Step 5241; YES), a split road travel time is determined, and a split road flag is set (Step 5249). When one side has a certain degree of a friction coefficient (Steps 5253, 5257: YES), independent limit control is selected as rear wheel control. As a result, the quality of brake can be improved while operation stability at the split road is being secured.

5. 发明专利

JPH06107142A VEHICLE BODY SPEED PRESUMING DEVICE 失效
公开(公告)号：JPH06107142A
公开(公告)日：1994-04-19
申请号：JP25698992
申请日：1992-09-25
申请人： NIPPON DENSO CO , TOYOTA MOTOR CORP
发明人： WATANABE TAKASHI , YAMAMOTO MASAHIRO , TSUCHIYA YOSHIAKI
IPC分类号： B60T8/17 , B60T8/00 , B60T8/66
摘要： PURPOSE:To presume the speed of a vehicle body being in antiskid control or acceleration slip control in excellent response as the state of a road surface or the like is also reflected, and especially to presume the reset state of the body speed during the antiskid control in the best form complying with the state of road surface. CONSTITUTION:The absolute value Gxy of the composite vector of the output of two sets of G sensors arranged so as to detect horizontal acceleration in a direction included within the range of 45 degrees right and left is computed (S410). When not being in antiskid control, acceleration limit K1 proportional to Gxy is computed, and when being in the antiskid control, the acceleration limit K1 inversely proportional to Gxy is computed (S420 to S440). Deceleration limit K2 is always computed in proportion to Gxy (S450). Next, the maximum value of rotating speed of four wheels is set up as selected wheel speed VSEL (S460), and central value among the selected wheel speed VSEL, and upper and lower limit speeds computed on the acceleration limit K1 and the deceleration limit K2 is set up as present presumed body speed Vo (n) (S470).

6. 发明专利

JPH01226469A DRIVE CONTROLLER FOR VEHICLE 失效
公开(公告)号：JPH01226469A
公开(公告)日：1989-09-11
申请号：JP5227888
申请日：1988-03-04
申请人： NIPPON DENSO CO , TOYOTA MOTOR CORP
发明人： WATANABE TAKASHI , FUJIMOTO SHIYUUSAKU , SAKAI KAZUNORI
IPC分类号： B60T8/72 , B60T8/173 , B60T8/175 , B60T8/1761
摘要： PURPOSE:To enable highly accurate drive control by setting the cut-off frequency at low level for a drive wheel when compared with a driven wheel, thereby suppressing influence of high frequency noise component. CONSTITUTION:In on anti-skid controller 1, a controller 10 detects the speed of drive wheel and driven wheel through a wheel speed sensor 51 then instantaneous accelerations the drive and driven wheels are operated based on the detected speeds. Since the drive wheel is coupled with a mechanism for transmitting the power produced through an engine, the drive wheel has higher inertia than that of the driven wheel. Consequently, the upper limit of frequency distribution of high frequency noise components contained in the instantaneous wheel acceleration obtained through operation is lower for the drive wheel when compared with the driven wheel. Cut-off frequencies for filtering the instantaneous wheel acceleration are differentiated between the drive and driven wheels in order to remove high frequency noise components accurately.

7. 发明专利

JPS6483445A PROPULSION CONTROLLING DEVICE FOR VEHICLE 失效
公开(公告)号：JPS6483445A
公开(公告)日：1989-03-29
申请号：JP24132787
申请日：1987-09-26
申请人： NIPPON DENSO CO , TOYOTA MOTOR CORP
发明人： FUJIMOTO SHIYUUSAKU , WATANABE TAKASHI , ISE SEIKI
IPC分类号： B60T8/175 , B60T8/58
摘要： PURPOSE:To prevent rapid change of rotation speed and secure stable running by controlling a braking device when slipping quantity at each drive wheel exceeds a first standard value, and controlling a drive torque control means when an averaged slipping quantity exceeds a second standard value. CONSTITUTION:Slipping quantity at each drive wheel and an averaged slipping quantity are calculated by a slipping quantity calculating means M4 based on the rotation speed at each drive wheel detected by drive wheel speed detecting means M2-L, M2-R and a standard speed based on the rotation speed of a follower wheel detected by a standard speed detecting means M3. When slipping quantity at each drive wheel exceeds a first standard value, braking devices M5-L, M5-R are driven by drive wheel speed control means M6-L, M6-R to control each drive wheel rotation speed. When an averaged slipping quantity exceeds a second standard value, a drive torque control means M3 controls a drive torque from a drive M7 to be transmitted to drive wheels M1-L, M1-R.

8. 发明专利

JPH0692157A DRIVE TORQUE DISTRIBUTION CONTROL DEVICE 失效
公开(公告)号：JPH0692157A
公开(公告)日：1994-04-05
申请号：JP26814692
申请日：1992-09-10
申请人： TOYOTA MOTOR CORP , NIPPON DENSO CO
发明人： TSUCHIYA YOSHIAKI , WATANABE TAKASHI
IPC分类号： B60K17/348 , B60K17/35 , B60K23/04 , B60T8/1761 , B60T8/58
摘要： PURPOSE:To prevent a situation such as not starting antilock control in opposition to a program by decreasing a differential limit amount of front/rear wheels in a straight braking condition smaller than in a turn braking condition, in a device mounted on a vehicle, where antilock control is performed by estimating a car speed from a wheel speed, to control a ratio of respectively distributing engine torque to front/rear wheels. CONSTITUTION:Even when a vehicle is placed in a braking condition (S104), unless the vehicle is concerned to the case that a synthesized value GXY of longitudinal acceleration GX and cross acceleration GY is a reference acceleration GM or more (S105) and further an absolute value of the longitudinal acceleration GX is reference acceleration GN (

9. 发明专利

JPH0672309A ANTI-SKID CONTROLLER 失效
公开(公告)号：JPH0672309A
公开(公告)日：1994-03-15
申请号：JP25409392
申请日：1992-08-28
申请人： TOYOTA MOTOR CORP , NIPPON DENSO CO
发明人： TSUCHIYA YOSHIAKI , WATANABE TAKASHI , YAMAMOTO MASAHIRO
IPC分类号： B60T8/58 , B60T8/172 , B60T8/1763
摘要： PURPOSE:To conduct accurately the detection of a partial low mu road by detecting the partial low mu road in a case in which anti-skid control in regard to rear wheels becomes necessary within a set time after the start of anti-slid control in regard to front wheels. CONSTITUTION:A four wheel drive vehicle is equipped with a central differential gear 10 and respective front and rear differential gears 20, 30. Respective liquid pressure control valves 50, 52, 56 to connect the respective wheel cylinders 40-46 of respective vehicle wheels 26, 28, 36, 38 to a liquid pressure source 54 are controlled by means of an anti-skid controller 62 on the basis of respective outputs from respective vehicle wheel speed sensors 70-76 or the like. In this instance, a partial low mu road is detected in a case in which the anti-skid control of respective rear wheels 36, 38 becomes necessary within a first set time after the start of the anti-skid control of respective front wheels 26, 28. The start of anti-skid control in regard to respective rear wheels 36, 38 is prohibited within a second set time that is between the start time point of anti-skid control in regard to respective front wheels 26, 28 and the start time point of the first set time.

10. 发明专利

JPH0656025A PARTIALLY LOW MU ROAD DETECTING DEVICE 失效
公开(公告)号：JPH0656025A
公开(公告)日：1994-03-01
申请号：JP23540492
申请日：1992-08-11
申请人： TOYOTA MOTOR CORP , NIPPON DENSO CO
发明人： TSUCHIYA YOSHIAKI , WATANABE TAKASHI
IPC分类号： B60T8/66 , B60R16/02 , B60T8/172 , B60T8/1764 , B60T8/58 , G01N19/02
摘要： PURPOSE:To detect accurately being a partially low mu road by including a partially low mu road deciding means which decides being the partially low muroad in a case in which a measured time is within a set range, and a set time setting means which decides the set range on the basis of at least a vehicle speed and a wheel base. CONSTITUTION:A partially low mu road flag Fmu is set in a case in which two decisions of decision A and decision B are materialized. In the case of the decision A, whether vehicle wheel acceleration is in damping vibration at a proper vibration number or not is decided, and in the case of the decision B, whether a time that is from a time when front wheel slip is considered excessive to a time when rear wheel slip is considered excessive, is within a set range or not is decided. Also, decisions A and B are conducted at the initial time of anti-skid start. At S26 and S27, whether or not a decision A materialization flag FA and a decision B materialization flag FB are respectively set is decided, and in a case in which both are decided to be YES, it is decided that the partially low mu road exists.

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