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1. 发明专利

JPH02283515A FLUID PRESSURE TYPE ACTIVE SUSPENSION 失效
公开(公告)号：JPH02283515A
公开(公告)日：1990-11-21
申请号：JP10488689
申请日：1989-04-25
申请人： TOYOTA MOTOR CORP
发明人： KONDO HIROSHI , TAKEMA SHUICHI , YUYA TOSHIO , YONEKAWA TAKASHI , ONUMA TOSHIO , WATANABE TSUKASA , OSANAWA SATOSHI
IPC分类号： B60G17/015
摘要： PURPOSE:To speedily remove pressure oscillation in an actuator in a suspension for automobile by closing an opening/closing valve provided on the way of supply/discharge path of operation fluid when the frequency of oscillation exceeding a specified value of the fluid pressure in the actuator is above a reference value. CONSTITUTION:Bypass filter processing is performed with respect to a signal indicating the pressure in operation fluid chambers 2FL-2RR detected by means of pressure sensors 199FL-199RR. The present pressure and the pressure read in one cycle before and the pressure read in two cycles before are compared to a reference value to perform the following step processing and to close shut-off valves 150, 152, 154, 156 exceeds the reference value when the number that the maximum value of pressure fluctuation is attained. It is thus possible to speedily remove pressure oscillation.

2. 发明专利

JPH02227313A PRESSURE CONTROLLER FOR SUSPENSION 失效
公开(公告)号：JPH02227313A
公开(公告)日：1990-09-10
申请号：JP4951389
申请日：1989-03-01
申请人： TOYOTA MOTOR CORP
发明人： KOKUBO KOICHI , OSANAWA SATOSHI , TAKEMA SHUICHI , YUYA TOSHIO , ONUMA TOSHIO , YONEKAWA TAKASHI
IPC分类号： B60G17/015
摘要： PURPOSE:To prevent any control delay from occurring by quickening a pressure compensating information period for attitude change control and making an electric energizing means so as to be driven at time of a warp fluctuation traveling mode when an attitude change is forecasted to be quick, in a suspension pressure controller for vehicles. CONSTITUTION:Information on leveling sensors 15fl - 15rr, pressure sensors 13fl - 13rt, a speed sensor 25, acceleration sensors 16r - 16p, a steering detection means 26, etc., is inputted into a mode detecting means 17 at a specified period dt, and thereby a mode is judged. When this judged mode is a warp fluctuation mode where such an attitude change as causing a warp change in a car body is forecasted to be so quick, a pressure compensation signal for attitude change control is outputted to electric energizing means 32, 33 at a third period (dt X3 - 5) of more than the specified period dt and less than a first period. At time of stable travel mode, it is outputted by the first period (dt X 7, 8) of more than the dt. Thus, any control delay can be prevented.

3. 发明专利

JPH02212214A PRESSURE CONTROL DEVICE FOR SUSPENSION 失效
公开(公告)号：JPH02212214A
公开(公告)日：1990-08-23
申请号：JP3433289
申请日：1989-02-14
申请人： TOYOTA MOTOR CORP
发明人： OSANAWA SATOSHI , WATANABE TSUKASA , TAKEMA SHUICHI , YUYA TOSHIO , ONUMA TOSHIO , YONEKAWA TAKASHI
IPC分类号： B60G17/015
摘要： PURPOSE:To reduce fluctuation of a suspension pressure by dispersion of a piping resistance by multiplying a coefficient for compensating the dispersion of the piping resistance at a pressure supply way to each suspension by a designated pressure value to compensate the designated pressure value, and controlling a pressure control means based on an obtained value. CONSTITUTION:A pressure source 1 is provided for supplying pressure fluid to front wheel side and rear wheel side high pressure supply tubes 6, 9 reaching a suspension 100 (100fr-100rr) for each wheel, and supply and discharge of pressure fluid to/from the suspension 100 is controlled by a pressure control valve device 80 (80fr-80rr). In this case, a designating means (unillustrated) for designating a pressure to be given to the suspension 100 is provided. A coefficient for compensating dispersion of a piping resistance at a pressure supply way to the suspension 100 is set for each suspension corresponding to a connection position of the suspension 100 with the pressure source 1, and this coefficient is multiplied by a designated pressure value. The pressure control valve device 80 is thus controlled based on a compensated designated pressure value.

4. 发明专利

JPH02270618A PRESSURE CONTROL DEVICE FOR SUSPENSION 失效
公开(公告)号：JPH02270618A
公开(公告)日：1990-11-05
申请号：JP9126189
申请日：1989-04-11
申请人： TOYOTA MOTOR CORP
发明人： HAMADA TOSHIAKI , OSANAWA SATOSHI , TAKEMA SHUICHI , YUYA TOSHIO , YONEKAWA TAKASHI , ONUMA TOSHIO
IPC分类号： B60G17/015
摘要： PURPOSE:To enable a stable and highly responsive pressure control by controlling pressure control means for controlling suspension pressure in accordance with a first correction quantity based on the height deviation to a reference height, and a second correction quantity based on the changing direction of suspension pressure. CONSTITUTION:In a device in which the discharge oil of a hydraulic pump 1 is supplied through respective high pressure feed pipes 6, 9 to suspensions 100fr to 100rL for respective wheels via pressure control valves 80 (80fr to 80rL), a first correction quantity corresponding to the difference between the actual height by height sensors 15fr to 15rL provided for respective wheels and the reference height by a height indicating means is calculated by a time constant ST1. And the changing direction of suspension pressure detected by a time constant ST2 being shorter than the time constant ST1 is detected by pressure sensors 13fr to 13rL. And a second correction quantity having such a direction that when the suspension pressure is increased, it reduces the suspension pressure, while when it is decreased, it raises the suspension pressure is calculated, and the pressure control valves 80 are controlled in accordance with the above first and second correction quantities.

5. 发明专利

JPH02220147A MONITOR DEVICE FOR RUNAWAY OF DIGITAL CONTROL UNIT 失效
公开(公告)号：JPH02220147A
公开(公告)日：1990-09-03
申请号：JP4264289
申请日：1989-02-22
申请人： TOYOTA MOTOR CORP
发明人： IGUCHI HIROSHI , OSANAWA SATOSHI , YUYA TOSHIO , OHASHI KAORU
IPC分类号： G06F11/30 , G06F15/16 , G06F15/177
摘要： PURPOSE:To simplify the constitution for monitoring the runaway by stopping the output of pulses to a pulse output terminal if a 1st digital control unit is showing the abnormality of a 2nd digital control unit. CONSTITUTION:When a 2nd digital control unit 120 has a runaway, the unit 120 does not pass through a normal process route. Thus an abnormality detecting step is not carried out in the process, and the present/absent state varies for the output of signals to a communication line. When this change varies a 1st digital control unit 110, the output of pulses is stopped to a pulse output terminal. Thus a pulse monitor means 141 detects the stop of the pulse output and resets both units 110 and 120. As a result, the working state of the unit 120 is initialized and the unit 120 is automatically reset to its normal state from the runaway state. Thus just a single means 141 suffices for detection of runaways even with use of plural digital control units. Then the circuit constitution is simplified.

6. 发明专利

JPH02208109A SUSPENSION PRESSURE CONTROL DEVICE 失效
公开(公告)号：JPH02208109A
公开(公告)日：1990-08-17
申请号：JP2891589
申请日：1989-02-08
申请人： TOYOTA MOTOR CORP
发明人： WATANABE TSUKASA , OSANAWA SATOSHI , TAKEMA SHUICHI , YUYA TOSHIO , ONUMA TOSHIO , YONEKAWA TAKASHI
IPC分类号： B60G17/015
摘要： PURPOSE:To stabilize attitude control of a car body to improve riding comfortableness by compensating for suspension pressure by the sum of compensated volume which corresponds to the change in deviation from a reference height and steering angular velocity, and compensated volume which corresponds to the deviation. CONSTITUTION:A control device 18 PD feedback-controls suspension pressure by a pressure control means 80fr so that an actual car body height detected by a height detecting means 15fr conforms to a reference height specified by an indicating means 17. In this case, with D (differential) term, a gain of D term is changed to be increased when Ss is high, and to be decreased when Ss is low in accordance with the rotating speed Ss of a steering shaft detected by a rotary encoder 26, and when there is a possibility that the car body height is changed by steering, D term is acted on rapidly. Riding comfortableness is thus improved more, and attitude control of the car body can be stabilized much more.

7. 发明专利

JPH10324130A VEHICLE HEIGHT CONTROL DEVICE 失效
公开(公告)号：JPH10324130A
公开(公告)日：1998-12-08
申请号：JP13511497
申请日：1997-05-26
申请人： TOYOTA MOTOR CORP , AISIN SEIKI
发明人： MURATA MASAHIRO , OSANAWA SATOSHI
IPC分类号： B60G17/015 , B60G17/052 , G05B13/02
摘要： PROBLEM TO BE SOLVED: To always realize desired controllability by completing ascent control or descent control at the lapse time point of a fixed delay time after deviation between the vehicle level on a vehicle position and target vehicle height becomes under a fixed value, and evaluating the fixed delay time based on sprung weight movement. SOLUTION: In vehicle height control, vehicle height control beginning on one wheel position is executed until a fixed delay time elapses after the vehicle height level on the wheel position enters target vehicle height width. Evaluation of this delay time is realized by the process of genetic algorithm in the step 216 as a delay time evaluating means, based on a heap quantity HH, a roll quantity HR, and a pitch quantity HP computed by the steps 210-214 as sprung weight condition detecting means. Hereby, the delay time until completing vehicle height control can be properly renewed according to the condition of a vehicle height control device, and vehicle control can be always executed without spoiling stability of sprung weight movement, regardless of individual difference of systems and aging change.

8. 发明专利

JPH10323087A MOTOR POSITION CONTROLLER 失效
公开(公告)号：JPH10323087A
公开(公告)日：1998-12-04
申请号：JP13109397
申请日：1997-05-21
申请人： TOYOTA MOTOR CORP , AISIN SEIKI
发明人： MURATA MASAHIRO , OSANAWA SATOSHI
IPC分类号： G05B13/02 , G05D3/10 , H02P8/00
摘要： PROBLEM TO BE SOLVED: To always realize ideal controllability regardless of individual difference and secular change of a motor in a motor position controller for controlling the rotation position of motor to the target position. SOLUTION: Rotation position of a motor 10 is detected by using a potentiometer 48. An excitation current I is supplied to coils 18 to 24 for generating a rotating magnetic field in the vicinities of a permanent magnet 16, and the rotating position of the motor 10 is coincided with the target position. As the deviation between rotating position and target position becomes smaller, the exciting current I is reduced to a smaller value. The rule for varying the exciting current I as stated above is evaluated based on the controllability (quantity of overshoot, high speed) of the motor 10. The above rule is renewed as required to a rule capable of obtaining a better evaluation.

9. 发明专利

JPH04357377A DIAPHRAGM TYPE THREE-WAY DIRECTIONAL CONTROL VALVE 失效
公开(公告)号：JPH04357377A
公开(公告)日：1992-12-10
申请号：JP1690291
申请日：1991-01-18
申请人： AISIN SEIKI , TOYOTA MOTOR CORP
发明人： OSHITA MORIHITO , OSANAWA SATOSHI , INAYOSHI HIDETOSHI , HIRAIWA NOBUO , YASUIKE OSAMU
IPC分类号： F16K11/044 , F16K31/06
摘要： PURPOSE:To bring a valve into close contact with a valve seat when perpendicularity between a valve assembly and the valve seat is imprecisely established. CONSTITUTION:A valve assembly 10 has a spherical part 20 formed on its shank, and the spherical part 20 is supported by the bearing part of a seat-upper 15. The spherical part 20 is provided so that the valve assembly 10 may somewhat incline with the spherical part 20 as a center even when perpendicularity between the seat-upper 15 and the valve assembly 10 is imprecise. Thus even in the case where perpendicularity between the valve assembly and a bearing is imprecise, the valve of the valve assembly inclines with the spherical part as a center so as to fit with the valve seat, and makes close contact with the valve seat.

10. 发明专利

JPH02286414A HYDRAULIC PRESSURE TYPE ACTIVE SUSPENSION 失效
公开(公告)号：JPH02286414A
公开(公告)日：1990-11-26
申请号：JP11058589
申请日：1989-04-28
申请人： TOYOTA MOTOR CORP
发明人： ONUMA TOSHIO , TAKEMA SHUICHI , YUYA TOSHIO , YONEKAWA TAKASHI , KOKUBO KOICHI , SUGIYAMA TAKAMI , OSANAWA SATOSHI
IPC分类号： B60G17/015
摘要： PURPOSE:To prevent a change in the posture of a vehicle body accompanying abrupt turning after travelling a rough road by setting the amount of correction to a lower value as the pressure in a working fluid supply line is reduced when a vehicle travels in straight-forward direction, and also setting it to a specified value according to the traveling condition of the vehicle when the vehicle is turned. CONSTITUTION:A high-pressure flow line 18 connected to the delivery side of a pump 6 is branched into high-pressure flow line 18F for a front wheel and high-pressure flow line 18R for a rear wheel. Working fluid chambers 2FR to 2RL for actuators 1FR to 1RL are connected to the flow lines 18F and 18R through high-pressure flow liens 18FR to 18RL for wheels in which pressure control valves 32 to 38 are provided, respectively. The pressure control valves 32 to 38 are controlled by a controller(not shown in the figure). In this case, the pressure control valves 32 to 38 are controlled utilizing the amount of correction according to the traveling condition of a vehicle. Also, when the vehicle is detected to be substantially in straight-forward direction, the pressure control valves 32 to 38 are so controlled that the cower the working fluid pressure detected by pressure detectors 197 and 198 is, the more the above- mentioned amount of correction is reduced.

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