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1. 发明专利

JPH04103420A SUSPENSION CONTROLLER 失效
公开(公告)号：JPH04103420A
公开(公告)日：1992-04-06
申请号：JP22285390
申请日：1990-08-23
申请人： TOYOTA MOTOR CORP , NIPPON DENSO CO
发明人： TSUTSUMI YASUHIRO , YOKOYA YUJI , HARA YOSHIMICHI , MATSUNAGA EIKI , KAWADA HIROYUKI , FUKAMI AKIRA , SUZUKI YUTAKA
IPC分类号： B60G17/015 , B60T8/66
摘要： PURPOSE:To stabilize a vehicle posture at the time of sudden brake, by setting a reference value for the occasion of a shock absorber damping force characteristic being changed to 'hard' from 'soft', large, at the sudden brake time when the operation of an ABS becomes 'ON', and conducting the changeover of damping force characteristics in the optimum mode at the time of sudden brake. CONSTITUTION:A shock absorber B damping vibration between a car body A and a car wheel C has a built-in means B2 changing a vibration damping force generation coefficient. Also, an ABS controller D prevents the lock phenomenon of the car wheel C by regulating brake pressure. As a result, an actual damping force time change rate obtained at the absorber B is detected by means of a means E2. Also, the generation of an anti lock brake system operation ON condition is watched by means of a means E1. In addition, while the above operation ON condition is being detected, a larger value is set as a reference change rate by means of a means E3. And when a detected actual change rate has surpassed the set reference change rate, the vibration damping force generation coefficient of the shock absorber is changed to 'small' by means of a means E4.

2. 发明专利

JPH03253416A SHOCK ABSORBER CONTROL DEVICE 失效
公开(公告)号：JPH03253416A
公开(公告)日：1991-11-12
申请号：JP5072790
申请日：1990-03-01
申请人： NIPPON DENSO CO , TOYOTA MOTOR CORP
发明人： SUZUKI YUTAKA , HARA YOSHIMICHI , FUKAMI AKIRA , YOKOYA YUJI , TSUTSUMI YASUHIRO
IPC分类号： B60G17/015 , F16F9/50
摘要： PURPOSE:To improve steering stability by stopping the switching of a damping force characteristic or correcting the standard range of a damping force characteristic switching means and time until returning damping force characteristic when the abnormality of a vehicle speed sensor is detected in a shock absorber control device switching the damping force characteristic according to a road surface condition. CONSTITUTION:The exceeding a standard value of the irregular condition of a road surface, detected with a road surface condition detection means M2, causes the damping force characteristic of a shock absorber M1 to be switched with a damping force characteristic switching means M4. The standard range of the standard value and/or time until returning the damping force characteristic is set by a detected vehicle speed with a standard range-time setting means M5. The detection of the abnormality of a vehicle speed detection means M3 with an abnormality detection means M6 causes an abnormality treating means M7 to stop the switching with the damping force characteristic switching means M4, or to correct a standard range and/or time until returning damping force. This constitution can ensure steering stability even at the time of vehicle speed sensor failure.

3. 发明专利

JPH03235714A DAMPING FORCE CONTROL DEVICE FOR SHOCK ABSORBER 失效
公开(公告)号：JPH03235714A
公开(公告)日：1991-10-21
申请号：JP3336690
申请日：1990-02-14
申请人： NIPPON DENSO CO , TOYOTA MOTOR CORP
发明人： SUZUKI YUTAKA , SHIOZAKI MAKOTO , ONOKI NOBUYOSHI , TAKAAI KAZUO , YOKOYA YUJI , TSUTSUMI YASUHIRO
IPC分类号： B60G17/015 , B60G17/019 , B60G17/08 , F16F9/50
摘要： PURPOSE:To prevent shock occurrence due to a sudden change of damping force at the time of the switching of a damping force characteristic by detecting the damping force of a shock absorber, and controlling the switching rate of the damping force characteristic so that the more the damping force becomes stronger the more the switching rate becomes slower according to a detected result. CONSTITUTION:In a damping force control device, a damping force variable type shock absorber M1, which can switch adamping force characteristic to at least two stages, is provided between the wheel and the body of a vehicle, and the damping force characteristic of the shock absorber M1 is switched with a damping force characteristic switching means M3 corresponding to the output of a road surface condition detection means M2 detecting the irregularity condition of a road surface. In this case, a damping force detection means M4, detecting the damping force of the shock absorber M1, is provided. The switching rate of the damping force characteristic with the damping force characteristic switching means M3 is controlled so that the more the damping force becomes stronger the more the switching rate becomes slower with a switching rate control means M5 according to detected damping force.

4. 发明专利

JPH0396415A SUSPENSION CONTROLLER 失效
公开(公告)号：JPH0396415A
公开(公告)日：1991-04-22
申请号：JP23523389
申请日：1989-09-11
申请人： TOYOTA MOTOR CORP , NIPPON DENSO CO
发明人： TSUTSUMI YASUHIRO , YOKOYA YUJI , HARA YOSHIMICHI , MATSUNAGA EIKI , KAWADA HIROYUKI , FUKAMI AKIRA , SUZUKI YUTAKA
IPC分类号： B60G17/015
摘要： PURPOSE:To prevent a vehicle from a swing in a suspension controller having a damping force variation buffer by detecting a damping force of the buffer, taking out a component of the proximity of a spring resonance frequency in the detected signals and maintaining the damping force rather high when the amplitude of the component exceeds a predetermined threshold value. CONSTITUTION:Damping force generated by respective damping force varying type shock absorbers 2FL-2RR is detected by a piezo-load sensor and inputted to an electronic controller 4 which takes out a frequency component in the proximity of a spring resonance frequency from inputted and detected damping force signals through a filter to compare the amplitude with a predetermined threshold value. When the amplitude exceeds the threshold value, the degree of damping force of the respective shock absorbers 2FL-2RR is controllably maintained rather high. Thus, a vehicle can be prevented from a swing.

5. 发明专利

JPH03208718A SUSPENSION CONTROL DEVICE 失效
公开(公告)号：JPH03208718A
公开(公告)日：1991-09-11
申请号：JP487490
申请日：1990-01-12
申请人： TOYOTA MOTOR CORP , NIPPON DENSO CO
发明人： TSUTSUMI YASUHIRO , YOKOYA YUJI , HARA YOSHIMICHI , MATSUNAGA EIKI , KAWADA HIROYUKI , FUKAMI AKIRA , SUZUKI YUTAKA
IPC分类号： B60G17/015
摘要： PURPOSE:To improve drive feeling, securing the steering stability, by fixing- controlling the suspension characteristic of at least one suspension means for a pair of wheels to a hard side, on the basis of the operation state of a vehicle which generates the tilt of vehicle attitude. CONSTITUTION:The suspension characteristic such as the damping force generation pattern and the spring constant of a suspension means M1 installed between a wheel and a car body is controlled by a means M3 on the basis of the vibration state of a vehicle wheel is detected by a means M2. In this device, the operation state of the vehicle which generates the tilt of the vehicle attitude is detected by a means M4. Further, a means M5 judges if the degree of attitude tilt which is estimated from the detected operation state of the vehicle is under a prescribed value or not. Further, when it is judged that the degree of tilt of attitude is over a prescribed value, the control to the soft side of the suspension characteristic in relation to at least one of the suspension means M1 for a pair of wheels is prohibited by a means M6.

6. 发明专利

JPH03208716A SUSPENSION CONTROL DEVICE 失效
公开(公告)号：JPH03208716A
公开(公告)日：1991-09-11
申请号：JP403590
申请日：1990-01-11
申请人： TOYOTA MOTOR CORP , NIPPON DENSO CO
发明人： TSUTSUMI YASUHIRO , YOKOYA YUJI , HARA YOSHIMICHI , MATSUNAGA EIKI , KAWADA HIROYUKI , FUKAMI AKIRA
IPC分类号： B60G17/015
摘要： PURPOSE:To improve drive feeling, securing the steering stability, by correcting the suspension characterisic of a suspension means to a hard side on the basis of the operation state of a vehicle which generates the tilt of the vehicle attitude and fixing the suspension characteristic to a hard state according to the operation state. CONSTITUTION:The suspension characteristic such as the damping force generation pattern and the spring constant of a suspension means M1 installed between a wheel and a car body is controlled by a means M3 on the basis of the vibration state of a vehicle which is detected by a means M2. In this device, the operation state of the vehicle which generates the tilt of the vehicle attitude is detected by a means M4. Further, the suspension characteristic of the suspension means M1 is corrected to a hard side as a whole by a means M5 when the degree of tilt of the attitude which is estimated from the detected operation state of the vehicle is the first standard value or more. Further, when the degree of the tilt of the attitude is over the second standard value or more, the suspension characteristic of the suspension means M1 is fixed to a hard state by a means M6 independently of the vibration state of the vehicle.

7. 发明专利

JPH03197227A SUSPENSION CONTROL DEVICE 失效
公开(公告)号：JPH03197227A
公开(公告)日：1991-08-28
申请号：JP34006889
申请日：1989-12-27
申请人： TOYOTA MOTOR CORP , NIPPON DENSO CO
发明人： TSUTSUMI YASUHIRO , YOKOYA YUJI , HARA YOSHIMICHI , MATSUNAGA EIKI , KAWADA HIROYUKI , FUKAMI AKIRA , SUZUKI YUTAKA
IPC分类号： B60G17/015
摘要： PURPOSE:To reduce the frequency of setting suspension characteristics at a soft side when the vibration of a vehicle exceeds an allowable vibration range, and increase the stability of the vehicle against a lateral force by expanding the allowable vibration range according to an increase in lateral force acting on the vehicle. CONSTITUTION:When the vibration condition of a vehicle detected with a vibration condition detection means M1 on the basis of a road condition change, exceeds an allowable vibration range, the hardness and soft characteristics of a vehicle suspension device M2 drop and the suspension characteristics thereof are set at the soft side with a characteristics setting means M3. In the aforesaid constitution, the magnitude of a lateral force F acting on the vehicle due to a lateral wind is detected with a lateral force detection means M4. Also, the allowable vibration range is so set with an allowable vibration range setting means M5 as to expand, according to an increase in lateral force F. Consequently, the frequency of setting the suspension characteristics at the soft side is lessened and the average of the suspension characteristics is shifted to the hard side. According to the aforesaid construction, the stability of the vehicle against the lateral force can be increased.

8. 发明专利

JPH03167021A SUSPENSION CONTROL DEVICE 失效
公开(公告)号：JPH03167021A
公开(公告)日：1991-07-18
申请号：JP30830589
申请日：1989-11-28
申请人： TOYOTA MOTOR CORP , NIPPON DENSO CO
发明人： TSUTSUMI YASUHIRO , YOKOYA YUJI , HARA YOSHIMICHI , MATSUNAGA EIKI , KAWADA HIROYUKI , FUKAMI AKIRA , SUZUKI YUTAKA
IPC分类号： B60G17/015
摘要： PURPOSE:To improve riding comfortableness by shortening a term to learn a criteria value for adjustment corresponding to the magnitude of vibration in the vicinity of spring upper resonance frequency in case of travelling on a compound road such as a nonpavement road having roughness and gentle rise and fall. CONSTITUTION:The damping force variable of a shockabsorber M1 mounted in the suspension S of a vehicle is detected by a means M2 and also the damping force of the shockabsorber M1 is controlled by a means M3 on the basis of the dimensional relation of the detection result and a criteria value for adjustment. In the above device, a predetermined damping force changing parameter is detected by a means M4, and also the criteria for adjustment of the means M3 is learned every predetermined term by or means M5 to make the detected value as a target value, vibration in the vicinity of spring upper resonance frequency produced in a vehicle body during travelling is detected by a means M6, and also corresponding to the magnitude of this detected value the learning term by the means M5 is shortened by a means M7.

9. 发明专利

JPH03139410A SUSPENSION CONTROL DEVICE 失效
公开(公告)号：JPH03139410A
公开(公告)日：1991-06-13
申请号：JP27757589
申请日：1989-10-25
申请人： TOYOTA MOTOR CORP , NIPPON DENSO CO
发明人： TSUTSUMI YASUHIRO , YOKOYA YUJI , HARA YOSHIMICHI , MATSUNAGA EIKI , KAWADA HIROYUKI , FUKAMI AKIRA , SUZUKI YUTAKA
IPC分类号： B60G17/015
摘要： PURPOSE:To improve the riding comfortableness and the driving stability by correcting a set value of a controlled part to a mean value side of damping force set in that condition when one road condition continues, while making a road surface detection timing quicker at the time of high speed running, in a suspension device equipped with a damping force variable shock absorber. CONSTITUTION:A rate of change of damping force of a shock absorber M1 is detected by a damping force changing rate detecting means M2, and setting of damping force is changed by a damping force control means M3 in larger or smaller relation thereof with a damping force adjustment standard value. Meanwhile, when a road surface condition detecting means M4 judges that the same road surface condition continues from the state of changing the damping force setting of the damping force control means M3, a damping force adjustment correcting means M5 corrects the damping force setting value of the damping force control means M3 to the mean value side in that state. Moreover, at the time of high speed, a road surface detection timing is advanced by a timing quickening means M6. Thus, the riding comfortableness and the driving stability can be improved.

10. 发明专利

JPH0396416A SUSPENSION CONTROLLER 失效
公开(公告)号：JPH0396416A
公开(公告)日：1991-04-22
申请号：JP23523489
申请日：1989-09-11
申请人： TOYOTA MOTOR CORP , NIPPON DENSO CO
发明人： TSUTSUMI YASUHIRO , YOKOYA YUJI , HARA YOSHIMICHI , MATSUNAGA EIKI , KAWADA HIROYUKI , FUKAMI AKIRA , SUZUKI YUTAKA
IPC分类号： B60G17/015
摘要： PURPOSE:To improve the riding comfortableness and controllability in a suspension controller having a damping force variation buffer by correcting the damping force to the average value side of the damping force on the road surface when a road surface condition is judged to being continued, while correcting the damping force to the large damping force side along the increase of vehicle speed. CONSTITUTION:A detecting means M2 detects the coefficient of variation of a damping force of a shock absorber M1 and a damping force controlling means M3 sets the damping force according to the detected coefficient and the reference value for regulation. At the same time, a road surface condition detecting means M4 detects a road surface condition from the damping setting varying condition, and when a flat or bad road is judged to being continued, a damping force correcting means M5 corrects the set damping force of the controlling means M3 to the average value side. Then, a correction amount correcting means M7 corrects the damping force to the side of increasing the damping force along with the increase of vehicle speed detected by a vehicle speed detecting means M6. Thus, the riding quality and controllability can be improved.

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