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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

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.

4. 发明专利

JPH04113911A SUSPENSION CONTROLLING DEVICE 失效
公开(公告)号：JPH04113911A
公开(公告)日：1992-04-15
申请号：JP23397390
申请日：1990-09-03
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 control a vibration damping means of a vehicle in a mode to match the total running characteristics of the vehicle by changing the damping force of a sock absorber corresponding to the condition of a running characteristics control system of the vehicle. CONSTITUTION:A vehicle has a four wheel steering system 2 which can be changed between a normal mode and a sports mode, and a running characteristics control system 100 equipped with various systems 4-10. It also has a shock absorber 300 of which damping force characteristics can be changed, and a sock absorber controller 200 for changing the damping force characteristics. In this constitution, a means 400 for inputting a signal for indicating a condition into which the running characteristics control system 100 of the vehicle is changed to the controller 200 is added. The controller 200 also includes a memorizing means 202 to memorize changing procedures 1-4 for changing the damping force characteristics of the shock absorber 300 in a corresponding mode to the signal inputted from the inputting means 400.

5. 发明专利

JPH03132414A SUSPENSION CONTROL DEVICE 失效
公开(公告)号：JPH03132414A
公开(公告)日：1991-06-05
申请号：JP26982789
申请日：1989-10-16
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 secure superb riding comfort and prevent impact by keeping damping force high when a springing resonance component signal out of this damping force is larger than the threshold value and an unspringing resonance component signal is smaller than the threshold value. CONSTITUTION:The vibrational change of a vehicle based on the phase change of the road surface is detected to alter the damping force characteristic of a shock absorber M1 in order to suppress the vibration of a body. In this case, the damping force generated to the shock absorber M1 is detected at a means M2, and out of the detected damping force components, a frequency component in the vicinity of springing resonance frequency is extracted by a means M3. In the same way, a frequency component in the vicinity of unspringing resonance frequency is extracted by a means M4. When a springing resonance component signal is larger than the threshold value, and an unspringing resonance signal is larger than the threshold value, and an unspringing resonance component signal is smaller than this threshold value, the damping force of the shock absorber M1 is kept high by a means M5.

6. 发明专利

JPH0396413A SUSPENSION CONTROLLER 失效
公开(公告)号：JPH0396413A
公开(公告)日：1991-04-22
申请号：JP23523189
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 , F16F9/50
摘要： PURPOSE:To improve riding comfortableness and controllability in a suspension controller having a damping force varying buffer by correcting a set damping force to the average side of the set damping force on the road surface condition according to deviation from the target frequency of variation degree of parameter related with the damping force. CONSTITUTION:The coefficient of variation of a damping force of a shock absorber M1 is detected by a detecting means M2 and the damping force is set by a damping force controlling means M3. On the other hand, a frequency detecting means M4 detects the variation frequency of a parameter related with the damping force, and a frequency deviation calculating means M5 figures out the deviation from the target frequency. A damping force regulating- correcting means M7 corrects a value set by the damping force controlling means 3 to the average value side of each damping force set on a flat or bad road on the basis of the road surface condition and frequency deviation detected by a road surface condition detecting means M6. Thus, the controllability and riding comfortableness can be improved.

7. 发明专利

JPH03239617A SHOCK ABSORBER CONTROL DEVICE 失效
公开(公告)号：JPH03239617A
公开(公告)日：1991-10-25
申请号：JP3684790
申请日：1990-02-16
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 , B60G17/019 , F16F9/50
摘要： PURPOSE:To improve riding comfortableness and maneuvering stability by detecting a corresponding road surface state to each shock absorber so as to obtain a detection characteristic for each shock absorber, and individually correcting a reference value or a detection value in accordance with the characteristic. CONSTITUTION:Road surface state detecting means M2a-M2d provided corre sponding to respective shock absorbers M1a-M1d detect a road surface state to transmit to a damping force characteristic switching means M3 and to a correcting means M4. The correcting means M4 obtains detection characteristics of the respective detecting means M2a-M2d on the basis of the respective road surface state detection values, and individually corrects reference values or the road surface state detection values of the damping force characteristic switching means M3a-M3d in accordance with the detection characteristics. The switching means M3a-M3d compares the reference values and the detection values based on the results to change over individually the damping force characteristics of the respective shock absorbers M1a-M1d. According to this constitution, riding comfortableness as well as maneuvering stability is improved.

8. 发明专利

JPH03204325A SUSPENSION CONTROL UNIT 失效
公开(公告)号：JPH03204325A
公开(公告)日：1991-09-05
申请号：JP34137089
申请日：1989-12-29
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 stability by switching a control carried out by means of a vibration condition control means from independent control for each wheel, into a control in which a pair of, left and right, wheels are synchronized, when acceleration and/or braking conditions of a vehicle are detected. CONSTITUTION:The vibration condition control means M3 of each wheel M2 changes characteristics such as damping force, spring constant, etc., of a vehicle supension device (shockabsorber) in compliance with the vibration condition detected by vibration condition detection means M1 and controls the vibration condition of a vehicle independently of each wheel M2 during traveling. Hereupon, when a traveling condition detection means M4 detects acceleration condition and/or braking condition of the vehicle, a left and right wheel synchronous control means M5 switches control carried out by means of the vibration condition control means M3 into control in which a pair of, left and right, wheels M2R, M2L are synchronized independently of each wheel M2. In this manner, characteristics of the damping force, the spring constant, etc., of the left and right wheels are generally equalized, so that driving force and braking force become equal in left and right wheels to be able to obtain good stability of the vehicle.

9. 发明专利

JPH03148317A SUSPENSION CONTROLLER 失效
公开(公告)号：JPH03148317A
公开(公告)日：1991-06-25
申请号：JP28685989
申请日：1989-11-02
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 impact surely, by extracting an on-spring resonance component from the detection signal of a vibration condition generated at a vehicle, and practicing the prevention of impact in the case of this on-spring resonance component having become out of an allowable range that is determined according to a car speed. CONSTITUTION:The above suspension controller is equipped with a vibration condition detecting means M1 which detects the condition of vibration generated at a vehicle due to the change of a road surface, and changes the damping force characteristic of a shock absorber M2 on the basis of its detection signal, and restrains the vibration of a car body. In this instance, provided are an on-spring resonance component extracting means M3 which extracts the vicinity frequency component of an on-spring resonance frequency from the vibration condition detection signal, and a car speed detecting means M4. And the allowable range of the size of the on-spring resonance component is operated by means of an allowable range operating means M5 according to a car speed, and at the same time, in the case of the extracted on-spring resonance component having become out of the allowable range, it is so arranged that the damping force degree of the shock absorber M2 is heightened by means of a high damping force maintaining means M6.

10. 发明专利

JPH0396414A SUSPENSION CONTROLLER 失效
公开(公告)号：JPH0396414A
公开(公告)日：1991-04-22
申请号：JP23523289
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 , F16F9/50
摘要： PURPOSE:To improve the controllability and riding comfortableness in a suspension controller provided with a damping force varying buffer by judging a road surface condition according to the damping force variation condition set by damping force controlling means to correct the setting of the damping force to the average value side of set values of the respective road surfaces when a flat or bad road is judged to be continued. CONSTITUTION:A damping force variation coefficient detecting means M2 detects the coefficient of variation of the damping force of a shock absorber M1, and a damping force controlling means M3 compares it with a reference value for regulation to vary the set value of the damping force of the shock absorber M1, while a road surface condition detecting means M4 judges the road surface condition from the damping force setting varying condition of the damping force controlling means M3, and when a flat or bad road is judged to be continued, a damping force regulating-correcting means M5 corrects the set value of the controlling means M3 to the average value side of set values on the respective road surfaces. Thus, the riding comfortableness and controllability are improved.

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