US4613154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle suspension apparatus
Assignee: Mitsubishi Motors Corp
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Filing: 1985-08-02
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Granted: 1986-09-23
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Expires: 2005-08-02
Abstract
Abstract Air spring chambers are provided in suspension units of respective wheels, and air intake solenoid valves and exhaust solenoid valves are provided corresponding to the air spring chambers. Further, switching means for switching the suspension units between the hard and soft states is provided, and when the vehicle's velocity, detected by the vehicle velocity sensors, is less than the set velocity, the suspension units are set to the soft state, and when the vehicle's velocity is the set velocity or higher, the suspension units are set to the hard state to control the switching means in a vehicle suspension apparatus.
Inventors
- 👤 Tadao Tanaka
- 👤 Mitsuhiko Harara
- 👤 Yasutaka Taniguchi
- 👤 Masanaga Suzumura
- 👤 Minoru Tatemoto
- 👤 Naotake Kumagai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:09
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/015; B60G17/016; Y; Y10; Y10S; Y10S280/00; Y10S280/01
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
211 words
A vehicle suspension apparatus comprising: fluid spring chambers provided at both right and left suspension units; fluid supply means for supplying fluid through supply control valves to the fluid spring chambers of the suspension units; fluid exhaust means for exhausting the fluid through exhaust control valves from the fluid spring chambers of the suspension units; roll detecting means for detecting a roll of a vehicle body; roll control means for reducing said roll of the vehicle body by opening the supply control valve for the fluid spring chamber on the compressed side and opening the exhaust control valve for the fluid spring chamber on the elongated side during the set control period of time on the basis of a signal from the roll detecting means; hard/soft switching means provided in the suspension units for switching the suspension units to either the hard or soft state; running state detecting means for detecting the running state of the vehicle; and hard/soft control means for controlling the hard/soft switching means so that the suspension units become soft when the running state detected by the running state detecting means satisfies the set condition and controlling the hard/soft switching means so that the suspension units become hard when the running state does not satisfy the conditions.
Claim 2
Dependent Claim
211 words
A vehicle suspension apparatus comprising: fluid spring chambers provided at both right and left suspension units; fluid supply means for supplying fluid through supply control valves to the fluid spring chambers of the suspension units; fluid exhaust means for exhausting the fluid through exhaust control valves from the fluid spring chambers of the suspension units; roll detecting means for detecting a roll of a vehicle body; roll control means for reducing said roll of the vehicle body by opening the supply control valve for the fluid spring chamber on the compressed side and opening the exhaust control valve for the fluid spring chamber on the elongated side during the set control period of time on the basis of a signal from the roll detecting means; hard/soft switching means provided in the suspension units for switching the suspension units to either the hard or soft state; running state detecting means for detecting the running state of the vehicle; and hard/soft control means for controlling the hard/soft switching means so that the suspension units become soft when the running state detected by the running state detecting means satisfies the set condition and controlling the hard/soft switching means so that the suspension units become hard when the running state does not satisfy the conditions.
Claim 3
Dependent Claim
79 words
An apparatus according to claim 1, wherein said running state detecting means comprises a vehicle velocity sensor for detecting the vehicle's velocity, said hard/soft control means controls said hard/soft switching means so that said suspension units become soft when the vehicle's velocity, detected by said vehicle velocity sensor, satisfies the condition that it is less than a set velocity, said hard/soft switching means so that said suspension units become hard when the vehicle's velocity does not satisfy said condition.
Claim 4
Dependent Claim
80 words
An apparatus according to claim 1, wherein said running state detecting means comprises an acceleration sensor for detecting the lateral acceleration acting on the vehicle body, said hard/soft control means controls said hard/soft switching means so that said suspension units become soft when the acceleration, detected by said acceleration sensor, satisfies the condition that it is less than the set acceleration, said hard/soft switching means so that said suspension units become hard when the acceleration does not satisfy the condition.
Claim 5
Dependent Claim
33 words
An apparatus according to claim 1, wherein said roll control means comprises control time setting means for setting said control time on the basis of the detection signal of said roll detecting means.
Claim 6
Dependent Claim
76 words
An apparatus according to claim 4, wherein said running state detecting means detects the control time set by said control time setting means, said hard/soft control means controls said hard/soft switching means so that said suspension units become soft when satisfying the condition that the control time detected by said running state detecting means is less than the set time, said soft/hard switching means so that said suspension units become hard when not satisfying the condition.
Claim 7
Dependent Claim
79 words
An apparatus according to claim 4, wherein said roll detecting means comprises: steering state detecting means for detecting steering angle and/or steering angular velocity; and vehicle velocity detecting means for detecting the vehicle's velocity, said control time setting means in said roll control means sets said control time on the basis of the steering angle and/or steering angular velocity detected by said steering state detecting means as well as the vehicle's velocity detected by said vehicle velocity detecting means.
Claim 8
Dependent Claim
90 words
An apparatus according to claim 6, wherein said control time setting means in said roll control means comprises: first control time setting means for setting said control time on the basis of the steering angle detected by said steering state detecting means and the vehicle's velocity detected by said vechile velocity detecting means; and second control time setting means for setting said control time on the basis of the steering angular velocity detected by said steering state detecting means and the vehicles' velocity detected by said vehicle velocity detecting means.
Claim 9
Dependent Claim
36 words
An apparatus according to claim 7, wherein said roll control means sets the control time by said second control time setting means when the control time set by said first control time setting means is zero.
Claim 10
Dependent Claim
63 words
An apparatus according to claim 7, wherein said roll control means sets the control time by said first control time setting means when the steering angular velocity detected by said steering state detecting means is less than the set value and sets the control time by said second control time setting means when the steering angular velocity is the set value or higher.
Claim 11
Dependent Claim
96 words
An apparatus according to claim 7, wherein said running state detecting means comprises means for detecting that the control time is set by any of said first and second control time setting means of said roll control means, said hard/soft control means controls said hard/soft switching means so that said suspension units become soft when satisfying the condition that the control time setting means detected by said running state detecting means is said first control time setting means and controls said hard/soft switching means so that said suspension units become hard when not satisfying the condition.
Claim 12
Dependent Claim
114 words
An apparatus according to claim 7, wherein said running state detecting means comprises: vehicle velocity sensor for detecting the vehicle's velocity; and means for detecting that the control time is set by any of said first and second control time setting means of said roll control means, said hard/soft control means controls said hard/soft switching means so that said suspension units become soft when satisfying the condition that the control time setting means detected by said running state detecting means is said first control time setting means and the detected vehicle velocity is less than the set value, said hard/soft switching means so that said suspension units become hard when not satisfying the condition.
Claim 13
Dependent Claim
114 words
An apparatus according to claim 7, wherein said running state detecting means comprises: vehicle velocity sensor for detecting the vehicle's velocity; and means for detecting that the control time is set by any of said first and second control time setting means of said roll control means, said hard/soft control means controls said hard/soft switching means so that said suspension units become soft when satisfying the condition that the control time setting means detected by said running state detecting means is said first control time setting means or the detected vehicle velocity is less than the set value, said hard/soft switching means so that said suspension units become hard when not satisfying the condition.
Claim 14
Dependent Claim
127 words
An apparatus according to claim 7, wherein said running state detecting means comprises: means for detecting that the control time is set by any of said first and second control time setting means of said roll control means; and means for detecting the control time set by said first or second control time setting means of said roll control means, said hard/soft control means controls said hard/soft switching means so that said suspension units become soft when satisfying the condition that the control time setting means detected by said running state detecting means is said first control time setting means and the detected control time is less than the set value, said hard/soft switching means so that said suspension units become hard when not satisfying the condition.
Claim 15
Dependent Claim
127 words
An apparatus according to claim 7, wherein said running state detecting means comprises: means for detecting that the control time is set by any of said first and second control time setting means of said roll control means; and means for detecting the control time set by said first or second control time setting means of said roll control means, said hard/soft control means controls said hard/soft switching means so that said suspension units become soft when satisfying the condition that the control time setting means, detected by said running state detecting means, is said first control time setting means or the detected control time is less than the set value, said hard/soft switching means so that said suspension units become hard when not satisfying the condition.
Claim 16
Dependent Claim
118 words
An apparatus according to claim 7, wherein said running state detecting means comprises: an acceleration sensor for detecting the lateral acceleration acting on the vehicle body; and means for detecting that the control time is set by any of said first and second time control means of said roll control means, said hard/soft control means controls said hard/soft switching means so that said suspension units become soft when satisfying the condition that the control time setting means detected by said running state detecting means is said first control time setting means and the detected lateral acceleration is less than the set value, said hard/soft switching means so that said suspension units become hard when not satisfying the condition.
Claim 17
Dependent Claim
118 words
An apparatus according to claim 7, wherein said running state detecting means comprises: an acceleration sensor for detecting the lateral acceleration acting on the vehicle body; and means for detecting that the control time is set by any of said first and second time control means of said roll control means, said hard/soft control means controls said hard/soft switching means so that said suspension units become soft when satisfying the condition that the control time setting means detected by said running state detecting means is said first control time setting means or the detected lateral acceleration is less than the set value, said hard/soft switching means so that said suspension units become hard when not satisfying the condition.
Claim 18
Dependent Claim
50 words
An apparatus according to claim 1, further comprising: hard selection switch, and wherein said hard/soft control means controls said hard/soft switching means so that said suspension units become hard irrespective of the running state detected by said running state detecting means when receiving a signal from said hard selection switch.
Claim 19
Dependent Claim
17 words
An apparatus according to claim 1, wherein said hard/soft control means has a controller having a microcomputer.
Claim 20
Dependent Claim
19 words
An apparatus according to claim 1, wherein said hard/soft switching means switches the damping forces of said suspension units.
Claim 21
Dependent Claim
19 words
An apparatus according to claim 1, wherein said hard/soft switching means switches the spring forces of said suspension units.
Claim 22
Dependent Claim
23 words
An apparatus according to claim 1, wherein said hard/soft switching means switches the spring forces and the damping forces of said suspension units.
References Cited (Backward Citations)
US3608925A
Cited
US3770292A
Cited
US3848862A
Cited
JPS5326021A
Cited
DE2848286A1
Cited
GB2009062A
Cited
JPS5830818A
Cited
JPS58218410A
Cited
JPS5973311A
Cited
US4506751A
Cited
US4568096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-22 | 1990-03-24 | 1990-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-22 | 1994-03-24 | 1994-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-22 | 1998-03-24 | 1998-09-23 | $7700.00 | Window Closed / Lapsed |