Patent US4786066A successfully refreshed from Google Patents.
US4786066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rear wheels steering apparatus for vehicles
Assignee: MADA MOTOR Corp
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Filing: 1988-02-01
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Granted: 1988-11-22
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Expires: 2008-02-01
Abstract
Abstract A rear wheels steering apparatus for vehicles including a left rear wheel steering device capable of shifting a left rear wheel in a toe-in direction, a right rear wheel steering device capable of shifting a right wheel in a toe-in direction, a steering operation detecting device for detecting a steering stage of the front wheels of the vehicle and a toe control device for actuating one of the left and right rear wheel steering devices to shift one of the left and right rear wheels in a toe-in direction at an initial steering stage of the front wheels in accordance with a detected signal of the steering operation detecting device and actuating at least the other of the left and right rear wheel steering devices to shift the other of the left and right rear wheels in a toe-in direction at a later steering stage of the front wheels in accordance with a detected signal of the steering operation detecting device. The apparatus permits to make it possible to meet requirements for different steering characteristics required at each steering stage of the front wheels for various kinds of vehicles.
Inventors
- 👤 Toshiro Kondo
- 👤 Tadanobu Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:34
CPC Classifications
B; B62; B62D; B62D7/00; B62D7/06; B62D7/14; B62D7/15; B62D7/159
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
160 words
A rear wheels steering apparatus for a vehicle comprising left rear wheel steering means capable of shifting a left rear wheel in a toe-in direction, right rear wheel steering means capable of shifting a right rear wheel in a toe-in direction, steering operation detecting means for detecting a steering stage of the front wheels of said vehicle and toe control means for actuating one of said left and right rear wheel steering means to shift only one of said left and right rear wheels in a toe-in direction at an initial steering stage of said front wheels in accordance with a detected signal of said steering operation detecting means and actuating at least the other of said left and right rear wheel steering means to shift the other of said left and right rear wheels in a toe-in direction at a later steering stage of said front wheels in accordance with a detected signal of said steering operation detecting means.
Claim 2
Dependent Claim
160 words
A rear wheels steering apparatus for a vehicle comprising left rear wheel steering means capable of shifting a left rear wheel in a toe-in direction, right rear wheel steering means capable of shifting a right rear wheel in a toe-in direction, steering operation detecting means for detecting a steering stage of the front wheels of said vehicle and toe control means for actuating one of said left and right rear wheel steering means to shift only one of said left and right rear wheels in a toe-in direction at an initial steering stage of said front wheels in accordance with a detected signal of said steering operation detecting means and actuating at least the other of said left and right rear wheel steering means to shift the other of said left and right rear wheels in a toe-in direction at a later steering stage of said front wheels in accordance with a detected signal of said steering operation detecting means.
Claim 3
Dependent Claim
62 words
A rear wheels steering apparatus in accordance with claim 1 in which said toe control means actuates one of said left and right rear wheel steering means which steers an inner rear wheel with respect to the turning direction of said vehicle to shift said inner rear rear wheel in a toe-in direction at said initial steering stage of said front wheels.
Claim 4
Dependent Claim
56 words
A rear wheels steering apparatus in accordance with claim 2 in which said toe control means actuates the other of said left and right rear wheel steering means to shift an outer rear wheel with respect to the turning direction of said vehicle in a toe-in direction at said later steering stage of said front wheels.
Claim 5
Dependent Claim
55 words
A rear wheels steering apparatus in accordance with claim 3 in which said toe control means further actuates said one of said left and right rear wheel steering means which steers said inner rear wheel to shift said inner rear wheel to a neutral toe position at said later steering stage of said front wheels.
Claim 6
Dependent Claim
54 words
A rear wheels steering apparatus in accordance with claim 3 in which said toe control means further actuates said one of said left and right rear wheel steering means which steers said inner rear wheel to shift said inner rear wheel in a toe-in direction at said later steering stage of said front wheels.
Claim 7
Dependent Claim
62 words
A rear wheels steering apparatus in accordance with claim 1 in which said toe control means actuates one of said left and right rear wheel steering means which steers an outer rear wheel with respect to the turning direction of said vehicle to shift said outer rear rear wheel in a toe-in direction at said initial steering stage of said front wheels.
Claim 8
Dependent Claim
56 words
A rear wheels steering apparatus in accordance with claim 6 in which said toe control means actuates the other of said left and right rear wheel steering means to shift an inner rear wheel with respect to the turning direction of said vehicle in a toe-in direction at said later steering stage of said front wheels.
Claim 9
Dependent Claim
55 words
A rear wheels steering apparatus in accordance with claim 7 in which said toe control means further actuates said one of said left and right rear wheel steering means which steers said outer rear wheel to shift said outer rear wheel to a neutral toe position at said later steering stage of said front wheels.
Claim 10
Dependent Claim
54 words
A rear wheels steering apparatus in accordance with claim 7 in which said toe control means further actuates said one of said left and right rear wheel steering means which steers said outer rear wheel to shift said outer rear wheel in a toe-in direction at said later steering stage of said front wheels.
Claim 11
Dependent Claim
22 words
A rear wheels steering apparatus in accordance with claim 3 in which said steering operation detecting means is a steering angle sensor.
Claim 12
Dependent Claim
98 words
A rear wheels steering apparatus in accordance with claim 10 in which said toe control is carried out by said toe control means at said initial steering stage of said front wheels when a steering angle detected by said steering operation detecting means is more than a first predetermined angle and is less than a second predetermined angle and the toe control is carried out by said toe control means at said later steering stage of said front wheels when the steering angle detected by said steering operation detecting means is not less than the second predetermined angle.
Claim 13
Dependent Claim
47 words
A rear wheels steering apparatus in accordance with claim 11 in which said toe control is carried out by said toe control means in such a manner that a toe direction of the rear wheels is changed linearly in accordance with an increase in the steering angle.
Claim 14
Dependent Claim
22 words
A rear wheels steering apparatus in accordance with claim 3 in which said steering operation detecting means is a lateral acceleration sensor.
Claim 15
Dependent Claim
100 words
A rear wheels steering apparatus in accordance with claim 13 in which the toe control is carried out by said toe control means at said initial steering stage of said front wheels when a steering angle detected by said steering operation detecting means is more than a first predetermined angle and is less than a second predetermined angle and in which the toe control is carried out by said toe control means at said later steering stage of said front wheels when a steering angle detected by said steering operation detecting means is not less than the second predetermined angle.
Claim 16
Dependent Claim
44 words
A rear wheels steering apparatus in accordance with claim 14 in which said toe control is carried out by said toe control means in such a manner that the toe direction of the rear wheels is changed linearly in accordance with passage of time.
Claim 17
Dependent Claim
22 words
A rear wheels steering apparatus in accordance with claim 7 in which said steering operation detecting means is a steering angle sensor.
Claim 18
Dependent Claim
100 words
A rear wheels steering apparatus in accordance with claim 16 in which the toe control is carried out by said toe control means at said initial steering stage of said front wheels when a steering angle detected by said steering operation detecting means is more than a first predetermined angle and is less than a second predetermined angle and in which the toe control is carried out by said toe control means at said later steering stage of said front wheels when a steering angle detected by said steering operation detecting means is not less than the second predetermined angle.
Claim 19
Dependent Claim
47 words
A rear wheels steering apparatus in accordance with claim 17 in which said toe control is carried out by said toe control means in such a manner that the toe direction of the rear wheels is changed linearly in accordance with an increase in the lateral acceleration.
Claim 20
Dependent Claim
22 words
A rear wheels steering apparatus in accordance with claim 7 in which said steering operation detecting means is a lateral acceleration sensor.
Claim 21
Dependent Claim
100 words
A rear wheels steering apparatus in accordance with claim 19 in which the toe control is carried out by said toe control means at said initial steering stage of said front wheels when a steering angle detected by said steering operation detecting means is more than a first predetermined angle and is less than a second predetermined angle and in which the toe control is carried out by said toe control means at said later steering stage of said front wheels when a steering angle detected by said steering operation detecting means is not less than the second predetermined angle.
Claim 22
Dependent Claim
45 words
A rear wheels steering apparatus in accordance with claim 20 in which said toe control is carried out by said toe control means in such a manner that the toe direction of the rear wheels is changed linearly in accordance with the passage of time.
References Cited (Backward Citations)
JPS5340929A
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US4335800A
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US4315555A
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JPS60259572A
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JPS61200064A
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EP0223256A2
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-22 | 1992-05-23 | 1992-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-22 | 1996-05-23 | 1996-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-22 | 2000-05-23 | 2000-11-22 | $7700.00 | Window Closed / Lapsed |