US5169215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake system
Assignee: Advics Co Ltd
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Filing: 1990-11-20
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Granted: 1992-12-08
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Expires: 2010-11-20
Abstract
Abstract A brake system wherein an auxiliary power based on a manual force is electronically controlled to control the braking force so as to obtain braking effects corresponding to a manual control input. The braking force is controlled so that a vehicle deceleration corresponding to the control input can be obtained when the control input is equal to or greater than a comparatively small predetermined control input value Lo. When the control input is smaller than Lo, the braking force is controlled so that the vehicle acceleration will not exceed a value corresponding to the control input.
Inventors
- 👤 Koji Takata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:00
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/66; B60T8/00; B60T8/24; B60T8/32; B60T8/58; Y; Y10; Y10S; Y10S303/00; Y10S303/02; Y10S303/03; Y10S303/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
285 words
A braking system for a wheeled vehicle, comprising a wheel brake means for braking a wheel; a manual control input means for manually setting a desired braking effect to be exerted by said wheel brake means, said manual control input means being manually operable to a variable quantity; a sensor means for sensing the quantity of operation of said manual control input means; a power means connected to said wheel brake means for providing braking power to said wheel brake means; a measuring means for measuring acceleration and deceleration of the vehicle, said measuring means comprising at least a wheel speed sensor; and an electronic control means for determining a target vehicle deceleration from the quantity of operation of said manual control input means sensed by said sensor means according to a predetermined relationship between the quantity of operation of said manual control input means and the target vehicle deceleration and controlling the provision of power from said power means to said wheel brake means to obtain a vehicle deceleration corresponding to said target vehicle deceleration, wherein when the quantity of operation of said manual control input means is smaller than a predetermined value L o , the braking power to said wheel brake means is controlled so that vehicle acceleration is permitted up to a predetermined acceleration value corresponding to the quantity operation of said manual control input means, and wherein when the quantity of operation of said manual control input means is greater than said predetermined value L o , the braking power to said wheel brake means is controlled so that vehicle deceleration is maintained at a predetermined deceleration value corresponding to the quantity of operation of said manual control input means.
Claim 2
Dependent Claim
285 words
A braking system for a wheeled vehicle, comprising a wheel brake means for braking a wheel; a manual control input means for manually setting a desired braking effect to be exerted by said wheel brake means, said manual control input means being manually operable to a variable quantity; a sensor means for sensing the quantity of operation of said manual control input means; a power means connected to said wheel brake means for providing braking power to said wheel brake means; a measuring means for measuring acceleration and deceleration of the vehicle, said measuring means comprising at least a wheel speed sensor; and an electronic control means for determining a target vehicle deceleration from the quantity of operation of said manual control input means sensed by said sensor means according to a predetermined relationship between the quantity of operation of said manual control input means and the target vehicle deceleration and controlling the provision of power from said power means to said wheel brake means to obtain a vehicle deceleration corresponding to said target vehicle deceleration, wherein when the quantity of operation of said manual control input means is smaller than a predetermined value L o , the braking power to said wheel brake means is controlled so that vehicle acceleration is permitted up to a predetermined acceleration value corresponding to the quantity operation of said manual control input means, and wherein when the quantity of operation of said manual control input means is greater than said predetermined value L o , the braking power to said wheel brake means is controlled so that vehicle deceleration is maintained at a predetermined deceleration value corresponding to the quantity of operation of said manual control input means.
Claim 3
Dependent Claim
31 words
The braking system of claim 1, wherein said manual control means has an operational stroke and said sensor means senses the extent of the stroke of said manual control input means.
Claim 4
Dependent Claim
35 words
The braking system of claim 1, wherein said manual control input means is operated by an applied force and said sensor means senses the amount of the force applied to said manual control input means.
Claim 5
Dependent Claim
86 words
The braking system of claim 1, wherein said measuring means comprises both said wheel speed sensor and an acceleration/deceleration sensor, said measuring means measuring the acceleration and deceleration of the vehicle from said acceleration/deceleration sensor when excessive wheel slip or wheel spin is detected by said wheel speed sensor, and said measuring means measuring the acceleration and deceleration of the vehicle and correcting said acceleration/deceleration sensor with said wheel speed sensor when excessive wheel slip or wheel spin is not detected by said wheel speed sensor.
Claim 6
Dependent Claim
52 words
The braking system of claim 1, wherein if said power means fails to provide braking power to said wheel brake means in an operation of said manual control input means, further operation of said manual control input means provides at least a partial amount of braking power to said wheel brake means.
References Cited (Backward Citations)
DE2064562A1
Cited
US3671082A
Cited
US3790225A
Cited
US4435021A
Cited
US4404633A
Cited
US4610484A
Cited
US4725953A
Cited
US4768841A
Cited
US4940291A
Cited
US4976500A
Cited
US5031968A
Cited
US5040852A
Cited
EP0429066A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-12-08 | 1996-06-08 | 1996-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-08 | 2000-06-08 | 2000-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-08 | 2004-06-08 | 2004-12-08 | $7700.00 | Window Closed / Lapsed |