Antiskid system featuring brake pressure dump limiting as a function of runway coefficient
Abstract
Abstract THIS INVENTION RELATES TO A BRAKE CONTROL SYSTEM FOR VEHICLES, AND MORE PARTICULARLY TO SYSTEMS FOR VEHICLES HAVING SEVERAL INDEPENDENTLY ROTATABLE LOAD-BEARING WHEELS EACH OF WHICH IS EQUIPPED WITH A RESPECTIVE UNIT COMPRISING A BRAKE AND A BRAKE APPLYING MEANS. THE PARTICULAR CHARACTERISTICS OF THIS INVENTION ARE TO APPLY SKID CONTROL TECHNIQUES UTILIZING A MODULATING VOLTAGE TO GRADUALLY RESTORE DUMPED PRESSURE BACK TO AS NEAR MAXIMUM PRESSURE AS POSSIBLE WITHOT IMMEDIATELY CREATING ANOTHER SKID CONDITION, AND WHICH UNIT MORE RAPIDLY AND ACCURATELY LIMITS BRAKE PRESSURE DUMP AS A FUNCTION OF RUNWAY COEFFICIENT. A CONTROL CIRCUIT IS PROVIDED BETWEEN THE MODULATOR AND AMPLIFIER SO THAT AS THE MODULATOR LEVEL INCREASES, IT REDUCES THE LEVEL OF THE FEEDBACK VOLTAGE WITHIN THE AMPLIFIER SO THAT MORE SKID SIGNAL VOLTAGE IS APPLIED TO THE VALVE AND THE PRESSURE DUMP IS GREATER. ON EXTREMELY LOW COEFFICIENT RUNWAY SURFACES, THE MODULATOR SIGNAL LEVEL WILL BE HIGH, BECAUSE THE SKID DETECTOR SIGNALS ARE WIDER, AND PRACTICALLY FULL DUMP OF THE BRAKE PRESSURE WILL BE ALLOWED.
Inventors
- 👤 John R Steigerwald
Bibliographic Details
Claims Analysis
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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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |