US3883186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-lock control system
Assignee: Robert Bosch GmbH
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Filing: 1973-12-14
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Granted: 1975-05-13
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Expires: 1993-12-14
Abstract
Abstract An anti-lock control system for the wheel brakes of a vehicle over a desired speed range comprises a device for producing a reference value related to the speed of the vehicle and a value dependent on the wheel speed such that each value is formed by a constant part and a speed dependent part, with the constant part of the reference value being smaller than that of the wheel speed dependent value and when each value is plotted against speed, curves are obtained having slopes of the same sign, the curves not intersecting within the desired speed range in the absence of slip, the variation of the pressure in the associated wheel brakes being controlled when the wheel speed dependent value drops below the reference value.
Inventors
- 👤 Anton Rodi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:42
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/176; B60T8/1761; B60T8/17613; B60T8/1763; B60T8/17633
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
202 words
An anti-lock control system for the wheel brakes of vehicles over a desired speed range, comprising: a. first means for generating vehicle speed-dependent reference values each composed of a constant value portion and a vehicle speed-dependent value portion and forming, when plotted against vehicle speed, a reference value curve having a slope of a paRticular sign; b. second means for generating wheel speed-dependent values as a function of the speed of a given wheel of the vehicle, each wheel speed-dependent value being composed of a constant value portion larger than said constant value portion of the vehicle speed-dependent reference values and a value portion dependent upon the speed of said given wheel, said wheel speed-dependent values forming, when plotted against vehicle speed, a wheel speed-dependent value curve having the same sign as said reference value curve and not intersecting said reference value curve in said desired speed range in the absence of slip of said given wheel; c. comparison means for comparing said reference values with said wheel speed-dependent values; and d. control means responsive to said comparison means for varying the brake pressure at the wheel brake of said given wheel when the wheel speed-dependent value falls below the reference value.
Claim 2
Dependent Claim
202 words
An anti-lock control system for the wheel brakes of vehicles over a desired speed range, comprising: a. first means for generating vehicle speed-dependent reference values each composed of a constant value portion and a vehicle speed-dependent value portion and forming, when plotted against vehicle speed, a reference value curve having a slope of a paRticular sign; b. second means for generating wheel speed-dependent values as a function of the speed of a given wheel of the vehicle, each wheel speed-dependent value being composed of a constant value portion larger than said constant value portion of the vehicle speed-dependent reference values and a value portion dependent upon the speed of said given wheel, said wheel speed-dependent values forming, when plotted against vehicle speed, a wheel speed-dependent value curve having the same sign as said reference value curve and not intersecting said reference value curve in said desired speed range in the absence of slip of said given wheel; c. comparison means for comparing said reference values with said wheel speed-dependent values; and d. control means responsive to said comparison means for varying the brake pressure at the wheel brake of said given wheel when the wheel speed-dependent value falls below the reference value.
Claim 3
Dependent Claim
45 words
A system as defined in claim 1, wherein said first means includes storage means having a rapid charging rate and a slow discharge rate, said storage means being connected to said second means for receiving from said second means signals having said wheel speed-dependent values.
Claim 4
Dependent Claim
41 words
A system as defined in claim 1, wherein said first means for generating said reference values and said second means for generating said wheel speed-dependent values include means for providing said speed-dependent value portions in linear dependence on the wheel speed.
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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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |