US3659907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for detecting slippage of wheels of vehicles
Assignee: Robert Bosch GmbH
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Filing: 1969-12-04
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Granted: 1972-05-02
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Expires: 1989-12-04
Abstract
Abstract A slippage detecting system for use in conjunction with motor vehicles. Each wheel of the vehicle is provided with a transducer which supplies a voltage dependent upon the speed of the wheel. The transducer output is applied to a Schmitt-trigger circuit which becomes actuated when the voltage exceeds a predetermined value. Upon actuation of the Schmitt-trigger circuit, the braking system of the motor vehicle is operated through an amplifier, so that the braking force is regulated to prevent locking of the wheels. The transducer is in the form of a voltage generator with regulated excitation voltage. The voltage regulator includes an integrator and is connected between the output of the generator and the excitation winding thereof.
Inventors
- 👤 Peter Gunsser
- 👤 Richard Zechnall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:08
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/172; G; G01; G01P; G01P15/00; G01P15/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
220 words
An arrangement for detecting the slipping or locking of at least one wheel on a surface, comprising, in combination, alternating current voltage generating means mechanically coupled to said wheel for providing an alternating current voltage dependent upon the speed of said wheel; rectifying means connected to the output of said alternating current voltage generating means for rectifying the alternating current voltage of said generating means to provide at its output a pulsating direct current voltage; integrating means having an input connected to the output of said alternating current voltage generating means and to the output of said rectifying means; voltage regulating means having an input connected to the output of said integrating means and an output connected to the input of said rectifying means for maintaining substantially constant the voltage output of said alternating current voltage generating means except for sudden changes in the speed of said wheel associated with slipping or locking of the same; and signal processing means connected to the output of said rectifying means, said signal processing means including a Schmitt trigger connected to receive as input the output of said rectifying means for actuation so as to provide a signal whenever said voltage output of said alternating current voltage generating means suddenly changes by an amount sufficient to indicate slipping or locking of said wheel.
Claim 2
Dependent Claim
220 words
An arrangement for detecting the slipping or locking of at least one wheel on a surface, comprising, in combination, alternating current voltage generating means mechanically coupled to said wheel for providing an alternating current voltage dependent upon the speed of said wheel; rectifying means connected to the output of said alternating current voltage generating means for rectifying the alternating current voltage of said generating means to provide at its output a pulsating direct current voltage; integrating means having an input connected to the output of said alternating current voltage generating means and to the output of said rectifying means; voltage regulating means having an input connected to the output of said integrating means and an output connected to the input of said rectifying means for maintaining substantially constant the voltage output of said alternating current voltage generating means except for sudden changes in the speed of said wheel associated with slipping or locking of the same; and signal processing means connected to the output of said rectifying means, said signal processing means including a Schmitt trigger connected to receive as input the output of said rectifying means for actuation so as to provide a signal whenever said voltage output of said alternating current voltage generating means suddenly changes by an amount sufficient to indicate slipping or locking of said wheel.
Claim 3
Dependent Claim
50 words
The arrangement as defined in claim 1 wherein said voltage generating means includes a rotatable member with projections of ferromagnetic material and mechanically coupled to said wheel; and magnetic circuit means mounted on the axle of said wheel and in the near vicinity of said projections on said rotatable member.
Claim 4
Dependent Claim
22 words
The arrangement as defined in claim 1 wherein said signal processing means comprises logical switching components at least partially of semi-conductor construction.
Claim 5
Dependent Claim
26 words
The arrangement as defined in claim 1 including a motor vehicle driven by said wheel and braked by a signal provided by said signal processing means.
Claim 6
Dependent Claim
32 words
The arrangement as defined in claim 1 including rail-operated vehicle means driven by said wheel, the accelerating forces for said vehicle being regulated by a signal provided by said signal processing means.
Claim 7
Dependent Claim
37 words
The arrangement as defined in claim 1 including braking means coupled to said wheel for braking the rotation thereof, the braking force applied to said wheel being dependent upon a signal provided by said signal processing means.
Claim 8
Dependent Claim
149 words
The arrangement as defined in claim 1, wherein said alternating current voltage generating means includes a coil having induced therein said alternating currEnt voltage when said wheel rotates, and wherein said voltage regulating means includes a transistor having an input and an output, said input being connected to the output of said integrating means so that the conductivity of said transistor varies in dependence on the output of said integrating means, said output of said transistor being connected to said rectifying means, said coil being connected in series with the emitter-collector path of said transistor so that the direct current flowing through said coil varies in dependence on the conductivity of said transistor, whereby the value of said alternating current voltage is maintained substantially constant for all changes of wheel speed except for sudden changes associated with slipping or locking, which sudden changes cause actuation of said Schmitt trigger.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |