US3762774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake force control system for vehicles especially motor vehicles
Assignee: Daimler Benz AG
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Filing: 1971-07-13
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Granted: 1973-10-02
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Expires: 1991-07-13
Abstract
Abstract A brake force control system for vehicles, especially for motor vehicles, in which a sensing device is coordinated to each wheel for determining its rotating condition, whose signals influence the brakes when exceeding or falling below certain threshold values and when compared with a reference magnitude which is derived from the wheel rotating the fastest; a second reference magnitude of similar type replaces the first reference magnitude when the latter fails or drops below a predetermined value whereby the second reference magnitude proceeds according to a first differential quotient corresponding to a deceleration of the wheel equal to at least 1 g.
Inventors
- 👤 M Burckhardt
- 👤 H Krohn
- 👤 H Grossner
- 👤 H Florus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:45
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/176; B60T8/1761; B60T8/17613; B60T8/32; B60T8/58
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
177 words
A brake force control system for vehicles, especially for motor vehicles in which a sensing means is coordinated to each wheel for determining its rotating condition and in which the signals of the sensing means upon exceeding or falling below a predetermined threshold value and upon comparison with a reference magnitude produced by the wheel rotating the fastest, influence the brakes of the vehicle, characterized by means producing a second reference magnitude of similar type which replaces the first reference magnitude when the first reference magnitude either fails completely or decreases below a predetermined value, and in that the second reference magnitude proceeds according to a first differential quotient corresponding substantially to a deceleration of at least about 1 g, said means including a condenser means adapted to be rapidly charged by the maximum voltage serving as the first reference magnitude, said condenser means being discharged in a controlled manner with a substantially constant current, a substantially currentless signal pick-up means at the condenser means, and an impedance converter for the signal pick-up means at the condenser.
Claim 2
Dependent Claim
177 words
A brake force control system for vehicles, especially for motor vehicles in which a sensing means is coordinated to each wheel for determining its rotating condition and in which the signals of the sensing means upon exceeding or falling below a predetermined threshold value and upon comparison with a reference magnitude produced by the wheel rotating the fastest, influence the brakes of the vehicle, characterized by means producing a second reference magnitude of similar type which replaces the first reference magnitude when the first reference magnitude either fails completely or decreases below a predetermined value, and in that the second reference magnitude proceeds according to a first differential quotient corresponding substantially to a deceleration of at least about 1 g, said means including a condenser means adapted to be rapidly charged by the maximum voltage serving as the first reference magnitude, said condenser means being discharged in a controlled manner with a substantially constant current, a substantially currentless signal pick-up means at the condenser means, and an impedance converter for the signal pick-up means at the condenser.
Claim 3
Dependent Claim
24 words
A brake force control system according to claim 1, characterized in that said means produces said second reference magnitude from said first reference magnitude.
Claim 4
Dependent Claim
29 words
A brake force control system according to claim 1, characterized in that the condenser means is adapted to be discharged by way of a transistor with constant base voltage.
Claim 5
Dependent Claim
24 words
A brake force control system according to claim 3, characterized in that the constant base voltage at the transistor is produced by diode means.
Claim 6
Dependent Claim
43 words
A brake force control system according to claim 4, characterized in that a resistance means is arranged in the emitter circuit of the transistor as negative feedback which is substantially matched to the diode means and to the magnitude of the discharge current.
Claim 7
Dependent Claim
148 words
A brake force control system for vehicles, especially for motor vehicles in which a sensing means is coordinated to each wheel for determining its rotating condition and in which the signals of the sensing means upon exceeding or falling below a predetermined threshold value and upon comparison with a reference magnitude produced by the wheel rotating the fastest, influence the brakes of the vehicle, characterized by means producing a second reference magnitude of similar type which replaces the first reference magnitude when the first reference magnitude either fails completely or decreases below a predetermined value, said means including a condenser means adapted to be rapidly charged by the maximum voltage serving as the first reference magnitude, said condenser means being discharged in a controlled manner with a substantially constant current, and substantially currentless signal pick-up means including an impedance converter for picking-up the signal at said condenser means.
Claim 8
Dependent Claim
148 words
A brake force control system for vehicles, especially for motor vehicles in which a sensing means is coordinated to each wheel for determining its rotating condition and in which the signals of the sensing means upon exceeding or falling below a predetermined threshold value and upon comparison with a reference magnitude produced by the wheel rotating the fastest, influence the brakes of the vehicle, characterized by means producing a second reference magnitude of similar type which replaces the first reference magnitude when the first reference magnitude either fails completely or decreases below a predetermined value, said means including a condenser means adapted to be rapidly charged by the maximum voltage serving as the first reference magnitude, said condenser means being discharged in a controlled manner with a substantially constant current, and substantially currentless signal pick-up means including an impedance converter for picking-up the signal at said condenser means.
Claim 9
Dependent Claim
24 words
A brake force control system according to claim 6, characterized in that said impedance transformer is an operational amplifier connected as a noninverting amplifier.
Claim 10
Dependent Claim
29 words
A brake force control system according to claim 6, characterized in that the condenser means is adapted to be discharged by way of a transistor with constant base voltage.
Claim 11
Dependent Claim
24 words
A brake force control system according to claim 6, characterized in that the constant base voltage at the transistor is produced by diode means.
Claim 12
Dependent Claim
43 words
A brake force control system according to claim 6, characterized in that a resistance means is arranged in the emitter circuit of the transistor as negative feedback which is substantially matched to the diode means and to the magnitude of the discharge current.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |