US3640588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for delaying effective control of vehicle braking by an adaptive braking system until certain wheel velocity and deceleration conditions have been satisfied
Assignee: Bendix Corp
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Filing: 1970-03-03
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Granted: 1972-02-08
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Expires: 1990-03-03
Abstract
Abstract In an adaptive braking system for automobiles, trucks and the like there is provided apparatus for delaying automatic braking control of the vehicle until, after the brakes are applied, a controlled wheel attains a first level of negative acceleration (deceleration) and thereafter the time integral of wheel acceleration attains a level related to controlled wheel speed.
Inventors
- 👤 Ralph W Carp
- 👤 Frederick O Miesterfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:23
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/176; B60T8/1763; B60T8/17633
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
122 words
In a wheeled vehicle having a wheel braking system whereby said vehicle wheels are braked by a braking force and an adaptive braking control channel including means for generating a first signal proportional to rotational speed of one of said wheels, means for generating a second signal proportional to rotational acceleration of said wheel, means for generating a third signal when said second signal attains a first reference level and means responsive to an error signal for attenuating said braking force, an improvement to said adaptive braking control channel comprising: means actuated by said third signal for integrating said second signal with respect to time; and, comparator means for comparing said first signal with said integrated signal to generate said error signal.
Claim 2
Dependent Claim
122 words
In a wheeled vehicle having a wheel braking system whereby said vehicle wheels are braked by a braking force and an adaptive braking control channel including means for generating a first signal proportional to rotational speed of one of said wheels, means for generating a second signal proportional to rotational acceleration of said wheel, means for generating a third signal when said second signal attains a first reference level and means responsive to an error signal for attenuating said braking force, an improvement to said adaptive braking control channel comprising: means actuated by said third signal for integrating said second signal with respect to time; and, comparator means for comparing said first signal with said integrated signal to generate said error signal.
Claim 3
Dependent Claim
38 words
An improvement to an adaptive braking control channel as recited in claim 1 with additionally: means for scaling said first signal, said comparator means comparing said scaled first signal with said integrated signal to generate said error signal.
Claim 4
Dependent Claim
53 words
An improvement to an adaptive braking control channel as recited in claim 1 with additionally: memory means triggered at a predetermined time in the braking cycle of said wheel for memorizing a portion of said first signal, said comparator means comparing said memorized signal with said integrated signal to generate said error signal.
Claim 5
Dependent Claim
46 words
An improvement to an adaptive braking control channel as recited in claim 1 with additionally: memory means triggered by said third signal for memorizing a portion of said first signal, said comparator means comparing said memorized signal with said integrated signal to generate said error signal.
Claim 6
Dependent Claim
67 words
An improvement to an adaptive braking control channel as recited in claim 1 wherein said control channel additionally includes means for generating a fourth signal when said second signal attains a second reference level and wherein said comparator means additionally includes latching means for latching said error signal on, said latching means being responsive to said fourth signal for unlatching itself to thereby extinguish said error signal.
Claim 7
Dependent Claim
75 words
An improvement to an adaptive braking control channel as recited in claim 5 wherein said latching means comprises a feedback circuit connecting the output terminal of said comparator means to a first input terminal of said comparator means, said error signal being generated on said output terminal and said integrated signal being applied at said first input terminal, said latching means additionally comprising unlatching means responsive to said fourth signal for interrupting said feedback circuit.
Claim 8
Dependent Claim
60 words
An improvement to an adaptive braking control channel as recited in claim 1 wherein said integrating means comprises: a charge storage device; normally conductive means for discharging said charge storage device, said normally conductive means being responsive to said third signal for rendering it nonconductive; and, means responsive to said second signal for supplying current to said charge storage device.
Claim 9
Dependent Claim
84 words
An improvement to an adaptive braking control channel as recited in claim 1 wherein said integrating means comprises: a charge storage device; normally conductive means for discharging said charge storage device, said normally conductive means being responsive to said third signal for rendering it nonconductive; and, a constant current source responsive to said second signal to set the current supplied thereby, for supplying current to said charge storage device, the charge stored in said charge storage device being correlated to said integrated second signal.
Claim 10
Dependent Claim
50 words
An improvement to an adaptive braking control channel as recited in claim 8 wherein: said charge storage device comprises a capacitor; and, said normally conductive means comprises a second transistor having a collector-emitter circuit shunting said capacitor and a base electrode connected to said means for generAting a third signal.
Claim 11
Dependent Claim
38 words
An improvement to an adaptive braking control channel as recited in claim 9 wherein said normally conductive means comprises a transistor having a collector-emitter circuit shunting said capacitor, and a base electrode connected to receive said third signal.
Claim 12
Dependent Claim
33 words
An improvement to an adaptive braking control channel as recited in claim 10 with additionally resistance means connected in said collector-emitter circuit for inhibiting discharge of said capacitor when said transistor is conductive.
Claim 13
Dependent Claim
54 words
An improvement to an adaptive braking control channel including a constant current source as recited in claim 8 wherein said constant current source comprises a transistor having a base electrode connected to said constant voltage source, and a collector-emitter circuit connected between said means for generating a second signal and said charge storage device.
Claim 14
Dependent Claim
50 words
An improvement to an adaptive braking control channel as recited in claim 12 wherein: said charge storage device comprises a capacitor; and, said normally conductive means comprises a second transistor having a collector-emitter circuit shunting said capacitor and a base electrode connected to said means for generating a third signal.
Claim 15
Dependent Claim
29 words
An improvement to an adaptive braking control channel as recited in claim 13 with additionally resistance means in said second transistor collector-emitter circuit for inhibiting discharge of said capacitor.
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |