Patent US3797892A successfully refreshed from Google Patents.
US3797892A
Expired / Lapsed
US
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Antilock control system
Assignee: Robert Bosch GmbH
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Filing: 1972-04-18
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Granted: 1974-03-19
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Expires: 1992-04-18
Abstract
Abstract An antilock control system for controlling the braking pressure acting on the wheels of one vehicle axle comprises a sensing device for sensing the behavior of each wheel, two control arrangements for controlling the braking pressure, the first of which is actuated when both wheels exhibit a tendency to lock and the second of which is actuated when one of the wheels exhibits a tendency to lock and a switch device for switching from the first control arrangement to the second control arrangement when the vehicle is subjected to or is about to be subjected to transverse accelerations.
Inventors
- 👤 H Leiber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:53
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/1755
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
250 words
An antilock control system for controlling the braking pressure acting on the wheels of one vehicle axle, comprising in combination: a. braking pressure reducing means coupled to all the wheels of said vehicle axle for the common, simultaneous control thereof; b. a separate sensing means connected to each wheel of said axle for separately sensing the behavior of each said wheel, each sensing means having an output for emitting a control signal when the associated wheel manifests a tendency to lock; and c. control means including inputs connected to said outputs of said separate sensing means and an output coupled to said braking pressure reducing means, said control means having a first state for reducing the braking pressure on all the wheels of said vehicle axle by means of said braking pressure reducing means only when the output of each sensing means emits simultaneously said control signal, said control means having a second state for reducing the braking pressure on all the wheels of said vehicle axle by means of said braking pressure reducing means when the output of at least one of said sensing means emits said control signal, said control means further including switch means responsive at least indirectly to a change from a substantially straight line travel of the vehicle to a curved line travel thereof for switching said control means from said first state into said second state at the latest when said vehicle is beginning to be subjected to transverse accelerations exceeding a predetermined value.
Claim 2
Dependent Claim
250 words
An antilock control system for controlling the braking pressure acting on the wheels of one vehicle axle, comprising in combination: a. braking pressure reducing means coupled to all the wheels of said vehicle axle for the common, simultaneous control thereof; b. a separate sensing means connected to each wheel of said axle for separately sensing the behavior of each said wheel, each sensing means having an output for emitting a control signal when the associated wheel manifests a tendency to lock; and c. control means including inputs connected to said outputs of said separate sensing means and an output coupled to said braking pressure reducing means, said control means having a first state for reducing the braking pressure on all the wheels of said vehicle axle by means of said braking pressure reducing means only when the output of each sensing means emits simultaneously said control signal, said control means having a second state for reducing the braking pressure on all the wheels of said vehicle axle by means of said braking pressure reducing means when the output of at least one of said sensing means emits said control signal, said control means further including switch means responsive at least indirectly to a change from a substantially straight line travel of the vehicle to a curved line travel thereof for switching said control means from said first state into said second state at the latest when said vehicle is beginning to be subjected to transverse accelerations exceeding a predetermined value.
Claim 3
Dependent Claim
23 words
An antilock control system as defined in claim 1, wherein said switch means comprises an acceleration measuring device for sensing said transverse accelerations.
Claim 4
Dependent Claim
42 words
An antilock control system as defined in claim 1, wherein said switch means comprises means associated with the vehicle steering wheel for switching said actuating means from said first state to said second state at predetermined angular positions of said steering wheel.
Claim 5
Dependent Claim
83 words
An antilock control system as defined in claim 1, further comprising a reference value generator for generating a reference value from the highest of the speeds of said wheels, each said sensing means including comparator means for comparing a speed value derived from the speed of the associated wheel by said sensing means, with said reference value to provide a slip value and each said sensing means further including means for emitting said control signal when said slip value reaches a predetermined magnitude.
Claim 6
Dependent Claim
49 words
An antilock control system as defined in claim 4, wherein storage means are provided for storing the rotational speed values of each said wheel when a predetermined deceleration of said wheels takes place and means are provided to select the largest of said stored values as said reference value.
Claim 7
Dependent Claim
45 words
An antilock control system as defined in claim 5, wherein means are provided for causing a new speed value of a wheel to be stored in said storage means when the speed value of this wheel deviates to a predetermined extent from said reference value.
Claim 8
Dependent Claim
45 words
An antilock control system as defined in claim 1, said switch means further including means for switching said control means from said first state into said second state after the output of each sensing means has emitted said control signal simultaneously for a predetermined period.
Claim 9
Dependent Claim
153 words
An antilock control system as defined in claim 1, wherein said signals are electric signals generated by electric signal generating means, said control means includes a first AND gate, each input of which is connected to an output of said separate sensing means; a first OR gate, each input of which is connected to an output of said separate sensing means; an output forming part of said switch means to emit an electric signal when responding to said curved line travel; a second AND gate having one input connected to the output of said first OR gate and having another input connected to the output of said switch means; and a second OR gate having one input connected to the output of said first AND gate and having another input connected to the output of said second AND gate, said second OR gate has an output connected to said braking pressure reducing means.
Claim 10
Dependent Claim
61 words
An antilock control system as defined in claim 8, further including a delay means coupling the output of said first AND gate with said other input of said second AND gate for switching said control means from said first state into said second state after the output of each sensing means has emitted said control signal simultaneously for a predetermined period.
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |