US3832009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antiskid control system
Assignee: Robert Bosch GmbH
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Filing: 1972-06-02
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Granted: 1974-08-27
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Expires: 1992-06-02
Abstract
Abstract An antiskid control system for vehicles includes members for controlling the brake pressure. At least two sensors are operatively associated with different wheels of the vehicle to be braked. These sensors produce signals at their respective outputs which are respectively related to the rotational behavior of respective wheels. A circuit arrangement is coupled between the members for controlling brake pressure and the two sensors and is responsive to output signals therefrom for regulating brake pressure. The circuit arrangement includes a switching circuit and a signal evaluation channel. The switching circuit is operatively arranged to connect each of the sensors in a predetermined sequence to the signal evaluation channel. The output of which is coupled to the members for controlling brake pressure.
Inventors
- 👤 H Leiber
- 👤 W Korasiak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:29
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/176; B60T8/1761; B60T8/17613
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
158 words
In an antiskid control system for vehicles, the control system including means for varying brake pressure, at least two sensors operatively associated with different wheels of the vehicle for producing signals at their respective outputs related to the rotational behavior of respective wheels, and signal evaluation channel means coupled between said means for varying brake pressure and said two sensors and responsive to output signals therefrom for regulating brake pressure, the improvement wherein said control system includes only one signal evaluation channel means, and further comprises switching means connected between said evaluation channel means and each of said sensors for connecting each of said sensors to said evaluation channel means in a predetermined sequence, and means for coupling the successively generated output signals from said one evaluation channel means derived from the signals from sequentially connected sensors to said means for varying the brake pressure to regulate the brake pressure at the brakes associated with the respective sensor.
Claim 2
Dependent Claim
158 words
In an antiskid control system for vehicles, the control system including means for varying brake pressure, at least two sensors operatively associated with different wheels of the vehicle for producing signals at their respective outputs related to the rotational behavior of respective wheels, and signal evaluation channel means coupled between said means for varying brake pressure and said two sensors and responsive to output signals therefrom for regulating brake pressure, the improvement wherein said control system includes only one signal evaluation channel means, and further comprises switching means connected between said evaluation channel means and each of said sensors for connecting each of said sensors to said evaluation channel means in a predetermined sequence, and means for coupling the successively generated output signals from said one evaluation channel means derived from the signals from sequentially connected sensors to said means for varying the brake pressure to regulate the brake pressure at the brakes associated with the respective sensor.
Claim 3
Dependent Claim
62 words
An arrangement as defined in claim 1 wherein said sensors are operatively arranged to produce as their output signals respective pulse trains having pulse repetition rates related to the speed of the respective wheels and said signal evaluation channel means includes pulse repetition rate to voltage converter means coupled between said switching means and the remainder of said signal evaluation channel means.
Claim 4
Dependent Claim
24 words
An arrangement as defined in claim 1 wherein said signal evaluation channel means is operatively arranged for producing control signals to control brake pressure.
Claim 5
Dependent Claim
53 words
An arrangement as defined In claim 1 wherein said signal evaluation channel means is operatively arranged for producing control signals to control the brake pressure and said means for varying brake pressure is operatively arranged to control commonly the brake pressure at the wheel brakes with which two of said sensors are associated.
Claim 6
Dependent Claim
54 words
An arrangement as defined in claim 1 wherein said signal evaluation channel means is operatively arranged for producing control signals to control brake pressure and said means for varying brake pressure is operatively arranged to control separately the brake pressure at the wheel brakes of wheels associated with the individual ones of said sensors.
Claim 7
Dependent Claim
71 words
An arrangement as defined in claim 1 further comprising means responsive to an output signal indicating a tendency of a wheel to lock from said signal evaluation circuit means for interrupting the action of said switching means whereby the particular sensor which sensed the tendency to lock remains connected to said signal evaluation circuit means for a period and the scanning in said predetermined sequence of said sensors is temporarily interrupted.
Claim 8
Dependent Claim
54 words
An arrangement as defined in claim 6 wherein said means for interrupting the action of said switching means is operatively arranged for assuring the connection of that sensor which senses a tendency to lock to said evaluation circuit means until the wheel with which it is associated has again reached its stable speed range.
Claim 9
Dependent Claim
66 words
An arrangement as defined in claim 6 wherein said means for interrupting said switching means is operatively arranged for assuring the connection of that sensor which senses a tendency to lock to said evaluation channel means until the brake pressure remains substantially constant as a result of signals from that particular sensor, this constant pressure phase being maintained during connection of the other sensor or sensors.
Claim 10
Dependent Claim
65 words
An arrangement as defined in claim 6 wherein said means for interrupting said switching means is operatively arranged for assuring the connection of that sensor which senses a tendency to lock to said evaluation channel means until the brake pressure is raised as a result of signal from that particular sensor, this raising pressure phase being maintained during connection of the other sensor or sensors.
Claim 11
Dependent Claim
36 words
An arrangement as defined in claim 6 wherein said means for interrupting the action of said switching means is responsive to a signal from said signal evaluation circuit means which actuates a reduction in brake pressure.
Claim 12
Dependent Claim
46 words
An arrangement as defined in claim 1 wherein said switching means includes gates each coupled between the output of a respective one of said sensors and the input of said evaluation channel means, and logic means including a pulse generator means for alternately enabling said gates.
Claim 13
Dependent Claim
55 words
An arrangement as defined in claim 11 wherein said means for enabling said gates further includes stepping switch means, which are responsive to the output pulses from said pulse generator, for alternately enabling said gates for connecting individual ones of said sensors to said evaluation channel means in each one of its successively occurring positions.
Claim 14
Dependent Claim
49 words
An arrangement as defined in claim 7 further comprising means responsive to an output signal from said evaluation channel means indicating further interruption of the switching action is not required for controlling said switching means to assure the immediate further connection of the next following sensor of said sensors.
Claim 15
Dependent Claim
90 words
An arrangement as defined in claim 1 wherein said means for varying brake pressure includes control means for the brake of a non-driven wheel operatively arranged to permit pressure-increase, pressure-substantially-kept-constant and pressure-falling states and control means for the brakes of other wheels operatively arranged to permit only pressure-increase and pressure-falling states, said switching means being operatively arranged to connect that sensor associated with said non-driven wheel to said evaluAtion channel means more frequently than the other sensor, and further comprising means for developing slip signals in said evaluation channel means.
Claim 16
Dependent Claim
46 words
An arrangement as defined in claim 14 wherein said switching means is operatively arranged to connect that sensor associated with the non-driven wheel to said evaluation channel means after each connection of any of the other sensors before the next of the other sensors is connected.
Claim 17
Dependent Claim
27 words
An arrangement as defined in claim 1 wherein said evaluation channel means includes means for developing slip signals and for utilizing same to regulate the brake pressure.
Claim 18
Dependent Claim
30 words
An arrangement as defined in claim 1 wherein said evaluation channel means includes means for developing positive and negative acceleration signals and for utilizing same to regulate the brake pressure.
Claim 19
Dependent Claim
30 words
An arrangement as defined in claim 16 wherein said evaluation channel means includes means for developing positive and negative acceleration signals and for utilizing same to regulate the brake pressure.
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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |