Patent US3779331A successfully refreshed from Google Patents.
US3779331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for prevention of spinning of the driven wheels of a motor vehicle
Assignee: Daimler Benz AG
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Filing: 1972-09-27
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Granted: 1973-12-18
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Expires: 1992-09-27
Abstract
Abstract A system for preventing the spinning of the driven wheels of a motor vehicle, in which each wheel is equipped with a generator producing an electrical voltage proportional to the wheel rotational speed and in which the control voltage for the control of the driving or brake force is produced by a comparison of the voltage of a driven and of a non-driven wheel when exceeding a predetermined slippage threshold; the control voltage is obtained by feeding the voltages of the generators of the non-driven wheels to a respective differential amplifier while the voltages of the driven wheels are fed to the corresponding differential amplifier by way of a voltage divider whereby the ratio of division of the voltage divider is adjusted by a control device operated in dependence on the rotational speed of the corresponding non-driven wheel.
Inventors
- 👤 H Stein
- 👤 H Grossner
- 👤 H Krohn
- 👤 M Burckhardt
- 👤 H Florus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:54
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/34; B60T8/48; B60T8/17; B60T8/175
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
168 words
An installation for preventing the spinning of driven wheels of a motor vehicle in which each wheel is provided with a generator means supplying an electrical voltage proportional to the wheel rotational speeds, and in which means are provided for producing a control voltage by comparison of the voltages of a driven and non-driven wheel upon exceeding a predetermined slippage threshold, the means including two differential amplifier means having inputs and outputs, the voltages produced by the respective driven and non-driven wheel being applied to the inputs of a respective differential amplifier means and the outputs thereof being operatively connected to actuating means decreasing the engine torque as also acting on wheel brake means of the driVen wheels, characterized by voltage divider means operable to determine the predetermined slippage threshold, and control means connected to the output of the generator means of the non-driven wheels and operable to vary the ratio of division of the voltage divider means determining the slippage threshold in dependence on the vehicle velocity.
Claim 2
Dependent Claim
168 words
An installation for preventing the spinning of driven wheels of a motor vehicle in which each wheel is provided with a generator means supplying an electrical voltage proportional to the wheel rotational speeds, and in which means are provided for producing a control voltage by comparison of the voltages of a driven and non-driven wheel upon exceeding a predetermined slippage threshold, the means including two differential amplifier means having inputs and outputs, the voltages produced by the respective driven and non-driven wheel being applied to the inputs of a respective differential amplifier means and the outputs thereof being operatively connected to actuating means decreasing the engine torque as also acting on wheel brake means of the driVen wheels, characterized by voltage divider means operable to determine the predetermined slippage threshold, and control means connected to the output of the generator means of the non-driven wheels and operable to vary the ratio of division of the voltage divider means determining the slippage threshold in dependence on the vehicle velocity.
Claim 3
Dependent Claim
26 words
An installation according to claim 1, characterized in that the control means adjust the voltage divider means in steps as a function of the vehicle velocity.
Claim 4
Dependent Claim
25 words
An installation according to claim 2, characterized in that the control means adjust the voltage divider means continuously as a function of the vehicle velocity.
Claim 5
Dependent Claim
40 words
An installation according to claim 1, characterized in that the voltage divider means are operatively connected between the output of the generator means of the driven wheels and a respective one of the inputs of the corresponding differential amplifier means.
Claim 6
Dependent Claim
51 words
An installation according to claim 4, characterized in that differentiating means are connected in the outputs of the generator means of the driven wheels for producing voltages proportional to the corresponding wheel accelerations and including means for triggering switching signals upon exceeding a predetermined value which act upon the actuating means.
Claim 7
Dependent Claim
29 words
An installation according to claim 5, characterized in that the switching signals act on the actuating means with equal rank to the output signals of the differential amplifier means.
Claim 8
Dependent Claim
63 words
An installation according to claim 6, characterized in that the output of a respective differential amplifier means and of a differentiating means is applied to an OR-element, the outputs of the OR-element for each vehicle side being fed to a respective input of an AND-element, and the output of the AND-elements being operatively connected to the actuating means for controlling the engine torque.
Claim 9
Dependent Claim
69 words
An installation according to claim 7, characterized in that two NAND-elements are provided having two inputs each, one input being connected with the output of the respective OR-element of the corresponding side and the other input thereof being connected to the output of the AND-element, and the output of the NAND-element being connected with the actuating means for the wheel brakes of the driven wheel of the corresponding side.
Claim 10
Dependent Claim
26 words
An installation according to claim 8, characterized in that the control means adjust the voltage divider means in steps as a function of the vehicle velocity.
Claim 11
Dependent Claim
25 words
An installation according to claim 8, characterized in that the control means adjust the voltage divider means continuously as a function of the vehicle velocity.
Claim 12
Dependent Claim
51 words
An installation according to claim 1, characterized in that differentiating means are connected in the outputs of the generator means of the driven wheels for producing voltages proportional to the corresponding wheel accelerations and including means for triggering switching signals upon exceeding a predetermined value which act upon the actuating means.
Claim 13
Dependent Claim
29 words
An installation according to claim 11, characterized in that the switching signals act on the actuating means with equal rank to the output signals of the differential amplifier means.
Claim 14
Dependent Claim
63 words
An installation according to claim 11, characterized in that the output of a respective differential amplifier means and of a differentiating means is applied to an OR-element, the outputs of the OR-element for each vehicle side being fed to a respective input of an AND-element, and the output of the AND-elements being operatively connected to the actuating means for controlling the engine torque.
Claim 15
Dependent Claim
69 words
An installation according to claim 13, characterized in that two NAND-elements are provided having two inputs each, one input being connected with the output of the respective OR-element of the corresponding side and the other input thereof being connected to the output of the AND-element, and the output of the NAND-element being connected with the actuating meaNs for the wheel brakes of the driven wheel of the corresponding side.
Claim 16
Dependent Claim
29 words
An installation according to claim 14, characterized in that the switching signals act on the actuating means with equal rank to the output signals of the differential amplifier means.
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |