US4585281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-operated brake system for automobiles
Assignee: Volkswagen AG
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Filing: 1984-04-13
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Granted: 1986-04-29
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Expires: 2004-04-13
Abstract
Abstract In the particular embodiments described in the specification, a pressure-actuated brake system for motor vehicles with a brake slip control includes a control means electronically detecting the commencement of a brake slip control operation to provide a signal to increase the brake pressure of at least some of the other wheels which are not yet under brake-slip regulation. The pressure applied to those wheels is increased above the pressure inherently applied by the operator's actuation of the brake pedal at the wheel brake cylinder until such time as brake slip regulation commences at those wheels as well.
Inventors
- 👤 Otmar Schnurer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:40
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/12; B60T13/14; B60T8/00; B60T8/26; B60T8/266; B60T8/32; B60T8/34; B60T8/343; B60T8/344; B60T8/347
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
200 words
A pressure-actuated brake system for a motor vehicle having a plurality of wheels with corresponding wheel brakes comprising electronic brake slip regulating means including sensor means for monitoring the condition of wheel motion at each of the wheels to produce a signal indicating danger of wheel brake locking at the corresponding wheel and antilocking regulating means responsive to signals received from the sensor means to produce control signals, a main brake cylinder, brake pedal means for actuating said main brake cylinder, a hydraulic unit arranged between the main brake cylinder and the wheel brakes and responsive to control signals from the antilocking regulating means to apply pressure to the wheel brakes in such manner that the brake pressure of any locking-endangered wheel is reduced for such time as the danger of locking continues, and wherein the electronic regulating means transmits a control signal to hydraulic control means to produce an increase in the brake pressure, above the pressure resulting from actuation of the main brake cylinder by the brake pedal means, for at least some of those wheels at which a brake slip regulation has not yet commenced in response to initiation of the brake slip regulation at one wheel.
Claim 2
Dependent Claim
200 words
A pressure-actuated brake system for a motor vehicle having a plurality of wheels with corresponding wheel brakes comprising electronic brake slip regulating means including sensor means for monitoring the condition of wheel motion at each of the wheels to produce a signal indicating danger of wheel brake locking at the corresponding wheel and antilocking regulating means responsive to signals received from the sensor means to produce control signals, a main brake cylinder, brake pedal means for actuating said main brake cylinder, a hydraulic unit arranged between the main brake cylinder and the wheel brakes and responsive to control signals from the antilocking regulating means to apply pressure to the wheel brakes in such manner that the brake pressure of any locking-endangered wheel is reduced for such time as the danger of locking continues, and wherein the electronic regulating means transmits a control signal to hydraulic control means to produce an increase in the brake pressure, above the pressure resulting from actuation of the main brake cylinder by the brake pedal means, for at least some of those wheels at which a brake slip regulation has not yet commenced in response to initiation of the brake slip regulation at one wheel.
Claim 3
Dependent Claim
31 words
A pressure-actuated brake system according to claim 1 wherein the hydraulic control means responds to the control signal to increase the brake pressure for only the rear wheels of the vehicle.
Claim 4
Dependent Claim
51 words
A pressure-actuated brake system according to either claim 1 or claim 2 including a brake pressure reservoir which is connected by the hydraulic control means to the brakes of the wheels which are not yet in danger of locking until the brake slip regulation has commenced at those wheels as well.
Claim 5
Dependent Claim
60 words
A pressure-actuated brake system according to either claim 1 or claim 2, including brake force distribution means arranged in the brake pressure line leading to the rear wheels of the vehicle to produce a pressure-controlling action therein, and wherein the brake force distribution means is responsive to a control signal from the regulating means to eliminate the pressure-controlling action thereof.
Claim 6
Dependent Claim
40 words
A pressure-actuated brake system according to claim 4 wherein the brake force distribution means includes normally closed parallel by-pass means and wherein the distribution means is responsive to a control signal from the regulating means to open the by-pass means.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |