US4821189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the damping force adjustment of motor vehicles as a function of output signals of a transmitter arranged at the vehicle body
Assignee: Bayerische Motoren Werke AG
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Filing: 1987-09-25
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Granted: 1989-04-11
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Expires: 2007-09-25
Abstract
Abstract In a method for the damping force adjustment of motor vehicles in dependence of output signals of a transmitter arranged at the vehicle body which are processed and are compared with a predetermined threshold value and which produce a signal for changing the damping force when exceeding/dropping below this threshold value, the changes of these output signals are added at equal intervals with respect to time and determined over a measuring period which is considerably larger than the natural period (reciprocal resonance frequency) of the vehicle wheels and are compared with a threshold value which is dependent on the load of the vehicle. A drift-free indication about the damping force adjustment to be selected becomes possible therewith without frequency analysis.
Inventors
- 👤 Dieter Hennecke
- 👤 Eugen Herb
- 👤 Udo Ochner
- 👤 Bernd Jordan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:35
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/015; B60G17/018
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
98 words
A method for the damping force adjustment of motor vehicles in dependence on output signals of a transmitter arranged at a vehicle body, which are processed and initiate a signal for changing the damping force when exceeding/dropping below a predetermined threshold value, comprising the steps of adding the changes of the output signals of the transmitter measured in equal intervals with respect to time and determining the same over a measuring period which is considerably larger than the natural period of the vehicle wheels, and comparing the same with a threshold value that is dependent on the load.
Claim 2
Independent Claim
98 words
A method for the damping force adjustment of motor vehicles in dependence on output signals of a transmitter arranged at a vehicle body, which are processed and initiate a signal for changing the damping force when exceeding/dropping below a predetermined threshold value, comprising the steps of adding the changes of the output signals of the transmitter measured in equal intervals with respect to time and determining the same over a measuring period which is considerably larger than the natural period of the vehicle wheels, and comparing the same with a threshold value that is dependent on the load.
Claim 3
Dependent Claim
44 words
A method according to claim 1, in which a further transmitter is provided whose output signal is an indication for the load of the vehicle, further comprising the step of changing the threshold value by means of the output signal of the further transmitter.
Claim 4
Dependent Claim
31 words
A method according to claim 2, in which with a damping force adjustment in three steps, the two threshold values determinative for the transition of two steps are dependent on load.
Claim 5
Dependent Claim
26 words
A method according to claim 3, wherein the threshold value or values are dependent on at least one of outside temperature, vehicle velocity and steering angle.
Claim 6
Dependent Claim
24 words
A method according to claim 4, wherein the threshold values, respectively, magnitudes can be used for the control of a continuous damping force adjustment.
Claim 7
Dependent Claim
31 words
A method according to claim 1, in which with a damping force adjustment in three steps, the two threshold values determinative for the transition of two steps are dependent on load.
Claim 8
Dependent Claim
26 words
A method according to claim 1, wherein the threshold value or values are dependent on at least one of outside temperature, vehicle velocity and steering angle.
Claim 9
Dependent Claim
24 words
A method according to claim 1, wherein the threshold values, respectively, magnitudes can be used for the control of a continuous damping force adjustment.
Claim 10
Dependent Claim
22 words
A method according to claim 1, wherein the threshold value or values are dependent on outside temperature, vehicle velocity and steering angle.
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) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |