US5116108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive slip control system
Assignee: Robert Bosch GmbH
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Filing: 1988-12-08
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Granted: 1992-05-26
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Expires: 2008-12-08
Abstract
Abstract Wheel slippage and wheel acceleration signals are used to build up and decrease brake pressure stepwise at the vehicle wheels. Combined signals are used to modify the rate of pressure build-up and decrease.
Inventors
- 👤 Alfred Sigl
- 👤 Manfred Meissner
- 👤 Thomas Isella
- 👤 Johannes Schmitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:22
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/34; B60T8/48; B60T8/17; B60T8/175; B60T2270/00; B60T2270/20; B60T2270/211
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
182 words
Drive slip control system for a vehicle having driven wheels and non-driven wheels which rotate at respective wheel speeds, said system comprising means for determining the speeds of the driven wheels, means for determining the speeds of the non-driven wheels, means for determining a vehicle speed, means for determining deviations of the speeds of the driven wheels from the vehicle speed, means for determining accelerations of the driven wheels, means for increasing brake pressure at at least one of said driven wheels at least temporarily in pulses when the deviation of the speed of said at least one of said driven wheels is greater than a first value and the acceleration of said at least one of said driven wheels is greater than a second value, means for decreasing brake pressure at said at least one of said driven wheels at least temporarily in pulses when the deviation of the speed of said at least one of said driven wheels is above said first value and the acceleration of said at least one of said driven wheels is below said second value.
Claim 2
Dependent Claim
182 words
Drive slip control system for a vehicle having driven wheels and non-driven wheels which rotate at respective wheel speeds, said system comprising means for determining the speeds of the driven wheels, means for determining the speeds of the non-driven wheels, means for determining a vehicle speed, means for determining deviations of the speeds of the driven wheels from the vehicle speed, means for determining accelerations of the driven wheels, means for increasing brake pressure at at least one of said driven wheels at least temporarily in pulses when the deviation of the speed of said at least one of said driven wheels is greater than a first value and the acceleration of said at least one of said driven wheels is greater than a second value, means for decreasing brake pressure at said at least one of said driven wheels at least temporarily in pulses when the deviation of the speed of said at least one of said driven wheels is above said first value and the acceleration of said at least one of said driven wheels is below said second value.
Claim 3
Dependent Claim
91 words
Drive slip control system as in claim 1 further comprising means for increasing brake pressure at at least one of said driven wheels at least temporarily in pulses when the deviation of the speed of said at least one of said driven wheels is greater than said first value and the acceleration of said at least one of said driven wheels is greater than a third value which is greater than said second value, said means increasing said brake pressure faster than when said acceleration is less than said third value.
Claim 4
Dependent Claim
72 words
Drive slip control system as in claim 1 further comprising means for decreasing brake pressure at said at least one of said driven wheels at least temporarily in pulses when the deviation of the speed of the said at least one of said driven wheels is equal to said first value, said means decreasing said brake pressure more slowly than when said deviation of said speed is less than said first value.
Claim 5
Dependent Claim
14 words
Drive slip control system as in claim 1 wherein said first value is zero.
Claim 6
Dependent Claim
14 words
Drive slip control system as in claim 1 wherein said second value is zero.
Claim 7
Dependent Claim
210 words
Method for controlling slip of the driven wheels in a vehicle having driven wheels and non-driven wheels which rotate at respective wheel speeds, said method comprising determining the speeds of the driven wheels, determining the speeds of the non-driven wheels, determining a vehicle speed, determining deviations of the speeds of the driven wheels from the vehicle speed, determining accelerations of the driven wheels, increasing brake pressure at at least one of said driven wheels at least temporarily in pulses when the deviation of the speed of said at least one of said driven wheels is greater than a first value and the acceleration of said at least one of said driven wheels is greater than a second value, decreasing brake pressure at said of at least one said driven wheels at least temporarily in pulses when the deviation of the speed of said at least one of said driven wheels is below said first value, and decreasing brake pressure at said at least one of said driven wheels at least temporarily in pulses when the deviation of the speed of said at least one of said driven wheels is above said first value and the acceleration of said at least one of said driven wheels is below said second value.
Claim 8
Dependent Claim
210 words
Method for controlling slip of the driven wheels in a vehicle having driven wheels and non-driven wheels which rotate at respective wheel speeds, said method comprising determining the speeds of the driven wheels, determining the speeds of the non-driven wheels, determining a vehicle speed, determining deviations of the speeds of the driven wheels from the vehicle speed, determining accelerations of the driven wheels, increasing brake pressure at at least one of said driven wheels at least temporarily in pulses when the deviation of the speed of said at least one of said driven wheels is greater than a first value and the acceleration of said at least one of said driven wheels is greater than a second value, decreasing brake pressure at said of at least one said driven wheels at least temporarily in pulses when the deviation of the speed of said at least one of said driven wheels is below said first value, and decreasing brake pressure at said at least one of said driven wheels at least temporarily in pulses when the deviation of the speed of said at least one of said driven wheels is above said first value and the acceleration of said at least one of said driven wheels is below said second value.
Claim 9
Dependent Claim
38 words
Method as in claim 6 wherein said brake pressure is increased faster when said acceleration is greater than a third value which is greater than said second value, than when said acceleration is less than said third value.
Claim 10
Dependent Claim
27 words
Method as in claim 7 wherein said pulses have pauses therebetween, thus defining a pulse-pause relation, said brake pressure being increased faster by changing the pulse-pause relation.
Claim 11
Dependent Claim
33 words
Method as in claim 6 wherein said brake pressure is decreased more slowly when said deviation is equal to said first value then when said brake pressure is less than said first value.
Claim 12
Dependent Claim
25 words
Method as in claim 9 wherein said pulses have pauses therebetween, said brake pressure being decreased more slowly by increasing the pause time between pulses.
Claim 13
Dependent Claim
11 words
Method as in claim 6 wherein said first value is zero.
Claim 14
Dependent Claim
11 words
Method as in claim 6 wherein said second value is zero.
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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) | 1995-05-26 | 1995-11-25 | 1996-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-26 | 1999-11-25 | 2000-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-26 | 2003-11-25 | 2004-05-26 | $7700.00 | Window Closed / Lapsed |