US5330027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for controlling wheel spin
Assignee: ZF International UK Ltd
•
Filing: 1991-12-27
•
Granted: 1994-07-19
•
Expires: 2011-12-27
Abstract
Abstract A traction control system is provided for controlling wheel spin of a vehicle. The amount of wheel spin is determined for each driven wheel and compared with a threshold. When the threshold is exceeded, drive to the driven wheel is immediately reduced by a predetermined amount. Drive is restored as soon as the wheel spin is brought under control.
Inventors
- 👤 Douglas W. Glover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:38
CPC Classifications
B; B60; B60K; B60K28/00; B60K28/10; B60K28/16
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
134 words
An apparatus for reducing wheel spin of at least one driven wheel of a vehicle, said apparatus comprising detecting means for detecting wheel spin and spin control means responsive to said detecting means for controlling spin by reducing drive to the at least one driven wheel upon detection by said detecting means of wheel spin exceeding a predetermined threshold, said spin control means being arranged to reduce the drive in accordance with a predetermined function of wheel spin, said predetermined function having a first term which is proportional to wheel spin and a second term which is an integral function relative to the time of wheel spin, said integral function having an initial value when said detecting means detects wheel spin exceeding a predetermined threshold, said initial value corresponding to a predetermined drive reduction.
Claim 2
Independent Claim
134 words
An apparatus for reducing wheel spin of at least one driven wheel of a vehicle, said apparatus comprising detecting means for detecting wheel spin and spin control means responsive to said detecting means for controlling spin by reducing drive to the at least one driven wheel upon detection by said detecting means of wheel spin exceeding a predetermined threshold, said spin control means being arranged to reduce the drive in accordance with a predetermined function of wheel spin, said predetermined function having a first term which is proportional to wheel spin and a second term which is an integral function relative to the time of wheel spin, said integral function having an initial value when said detecting means detects wheel spin exceeding a predetermined threshold, said initial value corresponding to a predetermined drive reduction.
Claim 3
Dependent Claim
26 words
An apparatus as claimed in claim 1, in which said spin control means is disabled when wheel spin falls to less than a predetermined threshold value.
Claim 4
Dependent Claim
36 words
An apparatus as claimed in claim 1, in which said spin control means is arranged to reduce the drive to a predetermined proportion of a drive before the detection of wheel spin exceeding the predetermined threshold.
Claim 5
Dependent Claim
14 words
An apparatus as claimed in claim 3, in which the predetermined proportion is 50%.
Claim 6
Dependent Claim
41 words
An apparatus as claimed in claim 1, for a vehicle driven by an internal combustion engine, in which said spin control means comprises means for cutting off supply of fuel for a predetermined pattern of cylinder fire periods of the engine.
Claim 7
Independent Claim
115 words
A method of controlling wheel spin of at least one driven wheel of a vehicle, said method comprising the steps of detecting wheel spin and reducing drive to the at least one driven wheel upon detecting wheel spin greater than a predetermined threshold, said drive reducing step comprising reducing the drive in accordance with a predetermined function of wheel spin, said predetermined function having a first term which is proportional to a wheel spin and a second term which is an integral function relative to the time of wheel spin, said integral function having an initial value when wheel spin exceeding said predetermined threshold is detected, said initial value corresponding to a predetermined drive reduction.
Claim 8
Independent Claim
115 words
A method of controlling wheel spin of at least one driven wheel of a vehicle, said method comprising the steps of detecting wheel spin and reducing drive to the at least one driven wheel upon detecting wheel spin greater than a predetermined threshold, said drive reducing step comprising reducing the drive in accordance with a predetermined function of wheel spin, said predetermined function having a first term which is proportional to a wheel spin and a second term which is an integral function relative to the time of wheel spin, said integral function having an initial value when wheel spin exceeding said predetermined threshold is detected, said initial value corresponding to a predetermined drive reduction.
Claim 9
Dependent Claim
33 words
A method as claimed in claim 6, comprising the further step of restoring the drive to the at least one driven wheel when wheel spin falls to less than a predetermined threshold value.
Claim 10
Dependent Claim
34 words
A method as claimed in claim 6, in which said drive reducing step comprises reducing the drive to a predetermined proportion of a drive before the detection of wheel spin exceeding the predetermined threshold.
Claim 11
Dependent Claim
14 words
A method as claimed in claim 8, in which the predetermined proportion is 50%.
Claim 12
Dependent Claim
39 words
A method as claimed in claim 6 for a vehicle driven by an internal combustion engine, in which said drive reducing step comprises cutting off supply of fuel for a predetermined pattern of cylinder fire periods of the engine.
References Cited (Backward Citations)
US4432430A
Cited
JPS5918251A
Cited
JPS60151160A
Cited
GB2158270A
Cited
US4843552A
Cited
US4860849A
Cited
US5168950A
Cited
US5113963A
Cited
US4985837A
Cited
US5038883A
Cited
US5018595A
Cited
US4951773A
Cited
US5025882A
Cited
US5154151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-07-18 | 1998-01-17 | 1998-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-18 | 2002-01-17 | 2002-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-18 | 2006-01-17 | 2006-07-19 | $7700.00 | Window Closed / Lapsed |