Slip control deceleration signal filtering system
US5335178A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 1991 |
| Grant date | Aug 2, 1994 |
| Priority date | — |
| Expiry date | Oct 21, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60L3/10
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method for filtering out disturbances in the form of short term wheel acceleration signals when the wheel exhibits an overall deceleration, so that a more accurate deceleration signal can be used for control of drive slippage. Wheel speed v is measured at intervals T.sub.A and speed changes for each interval are determined. When a change is negative or zero following a positive change in a previous interval, the wheel speed is stored as a maximum speed v.sub.max while v continues to be measured and a counter determines the period of time .DELTA.t between the occurrence of v.sub.max and the instantaneous value v. Beginning at a predetermined filtering time .DELTA.T after storing v.sub.max, a quotient .DELTA.v/.DELTA.t representing the filtered slope of the value v is determined and used as a control variable to regulate wheel slippage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.