Methods and apparatus for controlling cut-off of a motor vehicle starter
US5983850A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 11, 1997 |
| Grant date | Nov 16, 1999 |
| Priority date | — |
| Expiry date | Dec 11, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02N2200/044
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A starter for a motor vehicle internal combustion engine includes an electronic means for controlling cut off of the starter, whereby fluctuations are detected in the signal which correspond to the voltage or current of the starter, the power supply to the starter being interrupted when these fluctuations disappear. The automatic cut-off method includes determining, in the signal, successive periods during which the voltage is constantly increasing, the starter being cut off when one of these periods becomes greater than a given threshold. This threshold is given distinct values, firstly during an inspection time period which begins on closing of the starter contactor, and secondly, after the inspection time period. The duration of the inspection time period is chosen so as to be long enough to include the case in which the first and second fluctuations at the start of the compression strokes of the engines are substantially coincident with each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.