Method and systems for determining internal combustion engine cylinder condition
US7246006B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 2004 |
| Grant date | Jul 17, 2007 |
| Priority date | — |
| Expiry date | Jun 14, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M15/044
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of evaluating a contribution of a cylinder to an engine includes measuring a first revolutions per minute of the engine during an enabled state; determining a dwell period of the cylinder; applying a direct current voltage signal into a negative terminal of an ignition coil of the engine during the dwell period to disable the cylinder and create a disabled state; and measuring a second revolutions per minute of the engine during the disabled state. A system for evaluating a contribution of a cylinder to an engine includes a first measure module, a determine module, an apply module, and a second measure module. The first measure module measures a first revolutions per minute of the engine during an enabled state. The determine module determines a dwell period of the cylinder. The apply module applies a direct current voltage signal into a negative terminal of an ignition coil of the engine during the dwell period to disable the cylinder and create a disabled state. The second measure module measures a second revolutions per minute of the engine during the disabled state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.