Method for managing start up of a four-stroke engine
US11905902B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2023 |
| Grant date | Feb 20, 2024 |
| Priority date | — |
| Expiry date | Jan 25, 2043 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02P7/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method for managing start up of a four-stroke engine, the method being performed by a controller communicatively connected to the engine. The method includes determining, using a crankshaft sensor, an angular orientation of the crankshaft, the crankshaft being rotated by a starter motor prior to ignition of the engine; determining, using the crankshaft sensor, at least one engine speed variation as the crankshaft rotates through at least one measurement window; and identifying a working cycle phase of the crankshaft including in response to an absolute value of the at least one engine speed variation being above a threshold, determining that the crankshaft is in an ignition revolution of a two revolution working cycle of the engine in the measurement window, subsequent ignition of the engine being based on determination of the angular orientation and the working cycle phase of the crankshaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.