Method and system for an adaptive fuel control in two-stroke engines
US5653209A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 1996 |
| Grant date | Aug 5, 1997 |
| Priority date | — |
| Expiry date | Apr 11, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2400/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method and system for adaptive correction of the amount of fuel supplied in two-stroke combustion engines which during a continuous operation period regulates the air-fuel mixture regulated by increments in the lean direction (.DELTA.F.sup.-) or in the rich direction (.DELTA.F.sup.+), whereby fuel amounts (F) are established which cause knocking (KNOCK) and four-stroking or misfiring (4-ST), respectively. These limit values are stored as a lean limit value M.sub.FK and a rich limit value M.sub.F4ST, respectively. For further operation of the combustion engine, a corrected fuel amount F.sub.koor, is used, which is corrected in relation to the fuel amount F.sub.tab given from an empirically determined value stored in a map, and dependent on the established lean limit value M.sub.FK and the rich limit value M.sub.F4ST, respectively. The fuel amount (F) supplied will suitably be given according to the function: F=F.sub.korr =M.sub.FK +K.multidot.(M.sub.F4ST -M.sub.FK), where K is a margin factor which defines if further operation of the engine will be controlled having an equidistant margin towards a knocking condition or a four-stroking or misfire condition, i.e., if K is set to a v…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.