L-Jetronic fuel injected engine control device and method smoothing air flow meter overshoot
US4481928A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 1982 |
| Grant date | Nov 13, 1984 |
| Priority date | — |
| Expiry date | May 5, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/182
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method for controlling, according to the L-jetronic fuel injection principle, an internal combustion engine with a fuel injection valve fitted to its intake manifold, and an intake air flow meter. Repeatedly a first quantity representing the desired amount of fuel to be provided to the combustion chambers of the engine during the time period between the next two fuel injection pulse time points is determined, based upon sensed values of certain operational parameters including intake air flow, and a second quantity is determined as the time smoothed value of the first quantity. Optionally further the second quantity may be modified according to engine operational parameters. Simultaneously, at proper injection time points in the engine's operational cycle, the fuel injection valve is opened for a time corresponding to a third quantity which is calculated from the second quantity. A device is also explained, incorporating an electronic computer, which practices this method. Thereby, overshooting of the air flow meter is corrected for.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.