Method of determining valve control times for a maximum cylinder charge on a piston-type internal combustion engine
US5746164A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1996 |
| Grant date | May 5, 1998 |
| Priority date | — |
| Expiry date | Sep 5, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method is provided for determining valve control times for a maximum charge for cylinders in a piston-type internal combustion engine provided with fuel injection, lambda sensor control and electromagnetically actuatable cylinder valves. The method includes setting the "intake closes" control moment to a preliminary value on all gas intake valves of the engine; changing continuously the "intake closes" control moment on the gas intake valves at least one cylinder while maintaining a constant engine rpm and determining, with the lambda sensor control at .lambda.=1, one of (1) a longest fuel injection duration and (2) a leanest operation at a constant injection duration; and storing the determined "intake closes" control moments at respective rpm's in a performance characteristic of an engine control for achieving a maximum charge in the cylinders at the respective rpm's.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.