Method of determining valve events to optimize engine operating parameters
US6701903B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2002 |
| Grant date | Mar 9, 2004 |
| Priority date | — |
| Expiry date | Sep 28, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method for determining valve timing events to optimize operating parameters of an engine having a variable valve timing system over an entire operating range of the engine. The method includes setting combinations of intake valve opening and closing timing events and exhaust valve opening and closing timing events for a given engine speed. For each combination, a fuel conversion efficiency measure and an emissions measure of the engine at the given engine speed is obtained. Combinations which optimize a weighted cost function of the fuel conversion efficiency measure and the emission measure for a range of engine output torque settings at the given engine speed are then selected. This is repeated for each given engine speed across a range of engine speeds. A feed-forward map based on the selected combinations for the entire operating range of the engine is then assembled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.