Method of implementing control logic of compression ignition engine
US10837377B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 2019 |
| Grant date | Nov 17, 2020 |
| Priority date | — |
| Expiry date | Jun 14, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method of implementing control logic of a compression ignition engine is provided. The engine includes an injector, a variable valve operating mechanism, an ignition plug, at least one sensor, and a processor. The processor outputs the signal to the ignition plug in a specific operating state so that unburnt mixture gas combusts by self ignition after the ignition plug ignites the mixture gas inside a combustion chamber. The method includes determining a geometric compression ratio ε of the engine, and determining control logic defining a valve opening angle CA of an intake valve. The valve opening angle CA (deg) is determined so that the following expression is satisfied, if the geometric compression ratio ε is ε<14, −40ε+800+D≤CA≤60ε−550+D. Here, D is a correction term according to the engine speed NE (rpm), D=3.3×10−10NE3−1.0×10−6NE2+7.0×10−4NE.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.