Patent · US Active

Method of implementing control logic of compression ignition engine

US10837377B2 · kind B2 · utility

2Cited by
1References
12Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMay 14, 2019
Grant dateNov 17, 2020
Priority date
Expiry dateJun 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.