Patent · US Expired

Method and apparatus to operate a homogeneous charge compression-ignition engine

US7246597B2 · kind B2 · utility

13Cited by
17References
17Claims
0Family size

Assignee

Inventors

Key dates

Filing dateApr 6, 2006
Grant dateJul 24, 2007
Priority date
Expiry dateApr 6, 2026

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY02T10/12
  • WIPO fieldEngines, pumps, turbines
  • WIPO sectorMechanical engineering

Abstract

A method and apparatus for controlling engine operation to compensate for effects of combustion chamber deposits (CCDs) on combustion in a controlled auto-ignition engine is presented. Control methodologies comprise operation of variable valve actuation, fuel injection, spark timing, and intake air and coolant temperature to dynamically compensate for the effect of CCDs. A sensitivity to core gas temperature and chamber wall thermal conditions is shown, which is correlatable to in-cylinder CCD formation. Intake charge or coolant temperature control can be used to compensate for CCD effects. An engine control scheme relies upon a parametric input that quantifies instantaneous CCD formation in the combustion chamber. The result is further applicable to control pre-ignition in a conventional spark-ignition engine.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.