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Title: Dynamic control of a homogeneous charge compression ignition engine

Abstract

A homogenous charge compression ignition engine is operated by compressing a charge mixture of air, exhaust and fuel in a combustion chamber to an autoignition condition of the fuel. The engine may facilitate a transition from a first combination of speed and load to a second combination of speed and load by changing the charge mixture and compression ratio. This may be accomplished in a consecutive engine cycle by adjusting both a fuel injector control signal and a variable valve control signal away from a nominal variable valve control signal. Thereafter in one or more subsequent engine cycles, more sluggish adjustments are made to at least one of a geometric compression ratio control signal and an exhaust gas recirculation control signal to allow the variable valve control signal to be readjusted back toward its nominal variable valve control signal setting. By readjusting the variable valve control signal back toward its nominal setting, the engine will be ready for another transition to a new combination of engine speed and load.

Inventors:
 [1];  [2];  [2];  [3];  [2];  [2];  [4];  [4]
  1. Metamora, IL
  2. Peoria, IL
  3. Morton, IL
  4. Chillicothe, IL
Issue Date:
Research Org.:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
983066
Patent Number(s):
7380540
Application Number:
11/699,522
Assignee:
Caterpillar Inc. (Peoria, IL)
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02M - SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
DOE Contract Number:  
FC26-05NT42412
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Duffy, Kevin P, Mehresh, Parag, Schuh, David, Kieser, Andrew J, Hergart, Carl-Anders, Hardy, William L, Rodman, Anthony, and Liechty, Michael P. Dynamic control of a homogeneous charge compression ignition engine. United States: N. p., 2008. Web.
Duffy, Kevin P, Mehresh, Parag, Schuh, David, Kieser, Andrew J, Hergart, Carl-Anders, Hardy, William L, Rodman, Anthony, & Liechty, Michael P. Dynamic control of a homogeneous charge compression ignition engine. United States.
Duffy, Kevin P, Mehresh, Parag, Schuh, David, Kieser, Andrew J, Hergart, Carl-Anders, Hardy, William L, Rodman, Anthony, and Liechty, Michael P. Tue . "Dynamic control of a homogeneous charge compression ignition engine". United States. https://www.osti.gov/servlets/purl/983066.
@article{osti_983066,
title = {Dynamic control of a homogeneous charge compression ignition engine},
author = {Duffy, Kevin P and Mehresh, Parag and Schuh, David and Kieser, Andrew J and Hergart, Carl-Anders and Hardy, William L and Rodman, Anthony and Liechty, Michael P},
abstractNote = {A homogenous charge compression ignition engine is operated by compressing a charge mixture of air, exhaust and fuel in a combustion chamber to an autoignition condition of the fuel. The engine may facilitate a transition from a first combination of speed and load to a second combination of speed and load by changing the charge mixture and compression ratio. This may be accomplished in a consecutive engine cycle by adjusting both a fuel injector control signal and a variable valve control signal away from a nominal variable valve control signal. Thereafter in one or more subsequent engine cycles, more sluggish adjustments are made to at least one of a geometric compression ratio control signal and an exhaust gas recirculation control signal to allow the variable valve control signal to be readjusted back toward its nominal variable valve control signal setting. By readjusting the variable valve control signal back toward its nominal setting, the engine will be ready for another transition to a new combination of engine speed and load.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2008},
month = {6}
}

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