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Title: HCCI engine control by thermal management

Abstract

This work investigates a control system for HCCI engines, where thermal energy from exhaust gas recirculation (EGR) and compression work in the supercharger are either recycled or rejected as needed. HCCI engine operation is analyzed with a detailed chemical kinetics code, HCT (Hydrodynamics, Chemistry and Transport), that has been extensively modified for application to engines. HCT is linked to an optimizer that determines the operating conditions that result in maximum brake thermal efficiency, while meeting the restrictions of low NO{sub x} and peak cylinder pressure. The results show the values of the operating conditions that yield optimum efficiency as a function of torque and RPM. For zero torque (idle), the optimizer determines operating conditions that result in minimum fuel consumption. The optimizer is also used for determining the maximum torque that can be obtained within the operating restrictions of NO{sub x} and peak cylinder pressure. The results show that a thermally controlled HCCI engine can successfully operate over a wide range of conditions at high efficiency and low emissions.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
15013457
Report Number(s):
UCRL-JC-138891
Journal ID: ISSN 0148--7191; TRN: US200601%%443
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Journal Volume: 1; Conference: Society of Automotive Engineers International Fall Fuels and Lubricants Meeting and Exposition, Baltimore, MD, October 16-19, 2000
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 33 ADVANCED PROPULSION SYSTEMS; BRAKES; CHEMISTRY; COMPRESSION; CONTROL SYSTEMS; EFFICIENCY; ENGINEERS; ENGINES; FUEL CONSUMPTION; HYDRODYNAMICS; KINETICS; LUBRICANTS; MANAGEMENT; SUPERCHARGERS; THERMAL EFFICIENCY; TORQUE

Citation Formats

Martinez-Frias, J, Aceves, S M, Flowers, D, Smith, J R, and Dibble, R. HCCI engine control by thermal management. United States: N. p., 2000. Web. doi:10.4271/2000-01-2869.
Martinez-Frias, J, Aceves, S M, Flowers, D, Smith, J R, & Dibble, R. HCCI engine control by thermal management. United States. doi:10.4271/2000-01-2869.
Martinez-Frias, J, Aceves, S M, Flowers, D, Smith, J R, and Dibble, R. Thu . "HCCI engine control by thermal management". United States. doi:10.4271/2000-01-2869. https://www.osti.gov/servlets/purl/15013457.
@article{osti_15013457,
title = {HCCI engine control by thermal management},
author = {Martinez-Frias, J and Aceves, S M and Flowers, D and Smith, J R and Dibble, R},
abstractNote = {This work investigates a control system for HCCI engines, where thermal energy from exhaust gas recirculation (EGR) and compression work in the supercharger are either recycled or rejected as needed. HCCI engine operation is analyzed with a detailed chemical kinetics code, HCT (Hydrodynamics, Chemistry and Transport), that has been extensively modified for application to engines. HCT is linked to an optimizer that determines the operating conditions that result in maximum brake thermal efficiency, while meeting the restrictions of low NO{sub x} and peak cylinder pressure. The results show the values of the operating conditions that yield optimum efficiency as a function of torque and RPM. For zero torque (idle), the optimizer determines operating conditions that result in minimum fuel consumption. The optimizer is also used for determining the maximum torque that can be obtained within the operating restrictions of NO{sub x} and peak cylinder pressure. The results show that a thermally controlled HCCI engine can successfully operate over a wide range of conditions at high efficiency and low emissions.},
doi = {10.4271/2000-01-2869},
journal = {},
issn = {0148--7191},
number = ,
volume = 1,
place = {United States},
year = {2000},
month = {5}
}

Conference:
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