Results 91 to 100 of about 246 (136)

Controlling the start of combustion on an HCCI diesel engine

2008 American Control Conference, 2008
In this paper we propose a control strategy to improve stability of the combustion of HCCI engines during sharp transients. This approach complements existing airpath and fuelpath controllers, and aims at accurately controlling the start of combustion (soc).
Mathieu Hillion, Jonathan Chauvin, Nicolas Petit   +2 more
openaire   +1 more source

Modeling operation of HCCI engines fueled with ethanol

Proceedings of the 2005, American Control Conference, 2005., 2005
A mathematical engine model is developed to study the operation process in homogeneous charge compression ignition (HCCl) engines. Ethanol is used as an alternative fuel for testing in this model. Two-step reaction mechanisms are implemented to model combustion process for which Arrhenius reaction rates are used and heat transfer process is also ...
Faming Sun, Xiang Chen, David S.-K. Ting, Andrzej Sobiesiak   +3 more
openaire   +1 more source

Modeling and control of a two stroke HCCI engine

2008 American Control Conference, 2008
In this paper we propose a model of a two stroke homogeneous charge compression ignition (HCCI) engine which captures the important characteristics of gas exchange processes taking place in a two stroke mode. The model allows a direct flow of gases between intake and exhaust volumes and hence offers a more detailed gas modeling than single volume ...
Maxim V. Subbotin, Karl Lukas Knierim, Sungbae Park, Aleksandar Kojic, Jasim Ahmed   +4 more
openaire   +1 more source

HCCI engine control strategy with external EGR

Proceedings of the 2010 American Control Conference, 2010
Auto-ignited combustion in HCCI (Homogeneous Charge Compression Ignition) engine highly depends on temperature and composition of the cylinder charge. In this paper, a robust HCCI combustion controller is developed based on a control-oriented HCCI engine model. The controller indirectly manages the HCCI combustion by controlling burned gas fractions in
Jun-Mo Kang, Maria Druzhinina
openaire   +1 more source

HCCI Engine Operation with Acetylene the Fuel

SAE Technical Paper Series, 2008
<div class="htmlview paragraph">The homogeneous charge compression ignition (HCCI) engines emit low levels of smoke and NOx emissions. However, control of ignition, which is mainly controlled by fuel composition, the equivalence ratio and the thermodynamic state of the mixture, is a problem. In this work, acetylene was as the fuel for operating a
S. Swami Nathan, J. M. Mallikarjuna, A. Ramesh   +2 more
openaire   +1 more source

Fuel Requirements for HCCI Engine Operation

SAE Technical Paper Series, 2003
<div class="htmlview paragraph">Researchers at Southwest Research Institute (SwRI) have been working for the past several years on the fundamental and practical aspects of homogeneous charge compression ignition (HCCI) operation of reciprocating engines. Much of the work has focused on the use of diesel fuel.
Thomas W. Ryan, Andrew C. Matheaus
openaire   +1 more source

Dynamic Engine Control for HCCI Combustion

SAE International Journal of Engines, 2012
<div class="section abstract"><div class="htmlview paragraph">One of the factors preventing widespread use of Homogeneous Charge Compression Ignition or HCCI is the challenge of controlling the process under transient conditions. Current engine control technology does not have the ability to accurately control the individual cylinder states
John Lahti, John Moskwa
openaire   +1 more source

The Influence of NO on the Combustion Phasing in an HCCI Engine

SAE Technical Paper Series, 2006
<div class="htmlview paragraph">In this work the influence of NO on combustion phasing has been studied experimentally in a single cylinder HCCI engine. A isooctane/n-heptane blend (PRF), a toluene/n-heptane mixture (TRF) and a full boiling range gasoline were tested at two different operating conditions with NO concentrations ranging from 4 up ...
Per Risberg, David Johansson, Johan Andrae, Gautam Kalghatgi, Pehr Björnbom, Hans-Erik Ångström   +5 more
openaire   +1 more source

HCCI-Combustion in the Z Engine

SAE Technical Paper Series, 2012
<div class="section abstract"><div class="htmlview paragraph">The most common car engine is a 4-cylinder 4-stroke engine. The car manufacturers have a great pressure to lower the cost of the cars and this deal also with the engines. The challenges are the coming new emission norms (for example EURO-6) and also the custom acceptance, because
openaire   +1 more source

HCCI Combustion in DI Diesel Engine

SAE Technical Paper Series, 2003
<div class="htmlview paragraph">Ignition and combustion control of HCCI (Homogeneous Charge Compression Ignition) in DI (Direct Injection) Diesel Engine were examined. In this study, double injection technique was used by Common Rail injection system.
Ryo Hasegawa, Hiromichi Yanagihara
openaire   +1 more source