Results 141 to 150 of about 291 (183)

Physical Modeling and Control of Homogeneous Charge Compression Ignition (HCCI) engines

2008 47th IEEE Conference on Decision and Control, 2008
Due to the possibility of increased efficiency and reduced emissions, homogeneous charge compression ignition (HCCI) is a promising alternative to conventional internal combustion engines. Ignition timing in HCCI is highly sensitive to operating conditions and lacks direct actuation, making it a challenging subject for closed-loop control.
Anders Widd, Per Tunestål, Rolf Johansson 0001   +2 more
openaire   +1 more source

Homogeneous-Charge Compression-Ignition (HCCI) Engines

SAE Technical Paper Series, 1989
<div class="htmlview paragraph">Homogeneous Charge Compression Ignition (HCCI) combustion can be made to occur in a four-stroke engine with smooth and even combustion under some circumstances. It offers the possibility of light load operation without throttling, thus giving fuel economy like a diesel, in the same engine allowing full load ...
openaire   +1 more source

Constrained control of Homogeneous Charge Compression Ignition (HCCI) engines

2010 5th IEEE Conference on Industrial Electronics and Applications, 2010
Homogeneous Charge Compression Ignition (HCCI) engines provide a possible solution for affordable, efficient and clean-burning power sources for either stationary power generator or advanced vehicles. In fact, HCCI engines integrate the advantages of both the spark ignition (SI) and compression ignition (CI) engines: (i) high fuel efficiency resulting ...
Chia-Jui Chiang, null Chian-Ling Chen
openaire   +1 more source

Chemiluminescence Measurements of Homogeneous Charge Compression Ignition (HCCI) Combustion

SAE Technical Paper Series, 2006
<div class="htmlview paragraph">A spectroscopic diagnostic system was designed to study the effects of different engine parameters on the chemiluminescence characteristic of HCCI combustion. The engine parameters studied in this work were intake temperature, fuel delivery method, fueling rate (load), air-fuel ratio, and the effect of partial fuel
R. Augusta, David E. Foster, J. B. Ghandhi, J. Eng, P. M. Najt   +4 more
openaire   +1 more source

Bio-diesel in homogeneous charge compression ignition (HCCI) combustion

Renewable and Sustainable Energy Reviews, 2016
Abstract The continuously growing energy demands and the fast depleting fossil fuels reserves has led the research towards seeking alternative fuels and combustion concepts to combat the challenges. Biodiesel is one of the potential alternative fuels due to its being renewable in nature.
Pravin Kumar, A. Rehman
openaire   +1 more source

Hybrid modelling of homogeneous charge compression ignition (HCCI) engine dynamics—a survey

International Journal of Control, 2007
The Homogeneous charge compression ignition (HCCI) principle holds promise to increase efficiency and to reduce emissions from internal combustion engines. As HCCI combustion lacks direct ignition timing control and auto-ignition depends on the operating condition, control of auto-ignition is necessary.
Johan Bengtsson, Petter Strandh, Rolf Johansson 0001, Per Tunestål, Bengt Johansson   +4 more
openaire   +1 more source

Stability Analysis in Homogeneous Charge Compression Ignition (HCCI) Engines With High Dilution

IEEE Transactions on Control Systems Technology, 2007
This paper analyzes the stability of the autoignition process of homogeneous charge compression ignition (HCCI) engines with exhaust dilution. We find conditions under which steady-state multiplicity exists with stable and unstable equilibria. This analysis is conducted taking into account the internal feedback structure of the thermal dynamics ...
Chia-Jui Chiang, Anna G. Stefanopoulou
openaire   +2 more sources

Model Predictive Control of Homogeneous Charge Compression Ignition (HCCI) Engine Dynamics

2006 IEEE International Conference on Control Applications, 2006
The Homogeneous Charge Compression Ignition (HCCI) combustion principle lacks direct ignition timing control, instead the auto-ignition depends on the operating condition and fast combustion phasing control is necessary for reliable operation. A six-cylinder heavy-duty HCCI engine was controlled on a cycle-to-cycle basis in real time using a variety of
Johan Bengtssonv, Petter Strandhv, Rolf Johansson, Per Tunestal, Bengt Johansson   +4 more
openaire   +1 more source

Hybrid control of homogeneous charge compression ignition (HCCI) engine dynamics

International Journal of Control, 2006
The homogeneous charge compression ignition ( HCCI) combustion engine principle lacks direct ignition timing control, instead the auto-ignition depends on the operating condition. Since auto-ignition of a homogeneous mixture is very sensitive to operating conditions, fast combustion phasing control is necessary for reliable operation. For this paper, a
J. Bengtsson, P. Strandh, R. Johansson, P. Tunestål, B. Johansson   +4 more
openaire   +1 more source

Reacting Boundary Layers in a Homogeneous Charge Compression Ignition (HCCI) Engine

SAE Technical Paper Series, 2001
<div class="htmlview paragraph">An experimental and computational study of the near-wall combustion in a Homogeneous Charge Compression Ignition (HCCI) engine has been conducted by applying laser based diagnostic techniques in combination with numerical modeling.
Anders Hultqvist, Ulf Engdar, Bengt Johansson, Jens Klingmann   +3 more
openaire   +1 more source