Concept

Consommation de carburant des véhicules automobiles

Publications associées (77)

Investigation of the prechamber geometrical configuration of a natural gas spark ignition engine for cogeneration; part. II, experimentation

The operation of the small size cogeneration gas engine (6 cylinders, 122mm bore, 142mm stroke) modified for unscavenged prechamber ignition was experimentally investigated. The objective was to evaluate the potential to reduce the exhaust gas emissions, p ...

2003

In-Cylinder Combustion Modeling With Simplified Chemistry

Daniel Favrat, Pénélope Leyland, Jan-Bernhard Vos

This paper deals with the simulation of HCCI combustion based on a generic rapid compression machine experiment as a test bed, and using a coupled CFD code-chemical kinetics code approach. Flow effects on the chemistry can hence be studied in this way. ...

2003

Investigation of the prechamber geometrical configuration of a natural gas spark ignition engine for cogeneration: part. I, numerical simulation

Daniel Favrat, Roger Röthlisberger

The effects and the consequences of transferring the ignition point of the conventional combustion chamber into a small unscavenged prechamber were evaluted through a numerical simulation based on the CFD-code KIVA- 3V. The prechamber flow characteristics ...

2003

Controlled Auto-Ignition (CAI) in Engine Combustion Prechamber

Daniel Favrat

Unscavenged prechamber ignition has recently been developed at LENI-EPFL to reduce the emissions from cogeneration spark ignition gas engines (natural gas and biogas) within the Swiss Motor project supported by the Federal Office of Energy. Prechambers fit ...

2003

Comparison between direct and indirect (prechamber) spark ignition in the case of a cogeneration natural gas engine, part II : engine operating parameters and turbocharger characteristics

Daniel Favrat, Roger Röthlisberger

In a first paper (part I), prechamber ignition in cogeneration natural gas engines has been shown to significantly intensify and accelerate the combustion process, offering a further potential to reduce the exhaust gas emissions while keeping efficiency at ...

2002

Rapport final BiogasMotor/ programme de recherche chaleur ambiante et rejets thermiques; installations chaleur-force.

Daniel Favrat

The object of this work is to test the unscavenged prechamber ignition system on a 150 kW cogeneration engine feed with biogas. The engine performances in term of fuel conversion efficiency are observed and the reduction potential f the exhaust emissions b ...

2002

An experimental investigation of a lean burn natural gas prechamber spark ignition engine for cogeneration

Roger Röthlisberger

The operation of a cogeneration internal combustion engine with unscavenged prechamber ignition was investigated. The objective was to evaluate the potential to reduce the exhaust gas emissions, particularly the CO emissions, below the Swiss limits (NOx an ...

EPFL2001

SPS: Projet d'une minicentrale pilote électro-thermo-solaire de 10 KWe.

Daniel Favrat, El Hadj Malick Kane

This report presents the field tests synthesis of a small Hybrid Solar Power Plant integrating three technologies : hermetic volumetric scroll expander - generators working with two superposed Organic Rankine Cycles (ORC) a cogeneration group composed by a ...

2001

Comparison between direct and indirect (prechamber) spark ignition in the case of a cogeneration natural gas engine, part I: engine geometrical parameters

Daniel Favrat, Roger Röthlisberger

2001

First and Second Law Based Fuel Minimization in a Batch Furnace

This paper presents results for the minimization of fuel consumption in a batch furnace. Several different criteria are used and minimized with respect to time- dependent process and control variables. As would be expected, the results show that globally t ...

1998

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