Combined Effect of Exhaust Gas Recirculation and Partially Premixed Charge on Diesel Combustion Behavior University of Lecce, Research Center for Energy and Environment (CREA)

Format:

Conference/Event

Author/Creator:

Carlucci, A. P., author.

Conference Name:

7th International Conference on Engines for Automobile (2005-09-11 : Naples, Italy)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Naples, ITALY Consiglio Nazionale delle Ricerche 2005

Summary:

The effects of exhaust gas recirculation (EGR) cooling, in combination with a partially-premixed charge obtained by a very advanced fuel injection (early injection), on the combustion of a Common-Rail Diesel engine, have been experimentally investigated. The combustion behavior, for different injection strategies, has been analyzed as well as the emission levels. Experimental tests have been carried out on a direct injection Fiat 1929 cm3 Common Rail Diesel engine. Two different injection strategies have been investigated: the first one was obtained performing pilot and main injections only, the second one adding an early injection. The effects on engine combustion of hot and water cooled EGR have been compared with the combustion behavior without EGR, also showing the effect produced by different pilot injection timings and quantities. Results show that cooled EGR can improve both pilot and early injection combustion causing an increase in the peak values of the heat release (GHRR), and a decrease of the NOx emissions. The use of a small early injection in addition to a pilot one contributes to reduce NOx emissions, causing a reduction of the peak heat release of pilot + early injection and an increase of the peak of heat release of main injection. NOx emissions can be reduced by the increase of EGR percentage, more with cooled than with hot EGR

Notes:

Vendor supplied data

Publisher Number:

2005-24-097

Access Restriction:

Restricted for use by site license