Title: Effect of EGR on performance and emission characteristics of diesel engine at advanced injection timing

Authors: S. Saravanan; G.Lakshmi Narayana Rao

Addresses: Sri Venkateswara College of Engineering, P.B. No: 3, Pennalur, Sriperumbudur, Tamilnadu, 602105, India ' QIS Institute of Technology, Ongole, 523272, Andhra Pradesh, India

Abstract: This work attempts to reduce the smoke density of diesel engine by advancing the fuel injection timing and also the NOx emission of the engine by introducing EGR at the advanced injection timing. A single cylinder 4.4 kW air cooled, naturally aspirated, stationary diesel engine was utilised for the investigation. Engine tests were conducted at different loads at standard injection timing and advanced injection timing with and without EGR and performance and emission parameters were measured. It was observed that the smoke density was decreased by 33% at advanced injection timing with 20% increase in NOx emission. As a result of EGR, NOx emission was decreased by 63% with marginal increase in smoke density. The increase in smoke density resulted from EGR is lower than the smoke density of the engine at standard injection timing. Advanced injection timing with EGR increases the maximum heat releases rate of the engine. [Received: August 27, 2012; Accepted: March 15, 2013]

Keywords: diesel engines; fuel injection timing; EGR; exhaust gas recirculation; NOx emissions; nitrogen oxides; smoke density; engine emissions; heat release rate.

DOI: 10.1504/IJOGCT.2014.060072

International Journal of Oil, Gas and Coal Technology, 2014 Vol.7 No.3, pp.335 - 345

Received: 29 Aug 2012
Accepted: 15 Mar 2013
Published online: 24 May 2014 *

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