This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Control of Diesel Engine Pollutants by Split Injection Method using Muitizone Model
ISSN: 0148-7191, e-ISSN: 2688-3627
Published November 01, 2001 by The Automotive Research Association of India in India
Annotation ability available
Event: SIAT 2001
The reduction of NOx without the degradation of soot emission and/or fuel economy necessitates the grasp of the in-cylinder temperature behavior, since NOx is mainly generated within localized high temperature regions in the cylinder of diesel engines. Therefore, a split injection method to reduce NOx has been proposed.
In this method, injection is divided into two steps, the main injection of larger quantity and the sub-injection of smaller quantity. The sub-injection is practiced late into the flame of the main injection fuel. The moment of flame tip approaches the nozzle hole, the sub-injection is practiced, and the sub-injection spray folded in the flame. This attempted to control the localized high temperature regions by promoting the mixing of in-cylinder gases owing to supplementary fuel injection energy. Thus split injection suppresses the formation of nitrogen oxide.
In this study, a four-zone model is used in predicting the emissions particularly of NO with the application of split injections. The combinations of single injection and split injections of 40-60, 35-65, 30-70, 25-75 and 20-80 proportions were tried. The combinations with different crank angle intervals of 3°, 4°, 5°, 6° and 7° between the main and sub-injection were also investigated. The combinations of single injection, split injection proportions and crank angle intervals were selected based on Nehmer et al . Also the effect of design and operating conditions of engines on the emission of NO, CO and Soot with optimized spilt injection proportion of 30-70 and a gap of 5 degrees crank angle were studied.
CitationBabu, A. and Devaradjane, G., "Control of Diesel Engine Pollutants by Split Injection Method using Muitizone Model," SAE Technical Paper 2001-28-0007, 2001, https://doi.org/10.4271/2001-28-0007.
- Annand.W.J.D. “Heat Transfer in the Cylinder of reciprocating internal combustion engines” Proc. I. Mech.E London, 177 (1963 ) 973 - 993.
- Baluswamy.N. “Calculation of gaseous products during combustion in diesel engine using four zone model” SAE paper No. 770410.
- Devaradjane.G. “Multizone Modeling and Prediction of Pollutants of an Automotive Diesel Engine”, Ph.D Thesis, Anna University, 1998.
- Nehmer.D.A & Reitz.R.D.“Measurement of the effect of Injection rate and split injections on diesel engine Soot and NOx emission” SAE paper No.940688 (1994).
- Zhiya, Ali Uludogan, ReitzRoce.D.. “Mechanism of Soot and NO emission reduction using multi injection in a diesel engine”, SAE paper No. 960633 (SP 1169), (1996)