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Influence of Small Pilot on Main Injection in a Heavy-Duty Diesel Engine

Jorques Moreno, Carlos LU ; Stenlåås, Ola and Tunestål, Per LU (2017) SAE World Congress Experience 2017 In SAE Technical Paper
Abstract (Swedish)
Factors influencing the effect of pilot-injection on main-injection combustion were investigated using heat release analysis in a heavy-duty diesel engine fuelled with standard diesel fuel, and included the effect of those factors on engine performance and emissions.

Combinations of pilot injection parameters i.e. pilot start of injection, pilot mass, pilot-main injection separation, and rail pressure were studied for various operating conditions and combustion phases.

It was concluded that the effect of pilot-injection combustion on main injection can be studied based on the phase of pilot combustion at the start of main injection. Four cases were identified: a) main injection during the mixing phase of pilot injection;... (More)
Factors influencing the effect of pilot-injection on main-injection combustion were investigated using heat release analysis in a heavy-duty diesel engine fuelled with standard diesel fuel, and included the effect of those factors on engine performance and emissions.

Combinations of pilot injection parameters i.e. pilot start of injection, pilot mass, pilot-main injection separation, and rail pressure were studied for various operating conditions and combustion phases.

It was concluded that the effect of pilot-injection combustion on main injection can be studied based on the phase of pilot combustion at the start of main injection. Four cases were identified: a) main injection during the mixing phase of pilot injection; b) main injection during the premixed phase of pilot combustion; c) main injection during the diffusive phase of pilot combustion and d) main injection after pilot combustion was completed.

The effect of pilot injection was illustrated by the conceptual model of interaction modes. This approach has the advantage that the effect of each mode on the main injection is independent of the pilot injection parameters. For combustion control stability and convergence reasons, it is important to consider the transition between the four different interaction modes in regard to variances in the chamber conditions, pilot injected mass and pilot injection combustion. (Less)
Abstract
Factors influencing the effect of pilot-injection on main-injection combustion were investigated using heat release analysis in a heavy-duty diesel engine fuelled with standard diesel fuel, and included the effect of those factors on engine performance and emissions.Combinations of pilot injection parameters i.e. pilot start of injection, pilot mass, pilot-main injection separation, and rail pressure were studied for various operating conditions and combustion phases.It was concluded that the effect of pilot-injection combustion on main injection can be studied based on the phase of pilot combustion at the start of main injection. Four cases were identified: a) main injection during the mixing phase of pilot injection; b) main injection... (More)
Factors influencing the effect of pilot-injection on main-injection combustion were investigated using heat release analysis in a heavy-duty diesel engine fuelled with standard diesel fuel, and included the effect of those factors on engine performance and emissions.Combinations of pilot injection parameters i.e. pilot start of injection, pilot mass, pilot-main injection separation, and rail pressure were studied for various operating conditions and combustion phases.It was concluded that the effect of pilot-injection combustion on main injection can be studied based on the phase of pilot combustion at the start of main injection. Four cases were identified: a) main injection during the mixing phase of pilot injection; b) main injection during the premixed phase of pilot combustion; c) main injection during the diffusive phase of pilot combustion and d) main injection after pilot combustion was completed.The effect of pilot injection was illustrated by the conceptual model of interaction modes. This approach has the advantage that the effect of each mode on the main injection is independent of the pilot injection parameters. For combustion control stability and convergence reasons, it is important to consider the transition between the four different interaction modes in regard to variances in the chamber conditions, pilot injected mass and pilot injection combustion.
(Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
SAE Technical Paper
conference name
SAE World Congress Experience 2017
external identifiers
  • scopus:85018269831
ISSN
0148-7191
DOI
10.4271/2017-01-0708
language
English
LU publication?
yes
id
8ac01452-f1af-45dc-9afd-d264b6c09909
date added to LUP
2017-12-14 09:35:11
date last changed
2018-01-07 12:28:45
@inproceedings{8ac01452-f1af-45dc-9afd-d264b6c09909,
  abstract     = {Factors influencing the effect of pilot-injection on main-injection combustion were investigated using heat release analysis in a heavy-duty diesel engine fuelled with standard diesel fuel, and included the effect of those factors on engine performance and emissions.Combinations of pilot injection parameters i.e. pilot start of injection, pilot mass, pilot-main injection separation, and rail pressure were studied for various operating conditions and combustion phases.It was concluded that the effect of pilot-injection combustion on main injection can be studied based on the phase of pilot combustion at the start of main injection. Four cases were identified: a) main injection during the mixing phase of pilot injection; b) main injection during the premixed phase of pilot combustion; c) main injection during the diffusive phase of pilot combustion and d) main injection after pilot combustion was completed.The effect of pilot injection was illustrated by the conceptual model of interaction modes. This approach has the advantage that the effect of each mode on the main injection is independent of the pilot injection parameters. For combustion control stability and convergence reasons, it is important to consider the transition between the four different interaction modes in regard to variances in the chamber conditions, pilot injected mass and pilot injection combustion.<br/>},
  author       = {Jorques Moreno, Carlos and Stenlåås, Ola and Tunestål, Per},
  booktitle    = {SAE Technical Paper},
  issn         = {0148-7191},
  language     = {eng},
  month        = {03},
  title        = {Influence of Small Pilot on Main Injection in a Heavy-Duty Diesel Engine},
  url          = {http://dx.doi.org/10.4271/2017-01-0708},
  year         = {2017},
}