Advanced

Optical study on combustion transition from HCCI to PPC with gasoline compression ignition in a HD engine

Lundgren, Marcus LU ; Rosell, Joakim LU ; Richter, Mattias LU ; Andersson, Öivind LU ; Johansson, Bengt LU ; Arne, Andersson and Alden, Marcus LU (2016) SAE 2016 World Congress and Exhibition, 2016 In SAE 2016 World Congress and Exhibition 2016-April.
Abstract

The partially premixed combustion (PPC) concept has shown high efficiency with low soot emissions. However, the in-cylinder phenomena are still to be explained and evaluated for further progress in the research. This work studies the start of combustion process during a transition from homogenous charge compression ignition (HCCI) to PPC. The process is visualized using a heavy-duty, non-swirling engine modified for optical access. High speed video was used to capture the natural luminosity of the combustion. The fuel used was PRF87. Single and double injection strategies were used at a load kept to the moderate level of 7.5 bar IMEPg. Single injections were swept from early HCCI to retarded PPC conditions whilst running a cycle to... (More)

The partially premixed combustion (PPC) concept has shown high efficiency with low soot emissions. However, the in-cylinder phenomena are still to be explained and evaluated for further progress in the research. This work studies the start of combustion process during a transition from homogenous charge compression ignition (HCCI) to PPC. The process is visualized using a heavy-duty, non-swirling engine modified for optical access. High speed video was used to capture the natural luminosity of the combustion. The fuel used was PRF87. Single and double injection strategies were used at a load kept to the moderate level of 7.5 bar IMEPg. Single injections were swept from early HCCI to retarded PPC conditions whilst running a cycle to cycle temperature sweep, to capture the effect of injection timing and temperature differences simultaneously. Results show that retarded injections show less cycle-to-cycle variation due to temperature variations. Advanced in-bowl injections show a stochastic behavior in the location of the first combustion, due to large variations in local fuel rich zones. For the double injection case the main injection cools the bulk temperature and hence delays the start of combustion before igniting in the fuel rich zones.

(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 2016 World Congress and Exhibition
volume
2016-April
publisher
SAE International
conference name
SAE 2016 World Congress and Exhibition, 2016
external identifiers
  • scopus:84975290435
DOI
10.4271/2016-01-0768
language
English
LU publication?
yes
id
5d2d95e9-d108-4bbd-b5e6-fbd81f8ff75b
date added to LUP
2017-02-06 11:18:56
date last changed
2017-07-30 05:21:13
@inproceedings{5d2d95e9-d108-4bbd-b5e6-fbd81f8ff75b,
  abstract     = {<p>The partially premixed combustion (PPC) concept has shown high efficiency with low soot emissions. However, the in-cylinder phenomena are still to be explained and evaluated for further progress in the research. This work studies the start of combustion process during a transition from homogenous charge compression ignition (HCCI) to PPC. The process is visualized using a heavy-duty, non-swirling engine modified for optical access. High speed video was used to capture the natural luminosity of the combustion. The fuel used was PRF87. Single and double injection strategies were used at a load kept to the moderate level of 7.5 bar IMEPg. Single injections were swept from early HCCI to retarded PPC conditions whilst running a cycle to cycle temperature sweep, to capture the effect of injection timing and temperature differences simultaneously. Results show that retarded injections show less cycle-to-cycle variation due to temperature variations. Advanced in-bowl injections show a stochastic behavior in the location of the first combustion, due to large variations in local fuel rich zones. For the double injection case the main injection cools the bulk temperature and hence delays the start of combustion before igniting in the fuel rich zones.</p>},
  author       = {Lundgren, Marcus and Rosell, Joakim and Richter, Mattias and Andersson, Öivind and Johansson, Bengt and Arne, Andersson and Alden, Marcus},
  booktitle    = {SAE 2016 World Congress and Exhibition},
  language     = {eng},
  month        = {04},
  publisher    = {SAE International},
  title        = {Optical study on combustion transition from HCCI to PPC with gasoline compression ignition in a HD engine},
  url          = {http://dx.doi.org/10.4271/2016-01-0768},
  volume       = {2016-April},
  year         = {2016},
}