Kompetenscentrum Förbränningsprocesser,

KCFPProf. Bengt JohanssonDiv. of Combustion Engines,

Dept. of Energy Sciences

Kompetenscentrum Förbränningsprocesser,

KCFP• 1995-2005 ett centrum för grundläggande

studier av förbränning, både stationär och instationär

• 1/3 STEM, 1/3 Industri, 1/3 Lund Universitet, totalt minst 18 Mkr/år dvs. ca. 200 mkr omsatt

• Från 1/1 2006 ett centrum för motorförbränning• Nu ca. 22 Mkr/år varav STEM 7 Mkr.• Alla typer av förbränning skall studeras men

fokus på den nya generationen med låg NOx, HCCI

HCCI research in the world

The first conference dedicated to HCCI

From keynote talk by Pierre Duret at IFP International Congress Nov. 26-27 2001.

More recent

From keynote talk by Pierre Duret at IFP International Congress Sept. 22-23 2004.

Papers on HCCI the last 3.5 years

HCCI in Lund

Combustion activities in KCFP

1. Basic engine studies2. Laser diagnostics 3. Combustion modeling -

Chemical kinetics4. Closed loop combustion control5. Fuel effects

Per Amnéus Magnus Christensen

Mattias Richter

HCCI in Lund 1997

Olof Erlandsson

Per Amnéus Magnus Christensen

Mattias Richter

HCCI-Projects 1999

Anders Hultqvist Jan-Ola Olsson

Göran HaraldssonJari Hyvönen

Olof Erlandsson

Per Amnéus Magnus ChristensenPer Tunestål Jan-Ola Olsson

Mattias Richter

HCCI-Projects 2000

Anders Hultqvist

Göran HaraldssonJari Hyvönen

Olof Erlandsson

Per Amnéus Magnus ChristensenPer Tunestål Jan-Ola Olsson

Mattias Richter

Henrik Nordgren Leif HildingssonPetter Strand

HCCI-Projects 2001

Anders Hultqvist

Göran HaraldssonJari Hyvönen

(Olof Erlandsson)

Per Amnéus Magnus ChristensenPer Tunestål Jan-Ola Olsson

Mattias Richter

Henrik Nordgren Leif HildingssonPetter Strand

HCCI-Projects 2003

Göran HaraldssonJari Hyvönen

Per Amnéus Andreas VressnerPer Tunestål Roland Pfieffer

Mattias Richter

Henrik Nordgren Leif HildingssonPetter Strand

HCCI-Projects 2005

Ryo Hasegawa

HCCI?

HCCI=

Homogeneous Charge Compression Ignition

Kompressionsantändnin

g av en förblandad bränsle/luft-blandning

Why HCCI?

HCCI Emissions vs. diesel

HCCI

0,01

0,500,00

NOx

PM *

0,05

USA 2007

AutoTechnologyOct. 2002, p 54

Brake fuel efficiency for 1.6 liter four cylinder

VW engine

Clean locally or globally?

Global emission (Greenhouse effect):

CO2 i.e. fuel consumption

Local emissions:

NOx

HC

CO

PM

Environmentally friendly ≡ no CO2?

A CO2 neutral alternative

Local Emissions ?

Some emission statistics from New York by the turn of the century…

• 200 m3 liquid emissions per day

• 1000 ton solid emissions per day

• An army of tenths of thousands worked with transporting the emissions out from the city

Now time for the next step

Otto Diesel

HCCI

SACI PPCSACI=Spark AssistedCompression Ignition

PPC=Partially PremixedCombustion

Partially premixed combustion, PPC

• Def: region between truly homogeneous combustion, HCCI, and diffusion controlled combustion, diesel

• Trade-off between NOx and HC, soot typical

• Combustion process not well known

• Soot the key feature

-180 -160 -140 -120 -100 -80 -60 -40 -20

1000

2000

3000

4000

5000

6000Spridare 8x0.12x90 & 8x0.12x150, Iso-oktan, CR-tryck 750 bar, Duration 0,6 ms = 3.6 CAD

HC

[ppm

]

SOI [ATDC]-180 -160 -140 -120 -100 -80 -60 -40 -20

200

400

600

800

1000

1200

NO

x [p

pm]

PPC potential

Thank you