2013 DOE Annual Merit Review - ACCESS - Department of Energy
2013 DOE Annual Merit Review - ACCESS - Department of Energy
2013 DOE Annual Merit Review - ACCESS - Department of Energy
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<strong>2013</strong> <strong>DOE</strong> <strong>Annual</strong> <strong>Merit</strong> <strong>Review</strong> – <strong>ACCESS</strong> – Technical Accomplishment<br />
SI-HCCI Combustion Mode Switch: Performance<br />
Internal EGR<br />
50%<br />
40%<br />
30%<br />
20%<br />
10%<br />
<br />
<br />
HCCI<br />
SI<br />
1 1.1 1.2 1.3<br />
λ<br />
Mode Switch Strategy<br />
1. S I with low lift IV and E V<br />
2. Dethrottle S I increas ing<br />
iE G R while increas ing NV O<br />
3. R egulate comb. phas ing<br />
with S O I<br />
4. S witch into lean HC C I<br />
P ropos ed mode s witch s tra tegy demons tra ted<br />
robus t performa nce a t multiple opera tion pts .<br />
C los ed-loop S OI controller for combustion<br />
phas ing during mode s witch res ulted in<br />
improved transient response at S CR E<br />
CA CA 50<br />
[CAD]<br />
50<br />
(CAD)<br />
NMEP [bar]<br />
NMEP (bar)<br />
SOI SOI (CAD) [CAD]<br />
30<br />
20<br />
10<br />
Open loop<br />
0<br />
Closed loop<br />
Desired CA50<br />
-10<br />
0 5 10 15 20<br />
4.5<br />
4<br />
3.5<br />
No Controller SI<br />
3<br />
0 5 10 15 20<br />
420<br />
Engine cycle<br />
HCCI<br />
0 5 10 15 20<br />
420<br />
400<br />
380<br />
360<br />
SI<br />
HCCI<br />
340<br />
0 5 10 15 20<br />
Proposed combustion mode switch strategy demonstrated desired performance<br />
26<br />
Gasoline S ystems | 5/17/<strong>2013</strong> | © <strong>2013</strong> R obert Bosch LLC and affiliates. All rights reserved.
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