2011-12-07 Innovations in FSAE:Joanneum Racing
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Transcript of 2011-12-07 Innovations in FSAE:Joanneum Racing
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TECHNISCHE HÖCHSTLEISTUNGEN AUSFORMULA STUDENT
INNOVATIONEN DER GRAZER TEAMS
Motor und Getriebe
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Vorschau
ReglementAntriebsstrang
Antriebsstrang 2010 &2011
Konzept für
Antriebsstrang 2012
Projekt bei/mitMercedes AMG
Auslegung des Motors Antriebsstrang 2012
Michael Resel Alexander Habermann
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Reglement Antriebsstrang 4-Takt Hubkolbenmotor
Vh ≤ 610 cm³ Luftrestriktor d = 20 mm (19 mm)
Drosselorgan -> Restriktor -> (Aufladeaggregat)-> Motor
kein E-Gas
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Anforderungsprofil ↑ Zuverlässigkeit
↑ Fahrbarkeit ↑ Leistungsdaten
↓ Gewicht ↓ Treibstoffverbrauch
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Konzeptentscheidung 2010
Konzept Effizienz
Leistung/
Moment Wartung Gewicht
Kompressor-Motor
Saugmotor
Kombinierte Aufladung
(Turbo + Kompressor)
Turbo-Motor
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Antriebsstrang 2010 1-Zylinder 450 cm³
Turboaufladung MoTec – ECU
Hydraulik
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450 cm³ ? Restriktor
Aufladung ↓ Gewicht
Downsizing
RsthAm 240
max,=&
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Entwicklung 450 cm³ E85
Verbrennung Kolben & Pleuel
Turbolader Ladungswechsel
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Kolben & Pleuel Brennraum-Design
Massenausgleich Spitzendruck > 120 bar
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Turbolader Anforderungen Unterdruck
Ansprechverhalten Druckverhältnis 2
Abgastemperatur 850 °C
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Turbolader Garrett GT12 Aerocharger 53 Series
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Ölverlust 2 Kolbenringdichtungen
Druckdifferenz
Entwicklungsschleifen
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Turbolader-Entwicklung
originalLager-
gehäuse
Ein-schweißteil
ausgedrehtesLager-
gehäuse
fertigbearbeitetes
Gehäuse
modifizierteDichtungs-
aufnahme
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Turbolader-Ölverbrauch Test @ 4000 U/min 60 kPa
original: 0,7 l/h
0,485 l/h
0,09 l/h
Entwicklungsstand 2011:0,065 l/h
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Ladungswechsel Auslassnockenwelle
0 120 240 360 480 600 7200,00
2,00
4,00
6,00
8,00
10,00
12,00
Kurbelwinkel (°)
V e n t i l h u b ( m m )
Ventilerhebungskurven
Einlassnockenwelle
AuslassnockenwelleserieAuslassnockenwellekurz
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Ladungswechsel mögliche Steuerzeiten
0 120 240 360 480 600 7200,00
2,00
4,00
6,00
8,00
10,00
12,00
Kurbelwinkel (°)
V e
n t i l h u b ( m m )
Ventilerhebungskurven
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Motorprüfstand Abgas-
gegendruck Ventilüber-
schneidung
Nocken-wellen
Turbolader
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Prüfstand-Ergebnisse
max. Moment:
65 Nm @ 5500 –
7000 rpm
+55 %
max. Leistung:
49 kW @ 8500 rpm
+51 %
2500 3500 4500 5500 6500 7500 8500 9500 105000,00
10,00
20,00
30,00
40,00
50,00
60,00
70,00
Drehzahl (U/min)
M o m e n t ( N m ) / L e i s t u n g ( k W )
Drehmoment / Leistung – jrX vs Rotax 449
M_jrX
P_jrXM_Rotax 449
P_Rotax 449
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Ausschreibung Mercedes AMG
80 FS-Teams
Konzept für FS-Motor
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Auswahlverfahren80 FS
Teams
9 FSTeams
4 FSTeams
2 FSTeams
Herbst2010
Dezember2010
Jänner2011
März2011
Konzepte anMercedes AMG
Assessment Centerbei MercedesAMG
Projektstart beiMercedes AMG
Auswahl von 9 aus 80Teams für mögliche
Zusammenarbeit
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Konzeptfindung/Nutzwertanalyse
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Konzept AMG
2-Zylinder Reihenmotor
Getriebe & Differential integriert Trockensumpf
Direkteinspritzung
Turboaufladung
mittragend
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Assessment Tag Jänner 2010
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Zeitplan
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Ziele
Renneinsatz 2012 des FS133 am FS Bewerb England
Top Ten Platzierung Leistung 75 kW
Verbrauch <3,5 l / Endurance
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Randbedingungen
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Randbedingung
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Auszug Datenblatt FS133
Bohrung 83 mm
Hub 55 mm
Hubraum 596 cm³Abregeldrehzahl 7500 1/min
Verdichtungsverhältnis 10 bzw. 11
Mitteldruck 23 barmax. Zünddruck 130 bar
max. Ladedruck 1,3 bar
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Ladungswechselsimulation
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Steuerzeitenauslegung
0
1
2
3
4
5
6
7
8
9
10
-280 -240 -200 -160 -120 -80 -40 0 40 80 120 160 200 240 280
V e n t i l h u b
i n m m
KW in °
LWOT
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Ladungswechselsimulation
Versuch 1 Spreizungsvariation
Öffnungszeitenvariation
Drehzahl: 6500 min-1
Ziel: Höchste Leistung
Versuch 2 Spreizungsvariation
Drehzahl: 3000 min-1
Ziel: Höchstes Drehmoment
0
1234567
89
10
-280-240-200-160-120 -80 -40 0 40 80 120 160 200 240 280
01234567
89
10
-280-240-200-160-120 -80 -40 0 40 80 120 160 200 240 280
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Steuerzeit
0
1
2
3
4
5
6
7
8
9
10
-280 -240 -200 -160 -120 -80 -40 0 40 80 120 160 200 240 280
V e n t i l h u b i n m m
Kurbelwinkel in °
Einlass 185°KW Auslass 185°KW HDP Profil 138 Kolbenhub (mm)
LWOT
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Ventiltriebsdynamik
-80
-60
-40
-20
0
20
40
60
80
-20
-15
-10
-5
0
5
10
15
20
100 120 140 160 180 200 220 240 260
Nockenwinkel in °
s (mm) v (mm/rad) a (mm/rad²)
s,v a
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Kurbelwellenkröpfung/Zündfolge
gleichlaufend
360° - 360°
gegenlaufend
180° - 540°
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Kurbelwellenkröpfung/Zündfolge
0
10
20
30
40
50
60
70
80
90
100
110
120
0 1000 2000 3000 4000 5000 6000 7000 8000
D r e h m o m e n t ( N m )
L e i s t u n g
( k W )
Motordrehzahl (min-1
)
Drehmoment gegenlaufend
Leistung gegenlaufend
Drehmoment gleichlaufend
Leistung gleichlaufend
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Massenkräfte Kurbeltrieb
Rotierende + oszillierendeMassen
-35
-15
5
25
45
-25 -15 -5 5 15 25
Fx in
kN
Fz in kN
unbalanced mass forcesrot. + osz. Massenkräfte
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Massenkräfte Kurbeltrieb
Rotierende + oszillierendeMassen
Ausgleich Kurbelwelle:
100% rotierendeMassen
50 % oszillierendeMassen
-35
-15
5
25
45
-25 -15 -5 5 15 25
Fx in
kN
Fz in kN
unbalanced mass forces
remaining mass forces
rot. + osz. Massenkräfte
Verbleibende Massenkräfte
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Ausgleichswelle
Reduzierung derMassenkräfte
Drehrichtung gegen
Kurbelwelle
-7
-2
3
8
13
-10 -5 0 5 10
Fx in kN
Fz in kN
without balancing shaftohne Ausgleichswelle
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Ausgleichswelle
50 % oszillierendeMassen
Massenkräfte 2.O
nicht ausgeglichen
-7
-2
3
8
13
-10 -5 0 5 10
Fx in kN
Fz in kN
without balancing shaft
with balancing shaft
ohne Ausgleichswelle
mit Ausgleichswelle
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Massenmomente
-1.000
-750
-500
-250
0
250
500
750
1.000
0 90 180 270 360
KW in °
Massenmoment durch Ausgleichswelle Massenmoment durch KolbenseitenkraftSumme der Massenmomente durch Massenkräfte
-1.000
-750
-500
-250
0
250
500
750
1.000
0 90 180 270 360
KW in °
FS 133 Rotax 450
M a s s e n m o m e
n t i n K u r b e l w e l l e n a c h s r i c h t u n g i n
N m
M a s s e n m o m e
n t i n K u r b e l w e l l e n a c h s r i c h t u n g i n
N m
Massenmoment durch AusgleichswelleMoment durch KolbenseitenkraftSumme der Momente
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Zugkraftdiagramm
0
1
2
3
4
0 10 20 30 40 50 60 70 80 90 100 110 120 130
F i n k N
v in km/h
75 kW
1st gear
2nd gear
3rd gear
4th gear
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