Decomposition Analysis of an Automotive Powertrain Design ...

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In-line TableA-3. Bearing size parameters. V-engine 1 rod/pin 2 rods/pin Kdm .6 .7 .62 Klm .37 .35 .4 Kdr .57 .6 .57 Klr .41 .36 .39
Appendix B: Parameters in Optimization Model Table B.1: Summary of optimization model parameters. Variable Description Value Units τ 0 Baseline 0-60 mph time 11 sec τ 1 Baseline 5-20 mph time 1.81 sec S o-4 Distance traveled 4 seconds on max. accel 88.4 ft α s Grade limit 30 % V c Cruising speed @ grade 65 mph A Vehicle frontal area 22.7 ft 2 Cd Vehicle body drag coefficient .33 Hcg Height of center of gravity 20.5 in M g Weight of vehicle 3537 lbf Ld Distance from center of gravity to driving axle 40.28 in Lnd Distance from center of gravity to non-driving axle 65.72 in Lw Wheelbase 106 in Sw Length of axle 60.2 in re Effective tire radius 12.24 in µo Coefficient of adhesion 1.00 Id Rotational inertia of driving wheel .62 lbf-ft-sec 2 Ind Rotational inertia of non-driving wheel .62 lbf-ft-sec 2 ngears Number of gears in gearbox 4 Ifd Rotational inertia of differential .0124 lbf-ft-sec 2 It Rotational inertia of torque converter turbine .0874 lbf-ft-sec 2 Ii Rotational inertia of torque converter impeller .0293 lbf-ft-sec 2 Ie Rotational inertia of engine .164 lbf-ft-sec 2 Nidle Engine idle speed 700 rpm vtype Valvetrain type pushrod etype Engine type V Cstiff Valvetrain stiffness factor .970 Cs System discharge coefficient .325 Cm Manifold discharge coefficient .650 Cp Port discharge coefficient .413 nbm Number of main bearings 4 ηcat Catalyst NOx effiecincy 0.90
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UNIVERSITY OF MICHIGAN DEPARTMENT O
Page 3 and 4:
epresentation facilitates decomposi
Page 5 and 6: of changes in these parameters on t
Page 7 and 8: The U.S. metro-highway fuel economy
Page 9 and 10: Powertrain Relationships The princi
Page 11 and 12: N ds = ξ fd N d (23) dN ds /dt =
Page 13 and 14: to be stalled (Rs = 0). Equation (3
Page 15 and 16: the surface-to-volume ratio at a vo
Page 17 and 18: intake and exhaust valve, and acros
Page 19 and 20: driveability. These values are stor
Page 21 and 22: τ dV τ 0-60 = τ :⌡ ⌠ dt dt =
Page 23 and 24: There are also several geometric co
Page 25 and 26: g 13 : ξ 1 / ξ 2 - 2.0 ≤ 0 Step
Page 27 and 28: x 2 h 2 (y, x 2 ) = 0 h 2 ( x 2 )=
Page 29 and 30: Master Problem Subproblem min f(y,
Page 31 and 32: 6 COORDINATED OPTIMIZATION SOLUTION
Page 33 and 34: educes fuel flow by 1.3%; the const
Page 35 and 36: Assanis, D.N., and Polishak, M. 198
Page 37 and 38: Patton, K.J., Nitschke, R.G., and H
Page 39 and 40: DECOMPOSITION ANALYSIS MODEL -BASED
Page 41 and 42: Master Problem Subproblem (i = 1, .
Page 43 and 44: 1 2 Impeller Stator Vortex flow dir
Page 45 and 46: Partitioned Graph Resultant FDT 111
Page 47 and 48: Table I Summary of Coordination Str
Page 49 and 50: Index Variable Partition Descriptio
Page 51 and 52: Index Variable Partition Descriptio
Page 53 and 54: 23 Fnd Fnd - ( Wd M g - ∆Wd) (fro
Page 55: 66 67 68 69 70 71 72 73 74 75 76 77
Page 59 and 60: Impeller Driving Table B.4: Base to
Page 61 and 62: Table B.8: Accessory losses. Amps @
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