# EPA-SwRI Update (12-3-15) • Testing Plan for Alternative Approach at SwRI – Cummins ISB 300hp rating (24 points) - completed – Cummins ISB 200hp rating (24 points) - completed 

## – Navistar N13 455hp rating (27 points) - completed – N13 engine with 365hp rating (27 points) - not started yet – Ford 6.8 liter gasoline engine - not started yet 

# • Numerical Method Update 1 DRAFT & DELIBERATIVE

# Global Regression – 24 models # Without intercept # With intercept With interaction 1 ~ 0 + HXX.NV * HXX.W 5 ~ 1 + HXX.NV * HXX.W

2 ~ 0 + HXX.N * HXX.T 6 ~ 1 + HXX.N * HXX.T 9 ~ 0 + HXX.N * HXX.W 11 ~ 1 + HXX.N * HXX.W Without interaction 3 ~ 0 + HXX.NV + HXX.W 7 ~ 1 + HXX.NV + HXX.W

4 ~ 0 + HXX.N + HXX.T 8 ~ 1 + HXX.N + HXX.T 10 ~ 0 + HXX.N + HXX.W 12 ~ 1 + HXX.N + HXX.W 

## • Dependent quantity on the left could be BSFC [g/kWh] or fuel mass [g] • Expression such as “N*T” in the above means linear terms in N, T, and the 

## product N*T. No other second-order dependence such as N^2 is included • HHX is just a symbol used to represent testing data 2

# Regression Model – Underlying Quantities • Only HXX data used (except for HXX.NV=HXX.N/GEM.V) • Previously used eclectic mix of GEM and HXX data 

## • GEM.V = (result.phase_distance_mi/result.phase_time_sec)*3600 • HXX.NV = HXX.N/GEM.V • HXX.T = (HXX.W*1000*3600/HXX.t)/(HXX.N*pi/30) • HXX.fuel = HXX.BSFC*HXX.W • Model 2 (BSFC) and model 8 (fuel) appear to be good overall 

## choices for MD and HD engines with respect to test cycles and ratings considered for this study. 3

# ISB Mapping Points for ARB Cycle DRAFT & DELIBERATIVE 4

# ISB BSFC for ARB DRAFT & DELIBERATIVE 5

# ISB Fuel Mass for ARB DRAFT & DELIBERATIVE 6

# ISB Mapping Points for 55mph Cycle DRAFT & DELIBERATIVE 7

# ISB BSFC for 55 mph DRAFT & DELIBERATIVE 8

# ISB Fuel Mass for 55mph DRAFT & DELIBERATIVE 9

# ISB Mapping Points for 65mph Cycle DRAFT & DELIBERATIVE 10

# ISB BSFC for 65mph DRAFT & DELIBERATIVE 11

# ISB Fuel Mass for 65mph DRAFT & DELIBERATIVE 12

# ISB Child Rating Points for ARB Cycle DRAFT & DELIBERATIVE 13 

## • Use 300hp rating map to predict 200hp rating • Green Points – 300hp rating • Red points – 200hp rating

# Child ISB BSFC for ARB DRAFT & DELIBERATIVE 14

# Child ISB Fuel Mass for ARB DRAFT & DELIBERATIVE 15

# Child ISB BSFC for 55mph DRAFT & DELIBERATIVE 16

# Child ISB Fuel Mass for 55mph DRAFT & DELIBERATIVE 17

# Child ISB BSFC for 65mph DRAFT & DELIBERATIVE 18

# Child ISB Fuel Mass for 65mph DRAFT & DELIBERATIVE 19

# HD N13 Mapping Points for ARB Cycle DRAFT & DELIBERATIVE 20

# N13 BSFC for ARB DRAFT & DELIBERATIVE 21 200 205 210 215 220 225 230 235 240 245 250200 210 220 230 240 250 Predicted BSFC [g/kWh] Measured BSFC [g/kWh]



## HD - ARB HXX.BSFC.predict.2 HXX.BSFC.predict.6 Dashed lines are ±5%

# N13 Fuel Mass for ARB DRAFT & DELIBERATIVE 22 1400 1600 1800 2000 2200 2400 2600 2800 3000 1400 1600 1800 2000 2200 2400 2600 2800 3000 Predicted Fuel Mass [g] Measured Fuel Mass [g]



## HD - ARB HXX.fuel.predict.3 HXX.fuel.predict.4 HXX.fuel.predict.7 HXX.fuel.predict.8 HXX.fuel.predict.10 HXX.fuel.predict.12 HXX.fuel.predict.6 Dashed lines are ± 5%

# HD N13 Mapping Points for 55mph Cycle DRAFT & DELIBERATIVE 23

# N13 BSFC for 55mph DRAFT & DELIBERATIVE 24 150 170 190 210 230 250 270150 170 190 210 230 250 270 Predicted BSFC [g/kWh] Measured BSFC [g/kWh]



## HD - 55 mph HXX.BSFC.predict.2 HXX.BSFC.predict.6 Dashed lines are ± 5%

# N13 Fuel Mass for 55mph DRAFT & DELIBERATIVE 25 3000 3500 4000 4500 5000 5500 6000 6500 3000 3500 4000 4500 5000 5500 6000 6500 Predicted Fuel Mass [g] Measured Fuel Mass [g] 

## HD - 55 mph HXX.fuel.predict.3 HXX.fuel.predict.4 HXX.fuel.predict.7 HXX.fuel.predict.8 HXX.fuel.predict.10 HXX.fuel.predict.12 HXX.fuel.predict.6 Dashed lines are ± 5%

# HD N13 Mapping Points for 65mph Cycle DRAFT & DELIBERATIVE 26

# N13 BSFC for 65mph DRAFT & DELIBERATIVE 27 150 170 190 210 230 250 270150 170 190 210 230 250 270 Predicted BSFC [g/kWh] Measured BSFC [g/kWh]



## HD - 65 mph HXX.BSFC.predict.2 HXX.BSFC.predict.6 Dashed lines are ± 5%

# N13 Fuel Mass for 65mph DRAFT & DELIBERATIVE 28 3000 3500 4000 4500 5000 5500 6000 6500 7000 7500 3000 3500 4000 4500 5000 5500 6000 6500 7000 7500 Predicted Fuel Mass [g] Measured Fuel Mass [g] 

## HD - 65 mph HXX.fuel.predict.3 HXX.fuel.predict.4 HXX.fuel.predict.7 HXX.fuel.predict.8 HXX.fuel.predict.10 HXX.fuel.predict.12 HXX.fuel.predict.6 Dashed lines are ± 5%