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MACK T-10 Matrix Analysis

MACK T-10 Matrix Analysis. August 8, 2001. Mack T-10 Tests. Soot and EGR rate evaluations Soot Average soot was calculated from 75 to 300 hours The range was 4.64 to 6.52 % The average of the 28 tests was 5.47 % A correction based on the average was defined as:

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MACK T-10 Matrix Analysis

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  1. MACK T-10 Matrix Analysis August 8, 2001

  2. Mack T-10 Tests • Soot and EGR rate evaluations • Soot • Average soot was calculated from 75 to 300 hours • The range was 4.64 to 6.52 % • The average of the 28 tests was 5.47 % • A correction based on the average was defined as: • Soot Var = Avg Soot - 5.47 • A soot correction was applied to Log(Pb), TRWL, CLW and Oil Consumption. • CO2 Rate • An adjustment for CO2 Rate (EGR) was attempted but these values are highly correlated with the Labs

  3. Ln (Delta Lead) • Model uses Labs, Stands, Technology, Base oils and Tech - Base oil interaction • TF model • RMSE 0.29 (13 df) R2 = 0.91 • Soot model • RMSE 0.29 (18 df) R2 = 0.88 • Increased soot increases Pb corrosion, 6.5% soot average will increase a 30 ppm Pb to 61. • The model includes: Soot, Labs, Tech, Stands, Base oils and Tech-Base Oil interactions. • One Oil has high Residuals • TF model with 27 points • RMSE 0.20 (16 df) R2 = 0.93

  4. Top Ring Weight Loss • Model uses Labs, Technologies, Base oils and Tech - Base oil Interaction • TF model • RMSE 28 (15 df) R2 = 0.49 • Soot Model • RMSE 23 (20 df) R2 = 0.54 • Increased Soot increases Ring Weight Loss • An average soot of 6.5% increases the average weight loss by 33 mg • The model includes Soot, Labs, Stands and Tech - Base oil interactions. • Several points have high residuals

  5. Top Ring Weight LossOil A • Soot Correction: • RWL = 132.56 + 39.38(Avg Soot - 5.47) • RMSE = 18.6 (df = 8) R2 = 0.43 • With lab and stand corrections: • RMSE = 6.7 (df = 5) R2 = 0.95

  6. Cylinder Liner Wear • Model uses Labs, Technologies, Base oils and Tech - Base oil Interaction • TF model • RMSE 4.4 (15 df) R2 = 0.69 • Soot Model • RMSE 4.0 (24 df) R2 = 0.64 • Increased Soot increases liner wear. • A 6.5 % soot test will have 5.7 um higher wear. • The model includes Soot, Labs, Stands, Base oils and Tech-Base oil interactions. • One high residual point

  7. Cylinder Liner WearOil A • Soot Correction: • CLW = 34.10 + 7.5(Avg Soot - 5.47) • RMSE = 3.54 (df = 8) R2 = 0.43 • With lab correction: • RMSE = 3.20 (df = 7) R2 = 0.59

  8. Oil Consumption • Model Uses Labs, Technologies, Base oils and Tech - Base oil interaction • TF Model • RMSE 8.6 (15 df) R2 = 0.56 • Soot Model • RMSE 7.3 (21 df) R2 = 0.56 • Increased soot increases oil consumption • A soot level of 6.5% will increase oil consumption 6.8 g/h • The model includes Soot, Labs and Stands • Several large residuals

  9. Summary • The addition of a soot correction • Does not improve prediction for the Ln(Pb) function • Provides reduced error of prediction for Ring Weight Loss but correlation is still poor. • Provides some reduced error of prediction for liner wear with some correlation • Oil consumption is not well correlated but soot level does provide a reduced prediction error

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