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MMT VEHICLE TEST PROGRAM

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MMT VEHICLE TEST PROGRAM - PowerPoint PPT Presentation

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MMT VEHICLE TEST PROGRAM

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  1. MMT VEHICLE TEST PROGRAM Alliance of Automobile Manufacturers Association of International Automobile Manufacturers Canadian Vehicle Manufacturers’ Association July 2002

  2. Overview • Findings • Program Description • Test Fleet Results • Conclusions • Concerns • Recommendations

  3. Findings • Program demonstrated that MMT significantly: • increases HC emissions and causes LEVs to exceed HC standard • increases CO and NOx emissions • impairs catalyst and emission control system performance • increases fuel consumption

  4. Program Objectives • Resolve discrepancies reported to date about the effects of MMT • Determine MMT’s impact on • vehicle emissions • performance of emission control devices or systems

  5. Program Description • Statistically-designed program • Two matched pairs of each model • each pair has one MMT and one Clear fueled vehicle • FTP emission tests at specified mileage intervals • 4, 15, 25, 35, 50, 75, 100K • Controlled driving cycle for mileage accumulation • Emission tests using certification testing protocol

  6. Program Fuels • For mileage accumulation: • Clear: Chevron ULCQ (unleaded certification quality) • MMT: Clear + 1/32 g Mn/gal MMT • For emission tests: • California Phase 2

  7. Part 1 Vehicle Test Fleet • 10 models x 2 pairs/model = 40 vehicles • GM • 1996 S-10 Blazer (Tier 1) • 1997 Cavalier (TLEV) • 1997 Saturn (TLEV) • DaimlerChrysler • 1996 Intrepid (TLEV) • 1996 Neon (TLEV) • 1996 Caravan (TLEV) • Ford • 1997 Escort (TLEV) • 1996 Crown Victoria (TLEV) • Honda – 1996 Civic (LEV) • Toyota – 1996 Corolla (Tier 1) • Mileage accumulation 50K (75K for Civic)

  8. Part 1 Findings • Part 1 demonstrated that MMT: • increased fleet HC and CO emissions • decreased fleet NOx emissions • increased fleet fuel consumption • caused component failures • “Check Engine” light illumination, spark plug misfire on both Cavaliers • exhaust valve leakage on one Civic • caused both Civic LEVs to fail the 50K and 100K HC standards

  9. Development of Part 2 • Part 2 developed to address need for more information on LEV technology • LEV failures from Part 1 highlighted need to focus attention on LEV capable vehicles • LEV capable vehicles became available that were not available at start of Part 1 • Future emission levels will be even more stringent increasing concern for vehicle performance (common for cars and trucks)

  10. Part 2 LEV Test Fleet • 4 models x 2 pairs/model = 16 vehicles • Volkswagen – 1999 Beetle • DaimlerChrysler – 1998 Breeze • Ford – 1998 Escort • General Motors – 1999 Tahoe (MDV) • Mileage accumulation 100K

  11. LEV Test Fleet NMOG Emissions • NMOG emissions increase, MMT fueled LDVs fail standard

  12. LEV Test Fleet NOx Emissions • NOx emissions increase

  13. LEV Test Fleet CO Emissions • CO emissions increase

  14. LEV Test Fleet Fuel Economy • Fuel economy decreases

  15. Conclusions • Most comprehensive MMT test program to date shows that MMT significantly: • increases HC emissions and causes LEVs to exceed HC standard • increases CO and NOx emissions • impairs catalyst and emission control system performance • increases fuel consumption

  16. Concerns • Tier 2 benefit potential will not be achieved and air quality will be degraded • Vehicles will fail in-use emission standards • Customer dissatisfaction (e.g., I/M failures, fuel economy loss)

  17. Recommendations • Continue to treat vehicle and fuel as a system • Take appropriate regulatory action to prevent addition of / remove MMT in gasoline • Use existing Clean Air Act / Environmental authority