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Euro6 Evaporative emission JAMA Recommendation

30 th July Evaporative emission WS. Euro6 Evaporative emission JAMA Recommendation. 2. Contents. Outline on proposed test procedure 　（ JAMA’s understanding ） Recommendation on each scenario 2-1. Scenario1 (Reduction of purging time) 2-2. Scenario2 (Scenario1+2DBL ）

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Euro6 Evaporative emission JAMA Recommendation

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  1. 30th JulyEvaporative emission WS Euro6EvaporativeemissionJAMARecommendation

  2. 2 Contents • Outline on proposed test procedure　（JAMA’s understanding） • Recommendation on each scenario • 2-1. Scenario1(Reduction of purging time) • 2-2. Scenario2 (Scenario1+2DBL） • 2-3. Scenario3 (Scenario2+Durability) • 2-4. Scenario3+ (Scenario3+OBD) • 3.Conclusion

  3. 3 Contents • Outline on proposed test procedure　（JAMA’s understanding） • Recommendation on each scenario • 2-1. Scenario1(Reduction of purging time) • 2-2. Scenario2 (Scenario1+2DBL） • 2-3. Scenario3 (Scenario2+Durability) • 2-4. Scenario3+ (Scenario3+OBD) • 3.Conclusion

  4. 4 1. Outline on Proposed test procedure

  5. <Comparison of current test procedure and proposed procedure> • Outline on Proposed test procedure Proposed Test procedure Test procedure in US Current Test procedure Preconditioning drive Canister loading Canister loading Soak:12-36h Scenario1 Canister loading Preconditioning drive(18km) Part1+2×Part2 Conditioning drive (19km) Part1+Part2+2xPart1 Conditioning drive Hot soak loss test Conditioning drive(15km) Part1+Part2+Part1 Hot soak loss test Soak Soak 2g/test Scenario2 Hot soak loss test 1DBL 1DBL Worst 1day Worst 1day Soak 1DBL 1DBL <Additional> Durability OBD 1DBL Hot soak test + Worst 1 DBL Scenario3 2g/test Scenario3+

  6. 6 Contents • Outline on proposed test procedure　（JAMA’s understanding） • Recommendation on each scenario • 2-1. Scenario1(Reduction of purging time) • 2-2. Scenario2 (Scenario1+2DBL） • 2-3. Scenario3 (Scenario2+Durability) • 2-4. Scenario3+ (Scenario3+OBD) • 3.Conclusion

  7. 2. Recommendation on each scenario Air cleaner Breather line Fuel cap Purge valve Air filter Canister Air line 2way valve Inlet pipe Cut of valve Fuel tank <Outline on Evaporative system in EU>

  8. Air cleaner Breather line Fuel cap Purge valve Air filter Canister Air line 2way valve Inlet pipe Cut of valve Fuel tank 2-1. Recommendation on scenario1 [Reduction of purging time] <Technical measure & Issue> Purge valve => Purge volume UP For HEV, additional measure might be necessary HV車等は 更にUPする 可能性あり Pipe diameter => UP Issue： Big layout change is necessary. ( In the worst case, plat form change might be necessary)

  9. 9 2-1. JAMA recommendation on scenario1 [Reduction of purging time] - Enough lead-time is necessary for full model change. (5 years are necessary for technical development in case it becomes necessary to change plat form) - Align the driving pattern with emission test (Part1+2xPart2 : 18km)

  10. Air cleaner Breather line Fuel cap Purge valve Air filter Canister Air line 2way valve Inlet pipe Cut of valve Fuel tank 2-2. Recommendation on scenario2 [2DBL] <Technical measure & Issues> Canister ⇒1. Improved carbon 2. Size-up For HEV, additional measurethat lower a pressure loss might be necessary ex) Canister ⇒ Size-up by using pellet carbon Pipe diameter ⇒ UP Issue： Big layout change is necessary. (In the worst case, the plat form change might be necessary)

  11. 2-2. Recommendation on scenario2 [2DBL] <Impact by canister size-up & Countermeasure> Top view Where? How to install? Fuel tank In case canister size-up is necessary, the impacts on vehicles (body, P/F area etc) is significant. ex) 0.7L in-tank canister in EU ⇒2.0L US canister

  12. 12 2-2. Recommendation on scenario2 [2DBL] Enough lead-time is necessary for full model change. (5 years are necessary for technical development in case it becomes necessary to change plat form)

  13. 2-3. Recommendation on scenario3 [Durability] Durability Requirements should not be introduced • <Justification> • LAT evaluation showed the impact from E10 fuel on permeation performance and durability of the canister is low. • 2. The system which is ethanol fuel compatible have been introduced from Euro5. • (With progress of introduction of new vehicles in near future, deterioration of evaporative emission in the market by ethanol fuel becomes smaller.) • 3. Test burden should be increased unnecessarily

  14. 2-4. JAMA position on scenario3 [OBD] OBD Requirements should not be introduced • <Justification> • JRC under-estimated the OBD cost. • We estimated more than 3 times. • 2. We do not believe that it becomes cost-effective.

  15. 15 Contents • Outline on Euro6 draft test procedure　（JAMA understanding） • JAMA position on each scenario • 2-1. Scenario1(Reduction of purge distance) • 2-2. Scenario2 (Scenario1+2DBL） • 2-3. Scenario3 (Scenario2+Durability) • 2-4. Scenario3+ (Scenario3+OBD) • 3.Conclusion

  16. 3. Conclusion • JAMA support scenario2 on the condition of 5 years lead time => need to clarify the test condition by the end of 2012 to introduce new requirement from 2017 • JAMA recommend to align the driving pattern with emission test about conditioning drive.

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