Exhaust Emission Standards

Document Sample
Exhaust Emission Standards Powered By Docstoc
					                    Emission Standards for
                      SI Marine Engines
    Presented By:
    John McKnight
    Director of Environmental & Safety Compliance
    November 2008




1
    Outline
       •   Overview of new standards
       •   Spark-ignition marine engine categories
       •   Program details
       •   Not-to-exceed zone
       •   Small businesses
       •   Evaporative emissions
       •   Questions



2
    Final Rule
    • On September 4, 2008, EPA Administrator Steve Johnson
      signed, into law, new exhaust and evaporative emission
      standards for spark-ignition marine engines and vessels.

    • These standards apply only to new engines and vessels
      sold for use in the United States.

    • The standards will help reduce
      harmful health effects of ozone
      and carbon monoxide from these
      products.
3
    Final Standards: Overview

    • HC+NOx exhaust emission standards for
      SI marine engines are similar in stringency
      to existing standards in California
    • New CO exhaust emission standards for all
      SI marine engines
    • New Not-to-Exceed provisions
    • New evaporative emission standards

4
    Engine Categories
     SI Marine
     • Outboards/PWC
     • Sterndrive/Inboards
        – Jetboats
        – High performance
        – Air boats
     • Marine generators

     Small SI as well



5
    Program Details
                      OB/PWC Engines

                                       SD/I Engines
      Certification                      Jetboats
                                         High performance

     Evaporative
                                       Generator Sets
      Small business
        provisions            NTE zone

6
    Outboards/PWC
      Pollutant   Maximum                     Standard             Model
                  Power (P)                   [g/kW-hr]            Year
      HC+NOx       ≤ 4.3 kW                      30                2010
                   > 4.3 kW         2.1 + 0.09 × (151 +557/P0.9)   2010
         CO         ≤ 40 kW                  500 – 5.0 × P         2010
                    > 40 kW                      300               2010

    • Same HC+NOx standards as CARB 2008
    • Can be achieved with existing technology
       – 2-stroke direct injection engines
       – 4-stroke engines
    • Will essentially phase-out carbureted 2-
      stroke engines
7
    OB/PWC Standards
                           OB/PWC HC+NOx Standard                                      OB/PWC CO Standard
                      90
                                                                             600
                      80
                                                 2006                        500
                      70
                                                 2010
      HC+NOx [g/kW-




                      60
                                                                             400




                                                              CO [g/kW-hr]
                      50
                                                                             300
                      40

                      30                                                     200

                      20
                                                                             100
                      10

                      0                                                       0
                           0   50   100   150    200    250                        0      50   100   150   200   250
8                               Maximum Power [kW]                                         Maximum Power [kW]
    SD/I Standards
     • Similar stringency as CARB 2008 standards
       – CO standard based on observed performance
     • Catalytic control for most engines
     • Credit program for jet boats using PWC engines
     • Engine-based standards for high-performance
       engines




9
     SD/I Standards
             Maximum Power                 HC+NOx               CO         Model
                                           [g/kW-hr]        [g/kW-hr]      Year
                 ≤ 373 kWa                     5.0              75          2010b
          High performance enginesc           20.0             350          2010
                  ≤ 485 kW                    16.0             350          2011
          High performance enginesc           25.0             350          2010
                  > 485 kW                    22.0             350          2011

      a This category also includes engines >373 kW that do not otherwise meet
      the definition of “high-performance.”
      b 2011 for small-businesses and for engines built using the 4.3L or 8.1L GM

      engine blocks.
      c For small businesses, the 2010 standards do not apply and the 2011

      standards are delayed until 2013.
10
     SD/I Provisions
     • Many similar provisions as for OB/PWC
       –   Averaging, banking, and trading
       –   Closed crankcase
       –   Emissions related warranty
       –   Similar test procedures
     • Some differences
       – Onboard diagnostics
       – No production line testing
       – No manufacturer run
         in-use test program
11
     GM Engine Blocks
     • Vast majority of SD/I marine engines
       built from GM engine blocks
     • Planned product line changes
       – Replace 4.3L with 4.1L                Vortec 4300
       – Replace 8.1L with supercharged 6.0L
     • Providing an additional year of lead
       time for SD/I engines built from
       these blocks


12                                             Vortec 8100
     High Performance Engines

     • Short useful life and warranty periods
     • No NTE standards
     • Most manufacturers eligible
       for small business provisions
     • Assigned emission factors
     • 15% torque at idle during test
     • Simplified testing


13
     Marine Generator Sets
         Engine         Size      HC+NOx          CO      Model
        Category                  [g/kW-hr]   [g/kW-hr]   Year
      Generator Sets   < 225 cc     10.0         5.0      2012
        ≤ 19 kW        > 225 cc      8.0         5.0      2011

     • Remain classified as small SI engines
     • Stringent CO standard based on new catalyst-
       equipped marine generators



14
     Off-Cycle Engine Operation




15
     Not-To-Exceed Standards
                         Catalyst Equipped Engines


                                                       1.5



                                          1.0




16      NTE standards are a multiplier times the E4 duty cycle certification value
     Not-To-Exceed Standards
                     4-Stroke (non-catalyst) Engines



                                                 1.4



                                      1.6




17      NTE standards are a multiplier times the E4 duty cycle certification value
     Not-To-Exceed Standards
                                2-Stroke Engines




18      NTE standards are a multiplier times the E4 duty cycle certification value
     Small Business Provisions

     •   Broad engine families for high performance
     •   Additional lead time for SD/I
     •   Early ABT bonus credits for SD/I
     •   No production line testing
     •   Assigned deterioration factors
     •   Economic hardship relief



19
     Evaporative Emissions
     • Portable tanks
       – Tank permeation
       – Self-sealing vent
     • Vessels
       – Hose and tank permeation
       – Diurnal emissions
       – Refueling spillage
     • Engines
       – Standards apply to hose & tanks
         directly mounted on engines
20

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:9
posted:2/29/2012
language:English
pages:20