Maxx Air Group's Emission Reduction Technologies

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Find out how Maxx Air Group's emission reduction technologies can help green your fleet

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Maxx Air Group's Emission Reduction Technologies

  1. 1. Diesel Emissions Overview Phillip Surma
  2. 2. Bus Retrofit Overview • Maxx Air Group Introduction • Diesel Filter Technology Profiles • Engine Performance Profiles • DPF Selection • DPF Tips
  3. 3. Maxx Air Group Introduction • Maxx Air - West (California) – Sales, Installation, Service, DPF Cleaning • Maxx Air – Midwest (Illinois) – Sales, Installation, Service • Emission Control Technologies – R&D, Fleet Consulting & Management Services • QuickClean – DPF manufacturing
  4. 4. Maxx Air Group Introduction • Consulting and Technical Expertise on All Types of Diesel Particulate Filter Systems • Grant Application Assistance • Data Logging and Opacity Testing • Quality Installations • Maintenance Services • Diesel Particulate Filter Cleaning and Testing
  5. 5. Maxx Air Group Introduction Product Portfolio •Hug DPF Filter Systems •ECS DPF Filter Systems •KwickClean Filters •Huss DPF Filter Systems •CPK Data Loggers •Diesel Pre-heaters
  6. 6. Diesel Filter Technology Profiles DPF (substrate) Types •Partial or Flow Through Filters •15% to 60% •High Efficiency Wall Flow Filters •85% to 98%
  7. 7. Diesel Filter Technology Profiles Regeneration Types •Passive •Passive / Active (engine on) •Active (engine off) •Off Line
  8. 8. Diesel Filter Technology Profiles Oxidation Catalysts (DOC) A diesel oxidation catalyst consists of a stainless steel canister that contains a honeycomb structure called a substrate. The interior surfaces are coated with catalytic metals such as platinum or palladium. It is called an oxidation catalyst because the device converts exhaust gas pollutants into harmless gases by means of chemical oxidation.
  9. 9. Diesel Filter Technology Profiles Passive DPF To facilitate decomposition of the soot, a catalyst is used in the form of a coating on the filter. Filters that regenerate in this so- called "passive" fashion cannot be used in all situations. Despite the high efficiency of the catalyst, a layer of ash may build up on the filter requiring replacement or servicing. The ash is made up of inorganic oxides from the fuel or lubricants used in the engine and will not decompose during the regular soot regeneration process.
  10. 10. Diesel Filter Technology Profiles Passive / Active (engine on) In some applications or operating cycles, the exhaust never achieves a high enough temperature to completely oxidize the soot even in the presence of a catalyst. In these instances, an "active" regeneration system must be employed. Active regeneration utilizes a fuel injector nozzle upstream of the DOC element to heat the filter and oxidize the soot.
  11. 11. Diesel Filter Technology Profiles Engine off active regeneration utilizes a fuel burner or a resistively heated electric element to heat the filter and oxidize the soot. Active regeneration can be employed either in-place on the vehicle or externally. Active (engine off)
  12. 12. Diesel Filter Technology Profiles Typical Active DPF installation
  13. 13. Diesel Filter Technology Profiles The filter element of the KwikClean soot filter consists of a ceramic fiber knitted mesh, reinforced with a stainless steel core. This design makes it resistant against high temperatures without losing its flexibility. The filter module is fitted into the filter housing and held by a quick-release clamp for easy change out. Off-Line (Removable)
  14. 14. Engine Performance Profiles Data Logging •Data logging of the exhaust temperature, back pressure, and duty cycle is needed to determine the correct DPF technology for a given vehicle or group of vehicles in your fleet.
  15. 15. Engine Performance Profiles High Heat & Heavy Duty Cycle
  16. 16. Low Heat & Light Duty Cycle
  17. 17. DPF Selection Engine Model Year Temperature Profile Technology Type Operator Interaction In-Use Regeneration No Operator Action 15% - 40% Duty Cycle 400-520o F Engine on Regeneration No Operator Action Engine Off Regeneration Requires Button Push 5%-15% of Duty Cycle >360o F Temperature Not A or B “Low Temp” 1994 to 2006 (2012) <1994 Rebuild Repower Replace Engine A B C Passive Passive / Active Active Custom Filter Solution
  18. 18. DPF Tips • Match the correct emission system to the engine/duty cycle • Use pre-heaters in cold startup conditions – don’t idle for warm-ups • Perform de-ashing service using manufacturers recommendations • Correct installation = best system performance
  19. 19. Maxx Air Group Thank you

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