Biodiesel Fleet Maintenance

  • 908 views
Uploaded on

 

More in: Technology , Business
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads

Views

Total Views
908
On Slideshare
0
From Embeds
0
Number of Embeds
1

Actions

Shares
Downloads
37
Comments
0
Likes
0

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide

Transcript

  • 1. Maintaining your Diesel Fleet for Biodiesel National Biodiesel OEM Technician Training Program
  • 2. Today’s Topics
    • Biodiesel Definition
    • Key Properties of Biodiesel
    • Fuel System, Air Intake, & Lubrication
    • Starting, Charging, Cooling, & Vacuum systems
    • Exhaust & Emissions Controls
    • Resources
  • 3. Biodiesel Defined
    • Biodiesel , n. -- a fuel comprised of mono-alkyl esters of long chain fatty acids derived from vegetable oils or animal fats, meeting ASTM D 6751, designated B100.
    • Biodiesel Blend , n. -- a blend of biodiesel fuel with petroleum-based diesel fuel designated BXX, where XX is the volume percent of biodiesel.
      • This tight definition was needed in order to secure vehicle, engine and fuel injection equipment company support for biodiesel, as well as to secure ASTM specs
  • 4. Biodiesel (B100) Attributes
    • High Cetane (avg. over 50)
    • Ultra Low Sulfur (avg. ~ 2 ppm)
    • High Lubricity, even in blends as low as 1-2%
    • High Energy Balance (3.5 to 1)
    • Renewable, Sustainable, Domestically Produced
    • Increases overall fuel production capacity in USA
    • Reduces HC, PM, CO in existing diesel engines
  • 5. Enhanced Lubricity
    • Equipment benefits
      • Superior lubricity
      • B2 has up to 66% more lubricity than #2 Diesel
    • EPA required sulfur reduction in 2006
    • No overdosing concerns vs. other lubricity additives
  • 6. Cold Weather Performance
    • Pure biodiesel does freeze faster than most petrodiesel
    • Your B20 supplier should provide blends of B20 that will not cause any cold flow issues in the winter
      • Exactly the same way they do with #2 diesel fuel
    • There are a variety of tools at the disposal of distributors to improve the cold flow operability of #2 petrodiesel and biodiesel blends
      • Blending with #1, cold flow additives, etc.
    • B20 has been used successfully in climates below -20 º F
  • 7. Biodiesel Fuel Stability
    • The biodiesel specification contains parameters for insuring adequate fuel stability for normal applications
    • The shelf life of biodiesel blends is recommended by NBB as 6 months
    • Stability additives available on the open market
  • 8. Solvency Effect
    • B20 & Under
    • Monitor filters, less than 2% need to be changed
    • Mild cleaning effect
    • Storage tanks may need to be cleaned, or keep extra filters on hand at start up
    • Housekeeping protocols for generic diesel equally important prior to blending
  • 9. Fuel System
    • Material compatibility is key for higher blends
    • Repair Fuel leaks to prevent impact to other systems!
    • From the fuel sending unit in tank to injectors
    • -primary & secondary fuel filters
    • -Fuel lines (sending & return)
    • -High pressure or
    • low pressure injectors
    • - o-rings
    • -transfer & injection pumps
  • 10. Lubrication System
    • Change oil as recommended by Engine manufacturer
    • Use OEM recommended engine oil
    • API, CI rating
    • Regular oil analysis maintenance program
    • Inspect dipstick for biodiesel smell
  • 11. Lube Oil Contamination
    • Current ongoing research, SAE CI Engine Performance with Alternative Fuels, 2008
    • A concern of engine manufacturers.
    • Same mechanism for the oil dilution for heavier fractions of diesel fuel as for biodiesel.
    • Due to high boiling point of biodiesel, the fuel is slower to vaporize after injection into the cylinder.
    • Remaining compounds will be deposited on the cylinder wall where they can be pulled into the crankcase by the normal scraping action of the piston's oil control rings.
  • 12. Air Filtration
    • In a diesel engine, the amount of air remains constant while fuel amount is varied for speed and power control
    • Lean mixture at idle ( 80:1 )
    • Rich mixture under load (20:1)
    • Mass Air Flow (MAF) sensor
    • VW TDI EGR/ Intake design
    • Diesels thrive on air, lots of it, any air restriction will cause performance problems
  • 13. Starting & Charging System
    • Properly charged battery
    • Operating Starter or Alternator
    • Fouled glow plugs can cause hard starting
    • Glow plugs factory recalls
    • Dual Battery system
  • 14. Vacuum System
    • Older diesel maintenance issue
    • Leaky & Inoperative vacuum system can affect:
    • Brakes, Fuel shutoff, & transmissions
  • 15. Cooling System
    • Cooling system helps your engine warm up & cool down
    • Operating at optimum temperature helps
    • fuel economy & engine life
    • Cooling system hoses are not always biodiesel compatible, repair fuel leaks immediately to prevent damage to other systems
  • 16. Exhaust & Emissions Controls
    • EGR: exhaust gas recirculation
    • Catalytic converters
    • Diesel Particulate filters
    • Diesel Oxidation Catalyst
    • SCR: selective catalyst reduction (Urea)
    • Emissions regulations dictating changing engine and fuel injection design
  • 17. Are you Smoking?
    • Black smoke: injectors, air inlet restriction, engine timing, internal engine timing, injection pump failure
    • Blue Smoke: insufficient fuel, contaminated fuel,
    • High or low oil consumption, air in the fuel
    • White smoke: bad glow plugs, plugged return fuel line, insufficient fuel supply, low compression, air in fuel, injector or pump problem, engine timing
    • White smoke can be normal in cold weather before engine warms
  • 18. Miscellaneous
    • NOx Emissions see:
    • NREL’s “NOx solutions for Biodiesel”
    • Cold weather Operation
    • Timing belts & chains- replace at recommended intervals
    • Educate your fellow technicians
    • Bosch & Stanadyne & FIE/OEM statement
  • 19. OEM Warranty Statements and Biodiesel
    • All major U.S. OEMs support B5 and lower blends, provided they are made with biodiesel meeting ASTM D 6751, the existing ASTM International standard for pure biodiesel (B100)
    • Many are progressing toward support for B20due to recent approval of a new ASTM standard for B20 blends
    • Use of blends higher than B5 will not necessarily void existing warranties
    • For a complete listing of OEM position statements on biodiesel , visit:
      • http://www.biodiesel.org/resources/fuelfactsheets/standards_and_warranties.shtm
  • 20. NBB Resources
    • www.biodiesel.org
      • Technical Library
      • Biodiesel Bulletin
      • Educational Videos Available
      • Informational Resources
      • Technical Resources
      • On-line Database & Spec Sheets
    • www.BQ-9000.org
      • Biodiesel Quality Certification Program for Accredited Producers and Certified Marketers