Transcript Issues with Ethanol as an Additive in Non

Issues with Ethanol as an Additive in
Non- Road Motor Fuel
IBEX
Presented By: John McKnight, NMMA
Ethanol GASOLINE
What are the effects of ethanol
• Alcohol is a solvent
• Effective cleaning agent
It will clean the boat fuel tank and the marina’ s fuel tank.
• Alcohol absorbs water
It will dry out materials if they are not designed for ethanol
(gaskets / hoses) and it attracts water into the fuel
• Alcohol separates from fuel more readily than MTBE or toluene
When it separates from solution it will evaporate more
readily and that will lower the octane level in the fuel.
Limit for Acceptable
Operation
Limit for Emission
Compliance
Acceptable
Operating Range
Operation
on E20
Gasoline
Lean
Operation on
E10 Gasoline
Air:Fuel Ratio
Operation on
Neat Gasoline
Rich
E-20’s Impact on Current, Exhaust- Emission
Compliant Small Engines
• Exhaust temperatures up 100°F
• Peak cylinder pressures higher
• Combustion deposits
• Cylinder head gasket burned & failed
• Exhaust valve burned
• Cylinder bore scored
– 25 hours light duty emissions testing
– Lost cylinder compression
– Lost 20% power
E-20 Implications on Engine Durability
Cylinder
head
gasket
burned
Lost seal
Exhaust
leak out
E-20 Implications on Engine Durability
Cylinder
Bore
scoring
Deposits
Engine Durability Implications with E-20
1
1
2
3
4
5
6
7
8
Head bolts discolored due to heat and
carbon build up from exhaust gas
blowing past bolt.
EPA Waiver Criteria
• Manufacturer must demonstrate that E20:
– Will not cause or contribute to the failure of any vehicle to
comply with emission standards over it useful life.
– Testing must be completed to access the impact on
Tailpipe emissions
Evaporative emissions
Materials compatibility
Drivability
– Registration of a fuel additive also requires testing to
characterize compounds for potential health effects
NMMA Strategy
• Continue to work with the industry coalition;
• Collect data specific to the impact of E-20 on recreational marine
engines and fuel systems;
• Build a technical case focusing on the waiver criteria against
incremental increases in ethanol content;
• With solid documentation present this information to the Minnesota
representatives, both state and federal;
• Post ethanol information on the NMMA website and make this
information available to the public and press;
• http://www.nmma.org/government/environmental/
• Develop an NMMA Position that considers the potential national
trend towards increase use of reformulated fuels.