USDA Biofuel Engines February 14, 2010 Retrofitting the Legacy Fleet.
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Transcript of USDA Biofuel Engines February 14, 2010 Retrofitting the Legacy Fleet.
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Alternate Fuel Dilemma
“How do you create an Alternate Fuel supply chain that can economically compete with petroleum products?”
Sufficient scale along the entire supply chain
Achieve reasonable economics during the transition
Must address these critical elements:
Collaborative effort along the entire supply chain
Fuel and vehicles need to be commercially available at a reasonable cost
There needs to be a retrofit solution for the existing supply chain
Vehicles that have multi-fuel capability provide significant advantages
Key Attributes for a Successful Transition:
CNG – high cost, poor availability, complex installation
LPG – high cost, poor availability, complex installation
FFV – no retrofit option
Hybrids – no retrofit option and high cost
Electric – not available today and very high cost forecast
None of the Existing Options Achieved all of these Components:
Market needed a legal flex fuel retrofit option
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Flex Fuel US was founded to address this gap and to create a bridge for the FFV/E85 strategy
Flex Fuel US LLC
Automotive background
Fuel injection & racing
Aftermarket & gray market conversions
Custom car builders
Emissions testing
Fuel production and distribution
Petroleum refining and marketing
Government and collaboration
Business consulting
Founders/Partners Founded in 2006 and first sale of shares
Utility Patent 7,349,790 awarded in 2008
First EPA certification awarded in 2008
Second round of funding in 2009
Featured in Business Week as one of “America’s Most Promising Start-ups”
Four additional EPA certifications in 2010
100th vehicle converted in 2010
1 million total miles driven with conversion and on E85
Awarded GSA approved supplier
Converted Dodge Charger Hemi with over 80,000 miles in E85 operation
Key Milestones
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Our goal was to create a “street legal” and low cost flex fuel conversion technology but there were some significant challenges
Challenges to Address
Clean Air Act requires all vehicles to have fully functional OBD, tailpipe and evaporative emission systems that have not been altered or modified from their original calibration.
Federal/State Rules:
E85 fuel has less BTU content and introduces a significantly higher level of oxygen into the engine than gasoline.
Different fuel characteristics:
Any modifications to the vehicle requires that a certificate of compliance from the EPA be obtained for a vehicle family including:
– Meeting new vehicle tail pipe emissions requires passing a series of emission tests as prescribed by the EPA.
– Demonstrate that you have not interfered with any of the vehicle’s control systems and not altered or modified the OBD-II system.
– Prove that the technology and use of E85 doesn’t impact the durability of the vehicle which requires certifying the system to operate over a vehicle’s normal life cycle of ten years or 120K miles.
The conversion would have to provide a way to address these requirements for a range of fuel characteristics without altering the original manufactures equipment.
Implications:
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A supplemental fuel system was the only approach that would address the challenges and deliver our goal
Design Approach
Adding fuel delivery over and above the factory settings would be required in certain circumstances
The fuel characteristics could vary from 0% to 85% ethanol
No modifications to the OEM injector pulse signal
No interference with or manipulation of OEM ECU or other instrument signals
Design ConsiderationsThe conversion system would have to be able to increase fuel delivery without using the OEM injectors and therefore the only way to accomplish this would be:
– throttle-body style supplemental fuel injection system totally independent of the factory fuel management system
– An independent fuel management system that monitors engine functions and prescribes a precise amount of fuel for the new injector to deliver
Supplemental Fuel System
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The independent fuel management system provides sufficient control capability to enable these vehicles to pass stringent EPA testing
Fuel Management System
Engine speed
Throttle position
Ethanol content
O2 sensors
Air temperature
Flex Fuel USProcessor
Injector Pulse
Engine speed, throttle value positions and O2 sensor signals are borrowed from OEM equipment Ethanol content and air temperature is provided from sensors we add to the vehicle The processor is a race proven proprietary hi-speed controller processing information at speeds up to
fifty times faster than the factory control module.
– Algorithm based strategy with configurable Load & RPM axes to enable optimization in desired operating range
– True Speed-Density algorithm allows for easier tuning
– Integrated dashboard logic provides real-time critical system and engine functions All electrical connections run through a common harness equipped with OE style metra-pack
connectors. The harness is a universal application and can be adapted to fit most any application.
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The independent fuel management system provides sufficient control capability to enable these vehicle to pass stringent EPA testing
Fuel Management SystemEngine speed
Throttle position
Ethanol content
O2 sensors
Air temperature
Injector Pulse
The processor contains multiple mapping strategies specifically tailored for each engine family. The maps provide an integrated logic circuit to control supplemental fuel delivery throughout the vehicle operating range.
Flex Fuel USProcessor
Base fuel map
Throttle position transient fuel tabledTPS table
Acceleration enrichment tableCold cranking fuel table
Run time correction table
Base fuel map built on Alpha-N speed throttle angle/engine speed algorithm Alcohol table that receives a signal from the alcohol sensor and increases or decreases the fuel map by a % based
on the alcohol content of the fuel. Throttle position transient fuel tables dTPS table provides an additional asynchronous pulse to increase fuel delivery acceleration Acceleration Enrichment position correction, reduces or increase the asynchronous pulse based on throttle speedCold start and cold idle strategy Ambient air temperature sensor Cold cranking fuel table adds additional fuel during the crank cycle below 400 rpm based on ambient air
temperature Run time correction provides additional fuelling during cold idle based on running time and ambient air temperature
Fuel ethanol content table
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Supplemental fuel is added after the throttle body
Supplemental Injection SystemThrottle body style fuel injection utilizes high performance Bosch 65lb. Injector:
• Universal style can be adapted to most engine configurations
• Injector modified and custom machined to our specification
• Low impedance quick response peak & hold design
• Improved drivability at idle and low speed operation
Precision machined injector plate application specific.
• Injector plate machined to produce optimal air/fuel atomization.
• Throttle bore matched for maximum air flow
Factory fuel line
Fac
tory
fuel
rai
l
Air intake
ThrottleBodyValve
Intakemanifold
LegendFactory equipmentProvided by Flex Fuel US
Industry standard ethanol sensor:
Fuel lines are equipped with OE style quick-disconnect fittings
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Proven Track Record of Performance
The technology has been robustly tested across a wide range of conditions and with key stakeholders
Independent Testing
EPA NVFEL Lab, Ann Arbor, MI
Roush Labs, Livonia, MI.
Oak Ridge National Labs, TN.
Mercedes Labs, Ann Arbor, MI.
Test Vehicles
2006 Charger with 80k miles of testing
2006 Grand Marquis with 50k miles
2006 F-150 with 10k miles
Engineering Reviews
Reviewed to ensure the system meets or exceeds engineering safety standards for fuel handling, component durability, and ethanol compatibility
Quality Assurance Testing
Demonstration Pilots
City of Chicago
State of Iowa, Iowa National Guard
On Road Fleet Testing
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Tailpipe Performance
Our test results have proven to improve tailpipe emissions for used vehicles using E85 fuel
This table shows the FTP test results for a 2007 Chrysler 300 that had been driven 21,000 miles when it was tested at Roush Labs. The data is from official certification testing without DF corrections.
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Durability Testing
We completed a comprehensive review of the vehicle materials to ensure they were compatible or did not significant reduce components life
Approach
• Engineering Reviews: Utilized retired Detroit fuel systems supervising engineer to review vehicles to be converted
• Destructive testing of components: Key components were dismantled and tested for compatibility with ethanol
• Parts comparison: We compared the parts in a FFV with a non-FFV to understand the difference
• Literature search: We reviewed the significant body of research to identify problem areas
• Field testing: Purchased non-FFV vehicles, converted them and placed into daily service
Key Findings
• Most parts in the fuel and evaporative system in the vehicles we reviewed are compatible with high concentrations of ethanol
• Parts that were not specifically designed for E85 service performed well and achieved end of life requirements for the new service
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ODB II & Evaporative Testing
The design approach does not alter or modify the vehicles original factory power train control system in any way, and the factory control system operates as originally intended
The On Board Diagnostic System (OBD-II) regularly performs circuit integrity loops to insure that the engine and emission systems are functioning properly .
• EPA requires that the OBD system be fully functional at all times and that a conversion system not alter or modify the original system.• In order to prove to EPA that the OBD system is fully operational we were required to run a battery of destructive tests on the OBD system to demonstrate that an MIL would illuminate within an FTP test cycle when using failed components and/or simulators for the following:
• Catalyst Monitor• O2 sensor• Rich / Lean misfire• Fuel system• EGR
The evaporative emissions system is also tested as part of the testing process by loading the charcoal canister with butane to its maximum capacity, and than running an FTP to record how much butane the system purges over the FTP cycle.
• The canister is required to purge a minimum amount of butane based on the requirements of a two-day diurnal shed test• The evaporative system must not setoff an MIL during canister purging.
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Converted Vehicle Performance
Our technology coupled with the characteristics of E85 provides improved performance for the converted vehicles versus gasoline operation
When a converted vehicle is operating with E85 fuel, several performance improvements have been noted in literature and in our testing:
Increased horsepower and torque by 8 to 12% because:
• E85 has 105 octane and late model electronic spark controlled vehicles can take advantage of improved spark timing
• The placement of the supplemental fuel increases volumetric efficiency and lowers pumping losses by cooling the air intake
Cleaner Combustion zone with less carbon build-up and improved oil life because:
• Low carbon content• Lower combustion temperature
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Converted Vehicle Performance
While the use of E85 reduces fuel economy, our experience has been better than the theoretical BTU decline
Although the technology wasn’t developed with a goal to minimize fuel economy loss, our experience has been much better than the theoretical BTU difference with losses of just 10 to 20%. We believe the improvement is due to the following:
• E85 has 105 octane and most vehicles can take advantage by advancing the timing• The placement of the supplemental fuel also lowers pumping losses by cooling the air intake
Data that supports this claim
16.8621.8814.19E85 - 105 Octane
8.80%18.5124.4515.45EEE - Indolene 93 Octane
2006 Dodge Charger 5.7L
14.2518.5111.99E85 - 105 Octane
10.10%16.0120.8313.46EEE - Indolene 93 Octane
2006 Ford F-150 5.4L
20.2826.8416.93E85 - 105 Octane
9.01%22.3129.5518.58EEE - Indolene 93 Octane
2006 Linc. Town Car 4.6L
VEHICLES
Fuel Economy Loss %
Average Fuel
Economy
Highway Mileage
City Mileage
16.8621.8814.19E85 - 105 Octane
8.80%18.5124.4515.45EEE - Indolene 93 Octane
2006 Dodge Charger 5.7L
14.2518.5111.99E85 - 105 Octane
10.10%16.0120.8313.46EEE - Indolene 93 Octane
2006 Ford F-150 5.4L
20.2826.8416.93E85 - 105 Octane
9.01%22.3129.5518.58EEE - Indolene 93 Octane
2006 Linc. Town Car 4.6L
VEHICLES
Fuel Economy Loss %
Average Fuel
Economy
Highway Mileage
City Mileage
Fuel Economy Comparison using Federal EPA Fuel Economy Testing Standard FTP 75
City of Chicago Police Car Conversion Results
• 25 Police vehicles were converted• Vehicles average idle times of approximately
40%• Fuel loss on identical vehicles, gasoline to
E85 have averaged 18%
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Moving Forward
The technology is viable now and adds a critical strategic component to the ethanol alternate fuel strategy
• Proven track record of performance
• It’s low cost and easy to install
• Simple to operate
• Maintains the factory warranty
• Product has a two year warranty
There’s a high quality, street legal, commercially available FFV option in the market today
• Project approved with State of Illinois
• Scale up of a program with National Guard
The technology is building credibility in the marketplace and more projects are in the works
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Working in Collaboration
The successful Alternate Fuel strategy will require collaboration across the entire supply chain and a strategy that achieves good economic returns
• Think big, create a National Program. Collaboration is needed across the entire Supply chain. Government (DOE, EPA, USDA, Commerce), Automotive Manufacturers and Dealers, Fuel Suppliers, Distributors, Retailers, Fleet managers and Automotive Technology colleges
• Make Retrofit solutions part of the plan. The existing legacy fleet is the largest opportunity to generate demand. With over 100 million vehicles capable of conversion, this opportunity is the fastest way to achieve scale in the near term.
• Re-align and enhance policies already in place. Fundamentally, policies, incentives, and grants need to focus on creating acceptable economic returns. At the Federal level, this would imply some policy changes and several options are listed below to achieve this vision:
• Create competition in the Market. The fuel (E85 or higher blends of ethanol) needs to be priced competitively and consistently to build confidence in the marketplace
• Think National, start local – “you can’t eat an elephant in one bite”.
Experience to date suggests several principles that should be adopted in the plans moving forward: