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 Expert  727332

Expert in Evaporative and Refueling Emission Control

Available for your Consulting and Expert Witness Needs

Michigan (MI)
Education Work History Career AccomplishmentsPublicationsConsulting Services Expert Witness Market Research

Summary of Expertise: Listed with other top experts in: 
Expert's Firm, was formed in 2009 after Expert's retirement from General Motors R&D Center with 30 years of experience in fuels and fuel vapor emission control research and development. Expert's firm provides engineering and consulting services in the area of evaporative fuel vapor emission control. Expert has extensive experience in finding solutions to difficult evaporative emission control problems which involved developing mathematical models to predict evaporative (diurnal, hot-soak, running loss, and refueling) fuel vapor generation from fuel tanks, fuel vapor storage in activated carbon canister, canister purging, vapor redistribution, canister back-purge, and permeation losses. Another unique modeling skill of Expert is the complex mathematical prediction of vapor pressures and emissions from gasolines containing various oxygenates (ethanol, methanol, butanol, MTBE, ETBE, etc.). Skills that nobody else in the industry possess except Expert: 1. Complex non-ideal solution (ethanol/gasoline) evaporative and refueling vapor generation model 2. Vapor generation models for predicting: a. Diurnal and running loss vapor generation as a function of ethanol concentration, fuel vapor pressure, ambient temperature, and altitude b. Refueling vapor generation as a function tank fuel RVP, dispensed fuel RVP, tank temperature, dispensed fuel temperature, air entrainment (liquid seal vs. mechanical seal, and fill type (bottom fill vs. top fill) 3. Canister models based on activated carbon adsorption isotherm and mass/energy balance for predicting: a. Canister loading (adsorption) breakthrough or bleed emissions b. Canister purging (desorption) as a function of purge air volume and temperature c. Canister back-purge (passive purge), especially in multiple diurnals d. Vapor redistribution during soaks and its effect on bleed emissions e. EPA working capacity f. Slow loading diurnal vapor storage capacity (for EPA and CARB 3-day diurnals) g. Rapid loading refuel vapor storage capacity (EPA ORVR test)

automotive fuel


emission control


evaporative emission product


fugitive emission product

Show Secondary and Basic Areas of Expertise
Expert may consult nationally and internationally, and is also local to the following cities: Detroit, Michigan;  Warren, Michigan;  Flint, Michigan;  Sterling Heights, Michigan;  Lansing, Michigan;  Ann Arbor, Michigan;  Livonia, Michigan;  Dearborn, Michigan;  Westland, Michigan;  and Toledo, Ohio.

Often requested
with this expert:

Automotive Emission/ Fuel Economy
EPA & CARB Mobile Emissions Regulations for Fleet...
Automotive and Small Engines
Energy, Gas and Diesel Engine Generators, Combined Heat and...

Year   Degree   Subject   Institution  
1979   PhD   Chemical Engineering   The University of Michigan, Ann Anbor  
1976   MS   Chemical Engineering   University of California, Los Angeles  
1974   BS   Chemical Engineering   Osmania University  

Work History:
Years   Employer   Department   Title   Responsibilities

2009 to


(Undisclosed Consulting Company)





Consulting firm

1979 to 2009


General Motors Research and Development Center


Chemical and Environmental Laboratory


GM Technical Fellow


Research and development in evaporative and refueling emission control - mathematical modeling and simulation software development, problem solving, new concept development to solve complex automotive evaporative and refueling emission control problems or for reducing the cost and complexity of the systems

Career Accomplishments:

Member Society of Automotive Engineers


P.E. in State of Michigan


2002 Boss Kettering Award for Engine off Natural Vacuum Fuel System Leak Detection.

1995 Boss Kettering Award for Innovations in Fuel Systems.

2002 Charles L. McCuen Special Achievement Award for Evaporative Emission Control System Leak Detection.

1993 Charles L. McCuen Special Achievement Award for Innovative Components for Reduced Vehicle Evaporative Emissions.

1989 Charles L. McCuen Special Achievement Award for EVAP-PC Model for Predicting Vehicle Vapor Emissions.

Publications and Patents Summary

26 US patents and several defensive publications; 5 pending

11 SAE Papers

2 papers in international journals

6 graduate studies/research publications in international journals

Consulting Services:
Selected Consulting Examples:
  • Just retired from GM R&D Center and started a consulting company called Expert's Firm
Recent Client Requests:
  • Expert in production road vehicle fueling evaporative system specification and sign-off.
Click the green button above to contact Expert for a free initial screening call regarding your expert consulting needs.  Expert is available for consulting to corporate, legal and government clients.  Remember, your initial screening call to speak with Expert is free.

Expert Witness:
Recent Litigation Client Requests:
  • Ethanol production expert for consulting on separation of liquids from thin stillage.
Click the green button above to contact Expert for a free initial screening call regarding expert testimony, litigation consulting and support, forensic services, or any related expert witness services.  A few litigation needs include product liability, personal injury, economic loss, intellectual property (patent, trademark, trade secret, copyright), and insurance matters.  Remember, your initial screening call to speak with Expert is free.

International Experience:
Years   Country / Region   Summary
1995 to 2009   Europe   Helped GM engineers in Europe in the design of evaporative and refueling emission control systems
2000 to 2009   South Korea   Helped GM engineers in S. Korea in the design of evaporative and refueling emission control systems

Market Research:
Automotive Evaporative and Refueling Emission Control

Click the green button above to contact Expert for a free initial screening call regarding your marketing research, industry research, and company research needs.  For research needs involving multiple experts or secondary research, a Research Director can be assigned to coordinate the work into a custom report for you as a potentially quicker and more cost effective alternative to doing this work yourself or hiring a boutique consultancy.  Remember, your initial screening call to speak with Expert is free.

Additional Skills and Services:

Developed and taught 2-day Society of Automotive Engineers professional development seminar. Title: Evaporative and Refueling Emission Control.

Taught a two-hour class to GM engineers on evaporative and refueling emission control


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