Dr. Nagesh S. Mavinahally
Northridge, CA 91325, USA
(864) 225-5112
email:




Education Professional Experience Skills Awards and Recognition

    Accomplishments


    Education

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    Ph.D. Mechanical Engineering, Indian Institute of Technology, Madras, (1992)

    M.S., Mech. Engrg. Mangalore University, India (1985)

    B. S., Mech. Engrg. Mysore University, India (1982)

    Environmental Engineering (continuing education), University of New Orleans(1994)


    Skills, Accomplishments, Hobbies

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    • Built a prototype variable volume/timing stratified charge engine – patent pending
    • Built a camshaft-less valve train for four-stroke engines – patent pending
    • Building an extended expansion engine for small engine application – patent pending
    • Tinkering with small 2 and 4-stroke engines
    • Built a small Bio-gas carburettor for a single cylinder agricultural engine
    • Built and demonstrated air-head scavening system (1991), similar to Redmax engine
    • Patents (2) and Publications (18)- obtained two US patents on two-stroke engines in 1995
    • Many Invention disclosures. Five patents pending
    • Extensive hands-on experience in C.I., S.I., Two and Four-stroke engines
    • Develop low emission two-stroke engines – Meet EPA and CARB levels
    • Design, make prototype parts, fabricate, and test two-stroke engines
    • Project coordination and customer support
    • Analysis of engine duty cycle
    • Vehicle mission simulation for fuel consumption and emission
    • Cylinder Pressure data acquisition, analysis, interpretation and report writing
    • Analysis of engine performance - experimental and cycle simulation
    • Design of engine test matrix and combustion recipe for performance and emissions
    • Experience in gaseous-fueled S.I. engines (LPG, CNG and biogas)
    • Knowledge in calibration of diesel fuel injection system and engine test cell instruments
    • Great team player

    Professional Expereince

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    Nov. 2010 - Present MavinTech USA, Los Angeles, CA

    Owner. Consulting services for small engine development

    Nov. 2009 - 2010 LEHR, Los Angeles, CA

    VP of Engine Technologies and Product Development

    Aug. 2008 – Nov. 2009 Cummins Inc, Columbus, IN

    Director– Advanced Product Development, Natural Gas HHP Engines

     Responsible for the development of Natural Gas HHP Generator. Managed cross functional design teams across the globe. Responsible for the architecture of the advanced HHP Natural Gas engine. Coordinated design and verification test plans for the engine and application. Trained in Design For Six Sigma.

    Feb. 2002 – Aug. 2008 Homelite Consumer Products, Anderson, SC

    Director– Advanced Engine Technologies/Development

    Responsible for design and development of low emission engines. Successfully developed the lightest four-stroke trimmer engine from a clean sheet of paper to pre-production in 13 months.

    1997 – 2002 Cummins Engine Company, Columbus, IN

    Technical Specialist– Performance Development

    Responsibilities and skills: Performance development, vehicle mission simulation, engine duty cycle, engine cycle simulation, design of engine test matrix, data quality assurance, data acquisition, analysis and interpretation, technical reports, duty cycle emission prediction, evaluation and integration of advanced technologies, coordinate and support internal & external projects.

    1994-Sept. 1997 Adiabatics, Inc., Columbus, Indiana

    Technical Specialist/Program Manager
    • Successfully managed Phase I and II of advanced military diesel engine projects. The project involved cycle analysis, performance prediction, and recommendation of hardware, design of test matrix, supervision, and testing of advanced military diesel engine - on Caterpillar 3116
    • Built and programmed data acquisition system
    • Responsible for Fuel setting - rating, synchronization, and timing of unit injector
    • Designed a prototype hydraulic variable valve timing system
    • Incorporate two-stage supercharging into a multi-cylinder Miller cycle diesel engine
    • Modified a distributor fuel injection system for high speed single cylinder two-stroke engine
    • Designed, fabricated, and tested ‘thermal ignition system’ for two stroke diesel engine

    1992-1994 University of New Orleans, New Orleans

    Graduate Research Associate and Post-Doctoral Research Fellow, Urban Waste Management and Research Center.
    • Built a Database to estimate the environmental impact of air pollution from two-stroke engines in the USA and developing countries
    • Literature survey on technologies to reduce emissions
    • Taught undergraduate course "Introduction to material science"
    • Many invention disclosures – Four patents issued, currently pursuing six

    1991-1992 Malnad College of Engineering, Hassan, India, Instructor, Department of Automobile Engineering
    • Taught undergraduate automotive technology courses; fundamentals of I.C. engines, carburetor, fuel injection and ignition systems. I.C. engines laboratory courses - calibration of fuel injection system (using Bosch bench), engine fault diagnosing and tune up, engine rebuilding. Supervised student projects, grading, and counseling
    • Commissioned engine test beds, setup instrumentation, and conducted tests on multi-cylinder automotive and stationary engines
    • Managed the State sponsored project on Air-head scavenging system for two-stroke engine, 1992
    • Two weeks training in diesel fuel injection system at MICO (a division of BOSCH)

    1986-1991 Indian Institute of Technology, Madras, India, Research Scholar
    • Extensive investigation on "Extended expansion (Miller cycle) concept applied to a single cylinder S.I. Engine"
    • Designed, fabricated, and tested a cost-effective variable valve timing system (phase cam) for a single cylinder C.I. Engine
    • Helped graduate and under graduate student projects
    • Designed, fabricated and tested torch ignition to enhance lean limit operation in S.I. engine
    • Extensive literature search on VVT system and Stratified two-stroke engines - has reviewed patents starting late 1890's to current


    Awards and Recognitions Top

    Best Project of the Year Award, Govt. of India (1992) - "Air-Head Scavenging in Two-Stroke Engines".

    Certificate of Merit, Indian Institution of Engineers (1995) - "Future Two-Stroke Engines for Automotive Application".


    Personal

    Hobbies include – Innovation, building small engines, photography, reading, and traveling.


    Short list of Publications

    1. Nagesh S. Mavinahally, An Historical Overview of Stratified Scavenged Two-stroke engines - 1901 through 2003, SETC 2004-32-0008, Graz, Austria
    2. Nagesh, S.M., 'Experimental investigation on extended expansion engine', SAE paper No. 920452.

    3. Nagesh, S. M., Donald E. Barbe', K.V. Gopalakrishnan, B. Nagalingam, and A. Ramesh, 'Emission control technique for two stroke S.I. Engines by using extra non-return valves on transfer passages', Southern states annual environmental conference, Mississippi, Oct 26-28, 1993.
      4.

    4. Nagesh, S. M., Dennis N. Assanis, K. V. Gopalakrishnan, and K. R. Govindamallan 'Torch ignition - ideal for lean burn premixed-charge engines', ASME, Jan. 23-26, 1994, New Orleans, U.S.A.

    5. Nagesh S. Mavinahally and Donald E. Barbe', 'Air pollution from motor vehicles - What you can do', Urban Waste Issues, University of New Orleans, Vol. 3, No.1, Winter 1994.

    6. Nagesh S. Mavinahally and Donald E. Barbe', 'Assessing the effect on air quality due to improvement in two-stroke engines', Research report No. 92-12, Urban Waste Management & Research Center, New Orleans, LA, 53 pp., 1992.

    7. Mavinahally, N.S., Kamo, Roy., ‘Port-Controlled Selective Exhaust Gas Recirculation for Two-Stroke Engines - a Concept’, oral presentation at SAE 1997, Detroit.

    8. Mavinahally, N.S., Kamo, R., Bryzik, W., Ried, M., and Wong, V., ‘Insulated Miller Cycle Diesel Engine’, SAE 961050, 1996.

    9. Mavinahally, N.S., Kamo Roy, and Ganesan V., 'Two-stroke engine design with selective exhaust gas recirculation - a concept' Small Engine Technology Conference, Japan, JSAE 9734511, 1997.

    10. Kamo, R., Mavinahally, N.S., Kamo, L., Bryzik, W., and Ried, M., ‘Emission Characteristics of a Turbocharged Multi-cylinder Miller Cycle Diesel Engine, DOE - Diesel Engine Emissions-Workshop, July 30, 1997, San Diego, CA.

    Accomplishments

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    Patents: Two US patents - 1) U.S. Patent No. 5,379,732, Jan., 1995, "Continuously variable scavenging passage for two-stroke engines" and 2) U.S. Patent No. 5,425,346, June 1995, "Performance improvement design for two-stroke engines", pertain to design of induction system in two-stroke engines. The designs pertain to variable transfer passage volume, variable inlet port timing, and selective exhaust gas re-circulation systems. In the inlet port timing system, both the opening and/or closing time can be can be continuously varied for optimum breathing efficiency at all operating speeds. In the second patent the exhaust gas rich in short circuited fresh charge is selectively re-circulated into the cylinder for combustion in the following cycle. Varying the transfer passage volume can vary the volume of re-circulated exhaust gas or air in the case of air-head scavenging depending on engine operating condition.

    Invention Disclosures: 1) Many stratified Scavenging Systems for Two-Stroke Engines 2) Hydro-Mechanical Variable Valve Timing System 3), Electro-Mechanical Variable Valve Timing System, 4) EGR system, 5) Continuously variable length intake runner, 6) Extended expansion engine, and 7) Multipurpose four-stroke engine.