Novel Mechanisms to Improve the Start Quality of Automotive Engines

  • Madhusudan RaghavanEmail author
Conference paper
Part of the Mechanisms and Machine Science book series (Mechan. Machine Science, volume 73)


Start-stop technology is an affordable pathway to reduce fuel con-sumption and emissions in automotive propulsion systems. We present two novel mechatronic starters. The first concept uses a two-speed starting device to crank the engine to a higher rpm prior to ignition. It is comprised of an arrangement of gears and clutches that changes the overall cranking gear ratio during the course of the start event. This allows the engine to reach nearly twice its rated pre-igni-tion rpm, making for ultra-smooth starts. The second concept is a mechatronic starter that can switch between geared and belted operation. This integrated starter with selectable geared and belted connections to the crankshaft enables a very fast, smooth start in belt-mode compared to a conventional 12V starter.


engine hybrid cranking start/stop 


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  1. 1.
    Lutsey, N., and Sperling, D., “Transportation and Greenhouse Gas Mitigation,” UC Davis Technical Report,
  2. 2.
    Lee, S., Cherry, J., Safoutin, M., and McDonald, J., “Modeling and Validation of 12V Lead-Acid Battery for Stop-Start Technology,” SAE Technical Paper 2017-01-1211, 2017,
  3. 3.
    Ventura, L., Malicheski, T., De Oliveira, R., Junge, T., and Da Silva, F., “Start/Stop Retrofit for off-highway vehicles,” SAE 2016-36-0266.Google Scholar
  4. 4.
    Guo, R., Mi, Y., and Cao, C., “Subjective and Objective Evaluation of APU Start-Stop NVH for a Range-Extended Electric Vehicle,” SAE Technical Paper 2015-01-0047, 2015,
  5. 5.
    Heinzmann, B., Scholz, S., R, P., and Anantha, P., “Start/Stop Strategies for Two-Wheelers in the Emerging Markets,” SAE Int. J. Passeng. Cars - Mech. Syst. 6(3):1595-1604, 2013,
  6. 6.
    Chen, H., Zuo, C. and Yuan, Y., “Control Strategy Research of Engine Smart Start/Stop System for a Micro Car,” SAE 2013-01-0585.Google Scholar
  7. 7.
    Whitall, I., “Off-Cycle Fuel Consumption Evaluation of Stop-Start Systems,” SAE 2012-01-1601.Google Scholar
  8. 8.
    Fulks, G., Roth, G. and Fedewa, A., “High Performance Stop-Start System with 14 Volt Belt Alternator Starter,” SAE Int. J. Engines 5(3):2012,
  9. 9.
    Mueller, N., Strauss, S., Tumback, S., Goh, G., and Christ, A., “Next Generation Engine Start/Stop Systems: Free-Wheeling,” SAE 2011-01-0712.Google Scholar
  10. 10.
    Bishop, J., Nedungadi, A., Ostrowski, G., Surampudi, B., Armiroli, P., and Taspinar, E., “An Engine Start/Stop System for Improved Fuel Economy,” SAE 2007-01-1777.Google Scholar
  11. 11.
    Beer, J., and Teulings, W., “Optimized Start Strategy for Stop/Start Operation of a Micro-Hybrid Vehicle,” SAE 2007-01-0298.Google Scholar
  12. 12.
    Raghavan, M., and Balhoff, A., “Electrical Torque Addition Mechanism for Engines with High Levels of EGR,” EuCoMeS 2018: Proceedings of the 7th European Conference on Mechanism Science, edited by Burkhard Corves, Philippe Wenger, Mathias Hüsing.Google Scholar
  13. 13.
    Raghavan, M., “Mild Electrification Across a Spectrum of Vehicle Types,” FISITA 2018, Paper No. F2018-EHV-009.Google Scholar
  14. 14.
    Raghavan, M., Bucknor, N., and Donikian, V., “The Kinematics and Dynamics of Engine Start Systems,” IFToMM Asian MMS Conference, Bangalore, Dec 18-19, 2018.Google Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.General Motors R&DWarrenUSA

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