The effect of valve control on a motor vehicle engine performance

Ishmael Zibani, Joseph Chuma, Rapelang R. Marumo

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    A camshaft controlled car engine poppet valve system has been in use for many years since the industrial revolution. The crankshaft synchronously drives the camshaft using a timing belt. The camshaft in turn opens and closes the poppet valves during the Otto cycle. The main disadvantage of this system is the high possibility of damage to the valves, pistons or perhaps the engine itself in the event of a timing belt failure. Another drawback is the labour-intensive job of replacing a timing belt. A number of research activities have gone into computer controlled camshaft to make the system more reliable and predictable. But as long as the valve and piston paths cross, a collision is invertible at some point. The belt requires regular replacement. An electronically controlled rotary valve (ecrv) has been proposed. Its motion is perpendicular to the piston, averting any possibility of a collision. In this study, timing parameters of the poppet valve system are discussed and compared to those of the ecrv. Furthermore, the operational difference between the two valve types is extensively covered, clearly demonstrating performacnce advantages of the ecrv. At the time of writing this script, a prototype engine was being implemented.

    Original languageEnglish
    Title of host publicationProceedings of the IASTED African Conference on Modelling and Simulation, AfricaMS 2012
    Pages140-147
    Number of pages8
    DOIs
    Publication statusPublished - 2012
    Event4th IASTED African Conference on Modelling and Simulation, AfricaMS 2012 - Gaborone, Botswana
    Duration: Sep 3 2012Sep 5 2012

    Other

    Other4th IASTED African Conference on Modelling and Simulation, AfricaMS 2012
    CountryBotswana
    CityGaborone
    Period9/3/129/5/12

    Fingerprint

    Camshafts
    Timing
    Engine
    Pistons
    Engines
    Otto cycle
    Collision
    Crankshafts
    Invertible
    Perpendicular
    Replacement
    Railroad cars
    Damage
    Personnel
    Prototype
    Cycle
    Path
    Motion

    All Science Journal Classification (ASJC) codes

    • Modelling and Simulation

    Cite this

    Zibani, I., Chuma, J., & Marumo, R. R. (2012). The effect of valve control on a motor vehicle engine performance. In Proceedings of the IASTED African Conference on Modelling and Simulation, AfricaMS 2012 (pp. 140-147) https://doi.org/10.2316/P.2012.761-019
    Zibani, Ishmael ; Chuma, Joseph ; Marumo, Rapelang R. / The effect of valve control on a motor vehicle engine performance. Proceedings of the IASTED African Conference on Modelling and Simulation, AfricaMS 2012. 2012. pp. 140-147
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    Zibani, I, Chuma, J & Marumo, RR 2012, The effect of valve control on a motor vehicle engine performance. in Proceedings of the IASTED African Conference on Modelling and Simulation, AfricaMS 2012. pp. 140-147, 4th IASTED African Conference on Modelling and Simulation, AfricaMS 2012, Gaborone, Botswana, 9/3/12. https://doi.org/10.2316/P.2012.761-019

    The effect of valve control on a motor vehicle engine performance. / Zibani, Ishmael; Chuma, Joseph; Marumo, Rapelang R.

    Proceedings of the IASTED African Conference on Modelling and Simulation, AfricaMS 2012. 2012. p. 140-147.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

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    Zibani I, Chuma J, Marumo RR. The effect of valve control on a motor vehicle engine performance. In Proceedings of the IASTED African Conference on Modelling and Simulation, AfricaMS 2012. 2012. p. 140-147 https://doi.org/10.2316/P.2012.761-019