Gasoline engines use throttle valves to control the intake air flow and thereby power and torque output. Throttle valves in today's motorcycles are mechanical; they are linked to the accelerator hand grip by a throttle cable. In cars, this type of system has mostly been replaced by electronic throttle control (ETC). An electronic throttle device is controlled by an electronic control unit (ECU) based on the input from a sensor in the accelerator pedal. In the motorcycle market, the first ETC systems that have appeared on the market have been intermediate solutions with remaining mechanical links. Detailing benefits of an ETC system without these mechanics, the paper proposes a full ETC system without mechanical links for motorcycles. The following points suggest use of ETC in motorcycles: - Omission of throttle cable, - better driveability , - emission control by catalyst heating (ignition retardation to increase exhaust gas temperature) without driveability compromise, - feasibility of engine torque and power limitation, - possibility to influence engine characteristics, - power optimization of engines by increase of throttle bore without compromising driveability at small throttle angles, - possibility of the realization of new functions, - omission of idle speed actuator. Components required for the realization of an ETC system are an electronic throttle device or a throttle actuator, an accelerator hand grip sensor and an ECU. A study has been conducted on a mass production on-road sport motorcycle in order to prove feasibility of an ETC system. Exemplary evaluation results show improvements in emission technology (catalyst heating) and driveability. The paper points out that a task remaining is the definition of an industry wide motorcycle ETC safety concept for detection of malfunction and proper failure reaction.


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    Title :

    Electronic throttle control for motorcycles


    Contributors:


    Publication date :

    2007


    Size :

    7 Seiten, 7 Bilder, 3 Tabellen, 5 Quellen


    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English




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