Robust Control of a Four Stroke Si Engine

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    ROBUST CONTROL OF A FOUR

    STROKE SI ENGINE

    GUIDED BY Prof.T.VIVEK BY

    R.ARJUN (08G03) A.BINIL (08G15)

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    P ROBLEM DESCRI P TION

    y In conventional engine control systems, two parallel

    control loops are used to control speed and air fuel ratio.y But the working of one loop affects the other.y To address this problem a Robust Multivariable control

    system is designed to control both engine speed and air

    fuel ratio.y The engine input variables controlled by controller are

    throttle position, fuel injection and spark advance.

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    CONCE P T OF ROBUST CONTROLLERy The disadvantages in the present controllers are that control

    parameters are difficult to tune for good performance and theylack robustness.

    y Robustness of a controller is its property maintain stability andensure performance even though the parameters of the systemvary.

    y Robust Stability: The plant should preserve stability in the presence of various classes of uncertainties, load disturbancesand noises.

    y Robust Performance: The plant should be capable of trackingall reference signals belonging to a class of signals withoutexcessive error, despite various uncertainties.

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    ENGINE IDENTIFICATIONy TVS Apache RTR 160 Fi is chosen as the ideal engine for

    testing.y Engines with Fuel Injection provide better performance

    than carburetor type engines.y This project mainly focuses on usage of sensors, actuators

    and ECU to control the engine. So we choose a fuel

    injection type engine for this work.

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    Sensors & Actuators to be usedThe following sensors are to be used in this project

    y Inductive pick-up (Sensing crank position) sensor y Manifold air pressure sensor y Throttle position sensor y Exhaust Gas Oxygen sensor y Engine oil temperature sensor

    The following actuators are to be used in this project

    y Fuel Injector + Pump actuator y Capacitive discharge ignition

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    Electronic control unitDesigning an ECU using CompactRIOy N ational Instruments CompactRIO is a reconfigurable

    embedded control and acquisition system.y Design a very flexible, programmable motor management

    system using the CompactRIO programmable automationcontroller.

    y The CompactRIO platform contains I/O modules and isexpandable for additional sensors and contains a field-

    programmable gate array (FPGA). With the FPGA thesystem responds instantly and can be graphically

    programmed using LabVIEW.

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    NEXT STE P SH ARDWARE & SOFTWARES TO BE USEDy Engine ECU, sensors and actuators.y

    Labview. WORKS TO BE CARRIED OUT

    y Perform labview programming for the designed robustcontroller and calibration of ECU.

    y Acquire sponsorships and procurement of engine,sensors and actuators, ECU.

    y Set up a test bench and conduct experiments onengine performance.

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