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charge pressure

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  • March 15, 2012 at 11:22 pm #304
    Anonymous
    Inactive

    Im using inlet manifold data to change the loading of the engine e.g 20nm/60nm etc.
    How do I change the manifold pressure to increase the loading while keeping the charge pressure (in cylinder pressure when inlet valve is open) at 1 bar?

    March 20, 2012 at 9:35 am #456
    Carlo CaligiuriCarlo Caligiuri
    Participant

    hi ghatman,

    I’m not sure if I understood what you asked for, but maybe with a few iterations I could be of some help.

    Im using inlet manifold data to change the loading of the engine e.g 20nm/60nm etc.

    I guess you’re modeling a turbocharged engine and you want to perform simulations at diferent engine loads. I guess you’re modifying fuel quantity and, therefore, intake manifold pressure (and engine torque) changes.

    How do I change the manifold pressure to increase the loading while keeping the charge pressure (in cylinder pressure when inlet valve is open) at 1 bar?

    I’m not sure I understood this. When intake manifold pressure increases, in-cylinder pressure would do it as well (assuming no change to intake valves’ pressure loss is added).

    March 23, 2012 at 4:46 pm #457
    Anonymous
    Inactive

    sorry the question wasn’t clear but have figured it out, thanks.
    I do have another question though. In terms of engine load, for example 20Nm, do I modify the engine model so that the effective torque is 20Nm or so that the net torque is 20Nm?

    March 23, 2012 at 7:58 pm #458
    Anonymous
    Inactive

    like which torque value is the load torque?

    April 1, 2012 at 8:35 pm #459
    sreenathiit12sreenathiit12
    Member

    Net torque is the engine total engine torque produce by the engine combustion, effective torque includes the effect of the mechanical losses. Are you asking this?

    April 3, 2012 at 9:07 pm #460
    Anonymous
    Inactive

    Yes this answers my question.
    Thanks alot

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