System for simulating power plant of automotive vehicle utilizing electrically powered high inertia power plant
First Claim
1. A simulation system for an automotive internal combustion engine applicable to a testing of a vehicular power transmission, comprising:
- a power plant which incorporates a relatively high revolution inertia and having means for compensating said high inertia for achieving a low inertia substantially equivalent to the automotive internal combustion engine;
an engine characteristics generator for receiving predetermined engine operation parameter simulated data and for deriving a control signal for commanding an output torque of said power plant according to a predetermined engine output torque variation characteristic which is set in terms of said engine operation parameter simulated data; and
means responsive to a simulated engine environmental condition indicative data for deriving a correction value based on an environmental condition for correcting said control signal.
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Abstract
A simulation system for an automotive internal combustion engine is suitable for simulating an engine operation for performing a bench test for an engine associated vehicular component, such as an automatic power transmission, an automatic transaxle, a differential gear box, and so forth. The system comprises a power plant which incorporates a relatively high inertia, and means for compensating the high inertia for achieving a low inertia equivalent to the automotive internal combustion engine; an engine characteristics generator receiving predetermined engine operation parameter simulated data for deriving a control signal commanding an output torque of said power plant according to a predetermined engine output torque variation characteristic which is set in terms of said engine operation parameter simulated data, and means, responsive to a simulated engine environmental condition indicative data, for deriving a correction value based on said environmental condition for correcting said control signal.
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Citations
15 Claims
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1. A simulation system for an automotive internal combustion engine applicable to a testing of a vehicular power transmission, comprising:
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a power plant which incorporates a relatively high revolution inertia and having means for compensating said high inertia for achieving a low inertia substantially equivalent to the automotive internal combustion engine; an engine characteristics generator for receiving predetermined engine operation parameter simulated data and for deriving a control signal for commanding an output torque of said power plant according to a predetermined engine output torque variation characteristic which is set in terms of said engine operation parameter simulated data; and means responsive to a simulated engine environmental condition indicative data for deriving a correction value based on an environmental condition for correcting said control signal. - View Dependent Claims (2, 3, 4)
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5. A simulation system for an automotive internal combustion engine applicable to a testing of a vehicular power transmission, comprising:
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a power plant which incorporates a relatively high inertia and means for compensating said high inertia for achieving a low inertia equivalent to the automotive internal combustion engine; an engine characteristics generator for receiving predetermined engine operation parameter simulated data and for deriving a control signal for commanding an output torque of said power plant according to a predetermined engine output torque variation characteristic which is set in terms of said engine operation parameter simulated data; and means for generating associated engine operating parameter data in addition to said predetermined engine operation parameter simulated data. - View Dependent Claims (6, 7, 8)
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9. A method for simulating operation of an automotive internal combustion engine, comprising the steps of:
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generating an engine output torque simulating driving torque by means of a power plant which incorporates a relatively high inertia and means for compensating said high inertia for achieving a low inertia equivalent to the automotive internal combustion engine; deriving a control signal for commanding an output torque of said power plant in terms of given engine simulating parameters according to a predetermined engine output torque variation characteristic which is set in terms of said engine simulating parameters for simulating engine operation at a predetermined engine driving condition represented by said given engine simulating parameters; and deriving a correction value based on an environmental condition for correcting said control signal.
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10. A method for testing an automotive engine associated vehicular component which has a controlled operational state depending upon preselected control parameters, comprising the steps of:
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generating a simulated engine driving torque output by means of a low inertia power plant comprising a relatively high inertia and means for compensating said high inertia for achieving said low inertia which is equivalent to the automotive internal combustion engine; supplying said simulated engine driving torque output to said associated vehicular component to be tested for driving the latter; deriving a control signal for commanding said driving torque of said power plant in terms of given engine simulating parameters according to a predetermined engine output torque variation characteristic which is set in terms of said engine simulating parameters for simulating engine operation at a predetermined engine driving condition represented by said given engine simulating parameters; setting a test condition for said associated vehicular component and supplying a test condition simulating data; and deriving a correction value based on an environmental condition represented by said test condition simulating data for correcting said control signal.
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11. A method for simulating operation of an automotive internal combustion engine, comprising the steps of:
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generating an engine output torque simulating driving torque by means of a power plant which incorporates a relatively high inertia and means for compensating said high inertia for achieving a low inertia equivalent to the automotive internal combustion engine; deriving a control signal for commanding an output torque of said power plant in terms of given engine simulating parameters according to a predetermined engine output torque variation characteristic which is set in terms of said engine simulating parameters for simulating engine operation at a predetermined engine driving condition represented by said given engine simulating parameters; and generating associated engine operating parameter data in addition to said predetermined engine operation parameter value.
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12. A bench testing apparatus for testing an automotive engine associated vehicular component which has a controlled operational state depending upon preselected control parameters, comprising:
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a low inertia engine simulating power plant generating a driving torque simulating engine output, said power plant being cooperated with said associated vehicular component to be tested for supplying said driving torque; an engine characteristics generator for receiving predetermined engine operation parameter simulated data and for deriving a control signal for commanding an output torque of said power plant according to a predetermined engine output torque variation characteristic which is set in terms of said engine operation parameter simulated data; and
means responsive to a simulated environmental condition indicative data representative of an environmental condition of said associated vehicular component for deriving a correction value based on said environmental condition for correcting said control signal. - View Dependent Claims (13, 14, 15)
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Specification