Vehicle powertrain torsional processing system
First Claim
1. A system for processing vehicle powertrain torsional information, the system comprising:
- a vehicle powertrain having a plurality of powertrain components including an internal combustion engine and a number of downstream components driven by the engine;
a speed sensor producing a speed signal indicative of rotational speed of one of the powertrain components; and
a control computer determining a magnitude of an Nth-order torsional component of vehicle powertrain vibration as a function of the speed signal, the control computer executing either of a diagnostic routine relating to the Nth-order torsional component and a control routine controlling operation of the vehicle powertrain away from conditions at which the magnitude of the Nth-order torsional component exceeds a threshold magnitude if the magnitude of the Nth-order torsional component exceeds the threshold magnitude for at least a first predefined duration.
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Accused Products
Abstract
A system is disclosed for processing vehicle powertrain torsional information resulting from vibration of the vehicle powertrain. A speed sensor produces a speed signal indicative of rotational speed of one of the powertrain components, and a control computer is operable to determine a magnitude of an Nth-order torsional component of vehicle powertrain vibration as a function of the speed signal. The control computer is further operable to execute either of a diagnostic routine relating to the Nth-order torsional component and a control routine controlling operation of the vehicle powertrain away from conditions at which the magnitude of the Nth-order torsional component exceeds a threshold magnitude if the magnitude of the Nth-order torsional component exceeds the threshold magnitude for at least a first predefined duration.
26 Citations
28 Claims
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1. A system for processing vehicle powertrain torsional information, the system comprising:
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a vehicle powertrain having a plurality of powertrain components including an internal combustion engine and a number of downstream components driven by the engine; a speed sensor producing a speed signal indicative of rotational speed of one of the powertrain components; and a control computer determining a magnitude of an Nth-order torsional component of vehicle powertrain vibration as a function of the speed signal, the control computer executing either of a diagnostic routine relating to the Nth-order torsional component and a control routine controlling operation of the vehicle powertrain away from conditions at which the magnitude of the Nth-order torsional component exceeds a threshold magnitude if the magnitude of the Nth-order torsional component exceeds the threshold magnitude for at least a first predefined duration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of processing torsional information relating to operation of a vehicle powertrain having a plurality of powertrain components including an internal combustion engine and a number of downstream components driven by the engine, and having a speed sensor producing a speed signal indicative of rotational speed of one of the powertrain components, the method comprising the steps of:
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processing the speed signal to determine a magnitude of an Nth-order torsional component of vehicle powertrain vibration; and executing either of a diagnostic routine relating to the Nth-order torsional component and a control routine controlling operation of the vehicle powertrain away from conditions at which the magnitude of the Nth-order torsional component exceeds a threshold magnitude if the magnitude of the Nth-order torsional component exceeds the threshold magnitude for at least a predefined duration. - View Dependent Claims (20, 21, 22, 23)
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24. A system for processing vehicle powertrain torsional information, the system comprising:
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a vehicle powertrain having a plurality of powertrain components including an internal combustion engine and a number of downstream components driven by the engine; a speed sensor producing a speed signal indicative of rotational speed of one of the powertrain components; and a control computer configured to control engine fueling and to determine an engine load value as a function of the engine fueling, the control computer determining whether the engine speed signal and engine load value are within a speed-load region in which a magnitude of an Nth-order torsional component of vehicle powertrain vibration exceeds a threshold magnitude, and executing either of a diagnostic routine relating to the Nth-order torsional component and a control routine controlling operation of the vehicle powertrain away from the speed-load region if the engine speed signal and engine load value are within the speed-load region for at least a predefined duration. - View Dependent Claims (25, 26, 27, 28)
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Specification