Method and device for monitoring an exhaust-gas turbocharger
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Abstract
The present invention relates to a method and a device for monitoring an exhaust-gas turbocharger of an internal combustion engine. In order to create an inexpensive and also reliably operating method and a corresponding device for monitoring an exhaust-gas turbocharger, it is proposed that a sound transducer which is designed to record rotational-speed dependent turbocharger operating noise is provided, which sound transducer is connected to an electronic system for frequency analysis for the output of a turbocharger rotational speed signal.
18 Citations
20 Claims
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1-8. -8. (canceled)
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9. A device for monitoring an exhaust-gas turbocharger of an internal combustion engine, the device comprising:
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at least one sound transducer adapted to receive a rotational-speed-dependent turbocharger operating noise and output a signal; and an electronic system coupled to the at least one transducer for frequency analysis of the signal, the electronic system adapted to output a turbocharger rotational speed signal. - View Dependent Claims (10, 11, 12, 13, 17, 18)
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14. A method for monitoring an exhaust-gas turbocharger of an internal combustion engine, the method comprising:
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receiving a rotational-speed-dependent operating noise of the turbocharger by at least one sound transducer; outputting a signal of the at least one sound transducer based at least in part on the rotational-speed-dependent operating noise of the turbocharger; and evaluating the output signal of the at least one sound transducer an electronic system to determine a turbocharger rotational speed. - View Dependent Claims (15, 16)
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19. A device for monitoring an exhaust-gas turbocharger of an internal combustion engine, the device comprising:
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a first sound transducer adapted to generate sound wave; at least one second transducer adapted to receive a rotational-speed-dependent turbocharger operating noise and the generated sound wave dependent on an air mass flow-rate and to output a signal; and an electronic system coupled to the at least one second transducer for analysis of the signal, the electronic system adapted to output a turbocharger rotational speed signal and the air mass flow rate. - View Dependent Claims (20)
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Specification