Method and device for diagnosing a blowoff valve for a supercharging device of an internal combustion engine
AssigneeRobert Bosch GmbH
InventorsMartin Brandt, Thomas Bleile, Patrick Menold, Andreas Huber
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Abstract
A method for diagnosing a blowoff valve in an engine system having a supercharged internal combustion engine, the blowoff valve being situated in a blowoff line around a compressor of a supercharging device, by performing the following: detecting a compressor rotational speed indication of the supercharging device; and determining a malfunction of the blowoff valve if the compressor rotational speed indication includes an oscillation after the blowoff valve is activated for opening the blowoff valve.
Claims10
A method for diagnosing a blowoff valve in an engine system, which has a supercharged internal combustion engine, having a supercharging device having a compressor, the method comprising:
- detecting a compressor rotational speed indication of the supercharging device;
- and
- determining a malfunction of the blowoff valve if the compressor rotational speed indication includes an oscillation after the blowoff valve is activated for opening the blowoff valve;
- wherein the blowoff valve is situated in a blowoff line around the compressor of the supercharging device.
A device for diagnosing a blowoff valve in an engine system having a supercharged internal combustion engine, having a supercharging device having a compressor, comprising:
- a processing arrangement, including an arithmetic unit, configured to detect a compressor rotational speed indication of the supercharging device, and to determine a malfunction of the blowoff valve if the compressor rotational speed indication includes an oscillation after the blowoff valve is activated for opening the blowoff valve;
- wherein the blowoff valve is situated in a blowoff line around the compressor of the supercharging device.
An engine system having a supercharged internal combustion engine, having a supercharging device having a compressor, comprising:
- an internal combustion engine;
- and
- a device for diagnosing a blowoff valve in the engine, including:
- a processing arrangement, including an arithmetic unit, configured to detect a compressor rotational speed indication of the supercharging device, and to determine a malfunction of the blowoff valve if the compressor rotational speed indication includes an oscillation after the blowoff valve is activated for opening the blowoff valve;
- wherein the blowoff valve is situated in a blowoff line around the compressor of the supercharging device.
A computer readable medium having a computer program, which is executable by a processor, comprising:
- a program code arrangement having program code for diagnosing a blowoff valve in an engine system, which has a supercharged internal combustion engine, having a supercharging device having a compressor, by performing the following:
- detecting a compressor rotational speed indication of the supercharging device;
- and
- determining a malfunction of the blowoff valve if the compressor rotational speed indication includes an oscillation after the blowoff valve is activated for opening the blowoff valve;
- wherein the blowoff valve is situated in a blowoff line around the compressor of the supercharging device.
Dependencies are inferred from the claim text.