Method for Checking a Tank System of a Vehicle Having an Internal Combustion Engine, More Particularly of a Motorcycle, and a Motorcycle
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorsRolf KIESEWETTER-MICHLER, Michael PROBST
Life of this patent
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Abstract
In a method for checking a tank system of a vehicle having an internal combustion engine, more particularly of a motorcycle, a tank vent valve is opened for a predefined angle range of an angle of rotation of a crankshaft of the internal combustion engine during an intake stroke of a cylinder of the internal combustion engine, over a plurality of intake strokes, and fluid is drawn from the fuel tank into a suction line via a filter. A pressure upstream of the tank vent valve is measured, and the measured pressure values are analyzed. The internal combustion engine is a single-cylinder engine or a two-cylinder boxer engine.
Claims12
-10. (canceled)
A method for checking a tank system of a vehicle with an internal combustion engine, wherein the tank system comprises a fuel tank, a tank ventilation valve, a filter arranged in a flow path between the fuel tank and the tank ventilation valve, and a suction line, which leads from the tank ventilation valve to the internal combustion engine, the method comprising the steps of:
- opening the tank ventilation valve, in each case, for a predefined angular range (Δα) of a rotational angle (α) of a crankshaft of the internal combustion engine during an intake stroke of a cylinder of the internal combustion engine, over a plurality of intake strokes, wherein fluid is drawn from the fuel tank into the suction line via the filter;
- measuring a pressure upstream of the tank ventilation valve in order to determine pressure values;
- and
- evaluating the pressure values.
A motorcycle, comprising:
- a single-cylinder or a twin-cylinder boxer internal combustion engine;
- a fuel tank;
- a tank ventilation valve for the fuel tank;
- a filter arranged in a flow path between the fuel tank and the tank ventilation valve;
- a suction line, which leads from the tank ventilation valve to the internal combustion engine;
- and
- a shut-off valve, which can prevent fresh air from being supplied to the filter;
- and
- a controller configured to:
- open the tank ventilation valve, in each case, for a predefined angular range (Δα) of a rotational angle (α) of a crankshaft of the internal combustion engine during an intake stroke of a cylinder of the internal combustion engine, over a plurality of intake strokes, wherein fluid is drawn from the fuel tank into the suction line via the filter;
- measure a pressure upstream of the tank ventilation valve in order to determine pressure values;
- and
- evaluate the pressure values.
Dependencies are inferred from the claim text.