METHOD AND DEVICE FOR CONTROLLING THE OPERATING MODE OF AN INTERNAL COMBUSTION ENGINE
First Claim
1. A method for controlling the operating mode of an internal combustion engine (1) with n cylinders (3) and an injection system (4) with an injection unit (5) per cylinder (3), with the steps:
- a) determination of a digital measuring signal which characterizes the combustion of fuel (6) in the internal combustion engine (1),b) transformation of the digital measuring signal into a frequency range,c) evaluation of the transformed measuring signal, a misfiring of the ignition being detected using the amplitude information of the transformed measuring signal, andif a misfiring of the ignition is detectede) sequential deactivation of the injection of each individual of the n cylinders (3) for a predefined time, and repetition of the steps a) to c) for each of the n cylinders (3),wherein using the amplitude information n/2nd order of the transformed measuring signal a misfiring cylinder (3) is identified.
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Accused Products
Abstract
The invention relates to a method for controlling the operating mode of an internal combustion engine (1) comprising several cylinders (3) and an injection system (4) with one injection unit (5) per cylinder (3). According to said method: a digital measuring signal, which characterizes the combustion of fuel (6) in the internal combustion engine (1), is first determined; said digital measuring signal is then transformed into a frequency range; a misfiring of the ignition is detected using the amplitude information of the transformed measuring signal and if a misfiring has occurred, the injection of the individual cylinders (3) is deactivated sequentially for a predefined period and for each cylinder the corresponding digital measuring signal that characterizes said cylinder is determined and transformed into the frequency range and a misfiring cylinder (3) is identified during the evaluation of the transformed measuring signal using the amplitude information. The invention also relates to a device for controlling the operating mode of an internal combustion engine (1) using a method of this type.
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Citations
20 Claims
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1. A method for controlling the operating mode of an internal combustion engine (1) with n cylinders (3) and an injection system (4) with an injection unit (5) per cylinder (3), with the steps:
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a) determination of a digital measuring signal which characterizes the combustion of fuel (6) in the internal combustion engine (1), b) transformation of the digital measuring signal into a frequency range, c) evaluation of the transformed measuring signal, a misfiring of the ignition being detected using the amplitude information of the transformed measuring signal, and if a misfiring of the ignition is detected e) sequential deactivation of the injection of each individual of the n cylinders (3) for a predefined time, and repetition of the steps a) to c) for each of the n cylinders (3), wherein using the amplitude information n/2nd order of the transformed measuring signal a misfiring cylinder (3) is identified. - View Dependent Claims (2, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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3-11. -11. (canceled)
Specification