DETECTION OF IRREGULARITIES IN ENGINE CYLINDER FIRING
First Claim
1. A powertrain assembly comprising:
- an engine having at least one cylinder;
at least one electric machine operatively connected to the engine;
a motor speed sensor operatively connected to and configured to obtain motor speed data of the at least one electric machine;
a controller operatively connected to the motor speed sensor, the controller including a processor and tangible, non-transitory memory on which is recorded instructions for executing a method for detection of firing irregularities in the at least one cylinder;
wherein execution of the instructions by the processor causes the controller to;
obtain the motor speed data at a predefined time interval from the motor speed sensor, until a predefined time window is reached;
obtain a fast Fourier transform of the motor speed data during the predefined time window; and
wherein the controller is configured to control the engine based at least partially on the fast Fourier Transform.
1 Assignment
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Accused Products
Abstract
A powertrain assembly includes an engine having at least one cylinder and at least one electric machine operatively connected to the engine. A motor speed sensor is operatively connected to and configured to obtain motor speed data of the electric machine. A controller is operatively connected to the motor speed sensor. The controller including a processor and tangible, non-transitory memory on which is recorded instructions for executing a method for detection of firing irregularities in the at least one cylinder. Execution of the instructions by the processor causes the controller to obtain the motor speed data at a predefined time interval from the motor speed sensor, until a predefined time window is reached. A fast Fourier transform of the motor speed data during the predefined time window is obtained. The controller is configured to control the engine based at least partially on the fast Fourier Transform.
11 Citations
18 Claims
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1. A powertrain assembly comprising:
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an engine having at least one cylinder; at least one electric machine operatively connected to the engine; a motor speed sensor operatively connected to and configured to obtain motor speed data of the at least one electric machine; a controller operatively connected to the motor speed sensor, the controller including a processor and tangible, non-transitory memory on which is recorded instructions for executing a method for detection of firing irregularities in the at least one cylinder; wherein execution of the instructions by the processor causes the controller to; obtain the motor speed data at a predefined time interval from the motor speed sensor, until a predefined time window is reached; obtain a fast Fourier transform of the motor speed data during the predefined time window; and wherein the controller is configured to control the engine based at least partially on the fast Fourier Transform. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for controlling a powertrain assembly having an engine with at least one cylinder, at least one electric machine, a motor speed sensor operatively connected to and configured to obtain motor speed data of the at least one electric machine, and a controller having a processor and tangible, non-transitory memory, the method comprising:
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obtaining the motor speed data at a predefined time interval from the motor speed sensor, until a predefined time window is reached; obtaining a fast Fourier transform of the motor speed data during the predefined time window, via the controller; detecting firing irregularities in the at least one cylinder based at least partially on the fast Fourier transform; and controlling the engine based at least partially on the fast Fourier transform. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A vehicle comprising:
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an engine having one or more cylinders; an electric machine operatively connected to the engine; a motor speed sensor operatively connected to and configured to obtain motor speed data of the electric machine; a controller operatively connected to the motor speed sensor, the controller including a processor and tangible, non-transitory memory on which is recorded instructions for executing a method for detection of irregularities in firing of the one or more cylinders; wherein execution of the instructions by the processor causes the controller to; obtain the motor speed data at a predefined time interval from the motor speed sensor, until a predefined time window is reached; obtain a fast Fourier transform of the motor speed data during the predefined time window; and wherein the controller is configured to control the engine based at least partially on the fast Fourier Transform.
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Specification