System and method for engine sound calibration
First Claim
1. A method for calibrating an engine, the engine having a cylinder for combustion of a fuel, the method comprising the following steps:
- setting a set of combustion parameters for the engine;
detecting a combustion noise during combustion proximate to the cylinder;
detecting an engine sound radiated from the engine during combustion;
adjusting the combustion parameters and repeating the steps of detecting a combustion noise and detecting an engine sound;
generating a relationship between the detected combustion noises and the detected engine sounds;
determining a combustion noise level that correlates to a predefined engine sound threshold from the relationship;
adjusting a speed of the engine and a load on the engine and repeating the previous steps to determine a combustion noise level for each engine speed and engine load setting; and
calibrating the engine using the combustion noise levels.
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Accused Products
Abstract
A method for calibrating an engine is provided. The engine includes a cylinder for combustion of a fuel. The method includes setting combustion parameters of the engine, detecting a combustion noise during combustion proximate to the cylinder, detecting an engine sound radiated from the engine during combustion, adjusting the combustion parameters and repeating the steps of detecting a combustion noise and detecting an engine sound. The method further includes generating a relationship between the combustion noises and the engine sounds, determining a combustion noise level that correlates to a predefined engine sound threshold from the relationship, adjusting a speed of the engine and a load on the engine and repeating the previous steps to determine a combustion noise level for each engine speed and engine load setting, and calibrating the engine using the combustion noise levels.
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Citations
12 Claims
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1. A method for calibrating an engine, the engine having a cylinder for combustion of a fuel, the method comprising the following steps:
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setting a set of combustion parameters for the engine; detecting a combustion noise during combustion proximate to the cylinder; detecting an engine sound radiated from the engine during combustion; adjusting the combustion parameters and repeating the steps of detecting a combustion noise and detecting an engine sound; generating a relationship between the detected combustion noises and the detected engine sounds; determining a combustion noise level that correlates to a predefined engine sound threshold from the relationship; adjusting a speed of the engine and a load on the engine and repeating the previous steps to determine a combustion noise level for each engine speed and engine load setting; and calibrating the engine using the combustion noise levels. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for calibrating an engine, the engine having a cylinder for combustion of a fuel, the system comprising:
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a dynamometer for changing a speed of the engine and a load on the engine; an engine calibration system in communication with the engine for varying a set of combustion parameters for the engine; and a noise/vibration/harshness system for detecting a combustion noise proximate to the cylinder of the engine during combustion and for detecting an engine sound radiated from the engine during combustion, the system having a controller having a first control logic for detecting the combustion noise and for detecting the engine sound for each of a set of the combustion parameters, a second control logic for generating a relationship between the combustion noise and the engine sound, a third control logic for determining from the generated relationship a combustion level that correlates to a predefined engine sound threshold, and a fourth control logic for repeating the first control logic, the second control logic, and the third control logic to determine a combustion noise level for each of an engine speed and engine load setting set by the dynamometer. - View Dependent Claims (9, 10, 11, 12)
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Specification