System and method for engine sound calibration

Measuring and testing – Internal combustion engine or related engine system or... – Irregular combustion

Reexamination Certificate

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C073S035090

Reexamination Certificate

active

07484405

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.

REFERENCES:
patent: 5445026 (1995-08-01), Eagan
patent: 6850836 (2005-02-01), Scholl et al.
patent: 6892568 (2005-05-01), Witer et al.
patent: 2004/0149022 (2004-08-01), Witer et al.
patent: 2004/0260453 (2004-12-01), Sauler et al.
patent: 2008/0190185 (2008-08-01), Zimmer

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