1997-05-20

Developing a Test Procedure for Compression Brake Noise 972038

In this paper, a procedure for the measurement of noise produced by compression brakes on heavy duty trucks is proposed and evaluated. The test procedure is an adaptation of the ISO exterior vehicle noise regulation, ISO 362, to measure compression brake noise. The test consists of two parts, a driveby test and a stationary brake test, which are both developed to accentuate compression brake noise. The proposed test is demonstrated to provide results that are indicative of on-road compression brake noise. The sensitivity of the test results to variations in several test parameters is also examined.

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