Reducing Inertial Noise for Injector Testing
CASE STUDY: Reducing Inertial Noise for Injector Testing
PROBLEM: Distorted Test Results caused by RPM Fluctuation
We needed to mimic the inertia of a diesel engine driveline in a test bench said Brian Nugent - MCM Inc., Engineering Manager. This particular application we chose a large flywheel. The flywheel was mounted to a shaft that needed to be coupled to a custom camshaft that is actuating a fuel injector. One of the challenges was the stiffness of the coupling. We have found that if the coupling has wind up, even with zero backlash, it will affect how the test is performed by allowing the instantaneous rpm to droop momentarily within part of a revolution.
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