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assign3 - ME 444 Engine Lab Visit Project Due Download a...

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Unformatted text preview: ME 444 Engine Lab Visit Project Due: 9/22/11 Download a data set from the course website according to instructions at the end of this assignment. The data sets consist of 40 consecutive cycles taken at approximately 1500 RPM on a 1-cylinder engine. The data files recorded by the CAS are: Cyl1PresTrace: 40 cycles of the firing cylinder pressure trace (in bar) IgnitionPulseTrace: 40 cycles of the spark signal InjectionPulseTrace: 40 cycles of the injection pulse These files can be opened in matlab, or they can be exported to excel as well. Engine specs Bore: 83 mm Stroke: 73.9 mm Rod: 225 mm Clearance Volume: 36349 mm^3 In a short technical report, perform the following tasks and explain how each item was calculated: 1. Calculate the displacement (in cm^3) and compression ratio of this engine based on the geometry given. 2. Calculate the instantaneous cylinder volume at different crank angle degrees (CAD) using the basic engine specs given. This can be done by using the appropriate slider-crank relationships that can be found in the SAE...
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