Today was another well-spent afternoon hanging out in the Sloan Automotive Lab! Our class split into two groups and my group spent the afternoon collecting data for the engine operation lab. The lab had two components. The first half of the lab was focused on measuring the MAP, NIMEP, Fuel Pressure, COV of GIMEP, and exhaust temperature of the engine when different spark timings were used. The Air-Fuel Ratio was held constant at stoichiometric for these tests. The dry exhaust gas was collected and the concentration of NOx, CO, HC, CO2 in the gas was measured. The second half of the lab varied the Air-Fuel Ratio and the spark timing was constant (the Max Brake Torque spark timing was used). The same measurements were collected. All in all, it was a cool experience and I welcomed the chance to spend the afternoon in the Sloan Automotive Lab. It’s a bummer 2.61 (Internal Combustion Engines) only had two labs! I still need to process all the data and do a lab write-up. I’ll post some scans of the data and the resulting write-up later.
The engine controls and data readouts are kept outside of the room with the engine, engine mount and test apparatuses. A shatterproof window allowed visual access to the engine and the test apparatuses while providing protection to the engine operators.
The exhaust gas from the engine is collected so that the concentration of NOx, CO, HC, and CO2 are measured. CO, HC, and CO2 values are displayed on the screen.
And that’s it! When I finish the lab report I’ll post the data and some of the conclusions I reached.