This program was designed to determine whether driving a vehicle on a dynamometer or baking a vehicle in a paint oven could accelerate the normal decay of background hydro-carbon evaporative emissions from new vehicles. Daily background evaporative emission tests were performed on two groups of three identical Ford LTD's in accordance with the procedures outlined in SAE J17la. All fuel system components were either removed or plugged. The carburetors were removed and the intake manifolds covered with a plate. An auxiliary fuel system was used when running each vehicle on the dynamometer. Daily testing was begun on each vehicle within nine days after manufacturing. One vehicle in each group was a control vehicle, which soaked between daily tests. After each daily test, the second vehicle in each group was driven on the dynamometer for five series of two LA-4 driving schedules, with a 30-minute soak with the engine off following each series. It was then soaked until the next test. The third vehicle in each group was placed in a bake oven at 125 F for 12 hours after each test and then soaked until the next test.
Accelerated Decay of Non-Fuel Evaporative Emissions
1976
47 pages
Report
No indication
English
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