Cycle-by-Cycle Analysis of HC Emissions During Cold Start of Gasoline Engines 952402
A cycle-by-cycle analysis of HC emissions from each cylinder of a four-stroke V-6, 3.3 L production engine was made during cold start. The HC emissions were measured in the exhaust port using a high frequency flame ionization detector (FID). The effect of the initial startup position of the piston and valves in the cycle on combustion and HC emissions from each cylinder was examined. The mass of fuel injected, burned and emitted was calculated for each cycle. The equivalence ratio of the charge in the firing cycles was determined. The analysis covered the first 120 cycles and included the effect of engine transients on HC emissions.
1995 SAE International Fall Fuels and Lubricants Meeting and Exhibition
Developments and Advances in Emission Control Technology-SP-1120, Emission Control and Fuel Economy for Port and Direct Injected SI Engines-PT-91, SAE 1995 Transactions: Journal of Fuels and Lubricants-V104-4