The gasoline injection system used as an auxiliary during cold start of ethanol-fuelled engines has been improved to reduce exhaust emissions levels. In substitution to the conventional system, which introduces gasoline in the throttle body through a calibrated pipe in a hole, an electronic fuel injector and other peripheral components have been used to inject gasoline. Experiments were carried out in an ethanol-fuelled vehicle powered by a 1.0 liter engine to measure regulated exhaust pollutant gases concentrations, to compare the modified system to the conventional one. The tests were according to FTP-75 test cycle, which simulates a typical urban travel including cold start and acceleration during warm-up. The results showed that the concentrations of aldehyde, hydrocarbon, carbon monoxide and oxides of nitrogen emissions were simultaneously reduced when the modified system was used.
Optimized Cold Start Auxiliary System for Emissions Reduction in Ethanol-Fuelled Engines
Sae Technical Papers
SAE Powertrain & Fluid Systems Conference & Exhibition ; 2002
21.10.2002
Aufsatz (Konferenz)
Englisch
Optimized cold start auxiliary system for emissions reduction in ethanol-fuelled engines
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