This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Development of P-ZEV technology for gasoline engines
Published September 25, 2000 by ISATA - Dusseldorf Trade Fair in United Kingdom
Event: ISATA 2000
This paper describes new technologies for achieving exhaust emission levels much below the Super Ultra Low Emission Vehicle (SULEV) standards and the system was approved as Partial Zero Emission Vehicle (P-ZEV) by the California Air Resources Board (CARB). Catalyst light-off time, for example, has been significantly reduced through the adoption of a catalyst substrate with an ultra-thin wall and a catalyst coating specifically designed for quicker light- off. A high-efficient HC trap system has been realized by combining a two-state HC trap design with improved HC trap catalyst. Comparison of emission results between European test cycle and US FTP cycle was done with the P-ZEV system. And the effect of fuel was also investigated.