Nissan's gasoline SULEV technology

摘要

A new gasoline-fueled Super Ultra-Low Emissions Vehicle (SULEV) technology has been developed that meets the California Air Resources Board's (CARB) most stringent tailpipe emission levels and zero evaporative emissions, while fulfilling all On-Board Diagnostic II (OBD II) requirements. This paper will describe the various new technologies used in achieving the SULEV standards, such as the HC trap system with an ultra-thin wall substrate for the improvement of catalyst light-off time, and an electrically actuated swirl control valve for reducing cold-start emissions. In addition, a control approach to stabilizing NO{sub}x emissions will also be discussed.