1998-02-23

Cold Start Emissions Investigation at Different Ambient Temperature Conditions 980401

A vital question for car manufacturers in countries where the temperature over night falls below freezing, is the significant increase of CO (carbon monoxide) and HC (hydrocarbon) emissions during the start and warm-up of spark ignition engines.
ECE (Economic Commission for Europe) (UDC) (Urban Driving Cycle) cycles, divided into elementary phases, have been used to determine the level of harmful CO and HC emissions and fuel consumption in the cold start and warm up phase.
Tests were undertaken on cars conditioned in temperatures ranging from +22°C to -15°C have shown significant increases in CO and HC as the temperature decreases.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 43% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.
X