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Study of thermal characteristics, fuel consumption and emissions during cold start using an on-board measurement system for SI car real world urban driving

Lookup NU author(s): Professor Margaret Carol Bell CBE


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Exhaust emissions were measured under real world urban driving conditions using a set of in-vehicle FTIR emission measurement system, which is able to measure 65 emission components simultaneously at a rate of 0.5 Hz. The test vehicle was a EURO 2 emission compliant SI car equipped with real time fuel consumption measurement and temperature measurement along the exhaust pipe across the catalyst allowing the matching of thermal characteristics to emission profiles and monitor fuel consumption. The temperature profile indicated that the light-off of the catalyst took about 150~200 seconds. The warm up of the lubricating oil and coolant water required a longer time than the catalyst did. The impact of ambient temperatures on lubricating oil and coolant water warm ups was greater than that on the light-off of the catalyst. The heat loss and energy balance were calculated during the whole cycle period. The influence of cold start on fuel consumption was investigated. The exhaust emissions were also investigated as a function of warm up time and temperature.

Publication metadata

Author(s): Li H, Andrews GE, Savvidis D, Daham BK, Bell MC, Tate JE, Ropkins K

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: JSAE Technical Paper Series; Fuels and Lubricants Conference

Year of Conference: 2007

Pages: JSAE7355

Publisher: SAE