An Improved Under Floor Catalyst for 5-cylinder Turbo-Charged Engines

Laurell, Mats; Gottberg, Ingemar; Idoffsson, Thomas

doi:10.4271/980416

Cited by 3 publications

(1 citation statement)

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“…These can be summarized as follows: optimizing the different injection design parameters (i.e. the degree of atomization, spray angle and targeting relative to the inlet valve seat) to reduce the cylinder wall wetting [5] ; optimizing the intake system and ports design to reduce misfiring and incomplete flame propagation [6][7][8][9] ; developing the aftertreatment system to increase their effectiveness in reducing the emissions, light off temperature, thermal stability over extended period and mileage, increase in back pressure, system complexity packaging and durability [10][11][12][13][14][15][16][17][18][19][20] . Air pollution in Jordan, especially in the Downtown of Amman has been studied.…”

Section: Engine-related Factorsmentioning

confidence: 99%

Evaluation of Fuel Consumption and Exhaust Emissions During Engine Warm-up

Al-Hasan¹

2007

American J. of Applied Sciences

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Engine exhaust emission and fuel consumption during warm-up period was experimentally investigated. Experiment was conducted on a four-stroke four-cylinder spark ignition engine alternatively equipped with CIS and EIS. Fuel consumption; and exhaust emissions included hydrocarbon, carbon monoxide and carbon dioxide were measured as a function of ambient temperature; i.e. 7, 25 and 40ºC. In order to simulate engine operation condition during warm -up period under various ambient temperatures axillaries cooling water and cooling air systems were designed and coupled to the engine being tested. Results show that as the ambient temperature increases the concentration of both hydrocarbon and carbon monoxide and fuel consumption decreases while the carbon dioxide increases. Also, the time required for the engine to fully warm-up is shortened. Moreover, operating the engine when equipped with EIS has a greater effect on HC, CO and fuel consumption reduction compared to when equipped with CIS at the same operation conditions.

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