Abstract
In the transportation sector, engine oil thermal management has not yet received the attention it deserves in the path towards carbon dioxide and pollutants reduction. During the homologation cycle (which represents a typical daily trip), oil temperature reaches its thermal steady value, which insures best performances in terms of viscosity, only in the final part of the trip, when most part of the harmful emissions have been already emitted; therefore, a warm up acceleration would surely represent a strong beneficial action. In this paper, a faster warming up of the lubricant oil was done using the heat owned by the exhaust gases, which was almost immediately ready after the engine ignition, in the early part of a driving cycle. An experimental activity has been developed in a turbocharged engine (F1C 3L IVECO), modifying the oil circuit in order to heat up the oil during the cold phase of a homologation cycle by the exhaust gases. A significant reduction of fuel consumption and pollutant emissions savings has been experimentally demonstrated. Also, the interaction between the modified oil circuit, engine, coolant circuit, and exhaust line has been investigated in order to have a system view of the new heating oil technology.
Highlights
The recent concern about global warming has produced a series of international policies and agreements aimed at reducing greenhouses gas concentration in the atmosphere
30 L/min, reporting thethermal effect ofenergy the oil enthalpy and reported in Figure 3; in the first 800 s, when the Waste Heat Recovery (WHR)-to-oil is applicable, the average available on the exhaust gases wasted in the atmosphere
Fuel consumption is reduced of about 3.6%, performed, highlighting the great reductions achieved
Summary
The recent concern about global warming has produced a series of international policies and agreements aimed at reducing greenhouses gas concentration in the atmosphere. Limits on CO2 emissions have been imposed. Primary pollutant emissions (HC, CO, NOx , and PM) have to be kept regulated and limited at the same time [2]. CO2 and harmful pollutants) are largely induced during cold engine [3,4] in the early phase of a driving cycle [5]. This is mainly due to higher engine internal frictional losses [6], ineffective combustion, and the low efficiency of catalytic converters [7]
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