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PF&L is priority event for mobility professionals that specialize in powertrain, fuels, lubricants technology, including OEM and Tier 1 component suppliers Light medium and heavy-duty vehicle system and product design engineers

Powertrains, Fuels & Lubricants Conference & Exhibition

PF&L is priority event for mobility professionals that specialize in powertrain, fuels, lubricants technology, including OEM and Tier 1 component suppliers Light medium and heavy-duty vehicle system and product design engineers

The article deals with the peculiarities of developing a method for evaluating the fuel efficiency and environmental performance of vehicle engines under conditions of pre- and post-start thermal preparations. The method was designed for gasoline engines converted to run on both liquid petroleum and gaseous fuels (LPG). A thermal treatment system based on a phase transition heat accumulator was used for pre- and post-start heat treatment in operation. An algorithm for determining and evaluating individual thermal preparation criteria for vehicle engines in operational conditions was developed based on the analysis conducted. The method for assessing fuel consumption and harmful emissions in the exhaust gases of vehicles with engines modified to run on LPG and fitted with a phase transition heat accumulator during pre- and post-start thermal preparations was improved. The method development is based on numerous experimental and computational–analytical studies.

Much of the thermal energy derived from combustion of fuel is lost through exhaust gases. By effectively recovering waste heat energy in the form of electricity, it can be used to recharge batteries or power auxiliary systems thus improving both performance and fuel economy. In this work, the use of thermoelectric generators (TEG) for energy recovery were studied using both computational and experimental strategies. The efficiency of TEG (ȠTEG) was analyzed through computational methods by changing temperature gradients, Seebeck coefficient (α), and dimensions of the P- and N-type plates individually. The results of computational analysis showed that in comparison to vertical and planar configuration, mixed-type thermocouple delivered 83.3% and 96% more power, respectively. Raising the α, enhanced the ȠTEG by 57% and lowering α affected the ȠTEG by 9.5% for mixed thermocouples.