Florian Ivan

The Influence Analysis of the Acceleration Regimes on the Specific WLTC Test Cycle Regarding the Fuel Consumption and Pollutant Emissions for a Vehicle Equipped with a GMPDH

It is known that acceleration regimes have a decisive influence on fuel consumption and pollutant emissions. In this sense, the paper highlights the weight with which these regimes contribute to determining the level of fuel consumption and polluting emissions. In the first phase, all acceleration regimes specific to the current WLTC test cycle are selected. Using mathematical modeling with the AMESim platform, the cumulative (CO2 emissions over the cycle) fuel consumption and pollutant emissions of HC, CO, NOx, PM are determined. For comparison, the same magnitudes for the selected acceleration modes are then determined. This highlights the fact that transient acceleration regimes severely affect both fuel consumption and global emissions by determining the magnitude of these influences. This draws attention to the fact that the acceleration regimes specific to the current test cycle still require far-reaching investigations to optimize the powertrain performance for a vehicle equipped with a Diesel Hybrid powertrain.

Comparative analysis by simulation for behavior of a spark-ignition engine fueled with gasoline and LPG in the transient regimes

It is known that current vehicles must meet stringent demands on pollution limits but also must meet and the dynamical and economical performances. In this context the transient regimes are those affecting this performances, in this paper are presenting the results of the simulations for these regimes using a vehicle powered with two energy sources gasoline and LPG. Have been selected the transient regimes characteristic for NMVEG cycle (New Motor Vehicle Emissions Group). The simulation is performed using AMESim platform and the results have allowed meticulous interpretations for the 16 regimes of acceleration. The results obtained from the simulation will be validated experimentally.

Comparative study on performances of a continuously variable transmission used in two different powertrain architectures

Given the importance of reducing carbon emissions from road transport, price and security of oil supply, hybrid electric vehicle can provide a viable alternative solution to conventional vehicles, equipped with thermal engines, which use fossil fuels. Based on the growing trends of new vehicles sales, which include hybrid and electric vehicles closely associated with their use in terms of harmful emissions, strict regulations are established. In this paper were created models of thermal and hybrid electric powertrains groups, using computer simulation program AVL Cruise, making a comparative study using petroleum fuels for continuously variable transmission. The results obtained highlights both fuel consumption as well as pollutant emissions.

Analysis of the economic and ecological performances in the transient regimes of the European driving cycle for a midsize SUV equipped with a DHEP, using the simulation platforms

Currently, the tendency of the car manufacturers is to continue the expansion of the global production of SUVs (Sport Utility Vehicle), while observing the requirements imposed by the new pollution standards by developing new technologies like DHEP (Diesel Hybrid Electric Powertrain). Experience has shown that the transient regimes are the most difficult to control from an economic and ecological perspective. As a result, this paper will highlight the behaviour of such engines that are provided in a middle class SUV (Sport Utility Vehicle), which operates in such states. We selected the transient regimes characteristic to the NMVEG (New Motor Vehicle Emissions Group) cycle. The investigations using the modelling platform AMESim allowed for rigorous interpretations for the 16 acceleration and 18 deceleration states. The results obtained from the simulation will be validated by experiments.

Modeling the Performances of a Vehicle Provided with a Hybrid Electric Diesel Propulsion System (HEVD)

The paper deals in the first section with a comparative study of the implications of the use of a PDHEVP (Parallel Diesel Hybrid Electric Vehicle Powertrain) on a vehicle from the perspectives of dynamicity, economy and pollution.

Modeling the Performances of a Vehicle Provided with a Spark Ignition Engine Using a Double Energy Source, Gasoline and Liquefied Petroleum Gas

The paper contains in the first part a comparative study of the consequences involved by the use of two power sources for the spark ignition engine respectively the gasoline and liquefied petroleum gas, highlighting the criteria of dynamicity, economy and pollution. In the second part, the paper presents the results of the modeling of the fuel consumption, respectively the criteria for economy, results reported and conducted using the European running cycle NMVEG for both power sources, gasoline and liquefied petroleum gas. In the third part is presented the practical case, based on a project study which involved the identification of all operating points of the engine after the European running cycle NMVEG and respectively the estimation of the polluting emissions resulted from the combustion process taking place both with gasoline and with liquefied petroleum gas for a vehicle provided with a spark ignition engine, using as the processing and simulation software AMESim “Advanced Modeling Environment for Simulation of engineering Systems”.