Investigation of the Contribution of Deceleration Fuel Cut-off and Start/Stop Technologies to Fuel Economy by Considering New European Driving Cycle

Abstract

Greenhouse gas (GHG) emissions released into the atmosphere cause climate change and air pollution. One of the main causes of GHG emissions is the transportation sector. The use of fossil fuels in internal combustion engine vehicles leads to the release of these harmful gases. For this reason, since 1992, several standards have been introduced to limit emissions from vehicles. Technologies such as reducing engine sizes, advanced compression-ignition or start/stop, and fuel cut-off have been developed to reduce fuel consumption and emissions. In this study, the contribution of deceleration fuel cut-off and start/stop technologies to fuel economy has been examined considering the New European Driving Cycle. Therefore, the fuel consumption values were calculated by creating a longitudinal vehicle model for a light commercial vehicle with a diesel engine. At the end of the study, by using the two strategies together, fuel economies of 17.5% in the urban driving cycle, 3.7% in the extra-urban cycle, and 10% in total were achieved. CO2 emissions decreased in parallel with fuel consumption, by 10.1% in total.

Thermal Aging of Rh/ZrO2–CeO2 Three-Way Catalysts under Dynamic Lean/Rich Perturbation Accelerates Deactivation via an Encapsulation Mechanism

“…Four different exhaust gas feeds were supplied at a flow rate of 178,000 L h –1 : S (A/F = 14.6), L (A/F = 15.0), and R (A/F = 14.1) compositions (Scheme ). Furthermore, three gas feeds, i.e., S (A/F =14.6, 25 s), L (air, 2.5 s), and R (A/F = 13.0, 2.5 s), were cycled sequentially (denoted as SLR) to simulate a fuel cut-off period followed by a rich spike in real driving cycles . Engine aging under the SLR cycle condition was also conducted at 800 and 900 °C for 40 h in a similar manner.…”

“…Furthermore, three gas feeds, i.e., S (A/F =14.6, 25 s), L (air, 2.5 s), and R (A/F = 13.0, 2.5 s), were cycled sequentially (denoted as SLR) to simulate a fuel cut-off period followed by a rich spike in real driving cycles. 44 Engine aging under the SLR cycle condition was also conducted at 800 and 900 °C for 40 h in a similar manner. In addition to engine aging of honeycomb catalysts, a noncoated powder catalyst (as-prepared Rh/ZC) was thermally aged using a laboratory scale flow microreactor under simulated S, L, R, and SLR gas streams (see the Supporting Information, Scheme S1 and Table S1, for details).…”

Development of dual polarization battery model with high accuracy for a lithium-ion battery cell under dynamic driving cycle conditions

“…The WLTP cycle is the most up-to-date test procedure developed in 2018 to report more realistic fuel efficiency values. It has a more comprehensive range of data with low, medium, high and extra-high driving zones [ [39] , [40] , [41] ]. It is therefore important that the model can simulate the voltage with high accuracy, especially for the most aggressive WLTP cycle.…”