Optimal Energy and Emission Management of a Diesel Hybrid Electric Vehicle Equipped with a Selective Catalytic Reduction System

Tschopp, Florian; Nüesch, Tobias; Wang, Mu; Onder, Christopher H.

doi:10.4271/2015-24-2548

Cited by 10 publications

(4 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 4 illustrates the structure and current flow pattern of an extrusion electric heater. Another typical technique for creating metal honeycomb heaters is extrusion [8 Developing a high-performing honeycomb body with minimal porosity is feasible by truding a molten powdered-state metal material, typically made of a ferrochrome alum num alloy [82]. To achieve the desired direction of electric current and the ideal heat d tribution to adjust the honeycomb resistance, slits of a specific length and width can cut in the honeycomb's outer edges.…”

Section: Structure Of Electric Heatersmentioning

confidence: 99%

Applications of Electric Heating Technology in Vehicle Exhaust Pollution Control

Li,

Xiao,

Wang

et al. 2024

Processes

View full text Add to dashboard Cite

Motor vehicle exhaust is an important cause of atmospheric pollution. Nowadays, mainstream exhaust emission aftertreatment technologies, such as TWC, DOC, SCR, and DPF, usually require sufficient temperature to perform good purification or maintain normal working conditions. Compared with exhaust gas heating technologies such as engine enrichment and fuel injection, electric heating technology can quickly increase the temperature of exhaust gas aftertreatment devices without adverse effects on engine operating conditions. This article introduces the research and progress of electric heating technology combined with traditional aftertreatment devices on major types of vehicles, such as gasoline vehicles, diesel vehicles, motorcycles, and hybrid vehicles, to improve exhaust purification efficiency and its accompanying fuel consumption impact. In addition, the common structure and characteristics of electric heaters, as well as the current status and development trend of electric heating unit technologies such as electric heating power supply are introduced.

show abstract

Section: Structure Of Electric Heatersmentioning

confidence: 99%

Applications of Electric Heating Technology in Vehicle Exhaust Pollution Control

Li,

Xiao,

Wang

et al. 2024

Processes

View full text Add to dashboard Cite

show abstract

“…In HEVs, the torque split between the combustion engine and the electric propulsion components can be used to optimize the overall fuel consumption and emissions. In [17,18], dynamic programming (DP) was used to find the optimal operation offline. In [19], a real-time capable optimization method to solve the problem was presented.…”

Section: Literature Review: Optimal Powertrain Controlmentioning

confidence: 99%

“…For all of the examples above, the engine calibration was considered to be fixed. While only the torque split was optimized in [18,[20][21][22][23][24], the gear selection and the engine on/off decisions were further considered in [17,19].…”

Section: Literature Review: Optimal Powertrain Controlmentioning

confidence: 99%

Optimal Integrated Emission Management through Variable Engine Calibration

Ritzmann

Chinellato²,

Hütter³

et al. 2021

Energies

Self Cite

View full text Add to dashboard Cite

In this work, the potential for improving the trade-off between fuel consumption and tailpipe NOx emissions through variable engine calibration (VEC) is demonstrated for both conventional and hybrid electric vehicles (HEV). First, a preoptimization procedure for the engine operation is proposed to address the challenge posed by the large number of engine control inputs. By excluding infeasible and suboptimal operation offline, an engine model is developed that can be evaluated efficiently during online optimization. Next, dynamic programming is used to find the optimal trade-off between fuel consumption and tailpipe NOx emissions for various vehicle configurations and driving missions. Simulation results show that for a conventional vehicle equipped with VEC and gear optimization run on the worldwide harmonized light vehicles test cycle (WLTC), the fuel consumption can be reduced by 5.4% at equivalent NOx emissions. At equivalent fuel consumption, the NOx emissions can be reduced by 80%. For an HEV, the introduction of VEC, in addition to the optimization of the torque split and the gear selection, drastically extended the achievable trade-off between fuel consumption and tailpipe NOx emissions in simulations. Most notably, the region with very low NOx emissions could only be reached with VEC.

show abstract

“…As the engine and aftertreatment systems are highly nonlinear and constrained, the above mentioned works use model predictive controllers to handle the high-level objectives and constraints. For vehicles with emissions aftertreatment systems, researchers have also studied control strategies to achieve near-optimal fuel economy and/or tailpipe emissions performances [25][26][27][28] . Here a trade-off emerges between fuel economy, tailpipe emissions and urea dosage if a urea aftertreatment system is used, because a higher aftertreatment efficiency needs extra fuel consumption for heat maintenance and higher level of urea, especially for low-speed urban cycles, where the engine operates at cool conditions, causing a cooler and less effective aftertreatment system.…”

Section: Introductionmentioning

confidence: 99%

Hardware-in-the-loop exploration of energy versus emissions trade-off in eco-following scenarios for connected automated vehicles

Huang

Salehi

Stefanopoulou

et al. 2022

International Journal of Engine Research

View full text Add to dashboard Cite

Studies on eco-driving have mostly taken an energy-centric view and considered driving performance, while less attention has been paid on emissions behavior. This work extends in an experimentally verified way our understanding of the trade-offs among fuel economy, driving aggressiveness, and, especially, emissions in connected automated diesel-powered vehicles. Experiments are performed with a 6.7-L Ford Powerstroke diesel engine, a urea-SCR based NOx aftertreatment system, and a full model for a Ford F250 medium-duty truck in the loop to provide realistic assessment of fuel consumption, tailpipe emissions, and driving style performances. An energy and emissions conscious speed planner is leveraged to follow the traffic. This planner offers flexibility in prioritizing energy or emissions while satisfying user-defined headway constraints, and thus allows exploration of different calibrations in a unified way. Results show how various calibrations of the flexible leader following policy yield 8%–14% decrease in total fuel consumption and 64%–70% decrease in tailpipe emissions compared with a strictly constrained following policy.

show abstract

Optimal Energy and Emission Management of a Diesel Hybrid Electric Vehicle Equipped with a Selective Catalytic Reduction System

Cited by 10 publications

References 24 publications

Applications of Electric Heating Technology in Vehicle Exhaust Pollution Control

Applications of Electric Heating Technology in Vehicle Exhaust Pollution Control

Optimal Integrated Emission Management through Variable Engine Calibration

Hardware-in-the-loop exploration of energy versus emissions trade-off in eco-following scenarios for connected automated vehicles

Contact Info

Product

Resources

About