Modeling and Analytical Solutions for Optimal Heating of Aftertreatment Systems

Holmer, Olov; Eriksson, Lars

doi:10.1016/j.ifacol.2019.09.083

Cited by 3 publications

(3 citation statements)

References 16 publications

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“…In these aftertreatment devices, catalyst devices require sufficient temperature to achieve good purification efficiency, and particulate matter filters also need to be regularly regenerated at high temperatures to maintain good performance. To provide the above favorable temperature conditions, there are various heating methods [12], such as coolant heating, lubricating oil heating, heat storage, electric heating technology, and fuel reforming.…”

Section: Introductionmentioning

confidence: 99%

Applications of Electric Heating Technology in Vehicle Exhaust Pollution Control

Li,

Xiao,

Wang

et al. 2024

Processes

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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.

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Section: Introductionmentioning

confidence: 99%

Applications of Electric Heating Technology in Vehicle Exhaust Pollution Control

Li,

Xiao,

Wang

et al. 2024

Processes

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“…China's recently proposed StageIV emission regulations preliminarily stated that the system NOx emission limit for a middle range diesel engine(power within 130 kW-560 kW) should be 2.0 g/kWh, the NH 3 slip limit 25 ppm, and the Particle Matter(PM) limit 0.025 g/kWh, while a Particle Number(PN) requirement is also added with a limitation of 5 × 10 12 [1]. Fulfilling strict emission regulations on nonroad diesel engine requires a complex aftertreatment with DOC + DPF + SCR.…”

Section: Introductionmentioning

confidence: 99%

“…Meng and Bai et al emphasized that the exhaust temperature is critical for DPF regeneration, and they applied experimental methods to optimize engine thermal management control strategies to achieve a specific exhaust gas temperature for DPF on PN control to meet the strict PN emission levels [9,10]. Luján and Holmer et al applied engine calibration to control the aftertreatment inlet exhaust gas temperature and used modeling and analytical methods on the literature regarding what is critical for aftertreatment in order to reach the specific exhaust gas temperatures for the best conversion efficiency [11,12] Aftertreatment packaging design is another key area of research in existing studies. Liu et al emphasized the importance of the diesel exhaust aftertreatment system design, especially the SCR system related packaging design, which affects SCR emission performance [13].…”

Section: Introductionmentioning

confidence: 99%

Research on Aftertreatment Inlet_Outlet Insulation for A Nonroad Middle Range Diesel Engine

2020

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Diesel exhaust aftertreatment systems are required for meeting China StageIV emission regulations. This paper addresses an aftertreatment system designed to meet the China StageIV emission standards for nonroad vehicle markets. It presents a comprehensive experimental research work on aftertreatment skin temperature and the radiated impact on its neighboring parts in a nonroad vehicle powered by a middle range diesel engine under aftertreatment inlet/outlet with insulation and without insulation with multiple experimental conditions, as well as validating the emission results with these two different aftertreatment configurations. According to the experimental results, it can be observed that the aftertreatment inlet/outlet with insulation and without insulation using a Diesel Oxidant Catalyst (DOC) + Diesel Particle Filter (DPF) + Selective Catalytic Reduction (SCR) scheme could both meet China StageIV emission regulations and the whole vehicle arrangement. The connection pipe is generally short between the aftertreatment and the engine turbo charger on nonroad application vehicles, which results in the exhaust gas temperature of the internal aftertreatment at each point being similar, with variation within ±2% for the aftertreatment inlet/outlet with insulation compared to the aftertreatment inlet/outlet without insulation. The aftertreatment skin temperature differences under these two configurations occur on the inlet module and outlet module, and the skin temperatures of other aftertreatment modules are little impacted. These experimental results also validate the radiation model. All aftertreatment skin temperatures are measured with different experimental conditions. In future, if considering integrating other parts like sensors on the surface of the aftertreatment, the configuration with insulation is recommended. As per the experimental results, the maximum inlet skin temperature can lower nearly 50% with insulation and the maximum outlet temperature could lower about 28% compared to the configuration without inlet/outlet insulation. If taking cost into consideration, the configuration without insulation is suggested. This research also introduces alternative solutions for different concerns for real applications. The methodology provides effective guidance and reference for future aftertreatment insulation considerations for inlet modules and outlet modules on real applications.

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Numerical Study of the Maximum Impact on Engine Efficiency When Insulating the Engine Exhaust Manifold and Ports during Steady and Transient Conditions

Broatch¹,

Olmeda²,

Martín³

et al. 2020

SAE Int. J. Adv. & Curr. Prac. in Mobility

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<div class="section abstract"><div class="htmlview paragraph">In the present work, a study about the impact on engine performance, fuel consumption and turbine inlet and outlet temperatures with the addition of thermal insulation to the exhaust ports, manifold and pipes before the turbocharger of a 1.6L Diesel engine is presented. First, a 0D/1D model of the engine was developed and thoroughly validated by means of an extensive testing campaign. The validation was performed by means of steady state and transient running conditions and in two different room temperatures: 20°C and -7°C. Once the validation was complete, in order to evaluate the maximum gain by means of insulating materials, the exhaust air path before the turbine was simulated as adiabatic. Results showed that the thermal insulation proved to have a great potential in regard to T4 increase that would lead to a reduction of the warm up time of the aftertreatment systems. However, its impact on engine efficiency was limited in both steady and transient conditions.</div></div>

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Modeling and Analytical Solutions for Optimal Heating of Aftertreatment Systems

Cited by 3 publications

References 16 publications

Applications of Electric Heating Technology in Vehicle Exhaust Pollution Control

Applications of Electric Heating Technology in Vehicle Exhaust Pollution Control

Research on Aftertreatment Inlet_Outlet Insulation for A Nonroad Middle Range Diesel Engine

Numerical Study of the Maximum Impact on Engine Efficiency When Insulating the Engine Exhaust Manifold and Ports during Steady and Transient Conditions

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