Smart cooling system of the double loop coolant structure with engine thermal management modeling

Kang, Hyungmook; Ahn, Hyunchul; Min, Kyoungdoug

doi:10.1016/j.applthermaleng.2014.12.042

Cited by 43 publications

(21 citation statements)

References 12 publications

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“…Gasoline engines "downsizing" and supercharging boosting [5], innovative intake strategies [6][7][8], cooled external exhaust gas recirculation [9], and innovative after-treatment technologies [10,11] have been shown to improve the efficiency of spark-ignited gasoline engines. A further contribution to fuel consumption reduction is given by the adoption of an optimized engine thermal management [12,13]. In fact, with optimized thermal management, a contribution of about 3% over the total CO 2 decrease was estimated [5] and, if compared to different technological options, it is the most cost-effective by accounting for about 200 Euro/(km/L saved) [14].…”

Section: Introductionmentioning

confidence: 99%

“…The primary requirement of optimized thermal management is the reduction of the warm-up time, which, by speeding-up lubricant heating, reduces frictional losses [13][14][15] and improves engine efficiency as a direct consequence. Lower coolant flow rates than the ones delivered by the traditional engine cooling system are, therefore, needed in this case.…”

Section: Introductionmentioning

confidence: 99%

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Application of a Model-Based Controller for Improving Internal Combustion Engines Fuel Economy

et al. 2020

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Improvements in internal combustion engine efficiency can be achieved with proper thermal management. In this work, a simulation tool for the preliminary analysis of the engine cooling control is developed and a model-based controller, which enforces the coolant flow rate by means of an electrically driven pump is presented. The controller optimizes the coolant flow rate under each engine operating condition to guarantee that the engine temperatures and the coolant boiling levels are kept inside prescribed constraints, which guarantees efficient and safe engine operation. The methodology is validated at the experimental test rig. Several control strategies are analyzed during a standard homologation cycle and a comparison of the proposed methodology and the adoption of the standard belt-driven pump is provided. The results show that, according to the control strategy requirements, a fuel consumption reduction of up to about 8% with respect to the traditional cooling system can be achieved over a whole driving cycle. This proves that the proposed methodology is a useful tool for appropriately cooling the engine under the whole range of possible operating conditions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Application of a Model-Based Controller for Improving Internal Combustion Engines Fuel Economy

et al. 2020

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“…A variable-speed water pump with proper coolant flow control was adopted to increase the fuel economy by about 2.5%. Based on thermal management modeling, Kang [3] designed a double loop coolant circuit for the cylinder head and engine block, which indicates 30% coolant flow rate of the basic system can satisfy the thermal requirement of the target engine. Wang [4] presented a nonlinear adaptive control strategy for a radiator fan matrix for transient engine temperature tracking and the power consumption was reduced greatly.…”

Section: Introductionmentioning

confidence: 99%

Thermal Characteristics Investigation of the Internal Combustion Engine Cooling-Combustion System Using Thermal Boundary Dynamic Coupling Method and Experimental Verification

Zhang

Lin

et al. 2018

Energies

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The engine cooling system must be able to match up with the stable operating conditions so as to guarantee the engine performance. On the working cycle level, however, the dynamic thermo-state of engines has not been considered in the cooling strategy. Besides, the frequent over-cooling boiling inside the gallery changes the cooling capacity constantly. It is necessary to study the coupling effect caused by the interaction of cooling flow and in-cylinder combustion so as to provide details of the dynamic control of cooling systems. To this end, this study develops a coupled modeling scheme of the cooling process considering the interaction of combustion and coolant flow. The global reaction mechanism is used for the combustion process and the multiphase flow method is employed to simulate the coolant flow considering the wall boiling and the interphase forces. The two sub-models exchange information of in-cylinder temperature, heat transfer coefficient, and wall temperature to achieve the coupled computation. The proposed modeling process is verified through the measured diesel engine power, in-cylinder pressure, and fire surface temperature of cylinder head. Then the effects of different cooling conditions on the cyclic engine performances are analyzed and discussed.

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“…Experimental and theoretical studies have shown that a large portion of vehicles emissions (both CO 2 and harmful pollutants) are largely induced during cold engine [3,4] in the early phase of a driving cycle [5]. This is mainly due to higher engine internal frictional losses [6], ineffective combustion, and the low efficiency of catalytic converters [7].…”

Section: Introductionmentioning

confidence: 99%

Improving Engine Oil Warm Up through Waste Heat Recovery

Battista

Cipollone

2017

Energies

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Abstract:In the transportation sector, engine oil thermal management has not yet received the attention it deserves in the path towards carbon dioxide and pollutants reduction. During the homologation cycle (which represents a typical daily trip), oil temperature reaches its thermal steady value, which insures best performances in terms of viscosity, only in the final part of the trip, when most part of the harmful emissions have been already emitted; therefore, a warm up acceleration would surely represent a strong beneficial action. In this paper, a faster warming up of the lubricant oil was done using the heat owned by the exhaust gases, which was almost immediately ready after the engine ignition, in the early part of a driving cycle. An experimental activity has been developed in a turbocharged engine (F1C 3L IVECO), modifying the oil circuit in order to heat up the oil during the cold phase of a homologation cycle by the exhaust gases. A significant reduction of fuel consumption and pollutant emissions savings has been experimentally demonstrated. Also, the interaction between the modified oil circuit, engine, coolant circuit, and exhaust line has been investigated in order to have a system view of the new heating oil technology.

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Smart cooling system of the double loop coolant structure with engine thermal management modeling

Cited by 43 publications

References 12 publications

Application of a Model-Based Controller for Improving Internal Combustion Engines Fuel Economy

Application of a Model-Based Controller for Improving Internal Combustion Engines Fuel Economy

Thermal Characteristics Investigation of the Internal Combustion Engine Cooling-Combustion System Using Thermal Boundary Dynamic Coupling Method and Experimental Verification

Improving Engine Oil Warm Up through Waste Heat Recovery

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