Parasitic Loss Reduction for 21st Century Trucks

Hnatczuk, Wsewolod; Lasecki, Michael; Bishop, John; Goodell, Jarrett

doi:10.4271/2000-01-3423

Cited by 30 publications

(11 citation statements)

References 4 publications

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“…In addition, the power consumption is reduced from 0.7 kW to zero when there is no steering. Similar reasoning regarding the nominal power consumption can be applied to the engine oil pump, as shown by Hnatczuk et al [10]. The accessories of the FMTV vehicle that are considered in the analysis and their peak power requirements are as follows: engine fan 26 kW, transmission fluid pump 15 kW, power steering pump 12.9 kW, air brake system compressor 3.7 kW, engine oil pump 4 kW, and engine cooling pump 2 kW.…”

Section: Electrification Of Accessoriesmentioning

confidence: 92%

“…In parallel, researchers considered opportunities for reducing engine parasitic losses (parasitics) by using controllable, electric engine accessories, e.g. Hnatzuk et al [10] evaluated the potential for savings through electrification of coolant and water pumps, while Hendricks et al [11] performed a comprehensive study of the benefits of removing belt-driven mechanical loads, but without addressing the impact of replacing the mechanical loads with electric loads. The work presented here introduces a combined approach, i.e.…”

Section: Current Truck Related Research Initiatives Such As the 21st mentioning

confidence: 99%

See 1 more Smart Citation

Fuel Cell APU for Silent Watch and Mild Electrification of a Medium Tactical Truck

Filipi

Louca

Stefanopoulou

et al. 2004

SAE Technical Paper Series

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This paper investigates the opportunities for improving truck fuel economy through the use of a Fuel Cell Auxiliary Power Unit (FC APU) for silent watch, as well as for powering electrified engine accessories during driving. The particular vehicle selected as the platform for this study is a prototype of the Family of Medium Tactical Vehicles (FMTV) capable of carrying a 5 ton payload. Peak stand-by power requirements for onboard power are determined from the projected future digitized battlefield vehicle requirements. Strategic selection of electrified engine accessories enables engine shutdowns when the vehicle is stopped, thus providing additional fuel savings. Proton Exchange Membrane (PEM) fuel cell is integrated with a partial oxidation reformer in order to allow the use of the same fuel (JP8) as for the propulsion diesel engine. The APU system is modeled and linked with the complete vehicle system simulation, and accessory duty cycles are derived for both silent watch and driving. The results indicate six-fold improvements of the silent watch fuel economy with the FC APU compared to main-engine idling, and relatively modest improvements from the mild electrification and FC APU use during the driving cycle. Combined fuel economy benefits calculated over the hypothetical daily military mission with a combined 10 hour highway/local/off-road driving and 10 hour silent watch are 20.1%.

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Section: Electrification Of Accessoriesmentioning

confidence: 92%

Section: Current Truck Related Research Initiatives Such As the 21st mentioning

confidence: 99%

Fuel Cell APU for Silent Watch and Mild Electrification of a Medium Tactical Truck

Filipi

Louca

Stefanopoulou

et al. 2004

SAE Technical Paper Series

View full text Add to dashboard Cite

show abstract

“…While reducing the cooling system size and weight, several efforts have been attempted to handle increased heat load on the system with innovative cooling strategies such as reverse cooling, split cooling, and nucleate boiling cooling [2]. A number of researchers have also proposed replacing the conventional water pump with an electrically-driven pump that can actively control the coolant flow rate based on the optimum driving temperature [3][4][5][6][7][8]. This concept is beneficial for reducing parasitic losses of engine power and downsizing the whole engine cooling system.…”

Section: Introductionmentioning

confidence: 99%

Feasibility study on a novel cooling technique using a phase change material in an automotive engine

Kim

Choi

Kim

et al. 2010

Energy

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“…Another drawback is that they reduce overall performance and efficieny because such fans and pumps have great difficulty in correctly monitoring and maintain the multible operating temperature levels. Conventional cooling system is generally not very accurate, not controllable and lead to considerable parasitic losses [1]. It is designed to just guarantee a sufficient heat removal at maximum engine output conditions at the worst vehicle operating conditions (low vehicle speed and high ambient temperature) However, these operational conditions only represent approximately 5% of the conditions that the vehicle will encounter during its life [2].…”

Section: Introductionmentioning

confidence: 99%

A Simulation Study of an Advanced Thermal Management System for Heavy Duty Diesel Engines

Nessim¹,

Zhang²,

Zhao³

et al. 2012

Proceedings of the 1st International Conference on Mechanical Engineering and Material Science

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The trend toward high power density engines has led to new implementation of more intelligent thermal management systems. Advanced thermal management systems for internal combustion engines can help in reducing the fuel consumption, pollutant emissions, warm up time, noise level as well as improving comfort and engine durability. In this study, the effect of advanced thermal management system on heavy duty (HD) diesel engine was investigated using FTP-75 driving cycle. Firstly, the cooling system model was validated with experimental data, and then replaced with an advanced thermal management system with PID feedback control using a 1-D simulation model. The simulation results showed a reduction in the time of cold start by 50%, reduction in power consumption of the cooling system by 13%, decrease fuel consumption (4:11) % and decreasing the total frictional torque by 10%. This study investigates how the thermal management system enhances the overall HD diesel engine efficiency.

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Parasitic Loss Reduction for 21st Century Trucks

Cited by 30 publications

References 4 publications

Fuel Cell APU for Silent Watch and Mild Electrification of a Medium Tactical Truck

Fuel Cell APU for Silent Watch and Mild Electrification of a Medium Tactical Truck

Feasibility study on a novel cooling technique using a phase change material in an automotive engine

A Simulation Study of an Advanced Thermal Management System for Heavy Duty Diesel Engines

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