Operation Cycle of Diesel CR Injection Pump via Pressure Measurement in Piston Working Chamber

Chiavola, Ornella; Frattini, Edoardo; Lancione, Simone; Palmieri, Fulvio

doi:10.3390/en14175385

Cited by 6 publications

(4 citation statements)

References 33 publications

(33 reference statements)

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“…In fact, looking at the corresponding curve for the same pump, it is possible to note that the volumetric performance is characterized by small variations between the different fluids. The aged fluids do not markedly degrade the performance, confirming the literature trends [18,19]. On the other hand, the huge impact of fluid aging is evident in Figures 10 and 11, which report the torque efficiency trends.…”

Section: Volumetric and Torque Efficiencysupporting

confidence: 83%

On the Efficiency of Mobile Hydraulic Power Packs Operating with New and Aged Eco-Friendly Fluids

et al. 2023

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With the increasing environmental awareness, in many applications, ranging from agriculture to industry and logistics, a wider and wider use of eco-friendly fluids is desirable. Although the chemical and biological aspects related to environmental compatibility have been extensively investigated by industries and researchers for obvious environmental reasons, not much literature is available on the performance of hydraulic components and systems operating with eco-friendly fluids, especially on the possible degradation of performance due to fluid aging. This work is aimed at studying the influence of eco-friendly fluids on the performance of external gear pumps for compact mobile hydraulic power units, which are among the most widespread hydraulic devices in the world, for their cost-effective and flexible construction. Once the experimental set-up is implemented to be well representative of the hydraulic power packs’ typical arrangement, pump performance is investigated. Pump energy performance is obtained in terms of volumetric efficiency and torque efficiency. Alongside the traditional fluid, two types of eco-friendly fluid available in the market are tested. Once the comparison is complete, the investigations are devoted to highlighting the impact of fluid aging on the pump performance. The fluids were aged through 2000 h operation under heavy-duty thermo-mechanical stress on a separate set-up and, afterwards, the pump performance was tested again with aged fluids. The results allow the assessment of the influence of different fluids on pump performance and a comparison of the impact of new versus aged eco-friendly fluids. The eco-friendly fluids exert a significant effect on the pump energy profile. The pump overall efficiency increases, marking an up to 5% improvement, depending on the cases. Fluid aging is found to reduce the pump’s overall performance. This paper addresses the key points defining the pump performance and provides new information on the topic. The results are original and represent a fundamental contribution to define the best practices for energy and maintenance management of hydraulic systems and to foster the deployment of further studies on models and simulation tools to catch the effect of the fluid condition.

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Section: Volumetric and Torque Efficiencysupporting

confidence: 83%

On the Efficiency of Mobile Hydraulic Power Packs Operating with New and Aged Eco-Friendly Fluids

et al. 2023

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“…As reported in [15], the real-time pressure measurements within the piston working chamber provide the means to discern the suction, compression-expansion, and delivery phases of the fluid. The fuel properties affect distinctly the pumping phases, enabling straightforward comparative analyses, highlighting the behavior of cylinder-piston pair, valve throttling, leakages, and other nonidealities that influence pump operation.…”

Section: Introductionmentioning

confidence: 99%

High Pressure Injection Pump Operating with Renewable Diesel Fuels

Chiavola,

Palmieri,

Verdoliva

2024

Preprint

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The use of renewable fuels for internal combustion engines marks a significant stride towards sustainability in transportation and power generation. Ensuring the compatibility of these fuels with existing diesel engines and infrastructure is paramount for a smooth transition. Diesel engines ca-pable of harnessing the advantages of alternative fuels without extensive modifications offer a pragmatic approach to sustainable power for vehicles and industries. This article investigates the impact of carbon neutral renewable fuel types (HVOs and biodiesel) on the operation of the high-pressure injection pump, focusing on rotational speed and delivery pressure as key parame-ters. Investigations, based on pump operating cycle analysis and volumetric efficiency measure-ments, reveals that while speed dependence is moderate, fuel type significantly influences pump performance. Hydrogenated carbon-neutral fluids (HVOs) demonstrate adequate capabilities compared to conventional fossil fuels, offering promising prospects for reducing environmental impact. The findings underscore the importance of considering fuel properties, particularly com-pressibility modulus. These insights provide valuable guidance for the advancement of sustainable transportation and industrial systems.

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“…In [19], a specific review of the scientific literature on high-pressure diesel injection pumps is reported. The contributions cover many topics that are typically encountered when high-pressure hydraulic machines are investigated, such as tribology, noise, the micro-motion of the piston cylinder pair, and efficiency.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of High-Pressure Injection Pump Operated with Renewable Fuel for Diesel Engines

Chiavola,

Palmieri,

Verdoliva

2024

Energies

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The use of renewable fuels for internal combustion engines marks a significant stride towards sustainability in transportation and power generation. Ensuring the compatibility of these fuels with existing diesel engines and infrastructure is paramount for a smooth transition. Diesel engines capable of harnessing the advantages of alternative fuels without extensive modifications offer a pragmatic approach to sustainable power for vehicles and industries. This article investigates the impact of carbon-neutral renewable fuel types (hydrogenated vegetable oils, or HVOs, and biodiesel) on the operation of a high-pressure injection pump, focusing on rotational speed and delivery pressure as key parameters. Our investigation, based on pump operating cycle analysis and volumetric efficiency measurements, aimed to investigate to what extent shaft speed and fuel type influence pump performance. Hydrogenated carbon-neutral fluids (HVOs) demonstrate adequate hydraulic capabilities compared to conventional fossil fuels. The findings underscore that while the fluids under consideration vary in viscosity and compressibility modulus, it is the compressibility modulus that predominantly affects the pump’s operation cycle. Diesel (fossil) fluid exhibits intermediate characteristics compared to hydrogenated fossil diesel fluids and biodiesel. The differences in terms of volumetric efficiency are finally reported, showing that hydrogenated carbon-neutral fluids do not significantly hinder the pump’s flow rate transfer capability.

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Operation Cycle of Diesel CR Injection Pump via Pressure Measurement in Piston Working Chamber

Cited by 6 publications

References 33 publications

On the Efficiency of Mobile Hydraulic Power Packs Operating with New and Aged Eco-Friendly Fluids

On the Efficiency of Mobile Hydraulic Power Packs Operating with New and Aged Eco-Friendly Fluids

High Pressure Injection Pump Operating with Renewable Diesel Fuels

Characteristics of High-Pressure Injection Pump Operated with Renewable Fuel for Diesel Engines

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