FEM modeling of the piezoelectric driving system in the design of direct-acting diesel injectors

Ferrari, Alessandro; Mittica, Antonio

doi:10.1016/j.apenergy.2012.05.048

Cited by 37 publications

(26 citation statements)

References 23 publications

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“…Direct-acting piezoelectric injectors are characterized by very reduced fuel leakages, due to the absence of a pilot-valve [8,9]. Even indirect-acting piezoelectric injectors are claimed to have lower static leakages than solenoid injectors [10], since the pressure force in piezoelectric injectors tends to close the pilot-valve.…”

Section: Introductionmentioning

confidence: 99%

The new-generation of solenoid injectors equipped with pressure-balanced pilot valves for energy saving and dynamic response improvement

2015

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Section: Introductionmentioning

confidence: 99%

The new-generation of solenoid injectors equipped with pressure-balanced pilot valves for energy saving and dynamic response improvement

2015

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“…In this regard, a major role is played by diesel injectors, which are one of the core components of CR systems [8,9]. Two main driving technologies exist to control the needle lift, and diesel injectors can thus be classified into solenoid- [10,11] or piezoelectric-driven [12,13]. In this latter category, it is possible to further distinguish between directand indirect-acting piezo injectors.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Emissions, Noise, and Fuel Consumption Comparison of Direct and Indirect Piezoelectric and Solenoid Injectors in a Low-Compression-Ratio Diesel Engine

et al. 2019

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An experimental investigation has been carried out to compare the performance and emissions of a low-compression-ratio Euro 5 diesel engine featuring high EGR rates, equipped with different injector technologies, i.e., solenoid, indirect-acting, and direct-acting piezoelectric. The comparisons, performed with reference to a state-of-the-art double fuel injection calibration, i.e., pilot-Main (pM), are presented in terms of engine-out exhaust emissions, combustion noise (CN), and fuel consumption, at low–medium engine speeds and loads. The differences in engine performance and emissions of the solenoidal, indirect-acting, and direct-acting piezoelectric injector setups have been found on the basis of experimental results to mainly depend on the specific features of their hydraulic circuits rather than on the considered injector driving system.

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“…For dealing with multi‐field coupling problems involved layer structure, some methods are adopted. Finite element method is a common choice for this kind of problem for its broad applicability, however very fine meshes are needed if we want to investigate the electro‐elastic fields in piezoelectric plate due to its small thickness and the interfacial effect, which will result in enormous computation burden or even ill conditioned equation . Another choice is transfer matrix method, it is explicit in physical concept and easy to be programmed.…”

Section: Introductionmentioning

confidence: 99%

Two‐dimensional Green's function solution for a tangential line force buried in the three‐phase orthotropic piezoelectric structure

et al. 2019

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Piezoelectric materials, as functional material, are widely used in electronic devices, such as piezoelectric sensors, piezoelectric energy harvester and piezoelectric actuators. In some electronic devices, piezoelectric materials are placed between two substrates in the form of thin sheet. Therefore, this kind of piezoelectric structure is simplified into a three‐phase orthotropic piezoelectric structure which consists of an infinite piezoelectric plate and two semi‐infinite bodies in this paper. In this case, the Green's function solution for a tangential line force buried in the three‐phase orthotropic piezoelectric structure is deduced. Based on this solution, the accurate electro‐elastic fields of the three‐phase orthotropic piezoelectric structure are given. And some numerical examples are designed to investigate the effects of various material properties of the piezoelectric plate or the substrates on the stresses at interfaces and the electric potential difference between interfaces of piezoelectric plate.

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FEM modeling of the piezoelectric driving system in the design of direct-acting diesel injectors

Cited by 37 publications

References 23 publications

The new-generation of solenoid injectors equipped with pressure-balanced pilot valves for energy saving and dynamic response improvement

The new-generation of solenoid injectors equipped with pressure-balanced pilot valves for energy saving and dynamic response improvement

Comparison of the Emissions, Noise, and Fuel Consumption Comparison of Direct and Indirect Piezoelectric and Solenoid Injectors in a Low-Compression-Ratio Diesel Engine

Two‐dimensional Green's function solution for a tangential line force buried in the three‐phase orthotropic piezoelectric structure

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