Piezo-actuated common rail injector structure and efficient design

Year 2018, Volume: 2 Issue: 3, 97 - 114, 30.09.2018

Hasan Köten , Ebubekir Can Gunes Kubilay Guner

https://doi.org/10.30521/jes.453560

Cited By: 4

Abstract

Piezo-actuated
common rail injectors are often utilized in today’s automobile engines’ fuel
systems. This high-tech instrument decreases fuel consumption, thereby harmful
exhaust emissions are also lowered especially in diesel ignition engines. Owing
to ultra-high pressure in piezo-injection systems, fuel droplets are scaled
down into a smaller particle form and thus provided more efficient combustion.
Pulverized fuel droplets are evaporated and oxidized in a very short time and
they provide exact combustion inside the combustion chamber.  In this study, numerical simulation of a
piezo-actuated common rail injector fluid-mechanical model with detail is
demonstrated. The hydraulic and mechanical component interaction is modeled
through the fluid-mechanical components. Thus, the piezo injector dynamics are
predicted based on the geometry and the physical quantities describing the
equipment. Input voltage in the entrance is used to describe the piezo actuator
force for piezo-electric material. In model, fuel flows from the common rail to
a tee that separates the flow into two paths: fuel gallery and valve with the
inlet orifice. Using this detailed model, behavior of the piezo injector,
effects of the injector parameters on the fuel flow were investigated
numerically and results were represented.

Keywords

Piezo-injector, ICE, Modeling

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