Passenger car common rail systems for future emissions standards

Boecking, Friedrich; Dohle, Ulrich; Hammer, Jürgen; Kampmann, Stefan

doi:10.1007/bf03227771

Cited by 12 publications

(6 citation statements)

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“…The common rail injection system represents the standard injection system for Diesel car engines (Boecking, Dohle, Hammer, and Kampmann 2005), (Boehner and Hummel 1997). It operates at a very high pressure level, with an electronic control unit which controls the fuel delivery, injection timing, injection pressure, and rate of injection, for multiple injection strategies.…”

Section: Common Rail Injection Simulationmentioning

confidence: 99%

Interactive visual analysis of large simulation ensembles

Matković¹,

Gračanin²,

Jelovic³

et al. 2015

2015 Winter Simulation Conference (WSC)

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Recent advancements in simulation and computing make it possible to compute large simulation ensembles. A simulation ensemble consists of multiple simulation runs of the same model with different values of control parameters. In order to cope with ensemble data, a modern analysis methodology is necessary. In this paper, we present our experience with simulation ensemble exploration and steering by means of interactive visual analysis. We describe our long-term collaboration with fuel injection experts from the automotive industry. We present how interactive visual analysis can be used to gain a deep understanding in the ensemble data, and how it can be used, in a combination with automatic methods, to steer the ensemble creation, even for very complex systems. Very positive feedback from domain experts motivated us, a team of visualization and simulation experts, to present this research to the simulation community.

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Section: Common Rail Injection Simulationmentioning

confidence: 99%

Interactive visual analysis of large simulation ensembles

Matković¹,

Gračanin²,

Jelovic³

et al. 2015

2015 Winter Simulation Conference (WSC)

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“…The total force transferred to the mass is a combination of the pressure force and the jet force: (12) F ext : External forces from any components attached to the mechanical port.…”

Section: Force Calculationsmentioning

confidence: 99%

“…F total = F pressure + F jet + F ext (12) F ext : External forces from any components attached to the mechanical port.…”

Section: Force Calculationsmentioning

confidence: 99%

“…Indirect-acting CR injectors demands for higher nozzle pressure levels (~2000 bar) [12,9], which is often restricted by the concurrent need for reduced injector leakages [13] which the fuel flow-rates that occur through the pilot valve when it is either open (dynamic leakage) or closed (static leakage). The dynamic leakage does not occur in direct-acting injectors, since there is no pilot valve, and the static leakage is lowered.…”

Section: Introductionmentioning

confidence: 99%

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Piezo-actuated common rail injector structure and efficient design

Köten

Gunes

Guner

2018

Journal of Energy Systems

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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.

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“…Strict emission rules and steadily increasing demands on performance force car manufacturers to constantly improve the design of powertrain systems [BDHK05]. Different types of numerical simulations have thus become a key technology to analyze complex systems like engines.…”

Section: Introductionmentioning

confidence: 99%

HyperMoVal: Interactive Visual Validation of Regression Models for Real‐Time Simulation

Piringer

Berger

Krasser

2010

Computer Graphics Forum

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During the development of car engines, regression models that are based on machine learning techniques are increasingly important for tasks which require a prediction of results in real-time. While the validation of a model is a key part of its identification process, existing computation-or visualization-based techniques do not adequately support all aspects of model validation. The main contribution of this paper is an interactive approach called HyperMoVal that is designed to support multiple tasks related to model validation: 1) comparing known and predicted results, 2) analyzing regions with a bad fit, 3) assessing the physical plausibility of models also outside regions covered by validation data, and 4) comparing multiple models. The key idea is to visually relate one or more n-dimensional scalar functions to known validation data within a combined visualization. HyperMoVal lays out multiple 2D and 3D sub-projections of the n-dimensional function space around a focal point. We describe how linking HyperMoVal to other views further extends the possibilities for model validation. Based on this integration, we discuss steps towards supporting the entire workflow of identifying regression models. An evaluation illustrates a typical workflow in the application context of car-engine design and reports general feedback of domain experts and users of our approach. These results indicate that our approach significantly accelerates the identification of regression models and increases the confidence in the overall engineering process.

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Passenger car common rail systems for future emissions standards

Cited by 12 publications

References 0 publications

Interactive visual analysis of large simulation ensembles

Interactive visual analysis of large simulation ensembles

Piezo-actuated common rail injector structure and efficient design

HyperMoVal: Interactive Visual Validation of Regression Models for Real‐Time Simulation

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