Potential of Common Rail Injection System for Passenger Car DI Diesel Engines

Schommers, Joachim; Duvinage, F.; Stotz, Marco; Peters, Arndt; Ellwanger, S.; Koyanagi, Katsuyoshi; Gildein, H.

doi:10.4271/2000-01-0944

Cited by 50 publications

(7 citation statements)

References 3 publications

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“…This paper aims to address the above issues by considering the performance of 2.5 HSDI Common rail Diesel engine operating at characteristic point of the EUDC test emission cycle (i.e., bmep= 8 bar, engine speed= 2733 rpm). This allows to consider a medium load engine (i.e., 45%) condition much more demanding than previously considered [12,17,18]. The present research is based on numerical simulations performed by using the Kiva-3 code updated with physical sub-models at the University of Bologna.…”

Section: Contribution Of the Papermentioning

confidence: 99%

Numerical Study Towards Smoke-Less and NOx-Less HSDI Diesel Engine Combustion

Bianchi¹,

Cazzoli²,

Pelloni³

et al. 2002

SAE Technical Paper Series

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This paper explores the possibility to extend the lowtemperature combustion concept developed for low load conditions to medium load conditions of HSDI DI Diesel engines. The aim is to understand which is the limit of conventional Diesel combustion towards smoke-lees and NOx-less conditions. The present research is based on numerical simulations performed by using the Kiva-3 code updated with physical sub-models. The combined influence of EGR cooling and EGR rate on combustion characteristics and emission formation is analyzed. Then, possible improvements to mixture formation are discussed with particularly emphasis on the use of multiple injection. The calculations show that smoke-less conditions by low-temperature combustion cannot be achieved at medium load and therefore a great role is played by mixture formation. Simulations have revealed that promoting leaner mixtures during spray combustion with further significant benefits on soot engine-out emissions is difficult to accomplish.

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Section: Contribution Of the Papermentioning

confidence: 99%

Numerical Study Towards Smoke-Less and NOx-Less HSDI Diesel Engine Combustion

Bianchi¹,

Cazzoli²,

Pelloni³

et al. 2002

SAE Technical Paper Series

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“…The common rail system, which also includes the high pressure pump, is well known due to performance attributed to the internal combustion engine. Low pollutant emissions, reduced fuel consumption, low noise level are some of the advantages of using this system (Schommers et al, 2000). The high pressure pump is a mechanical system, with subassemblies and electronically controlled with an electric valve.…”

Section: Introductionmentioning

confidence: 99%

Fractures Analysis in High-Pressure Pumps

Iordache

Bujoreanu

2021

Bulletin of the Polytechnic Institute of Iași. Machine Constructions Section

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The wear is a very common physical phenomenon in the mechanical area. It can be observed in different mechanisms in different forms. Depending of the role of the mechanism in the assembly or subassembly of which it is part of, wear can happen. Thus, after a short analysis in the automotive area, it can be observed that in the fuel high pressure pumps, several forms of wear are encountered. Various levels of the wear can be studied. Depending of the working period and the operating conditions of the pump, various types of wear can occur, such as adhesion, corrosion, abrasion, fatigue or erosion. The purpose of this paper is to experimental study a type of wear often encountered in high pressure pumps, whose early identification can be useful in damages prevention in order to assure the pump performance. Some wear examples due to material fractures are described.

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“…This is mainly due to the chemical nature of the diesel fuel itself as well as to the high hydraulic pressures ranging in direct diesel injection systems, such as the Common Rail (CR) technique, up to 1350 bar (135 MPa) or even above (Schommers et al 2000;Bianchi et al 2001;Ganswe 2000). To optimize the performance in respect to injection timings and fuel quantities the integration of miniaturized sensor elements is desired for monitoring the hydraulic status in each injector.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of electron beam welding technique for the integration of robust sensor elements into high-pressure automotive systems

2008

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For ''on board'' diagnosis purposes of the injected fuel quantity flow sensitive elements based on the thermo-resistive measurement principle were integrated into finished Common Rail injection nozzles of valvecovered orifice (VCO) or mini-sac hole (MSH) class. Electron-discharge machining as well as electron beam welding technique are key technologies for a reliable integration procedure. To demonstrate negligible influence on the hydraulic performance of the nozzle after modification an optical measurement set-up is used to record temporally resolved the propagation of the spray patterns ejected from the six injection holes simultaneously. From these investigations the impact on the structural distortion of the valve caused by the welding seam is proved as its position can be directly linked to any chances in spray performance of each individual injection hole. Reducing the energy input during the electron beam welding lowers substantially the asymmetry in spray patterns from hole to hole as the needle uncovers the six injection holes more symmetrically. Besides this important finding, the numerical calculations indicate that the implementation of the sensor chip slightly amplifies the asymmetry induced by the welding process due to an additional weakening of the nozzle body which is confirmed experimentally. Despite these challenges, however, it is demonstrated that appropriate parameters for the integration procedure can be found affecting the hydraulic performance negligible compared to the original state.

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Potential of Common Rail Injection System for Passenger Car DI Diesel Engines

Cited by 50 publications

References 3 publications

Numerical Study Towards Smoke-Less and NOx-Less HSDI Diesel Engine Combustion

Numerical Study Towards Smoke-Less and NOx-Less HSDI Diesel Engine Combustion

Fractures Analysis in High-Pressure Pumps

Evaluation of electron beam welding technique for the integration of robust sensor elements into high-pressure automotive systems

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