Development of Diesel Engine using New Fuel Injection System - Direct Monitoring of Fuel Injection Pressure using Injector with Built-in Sensor, and its Applications

Miyaura, Takeshi; Morikawa, Atsushi; Ito, Yoshiyasu; Ishizuka, Koji; Tsuiki, Toyomori

doi:10.4271/2013-01-1739

Cited by 9 publications

(6 citation statements)

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“…Assuming these differences are repetitive from cycle to cycle, it is considered as part of the system behavior for the fuel injection controller. When accurate fuel injection profiles can be achieved by actively measuring the injected fuel amount, see, e.g., [5], fuel injector's dynamical behavior can be excluded and injection parameters can be defined as the actual injection timing and duration of each pulse. With m ∈ N pulses in one combustion cycle, the injection parameter u ∈ R 2m for each fuel injector is defined as…”

Section: A Input and Output Signalsmentioning

confidence: 99%

“…This enables lower engine-out emissions [1], such as nitrogen oxides (NOx) and particulate matter (PM). However, degradation in combustion performance may occur due to disturbances, such as changing intake conditions [2], different fuel properties [3], [4] and injector wear [5]. Closed-loop combustion control can be applied to keep the desired emission level and fuel economy in the presence of disturbances.…”

Section: Introductionmentioning

confidence: 99%

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Systematic Design of Multivariable Fuel Injection Controllers for Advanced Diesel Combustion

Luo

Donkers

Jager

et al. 2019

IEEE Trans. Contr. Syst. Technol.

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Section: A Input and Output Signalsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Systematic Design of Multivariable Fuel Injection Controllers for Advanced Diesel Combustion

Luo

Donkers

Jager

et al. 2019

IEEE Trans. Contr. Syst. Technol.

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“…Accurate control of engine's operating conditions is an effective way to reduce the combustion variations, e.g., using advanced air-path control [3] and fuel injection pressure control [4]. However, these methods have limited effects in reducing the cyclic variation, due to their slow dynamical response.…”

Section: F Donkers Bram De Jager and Frank Willemsmentioning

confidence: 99%

<inline-formula> <tex-math notation="LaTeX">$\mathcal{H}_{\text{2}}$ </tex-math> </inline-formula>-Norm-Based Multi-Pulse Diesel Fuel Injection Control With Minimal Cyclic Combustion Variation

Luo

Donkers

Jager

et al. 2018

IEEE Control Syst. Lett.

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“…These injection controls enable a very high injection quantity accuracy and close timings between pilot and main injection that are favorable for reducing nitrogen oxide emissions [9]. It is postulated that these closed-loop control systems allow to compensate for detrimental effects like wear or coking by maintaining injection rate and quantities over engine lifetime [10] [11]. The German Research Foundation has funded a project at Technical University of Munich to investigate the influence of these alterations like wear and coking onto critical parameters as the injection rate and eventually the engine-out emissions.…”

Section: Introductionmentioning

confidence: 99%

“…All these principles have in common that the fuel pressure inside the injector is measured and evaluated applying pressure transducers to the injectors [9] [11] or utilizing the piezo-actuator of the injector itself to calculate the inside pressure [12]. Algorithms are utilized to determine key injection parameters like start and end of injection as well as the maximum injection rate and quantity [10]. These injection controls enable a very high injection quantity accuracy and close timings between pilot and main injection that are favorable for reducing nitrogen oxide emissions [9].…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Control Piston Motion and Pressure Inside of a Common Rail Diesel Injector

Schuckert

Wachtmeister

2017

Proceedings ILASS–Europe 2017. 28th Conference on Liquid Atomization and Spray Systems

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In this paper the experimental setup of a commercial third generation common rail solenoid injector with advanced measurement is discussed. The motion of the control piston is measured while performing injection rate investigations using a purpose-built injection rate analyzer of the Bosch type. At the same time fuel pressure in the feed line of the nozzle is gauged and contrasted to fuel pressure before the inlet connector. In contrast to the steady rise observed in a similar study, the motion of the control piston in this case is characterized by a changing gradient in the upward movement. The magnitude of the negative displacement of the upper part of the control piston due to the fuel pressure in the control volume corresponds to simulation results of the elastic deformation. Pressure before the inlet connector and pressure in the feed line exhibit a similar course with a difference in magnitude that is rising with higher rail pressures. Precisely with the end of injection the pressure in the feed line surpasses the pressure before the inlet connector for a short moment. The measurement results of control piston motion and pressure inside the injector are of particular interest because these parameters are to serve as indicators for changes in the injection rate caused by phenomena like wear and coking amongst others.Keywords common rail injector, injection rate measurement, eddy current sensor, control piston motion, feed line pressure IntroductionThe act of injecting diesel not only supplies the fuel for the subsequent combustion, but at the same time also determines the start of combustion with the diesel combustion process. This is unlike the gasoline combustion process, where injection and ignition are separated. Thus, the injection process is a major influence factor to consider in order complying with the increasingly severe emission legislation for compression ignition engines. Furthermore, alterations affecting the injection parameters of common rail diesel injectors that emerge during engine operation have been identified. Research efforts focused on brittle external nozzle deposits mostly consisting of carbon referred to as coking. In recent years, a type of sticky, the so-called internal diesel injector deposits (IDID) have appeared in production engines and caused needles to stick in common rail diesel injectors. It has been observed that the addition of certain additives (polyisobutylene succinimide; PIBSI) to diesel fuel, which are to inhibit the formation of coking deposits, have the side effect of contributing to the formation of IDID [1] [2]. These PIBSI react with acids that emerge from fatty acid methyl ester (FAME), a biodiesel supplement to common diesel in the European Union, to form IDID. Other major factors that influence the occurrence of IDID are high fuel temperatures and the content of aromatics and oxygen in the diesel fuel [2]. Deposits on the nozzle tip and inside the nozzle holes due to coking cause numerous adverse effects. It is proven that this type of deposits exe...

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Development of Diesel Engine using New Fuel Injection System - Direct Monitoring of Fuel Injection Pressure using Injector with Built-in Sensor, and its Applications

Cited by 9 publications

References 0 publications

Systematic Design of Multivariable Fuel Injection Controllers for Advanced Diesel Combustion

Systematic Design of Multivariable Fuel Injection Controllers for Advanced Diesel Combustion

<inline-formula> <tex-math notation="LaTeX">$\mathcal{H}_{\text{2}}$ </tex-math> </inline-formula>-Norm-Based Multi-Pulse Diesel Fuel Injection Control With Minimal Cyclic Combustion Variation

Characteristics of Control Piston Motion and Pressure Inside of a Common Rail Diesel Injector

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