A Finite Difference Scheme for the Simulation of a Fuel Injection System

Kumar, Kundan; Gaur, Ruchi; Garg, Ruchi; Babu, M. K. Gajendra

doi:10.4271/831337

Cited by 22 publications

(5 citation statements)

References 17 publications

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“…Die Verwendung dieser EflFektivwerte bereitet beim Gradientenverfahren keinerlei Probleme. Beim Trennverfahren aber kann nun nicht mehr davon ausgegangen werden, daß die Bedingung (11) …”

Section: At 7/96unclassified

See 1 more Smart Citation

Modellbasierte Schätzung der Einspritzmenge bei Dieselmotoren

Sage¹,

Riesenberg²,

Kiencke³

1996

at - Automatisierungstechnik

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“…Die Verwendung dieser EflFektivwerte bereitet beim Gradientenverfahren keinerlei Probleme. Beim Trennverfahren aber kann nun nicht mehr davon ausgegangen werden, daß die Bedingung (11) …”

Section: At 7/96unclassified

“…Wie in [11] gezeigt, liefert eine numerische Lösung von (1) und (2) für die hier betrachteten Vorgänge nahezu identische Ergebnisse. Für (2) ist eine analytische Lösung bekannt; nach z.B.…”

Section: Introductionunclassified

Modellbasierte Schätzung der Einspritzmenge bei Dieselmotoren

Sage¹,

Riesenberg²,

Kiencke³

1996

at - Automatisierungstechnik

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“…Mass transport in this medium is characterized by propagation of a pressure wave between the pumping chamber and the injector nozzle. Computer simulation of the injection pump hydraulics using finite difference methods is often relied upon to predict the delivered quantity and injection characteristics [0ren83, Kumar83,Shanna83].…”

Section: �---mentioning

confidence: 99%

An Indirect Sensing Technique for Closed-Loop Diesel Fuel Quantity Control

MacCarley

Clark

Nakae

1990

SAE Technical Paper Series

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Despite significant advances in electronic control technology applied to diesel engines, commercially available injection sys tems for automotive diesel engines remain limited by the open loop mapplng of the injection pump. An initial calibration is relied upon to translate a fuel delivery command to an actual fuel quantity. In practice, however, these two variables may be sub stantially different due to the effects of mechanical wear, repair, and the wide range of operating conditions. Possible ramifications of this discrepancy are excessive exhaust smoke due to overfuel ing, increased fuel consumption, degraded driveability, and poor idle characteristics. The major obstacle to closing the fuel control loop is the lack of a suitable sensor for instantaneous fuel delivery from the injector. An indirect fuel delivery sensing mechanism based upon the use of the injector nee dle lift in conjunction with the fuel tempera ture is evaluated. An estimation of the injection rate characteristic is determined from real-time analysis of the needle lift signal using a high-spee d sensor processor. Integration of the rate characteris tic and temperature correction yields a total mass delivery estimate for use as a feedback quantity for closed-loop fuel control. Signal processing algorithms are derived from computer modeling of the injector and verifi ed experimentally. Possible long-term decalibra tion due to nozzle coking is studied. Advantages and limitations of the technique are identified. BACKGROUND AND PROBLEM DESCRIPTION Although diesel engines and lnjection systems represent a mature technology, it is only ln recent years that electronic con trols have been successfull y applied. The majority of diesel appli cations are still mechanicall y controlled, with no electronics involved other than the fuel shutoff solenoid valve control. The potential benefits of microprocessor-based control applied to diesel engines have been well established [Reams82, Kihara83, Martlnsons82, Trenne82, Kawai84]. However, many of the improvements made possible by advanced electronic control

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“…Recently, much e!ort has been devoted to studies of the #ow inside an injector and to development of computer models to predict the dynamic responses of an injection system. For example, Becchi [4], Goyal [5], Kumar et al [6], Sobel et al [7], Krepec et al [8], and Ziejewski et al [9] used numerical techniques to simulate the pump}line}nozzle injection systems for diesel engines.…”

Section: Introductionmentioning

confidence: 99%