Rotational angle based pressure control of a common rail fuel injection system for internal combustion engines

Zhen Zhang, Zongxuan Sun

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Scopus citations

Abstract

Common rail based direct injection system is critical for improving the fuel economy and emissions of both gasoline and diesel engines. The fuel pressure pulsation inside the common rail is induced by high-speed flows in and out of the common rail. This phenomenon could adversely affect the accuracy of injected fuel quantities and flow rates. So it is desirable to compensate for the pressure pulsations in a high pressure fuel injection system. Due to the stroke by stroke motion of the internal combustion engine, the fuel pressure pulsation is primarily periodic with respect to the engine rotational-angle since fuel injection timing is scheduled on an angular basis. However, the period of the pressure pulsation changes in time domain as the rotational speed varies in general. To compensate for the pressure pulsations, current control practice is to throttle the fuel through an electro-hydraulic valve, which not only results in energy loss but also has limited effect due to the bandwidth of the valve and the control. In this paper, we apply recently developed time-varying internal model-based design to compensate for the time-varying but angle dependent pressure pulsations.

Original languageEnglish (US)
Title of host publication2009 American Control Conference, ACC 2009
Pages2690-2695
Number of pages6
DOIs
StatePublished - Nov 23 2009
Event2009 American Control Conference, ACC 2009 - St. Louis, MO, United States
Duration: Jun 10 2009Jun 12 2009

Other

Other2009 American Control Conference, ACC 2009
CountryUnited States
CitySt. Louis, MO
Period6/10/096/12/09

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