Orbital Revises Patent to Add Cylinder De-Activation under Low- Load Conditions.
Bibliographic data: WO2012000029 (A1) ? 2012-01-05 METHOD OF INJECTING FUEL INTO AN ENGINE
Page bookmark WO2012000029 (A1) - METHOD OF INJECTING FUEL INTO AN ENGINE Inventor(s): COPLIN NICHOLAS [AU]; CATHCART GEOFFREY PAUL [AU] + Applicant(s): ORBITAL AUSTRALIA PTY LTD [AU]; COPLIN NICHOLAS [AU]; CATHCART GEOFFREY PAUL [AU] + Classification: - international: F02M69/52 - European:
Application number: WO2011AU00798 20110630 Priority number(s): AU20100902920 20100701 Also published as: WO2012000029 (A8)
Abstract of WO2012000029 (A1)
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A method of operation of a dual fluid fuel injection system arranged to supply fuel to a cylinder of an internal combustion engine, the dual fluid fuel injection system being controllable to effect fuel metering events and fuel delivery events. The method comprises operating the dual fluid fuel injection system so as to have at least one fuel delivery event during each engine cycle and to have fewer than one fuel metering event, on average, per engine cycle. An electronic control unit for implementing the method is also described. The method and control unit allow dynamic range of a fuel metering injector, where included within the dual fluid fuel injection system, to be extended.
Sitemap Accessibility Legal notice Terms of use Last updated: 14.03.2012 Worldwide Database 5.7.38; 92p
Claims: WO2012000029 (A1) ? 2012-01-05 METHOD OF INJECTING FUEL INTO AN ENGINE Claims of WO2012000029 (A1) Translate this text into Tooltip > Claims tree
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CLAIMS: 1 . A method of operation of a dual fluid fuel injection system arranged to supply fuel to a cylinder of an internal combustion engine, the dual fluid fuel injection system being controllable to effect fuel metering events and fuel delivery events, the method comprising operating the dual fluid fuel injection system so as to have at least one fuel delivery event during each engine cycle and to have fewer than one fuel metering event, on average, per engine cycle. 2. The method according to claim 1 being implemented for low engine load /speed and high engine load/speed engine operating conditions. 3. The method according to claim 1 or 2 wherein a single fuel metering event provides fuel for a plurality of engine cycles. 4. The method of claim 3 wherein relative length of fuel delivery events is controlled to apportion quantity of fuel delivered to a cylinder, preferably as equally as possible, between successive engine cycles. 5. The method according to claim 4 wherein an electronic control unit (ECU) uses maps for controlling operation of said dual fluid injection system and where difference in quantity of fuel delivered to a cylinder in fuel delivery events over two successive engine cycles exceeds a predetermined value, said ECU operates the engine using a different map for each successive engine cycle. 6. The method according to claim 5 wherein said ECU recalculates a map for controlling operation of said dual fluid injection system each said successive engine cycle. 7. The method according to claim 3 wherein differing quantities of fuel are delivered through fuel delivery events over successive engine cycles under the same engine operating conditions. 8. The method of any one of claims 3 to 7 wherein said engine is operated under low load engine operating conditions. 9. The method according to any one of the preceding claims wherein a single fuel metering event extends for a plurality of engine cycles overlapping with fuel delivery events occurring during said plurality of engine cycles. 10. The method of claim 9 wherein said fuel metering event extends for a plurality of engine cycles during periods of high engine load. 1 1 . The method of claim 9 or 10 wherein said fuel metering event has indefinite duration. 12. An electronic control unit (ECU) for controlling a dual fluid fuel injection system to effect fuel metering events and fuel delivery events, the control unit being configured with maps for controlling operation of the dual fluid fuel injection system so as to have at least one fuel delivery event during each engine cycle and to have fewer than one fuel metering event, on average, per engine cycle. 13. The electronic control unit (ECU) of claim 12 wherein said ECU controls the engine using a different map for each successive engine cycle where difference in quantity of fuel delivered to a cylinder in fuel delivery events over two successive engine cycles exceeds a predetermined value, said. 14. The electronic control unit of claim 12 or 13 wherein said ECU recalculates a map for controlling operation of said dual fluid injection system each said successive engine cycle.
Sitemap Accessibility Legal notice Terms of use Last updated: 14.03.2012 Worldwide Database 5.7.38; 92p
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