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ORBITAL CORP LTD Message Board

  • tthorp2003 tthorp2003 Apr 23, 2012 7:14 PM Flag

    Honda may not be Dead yet!

    Look at fig 5a, this and the corresponding text was added on 14/3/2012. It adds a cavity in the top of the piston.

    "
    Bibliographic data: MY136756 (A) ― 2008-11-28
    GASOLINE DIRECT INJECTION INTERNAL COMBUSTION ENGINE

    Page bookmark MY136756 (A) - GASOLINE DIRECT INJECTION INTERNAL COMBUSTION ENGINE
    Inventor(s): HANAWA KAORU [JP]; UEDA HIROYA [JP]; ISHIDA SHUICHI [JP] +
    Applicant(s): HONDA MOTOR CO LTD [JP]; ORBITAL AUSTRALIA PTY LTD [AU] +
    Classification: - international: F02B23/10; F02B61/02; F02B75/16; F02F1/24; F02F1/42; F02F3/28; F02M61/14; F02M67/02; F02B75/12
    - European: F02B23/10C; F02B61/02; F02B75/16; F02F1/42B

    Application number: MYPI20040178 20040121
    Priority number(s): JP20030024446 20030131
    Also published as: EP1589201 (A1) EP1589201 (A4) WO2004067928 (A1) JP2004263570 (A) CN1745232 (A) more



    Abstract of MY136756 (A)

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    [PROBLEM] IN A GASOLINE DIRECT INJECTION INTERNAL COMBUSTION ENGINE, TO ACHIEVE IMPROVEMENT OF FUEL EFFICIENCY AND EXHAUST EMISSION BY PREVENTING OR CONTROLLING DIFFUSION AND SEPARATION OF AIR-FUEL MIXTURE DUE TO SQUISH.[MEANS FOR RESOLUTION] A FUEL INJECTION VALVE 60 OF THE GASOLINE DIRECT INJECTION INTERNAL COMBUSTION ENGINE INJECTS AIR-FUEL MIXTURE SO THAT THE OUTER PERIPHERY 63a OF THE INJECTION FLOW 65 FALLS INTO A CAVITY 51 OF A PISTON DURING COMPRESSION STROKE.BY THE COOPERATION OF A SQUISH AREA 54 FORMED ON THE PERIPHERAL PORTION 53 OF THE PISTON 5 AND A SQUISH AREA 34 FORMED UNDER THE CEILING SURFACE 30 OF A CYLINDER HEAD 3, WHICH DEFINES A COMBUSTION CHAMBER 8 , AN OBLIQUE SQUISH 20 DIRECTED UPWARD TOWARD THE INJECTION CENTERLINE ON THE PERIPHERAL PORTION 53 AND FLOWS ALONG AN OPPOSED PORTION 30A OF THE CEILING SURFACE 30, WHICH IS LOCATED UPWARDLY OF THE OPENING OF THE CAVTY 51 AND OPPOSES THE SAME IS GENERATED.


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    Last updated: 14.03.2012
    Worldwide Database
    5.7.38; 92p

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    • Tom, did you see a diagram? As I have understood Squish bands in motorcycles, the combustion chamber in the cylinder head is sloped downward toward the outside edge of the cylinder. The outside edge of the cylinder head combustion chamber is nearly touching the outside edge of the piston as it reaches top-dead-center. As the piston rises, the air/fuel mixture at outward edges of the cylinder are displaced first, and this causes a rolling motion from the outside edge toward the center of the piston as the piston rises. The rolling motion creates a better mixing of the fuel and air as it moves toward the spark plug in the center of the cylinder.
      This is not easy to describe, so it might be more clear if you draw a cylinder with the piston at the very top. Then draw a gently sloping triangle on top of the cylinder to represent the combustion chamber. The spark plug would be at the top point of the triangle. Presumably the cavity in the piston would be at the center, beneath the spark plug.
      Now the 64-million dollar question....why did you say Honda may not be dead yet?

      • 1 Reply to genetuck
      • OK, now I see the diagram....on the OEC board. It would help if they had put in all the numbers mentioned in the text description. My only guess at this point is that the squish angles were put in to push the air toward the center, from all sides, and thus keep the fuel/air mixture in the center as the piston rises toward the spark plug.
        I also saw why you said Honda may not be dead yet, as this is the same Orbital engine that Honda has been working on for more than ten years.

 
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