(19)
(11) EP 1 808 597 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
01.04.2009 Bulletin 2009/14

(43) Date of publication A2:
18.07.2007 Bulletin 2007/29

(21) Application number: 07100140.8

(22) Date of filing: 05.01.2007
(51) International Patent Classification (IPC): 
F02M 61/14(2006.01)
F01L 1/04(2006.01)
 F02F 1/24(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK RS

(30) Priority: 13.01.2006 JP 2006006462

(71) Applicants:
  • Mazda Motor Corporation
    Aki-gun, Hiroshima 730-8670 (JP)
  • Kokoku Intech Co., Ltd
    Taito-Ku, Tokyo 110-0015 (JP)

(72) Inventors:
  • Iso, Naohide
    Hyogo Saitama 652-0811 (JP)
  • Takahara, Kazuhiro
    Saitama Saitama 362-0806 (JP)
  • Kodama, Hiroshi
    Aki-gun, 730-8670 Hiroshima Hiroshima (JP)
  • Ishimoto, Daijiro
    Aki-gun, 730-8670 Hiroshima Hiroshima (JP)

(74) Representative: Laufhütte, Dieter 
Lorenz-Seidler-Gossel Widenmayerstrasse 23
80538 München
80538 München (DE)

   


(54) Cylinder head structure for direct-injection diesel engine


(57) The peripheral region (10a) of each injector hole (14) in the top surface of a cylinder head (10) and the peripheral region (20a) of an associated insertion hole (injector insertion hole) (24) in the bottom surface of a cam holder (20) face each other with an annular clearance (5) left therebetween and a seal (60) is disposed between the insertion hole (24) and an associated injector (40). The seal (60) includes a seal body (61) and first to third sealing parts (62-64). The first sealing part (62) is engaged against the injector (40), the second sealing part (63) protrudes downward beyond the insertion hole (24) and is engaged against the peripheral region (10a) of the injector hole (14), and the third sealing part (64) is expanded in diameter and engaged against the inner periphery of the insertion hole (24) by compressively deforming the second sealing part (63).







Search report