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2. 发明专利

DE2605845A1 未知
公开(公告)号：DE2605845A1
公开(公告)日：1976-10-07
申请号：DE2605845
申请日：1976-02-13
申请人： YOSHIKAWA MASAZI , SAWADA TOMOE , MURATA MANUFACTURING CO
发明人： YOSHIKAWA MASAZI , SAWADA TOMOE
IPC分类号： H01T13/05 , H01T13/06 , H01T13/04
摘要： 1513333 Sparking plug cap MURATA MFG CO LTD M YOSHIKAWA and SAWADA 13 Feb 1976 13 Feb 1975 15 May 1975 17 May 1975 12 June 1975] 05841/76 Heading H2E A sparking plug cap comprises an insulating body with at least one capacitor supported within the body and electrically connected in parallel to the spark gap of the plug. The capacitor is said to intensify the spark in the gap. In an embodiment a cap 32 having a body 34 of fibre reinforced plastics, silicone rubber or ceramics has a terminal 36 and a slotted annular connector 38. A capacitor 50 is connected to lead 48 of the cap and via an outer conductor lead 54 to the metal shield 22 of the sparking plug 20. In some embodiments, the cap body 34 is a solid insulator with either the capacitor buried directly therein (Figures 8 and 10, not shown) or in a cavity filled with epoxy resin (60, Figures 4, 7 and 9, not shown). Instead of an annular connector 38 to ground the capacitor, some embodiments use a spring (56, Figures 3 to 11, not shown) the spring also acts as a heat dissipator to protect the cap 32. The H.T. lead 40 may be joined directly to the cap rather than by terminal 36 (Figures 7 to 10). A plurality of capacitors may be used (Figure 10) and instead of a flat capacitor, one having a cylindrical dielectric with the electrodes on the upper and lower surfaces (90a, 90b, Figures 11 and 12, not shown) may be used. A resilient sleeve (64, Figure 6) may be provided at the bottom of the cap to grip the top of the sparking plug and prevent ingress of dust and moisture, while an insulating sleeve (102, Figure 11) may be placed around the cap body. In one embodiment (Figure 9) the capacitor is grounded via a conductive ring (70) and leaf springs (68) which directly contact the engine block.

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