JPS6259708U

JPS6259708U -

Info

Publication number: JPS6259708U
Application number: JP15152285U
Authority: JP
Priority date: 1985-10-04
Filing date: 1985-10-04
Publication date: 1987-04-14

Description

[Brief explanation of the drawing]

第１図は本考案の第１実施例に係る可変バルブ
タイミングリフト装置の縦断面図、第２図は第１
図の装置の拡大部分縦断面図、第３図は第１図の
―線に沿う拡大部分横断面図、第４図は第１
図の装置のカム回転角とバルブリフト量との関係
図、第５図は第１図の装置における吸、排気バル
ブ開のオーバラツプ状態を示す特性図、第６図は
本考案の第２実施例に係る可変バルブタイミング
リフト装置の縦断面図、である。１……シリンダヘツド、２……ポペツト弁、３
……ポート、４……バルブスプリング、６……カ
ム、７，３０……可変バルブリフト装置としての
バルブリフタ、８，３１……第１の部材としての
インナリフタ、９，３２……第２の部材としての
アウタリフタ、８ａ，９ａ……対向面、１０，３
３……コマ、１１……油圧通路、１２……油圧室
、１３……ピストン、１６……油圧ポンプ、１７
，１９……開閉弁、１８……逆止弁。 FIG. 1 is a vertical sectional view of a variable valve timing lift device according to a first embodiment of the present invention, and FIG.
FIG. 3 is an enlarged partial cross-sectional view taken along line - in FIG. 1, and FIG.
Fig. 5 is a characteristic diagram showing the overlapping state of intake and exhaust valve openings in the device shown in Fig. 1, and Fig. 6 is a second embodiment of the present invention. FIG. 2 is a longitudinal cross-sectional view of the variable valve timing lift device according to the invention. 1...Cylinder head, 2...Poppet valve, 3
... Port, 4 ... Valve spring, 6 ... Cam, 7, 30 ... Valve lifter as a variable valve lift device, 8, 31 ... Inner lifter as first member, 9, 32 ... Second member Outer lifter as 8a, 9a...opposite surface, 10, 3
3... Top, 11... Hydraulic passage, 12... Hydraulic chamber, 13... Piston, 16... Hydraulic pump, 17
, 19...Opening/closing valve, 18...Check valve.

Claims

[Claims for Utility Model Registration] (1) In a valve mechanism that converts the rotational motion of a cam into a reciprocating motion for opening and closing a valve, a variable valve lift amount can be adjusted by adjusting the dimension in the direction of the reciprocating motion. In a variable valve timing lift device incorporating a valve lift device, the variable valve lift device is connected to a first member that can approach and separate from each other in the reciprocating direction, and at least one of opposing surfaces is formed as an inclined surface. and a second member, and a top that is interposed between the first member and the second member, contacts opposing surfaces of both members, and is movable in a radial direction with respect to the central axis of the reciprocating motion. The variable valve timing lift device is further characterized in that a hydraulic passage is connected between the first member and the second member to guide hydraulic pressure for pressing and moving the top in the radial direction. (2) The variable valve timing lift device according to claim 1, wherein the variable valve lift device is a valve lifter interposed between a valve head and a cam of a direct valve engine.