JPH02115918U

JPH02115918U -

Info

Publication number: JPH02115918U
Application number: JP2482189U
Authority: JP
Priority date: 1989-03-06
Filing date: 1989-03-06
Publication date: 1990-09-17

Description

[Brief explanation of the drawing]

第１図は本案による２サイクル機関の断面図、
第２図は第１図のＡ−Ａ′線断面図、第３図は制
御弁を駆動する装置の図、第４図は本案による２
サイクル機関の部分断面図、第５図は制御弁を組
み付けたシリンダーライナーの断面図、第６図は
シリンダーブロツク体を下方から見た図である。１は気化器、２はリード弁、３は作動室、４は
掃気通路、５，７は開口部、６は排気通路、８，
８′は制御弁、９，９′は密接片、１０，１０′
は閉鎖面、１１，１１′は整流板、１２はシリン
ダーライナー、１３は円筒又は円錐状に加工され
た面、１４は突起体、１５は通路、１６はシリン
ダーヘツド、１７はシリンダーブロツク体、１８
はクランクケース体、１９はフライウエイト、２
０はシフター、２１はロツド、２２は段差部、Ｇ
はガスケツト、Ｓ，Ｓ′は空間部である。 Figure 1 is a cross-sectional view of the two-cycle engine according to the present invention.
Figure 2 is a sectional view taken along the line A-A' in Figure 1, Figure 3 is a diagram of the device that drives the control valve, and Figure 4 is a sectional view taken along line A-A' in Figure 1.
FIG. 5 is a sectional view of a cylinder liner with a control valve assembled therein, and FIG. 6 is a view of the cylinder block body viewed from below. 1 is a carburetor, 2 is a reed valve, 3 is a working chamber, 4 is a scavenging passage, 5 and 7 are openings, 6 is an exhaust passage, 8,
8' is a control valve, 9, 9' are close pieces, 10, 10'
11 and 11' are closed surfaces, 11 and 11' are rectifying plates, 12 is a cylinder liner, 13 is a cylindrical or conical surface, 14 is a protrusion, 15 is a passage, 16 is a cylinder head, 17 is a cylinder block body, 18
is the crankcase body, 19 is the fly weight, 2
0 is shifter, 21 is rod, 22 is step, G
is a gasket, and S and S' are spaces.

Claims

[Scope of utility model registration request]

In a two-stroke engine having a fluid passage leading to the working chamber of the engine, a control valve integrally provided with a close piece having a close contact part that is in close contact with a side surface of the piston while being in an opening of the fluid passage opening into the working chamber is installed in the cylinder. The control valve is provided in close contact with or in contact with the outer peripheral surface of the liner, and the control valve has a closing surface that covers from behind a predetermined portion of the opening of the fluid passageway that opens into the working chamber while being adjacent to the sealing piece. and by moving the control valve according to conditions such as engine rotational speed, changing the timing at which communication starts between the working chamber and the space on the opposite side of the closed surface with the close contact piece as the boundary, A separation surface that changes the timing at which communication between the fluid passage and the working chamber starts, and is located closer to the crankcase than a position near the end of the opening of the fluid passage that opens into the working chamber, which is closer to the crankcase. a passageway through which a rectifying plate formed in the control valve can pass when a cylinder liner with the control valve assembled thereon is fitted into the cylinder block body; The cylinder block body is formed so as to have a shape, and the outer peripheral surface of the cylinder liner near the separation surface between the crankcase body and the cylinder block body is machined into a cylindrical or conical shape, and the cylinder liner is machined into a cylindrical or conical shape. The cylinder is formed so that the part protruding from the surface does not extend over its entire circumference, and the outer peripheral surface of the cylinder, which is formed in a cylindrical or conical shape, is configured to be strongly contacted and supported by the cylinder block body. A two-cycle engine featuring: