Cylinder head gasket with one-way coolant flow valve

F - Mech Eng,Light,Heat,Weapons – 02 – F

Patent

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Details

F02F 1/36 (2006.01) F02B 75/18 (2006.01)

Patent

CA 2568334

A head gasket (48) which acts, when clamped between a cylinder head (28) and a block (22) in a liquid cooled internal combustion engine (20), to form a seal around the combustion chambers (24). A coolant flow path (32) routes through the engine (20) and its directed, in part, through the cylinder head (28) and the block (22), with a corresponding flow opening (54) formed in the head gasket (48) to accommodate flow of liquid coolant in a normal direction. The head gasket (48) includes a one-way valve (58) positioned in the flow opening (54) to allow the flow of coolant in a normal direction but to prevent the flow of liquid coolant through the flow opening (54) in an abnormal, reverse direction. The one-way valve (58) includes movable gate (66) which may be biased against a valve seat (64) in a normally closed condition. The one-way valve (58) can be made as a loose piece article of manufacture which is held in flow opening (54) by self-locking retention clips.

La présente invention concerne un joint de culasse (48) qui agit, lorsqu'il est serré entre une culasse (28) et un bloc (22) dans un moteur à combustion interne à refroidissement par liquide de refroidissement (20), de manière à former un joint autour des chambres de combustion (24). Une voie d'écoulement de liquide de refroidissement (32) traverse le moteur (20) et est dirigée en partie à travers la culasse (28) et le bloc (22). Une ouverture d'écoulement correspondante (54) ménagée dans le joint de culasse (48) permet de recevoir l'écoulement de liquide de refroidissement dans une direction normale. Le joint de culasse (48) comprend une vanne unidirectionnelle (58) qui est placée dans l'ouverture d'écoulement (54) afin de permettre l'écoulement du liquide de refroidissement dans une direction normale, mais d'empêcher l'écoulement de liquide de refroidissement à travers l'ouverture d'écoulement (54) dans une direction inverse, qui n'est pas normale. Cette vanne unidirectionnelle (58) comprend une porte mobile (66) qui peut être contrainte contre un siège de vanne (64) dans un état normalement fermé. La vanne unidirectionnelle (58) peut être fabriquée sous forme de produit manufacturé mobile qui est maintenu dans l'ouverture d'écoulement (54) par des clips de retenue autobloquants.

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