(1) The Exhaust Manifold gasket pressure is mainly concentrated in the area around the ribs and bolt holes. In the area of the gasket body, the contact pressure is very small, approximately zero. From this, it can be considered that the sealing function of the gasket is mainly realized by the ribs, and the sealing performance is guaranteed by the pressure characteristics of the ribs. In the following sealing analysis, the main focus is on the contact state in the bead area.
(2) Under assembly conditions, the contact pressure distribution of the ribs is uniform and the value is large, and the sealing performance is good; under the full-load hot state, the pressure distribution of the ribs is uneven, and the contact pressure drops significantly, which is a dangerous working condition for the sealing performance; The contact pressure and uniformity of distribution in the case are between assembled and full load, and the current design is closer to the installed state.
(3) In the most dangerous high-speed and full-load conditions, the sealing pressure in the central area of the gasket drops significantly, the pressure at both ends increases greatly, and the specific gravity of the sealing pressure load transmitted through the ribs decreases, which is not good for sealing.
Under the high-speed full-load thermal state, due to uneven thermal expansion and cold contraction, the expansion of the air passage outside the manifold is large, and the expansion of the air passage in the middle is small, resulting in the deformation of the sealing surface into a bow shape, and the central part of the manifold has a tendency to separate from the cylinder head. . This tendency to separate greatly reduces the amount of compression of the gasket bead, thereby reducing the sealing pressure.
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|Part name:||Exhaust Manifold Gasket|
|Feature:||Genuine & Brand New|
|Stock situation:||20 pieces in stock;|
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