Abstract: Adding dome-shaped protuberances, or polydomes, to an engine system increases the structural integrity of the engine component to which they are added and allows noise radiated in the engine system to be reduced in certain regions of the frequency spectrum without incurring a significant increase in the mass of the engine part to which they are added, which may result in a longer solidification time during the mold injection process. The size and spatial arrangement of polydomes relative to one another can be further adjusted to reduce noise within the engine system and polydomes may be reinforced with ribs to increase the structural stiffness of plastic engine components. Because plastic engine components are created using an injection mold process during the manufacturing process, added surface features (e.g. polydomes and ribs) are continuous with the underlying planar surface to which they are added.

Abstract: Systems are disclosed to restrain movement of engine components in the event of a collision. A system may comprise an upper intake manifold; a cam cover; a shear catch located between the upper intake manifold and the cam cover; an upper component of the shear catch is arranged on the upper intake manifold; a lower component of the shear catch is arranged on the cam cover; and the upper component and the lower component are arranged opposite each other such that they engage when the upper intake manifold is subjected to shear forces. Variations to the size, arrangement, and shape of a shear catch are disclosed herein.

Abstract: Systems are disclosed to restrain movement of engine components in the event of a collision. A system may comprise an upper intake manifold; a cam cover; a shear catch located between the upper intake manifold and the cam cover; an upper component of the shear catch is arranged on the upper intake manifold; a lower component of the shear catch is arranged on the cam cover; and the upper component and the lower component are arranged opposite each other such that they engage when the upper intake manifold is subjected to shear forces. Variations to the size, arrangement, and shape of a shear catch are disclosed herein.

Abstract: Systems are disclosed to restrain movement of engine components in the event of a collision. A system may comprise an upper intake manifold; a cam cover; a shear catch located between the upper intake manifold and the cam cover; an upper component of the shear catch is arranged on the upper intake manifold; a lower component of the shear catch is arranged on the cam cover; and the upper component and the lower component are arranged opposite each other such that they engage when the upper intake manifold is subjected to shear forces. Variations to the size, arrangement, and shape of a shear catch are disclosed herein.

Abstract: Systems are disclosed to restrain movement of engine components in the event of a collision. A system may comprise an upper intake manifold; a cam cover; a shear catch located between the upper intake manifold and the cam cover; an upper component of the shear catch is arranged on the upper intake manifold; a lower component of the shear catch is arranged on the cam cover; and the upper component and the lower component are arranged opposite each other such that they engage when the upper intake manifold is subjected to shear forces. Variations to the size, arrangement, and shape of a shear catch are disclosed herein.

Abstract: Adding dome-shaped protuberances, or polydomes, to an engine system increases the structural integrity of the engine component to which they are added and allows noise radiated in the engine system to be reduced in certain regions of the frequency spectrum without incurring a significant increase in the mass of the engine part to which they are added, which may result in a longer solidification time during the mold injection process. The size and spatial arrangement of polydomes relative to one another can be further adjusted to reduce noise within the engine system and polydomes may be reinforced with ribs to increase the structural stiffness of plastic engine components. Because plastic engine components are created using an injection mold process during the manufacturing process, added surface features (e.g. polydomes and ribs) are continuous with the underlying planar surface to which they are added.