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US 4,539,954 AGranted
Selective asymmetric swirl intake port
AssigneeGeneral Motors Corporation
InventorEdward D. Klomp
Life of this patent
Estimating the term…
Abstract
Cylinder intake charge swirl is accentuated by selectively directing flow past swirl generating vanes in the intake port which are closest to the cylinder wall and reducing the flow past swirl generating vanes furthest from the cylinder wall. This may be accomplished by utilizing asymmetrically variable swirl vanes arranged to reduce flow at lower engine loads through passages furthest from the cylinder wall and encourage flow through swirl directed passages closer to the cylinder wall.
Claims4
The combination in an internal combustion engine of
- a cylinder having a peripheral wall and a closed end,
- means defining an intake port opening to the cylinder through the closed end, the port having an end portion adjacent to the cylinder with an edge near the peripheral wall,
- a poppet valve in the port reciprocably supported by the port defining means and engageable with the port defining means near the cylinder closed end for movement of the valve into open and closed positions to open and close communication between the port and the cylinder, and
- adjustable swirl means in said port end portion, said swirl means comprising a plurality of adjustable vanes supported in annularly spaced relation around said valve in said port end portion and extending in directions generally outwardly from the valve and longitudinally along the direction of flow through the port end portion and
- adjusting means to selectively adjust said vanes between open and flow restricting positions, said adjusting means providing sequential opening of at least certain of the vanes to impart varying degrees of swirl to fluid charges entering the cylinder through the intake port.
2 more elements
The combination in an internal combustion engine of
- a cylinder having a peripheral wall and a closed end,
- means defining an intake port opening to the cylinder through the closed end, the port having an end portion adjacent to the cylinder with an edge near the peripheral wall,
- a poppet valve in the port having a head engageable with the port defining means near the cylinder closed end to close communication between the port and the cylinder and a stem connected with the head and extending centrally of the port end portion, the stem being reciprocably supported by the port defining means for movement of the valve longitudinally of the stem into open and closed positions, and
- adjustable swirl means in said port end portion adjacent to the valve head, said swirl means comprising a plurality of adjustable vanes supported in annularly spaced relation around said valve stem in said port end portion and extending in directions generally outwardly from the valve stem and longitudinally along the direction of flow through the port end portion and
- adjusting means to selectively adjust said vanes between open and flow restricting positions, said adjusting means providing sequential opening of at least certain of the vanes to swirl inducing positions to impart varying degrees of swirl to fluid charges entering the cylinder through the intake port.
2 more elements
Dependencies are inferred from the claim text.