Inlet manifold for V-configuration internal combustion engines
AssigneeAustin Rover Group Limited
InventorGraham E. Atkin
Life of this patent
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Abstract
An inlet manifold 7 for both banks of cylinders of a V-configuration internal combustion engine has two different lengths of tuned inlet passage between a plenum 14 and an inlet valve 3. A first length extends from an opening 13a in one face (in this case the upper) of the plenum 14. A second length extends the first length when valve 13 closes the opening 13a, passes along passage 16 around the side of the plenum remote from the cylinder 2, and communicates with the other face (in this case the lower) via an opening 18. It is possible to construct such a manifold in three parts: a plastics moulding 10 defining the plenum 14; two metal pressings 8, 9 which engage each other; and a third metal pressing 11. Such a construction can be cheaper and lighter than hitherto.
Claims13
An inlet manifold for a V-configuration internal combustion engine, comprising:
- a plenum extending approximately parallel to the axis of the crankshaft;
- a first length of inlet passage from the plenum to the intake of each cylinder, said first length extending from a first face of the plenum to the intake of each cylinder to provide a first tuned length of inlet passage;
- a valve for each first length of each inlet passage, which valve can be opened so that each first length of each inlet passage communicates with the plenum;
- a second length of inlet passage from the plenum to each cylinder, which second length is partially coextensive with the first length in communication therewith upstream of said valve, the second length extending around a side of the plenum remote from the respective cylinder and which communicates with a second face of the plenum to provide a second tuned length of each inlet passage which is also greater in length than said first passage, said second plenum face being opposed of said first plenum face and spaced therefrom in a direction extending radially from said crankshaft axis so as to be closer to said axis than said first plenum face.
Dependencies are inferred from the claim text.