Internal combustion engine inlet manifold
AssigneeAustin Rover Group Limited
InventorT. Graham Parr
Life of this patent
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Abstract
An internal combustion engine inlet manifold is disclosed which comprises of a housing defining a plenum, at least one inlet tract and at least one rotary valve member supported by the housing. The or each inlet tract has first and second lengths one of which extends away from the plenum for connection to an engine to which the inlet manifold is to be connected. The or each valve member is arranged to be rotatable from a first position in which the first and second lengths are connected in series between the plenum and the engine via the or each valve member and a second position in which connection is made between the plenum and the engine solely by means of the first length of the or each inlet tract via the or each valve member.
Claims17
An internal combustion engine inlet manifold comprising:
- a housing defining a plenum, at least one valve chamber, inlet means to connect each of said valve chambers directly to the plenum and at least one inlet tract;
- the or each inlet tract having a first length extending from a respective one of said valve chambers for connection to an engine to which the inlet manifold is connected in use and a second length extending from the respective valve chamber to the plenum;
- a like number of plastic rotary valve members as there are inlet tracts, each valve member having a transverse duct defined therein and being rotatably supported by the housing within a respective valve chamber,
- the arrangement being such that the length of each inlet tract is changeable by rotation of the or each valve member from a first position in which the first and second lengths are connected in series between the plenum and the engine via the respective transverse duct of the valve member associated therewith to a second position in which each of the first lengths is connected via a respective inlet means to the plenum via the respective transverse duct of the valve member associated therewith.
Dependencies are inferred from the claim text.