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US 8,555,847 B2Granted
Process for the production of an intake manifold and corresponding manifold
AssigneeSystemes Moteurs (SAS)
InventorsDenis Menin, Arnaud Lambert
Life of this patent
Estimating the term…
Abstract
A intake manifold or splitter for an internal combustion engine and a process for production of same wherein a functional unit, comprised of a shaft with valves attached thereto, is assembled with bearing parts comprising clothespin-like clamps that clamp onto the shaft to form a sub-assembly which is mounted as a unit into receiving housing of the manifold or splitter, wherein a molding or over-molding at is provided at a level of the contact surface of a connection plate to lock the assembly of valves, shaft and bearings into the receiving housings and form sealing formations that seal against gases between the intake manifold or splitter and the internal combustion engine.
Claims27
A process for production of an intake manifold or splitter (1) to be mounted on a cylinder head block of an internal combustion engine, the process comprising:
- providing
- a functional unit, comprised of a shaft (5) with valves (6) attached thereto,
- ii) bearing parts (7) comprising clothespin-like clamps that each comprise two opposing and mutually complementary branches (7′) each with a front end (7″) and a rear end (7′″), each branch (7′) having a recess (10) defining a portion of a rotary bearing, and
- iii) an intake manifold or splitter body (1′) having a plurality of pipes (2) provided with end portions (2′) defining outlet openings attached to at least one connection plate (4) that is configured for mounting said intake manifold or splitter (1) on the cylinder head block of the internal combustion engine, said at least one connection plate (4) defining a contact surface for sealing said intake manifold of splitter (1) with said cylinder head block,
- the intake manifold or splitter body (1′) having, formed in the at least one connection plate (4) between the end portions (2′) of the pipes (2), receiving housings (8) for receiving the functional unit (5, 6) and the bearing parts (7);
- mounting the bearing parts (7) onto shaft segments (5′) of the shaft (5) that extend between the valves (6) of the functional unit by drawing together the opposing branches (7′) of corresponding bearing parts (7) and clamping the shaft segments (5′) inside the recesses (10) of the corresponding bearing parts (7) to form a completed sub-assembly (5, 6, 7);
- installing the completed sub-assembly (5, 6, 7) in the end portions (2′) and the receiving housings (8) of the manifold or splitter body (1′) by introducing said bearing parts (7) into the receiving housings (8) of the at least one connection plate (4), the front ends (7″) of the branches (7′) being located at a bottom of said receiving housing (8);
- and
- implementing a molding or over-molding at a level of the contact surface of the at least one connection plate (4) such that material connected by said molding or over-molding i) causes a mechanical locking of the completed sub-assembly (5, 6, 7) in the receiving housings (8), and ii) constitutes sealing formations (11, 14, 14′) that seal against gases between the end portions (2′) of the pipes (2) and the cylinder head block at the level of the contact surface.
6 more elements
An intake manifold or intake splitter (1) configured to be mounted to a cylinder head block of an internal combustion engine, comprising:
- an intake manifold or splitter body (1′) having a plurality of pipes (2) provided with end portions (2′) defining outlet openings attached to at least one connection plate (4) that is configured for mounting said intake manifold or splitter (1) on the cylinder head block of the internal combustion engine, said at least one connection plate (4) defining a contact surface for sealing said intake manifold or splitter (1) with said cylinder head block;
- a functional unit comprised of a shaft (5) with valves (6) mounted thereto, said valves (6) each being spaced from each other by a shaft segment (5′) of the shaft (5) provided between the valves (6), the functional unit mounted in said end portions of the pipes (2) and in corresponding receiving housings (8) of said at least one connection plate (4);
- bearing parts (7) mounted on the shaft (5) of the functional unit (5, 6) to form guide bearings in rotation of the functional unit (5, 6), the bearing parts (7) having the form of inserts that are mounted in the corresponding receiving housings (8), the bearing parts (7) comprising clothespin-like clamps that each comprise two opposing and mutually complementary branches (7′) each with a front end (7″) and a rear end (7′″), each branch (7′) having a recess (10) defining a portion of a rotary bearing;
- and
- sealing formations (11, 14, 14′) of molded or over-molded material at a level of said contact surface of the at least one connection plate (4), whereby said sealing formations (11, 14, 14′) that are connected by molding or over-molding are configured to provide a mechanical lock of the functional unit (5, 6) and the bearing parts (7) in the respective receiving housings (8), and to seal against gases between the end portions (2′) of the pipes (2) and the cylinder head block at the level of the contact surface,
- wherein said bearing parts (7) are clamped around the shaft segments (5′) such that the shaft segments (5′) are enclosed within the recesses (10) of the bearing parts (7), and
- wherein the front ends (7″) of the branches (7′) are located at a bottom of said respective housings (8).
4 more elements
Dependencies are inferred from the claim text.