Cylinder block and method of fabrication thereof
AssigneePerkins Engines Company Limited
InventorHoward J. Lawrence
Life of this patent
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Abstract
A method for fabricating a cylinder block for an internal combustion engine and a cylinder block manufactured in accordance with the method are described in which a cylinder core (1) including one or more cylinder (6) is manufactured by casting, for example from steel or light alloy; the remainder of the cylinder block structure is manufactured as a wrought framework (2), for example in high strength low allow steel or light alloy; and the wrought framework (2) is joined to the core (1).
Claims33
A method for fabricating a cylinder block for an internal combustion engine comprising the following steps:
- a cylinder core including one or more cylinders is manufactured by casting;
- the remainder of the cylinder block structure is manufactured as a wrought framework;
- and
- the wrought framework is joined to the already cast core;
- including the further step of attaching enclosure panels to the cylinder block to form an enclosed structure.
A method in accordance with any preceding claim wherein the wrought framework is joined to the cast core by a process selected from welding, adhesive bonding and process brazing.
A method for fabricating a cylinder block for an internal combustion engine comprising the following steps:
- a cylinder core including one or more cylinders is manufactured by casting;
- the remainder of the cylinder block structure is manufactured as a wrought framework;
- and
- the wrought framework is joined to the already cast core;
- wherein stiffening rails are attached to the fabricated framework to increase the stiffness and frequency mode of the cylinder block apparatus.
A cylinder block for an Internal combustion engine comprising a cast cylinder core including one or more cylinders, a wrought cylinder block framework comprising substantially the remainder of the cylinder block which is joined to the already cast core, and enclosure panels attached to the cylinder block to form an enclosed structure.
A cylinder block for an internal combustion engine comprising a cast cylinder core including one or more cylinders, and a wrought cylinder block framework comprising substantially the remainder of the cylinder block which is joined to the already cast core;
- wherein the fabricated framework includes stiffening rails to increase the stiffness and frequency mode of the cylinder block apparatus, which stiffening rails are preloaded to resist distorting forces by the application of plastic deformation in situ.
A method for fabricating a cylinder block for an internal combustion engine comprising the following:
- casting a cylinder core including one or more cylinders;
- joining at least one open framework structure to the cylinder core after the casting of the cylinder core, the open framework structure being manufactured by a wrought process;
- joining at least one enclosure panel to the at least one open framework structure;
- and
- attaching stiffening rails to the at least one open framework structure.
Dependencies are inferred from the claim text.