Method for manufacturing cylinder block for internal combustion engine
AssigneeSuzuki Motor Corporation
InventorsTatsuo Nishihara, Ryo Yamauchi
Life of this patent
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Abstract
A method for manufacturing a cylinder block provides an abrasion-resistant layer in a cylinder bore by build-up welding. The method applies build-up welding to preformed recesses along an inner surface of the cylinder bore. After build-up welding, final finishing provides a finished bore surface. The method creates an abrasion-resistant surface in areas prone to piston abrasion and manages welding strain to minimize cylinder block distortion.
Claims17
A method for manufacturing a cylinder block of an internal combustion engine, comprising the steps of:
- defining a set of parameters for said cylinder block including at least an abrasion resistance layer thickness, a desired welding strain, a first finished bore dimension, a thrust direction, and an anti-thrust direction;
- forming a cylinder block matching said set of parameters;
- designating at least a first and a second build-up welding portion along a bore of said cylinder block corresponding to said thrust and said anti-thrust directions;
- performing build-up welding in said first and said second build-up welding portions;
- and
- final finishing said cylinder block to said first finished bore dimension, whereby a surface of said bore retains an abrasion resistant layer having said abrasion resistance layer thickness and said desired welding strain along said thrust and anti-thrust directions.
A method for manufacturing a cylinder block of an internal combustion engine, comprising the steps of:
- providing a preformed cylinder block having a least one preformed build-up welding portion along a cylinder bore matching at least a thrust direction;
- performing build-up welding in said at least one preformed build-up welding portion;
- and
- finishing said cylinder bore to a final form, whereby said surface of said cylinder bore is abrasion resistant in at least said thrust direction during operation of said internal combustion engine.
A method of manufacturing a cylinder block of an internal combustion engine, comprising the steps of:
- determining a set of parameters for said cylinder block, said set of parameters including at least a desired abrasion resistance layer thickness, a desired welding strain, a desired first finished bore diameter, a thrust direction, and an anti-thrust direction;
- forming a cylinder block matching said set of parameters and having at least a first recessed bore diameter greater than said first finished bore dimension;
- designating at least a first and a second build-up welding portion along a bore of said cylinder block corresponding to said thrust and said anti-thrust directions;
- performing build-up welding in said first and said second build-up welding portions;
- and
- finishing said bore into said first finished bore dimension, whereby a surface of said bore retains said desired abrasion resistance layer thickness along said thrust and said anti-thrust directions and said cylinder block has a first welding strain less than said desired welding strain.
A method for manufacturing a cylinder block for an internal combustion engine, comprising the steps of:
- conducting build-up welding on an inner surface of a bore of said cylinder block only in a region where a detrimental abundance of piston abrasion occurs;
- and
- finishing said inner surface of said bore to a final dimension, whereby said inner surface is resistance to piston abrasion and a build-up welding portion has a desired final thickness.
Dependencies are inferred from the claim text.