Cylinder liner reconditioning process and cylinder liner produced thereby
AssigneePrecision National Plating Services, Inc.
InventorSam Fleri
Life of this patent
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Abstract
The present invention relates to an apparatus and a method for finishing engine cylinder walls and reconditioning used engine cylinders. The invention also provides engine cylinders having a multilayer coating of a base layer, a steel layer and a layer of a tetrafluoroethylene fluorocarbon polymer, i.e., a "Teflon" wear surface.
Claims18
An internal combustion cylinder having an internal surface with a multilayer coating, said coating comprising;
- a first homogenous bond layer;
- a second homogenous steel layer;
- and
- an outer surface layer of tetrafluoroethylene fluorocarbon polymer.
A method for reconditioning an internal surface of a used internal combustion cylinder, comprising the steps of:
- (a) boring the cylinder in a single rotational direction relative to the cylinder;
- (b) baking the cylinder so as to substantially remove any oil impurities present in the internal cylinder surface;
- (c) blasting the internal cylinder surface with grit;
- (d) applying a homogenous bond coating to said blasted cylinder surface and immediately thereafter;
- (e) applying a homogenous steel coating over said bond coating, while relatively rotating the cylinder in said single rotational direction;
- (f) boring said cylinder;
- (g) applying a tetrafluoroethylene fluorocarbon polymer to said cylinder surface;
- (h) permanently bonding said tetrafluoroethylene fluorocarbon polymer to said cylinder;
- and
- (i) removing excess tetrafluoroethylene fluorocarbon polymer therefrom.
A method for providing a finish on an internal surface of a clean internal combustion cylinder which has been bored in a determined rotational direction, comprising the steps of:
- (a) applying homogenous bond coating to said cylinder surface and immediately thereafter;
- (b) applying a homogenous steel coating over said bond coating, while relatively rotating the cylinder in said rotational direction;
- (c) boring said cylinder;
- (d) applying a tetrafluoroethylene fluorocarbon polymer to said cylinder surface;
- (e) permanently bonding said tetrafluoroethylene fluorocarbon polymer to said cylinder;
- and
- (f) removing excess tetrafluoroethylene fluorocarbon polymer therefrom.
Dependencies are inferred from the claim text.