Cylinder bore with selective surface treatment and method of making the same
First Claim
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1. A cylinder bore having a longitudinal axis and a cylindrical wall extending along the longitudinal axis, the cylindrical wall comprising:
- a first end portions having a first diameter; and
a middle portion axially adjacent to the first end portion, the middle portion having a second diameter greater than the first diameter and a plurality of parallel, alternating teeth and grooves formed therein to provide a surface roughness of the middle portion greater than a surface roughness of the first end portion.
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Abstract
A cylinder bore with selective surface treatment includes a longitudinal axis and a cylindrical wall extending along the longitudinal axis, the cylindrical wall including first and second end portions and a middle portion positioned between the first and second end portions, the middle portion having a greater surface roughness than at least one of the first and second end portions.
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Citations
14 Claims
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1. A cylinder bore having a longitudinal axis and a cylindrical wall extending along the longitudinal axis, the cylindrical wall comprising:
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a first end portions having a first diameter; and a middle portion axially adjacent to the first end portion, the middle portion having a second diameter greater than the first diameter and a plurality of parallel, alternating teeth and grooves formed therein to provide a surface roughness of the middle portion greater than a surface roughness of the first end portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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- 9. A cylinder bore having a longitudinal axis and a cylindrical wall extending along the longitudinal axis, the cylindrical wall including first and second end portions having a first diameter and a middle portion positioned between the first and second end portions and having a second diameter greater than the first diameter, the middle portion having a plurality of parallel, alternating teeth and grooves formed therein.
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11. A method of forming a cylinder bore having a longitudinal axis and a cylindrical wall extending along the longitudinal axis, the cylindrical wall including first and second end portions and a middle portion positioned between the first and second end portions, the method comprising:
forming the middle portion to have a diameter greater than a diameter of the first portion and a diameter the second portion and having a plurality of parallel, alternating teeth and grooves formed therein. - View Dependent Claims (12, 13, 14)
Specification