Wet/dry cylinder liner for high output engines

Details Wet/dry cylinder liner for high output engines Wet/dry cylinder liner for high output engines

1987-12-22

1990-05-22

Feinberg, Craig R.

Internal-combustion engines

Cooling

With jacketed head and/or cylinder

123 4167, 123193C, F02F 110

Patent

active

049268015

ABSTRACT:
The cylinder liner of an internal combustion engine includes a wet-type upper portion and a dry-type lower portion. The interior wall of the cylinder and the corresponding lower portion of the liner are machined to have an interference fit under operating conditions. The liner is firmly supported by this interference fit engagement of the liner with the cylinder bore over approximately two-thirds the length of the liner. The cylinder wall is machined to provide a shoulder substantially at the junction of the upper and lower portions of the liner and a corresponding shoulder is formed at this point on the liner. These shoulders are forced into firm sealing engagement by the torque applied to the cylinder head screws during asssembly of the cylinder head on the engine block. The vertical dimension of the shoulder on the cylinder liner is formed to be a minimum of 1/8 of the vertical dimension of upper portion of the liner. The upper (wet) portion of the cylinder liner is formed to include alternate thinner and thicker portions, the thicker portions strengthening the liner in the wet area and enabling the overall thickness of this portion of the liner to be smaller than would otherwise be possible. Further, the shapes involved by this construction provide a plurality of parallel annular flow passages by which the cooling fluid is directed in parallel paths around the upper portion of each of the cylinders from one side of each cylinder to the other side thereof.

REFERENCES:
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patent: 4562799 (1986-01-01), Woods et al.
patent: 4759317 (1988-07-01), Ampferer

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