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US 2017/0370273 A1Published application
Piston cooling for opposed-piston engine
AssigneeAchates Power, Inc.
InventorRYAN G. MACKENZIE
Life of this patent
Estimating the term…
Abstract
Pistons for opposed-piston engines include an interior annular cooling gallery. The gallery is provided with inlet and drain passageways constructed to shield a jet of liquid coolant entering the gallery, thereby reducing interference between the incoming jet and liquid coolant circulating in the gallery.
Claims14
A piston for an opposed-piston engine, comprising:
- a crown with an end surface shaped to define a combustion chamber with an end surface of an opposing piston in an opposed-piston engine;
- a skirt part joined to the crown and including a piston sidewall extending from the crown to an open end of the skirt part;
- an annular cooling gallery defined between the crown and the skirt part;
- a first set of ring grooves formed in an outer peripheral surface of the crown;
- a second set of ring grooves formed in formed in a portion of the sidewall near the open end of the skirt;
- the sidewall comprising two opposing sidewall portions separated from one another by two intervening sidewall indentations;
- and,
- a wristpin bore extending between the sidewall indentations.
5 more elements
A piston for an opposed-piston engine, the piston having a longitudinal axis and comprising:
- a crown with an end surface shaped to define a combustion chamber with an end surface of an opposing piston in an opposed-piston engine;
- a skirt part joined to the crown;
- the crown including first ring grooves;
- the skirt part including second ring grooves spaced apart from the first ring grooves along the longitudinal axis;
- the skirt part including a piston sidewall with opposing skirt portions extending from the first to the second ring grooves and separated from one another by intervening sidewall indentations running along the longitudinal axis between the first and second ring grooves;
- an annular cooling gallery within the piston;
- a wristpin bore extending between the sidewall indentations.
4 more elements
Dependencies are inferred from the claim text.