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US 10,871,099 B2Granted
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 separate 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 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,
- wherein the crown and the skirt part are formed separately of compatible materials and are joined by welding or brazing.
6 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 separate 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 sidewall portions 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,
- wherein the crown and the skirt part are formed separately of compatible materials and are joined by welding or brazing.
5 more elements
Dependencies are inferred from the claim text.