Liquid-cooled piston
First Claim
1. A liquid-cooled internal combustion engine piston (10) comprisingat least one annular segment-shaped coolant duct (12a, 12b ) formed in an upper piston member and having openings (16a, 16b) for supplying and discharging coolant toward a crank chamber at sites symmetrical relative to a gudgeon pin axis (14), andan approximately radial communicating duct (20) including an opening (18) and enclosed in its course toward the crank chamber and connected to said annular segment-shaped ducts (12a, 12b) in the area of said openings (16a, 16b, 18).
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Accused Products
Abstract
A liquid-cooled internal combustion engine piston (10) comprises on the one hand at least one annular segment-shaped coolant duct (12a, 12b) formed within an upper piston member and having openings (16a, 16b, 18) at sites symmetrical relative to the gudgeon pin axis (14) for supplying and discharging oil. On the other hand, an approximately radial communicating duct (20) enclosed in its course toward the crank chamber and connected to the annular segmented ducts (12a, 12b) in the region of the openings (16a, 16b, 18) is provided.
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Citations
32 Claims
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1. A liquid-cooled internal combustion engine piston (10) comprising
at least one annular segment-shaped coolant duct (12a, 12b ) formed in an upper piston member and having openings (16a, 16b) for supplying and discharging coolant toward a crank chamber at sites symmetrical relative to a gudgeon pin axis (14), and an approximately radial communicating duct (20) including an opening (18) and enclosed in its course toward the crank chamber and connected to said annular segment-shaped ducts (12a, 12b) in the area of said openings (16a, 16b, 18).
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9. A liquid-cooled internal combustion engine piston (10) comprising
at least one annular segment-shaped coolant duct (12a, 12b) formed in an upper piston member and having openings (16a, 16b) for supplying and discharging coolant toward a crank chamber at sites symmetrical relative to a gudgeon pin axis (14), and an approximately radial communicating duct (20) including an opening (18) and enclosed in its course toward the crank chamber and connected to said annular segment-shaped ducts (12a, 12b) in the area of said openings (16a, 16b, 18), whereby a deflector (26) is respectively provided in the area of said openings (16a, 16b, 18) of said coolant ducts (12a, 12b, 20), said deflector deflecting in accordance with a stroke length of said piston (10) within a cylinder a coolant jet directed at said openings (16a, 16b, 18) into one of said two annular segment-shaped coolant ducts (12a, 12b) or into said communicating duct (20).
Specification