Light alloy piston
AssigneeKolbenschmidt Aktiengesellschaft
InventorsGunder Essig, Manfred Bordt
Life of this patent
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Abstract
In a light alloy piston each of the load-carrying skirt surfaces is divided into a plurality of load-carrying skirt surface portions. In order to ensure that the upper portion of the piston skirt will carry load on a large area even when the engine is warming up, a plurality of depressions extending in the peripheral direction of the piston skirt are formed in the latter between its clearance-defining top and bottom ends.
Claims10
In a light alloy piston for internal combustion engines, having a convex, oval external shape and comprising a plurality of load-carrying skirt surfaces each of which is divided into a plurality of load-carrying skirt surface portions, the improvement wherein:
- the skirt of the piston has a convex shape circumscribed by a clearance-defining curve and has a plurality of depressions extending in the peripheral direction of the skirt of the piston, and being in the skirt between its upper and lower end portions wherein the depressions constitute lubricant reservoirs which reduce losses due to friction.
Dependencies are inferred from the claim text.