Piston, piston ring and oil distribution ring for a stroke piston combustion engine

The piston has a piston ring packing (4) that is formed between a piston crown (101) and a piston skirt (102) at a lateral surface. The piston ring packing has a partial ring packing (400) with a piston ring (41) in a piston ring groove (411), where another piston ring (42) is provided. An intermediate space is provided in the form of a recess (5,51) between the both piston rings. A pressure releasing unit (4000,4111) is provided in the form of a pressure relief groove. An independent claim is included for an oil distribution ring for a piston, which is provided with storage reservoir.