Patent ID: 11959436
Assignee: TENNECO GMBH
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 0:
1. A piston, comprising:
a crown extending longitudinally along a center axis and an outer rim extending circumferentially around the center axis,
the crown including a combustion surface extending radially from the outer rim toward the center axis,
the crown including a combustion bowl extending radially from the combustion surface toward the center axis,
the combustion surface including spiral features disposed around the center axis,
each spiral feature having a first wall extending at an angle of 10 to 45° relative to the outer rim,
each spiral feature having a second wall extending from the first wall to a first wall of an adjacent spiral feature,
the second wall extending at an angle of 15 to 60° relative to the outer rim,
first wall and the second wall presenting an apex therebetween,
each spiral feature having an outer wall extending from the bowl rim toward the center axis and the apex,
each spiral feature having an inner wall extending from the combustion bowl away from the center axis and toward the apex,
the combustion bowl including a concave surface disposed radially inward of the spiral features between the spiral features and the center axis, and
wherein the concave surface is not radially aligned with the spiral features or radially outward of the spiral features.