Piston for a combustion engine

• US 20070283917A1
• Filed: 06/12/2006
• Published: 12/13/2007
• Est. Priority Date: 06/12/2006
• Status: Abandoned Application

• Current Assignee: Mahle International GmbH (MAHLE-STIFTUNG GmbH), Mahle Technology, Inc. (MAHLE-STIFTUNG GmbH)
• Original Assignee: Mahle International GmbH (MAHLE-STIFTUNG GmbH), Mahle Technology, Inc. (MAHLE-STIFTUNG GmbH)
• Inventors: Lapp, Michael T., Ioja, Valerian, Zhao, Grace
• Application Number:
  US11/451,257
• Publication Number:
  US 20070283917A1
• Time in Patent Office: Days
• US Class Current: 123/193.600
• CPC Class Codes: F02F 3/003 the parts being connected by casting, brazing, welding or clamping
• CPC Class Codes: F02F 3/10 having surface coverings F02F3/02 takes precedence
• CPC Class Codes: F02F 3/22 the fluid being liquid

Abstract

The present invention relates to a piston (10, 110) for a combustion engine having a basic element (11, 111) and a ring carrier element (12, 112) held on the basic element (11, 111) with a top land (25, 125) all around its circumference and ring belt (26, 126) all around its circumference. It is provided in accordance with the invention that the ring carrier element (12, 112) grips around the basic element (11, 111) at least partially and is held on the basic element (11, 111) by means of a press fit.

Claims

1. Piston (10, 110) for a combustion engine, having a basic element (11, 111) and a ring carrier element (12, 112) held on the basic element with a top land (25, 125) all around its circumference and a ring belt (26, 126) all around its circumference, wherein the ring carrier element (12, 112) grips around the basic element (11, 111) at least partially and is held on the basic element (11, 111) by means of a press fit.

2. Piston according to claim 1, wherein the piston (10) has a piston crown (14) with an inner or central area (13) formed by the basic element (11) and having an all-round shoulder (21) and with an outer area (31) formed by the ring carrier element (12) and annularly surrounding said inner area (13), and wherein the ring carrier element (12) grips around the all-round shoulder (21) in the radial direction.

3. Piston according to claim 2, wherein a weld (33) is provided between the all-round shoulder (21) and the ring carrier element (12).

4. Piston according to claim 2, wherein the piston crown (14) has a combustion bowl (15).

5. Piston according to claim 1, wherein the piston (110) has a piston crown (114) formed by the ring carrier element (112), wherein the basic element (111) is provided with an annular collar (136) aligned axially and facing the ring carrier element (112), and wherein the ring carrier element (112) grips around the annular collar (136).

6. Piston according to claim 5, wherein the ring carrier element (112) can have at least one all-round contact surface (137) facing the basic element (111) and wherein the basic element (111) can have at least one all-round support surface (141) corresponding to the at least one contact surface (137) and facing the ring carrier element (112).

7. Piston according to claim 5, wherein the ring carrier element (112) has a recess (138) facing the basic element (111), wherein the basic element (111) has a raised area (142) facing the ring carrier element (112), and wherein the recess (138) and the raised area (142) engage by means of a press fit.

8. Piston according to claim 5, wherein the piston crown (114) has a combustion bowl (115).

9. Piston according to claim 1, wherein the basic element (11, 111) and the ring carrier element (12, 112) enclose an all-round cooling channel (35, 135).

10. Piston according to claim 1, wherein the basic element (11, 111) comprises a light metal material or a steel material, and the ring carrier element (12, 112) comprises a steel material.