Piston for an internal combustion engine

• US 8,584,626 B2
• Filed: 03/02/2011
• Issued: 11/19/2013
• Est. Priority Date: 03/02/2010
• Status: Expired due to Fees

• Current Assignee: Mahle International GmbH (MAHLE-STIFTUNG GmbH)
• Original Assignee: Mahle International GmbH (MAHLE-STIFTUNG GmbH)
• Inventors: Jacobi, Detlef
• Primary Examiner(s): Kamen, Noah
• Assistant Examiner(s): MOUBRY, JAMES G
• Application Number:
  US13/582,129
• Publication Number:
  US 20130055969A1
• Time in Patent Office: 993 Days
• Field of Search: 123/41.34, 123/41.35, 123/193.1, 123/193.6, 123/197.2, 921/76, 922/55
• US Class Current: 123/41.35
• CPC Class Codes: F02F 3/003 the parts being connected by casting, brazing, welding or clamping
• CPC Class Codes: F02F 3/18 the means being a liquid or solid coolant, e.g. sodium, in a closed chamber in piston
• CPC Class Codes: F02F 3/20 the means being a fluid flowing through or along piston

Abstract

The present invention relates to a piston (10, 110, 210) for an internal combustion engine, comprising a piston crown (13), a circumferential ring part (16), a circumferential cooling channel (27) arranged in the vicinity of the ring part (16), boss supports (21) connected below the piston crown (13), piston bosses (18) connected thereto, and a piston skirt (17). According to the invention, a cavity (28) closed on all sides and having a closure element (29, 129, 229) arranged in the direction of the piston skirt (17) is provided below the piston crown (13).

Claims

1. A piston for an internal combustion engine, which has a piston crown, a circumferential ring belt, a circumferential cooling channel in the region of the ring belt, pin boss supports connected below the piston crown, and pin bosses connected with them, as well as a piston skirt, wherein a cavity closed off all around, having a closure element disposed in the direction of the piston skirt is provided below the piston crown, wherein the closure element is configured as a double-walled closure body, and wherein the double-walled closure body encloses a chamber.

2. The piston according to claim 1, wherein the double-walled closure body is configured in one part or two parts.

3. The piston according to claim 1, wherein the closure element is configured as a closure body held in the region of the pin boss connections of the piston.

4. The piston according to claim 1, wherein the closure element is held in the piston under spring bias.

5. The piston according to claim 1, wherein the closure element is configured as a spring-elastic component, at least in part.

6. The piston according to claim 1, wherein the closure element is held in an accommodation means provided in the piston.

7. The piston according to claim 1, wherein the closure element is produced from a spring sheet steel.

8. The piston according to claim 1, wherein the piston is configured as a one-part piston.

9. The piston according to claim 1, wherein the piston is configured as a multi-part piston.