Power assembly for internal combustion engine with welded-in piston scraper

• US 8,459,175 B2
• Filed: 05/03/2011
• Issued: 06/11/2013
• Est. Priority Date: 03/26/2008
• Status: Active Grant

• Current Assignee: GE Global Sourcing LLC (Westinghouse Air Brake Technologies Corporation)
• Original Assignee: General Electric Company
• Inventors: Blythe, Neil, Dowell, John P., Record, Barry, Schleigh, Michael, Orlando, Richard C., Gunti, Ranga Srinivas
• Primary Examiner(s): Lopez, F. Daniel
• Application Number:
  US13/099,419
• Publication Number:
  US 20110203546A1
• Time in Patent Office: 770 Days
• Field of Search: 921/691, 921/711
• US Class Current: 92/171.1
• CPC Class Codes: F02B 77/04 Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines cleaning of fuel injection apparatus F02M65/00
• CPC Class Codes: F02F 1/20 characterised by constructional features providing for lubrication
• CPC Class Codes: F02F 2001/006 having a ring at the inside of a liner or cylinder for preventing the deposit of carbon oil particles, e.g. oil scrapers
• CPC Class Codes: F16J 10/04 Running faces; Liners

Abstract

A power assembly for an internal combustion engine includes a piston housed within a cylinder, with the cylinder having a welded cylinder head, with the cylinder also including a one-piece piston scraper which is welded to the cylinder head, as well as to the cylinder, with a common weld bead.

Claims

1. A power assembly for an internal combustion engine, comprising:

a cylinder having an inner circular wall defining a first inside diameter;

a piston reciprocally housed within the cylinder, with said piston having a top land;

a cylinder head attached to an end of the cylinder; and

a one-piece, cylindrical scraper sleeve mounted within a counterbore defined by separate counterbores formed in the cylinder and cylinder head, wherein the scraper sleeve is connected to both said cylinder head and said cylinder.

2. The power assembly of claim 1, wherein the scraper sleeve, cylinder head, and cylinder are joined into a single assembly.

3. The power assembly of claim 2 wherein the scraper sleeve, the cylinder head and the cylinder are welded together.

4. The power assembly of claim 1 wherein the scraper sleeve is gapless.