FreshPatents.com Logo
stats FreshPatents Stats
1 views for this patent on FreshPatents.com
2012: 1 views
Updated: April 14 2014
newTOP 200 Companies filing patents this week


    Free Services  

  • MONITOR KEYWORDS
  • Enter keywords & we'll notify you when a new patent matches your request (weekly update).

  • ORGANIZER
  • Save & organize patents so you can view them later.

  • RSS rss
  • Create custom RSS feeds. Track keywords without receiving email.

  • ARCHIVE
  • View the last few months of your Keyword emails.

  • COMPANY DIRECTORY
  • Patents sorted by company.

AdPromo(14K)

Follow us on Twitter
twitter icon@FreshPatents

Turbocharger, notably for a combustion engine

last patentdownload pdfdownload imgimage previewnext patent


20120321491 patent thumbnailZoom

Turbocharger, notably for a combustion engine


The turbocharger comprises a shaft 14, a housing 12, a turbine wheel 20 and a compressor wheel 22 mounted onto the shaft, and at least a rolling bearing 18 disposed between the shaft and the housing and comprising an inner ring 26, an outer ring 28 and at least one row of rolling elements 30 disposed into a rolling space 40 defined between the rings. A damping space 38 is defined between an outer surface 28a of the outer ring and a bore 16 of the housing inside which a lubricant is located.

Browse recent Aktiebolaget Skf patents - Goteborg, SE
Inventors: Samuel VIAULT, Jeroen Wensing, Nicolas Berruet, Richard Corbett
USPTO Applicaton #: #20120321491 - Class: 417406 (USPTO) - 12/20/12 - Class 417 
Pumps > Motor Driven >Fluid Motor >Rotary Motor >Unitary Pump And Motor Rotors

view organizer monitor keywords


The Patent Description & Claims data below is from USPTO Patent Application 20120321491, Turbocharger, notably for a combustion engine.

last patentpdficondownload pdfimage previewnext patent

CROSS-REFERENCE

This application claims priority to European Patent Application No. EP11305761.6 filed on Jun. 17, 2011.

FIELD OF THE INVENTION

The present invention relates to the field of turbochargers, and in particular those used in combustion engines for automotive vehicles.

BACKGROUND OF THE INVENTION

In such application, a turbocharger is used to enhance the combustion engine performance by blowing compressed air into the cylinders of said engine.

A turbocharger generally comprises a housing, a shaft extending through an opening formed on the housing, a turbine wheel mounted on a first end portion of the shaft and located in an exhaust gases passage of the combustion engine, a compressor wheel mounted on an opposite second end portion of said shaft and located in an admission gases passage of the engine, and rolling bearings disposed between the shaft and the housing. When the turbine wheel is rotated by the flow of the exhaust gases, the shaft and the compressor wheel are rotated which leads to a compression of the admission gases introduced into the cylinders of the combustion engine.

The engine oil may be used for the lubrication of the rolling bearings. However, when the combustion engine stops, the delivery of engine oil is shut off. This causes a strong temperature increase of the residual oil located between the shaft and the rolling bearing near to the turbine wheel. The cooling of said rolling bearing is thus not satisfactory. Otherwise, the engine oil may contain foreign matter, for example small metal particles, thereby causing a premature wear of the rolling bearings.

To overcome these drawbacks, European patent application EP-A2-2 042 758 discloses a turbocharger comprising a tank for storing a specific lubricating oil for the rolling bearings, said tank being formed within the housing. A tube is provided between the storage tank and the space where are housed the rolling bearings to supply by capillary action the lubricating oil. In the disclosed turbocharger, an intermediate bearing casing is also mounted between the rolling bearings and the housing, said casing being equipped with damper rings to reduce the transmission of vibrations emitted by the turbine and compression wheels.

This leads to a complex structure of the turbocharger as well as an increase of the mounting cost.

One aim of the present invention is therefore to overcome the aforementioned drawbacks.

SUMMARY

OF THE INVENTION

It is a particular object of the present invention to provide a turbocharger which is simple to manufacture and economic, while guaranteeing good sealing and damping properties.

In one embodiment, the turbocharger comprises a shaft, a housing, a turbine wheel and a compressor wheel mounted onto the shaft, and at least a rolling bearing disposed between the shaft and the housing and comprising an inner ring, an outer ring and at least one row of rolling elements disposed into a rolling space defined between the rings. A damping space is defined between an outer surface of the outer ring and a bore of the housing inside which a lubricant is located.

In one embodiment, the turbocharger further comprises at least two sealing means closing at least the rolling space.

In one embodiment, the turbocharger further comprises at least two sealing means closing the damping space and the rolling space.

In one embodiment, the turbocharger further comprises passage means for the lubricant putting the damping space and the rolling space into communication.

In one embodiment, the sealing means are axially offset outwards with respect to the passage means.

The passage means may comprise a gap between the outer ring and the housing. Alternatively or in combination, the passage means comprise holes made in the thickness of the outer ring. The lubricant located inside the damping space may be grease.

In one embodiment, the sealing means are disposed radially between the shaft and the housing.

In another embodiment, the sealing means are disposed radially between the inner and outer rings. The sealing means may only close the rolling space. The rolling space may be filled with a lubricant distinct from the lubricant located in the damping space.

In one embodiment, the axial length of the rolling bearing ranges between 30% and 95% of the axial dimension of the housing, and preferably ranges between 70% and 80%.

BRIEF DESCRIPTIONS OF THE DRAWINGS

The present invention and its advantages will be better understood by studying the detailed description of specific embodiments given by way of non-limiting examples and illustrated by the appended drawings on which:

FIG. 1 is an axial section of a turbocharger according to a first example of the invention, and



Download full PDF for full patent description/claims.

Advertise on FreshPatents.com - Rates & Info


You can also Monitor Keywords and Search for tracking patents relating to this Turbocharger, notably for a combustion engine patent application.
###
monitor keywords



Keyword Monitor How KEYWORD MONITOR works... a FREE service from FreshPatents
1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored.
3. Each week you receive an email with patent applications related to your keywords.  
Start now! - Receive info on patent apps like Turbocharger, notably for a combustion engine or other areas of interest.
###


Previous Patent Application:
Convertible and compact refrigeration system
Next Patent Application:
Fan with flexible drive shaft
Industry Class:
Pumps
Thank you for viewing the Turbocharger, notably for a combustion engine patent info.
- - - Apple patents, Boeing patents, Google patents, IBM patents, Jabil patents, Coca Cola patents, Motorola patents

Results in 0.51719 seconds


Other interesting Freshpatents.com categories:
QUALCOMM , Monsanto , Yahoo , Corning , -g2--0.8331
     SHARE
  
           

FreshNews promo


stats Patent Info
Application #
US 20120321491 A1
Publish Date
12/20/2012
Document #
13492972
File Date
06/11/2012
USPTO Class
417406
Other USPTO Classes
International Class
/
Drawings
3



Follow us on Twitter
twitter icon@FreshPatents