Filtering system for motor oil of an internal combustion engine and replaceable filter of a filtering system

Patent metadata

Field	Value
Publication number	US-9670805-B2
Application number	US-201313947054-A
Country	US
Kind code	B2
Filing date	Jul 20, 2013
Priority date	Jan 31, 2011
Publication date	Jun 6, 2017
Grant date	Jun 6, 2017

Abstract

A filtering system ( 9 ) includes a filter head ( 12 ) and a replaceable filter ( 10 ). The filter head ( 12 ) has a feed line ( 66 ) and discharge line ( 62 ). The replaceable filter ( 10 ) is removable and replaceably mounted onto the filter head ( 12 ) by a rotational and/or plug connection ( 15 ) and includes a housing ( 17 ) with at least one inlet ( 26 ) for oil to be filtered and at least one outlet ( 28 ). The inlet ( 26 ) communicates with the feed line ( 66 ). The outlet ( 28 ) communicates with the discharge line ( 62 ). The housing ( 17 ) has a filtering element ( 34 ) that sealingly separates the inlet ( 26 ) from the outlet ( 28 ). The filter head ( 12 ) includes an auxiliary oil line ( 60 ). The replaceable filter ( 10 ) has a flow control element ( 53 ) that automatically closes or releases the auxiliary oil line ( 60 ) dependent on an operation and/or assembly condition.

First claim

The invention claimed is:

1. A filtering system for motor oil of an internal combustion engine, comprising:
a filter head, including:
a feed line receiving motor oil to be filtered;
a discharge line discharging filtered motor oil;
a rotational head or plug connection on the filter head; and
an auxiliary oil line;

a replaceable filter removeably connected and mounted on the filter head;
wherein the replaceable filter is releaseably connected to the filter head by the rotational or plug connection;
wherein the replaceable filter includes:
a filter housing, the filter housing including:
at least one inlet receiving motor oil to be filtered and in fluid flow communication with the feed line;
wherein the filter housing has an annular rotational or plug connection member, the annular rotational or plug connection member of the filter housing engaging onto the rotational or plug connection of the filter head, mounting the replaceable filter to the filter head;
wherein the annular rotational or plug connection member of the filter housing has an outlet opening extending therethrough, the outlet opening discharging filtered motor oil from an interior of the replaceable filter, the outlet opening in fluid flow communication with the discharge line; and
a filter element of an annular circumferentially closed filter medium circumferentially surrounding a hollow interior, the filter medium having two opposing axial end faces, the filter element arranged within an interior of the filter housing, the filter element seal-tightly separating the inlet from the outlet opening, the filter element including:
a terminal disk arranged on one of the axial end faces of the filter medium, the terminal disk having a central opening extending through the terminal disk, opening into the hollow interior;
a central tube arranged within the hollow interior at a radially inner side of the filter medium, the central tube extending between the two opposing axial end faces of the filter medium;
a tubular shaft extending from an interior of the central tube radially interior to the filter medium, through the central opening of the terminal disk and through the outlet opening of the filter housing to an exterior of the filter housing, the tubular shaft having:
 a first end extending through the central opening of the terminal disk, the first end positioned within a radial interior of the central tube, within the hollow interior of the filter medium, the first end directly connected onto the central tube of the filter element;
 an opposing second end spaced outwardly away from the filter housing;
 at least one closure element arranged at and secured onto the second end of the tubular shaft;
 wherein the tubular shaft is fixedly connected directly onto the central tube within the hollow interior by a clip-on connection , the clip-on connection formed on the tubular shaft at the first end by radially outwardly acting clips, the radially outwardly acting clips arranged in the interior of the central tube and directly engaging the central tube;
 wherein the tubular shaft and at least one closure element of the replaceable filter form an automatically operating outflow control element that automatically closes or releases the auxiliary oil line depending on an operating or mounting condition;

wherein the filter head further includes a shaft receptacle into which, when the replaceable filter is mounted, the tubular shaft is inserted in such a way that the at least one closure element at least partially closes off the auxiliary oil line.

2. The filtering system according to claim 1 , wherein
the auxiliary oil line includes an oil drain operable for draining motor oil from the feed line or the discharge line upon removal of the replaceable filter; and
at least one closure element closes off the oil drain when the replaceable filter is mounted to the filter head and that automatically releases the oil drain when the replaceable filter is removed from the filter head.

3. The filtering system according to claim 1 , wherein
the auxiliary oil line is fluidically connected with an auxiliary oil circuit; and
the at least one closure element automatically controls an oil flow into the auxiliary oil circuit;
wherein the at least one closure element is automatically controlled by any of: oil level and oil temperature.

4. The filtering system according to claim 3 , wherein
the outflow control element includes a control unit having a float detecting oil level or a wax thermostatic element responsive to oil temperature;
wherein the control unit is connected functionally with the at least one closure element and actuates the at least one closure element.

5. The filtering system according to claim 1 , wherein
the outlet opening is coaxial to a rotational/plug-in axis of the rotational or plug connection; and
wherein the tubular shaft is arranged coaxially to the rotational/plug-in axis.

6. The filtering system according to claim 1 , wherein
the tubular shaft has an open interior whose outer wall has a plurality of openings extending into the interior of the tubular shaft.

7. The filtering system according to claim 1 , wherein
the replaceable filter is replaceably mounted onto the filter head from above the filter head.

8. A replaceable filter of a filtering system that is releaseably mountable by means of a rotational and/or plug connection on a filter head, the replaceable filter comprising:
a filter housing, the filter housing including:
at least one inlet receiving motor oil to be filtered;
wherein then filter housing has an annular rotational or plug connection member, the annular rotational or plug connection member of the filter housing configured to engage with a rotational or plug connection of the filter head, to mount the replaceable filter to the filter head;
wherein the annular rotational or plug connection member of the filter housing has an outlet opening extending therethrough, the outlet opening discharging filtered motor oil from an interior of the replaceable filter;
a filter element of an annular circumferentially closed filter medium circumferentially surrounding a hollow interior, the filter medium having two opposing axial end faces, the filter element arranged within an interior of the filter housing, the filter element seal-tightly separating the inlet from the outlet opening, the filter element including:
a terminal disk arranged on one of the axial end faces of the filter medium, the terminal disk having a central opening extending through the terminal disk, opening into the hollow interior;
a central tube arranged within the hollow interior at a radially inner side of the filter medium, the central tube extending between the two opposing axial end faces of the filter medium;
a tubular shaft extending from an interior of the central tube radially interior to the filter medium, through the central opening of the terminal disk and through the outlet opening of the filter housing to an exterior of the filter housing, the tubular shaft having:
a first end extending through the central opening of the terminal disk, the first end positioned within a radial interior of the central tube, within the hollow interior of the filter medium, the first end directly connected onto the central tube of the filter element
an opposing second end spaced outwardly away from the filter housing;
a closure element arranged at and secured onto the second end of the tubular shaft;
wherein the tubular shaft is fixedly connected directly onto the central tube within the hollow interior by a clip-on connection, the clip-on connection formed on the tubular shaft at the first end by radially outwardly acting clips, the radially outwardly acting clips arranged in

Assignees

• Mann & Hummel Gmbh

Inventors

• Wildermuth Andreas
• Epli Sven
• Schreckenberger Dieter

Classifications

• B01D27/103

  Bypass or safety valves · CPC title

• F01M11/03 Primary

  Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means (filters B01D) · CPC title

• B01D35/153

  Anti-leakage or anti-return valves · CPC title

• B01D2201/4084

  Snap or Seeger ring connecting means · CPC title

• B01D27/08 Primary

  Construction of the casing · CPC title