Exchangeable filter system

Patent metadata

Field	Value
Publication number	US-11298637-B2
Application number	US-201916677799-A
Country	US
Kind code	B2
Filing date	Nov 8, 2019
Priority date	Nov 9, 2018
Publication date	Apr 12, 2022
Grant date	Apr 12, 2022

Abstract

An exchangeable filter system is provided with an exchangeable filter module that has at least one fluid inlet, at least one fluid outlet, and a fluid path connecting the at least one fluid inlet and the at least one fluid outlet with each other. The exchangeable filter module is provided with at least one filter element for filtering a fluid. A flange element and a counter flange element are provided. The flange element is provided to releasably engage the exchangeable filter module and to releasably engage the counter flange element. A valve device is arranged in the flange element. The valve device blocks the fluid path when the flange element is in engagement with the exchangeable filter module and is disengaged from the counter flange element. An internal combustion engine is provided with such an exchangeable filter system to filter fuel, lubricant or urea.

First claim

What is claimed is:

1. An exchangeable filter system comprising:
an exchangeable filter module comprising
at least one fluid inlet,
at least one fluid outlet, and
a fluid path connecting the at least one fluid inlet and the at least one fluid outlet with each other,
wherein the exchangeable filter module further comprises
at least one filter element configured to filter a fluid, the at least one filter element having a hollow interior extending from a first axial end to an opposite second axial end of the at least one filter element;
a flange element;
a counter flange element;
wherein the flange element is configured to releasably engage the exchangeable filter module and to releasably engage the counter flange element;
a valve device arranged in the flange element,
wherein the valve device is configured to block the fluid path when the flange element is in engagement with the exchangeable filter module and is disengaged from the counter flange element;

the exchangeable filter module further comprising:
a pretensioning device comprising a pretensioning element and
a counter pretensioning element,
wherein the pretensioning device is interacting with the valve device,
wherein the pretensioning element is in engagement with the counter pretensioning element when the exchangeable filter module is in engagement with the flange element;

wherein the valve device comprises:
a valve element; and
a spring element;

wherein the counter pretensioning element is attached to the spring element,
wherein the valve element, when the pretensioning element is in engagement with the counter pretensioning element, is pretensioned by the spring element against a valve seat of the valve device.

2. The exchangeable filter system according to claim 1 , wherein
the filter element comprises an end disc,
wherein the pretensioning element is embodied as one piece together with the end disc of the filter element or is attached to the end disc of the filter element.

3. The exchangeable filter system according to claim 1 , wherein
the pretensioning element comprises
an axial projection extending in an axial direction of the exchangeable filter module,
wherein the counter pretensioning element comprises an annular centering counter contour configured to receive the axial projection of the pretensioning element,
wherein the axial projection of the pretensioning element, when the pretensioning element is in engagement with the counter pretensioning element, is in engagement with the annular centering counter contour of the counter pretensioning element.

4. The exchangeable filter system according to claim 1 , wherein
the counter flange element comprises
an actuating element,
wherein, when the flange element is in engagement with the counter flange element, the actuating element interacts with the valve device such that the actuating element exerts a force on the valve device that is greater than a pretensioning force of the pretensioning device.

5. The exchangeable filter system according to claim 4 , wherein
the pretensioning element, the counter pretensioning element, and the actuating element are arranged in the fluid path at a side of the fluid path facing the fluid outlet,
wherein the pretensioning element, the counter pretensioning element, and the actuating element leave open the fluid path at least partially.

6. An internal combustion engine comprising
an exchangeable filter system according to claim 1 ,
wherein the exchangeable filter system is configured to filter fuel, lubricant or urea used in the internal combustion engine.

Assignees

• Mann & Hummel Gmbh

Inventors

• Linhart Jochen
• Vogt Christian

Classifications

• B01D2201/16

  Valves · CPC title

• F02M37/42

  Installation or removal of filters · CPC title

• F02M33/00

  Other apparatus for treating combustion-air, fuel or fuel-air mixture (combustion-air cleaners F02M35/00; arrangements for purifying liquid fuel F02M37/22) · CPC title

• B01D27/106 Primary

  Anti-leakage or anti-return valves · CPC title

• F01M2001/1085

  comprising non-return valves · CPC title