Air filter cartridge with internal structure

Patent metadata

Field	Value
Publication number	US-10814265-B2
Application number	US-201616061286-A
Country	US
Kind code	B2
Filing date	Nov 30, 2016
Priority date	Dec 11, 2015
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

An air filter cartridge (1) for an air intake system for a vehicle engine extends along a main axis (X-X). The air filter cartridge includes a filter element (5), suitable to filter the air sucked through the filter eleemtn and having extension along the main axis (X-X) and an internal structure (3) that extends inside of the filter element (5). The internal structure (3) identifies a plurality of ducts (30) fluidically independent from each other through which the filtered air flows separately. Each duct (30) extends between an inlet mouth (31), placed in proximity of a respective filter element portion (51), and an outlet mouth (32) placed in proximity of the head element (2) in such a way as to induce the intake of air through each duct (30) through the respective portion of the filter element (51).

First claim

The invention claimed is:

1. Air filter cartridge of an air intake system of an engine for a vehicle wherein in said air intake system, air is sucked through said filter cartridge so filtered air arrives at an engine of the vehicle, wherein the air filter cartridge has a body extending longitudinally along a main axis having a substantially tubular shape, said cartridge comprising:
a head element located at one end of the filter cartridge fluidic connecting the cartridge with the air intake system;
a filter element, comprising a filter wall, filtering the air sucked through the filter element and having extension along the main axis starting from the head element;
an internal structure extending in length from said head element to inside of the filter element, identifying a plurality of ducts fluidically independent from each other through which the filtered air flows separately;
wherein each duct extends between an inlet mouth proximate the filter wall and an outlet mouth placed proximate the head element;
wherein the internal structure induces intake of air through each duct through the filter wall identifying for each duct a respective portion of the filter element faced to the inlet mouth to suck the air through the respective filter element portion through the respective duct;
wherein the internal structure has a substantially axisymmetric shape with respect to the main axis;
wherein the inlet mouths, respectively of each duct, are positioned side by side axially along the main axis, each inlet mouth extends concentrically with respect to the main axis;
each duct comprises a linear section extending parallel to an axis of the extension concentric to an adjacent duct forming an annular tubular section for at least one of said ducts; and
wherein the head element comprises coupling openings and the filter element comprises a coupling structure with coupling teeth engaging with said coupling openings.

2. Air filter cartridge according to claim 1 , wherein the filter element comprises a filter wall, comprising said filter element portions, formed in one piece.

3. Air filter cartridge according to claim 2 , wherein the filter wall is made of a fibrous material selected from the group consisting of: polymeric fibres or a non-woven material.

4. Air filter cartridge according to claim 1 , wherein the ducts in the portion of the duct next to the inlet mouth have a section transverse to the main axis, which tapers away from the filter wall.

5. Air filter cartridge according to claim 1 , wherein the ducts in a vicinity of the respective inlet mouth have at least one wall delimiting the ducts that extends for a curved section.

6. Air filter cartridge according to claim 1 , wherein the head element and the internal structure are engaged with each other so the head element supports internal structure, wherein the filter element fits on the internal structure and is fixed to the head element.

7. Air filter cartridge according to claim 1 , wherein the internal structure is suitable to support the filter element along the main axis, wherein the inlet mouths lay internally on the filter wall.

8. Air filter cartridge according to claim 1 , wherein the head element and the filter cartridge are made in a single integral piece of a polymeric material.

9. Air filter cartridge according to claim 1 , wherein engagement between teeth and openings comprises a snap coupling while disengagement is obtained by rotation.

10. Air intake system of the engine of a vehicle comprising an air filter cartridge according to claim 1 .

11. Air filter cartridge of an air intake system of an engine for a vehicle wherein in said air intake system, air is sucked through said filter cartridge so filtered air arrives at an engine of the vehicle, wherein the air filter cartridge has a body extending longitudinally along a main axis having a substantially tubular shape, said cartridge comprising:
a head element located at one end of the filter cartridge fluidic connecting the cartridge with the air intake system;
a filter element, comprising a filter wall, filtering the air sucked through the filter element and having extension along the main axis starting from the head element;
an internal structure extending in length from said head element to inside of the filter element, identifying a plurality of ducts fluidically independent from each other through which the filtered air flows separately;
wherein each duct extends between an inlet mouth proximate the filter wall and an outlet mouth placed proximate the head element;
wherein the internal structure induces intake of air through each duct through the filter wall identifying for each duct a respective portion of the filter element faced to the inlet mouth to suck the air through the respective filter element portion through the respective duct;
wherein the internal structure has a substantially axisymmetric shape with respect to the main axis;
wherein the inlet mouths, respectively of each duct, are positioned side by side axially along the main axis, each inlet mouth extends concentrically with respect to the main axis;
each duct comprises a linear section extending parallel to an axis of the extension concentric to an adjacent duct forming an annular tubular section for at least one of said ducts; and
wherein each duct extends along the main axis for a predefined length, wherein the outlet mouth of a duct is axially offset with respect to an axial position of the outlet mouth of another duct.

12. Air filter cartridge according to claim 11 , wherein the outlet mouth of a radially more central duct is located at a height along the main axis lower with respect to a height at the outlet mouth of a duct radially adjacent to the radially more central duct is located.

13. Air filter cartridge of an air intake system of an engine for a vehicle wherein in said air intake system, air is sucked through said filter cartridge so filtered air arrives at an engine of the vehicle, wherein the air filter cartridge has a body extending longitudinally along a main axis having a substantially tubular shape, said cartridge comprising:
a head element located at one end of the filter cartridge fluidic connecting the cartridge with the air intake system;
a filter element, comprising a filter wall, filtering the air sucked through the filter element and having extension along the main axis starting from the head element;
an internal structure extending in length from said head element to inside of the filter element, identifying a plurality of ducts fluidically independent from each other through which the filtered air flows separately;
wherein each duct extends between an inlet mouth proximate the filter wall and an outlet mouth placed proximate the head element;
wherein the internal structure induces intake of air through each duct through the filter wall identifying for each duct a respective portion of the filter element faced to the inlet mouth to suck the air through the respective filter element portion through the respective duct;
wherein the internal structure has a substantially axisymmetric shape with respect to the main axis;
wherein the inlet mouths, respectively of each duct, are positioned side by side axially along the main axis, each inlet mouth extends concentrically with respect to the main axis;
each duct comprises a linear section extending parallel to an axis of the extension concentric to an adjacent duct forming an annular tubular section for at least one of said ducts; and
wherein the filter element comprises a tip at an end opposite head element of hemispherical shape, and the internal structure comprises a tip element inter

Assignees

• Ufi Filters Spa

Inventors

• Girondi Giorgio

Classifications

• F02M35/02433

  Special alignment with respect to the air intake flow, e.g. angled or in longitudinal flow direction · CPC title

• F02M35/0215

  arranged in parallel · CPC title

• F02M35/02483

  Cylindrical, conical, oval, spherical or the like filter elements; wounded filter elements · CPC title

• B01D46/4281

  Venturi's or systems showing a venturi effect · CPC title

• B01D46/0049

  containing fixed gas displacement elements or cores · CPC title