Hood of a multi cyclone block of an air cleaner and air cleaner

Patent metadata

Field	Value
Publication number	US-10570859-B2
Application number	US-201715688117-A
Country	US
Kind code	B2
Filing date	Aug 28, 2017
Priority date	May 29, 2015
Publication date	Feb 25, 2020
Grant date	Feb 25, 2020

Abstract

The present invention relates to a hood (40) of a multi cyclone block (12) and an air cleaner (10). The cyclone block (12) has a plurality of cyclone cells (28). The hood (40) having at least one hood-inlet (50) and at least one hood-outlet (52) for air to be fed to the cyclone cells (28). The at least one hood-outlet (52) is designed for surrounding, a plurality of cell-inlets (36) of the cyclone cells (28) of the cyclone block (12). A wall (70) of the hood (40) defines a distributor volume (72) inside the hood (40), which is located between the at least one hood-inlet (50) and the at least one hood-outlet (52). The wall (70) has at least one line or area of inflection (74), where at least one inner surface of the wall (70) changes its curvature.

First claim

What is claimed is:

1. A hood of a multi-cyclone block of an air cleaner of an intake system of an internal combustion engine, wherein the multi-cyclone block includes a plurality of cyclone cells, the hood comprising:
at least one hood-inlet;
at least one hood-outlet for air to be fed into the plurality of cyclone cells;
wherein the at least one hood-outlet surrounds a plurality of cyclone cell inlets of the plurality of cyclone cells of the cyclone block;

a wall defining a distributor volume inside of the hood, the wall arranged between the at least one hood-inlet and the at least one hood-outlet;
wherein an inner surface of the wall of the hood includes multiple curves on the at least the inner surface in a flow direction of a main flow path from the at least one hood-inlet to the at least one hood-outlet;
wherein the inner surface of the wall has an S-shaped profile;
wherein the S-shaped profile includes:
a first concavity formed by the inner surface of the wall extending in the flow direction from the at least one hood-inlet in direction towards the at least one hood-outlet;
a first convexity formed by the inner surface of the wall at an end of the first concavity;
second concavity formed by the inner surface of the wall extending in the flow direction from an end of the first convexity towards the at least one hood-outlet;
wherein the first concavity, first convexity and the second concavity connect to form a portion of the S-shaped profile;

wherein the hood is formed of a synthetic rubber or molded plastic.

2. The hood according to claim 1 , wherein
the hood inlet at its inlet side defines a first plane and a first flow cross-section;
wherein the hood at its outlet side defines a second plane and a second flow cross-section;
wherein the first plane with the first flow cross-section on the inlet side of the at least one hood-inlet is inclined to the second plane with the second flow cross-section on the outlet side of the at least one hood-outlet.

3. The hood according to claim 1 , wherein
a first flow cross-section of the at least one hood-inlet is smaller than a second flow cross-section of the at least one hood-outlet.

4. The hood according to claim 2 , wherein
a profile of the first flow cross-section of the at least one hood-inlet is different or equal to a profile of second flow cross-section of the at least one hood-outlet;
wherein the profile of the at least one hood-inlet is round or oval and the profile of the at least one hood-outlet is oval or round.

5. The hood according to claim 1 , wherein
the at least one hood-inlet is arranged on a short side or on a long side of an oblong hood-outlet.

6. The hood according to claim 2 , wherein
the hood is asymmetrical with respect to a center axis of the at least one hood-outlet, the center axis perpendicular to the second plane.

7. The hood according to claim 1 , wherein
the at least one hood-outlet has a connection section configured to connect onto a corresponding connection section on an inlet side of the cyclone block.

8. The hood according to claim 1 , wherein
the hood comprises a fastening member of at least one snap-fit and/or at least one hose clamp configured to fasten the at least one hood-outlet onto the cyclone block.

9. The hood according to claim 1 , wherein
the molded plastic comprises carbon fibers or glass fibers up to 50 percent by weight.

10. An air cleaner of an intake system of an internal combustion engine, wherein
the air cleaner includes
at least one multi cyclone block comprising a plurality of cyclone cells; and
a hood;

wherein the hood includes
at least one hood-inlet connected to air-ducting air flow through an interior of the hood into a plurality of cyclone cell inlets of the plurality of cyclone cells;
at least one hood-outlet conducting air into the cyclone cells;
wherein the at least one hood-outlet surrounds a plurality of cyclone cell inlets of the plurality of cyclone cells of the cyclone block;

wherein the hood includes a wall defining a distributor volume inside of the hood, the wall arranged between the at least one hood-inlet and the at least one hood-outlet; and
wherein the wall includes at least one line or area of inflection where an inner surface of the wall changes its curvature;
wherein the inner surface of the wall of the hood includes multiple curves on the at least the inner surface in a flow direction of a main flow path from the at least one hood-inlet to the at least one hood-outlet;
wherein the inner surface of the wall has an S-shaped profile;
wherein the S-shaped profile includes:
a first concavity formed by the inner surface of the wall extending in the flow direction from the at least one hood-inlet in direction towards the at least one hood-outlet;
a first convexity formed by the inner surface of the wall at an end of the first concavity;
second concavity formed by the inner surface of the wall extending in the flow direction from an end of the first convexity towards the at least one hood-outlet;
wherein the first concavity, first convexity and the second concavity connect to form a portion of the S-shaped profile;

wherein the hood is formed of a synthetic rubber or molded plastic.

11. The air cleaner according to claim 10 , wherein
the plurality of cyclone cells on the cyclone block are arranged parallel to a central main axis of the filter, such that the plurality of cyclone cells and the air filter form an in-line system aligned on the central main axis;
wherein the hood-outlet includes a first connection section that radially surrounds and connects onto a radially outer surface of a mating second connection section of the cyclone block, the first connection section including:
a radially outwardly projecting flange formed on a radially outer surface of the first connection section on a terminating end of the hood at the hood outlet;
a circumferential notch formed into a radially inner surface of the first connection section and extending circumferentially around the central main axis,
wherein the circumferential notch is receives and engages a radially outwardly projecting collar formed on the mating second connection section of the cyclone block;

a clamp retaining section arranged on the radially outer surface of the first connection section between the circumferential notch and the terminating end of the hood;
a hose clamp arranged on the clamp retaining section and compressing the first connection section of the hood-outlet onto the mating second connection section of the cyclone block.

12. The air cleaner according to claim 10 , wherein
the molded plastic comprises carbon fibers or glass fibers up to 50 percent by weight.

Assignees

• Mann & Hummel Gmbh

Inventors

• Navaliger Anand
• Henchinamane Channabasappa Anil Kumar
• Vinoth Kumar Kannimuthu Rajamanickam

Classifications

• F02M35/08

  with means for removing dust, {particles or liquids} from cleaners; with means for indicating clogging; with by-pass means; {Regeneration of cleaners} · CPC title

• F02M35/0202

  Manufacturing or assembling; Materials for air cleaner housings · CPC title

• F02M35/0216

  arranged in series, e.g. pre- and main filter in series · CPC title

• B04C3/04

  Multiple arrangement thereof {(combined with types according to other groups, B04C7/00)} · CPC title

• B04C3/06

  Construction of inlets or outlets to the vortex chamber · CPC title