# US 2021/0340940 A1 · Engine air intake device

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- Number: US 2021/0340940 A1
- Document ID: US20210340940A1
- Status: Published application
- Kind: A1
- Application number: 17/274,023
- Filed: 2019-09-03
- Published: 2021-11-04
- Earliest claimed: 2018-09-11
- Assignees: Mazda Motor Corporation
- Applicants: Mazda Motor Corporation
- Inventors: Shin KODAMA; Kenji SUGASAKI; Hiromasa NAKAGAWA
- Web page: https://patentgrep.com/patent/US20210340940A1

## CPC

- F02M 35/10013: {Means upstream of the air filter; Connection to the ambient air}
- F02M 35/10144: {Connections of intake ducts to each other or to another device}
- F02B 77/13: Acoustic insulation
- F02M 35/048: {Arranging or mounting on or with respect to engines or vehicle bodies}
- F02M 35/10: Air intakes; Induction systems
- F02M 35/10091: {characterised by details of intake ducts: shapes; connections; arrangements (ducts within or on the plenum chamber F02M35/10039)}
- F02M 35/10288: {Air intakes combined with another engine part, e.g. cylinder head cover or being cast in one piece with the exhaust manifold, cylinder head or engine block}
- F02M 35/10354: {Joining multiple sections together (joining plastic materials together in general B29C65/00)}
- F02M 35/161: {Arrangement of the air intake system in the engine compartment, e.g. with respect to the bonnet or the vehicle front face}
- F02F 7/0065: {Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety}
- F02M 31/042: {Combustion air}
- F02M 35/10157: {Supercharged engines}
- Y02T 10/12: Improving ICE efficiencies
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G)
- F02F: CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A cover covering an engine and an intake duct for introducing fresh air outside an engine room into a combustion chamber of the engine are provided in the engine room. The cover includes a top face cover portion covering the engine from above, and a side face cover portion covering the engine from the lateral side. The intake duct is disposed so as to be continuous to a side edge of the side face cover portion such that the intake duct covers the engine from the lateral side together with the side face cover portion.

## Claims

### Claim 1

An air intake device for an engine, comprising:
a cover provided inside an engine room and covering the engine; and
an intake duct for introducing fresh air outside the engine room into a combustion chamber of the engine, wherein
the cover comprises a top face cover portion covering the engine from above, and a side face cover portion covering the engine from a lateral side, and
the intake duct is disposed so as to be continuous to a side edge of the side face cover portion such that the intake duct covers the engine from the lateral side together with the side face cover portion.

### Claim 2 (depends on 1)

The air intake device for an engine according to claim 1, wherein
the engine room is provided in a front portion of a vehicle,
the engine is a front intake and rear exhaust engine, and
the intake duct is disposed so as to be continuous to a side edge on a front side of the side face cover portion.

### Claim 3 (depends on 2)

The air intake device for an engine according to claim 2, wherein the intake duct and the side face cover portion are coupled together by a fastening member.

### Claim 4 (depends on 3)

The air intake device for an engine according to claim 3, wherein the fastening member is a clip having a retainer.

### Claim 5 (depends on 1)

The air intake device for an engine according to claim 1, wherein
the intake duct comprises an outside air introduction duct portion for introducing outside air which is air outside the engine room into the combustion chamber, and an inside air introduction duct portion for introducing inside air which is air inside the engine room into the combustion chamber, and is a composite duct in which the outside air introduction duct portion and the inside air introduction duct portion are connected to one downstream duct portion, the downstream duct portion having a downstream end connected to an air cleaner,
the engine room is provided in a front portion of a vehicle,
the air cleaner is disposed on a right outer side of the cover as viewed from a vehicle front side, and
the intake duct is disposed on an outside of the cover and on a front side of the air cleaner, and covers the engine from a right side.

### Claim 6 (depends on 5)

The air intake device for an engine according to claim 5, wherein
the outside air introduction duct portion has an upstream end that is provided with an outside air inlet open forward and having a horizontally long rectangular shape,
the inside air introduction duct portion has an upstream end that is provided with an inside air inlet open upward and having a horizontally long rectangular shape, and
the downstream duct portion has a downstream end having a connection port open rearward and connected to the air cleaner.

### Claim 7 (depends on 5)

The air intake device for an engine according to claim 5, wherein
the outside air introduction duct portion, at a higher position than the inside air inlet of the inside air introduction duct portion, has a duct wall curved toward the inside air introduction duct portion side and extending forward diagonally across above the inside air inlet.

### Claim 8 (depends on 4)

The air intake device for an engine according to claim 4, wherein
the side face cover portion comprises a right-side face cover portion covering the engine from a right side,
the intake duct comprises a protrusion protruding rearward and extending in an up-down direction,
the right-side face cover portion comprises a mounting piece protruding forward relative to an upper end of a front end edge of the right-side face cover portion, and
the mounting piece is fixed to an upper end of the protrusion of the intake duct by a clip having a retaining function as a fastening member.