# US 2014/0060483 A1 · Throttle body structure

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- Number: US 2014/0060483 A1
- Document ID: US20140060483A1
- Status: Published application
- Kind: A1
- Application number: 13/975,759
- Filed: 2013-08-26
- Published: 2014-03-06
- Earliest claimed: 2012-08-29
- Assignees: Honda Motor Co., Ltd.
- Applicants: Honda Motor Co. Ltd.
- Inventors: Naoto Yamagishi
- Web page: https://patentgrep.com/patent/US20140060483A1

## CPC

- F02D 9/02: concerning induction conduits (throttle valves, or arrangements thereof in conduits F02D9/08)
- F02D 9/1055: {having a fluid by-pass}
- F02D 9/109: {having two or more flaps}
- F02D 31/003: {for idle speed control}
- F02D 31/005: {by controlling a throttle by-pass}
- F02D 41/0002: {Controlling intake air}
- F02M 69/32: with an air by-pass around the air throttle valve or with an auxiliary air passage, e.g. with a variably controlled valve therein
- F02D 41/08: for idling (F02D41/06, F02D41/16 take precedence)
- Y02T 10/40: Engine management systems
- F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W)
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A throttle body structure includes a plurality of throttle bores, an idle air control valve that is provided between the throttle bores, a plurality of bypass passages that extend toward a downstream side of the throttle bores, and bypass ports that are arranged between the throttle bores and supply idle air to throttle bores which are spaced apart from the idle air control valve. Compound bypass passages and third bypass passages are arranged parallel to each other. The third bypass passages communicate with the throttle bores arranged adjacent to the idle air control valve, and the compound bypass passages communicate with the bypass ports.

## Claims

### Claim 1

A throttle body structure comprising: a plurality of throttle bores where at least two or more throttle valves are arranged parallel to each other: an idle air control valve that is provided between the plurality of throttle bores; a plurality of bypass passages that are opened or closed by the idle air control valve and extend toward a downstream side of the throttle bores; and bypass ports that are arranged between the plurality of throttle bores where the idle air control valve is arranged, and supply idle air to throttle bores that are spaced apart from the idle air control valve, wherein
the plurality of bypass passages are arranged parallel to each other, one bypass passage of the plurality of bypass passages communicates with the throttle bores arranged adjacent to the idle air control valve, and the other bypass passages communicate with the bypass ports.

### Claim 2 (depends on 1)

The throttle body structure according to claim 1, wherein the plurality of bypass passages include: first bypass passages that extend toward a downstream side of the throttle bores from a control valve accommodating hole in which the idle air control valve is accommodated; second bypass passages that are provided on the same axis as the first bypass passages and extend toward an upstream side of the throttle bores from the control valve accommodating hole; and a third bypass passages that extend parallel to the first bypass passages, wherein
the second bypass passages and the third bypass passages communicate with each other.

### Claim 3 (depends on 2)

The throttle body structure according to claim 2, wherein communication passages that extends parallel to the throttle bores and communicate with the second bypass passages are provided at positions upstream of the throttle body, and the third bypass passages communicate with the communication passages.

### Claim 4 (depends on 3)

The throttle body structure according to claim 3, wherein the communication passages are formed together with the throttle bores as as-cast holes by casting.

### Claim 5 (depends on 3)

The throttle body structure according to claim 3, wherein the third bypass passages communicate with the throttle bores arranged adjacent to the idle air control valve, and idle screw air passages are provided between the throttle bores and the communication passages and parallel to the throttle bores.

### Claim 6 (depends on 2)

The throttle body structure according to claim 2, wherein the control valve accommodating hole and the bypass ports are formed parallel to each other as as-cast holes by casting.

### Claim 7 (depends on 1)

The throttle body structure according to claim 1, wherein an injector that injects fuel to the throttle bores is mounted on the respective throttle bores formed in the throttle body, a delivery pipe that supplies fuel to the injector is provided, and the bypass ports are arranged more downstream of the throttle body than is the delivery pipe.