Air intake device for internal combustion engine

• US 20060207570A1
• Filed: 04/15/2004
• Published: 09/21/2006
• Est. Priority Date: 04/18/2003
• Status: Active Grant

• Current Assignee: Keihin Corporation (Hitachi, Ltd.)
• Original Assignee: Keihin Corporation (Hitachi, Ltd.)
• Inventors: Hattori, Shogo
• Granted Patent: US 7,287,502 B2
• Time in Patent Office: Days
• US Class Current: 123/494
• CPC Class Codes: F02D 41/18 by measuring intake air flow
• CPC Class Codes: F02M 35/10249 Electrical or electronic devices fixed to the intake system; Electric wiring electric heaters F02M31/12; sensors F02M35/10373
• CPC Class Codes: F02M 35/10301 Flexible, resilient, pivotally or movable parts; Membranes F02M35/10255 and F02M35/10032 take precedence
• CPC Class Codes: F02M 35/10386 for flow rate air flow meters in air cleaners F02M35/021; circuit arrangements for generating control signals by measuring intake air flow F02D41/18
• CPC Class Codes: F02M 35/104 Intake manifolds
• CPC Class Codes: G01F 1/72 Devices for measuring pulsing fluid flows
• CPC Class Codes: G01F 5/00 Measuring a proportion of the volume flow

Abstract

An air intake apparatus for an internal combustion engine includes an air intake manifold that has a plurality of branch pipes that are connected to an internal combustion engine and has a collecting pipe to which a throttle body is connected, in which an air intake quantity that is taken into the internal combustion engine is adjusted using a throttle valve of the throttle body, and in which a fuel injection quantity is adjusted in accordance with the air intake quantity. In this air intake apparatus for an internal combustion engine, an air flow meter that detects a quantity of air that is taken into the internal combustion engine is provided in each branch pipe of an air intake manifold.

Claims

1. An air intake apparatus for an internal combustion engine comprising:

an air intake manifold that has a plurality of branch pipes that are connected to an internal combustion engine and has a collecting pipe to which a throttle body is connected, in which an air intake quantity that is taken into the internal combustion engine is adjusted using a throttle valve of the throttle body, and in which a fuel injection quantity is adjusted in accordance with the air intake quantity, wherein

an air flow rate sensor that detects a quantity of air that is taken into the internal combustion engine is provided in at least a portion of the plurality of branch pipes.

2. The air intake apparatus for an internal combustion engine according to claim 1, wherein one of the air flow rate sensors is provided in each of the plurality of branch pipes.

3. The air intake apparatus for an internal combustion engine according to claim 1, wherein one of the air flow rate sensors is provided in the collecting pipe.

4. An air intake apparatus for an internal combustion engine comprising:

an air intake manifold that has a plurality of branch pipes that are connected to an internal combustion engine and has a collecting pipe to which a throttle body is connected, in which an air intake quantity that is taken into the internal combustion engine is adjusted using a throttle valve of the throttle body, and in which a fuel injection quantity is adjusted in accordance with the air intake quantity, wherein

an extended portion that extends towards the branch pipe side is provided on an end portion on the branch pipe side of the collecting pipe, and an air flow rate sensor that detects a quantity of air that is taken into the internal combustion engine is provided on this extended portion.