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Air input device for fuel injection engine

A technology of fuel injection and air intake device, which is applied in the directions of fuel injection device, low pressure fuel injection, low pressure fuel injection, etc., can solve the problems of hindering fuel injection, increasing cost, and increasing the cost of idle air quantity control device, and achieving cost reduction , the effect of stable idle speed

Inactive Publication Date: 2008-07-02
AISAN IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when an idle air volume control device is installed in a fuel injected engine, the cost has to be increased
In addition, the increase in the cost of the idle air volume control device is one of the factors that hinder the electronically controlled fuel injection (FI) of motorcycle engines.

Method used

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  • Air input device for fuel injection engine
  • Air input device for fuel injection engine
  • Air input device for fuel injection engine

Examples

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Embodiment 1

[0020] Example 1 of the present invention will be described. This embodiment is suitable for a fuel injection engine for a motorcycle. First, an engine system of a fuel injection engine will be described. In addition, FIG. 1 is a schematic configuration diagram showing an engine system.

[0021] As shown in FIG. 1 , an engine system 10 mounted on a vehicle (such as a "motorcycle") has a fuel tank 12 for storing fuel. A fuel pump 13 disposed in the fuel tank 12 sucks and pressurizes fuel stored in the fuel tank 12 through a fuel filter 14 , and supplies the fuel to a fuel injection valve 37 (described later) through a fuel passage 15 . In addition, the fuel pump 13 is driven and controlled by an ECU 62 (described later). In addition, the pressure of the fuel supplied to the fuel injection valve 37 is adjusted to a predetermined pressure by the pressure regulator 17 . The fuel tank 12, the fuel pump 13, and the fuel passage 15 constitute a "fuel supply device" referred to in...

Embodiment 2

[0059] Embodiment 2 of the present invention will be described below. In the present embodiment, a part of the engine system 10 (see FIG. 1 ) of the first embodiment described above is changed, so the changed parts will be described in detail, and redundant description will be omitted. In addition, FIG. 5 is a schematic configuration diagram showing an engine system.

[0060] As shown in FIG. 5 , in this embodiment, the throttle body 32 in the engine system of the first embodiment (see FIG. 1 ) is changed to a throttle body 322 in which the bypass passage 40 is omitted.

[0061] In the present embodiment, the idle speed is controlled by the ECU 62 in a state where the throttle valve 33 is opened at a predetermined degree and the intake air flow rate is kept constant. Here, the predetermined opening degree of the throttle valve 33 means, for example, an opening degree at which an intake air amount corresponding to the intake air amount flowing through the bypass passage 40 in ...

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Abstract

There is provided an air inlet unit for fuel injection type engine omitting idle speed air capacity control device and reducing cost. The device includes: a choker body (32) of part of a connection channel (31) connecting with the fuel chamber (39) of the engine (20), a choker (33) for openning and closing the air inlet channel (31) of the choker body (32), a fuel injection valve (37) for injecting fuel into the air inlet channel (31), a fuel supply device for supplying fuel to the fuel injection valve (37), an ECU (control device) (62) for controlling fuel injection capacity to the fuel injection valve (37). Setting a by-pass channel (40) on the choker body (32), which bypasses the choker (33) and flows over intake air with prescribed capacity. Under the state of closing fully the choker (33) and invariablenes of air inlet flow quantity, the idle speed rotary speed is controlled by the ECU (62).

Description

technical field [0001] The present invention mainly relates to an air intake device of a fuel injection engine of vehicles such as automobiles and motorcycles. Background technique [0002] Conventionally, in the cold state of the engine, since the mechanical loss of the internal combustion engine is large, it is difficult to ensure the idle speed in the cold state. Therefore, especially in fuel injection engines, an idle air volume control device for controlling the idle air volume, such as an idle speed control valve (hereinafter referred to as "ISC valve") and an automatic starter, is provided. The idle air volume control device ensures the idle speed by increasing the intake air volume at idle in cold conditions. In addition, Patent Document 1 describes an ISC valve. In addition, Patent Document 2 describes an automatic starter. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2005-351191 [0004] Patent Document 2: Japanese Patent Application Laid-Open No. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M69/32
Inventor 村上广道浜田干生和田里美
Owner AISAN IND CO LTD
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