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Carburetor

A technology for carburetors and air intake passages, applied to carburetors, machines/engines, engine components, etc., can solve problems such as difficulty in passing exhaust emission regulations, inability to perform fuel metering and supply correctly, and increased costs, so as to reduce power consumption low power consumption, simple structure, and improved output performance

Inactive Publication Date: 2015-03-18
KEIHIN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such a carburetor, since the fuel tank, the fuel pump, and the fuel injection valve are simply connected by fuel passages, when steam is generated in the fuel passages at high temperatures, due to the vapor lock phenomenon, (vapor lock) makes it impossible to correctly measure and supply fuel from the fuel injection valve to the fuel nozzle, and it is difficult to pass the exhaust emission regulations
In addition, due to the need for relatively expensive fuel pumps and fuel injection valves, the cost will inevitably increase

Method used

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Embodiment Construction

[0028] Embodiments of the present invention will be described below based on the drawings.

[0029] First, in figure 1 and figure 2 Among them, the carburetor C is used for a single-cylinder engine, or is provided for each cylinder of a multi-cylinder engine. The carburetor C includes a carburetor body 1 having a horizontal air intake passage 2 connected to the air intake port of the engine E, and a float room (float room) that is airtightly joined to the lower end surface of the carburetor body 1 and partitioned therebetween. 4 of the float chamber body 5. The float chamber body 5 is detachably fastened on the carburetor body 1 by bolts.

[0030] In the intake passage 2 , a Venturi tube 3 is disposed at the center thereof, and a butterfly valve-type throttle valve 6 is disposed upstream of the Venturi tube 3 .

[0031] The carburetor body 1 integrally has a fuel boss (boss) 1a protruding into the float chamber 4 from the central part of the lower surface thereof, and a f...

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PUM

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Abstract

A carburetor comprises an intake path, a constant volume fuel chamber and a fuel nozzle. The intake path is connected to an intake port of an engine, and is opened and closed by a throttle valve. The constant volume fuel chamber is provided below the intake path, constantly stores a certain amount of fuel, and has an upper space connected to an air vent. An upper end of the fuel nozzle opens to the intake path to spray fuel of the constant volume fuel chamber to the intake path. The fuel nozzle is connected to a fuel passage communicating to the underneath of a fuel level of the constant volume fuel chamber, and a fuel pump which feeds fuel to the fuel nozzle is interposed in the fuel passage.

Description

technical field [0001] The invention relates to an improvement of a carburetor. The carburetor includes an air intake channel, a quantitative fuel chamber and a fuel nozzle. The air intake channel is connected to the air intake port of the engine and is opened and closed by a throttle valve. Below, a certain amount of fuel is always stored, and has an upper space connected to an air vent passage, and the upper end of the fuel nozzle opens to the intake passage to inject the fuel of the quantitative fuel chamber into the intake passage. Background technique [0002] The above-mentioned vaporizer is known as described in Patent Document 1 below. [0003] prior art literature [0004] patent documents [0005] [Patent Document 1] JP-A-7-293342 [0006] [Patent Document 2] JP-A-2000-303927 [0007] Summary of the invention [0008] The problem to be solved by the invention [0009] In a conventional carburetor, as disclosed in Patent Document 1, when metering the injection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M7/16
CPCF02M37/0023F02M7/08F02M5/00
Inventor 赤羽根明
Owner KEIHIN CORP
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