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Inlet device

A technology of air intake device and air intake pipe, which is applied in the direction of charging system, combustion engine, machine/engine, etc., can solve the problems of engine fuel consumption increase, exhaust gas quality deterioration, etc., achieve fuel reduction, exhaust gas quality improvement, The effect of simple assembly and fabrication

Inactive Publication Date: 2004-05-12
ANDREAS STIHL AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the exhaust gas quality deteriorates
At the same time the fuel consumption of the engine increases

Method used

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  • Inlet device
  • Inlet device
  • Inlet device

Examples

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Embodiment Construction

[0022] exist figure 1 An air inlet device 26 with an air inlet duct 9 is shown in FIG. An intake line section 3 of the intake line 9 is in a carburetor 1 . The carburetor 1 has a carburetor housing 2 and serves to supply a fuel / air mixture and largely fuel-free combustion air to an internal combustion engine. The internal combustion engine is in particular a two-stroke engine in which the combustion air is used as flushing air for the tank to separate the exhaust gas from the fuel / air mixture flowing backwards in the combustion chamber. Flow through the carburetor 1 in the flow direction 20 . An air filter is preferably arranged upstream of the carburetor 1 . A throttle valve 7 is mounted pivotably by a throttle shaft 8 in the intake line section 3 . The intake duct 9 is divided into an air duct 4 and a mixing duct 5 upstream of the throttle valve 7 by a partition wall 16 and downstream of the throttle valve 7 by a partition wall 10 . Downstream of the throttle valve 7 , ...

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PUM

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Abstract

An intake device having an intake channel that includes an intake channel section is provided. A butterfly valve is pivotably mounted in the intake channel section. A dividing wall is disposed downstream of the butterfly valve and divides the intake channel section into an air duct and a mixture duct. The air duct has a flow cross-section that is greater than the flow cross-section of the mixture duct. A fuel jet opens into the mixture duct.

Description

technical field [0001] The invention relates to an air intake device of the type stated in the preamble of claim 1, in particular for an engine-driven production tool such as an internal combustion engine of a motorized chain saw, a cutting machine, etc. . Background technique [0002] An air intake device is known from EP 1 221 545 A2, in which the air intake line is divided into an air line and two mixing lines. A partition wall is provided for this purpose, which extends substantially downstream of the throttle valve and divides the intake duct in the middle. Consequently, the flow cross-sections in the air duct and the mixing duct are approximately equal in size. The largely fuel-free air supplied to the engine via the air duct serves to separate the exhaust gases escaping from the combustion chamber of the engine from the fuel / air mixture flowing backward. If too little air is supplied to the internal combustion engine, the mixture cannot be separated cleanly from th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B63/02F02D9/02F02D9/10F02M13/04F02M17/09
CPCF02B63/02F02D9/1025F02M17/09F02D9/109Y10S261/01F02D9/1045F02M13/046F02D2009/0272
Inventor R·杰哈迪K·盖尔
Owner ANDREAS STIHL AG & CO KG