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Inlet device

A technology of air intake device and air intake pipe, applied in the direction of charging system, carburetor, engine components, etc., to achieve the effect of reducing fuel amount, improving exhaust gas quality, simple assembly and manufacturing

Active Publication Date: 2010-02-24
ANDREAS STIHL AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This task is solved by the air intake device of the invention

Method used

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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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Abstract

The invention provides an air inlet device comprising an air inlet pipe (9) with an air inlet pipe section (3) which can asway support throttles (7, 24, 37), and the air inlet pipe (9) is divided intoan air pipe (4) and a mixing pipe (5) by separating walls (10, 27, 44) in the downstream of the throttles (7, 24, 37). A fuel nozzle (6) is communicated with the mixing pipe (5). A separating wall inthe upstream of the throttle (37) is formed by a choke cover (39) asway supported in the air inlet pipe (9).

Description

technical field [0001] This application is a divisional application of the Chinese patent application CN03124908.6 with the same name filed on September 18, 2003. [0002] The invention relates to an air intake device, in particular for an internal combustion engine of an engine-driven production tool, such as a motorized chainsaw, cutting machine or the like. Background technique [0003] 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D9/02F02D9/08F02M11/10F02M17/34F02B63/02F02D9/10F02M13/04F02M17/09
CPCF02B63/02F02D9/1025F02M17/09F02D9/109F02D9/1045F02M13/046F02D2009/0272
Inventor R·杰哈迪K·盖尔
Owner ANDREAS STIHL AG & CO KG
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