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Two-stroke engine

An engine, two-stroke technology, applied in the direction of engine components, machines/engines, mechanical equipment, etc., to achieve the effect of suppressing the change of engine speed and suppressing the stop of the engine

Inactive Publication Date: 2010-06-09
HUSQVARNA ZENOAH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the engine of said Patent Document 1, there is still room for improvement in suppressing the variation in the rotation speed.

Method used

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  • Two-stroke engine
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Examples

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Embodiment Construction

[0022] Hereinafter, an embodiment of the present invention will be described in detail based on the drawings.

[0023] figure 1 It is an exploded perspective view showing main parts of the two-stroke engine 1 of the present embodiment.

[0024] The two-stroke engine 1 of the present embodiment is a small engine of about 18 cc, and is suitable for portable work machines such as chain saws and chop saws. This engine 1 comprises: engine body 2 ( figure 1 Only the cylinder portion is shown in the figure), the unshown carburetor and the inlet pipe 3 connecting the carburetor and the engine body 2 together.

[0025] The engine body 2 has a crankcase not shown, a cylinder 21, a small and lightweight flywheel, etc., and can achieve weight reduction. On the cylinder 21 are formed a mounting portion 22 to which the intake pipe 3 is mounted, an engine body intake flow path 23 and an engine body pulsation transmission flow path 24 communicating with the crankcase chamber. The engine b...

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Abstract

The invention relates to a two-stroke engine. A through hole (55) formed on an atomization pipe (5) can be used to seal the fuel which sticks to the inner wall (46) of the through hole (55). In addition, when the fuel which sticks to the inner surface of the atomization pipe (5) flows to the downstream side, the fuel can be ensured to be sealed in the through hole (55). And an absorption part (62) can be used to absorb the fuel which sticks to the inner wall (46) on the downstream side of the atomization pipe (5) and flows to the downstream side. Furthermore, as the marginal part (74) of an air inlet path hole (72) of a spacer (7) extrudes from the inner wall (46), the fuel which is not absorbed by the absorption part (62) can not flow to the downstream side. Therefore, the quick increase of the amount of the fuel which flows in an engine body (2) can be reliably inhibited and the change of the engine speed can be fully inhibited.

Description

technical field [0001] The invention relates to a two-stroke engine. Background technique [0002] Conventionally, a known two-stroke engine includes: an engine body, a carburetor, and an inlet pipe connecting the engine body and the carburetor. Since this type of two-stroke engine is simple in structure and light in weight, it is mostly mounted on portable work machines such as chainsaws. [0003] In this type of engine, the fuel component in the gas mixture adheres to the inner wall of the intake pipe. In addition, in this kind of engine, when the negative pressure in the intake pipe increases, the fuel (fuel component) is sucked into the engine body at once, so the inflow into the engine body until the standard fuel amount is supplied The amount of fuel will be too much, the revs will be reduced, and it will become unstable. Periodically, such engines will ingest large amounts of fuel. In addition, such rotation speed fluctuations also occur due to changes in the post...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B63/02F02M29/14F02M35/10
Inventor 杉下悠
Owner HUSQVARNA ZENOAH