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Two-stroke motor with improved silencer and adapted motor management

A two-stroke, muffler technology that is used in mufflers, exhaust treatment, machines/engines, etc. to overcome knock levels and increased temperature levels

Active Publication Date: 2012-09-19
MAKITA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in delayed combustion that may start too late

Method used

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  • Two-stroke motor with improved silencer and adapted motor management
  • Two-stroke motor with improved silencer and adapted motor management
  • Two-stroke motor with improved silencer and adapted motor management

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0062] stated above figure 1 , this figure corresponds to a two-stroke motor 100 with a muffler 10 designed as a single chamber according to conventional design.

[0063] figure 2 Shown is a two-stroke motor 100 intended eg for a hand-operated power tool such as a garden care tool, or for a moped, boat or the like. The two-stroke motor 100 is equipped with a silencer 10 having a silencer inlet 11 to which a flow channel 12 designed as a straight pipe is connected. The flow passage 12 is mounted to the outlet of the combustion chamber 13 of the two-stroke motor 100 , which is movably defined by the piston 21 , with the muffler inlet 11 . The piston 21 is connected via a connecting rod 23 to a crankshaft 22 of the two-stroke motor 100 , which is rotatably carried in a crankshaft housing 24 . The piston 21 is shown in the region of bottom dead center, so that the muffler inlet 11 is opened and exhaust gases can flow via the muffler inlet 11 to the flow channel 12 .

[0064] ...

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PUM

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Abstract

The present invention relates a two-stroke motor with an improved silencer and adapted motor management. The invention provides the two-stroke motor, more particularly for a hand operated power tool such as a gardening or park-tending device or for a moped, a boat motor or suchlike, with a silencer, whereby the silencer has a silencer inlet to which a flow channel connects, and the flow channel is so flow-beneficially designed between the silencer inlet and the first chamber that due to its mass inertia the exhaust gas flowing into the silencer inlet predominantly flows into the first chamber and after filling the first chamber flows back again thereby forming a counter-pressure in the direction of the combustion chamber, so that operating parameters of the motor equal to the operating parameters generated during operation of the two-stroke motor with the structure limited to that a second chamber enables the flow channel to be open to the silencer of the second chamber after passing through the channel openning, and it is proposed to set the ignition time for igniting a fuel-air mixture present in the combustion chamber at an earlier time before the dead centre of a piston defining the combustion chamber in terms of stroke movement, compared with the ignition time of a two-stroke motor operated with a silencer structurally limited to the second chamber.

Description

technical field [0001] The present invention relates to two-stroke motors, and more particularly to motors for hand-operated power tools such as garden care equipment, or motors for mopeds, marine motors, etc., having a muffler having a muffler inlet through which the flow A channel is connected to this muffler inlet so that a flow channel can be attached to the outlet of the combustion chamber of a two-stroke motor by means of the muffler inlet, wherein the flow channel opens out at the end of the channel opposite the muffler inlet into) a first chamber, a second chamber is also provided, the exhaust gas flows into the second chamber via the main outlet branched from the flow channel, the first chamber is preferably surrounded by the second chamber, and the muffler inlet is connected to the first chamber The flow channels between the mufflers are designed to facilitate the flow in such a way that the exhaust gas flowing into the muffler mainly flows into the first chamber due...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02P5/15F01N1/06F01N13/00F02B77/08
CPCF02N2200/021F02N2200/023F02D41/0097F01N2490/04F01N1/089F01N2590/06F01N3/00F02P5/00Y02T10/46F01N1/08F01N2490/16F01N2590/04F01N2260/14F02P5/1502F02D2400/06F02P5/152F02D41/009F02D2200/021F02D2400/04Y02T10/40
Inventor 迈克尔·肖恩菲尔德
Owner MAKITA CORP