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two stroke engine

An engine and two-stroke technology, which is applied to combustion engines, machines/engines, internal combustion piston engines, etc., can solve problems such as extension, time-consuming processing, and inability to extend the scavenging port.

Active Publication Date: 2018-02-09
HUSQVARNA AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in conventional two-stroke engines, the scavenging passage is formed by a die (press die) that is drawn on the bottom dead center side, so it is not possible to extend the scavenging port when viewed in the axial direction of the cylinder bore. to overlap the air intake
Therefore, there is a problem that the protracted processing of the scavenging port is required, and the processing takes a lot of time.

Method used

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Embodiment Construction

[0026] Below, refer to Figure 1 ~ Figure 6 A description will be given of a two-stroke engine 1 according to an embodiment of the present invention. The two-stroke engine 1 is a piston valve type engine.

[0027] In the following description, the two-stroke engine 1 is simply referred to as "engine 1". In addition, for ease of understanding, the three directions orthogonal to each other are defined as "X direction", "Y direction", and "Z direction", respectively, and the description will be made with appropriate reference. The "X direction" is the left-right direction of the engine 1, and the arrow side is set to the right side. The "Y direction" is the front-rear direction of the engine 1, and the arrow side is referred to as the rear side. The "Z direction" is the vertical direction of the engine 1, and the arrow side is referred to as the upper side.

[0028] The engine 1 includes a cylinder 2, and a crankcase 3 is mounted on the lower side of the cylinder 2. The cylinder 2...

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Abstract

The invention relates to a two-stroke engine. An air inlet (11) and an air outlet are oppositely arranged on the wall face of a cylinder bore (2A) formed on an air cylinder (2); the two-stroke engine comprises a pair of scavenging ports (13), a scavenging window (24) and a scavenging cover (26), wherein the scavenging ports (13) are arranged between the air inlet (11) and the air outlet, and the axes separated by the cylinder bore (2A) are approximately opposite; the scavenging window (24) is communicated with the scavenging ports (13), and openings are arranged on the scavenging window (24) at the positions of the outer side of the air cylinder (2); and the scavenging window (24) is plugged through the outer side of the air cylinder (2). Extending parts (13D) are arranged on the scavenging ports (13) respectively and are arranged on the side of the air inlet (11) in an extending manner, and the extending parts (13D) and the end of the air inlet (11) are overlapped when a person performs observation in the direction of the axis of the cylinder bore (2A).

Description

Technical field [0001] The present invention relates to a two-stroke engine (2-stroke engine), and more particularly to a two-stroke engine for hobby, which is mounted on a wireless control type model and the like. Background technique [0002] Conventionally, in a two-stroke engine, the air-fuel mixture flowing into the crank chamber from the intake port flows through the scavenging passage formed in the cylinder wall as it moves to the bottom dead center side of the piston. The scavenging port is supplied into a cylinder bore (for example, refer to Patent Document 1: Japanese Patent Laid-Open No. 2010-084623). At this time, scavenging is performed in which the inflowing air-fuel mixture squeezes out the exhaust gas in the cylinder bore. If the amount of air-fuel mixture flowing into the cylinder bore in one cycle is increased, the explosive power can be increased to obtain high output. [0003] In amateur two-stroke engines that require high output, as a method to expand the sc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02B25/02
CPCY02T10/12
Inventor 五十岚俊介
Owner HUSQVARNA AB
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