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Engine gas-liquid separation device

A gas-liquid separation device and technology for gas-liquid separation, which are applied in the directions of engine lubrication, engine components, machines/engines, etc., can solve the problems of complicated crankcase shape and large-scale engine, so as to improve the gas-liquid separation effect and reduce the Oil consumption, effect of shape simplification

Inactive Publication Date: 2010-05-19
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art described above, the breather chamber is divided by the concave wall surface formed on the crankcase and the breather box installed on the mounting base, so there is a problem that the breather box protrudes from the surface of the crankcase to increase the size of the engine, and There is also a problem that the shape of the crankcase is complicated because a concave wall surface that partitions a part of the breather chamber is formed inside the crankcase.

Method used

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  • Engine gas-liquid separation device
  • Engine gas-liquid separation device
  • Engine gas-liquid separation device

Examples

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Embodiment 1

[0071] like figure 1 as well as figure 2 As shown, the single-cylinder 4-stroke engine E is arranged such that the cylinder axis L1 is slightly inclined so that the cylinder head 12 and the cylinder head cover 13 side are raised relative to the engine case 11 integrally having the crankcase and the cylinder block. The crankshaft 14 protrudes from one end surface of the engine case 11 , and a recoil starter 16 for rotating and starting the crankshaft 14 is provided on an outer surface of a cover 15 covering the other end surface of the engine case 11 . A carburetor 17 is provided on the side of the cylinder head 12 , and an air intake passage 18 extending upward from the carburetor 17 is connected to an air cleaner 19 . On the top of the cylinder head 12 and the cylinder head cover 13, a muffler 20 is installed in parallel with the air cleaner 19, and a fuel tank 21 is installed at a position closer to the crankcase than the air cleaner 19 and the muffler 20. .

[0072] The...

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Abstract

A bearing holder (66) having a bearing (67) rotatably supporting a crankshaft (14) is fixed so as to face an opening (11k) of the engine case (11). A gas-liquid separation chamber (83) is formed between a cover member (68) covering the opening (11k) and the bearing holder (66). Therefore, by utilizing the bearing holder (66) as a part of the wall surface of the gas-liquid separation chamber (83),the gas-liquid separation chamber (83) can be partitioned without increasing the number of components and without forming a special wall surface in the engine case (11). Thus, it is possible to reducethe size and weight of the engine case (11), and reduce the cost by simplifying the shape thereof and reducing the number of components. Also, a labyrinth 82 is formed by ribs (66d, 66e, 68a, 68d) projecting from the bearing holder (66) and the cover member (68), and therefore gas-liquid separation can be effectively performed by the labyrinth (82). Thus, it is possible to provide a small light gas-liquid separation device with a small number of components.

Description

technical field [0001] The present invention relates to a gas-liquid separation device for an engine for separating oil mist from the air in the engine case. Background technique [0002] Disclosed in the following patent document 1 is such a technology: the installation seats of the breather case (breather case) of the breather device with the gas-liquid separation function are respectively arranged on the top wall and the peripheral wall of the crankcase of the engine, and according to the use of the engine The form installs the breather box on the one of the two mounts where oil droplets are less likely to adhere. [0003] Patent Document 1: Japanese Publication No. 62-12820 [0004] However, in the prior art described above, the breather chamber is divided by the concave wall surface formed on the crankcase and the breather box installed on the mounting base, so there is a problem that the breather box protrudes from the surface of the crankcase to increase the size of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02F7/00F01M9/06F01M9/10F01M11/08F01M13/00F01M13/04
Inventor 佐藤义一川口升
Owner HONDA MOTOR CO LTD
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