Title:
GAS-LIQUID SEPARATION DEVICE FOR FOUR-STROKE ENGINE, AND LUBRICATION DEVICE FOR FOUR-STROKE ENGINE
Document Type and Number:
WIPO Patent Application WO/2012/073586
Kind Code:
A1
Abstract:
This oil separator (51), which provides a gas-liquid separation device for a four-stroke engine that more reliably achieves gas-liquid separation of oil and blow-by gas so that oil is not discharged in the combustion chamber, and which provides a lubrication device for a four-stroke engine, has a gas-liquid separation chamber (117) that branches from an oil circulation path, and separates oil mist from blow-by gas containing the oil mist. The gas-liquid separation chamber (117) has: a first opening (103) through which blow-by gas from the oil circulation path is introduced; a second opening (105) for circulating oil separated from the blow-by gas in the oil circulation path; and a third opening (501g) that links an intake passageway to the combustion chamber, and through which blow-by gas, from which the oil mist has been separated, is discharged from the gas-liquid separation chamber. The first opening (103) is formed in a first wall (101), and the third opening (501g) is formed in a second wall (501d). A gas-liquid separation member in the gas-liquid separation chamber (117) is formed between the first opening (103) and the third opening (501g).
Inventors:
TOMITA TOSHIHIRO (JP)
KUBOTA HIROSHI (JP)
KIKUCHI YOSHINARI (JP)
SUGIYAMA KOJI (JP)
KURIMOTO MASAKI (JP)
KUBOTA HIROSHI (JP)
KIKUCHI YOSHINARI (JP)
SUGIYAMA KOJI (JP)
KURIMOTO MASAKI (JP)
Application Number:
PCT/JP2011/072268
Publication Date:
June 07, 2012
Filing Date:
September 28, 2011
Export Citation:
Assignee:
MAKITA CORP (JP)
TOMITA TOSHIHIRO (JP)
KUBOTA HIROSHI (JP)
KIKUCHI YOSHINARI (JP)
SUGIYAMA KOJI (JP)
KURIMOTO MASAKI (JP)
TOMITA TOSHIHIRO (JP)
KUBOTA HIROSHI (JP)
KIKUCHI YOSHINARI (JP)
SUGIYAMA KOJI (JP)
KURIMOTO MASAKI (JP)
International Classes:
F01M13/04; F01M13/00; F02B63/02
Foreign References:
| JPH0676614U | 1994-10-28 | |||
| JPH06336911A | 1994-12-06 | |||
| JP2010248934A | 2010-11-04 | |||
| JP2002276321A | 2002-09-25 | |||
| JP2007263069A | 2007-10-11 | |||
| JPS6446414U | 1989-03-22 | |||
| JPS6441610U | 1989-03-13 |
Attorney, Agent or Firm:
EBISU International Patent Office (JP)
Patent business corporation エビス international patent firm (JP)
Patent business corporation エビス international patent firm (JP)
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