JPS57140519A - Two-cycle engine - Google Patents

Two-cycle engine

Info

Publication number
JPS57140519A
JPS57140519A JP2578281A JP2578281A JPS57140519A JP S57140519 A JPS57140519 A JP S57140519A JP 2578281 A JP2578281 A JP 2578281A JP 2578281 A JP2578281 A JP 2578281A JP S57140519 A JPS57140519 A JP S57140519A
Authority
JP
Japan
Prior art keywords
scavenging
port
scavenging air
facing
cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2578281A
Other languages
Japanese (ja)
Other versions
JPS6048609B2 (en
Inventor
Kan Fujimoto
Ichitami Nishimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kawasaki Heavy Industries Ltd
Kawasaki Motors Ltd
Original Assignee
Kawasaki Heavy Industries Ltd
Kawasaki Jukogyo KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kawasaki Heavy Industries Ltd, Kawasaki Jukogyo KK filed Critical Kawasaki Heavy Industries Ltd
Priority to JP2578281A priority Critical patent/JPS6048609B2/en
Publication of JPS57140519A publication Critical patent/JPS57140519A/en
Publication of JPS6048609B2 publication Critical patent/JPS6048609B2/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
    • F02B25/14—Engines characterised by using fresh charge for scavenging cylinders using reverse-flow scavenging, e.g. with both outlet and inlet ports arranged near bottom of piston stroke
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supercharger (AREA)

Abstract

PURPOSE:To improve the efficiency of fuel consumption by constricting a pair of scavenging air passages on both sides of a piston toward a scavenging port, thereby increasing the velocity at which the stream of scavenging air flows into the cylinder through the scavenging port. CONSTITUTION:A pair of scavenging air passages 13 provided on both sides of a piston 14 are constricted toward a scavenging port 15 so that the horizontal cross sectional area S1 of the scavenging air passage 13 facing the lower end 15a of the scavenging port 15 is less than 60% of the horizontal cross sectional area S2 of the scavenging air passage 13 facing the upper end 16a of the scavenging port 16 when the piston 14 is at BDC. This increases the velocity at which the scavenging air A flow into the cylinder 12 through the scavenging port 15. As a result the incoming scavenging air A flows, smoothly guided, along the inside 12a of the cylinder facing the exhaust port 17. Thus the scavenging air is prevented from flowing into the exhaust port 17 as indicated by arrow B, thus so much improving the fuel consumption efficiency.
JP2578281A 1981-02-23 1981-02-23 2 cycle engine Expired JPS6048609B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2578281A JPS6048609B2 (en) 1981-02-23 1981-02-23 2 cycle engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2578281A JPS6048609B2 (en) 1981-02-23 1981-02-23 2 cycle engine

Publications (2)

Publication Number Publication Date
JPS57140519A true JPS57140519A (en) 1982-08-31
JPS6048609B2 JPS6048609B2 (en) 1985-10-28

Family

ID=12175398

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2578281A Expired JPS6048609B2 (en) 1981-02-23 1981-02-23 2 cycle engine

Country Status (1)

Country Link
JP (1) JPS6048609B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004324643A (en) * 2003-04-29 2004-11-18 Andreas Stihl Ag & Co Kg Two-cycle engine
WO2016031718A1 (en) * 2014-08-29 2016-03-03 日立工機株式会社 Two-cycle engine and engine work machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004324643A (en) * 2003-04-29 2004-11-18 Andreas Stihl Ag & Co Kg Two-cycle engine
JP4500572B2 (en) * 2003-04-29 2010-07-14 アンドレアス シュティール アクチエンゲゼルシャフト ウント コンパニー コマンディートゲゼルシャフト 2-cycle engine
WO2016031718A1 (en) * 2014-08-29 2016-03-03 日立工機株式会社 Two-cycle engine and engine work machine
US10260453B2 (en) 2014-08-29 2019-04-16 Koki Holdings Co., Ltd. Two-cycle engine and engine work machine

Also Published As

Publication number Publication date
JPS6048609B2 (en) 1985-10-28

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