GB2001389A - Two-stroke engine with transfer port in piston crown - Google Patents

Two-stroke engine with transfer port in piston crown

Info

Publication number
GB2001389A
GB2001389A GB787830453A GB7830453A GB2001389A GB 2001389 A GB2001389 A GB 2001389A GB 787830453 A GB787830453 A GB 787830453A GB 7830453 A GB7830453 A GB 7830453A GB 2001389 A GB2001389 A GB 2001389A
Authority
GB
United Kingdom
Prior art keywords
piston crown
stroke engine
transfer port
port
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
GB787830453A
Other versions
GB2001389B (en
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.)
Piaggio and C SpA
Original Assignee
Piaggio and C SpA
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 Piaggio and C SpA filed Critical Piaggio and C SpA
Publication of GB2001389A publication Critical patent/GB2001389A/en
Application granted granted Critical
Publication of GB2001389B publication Critical patent/GB2001389B/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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L11/00—Valve arrangements in working piston or piston-rod
    • F01L11/02—Valve arrangements in working piston or piston-rod in piston
    • 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
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • F02B33/02—Engines with reciprocating-piston pumps; Engines with crankcase pumps
    • F02B33/04—Engines with reciprocating-piston pumps; Engines with crankcase pumps with simple crankcase pumps, i.e. with the rear face of a non-stepped working piston acting as sole pumping member in co-operation with the crankcase
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/24—Pistons  having means for guiding gases in cylinders, e.g. for guiding scavenging charge in two-stroke engines
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

Two passages 4 through the piston communicate with transfer passages 5 and lead to a port 3 formed in an insert in the piston crown. The combustible mixture issues as a jet, centrally in the cylinder, and displaces burnt gases outwardly and downwardly, to form a stratified charge. The port may be elliptical in cross-section, the major axis being in an axial plane through the cylinder about which a plurality of exhaust ports is symmetrically arranged. <IMAGE>
GB787830453A 1977-07-21 1978-07-20 Internal combustion piston engines Expired GB2001389B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT25992/77A IT1081147B (en) 1977-07-21 1977-07-21 TWO STROKE ENGINE WITH TRANSFER FROM THE PISTON

Publications (2)

Publication Number Publication Date
GB2001389A true GB2001389A (en) 1979-01-31
GB2001389B GB2001389B (en) 1982-03-03

Family

ID=11218354

Family Applications (1)

Application Number Title Priority Date Filing Date
GB787830453A Expired GB2001389B (en) 1977-07-21 1978-07-20 Internal combustion piston engines

Country Status (7)

Country Link
JP (1) JPS54116520A (en)
DE (1) DE2831426A1 (en)
ES (1) ES471889A1 (en)
FR (1) FR2398183A1 (en)
GB (1) GB2001389B (en)
IT (1) IT1081147B (en)
NL (1) NL7807743A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135423A (en) * 1983-02-12 1984-08-30 Alexander Walter Swales Piston and cylinder configuration
FR2728304A1 (en) * 1994-12-15 1996-06-21 Rougeron Andre Two=stroke IC engine with inlet passages in piston head
CZ306050B6 (en) * 2014-06-18 2016-07-13 Zdeněk Novotný Two-stroke internal combustion engine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01305124A (en) * 1988-05-31 1989-12-08 Ind Technol Res Inst Scavenge structure of two-cycle internal combustion engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135423A (en) * 1983-02-12 1984-08-30 Alexander Walter Swales Piston and cylinder configuration
FR2728304A1 (en) * 1994-12-15 1996-06-21 Rougeron Andre Two=stroke IC engine with inlet passages in piston head
CZ306050B6 (en) * 2014-06-18 2016-07-13 Zdeněk Novotný Two-stroke internal combustion engine

Also Published As

Publication number Publication date
DE2831426A1 (en) 1979-02-01
NL7807743A (en) 1979-01-23
ES471889A1 (en) 1979-02-16
JPS54116520A (en) 1979-09-10
GB2001389B (en) 1982-03-03
IT1081147B (en) 1985-05-16
FR2398183A1 (en) 1979-02-16
FR2398183B3 (en) 1981-03-06

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee