GB2001390A - Two-stroke engine with exhaust port in piston crown - Google Patents

Two-stroke engine with exhaust port in piston crown

Info

Publication number
GB2001390A
GB2001390A GB787830454A GB7830454A GB2001390A GB 2001390 A GB2001390 A GB 2001390A GB 787830454 A GB787830454 A GB 787830454A GB 7830454 A GB7830454 A GB 7830454A GB 2001390 A GB2001390 A GB 2001390A
Authority
GB
United Kingdom
Prior art keywords
piston crown
exhaust port
stroke engine
exhaust gases
piston
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.)
Withdrawn
Application number
GB787830454A
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 GB2001390A publication Critical patent/GB2001390A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F01L21/00—Use of working pistons or pistons-rods as fluid-distributing valves or as valve-supporting elements, e.g. in free-piston machines
    • F01L21/02—Piston or piston-rod used as valve members
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Exhaust Silencers (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Characterised By The Charging Evacuation (AREA)

Abstract

To improve scavenging and reduce air pollution, the exhaust gases are discharged through a port 3 formed in the piston crown so that the fresh mixture the density of which is greater than that of the exhaust gases and which is admitted through inclined transfer ports, is separated from the exhaust gases by the centrifugal force developed in the swirling charge. Exhaust part 3 is formed in a metal element 12 which is fixed to the piston heat. <IMAGE>
GB787830454A 1977-07-21 1978-07-20 Two-stroke engine with exhaust port in piston crown Withdrawn GB2001390A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT25991/77A IT1081146B (en) 1977-07-21 1977-07-21 TWO STROKE ENGINE WITH EXHAUST LIGHT IN THE PISTON

Publications (1)

Publication Number Publication Date
GB2001390A true GB2001390A (en) 1979-01-31

Family

ID=11218352

Family Applications (1)

Application Number Title Priority Date Filing Date
GB787830454A Withdrawn GB2001390A (en) 1977-07-21 1978-07-20 Two-stroke engine with exhaust port in piston crown

Country Status (7)

Country Link
JP (1) JPS54116519A (en)
DE (1) DE2831490A1 (en)
ES (1) ES471890A1 (en)
FR (1) FR2398182A1 (en)
GB (1) GB2001390A (en)
IT (1) IT1081146B (en)
NL (1) NL7807742A (en)

Cited By (1)

* 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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1126401B (en) * 1979-11-27 1986-05-21 Piaggio & C Spa CONSTRUCTION REFINEMENTS OF A TWO STROKE PISTON ENGINE OPPOSED OPERATED WITH STRATIFIED LOAD
DE3426976A1 (en) * 1984-07-21 1986-01-30 Graphischer Maschinenbau GmbH, 1000 Berlin DEVICE FOR CARRYING OUT A ROLE CHANGE
JPH0441223Y2 (en) * 1986-05-31 1992-09-28

Cited By (1)

* 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

Also Published As

Publication number Publication date
FR2398182B3 (en) 1981-03-06
FR2398182A1 (en) 1979-02-16
JPS54116519A (en) 1979-09-10
DE2831490A1 (en) 1979-02-01
ES471890A1 (en) 1979-02-16
IT1081146B (en) 1985-05-16
NL7807742A (en) 1979-01-23

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)