GB1529925A - Exhaust port of two-stroke engines - Google Patents

Exhaust port of two-stroke engines

Info

Publication number
GB1529925A
GB1529925A GB186976A GB186976A GB1529925A GB 1529925 A GB1529925 A GB 1529925A GB 186976 A GB186976 A GB 186976A GB 186976 A GB186976 A GB 186976A GB 1529925 A GB1529925 A GB 1529925A
Authority
GB
United Kingdom
Prior art keywords
exhaust port
base portion
stem
engine
degrees
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.)
Expired
Application number
GB186976A
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.)
Textron Inc
Original Assignee
Textron Inc
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 Textron Inc filed Critical Textron Inc
Priority to GB186976A priority Critical patent/GB1529925A/en
Publication of GB1529925A publication Critical patent/GB1529925A/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
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/18—Other cylinders
    • F02F1/22—Other cylinders characterised by having ports in cylinder wall for scavenging or charging
    • 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)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

1529925 Silencing 2-stroke I C engines TEXTRON INC 17 Jan 1976 01869/76 Heading F1B In order to reduce exhaust noise from a twostroke spark ignition I.C. engine, the exhaust port 7 is formed in the shape of an inverted "T" (considering the engine in a cylinder head uppermost position) with a wider base portion 8 and narrower stem portion 9. The slot base 8b is at BDC while the top 8a of the base portion 8 is at the same level as the top of a transfer port (not shown). The stem 9 extends upwards a distance equivalent to the piston movement obtained by 20 degrees-55 degrees crankshaft movement from the top 8a of the base portion 8. The stem 9 may have an upper 9a and lower 9b part, the lower part 9b is of uniform width, whilst the upper part 9a may be of greater or smaller width than the lower part 9b. The specification sets forth preferred dimensions for the exhaust port. Exhaust port 7 discharges through a short pentagonal conduit 10 into a silencer (not shown).
GB186976A 1976-01-17 1976-01-17 Exhaust port of two-stroke engines Expired GB1529925A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB186976A GB1529925A (en) 1976-01-17 1976-01-17 Exhaust port of two-stroke engines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB186976A GB1529925A (en) 1976-01-17 1976-01-17 Exhaust port of two-stroke engines

Publications (1)

Publication Number Publication Date
GB1529925A true GB1529925A (en) 1978-10-25

Family

ID=9729457

Family Applications (1)

Application Number Title Priority Date Filing Date
GB186976A Expired GB1529925A (en) 1976-01-17 1976-01-17 Exhaust port of two-stroke engines

Country Status (1)

Country Link
GB (1) GB1529925A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2597549A1 (en) * 1986-04-17 1987-10-23 Thaelmann Fahrzeug Jagdwaffen TWO-STROKE ENGINE EXHAUST MANIFOLD
FR2597924A1 (en) * 1986-04-28 1987-10-30 Thaelmann Fahrzeug Jagdwaffen EXHAUST PIPE COMPRISING A PROVISION AND A SPECIAL CONFORMATION FOR A TWO-STROKE ENGINE
EP0635624A1 (en) * 1993-07-19 1995-01-25 Textron Inc. Compression release for an internal combustion engine
FR2756592A1 (en) * 1996-12-03 1998-06-05 Inst Francais Du Petrole Instant exhaust for two stroke internal combustion engine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2597549A1 (en) * 1986-04-17 1987-10-23 Thaelmann Fahrzeug Jagdwaffen TWO-STROKE ENGINE EXHAUST MANIFOLD
FR2597924A1 (en) * 1986-04-28 1987-10-30 Thaelmann Fahrzeug Jagdwaffen EXHAUST PIPE COMPRISING A PROVISION AND A SPECIAL CONFORMATION FOR A TWO-STROKE ENGINE
EP0635624A1 (en) * 1993-07-19 1995-01-25 Textron Inc. Compression release for an internal combustion engine
FR2756592A1 (en) * 1996-12-03 1998-06-05 Inst Francais Du Petrole Instant exhaust for two stroke internal combustion engine

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Legal Events

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