FR2345587A1 - Pollution reduction system for two stroke engine - has additional inlet port to admit fresh air to cylinder to form layer above piston - Google Patents

Pollution reduction system for two stroke engine - has additional inlet port to admit fresh air to cylinder to form layer above piston

Info

Publication number
FR2345587A1
FR2345587A1 FR7608937A FR7608937A FR2345587A1 FR 2345587 A1 FR2345587 A1 FR 2345587A1 FR 7608937 A FR7608937 A FR 7608937A FR 7608937 A FR7608937 A FR 7608937A FR 2345587 A1 FR2345587 A1 FR 2345587A1
Authority
FR
France
Prior art keywords
cylinder
air
piston
stroke engine
inlet port
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
FR7608937A
Other languages
French (fr)
Other versions
FR2345587B1 (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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7608937A priority Critical patent/FR2345587A1/en
Publication of FR2345587A1 publication Critical patent/FR2345587A1/en
Application granted granted Critical
Publication of FR2345587B1 publication Critical patent/FR2345587B1/fr
Granted 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
    • F02B25/20—Means for reducing the mixing of charge and combustion residues or for preventing escape of fresh charge through outlet ports not provided for in, or of interest apart from, subgroups F02B25/02 - F02B25/18
    • F02B25/22—Means for reducing the mixing of charge and combustion residues or for preventing escape of fresh charge through outlet ports not provided for in, or of interest apart from, subgroups F02B25/02 - F02B25/18 by forming air cushion between charge and combustion residues
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • 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

Abstract

The two stroke engine has a combustion chamber (1) formed in the cylinder head (2) attached to the cylinder block (3). Air Air which has been drawn into the crankcase through the port (14) is forced into the passage-way (12) by the downward motion of the piston (4). When the piston (4) is at bottom dead centre the air flows into the cylinder through the port (11) whilst the exhaust gases are expelled through the port (9). As the piston moves upwards the ports are closed but a layer of pure air remains above the piston. Air and fuel mixture from the carburettor flows into the duct (15) and through the open poppet valve (5). The discharge to the atmosphere of unburnt fuel is thus avoided.
FR7608937A 1976-03-26 1976-03-26 Pollution reduction system for two stroke engine - has additional inlet port to admit fresh air to cylinder to form layer above piston Granted FR2345587A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7608937A FR2345587A1 (en) 1976-03-26 1976-03-26 Pollution reduction system for two stroke engine - has additional inlet port to admit fresh air to cylinder to form layer above piston

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7608937A FR2345587A1 (en) 1976-03-26 1976-03-26 Pollution reduction system for two stroke engine - has additional inlet port to admit fresh air to cylinder to form layer above piston

Publications (2)

Publication Number Publication Date
FR2345587A1 true FR2345587A1 (en) 1977-10-21
FR2345587B1 FR2345587B1 (en) 1979-10-05

Family

ID=9171038

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7608937A Granted FR2345587A1 (en) 1976-03-26 1976-03-26 Pollution reduction system for two stroke engine - has additional inlet port to admit fresh air to cylinder to form layer above piston

Country Status (1)

Country Link
FR (1) FR2345587A1 (en)

Also Published As

Publication number Publication date
FR2345587B1 (en) 1979-10-05

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Legal Events

Date Code Title Description
ST Notification of lapse