FR2265981A1 - Four stroke engine with reduced compression stroke - has expansion ratio greater than compression ratio - Google Patents

Four stroke engine with reduced compression stroke - has expansion ratio greater than compression ratio

Info

Publication number
FR2265981A1
FR2265981A1 FR7413446A FR7413446A FR2265981A1 FR 2265981 A1 FR2265981 A1 FR 2265981A1 FR 7413446 A FR7413446 A FR 7413446A FR 7413446 A FR7413446 A FR 7413446A FR 2265981 A1 FR2265981 A1 FR 2265981A1
Authority
FR
France
Prior art keywords
stroke
compression
point
engine
inlet valve
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Withdrawn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
FR7413446A
Other languages
French (fr)
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.)
RUET BERNARD FR
Original Assignee
RUET BERNARD FR
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 RUET BERNARD FR filed Critical RUET BERNARD FR
Priority to FR7413446A priority Critical patent/FR2265981A1/en
Publication of FR2265981A1 publication Critical patent/FR2265981A1/en
Withdrawn legal-status Critical Current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
    • F02B41/00—Engines characterised by special means for improving conversion of heat or pressure energy into mechanical power
    • F02B41/02—Engines with prolonged expansion
    • 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
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

The engine is provided with a combustion chamber of smaller volume than a conventional four-stroke engine. The cam operating the inlet valve is then modified in one of two ways. In the first instance the inlet valve is held open for only about half the suction stroke (2) and then closes at the point (3). The piston continues the stroke (4) to the point (5) returning through the portion (6) to the point (3) where the compression stroke (7) begins. Expansion takes place through the whole stroke (9). Alternatively the inlet valve remains open until the piston returns to the point (3) and then compression begins but as in the first instance expansion takes place over the whole stroke.
FR7413446A 1974-03-25 1974-03-25 Four stroke engine with reduced compression stroke - has expansion ratio greater than compression ratio Withdrawn FR2265981A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7413446A FR2265981A1 (en) 1974-03-25 1974-03-25 Four stroke engine with reduced compression stroke - has expansion ratio greater than compression ratio

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7413446A FR2265981A1 (en) 1974-03-25 1974-03-25 Four stroke engine with reduced compression stroke - has expansion ratio greater than compression ratio

Publications (1)

Publication Number Publication Date
FR2265981A1 true FR2265981A1 (en) 1975-10-24

Family

ID=9137761

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7413446A Withdrawn FR2265981A1 (en) 1974-03-25 1974-03-25 Four stroke engine with reduced compression stroke - has expansion ratio greater than compression ratio

Country Status (1)

Country Link
FR (1) FR2265981A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983001484A1 (en) * 1981-10-13 1983-04-28 Investment Rarities Inc Method and apparatus for controlling the valve operation of an internal combustion engine
US4438737A (en) * 1981-10-13 1984-03-27 Investment Rarities, Incorporated Apparatus and method for controlling the valve operation of an internal combustion engine
WO2005116417A1 (en) * 2004-05-26 2005-12-08 Zengli Yang An internal combustion engine with super expansion

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983001484A1 (en) * 1981-10-13 1983-04-28 Investment Rarities Inc Method and apparatus for controlling the valve operation of an internal combustion engine
US4438737A (en) * 1981-10-13 1984-03-27 Investment Rarities, Incorporated Apparatus and method for controlling the valve operation of an internal combustion engine
WO2005116417A1 (en) * 2004-05-26 2005-12-08 Zengli Yang An internal combustion engine with super expansion
US7438025B2 (en) 2004-05-26 2008-10-21 Zengli Yang Ultra-expansion four-stroke internal combustion engine
CN1934342B (en) * 2004-05-26 2010-04-14 杨增利 Super-expansion four-stroke internal combustion engine

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Legal Events

Date Code Title Description
ST Notification of lapse