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 ratioInfo
- 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- Withdrawn
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.
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)
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 |
-
1974
- 1974-03-25 FR FR7413446A patent/FR2265981A1/en not_active Withdrawn
Cited By (5)
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 |