WO2003093667A1 - Combustion engine design - Google Patents
Combustion engine design Download PDFInfo
- Publication number
- WO2003093667A1 WO2003093667A1 PCT/FI2002/000380 FI0200380W WO03093667A1 WO 2003093667 A1 WO2003093667 A1 WO 2003093667A1 FI 0200380 W FI0200380 W FI 0200380W WO 03093667 A1 WO03093667 A1 WO 03093667A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- crankshafts
- piston
- engine
- combustion engine
- engine design
- Prior art date
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
- F02B75/00—Other engines
- F02B75/04—Engines with variable distances between pistons at top dead-centre positions and cylinder heads
- F02B75/047—Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of variable crankshaft position
-
- 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
- F02B75/32—Engines characterised by connections between pistons and main shafts and not specific to preceding main groups
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D15/00—Varying compression ratio
- F02D15/02—Varying compression ratio by alteration or displacement of piston stroke
Definitions
- the present invention relates to combustion engines.
- the present invention is more specifically directed to the combustion engine design of the preamble of claim 1.
- a design based on a piston and a crankshaft is usually used in combustion en- gine designs for converting the energy obtained from a fuel into mechanical energy.
- the idea is to make use of the pressure generated by the volumetric expansion of a burning fuel as a piston movement in a cylinder.
- the piston movement is transmitted by means of a connecting rod to the crankshaft, where the movement is converted into a rotating motion.
- the piston is connected to one or two connecting rods by means of a piston pin.
- the connecting rod is further connected by means of a crankshaft bearing to a crankshaft.
- the piston can be connected by means of a fixed rod to a bearing of a connecting rod, which bearing moves in a sleeve.
- the main problem with the known arrangements has to do with supporting the piston with respect to lateral tilting.
- the connecting rod is connected to the piston by means of a bearing it does not provide any tilting-preventing support for the piston in a direction perpendicular to the axis of the piston pin.
- An object of this invention is to provide an improved engine design that makes it possible to change the compression ratio and piston displacement and with which the disadvantages of the above-mentioned known combustion engine arrange- ments can be avoided or at least substantially minimized and which thus improves the operability and long-term use of the engine.
- the tilting of the piston and the resulting wear are prevented.
- the piston is connected to the connecting rods by means of an intermediate part and two support points, both of which have a separate connecting rod for two separate crankshafts, the piston support is stable.
- This design makes it possible to use a simpler piston design and lighter structures in the connecting rods and in the crankshaft. Also, the contrary motions of the connecting rods and the effect of the two crankshafts can be made to function so that the inertial forces diminish and the engine runs more smoothly.
- the invention renders the structure of the engine durable and makes it possible to avoid vibration and the resulting disadvantages caused by the inertial forces.
- the use of two connecting rods and crankshafts makes it possi- ble to change the stroke volume and compression ratio of the engine during the operation of the machine. This procedure and design enables optimal adjustment of the operation of the engine in a wide range of loading.
- Figure 1 is a cross-sectional view of the engine design according to the invention seen from the end of the crankshafts.
- the combustion engine design according to the invention comprises an engine frame 1 connected to a cylinder part 2.
- the crankshaft bearing arrangement is provided by means of movable bearing units 17.
- the bearing units are attached to the engine frame so as to be slidable.
- a moving mechanism 12 is connected to the bearing units 17, which moving mechanism moves the crankshaft bearings 17 at the same time towards each other or further away from each other.
- the distance between the crankshafts is controlled by means of a drive unit 12 included in the moving mechanism.
- Connecting rods 6 and 7 are connected by means of a crankshaft bearing to crankshafts 4 and 5.
- the connecting rods 6 and 7 are connected, at each cylinder, to the same piston 3.
- Piston pins 9 and 10 are, in this embodiment, disposed directly in the piston, or a separate intermediate part 8 rigidly fixed to the piston is used.
- the intermediate part 8 is connected to the piston with a pin 18, which is angular and prevents the attachment part from moving relative to the piston.
- the two crankshafts 4 and 5 included in the structure of the engine are connected to each other by means of gearing, which synchronizes the rotating motion of the crankshafts 4 and 5 relative to each other.
- the structure of the gearing 14, 15 is accomplished so that the movement of the shafts relative to each other moves, at the same time, a gear wheel 15 of the gearing.
- the gear wheel 15 is arranged to slide axially along an intermediate shaft 16 and arranged to move together with a main bearing 17 of the crankshaft.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20002494A FI111409B (en) | 2000-11-15 | 2000-11-15 | Internal Combustion structure |
PCT/FI2002/000380 WO2003093667A1 (en) | 2000-11-15 | 2002-05-06 | Combustion engine design |
DE60224890T DE60224890T2 (en) | 2002-05-06 | 2002-05-06 | COMBUSTION ENGINE DESIGN |
EP02722309A EP1504180B1 (en) | 2002-05-06 | 2002-05-06 | Combustion engine design |
AU2002253199A AU2002253199A1 (en) | 2002-05-06 | 2002-05-06 | Combustion engine design |
AT02722309T ATE385285T1 (en) | 2002-05-06 | 2002-05-06 | COMBUSTION ENGINE DESIGN |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20002494A FI111409B (en) | 2000-11-15 | 2000-11-15 | Internal Combustion structure |
PCT/FI2002/000380 WO2003093667A1 (en) | 2000-11-15 | 2002-05-06 | Combustion engine design |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003093667A1 true WO2003093667A1 (en) | 2003-11-13 |
Family
ID=32395501
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI2002/000380 WO2003093667A1 (en) | 2000-11-15 | 2002-05-06 | Combustion engine design |
Country Status (2)
Country | Link |
---|---|
FI (1) | FI111409B (en) |
WO (1) | WO2003093667A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2663314C1 (en) * | 2017-03-21 | 2018-08-03 | Игорь Иванович Линич | Internal combustion engine |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1388925A (en) * | 1963-12-31 | 1965-02-12 | S N Marep | Method and device for transforming a continuous circular motion into an alternating rectilinear motion of adjustable amplitude |
FR2489430A1 (en) * | 1980-09-02 | 1982-03-05 | Gouvenaux Andre | Piston stroke variation crankshaft - has two connecting rods and crankshafts with output gears and spacing adjusted by threaded crank support rod |
US5680840A (en) * | 1996-11-08 | 1997-10-28 | Mandella; Michael J. | Multi-crankshaft variable stroke engine |
-
2000
- 2000-11-15 FI FI20002494A patent/FI111409B/en not_active IP Right Cessation
-
2002
- 2002-05-06 WO PCT/FI2002/000380 patent/WO2003093667A1/en active IP Right Grant
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1388925A (en) * | 1963-12-31 | 1965-02-12 | S N Marep | Method and device for transforming a continuous circular motion into an alternating rectilinear motion of adjustable amplitude |
FR2489430A1 (en) * | 1980-09-02 | 1982-03-05 | Gouvenaux Andre | Piston stroke variation crankshaft - has two connecting rods and crankshafts with output gears and spacing adjusted by threaded crank support rod |
US5680840A (en) * | 1996-11-08 | 1997-10-28 | Mandella; Michael J. | Multi-crankshaft variable stroke engine |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2663314C1 (en) * | 2017-03-21 | 2018-08-03 | Игорь Иванович Линич | Internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
FI20002494A (en) | 2002-05-16 |
FI20002494A0 (en) | 2000-11-15 |
FI111409B (en) | 2003-07-15 |
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