EP1504180A1 - Combustion engine design - Google Patents
Combustion engine designInfo
- Publication number
- EP1504180A1 EP1504180A1 EP02722309A EP02722309A EP1504180A1 EP 1504180 A1 EP1504180 A1 EP 1504180A1 EP 02722309 A EP02722309 A EP 02722309A EP 02722309 A EP02722309 A EP 02722309A EP 1504180 A1 EP1504180 A1 EP 1504180A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- crankshafts
- piston
- engine
- combustion engine
- engine design
- 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
Links
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.
Landscapes
- Output Control And Ontrol Of Special Type Engine (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/FI2002/000380 WO2003093667A1 (en) | 2000-11-15 | 2002-05-06 | Combustion engine design |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1504180A1 true EP1504180A1 (en) | 2005-02-09 |
EP1504180B1 EP1504180B1 (en) | 2008-01-30 |
Family
ID=33547875
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02722309A Expired - Lifetime EP1504180B1 (en) | 2002-05-06 | 2002-05-06 | Combustion engine design |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1504180B1 (en) |
AT (1) | ATE385285T1 (en) |
AU (1) | AU2002253199A1 (en) |
DE (1) | DE60224890T2 (en) |
-
2002
- 2002-05-06 EP EP02722309A patent/EP1504180B1/en not_active Expired - Lifetime
- 2002-05-06 AU AU2002253199A patent/AU2002253199A1/en not_active Abandoned
- 2002-05-06 AT AT02722309T patent/ATE385285T1/en not_active IP Right Cessation
- 2002-05-06 DE DE60224890T patent/DE60224890T2/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO03093667A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE60224890T2 (en) | 2009-01-22 |
DE60224890D1 (en) | 2008-03-20 |
AU2002253199A1 (en) | 2003-11-17 |
ATE385285T1 (en) | 2008-02-15 |
EP1504180B1 (en) | 2008-01-30 |
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