IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0488337
(2002-08-13)
|
우선권정보 |
IT-0000174 (2001-08-28) |
국제출원번호 |
PCT//EP02/09074
(2004-02-27)
|
§371/§102 date |
20040227
(20040227)
|
국제공개번호 |
WO03//021082
(2003-03-13)
|
발명자
/ 주소 |
|
출원인 / 주소 |
- Fantuzzi Reggiane Corporation Holding S.A.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
11 인용 특허 :
7 |
초록
▼
The reciprocating internal-combustion engine comprises at least one hollow cylinder, with a chamber inside a working fluid, the chamber has an end closed by a head and an opposite end closed by a piston that reciprocates by rectilinear motion in the chamber between a bottom dead center and a top dea
The reciprocating internal-combustion engine comprises at least one hollow cylinder, with a chamber inside a working fluid, the chamber has an end closed by a head and an opposite end closed by a piston that reciprocates by rectilinear motion in the chamber between a bottom dead center and a top dead center, and a device for converting the reciprocating rectilinear motion into a rotary motion of a driving shaft. The conversion device comprises at least one push rod substantially perpendicular to the shaft with a first end associated with the piston and a second end provided with pusher elements, and at least one contoured eccentric element keyed on the shaft on which a circuit element is provided which is crossed by the pusher elements and adjustment elements for adjusting sliding of the pusher elements along the circuit element so as to keep the rod and the piston in a substantially stationary configuration for a presettable rotation angle of the driving shaft.
대표청구항
▼
1. A reciprocating internal-combustion engine, of the type comprising at least one hollow cylinder, inside which there is a chamber for the working fluid, said chamber having an end that is closed by a head and an opposite end that is closed by a piston that is adapted to slide with a reciprocating
1. A reciprocating internal-combustion engine, of the type comprising at least one hollow cylinder, inside which there is a chamber for the working fluid, said chamber having an end that is closed by a head and an opposite end that is closed by a piston that is adapted to slide with a reciprocating rectilinear motion in said chamber between a bottom dead center, which determines the maximum distance from said head, and a top dead center, which determines the minimum distance from said head, and a device for converting said reciprocating rectilinear motion into a rotary motion of a driving shaft that comprises at least one push rod, which is substantially perpendicular to said shaft and has a first end associated with the piston and a second end provided with pusher elements, and at least one contoured eccentric element that is keyed on said shaft and on which there is a circuit element that is adapted to be followed by said pusher elements that are mechanically connected thereto, the action of the fluid in the chamber imparting to the piston a thrust for actuating the rod with a reciprocating rectilinear motion, with the sliding of the pusher elements along the circuit element so as to transfer said thrust to the eccentric element for the rotary actuation of the driving shaft, characterized in that it comprises adjustment means for adjusting said sliding of the pusher elements along the circuit element which are provided so that when the piston is at least proximate to one of said dead centers, keep the rod and the piston in a substantially stationary configuration for a presettable rotation angle of the driving shaft, said circuit element comprising at least two lobes which are mutually blended and offset at 180° with a different average radius of curvature with respect to the center of said eccentric element, the circuit element being asymmetric with respect to a central axis.2. The engine of claim 1, wherein said adjustment means are provided so as to keep the rod and the piston in said stationary configuration when the piston is proximate to the top dead center that corresponds to the combustion stroke, during with the volume of the chamber remains substantially constant.3. The engine of claim 1, wherein said adjustment means are provided so as to keep the rod and the piston in said stationary configuration when the piston is proximate to the top dead center that corresponds to the induction stroke, during which the volume of the chamber remains substantially constant.4. The engine of claim 1, wherein said adjustment means are provided so as to keep the rod and the piston in said stationary configuration when the piston is proximate to the bottom dead center that corresponds to the exhaust stroke, during which the volume of the chamber remains substantially constant.5. The engine of claim 1, wherein the profile of said circuit element is constituted by two lobes that are mutually blended and offset at 180° with respect to each other, with two portions for each one of said lobes, the action of the working fluid in the chamber occurring during 360° of revolution of the driving shaft.6. The engine of claim 1, wherein the profile of said circuit element is constituted by three lobes, which are mutually blended and offset at 120° to each other with two portions for each one of said lobes, the action of the working fluid in the chamber occurring in 240° of revolution of the driving shaft.7. The engine of claim 1, wherein the profile of said circuit element is constituted by four lobes which are mutually blended and offset at 90° with respect to each other with two portions for each one side lobes, the action of the working fluid in the chamber occurring in 180° of revolution of the driving shaft.8. The engine of claim 1, wherein said adjustment means comprise a blending region for blending the two portions of at least one of said lobes that is substantially shaped like a circular arc.9. The engine of claim 1, wherein said adjustment means comprise a blending region for blending at least two contiguous portions of at least two consecutive lobes that is substantially shaped like a circular arc.10. The engine of claim 9, wherein said circular arc has a breadth comprised between 5 and 60 sexagesimal degrees.11. The engine of claim 1, wherein said eccentric element comprises a disk-like body that is keyed on said driving shaft and on one face of which there is, in relief, said circuit element, and said pusher elements are constituted by at least one first pin and one second pin that are provided so as to surround said circuit element and to slide along the respective outer and inner profiles.12. The engine of claim 1, wherein said driving shaft is rectilinear.13. The engine of claim 1, comprising two said cylinders, which are mutually diametrically opposite with respect to the driving shaft, with pistons thereof being associated with the first end of a respective said push rod, whose second end is provided with respective ones of said pusher elements that are mechanically rigidly coupled to a shaped said eccentric element, which is keyed on said driving shaft and on which there is a circuit element of the type with two lobes that are offset at 180°.14. A reciprocating internal-combustion engine comprising:at least one hollow cylinder having a chamber for a working fluid;a piston slidably arranged in a reciprocating rectilinear manner in said chamber;a push rod connected to said piston and extending outside said chamber;a rotating driving shaft;a rotating circuit element connected to said driving shaft;a follower slidably arranged on said circuit element and connected to said push rod such that rectilinear motion of said piston causes said circuit element and said driving shaft to rotate;said circuit element comprising an asymmetric ring extending 360° and having a first arched lobe connected to a second arched lobe mutually interconnected and each of which extend 180°, said first arched lobe having a first average radius of curvature and said second arched lobe having a second average radius of curvature different from said first average radius of curvature.15. The reciprocating internal-combustion engine of claim 14, said asymmetric ring comprising inner and outer tracks, and said follower comprising a pair of followers sliding respectively on said inner and outer tracks.
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