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EP1861600A1 - Système de puissance pour produire de l électricite à partir d un moteur à combustion interne au moyen d un générateur linéaire - Google Patents

Système de puissance pour produire de l électricite à partir d un moteur à combustion interne au moyen d un générateur linéaire

Info

Publication number
EP1861600A1
EP1861600A1 EP06728493A EP06728493A EP1861600A1 EP 1861600 A1 EP1861600 A1 EP 1861600A1 EP 06728493 A EP06728493 A EP 06728493A EP 06728493 A EP06728493 A EP 06728493A EP 1861600 A1 EP1861600 A1 EP 1861600A1
Authority
EP
European Patent Office
Prior art keywords
power system
rod
pistons
engine
linear
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Withdrawn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
EP06728493A
Other languages
German (de)
English (en)
Inventor
Attilio Caleffi
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1861600A1 publication Critical patent/EP1861600A1/fr
Withdrawn legal-status Critical Current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
    • F02B71/00—Free-piston engines; Engines without rotary main shaft
    • F02B71/04—Adaptations of such engines for special use; Combinations of such engines with apparatus driven thereby
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
    • H02K7/1869—Linear generators; sectional generators
    • H02K7/1876—Linear generators; sectional generators with reciprocating, linearly oscillating or vibrating parts
    • H02K7/1884—Linear generators; sectional generators with reciprocating, linearly oscillating or vibrating parts structurally associated with free piston engines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Definitions

  • the invention relates to a power system for converting the mechanical output of an internal combustion (i.e.) engine into electric energy. More in detail, the invention relates to a power system wherein an i.e. engine is coupled to a linear generator for producing electric energy.
  • One particular aspect of the invention is an electric-traction car or vehicle, powered by one or more electric motors and wherein the energy for the electric motors is directly produced on the vehicle itself by means of an internal combustion engine coupled to a linear generator.
  • a linear generator is a device adapted to convert an alternate linear movement into electric energy, substantially comprising a linear stator formed by one or more windings, and a moving magnet. Electrical energy is produced by alternate movement of said magnet through the windings of the stator.
  • a linear generator as a matter of principle, can be coupled to a thermal engine or even to a pump.
  • a promising field for the use of a linear generator together with a thermal engine has appeared to be the powering of hybrid vehicles, wherein a thermal engine is used to operate an electric generator, and energy produced by said generator is sent to one or more electric motors.
  • An aim of the invention is to solve the above problems providing an efficient arrangement for coupling a thermal engine with a linear electric generator.
  • a further aim is to realize a unit of the above type with a reduced length compared to power output.
  • a power system for producing electricity from an internal combustion engine comprising: - an internal combustion engine with at least one pair of opposed cylinders, said opposed cylinders being aligned on one axis and having pistons connected by a rigid bar parallel to said axis;
  • said movable means are obtained with a rod and said stating means are obtained with suitable screens. Said screens are provided on both sides of the rod and have slots facing the end portions of the rod itself; each end portion of the rod has a reduced section adapted to pass through the slot and forming a shoulder larger than the slot, thus acting as a stop means.
  • said rod can also be used to control the valves and fuel injectors, through mechanical or electronic means.
  • a plurality of linear electric generators are disposed in a "star" arrangement around the axis of the engine, i.e. the generators are radially arranged around the rigid bar connecting the pistons, thus achieving a high output with a small overall length.
  • an electric vehicle is provided with the above described power system; the vehicle further comprises means for converting the output of the linear generator into a DC current, a battery and one or more electric motors.
  • Advantageous effects of the invention are: arrangement suitable for use a linear electric generator with known thermal engines, simplified construction of the engine, high power output with reduced length.
  • Fig. 1 is a scheme of a part of a power system according to the invention
  • Fig. 2 is a schematic section of the power system of Fig. 1 ;
  • Fig. 3 is a scheme of one of the linear generators of the power system of Fig. 1 ;
  • Fig. 4 is a cross section of the linear generators according to a preferred form, and
  • Fig. 5 shows further details of Fig.1 regarding the stop means for the pistons.
  • a power system according to the invention comprising a thermal i.e. engine with four cylinders 1, 2, 3 and 4.
  • the cylinders as shown, are disposed in a flat arrangement, with cylinder 1 and 2 forming a first pair of opposite cylinders aligned on a first axis, and cylinders and 4 forming a second pair of opposite cylinders aligned on a second axis parallel to the first.
  • Pistons of the thermal engine are shown as A, B, C and D.
  • Pistons A and B are connected by a rigid linear element or bar 5 parallel to the axis of cylinders 1 and 2, while pistons C and D are connected by another rigid linear element or bar 6, parallel to the axis of cylinders 3 and 4.
  • Bars 5 and 6 are firmly connected to a rod 7 parallel to said bars.
  • Rod 7 cooperates with suitable static means to act as a stop means for the pistons and allows control of valves fuel injectors and other components. This will be described in greater detail hereinbelow.
  • the power system comprises at least one linear electric generator.
  • a preferred arrangement is seen in Fig. 2, wherein a number of electric generators E1 , E2, ...En are radially arranged around the axis of cylinders 1 , 2 and around the axis of cylinders 3, 4.
  • Fig. 2 makes clear the modular construction of the power system, which can be seen as comprising a first module M1 and a second module M2, each module being formed by two opposed cylinders of the thermal engine and electric generators around the axis of the two opposed cylinders.
  • This particular arrangement provides a high output compared to the length of the whole unit, because a plurality of shorter electric generator are used, instead of one longer generator.
  • Rigid connecting means are provided to connect the moving magnet of each electric generator to the respective bar.
  • each linear electric generator substantially comprises a linear stator 10 and a moving magnet 11.
  • Linear stator 10 comprises a plurality of coils or windings 12 and insulating portions 13; the moving magnet 11 is formed by permanent magnets 14 spaced by dielectric elements 15. The moving magnet 11 is firmly connected to the bar 5 by crosspieces 16.
  • stator 10 is substantially a cylindrical armature, and the magnet 11 is a coaxial, cylindrical element (Fig. 4).
  • a net 12 is provided surrounding the linear electric generators to shield the electromagnetic fields.
  • said static means are in the form of screens 20 and 21 which are provided on both sides of the engine. Screens 20 and 21 have slots 22 and 23 aligned with the rod 7.
  • the rod 7 has and end portion 24 facing the screen 20, said end portion 24 having a reduced section adapted to pass through the slot 22, and forming a shoulder 25.
  • Said shoulder 25 is larger than slot 22, so that is constitutes a stop means for the stroke of the pistons A-D connected to the rod 7.
  • the opposite end portion of the bar 7, facing the screen 21 is substantially identical.
  • end portions of the rod 7 can act as stop means against the screens 20 and 21, limiting the stroke of the pistons.
  • End portions of the rod 7 can also be used as a means for detecting the position of the pistons and control the valves, injectors, etc... of a 4-stroke motor.
  • detecting means may be provided to detect the end portions of rod 7 reaching the slots 22, 23; the signal is sent to an electronic board which controls the fuel injectors, valves and so on.
  • the valves may be opened or closed by electronically- controlled actuating means (e.g. pneumatic).
  • mechanical actuating means may be provided, so that the end portions of the rod 7, reaching the position near the end of stroke, can directly actuate the valves of the motor.
  • the number of cylinders of the thermal engines is equal to the number of strokes or a multiple of it;
  • the thermal energy, according to the invention may be Otto or Diesel cycle and use any fuel including natural gas or hydrogen.
  • the above power system can be used for producing electric energy or for powering a vehicle.
  • the electric energy is sent to a battery feeding one or more electric motors, preferably one motor for each driving wheel.
  • the linear generator can also be used to start the thermal engine.
  • means can be provided to recover as much energy as possible, e.g. by charging the battery using the electric motors as generators when the vehicle is braking.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

Système de puissance pour convertir une énergie thermique en une énergie électrique, comprenant un moteur thermique avec au moins une paire de cylindres opposés avec des pistons raccordés par une barre rigide (5), et au moins un générateur électrique linéaire comprenant un aimant mobile (11) raccordé à ladite barre (5) ; ladite barre (5) étant également raccordée à des moyens mobiles (7) qui coopèrent avec des moyens statiques (20, 21) pour agir en tant que moyens d’arrêt pour les pistons. Dans un mode de réalisation préféré, une pluralité de générateurs électriques linéaires est agencée radialement autour des cylindres. Un véhicule électrique alimenté par un tel système est également décrit.
EP06728493A 2005-03-16 2006-03-15 Système de puissance pour produire de l électricite à partir d un moteur à combustion interne au moyen d un générateur linéaire Withdrawn EP1861600A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000017A ITMN20050017A1 (it) 2005-03-16 2005-03-16 Produzione energia elettrica da motori a scoppio tramite dinamo lineari
PCT/IT2006/000161 WO2006097968A1 (fr) 2005-03-16 2006-03-15 Système de puissance pour produire de l’électricite à partir d’un moteur à combustion interne au moyen d’un générateur linéaire

Publications (1)

Publication Number Publication Date
EP1861600A1 true EP1861600A1 (fr) 2007-12-05

Family

ID=36463508

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06728493A Withdrawn EP1861600A1 (fr) 2005-03-16 2006-03-15 Système de puissance pour produire de l électricite à partir d un moteur à combustion interne au moyen d un générateur linéaire

Country Status (3)

Country Link
EP (1) EP1861600A1 (fr)
IT (1) ITMN20050017A1 (fr)
WO (1) WO2006097968A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102042083B (zh) * 2010-12-09 2012-09-26 潍坊威度电子科技有限公司 准自由活塞内燃机
CN103573407A (zh) * 2013-10-28 2014-02-12 北京理工大学 一种自平衡自由活塞内燃发电机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2473625A1 (fr) * 1980-01-11 1981-07-17 Vironneau Pierre Moteur rectilineaire a quatre temps et groupes-moteurs comportant un tel moteur rectilineaire
IT1145573B (it) * 1981-10-30 1986-11-05 Egidio Allais Motore a stantuffi liberi con camma autonoma soecialmente per l azionamento di alternatori lineari
GB9919519D0 (en) * 1999-08-19 1999-10-20 Dawson Richard F Power generator
DE10028738A1 (de) * 2000-06-09 2002-08-29 Schneider Erich Freikolbenmotor mit einem Feder-Masse-System

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006097968A1 *

Also Published As

Publication number Publication date
ITMN20050017A1 (it) 2006-09-17
WO2006097968A1 (fr) 2006-09-21

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