WO2021191647A1 - Electromechanical shock absorber for energy recovery - Google Patents

Electromechanical shock absorber for energy recovery Download PDF

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Publication number
WO2021191647A1
WO2021191647A1 PCT/IB2020/000110 IB2020000110W WO2021191647A1 WO 2021191647 A1 WO2021191647 A1 WO 2021191647A1 IB 2020000110 W IB2020000110 W IB 2020000110W WO 2021191647 A1 WO2021191647 A1 WO 2021191647A1
Authority
WO
WIPO (PCT)
Prior art keywords
shock absorber
electromechanical shock
coil
energy recovery
movement
Prior art date
Application number
PCT/IB2020/000110
Other languages
French (fr)
Inventor
Markus Fleckenstein
Original Assignee
Markus Fleckenstein
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 Markus Fleckenstein filed Critical Markus Fleckenstein
Priority to PCT/IB2020/000110 priority Critical patent/WO2021191647A1/en
Publication of WO2021191647A1 publication Critical patent/WO2021191647A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
    • F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
    • F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G13/00—Resilient suspensions characterised by arrangement, location or type of vibration dampers
    • B60G13/14—Resilient suspensions characterised by arrangement, location or type of vibration dampers having dampers accumulating utilisable energy, e.g. compressing air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
    • F03G7/08—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for recovering energy derived from swinging, rolling, pitching or like movements, e.g. from the vibrations of a machine
    • F03G7/081—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for recovering energy derived from swinging, rolling, pitching or like movements, e.g. from the vibrations of a machine recovering energy from moving road or rail vehicles, e.g. collecting vehicle vibrations in the vehicle tyres or shock absorbers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/03—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using magnetic or electromagnetic means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10—Type of spring
    • B60G2202/16—Magnetic spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/20—Type of damper
    • B60G2202/21—Type of damper with two dampers per wheel, arranged before and after the wheel axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/422—Links for mounting suspension elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2600/00—Indexing codes relating to particular elements, systems or processes used on suspension systems or suspension control systems
    • B60G2600/22—Magnetic elements
    • B60G2600/24—Magnetic elements permanent magnets

Definitions

  • the task of the present invention is therefore also to use the possible energy yield from the electromagnetic damping of vehicle suspensions, to increase it significantly and thereby to optimize the damping characteristic, or to make it adjustable.
  • the task is solved by translating the transmission of the vertical wheel movement into the spring system to a longer path by means of leverage and by increasing the induction of a moving permanent magnetic field into the coil by concentrating it in a magnetic gap.
  • the change in the damping characteristics can then also be achieved by electronic circuits for resistance adjustment, e. g. with the wiring of taps of the induction coil.
  • Electromagnetic suspensions have been tried several times, known e. g. 2011 in a development of the TU Eindhoven (NL).
  • the problem with the generation of electrical energy from the movement of the shock absorbers or suspension struts is that the movement comes with a small stroke (mainly less than 10 mm) but high acceleration and therefore difficult to implement.
  • the two variants can also be combined with each other.
  • Fig. 1 shows the current state of the art schematically using a conventional motor vehicle suspension strut (1) with a coil spring (2), plunger (3) and hydraulic damper (4), which dampens the vertical movement of the wheel (5) by the resistance when the hydraulic oil (6) is pressed through the gaps or valves (7) into the secondary volume (8) of the damper.
  • Fig. 2 shows the design of an electromagnetic damper (6) which transforms the vertical movement of the wheel (5) via a lever transmission (9-12) to a long stroke of a moving magnet core (13) in an induction coil (14).
  • Fig 3 shows the solution with hydraulic transformation: The primary cylinder (14) of the shock absorber moves the hydraulic oil (6) through the branch (15) into the slimmer secondary cylinder (16), which via the piston rod (17) moves the induction coil (18) in the air gap of a stationary permanent magnet (19)
  • Fig. 4 shows the same hydraulic transformation, but here with a moving magnet rod (20) which is moved as a core in a stationary electric coil (21)

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

The vertical movement of a wheel suspension is transformed into a longer path by lever action or hydraulically. With it a core of high-energy magnetic material is moved in an induction coil, or a plunger coil in a magnetic gap. The alternating currents induced in the respective coil are rectified and used for additional charging of the vehicle battery. By changing the internal resistance of the system, different damping characteristics can be achieved.

Description

Electromechanical shock absorber for energy recovery
BACKGRUOUND OF THE INVENTION
Modern electric vehicles are still limited in their range despite numerous improvements in batteries and drive systems.
Larger batteries solve the problem with increasingly high effort, because they increase the vehicle weight, which again requires more battery capacity.
Therefore, smaller contributions, such as recuperation of braking energy or vehicle roofs with solar cells, are increasingly used to improve the range.
TASK OF THE INVENTION
The task of the present invention is therefore also to use the possible energy yield from the electromagnetic damping of vehicle suspensions, to increase it significantly and thereby to optimize the damping characteristic, or to make it adjustable.
SOLUTION
According to the invention, the task is solved by translating the transmission of the vertical wheel movement into the spring system to a longer path by means of leverage and by increasing the induction of a moving permanent magnetic field into the coil by concentrating it in a magnetic gap.
The change in the damping characteristics can then also be achieved by electronic circuits for resistance adjustment, e. g. with the wiring of taps of the induction coil.
PRIOR ART
Electromagnetic suspensions have been tried several times, known e. g. 2011 in a development of the TU Eindhoven (NL).
In their report [1] the possible use for energy recovery was mentioned, but the possible extent estimated as too small. In addition, with
EN 102007 05477 A1 -A3 EN 102011 099 EN 10 2011 08 8008 A!
CH 690396A5
DE102007 05477A1 - A2, and EN 11 201 20004573 T5 similar devices are known, but, like the study mentioned above, they are primarily related to an active suspension system
SYSTEM DESCRIPTION
The problem with the generation of electrical energy from the movement of the shock absorbers or suspension struts is that the movement comes with a small stroke (mainly less than 10 mm) but high acceleration and therefore difficult to implement.
This can be achieved either by applying a longer path to an induction magnet via a lever, or by moving an induction coil in the narrow air gap of a permanent magnet system.
It is conceivable, and preferred here, to transform the movement hydraulically to a longer path, whereby the design of a conventional shock absorber would be retained, but its hy draulic oil would not be forced through valves, but would be transferred to a cylinder with a smaller cross-section, which actuates a piston rod with a permanent magnet or coil with a correspondingly longer stroke.
The two variants can also be combined with each other.
DESCRIPTION BASED ON THE DRAWINGS
Fig. 1 shows the current state of the art schematically using a conventional motor vehicle suspension strut (1) with a coil spring (2), plunger (3) and hydraulic damper (4), which dampens the vertical movement of the wheel (5) by the resistance when the hydraulic oil (6) is pressed through the gaps or valves (7) into the secondary volume (8) of the damper.
Fig. 2 shows the design of an electromagnetic damper (6) which transforms the vertical movement of the wheel (5) via a lever transmission (9-12) to a long stroke of a moving magnet core (13) in an induction coil (14). Fig 3 shows the solution with hydraulic transformation: The primary cylinder (14) of the shock absorber moves the hydraulic oil (6) through the branch (15) into the slimmer secondary cylinder (16), which via the piston rod (17) moves the induction coil (18) in the air gap of a stationary permanent magnet (19)
Fig. 4 shows the same hydraulic transformation, but here with a moving magnet rod (20) which is moved as a core in a stationary electric coil (21)

Claims

Claims
1. Electromechanical shock absorber on vehicles for energy recovery, wherein the vertical wheel movements are translated to a longer path via lever mechanism or hydraulic transformation and then converted into electrical energy.
2. Electromechanical shock absorber as to claim 1 , wherein the movement is transmitted to a permanent magnet, moving within the centre of an electric coil
3. Electromechanical shock absorber according to claim 1 , wherein that movement is transmitted to a plunger coil which moves in the air gap of a permanent magnet system.
4. Electromechanical shock absorber as to claim 1 - 3, wherein the alternating voltages induced in the coils are rectified and passed on to charge the vehicle batteries.
PCT/IB2020/000110 2020-03-24 2020-03-24 Electromechanical shock absorber for energy recovery WO2021191647A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IB2020/000110 WO2021191647A1 (en) 2020-03-24 2020-03-24 Electromechanical shock absorber for energy recovery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2020/000110 WO2021191647A1 (en) 2020-03-24 2020-03-24 Electromechanical shock absorber for energy recovery

Publications (1)

Publication Number Publication Date
WO2021191647A1 true WO2021191647A1 (en) 2021-09-30

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2020/000110 WO2021191647A1 (en) 2020-03-24 2020-03-24 Electromechanical shock absorber for energy recovery

Country Status (1)

Country Link
WO (1) WO2021191647A1 (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11343962A (en) * 1998-06-01 1999-12-14 Kazuhiro Kawahara Automobile shock generator
CH690396A5 (en) 1994-10-17 2000-08-31 Thomas Robert Metall Elektro Vacuum cleaner with water reservoir provided in cleaner housing
DE102008030577A1 (en) * 2008-06-27 2009-01-15 Daimler Ag Hydraulic shock absorber for vehicles is fitted with bypass which connects working chambers with second hydraulic damper whose piston moves within coil and generates electricity
GB2465423A (en) * 2008-11-21 2010-05-26 Harel Shachar Regenerative shock absorber comprising electromagnetic linear generator or mechanical movement converter
WO2016097898A1 (en) * 2014-12-19 2016-06-23 Sistemi Sospensioni S.P.A. Regenerative hydraulic shock-absorber for vehicle suspension
CN105711368A (en) * 2016-03-07 2016-06-29 大连理工大学 Electromagnetic energy harvesting system based on passive suspension
CN106224425A (en) * 2016-08-16 2016-12-14 江苏大学 A kind of half active energy regenerative suspension shock-absorber and method for determining size thereof based on composite excitation
CN110461699A (en) * 2017-03-20 2019-11-15 舍弗勒技术股份两合公司 Impact damper

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH690396A5 (en) 1994-10-17 2000-08-31 Thomas Robert Metall Elektro Vacuum cleaner with water reservoir provided in cleaner housing
JPH11343962A (en) * 1998-06-01 1999-12-14 Kazuhiro Kawahara Automobile shock generator
DE102008030577A1 (en) * 2008-06-27 2009-01-15 Daimler Ag Hydraulic shock absorber for vehicles is fitted with bypass which connects working chambers with second hydraulic damper whose piston moves within coil and generates electricity
GB2465423A (en) * 2008-11-21 2010-05-26 Harel Shachar Regenerative shock absorber comprising electromagnetic linear generator or mechanical movement converter
WO2016097898A1 (en) * 2014-12-19 2016-06-23 Sistemi Sospensioni S.P.A. Regenerative hydraulic shock-absorber for vehicle suspension
CN105711368A (en) * 2016-03-07 2016-06-29 大连理工大学 Electromagnetic energy harvesting system based on passive suspension
CN106224425A (en) * 2016-08-16 2016-12-14 江苏大学 A kind of half active energy regenerative suspension shock-absorber and method for determining size thereof based on composite excitation
CN110461699A (en) * 2017-03-20 2019-11-15 舍弗勒技术股份两合公司 Impact damper

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