WO2004085194A1 - An electric automobile - Google Patents

An electric automobile Download PDF

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Publication number
WO2004085194A1
WO2004085194A1 PCT/KR2004/000681 KR2004000681W WO2004085194A1 WO 2004085194 A1 WO2004085194 A1 WO 2004085194A1 KR 2004000681 W KR2004000681 W KR 2004000681W WO 2004085194 A1 WO2004085194 A1 WO 2004085194A1
Authority
WO
WIPO (PCT)
Prior art keywords
generator
automobile
battery
rear wheels
driving motor
Prior art date
Application number
PCT/KR2004/000681
Other languages
French (fr)
Inventor
Jung Hun Choi
Original Assignee
Jung Hun Choi
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 Jung Hun Choi filed Critical Jung Hun Choi
Publication of WO2004085194A1 publication Critical patent/WO2004085194A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L7/00—Electrodynamic brake systems for vehicles in general
    • B60L7/10—Dynamic electric regenerative braking
    • B60L7/16—Dynamic electric regenerative braking for vehicles comprising converters between the power source and the motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
    • 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
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/112—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction clutches in combination with brakes
    • H02K7/1125—Magnetically influenced friction clutches and brakes
    • 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
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/421—Speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B60Y2200/91—Electric vehicles
    • 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 present invention relates to an electric automobile, and more particularly, to an improved electric automobile adapted to be capable of recharging a battery using kinetic energy based on inertia.
  • the pollution-free automobiles electric automobiles, particularly, are typically classified into two types.
  • the first type automobiles are generally driven by an electric motor using a battery as a main power source.
  • the second type automobiles are hybrid type electric automobiles in which an engine using fossil fuels and a motor driven by a battery are selectively used.
  • the disclosed electric automobile includes a bevel gear device installed on a wheel shaft fixedly mounted on both rear wheels and rotating simultaneously therewith by means of bearings, large rotary wheels rotated by the bevel gear device, and a high- speed generator driven by the large rotary wheels, for recharging a battery.
  • the electric automobile still has a limitation in that a charging efficiency of the battery cannot be maximized because the generator is only driven in association with the traveling of the electric automobile.
  • Korean Patent Publication No. 2000-010126 discloses an auxiliary charging device of an electric automobile.
  • the disclosed electric automobile includes a hopper for collecting air induced through front or side portions of the automobile, a fan for generating a rotational power by flowing of the air developed by wind induced through the hopper, a fan driving switching unit for transmitting to or isolating from the generator, a revolution number sensor for detecting an electrical signal indicating the number of revolutions of the fan, and a solar cell installed on the roof of the automobile.
  • Korean Patent Publication No. 1998-066829 discloses an automobile driven by an engine or a generator installed on a driving shaft thereof.
  • FIG. 1 is a schematic plan view of an electric automobile according to the present invention
  • FIG. 2 is an extracted perspective view of a generator and a second clutch of the electric automobile according to the present invention
  • FIG. 3 is a cross-sectional view of the generator of the electric automobile according to the present invention.
  • an object of the present invention to provide an electric automobile which can extend its driving distance per one charging operation by charging a battery using kinetic energy developed by inertia of the automobile. It is another object of the present invention to provide an electric automobile which can increase an output capacity of a generator with a relatively less rotational power by making a rotor of the generator relatively large.
  • an electric automobile comprising a driving motor which is connected to at least one of the front and rear wheels of the automobile and in which power transmission is switched by first clutch means; a battery for supplying an electric power to the driving motor; a generator which is installed on at least one side of the front wheels or the rear wheels, for generating energy to be used for recharging the battery, and in which power transmission from the front wheels or the rear wheels to the generator is switched by second clutch means; sensing means for sensing the load and speed of the driving motor; and a controller for selectively operating the first and second clutch means by detecting the driving force of the driving motor and actuating the generator by the driving force of the front or rear wheels based on inertia of the automobile, for recharging the battery.
  • the generator comprises a rotor rotatably installed relative to the front wheel shaft or the rear wheel shaft and selectively rotated by the second clutch means, and a stator installed on the outer peripheral surface of the rotor and fixed on the vehicle body.
  • the second clutch means includes a stopper plate installed on each of the front and rear wheels or the front and rear wheel shafts, a disk supported on the stopper plate by a damper, and an electromagnet for making the rotor to be connected to or separated from the disk and installed on the vehicle body or bearings suspended on the vehicle body.
  • the front and rear wheels accelerate and kinetic energy is generated accordingly.
  • the generator is driven by the rotational power of the front wheels or rear wheels originating from the kinetic energy, thereby recharging the battery. During this procedure, transmission of the driving force of the front and rear wheels to the driving motor is interrupted.
  • FIGS. 1 through 3 show an electric automobile according to an embodiment of the present invention
  • the electric automobile 10 includes a front wheel shaft 14 and a rear wheel shaft 15 rotatably installed on bearings 12 and 13 suspended on a vehicle body (not shown), respectively, and front wheels 16, 17 and rear wheels 18, 19 rotatably installed on the front wheel shaft 14 and the rear wheel shaft 15, respectively.
  • At least one of the front wheel shaft 14 and the rear wheel shaft 15 is driven by a driving motor 20, and the driving motor 20 and the front wheel shaft 14 or the rear wheel shaft 15 for driving, are connected to each other by a first clutch 21 so that transmission of the driving force of the driving motor 20 is switched.
  • the driving motor 20 and either the front or rear wheel shaft 14 or 15 for driving are, of course, connected to each other by a common differential gear unit.
  • the electric automobile 10 may further include a small gasoline engine 70, which is selectively connected to the first clutch 21 , to transmit driving force to the front wheel shaft 14 or the rear wheel shaft 15. Also, the driving force of the gasoline engine 70 may be selectively transmitted to the front wheels 16, 17 and the rear wheels 18, 19 by separately providing an additional clutch.
  • a small gasoline engine 70 which is selectively connected to the first clutch 21 , to transmit driving force to the front wheel shaft 14 or the rear wheel shaft 15.
  • the driving force of the gasoline engine 70 may be selectively transmitted to the front wheels 16, 17 and the rear wheels 18, 19 by separately providing an additional clutch.
  • the electric automobile 10 includes a rechargeable battery 30 for supplying an electric power to the driving motor 20. Also, at least one generator 40 for recharging the battery 30 by using kinetic energy derived from moment of inertia of the electric automobile 10, is provided at the front and rear wheel shafts 14, 15 or the front and rear wheels 16 through 19.
  • the generator 40 for recharging the battery 30 by using kinetic energy derived from moment of inertia of the electric automobile 10, is provided at the front and rear wheel shafts 14, 15 or the front and rear wheels 16 through 19.
  • the electric automobile 10 includes a controller 60 for selectively operating the first and second clutches 21 and 50 by detecting the driving force of the driving motor 20 during traveling, thereby actuating the generator 40 for recharging the battery 30.
  • the controller 60 includes a sensor 61 for sensing the load and speed of the driving motor 20, and a microprocessor 62 for controlling the first and second clutches 21 and 50 according to the signal sensed by the sensor 61.
  • the generator 40 includes a rotor 41 rotatably installed relative to the front wheel shaft 14 or the rear wheel shaft 15, and a stator 42 installed on the outer peripheral surface of the rotor 41 and fixed on the vehicle body or the bearings 12, 13.
  • a stator 42 installed on the outer peripheral surface of the rotor 41 and fixed on the vehicle body or the bearings 12, 13.
  • the second clutch 50 includes a disk 52 simultaneously driven with the front and rear wheels 16 through 19 or the front and rear wheel shafts 14, 15, and an electromagnet 51 for selectively connecting or separating the rotor 41 to or from the disk 52.
  • the disk 52 is supported to a stopper plate 53 installed on the front and rear wheels 16 through 19 or the front and rear wheel shafts 14, 15 by a damper 54.
  • the second clutch 50 is not limited to the structure shown in the illustrative embodiment, and any power transmission means that can selectively transmit power of the front and rear wheels 16 through 19 or the front and rear wheel shafts 14 to the generator 40, 15, can be used as the second clutch 50.
  • Each of the first or second clutch 21 , 50 and the generator 40 may further include a separate sealing means for preventing water from being induced from the outside during traveling.
  • rotation power of the generator 40 which is installed outside the front and rear wheels 16 through 19, may be derived from the driving force of the front and rear wheels16 through 19.
  • the generator 40 should be fixed to the vehicle body by means of a separate bracket.
  • the aforementioned electric automobile 10 operates as follows.
  • the electric automobile 10 travels in such a manner that the driving force of the driving motor 20 is transmitted to the front wheel shaft 14 or the rear wheel shaft 15 via the first clutch 21 in a state in which a battery 30 is charged. As the speed of the automobile 10 increases, the automobile undergoes moment of inertia, so that the front wheels 16 and 17 and the rear wheels 18 and 19 are accelerated.
  • the sensor 61 detects the load and speed of the driving motor 30, and a signal output from the sensor 61 , indicating the sensed load, is transferred to the microprocessor 62 of the controller 60.
  • the microprocessor 62 compares the signal with a reference signal indicating a predetermined load.
  • the microprocessor 62 of the controller 60 controls the first clutch 21 to interrupt power transmission between the driving motor 20 and the front or rear wheel shaft 14, 15, and to transmit power to the electromagnet 51 of the second clutch 50 to allow the disk 52 rotating simultaneously with the front and rear wheels 16 through 19 or the front and rear wheel shafts 14, 15 to tightly contact the rotor 41 , thereby rotating the rotor 41 of the generator 40.
  • the sensor 61 senses the speed of the automobile 10.
  • the controller 60 controls the driving motor 20 to drive and controls the first clutch 21 to transmit a driving force of the driving motor 20 to the front wheel shafts 16, 17 or the rear wheels 18, 19, thereby making the automobile 10 keep driving.
  • the controller 60 interrupts power supply to the electromagnet 51 of the second electric clutch 50 and the damper 54 allows the disk 52 to be separated from the rotor 41 of the generator 40, thereby interrupting transmission of power to the generator 40.
  • the electric automobile according to the present invention can convert kinetic energy based on the moment of inertia into electrical energy to use the same for recharging a battery for the automobile that is traveling, thereby prolonging a charging cycle of the battery and greatly extending a driving distance per one charging operation, the moment of inertia naturally occurring to the automobile traveling on a downhill road. Also, it is possible to avoid the inconvenience of having to frequently recharge the battery mounted on the electric automobile, which is due to a short driving distance at one charging operation, and to mount many batteries on the automobile for ensuring a long distance travel, which results in a reduction in the driving speed of the automobile. Further, since the electric automobile is equipped with a gasoline engine as a power source, the power from the gasoline engine can be used when the automobile is driving on an uphill road, where a relatively large amount of power is required, thereby preventing the battery from being abruptly discharged.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

Provided is an electric automobile comprising a driving motor which is connected to at least one of the front and rear wheels of the automobile and in which power transmission is switched by a first clutch, a battery for supplying an electric power to the driving motor, a generator which is installed on at least one side of the front wheels or the rear wheels, for generating energy to be used for recharging the battery, and in which power transmission from the front wheels or the rear wheels to the generator is switched by a second clutch, a sensor for sensing the load and speed of the driving motor, and a controller for selectively operating the first and second clutches by detecting the driving force of the driving motor and actuating the generator by the driving force of the front or rear wheels based on inertia of the automobile, for recharging the battery.

Description

Description AN ELECTRIC AUTOMOBILE
Technical Field The present invention relates to an electric automobile, and more particularly, to an improved electric automobile adapted to be capable of recharging a battery using kinetic energy based on inertia.
Background Art In recent years, environmental pollution due to the global greenhouse effect has become a worldwide concern. In particular, air contamination caused by exhaust gas emission from motor vehicles is quite a serious problem. Accordingly, attempts to develop automobiles causing substantially no environmental pollution, for example, electric automobiles, hydrogen automobiles, automobiles using solar cells, and the like, as promising substitutes for conventional automobiles using petroleum fuel, have been vigorously made by automobile manufacturers and organizations associated with the automobile industry throughout the world.
In parallel with the trend toward pollution-free automobiles, research into batteries as main power source of pollution-free automobiles, delayed blast of hydrogen, and solar cells, is vigorously being conducted.
Among the pollution-free automobiles, electric automobiles, particularly, are typically classified into two types. The first type automobiles are generally driven by an electric motor using a battery as a main power source. The second type automobiles are hybrid type electric automobiles in which an engine using fossil fuels and a motor driven by a battery are selectively used.
However, such an electric automobile, which is operated by driving an electric motor using a charged battery, involves several problems, including inconvenience of having to recharge the battery when the charged battery is used up, which frequently occurs. In particular, an electric automobile using only a motor as a main power source makes a long distance travel difficult. To address this problem, that is, to increase the driving distance per one charging operation, mounting a large capacity battery on the automobile may be attempted, which, however, undesirably increases the weight of the battery. In order to solve these problems, there has been proposed a method of charging a battery while an automobile is driving. Korean Patent Publication No. 2002-0008137 discloses an automatic generating apparatus for an electric automobile. The disclosed electric automobile includes a bevel gear device installed on a wheel shaft fixedly mounted on both rear wheels and rotating simultaneously therewith by means of bearings, large rotary wheels rotated by the bevel gear device, and a high- speed generator driven by the large rotary wheels, for recharging a battery.
However, the electric automobile still has a limitation in that a charging efficiency of the battery cannot be maximized because the generator is only driven in association with the traveling of the electric automobile.
Korean Patent Publication No. 2000-010126 discloses an auxiliary charging device of an electric automobile. The disclosed electric automobile includes a hopper for collecting air induced through front or side portions of the automobile, a fan for generating a rotational power by flowing of the air developed by wind induced through the hopper, a fan driving switching unit for transmitting to or isolating from the generator, a revolution number sensor for detecting an electrical signal indicating the number of revolutions of the fan, and a solar cell installed on the roof of the automobile.
A problem with the electric automobile is insufficient charging efficiency due to increased air resistance caused by the wind generated during the traveling of the automobile. Korean Patent Publication No. 1998-066829 discloses an automobile driven by an engine or a generator installed on a driving shaft thereof.
Description of Drawings
FIG. 1 is a schematic plan view of an electric automobile according to the present invention;
FIG. 2 is an extracted perspective view of a generator and a second clutch of the electric automobile according to the present invention; and FIG. 3 is a cross-sectional view of the generator of the electric automobile according to the present invention.
Disclosure of Invention Technical Problem
To solve the above problems, it is an object of the present invention to provide an electric automobile which can extend its driving distance per one charging operation by charging a battery using kinetic energy developed by inertia of the automobile. It is another object of the present invention to provide an electric automobile which can increase an output capacity of a generator with a relatively less rotational power by making a rotor of the generator relatively large.
It is still another object of the present invention to provide an electric automobile which can increase reliability in performance and safety by extending its driving distance.
Technical Solution
To accomplish the above object of the present invention, there is provided an electric automobile comprising a driving motor which is connected to at least one of the front and rear wheels of the automobile and in which power transmission is switched by first clutch means; a battery for supplying an electric power to the driving motor; a generator which is installed on at least one side of the front wheels or the rear wheels, for generating energy to be used for recharging the battery, and in which power transmission from the front wheels or the rear wheels to the generator is switched by second clutch means; sensing means for sensing the load and speed of the driving motor; and a controller for selectively operating the first and second clutch means by detecting the driving force of the driving motor and actuating the generator by the driving force of the front or rear wheels based on inertia of the automobile, for recharging the battery.
In the present invention, the generator comprises a rotor rotatably installed relative to the front wheel shaft or the rear wheel shaft and selectively rotated by the second clutch means, and a stator installed on the outer peripheral surface of the rotor and fixed on the vehicle body. Also, the second clutch means includes a stopper plate installed on each of the front and rear wheels or the front and rear wheel shafts, a disk supported on the stopper plate by a damper, and an electromagnet for making the rotor to be connected to or separated from the disk and installed on the vehicle body or bearings suspended on the vehicle body.
In the electric automobile according to the present invention, as the driving speed increases, the front and rear wheels accelerate and kinetic energy is generated accordingly. The generator is driven by the rotational power of the front wheels or rear wheels originating from the kinetic energy, thereby recharging the battery. During this procedure, transmission of the driving force of the front and rear wheels to the driving motor is interrupted.
Best mode
FIGS. 1 through 3 show an electric automobile according to an embodiment of the present invention
Referring to the drawings, the electric automobile 10 includes a front wheel shaft 14 and a rear wheel shaft 15 rotatably installed on bearings 12 and 13 suspended on a vehicle body (not shown), respectively, and front wheels 16, 17 and rear wheels 18, 19 rotatably installed on the front wheel shaft 14 and the rear wheel shaft 15, respectively. At least one of the front wheel shaft 14 and the rear wheel shaft 15 is driven by a driving motor 20, and the driving motor 20 and the front wheel shaft 14 or the rear wheel shaft 15 for driving, are connected to each other by a first clutch 21 so that transmission of the driving force of the driving motor 20 is switched. Here, the driving motor 20 and either the front or rear wheel shaft 14 or 15 for driving, are, of course, connected to each other by a common differential gear unit. Here, the electric automobile 10 may further include a small gasoline engine 70, which is selectively connected to the first clutch 21 , to transmit driving force to the front wheel shaft 14 or the rear wheel shaft 15. Also, the driving force of the gasoline engine 70 may be selectively transmitted to the front wheels 16, 17 and the rear wheels 18, 19 by separately providing an additional clutch.
The electric automobile 10 includes a rechargeable battery 30 for supplying an electric power to the driving motor 20. Also, at least one generator 40 for recharging the battery 30 by using kinetic energy derived from moment of inertia of the electric automobile 10, is provided at the front and rear wheel shafts 14, 15 or the front and rear wheels 16 through 19. The generator
40 is selectively connected to the front and rear wheel shafts 14, 15 or the front and rear wheels 16 through 19 by a second clutch 50. The electric automobile 10 includes a controller 60 for selectively operating the first and second clutches 21 and 50 by detecting the driving force of the driving motor 20 during traveling, thereby actuating the generator 40 for recharging the battery 30.
The controller 60 includes a sensor 61 for sensing the load and speed of the driving motor 20, and a microprocessor 62 for controlling the first and second clutches 21 and 50 according to the signal sensed by the sensor 61.
As shown in FIG. 2, the generator 40 includes a rotor 41 rotatably installed relative to the front wheel shaft 14 or the rear wheel shaft 15, and a stator 42 installed on the outer peripheral surface of the rotor 41 and fixed on the vehicle body or the bearings 12, 13. Here, power transmission to the rotor
41 is switched by the second clutch 50 from the front wheel shaft 14 or the rear wheel shaft 15. The second clutch 50 includes a disk 52 simultaneously driven with the front and rear wheels 16 through 19 or the front and rear wheel shafts 14, 15, and an electromagnet 51 for selectively connecting or separating the rotor 41 to or from the disk 52. The disk 52 is supported to a stopper plate 53 installed on the front and rear wheels 16 through 19 or the front and rear wheel shafts 14, 15 by a damper 54. The second clutch 50 is not limited to the structure shown in the illustrative embodiment, and any power transmission means that can selectively transmit power of the front and rear wheels 16 through 19 or the front and rear wheel shafts 14 to the generator 40, 15, can be used as the second clutch 50. Each of the first or second clutch 21 , 50 and the generator 40 may further include a separate sealing means for preventing water from being induced from the outside during traveling.
Although not shown, rotation power of the generator 40, which is installed outside the front and rear wheels 16 through 19, may be derived from the driving force of the front and rear wheels16 through 19. In this case, the generator 40 should be fixed to the vehicle body by means of a separate bracket. A connection shaft for transmission of rotational power of the front wheels 16, 17 or the rear wheels 18, 19, i.e., a shaft having a universal joint, is, of course, connected to the generator 40. The aforementioned electric automobile 10 operates as follows.
The electric automobile 10 travels in such a manner that the driving force of the driving motor 20 is transmitted to the front wheel shaft 14 or the rear wheel shaft 15 via the first clutch 21 in a state in which a battery 30 is charged. As the speed of the automobile 10 increases, the automobile undergoes moment of inertia, so that the front wheels 16 and 17 and the rear wheels 18 and 19 are accelerated.
As described above, when a load applied to the driving motor 20 of the automobile 10 that is traveling on a downhill road or a flat road is reduced to a predetermined level or less, the sensor 61 detects the load and speed of the driving motor 30, and a signal output from the sensor 61 , indicating the sensed load, is transferred to the microprocessor 62 of the controller 60. The microprocessor 62 compares the signal with a reference signal indicating a predetermined load. If the load of the driving motor 20 is lower than the predetermined load, the microprocessor 62 of the controller 60 controls the first clutch 21 to interrupt power transmission between the driving motor 20 and the front or rear wheel shaft 14, 15, and to transmit power to the electromagnet 51 of the second clutch 50 to allow the disk 52 rotating simultaneously with the front and rear wheels 16 through 19 or the front and rear wheel shafts 14, 15 to tightly contact the rotor 41 , thereby rotating the rotor 41 of the generator 40. In such a manner, when electricity is generated by the generator 40, the electricity is used in recharging the battery 30 by means of a rectifier. If the driving speed is lowered, the sensor 61 senses the speed of the automobile 10. Then, the controller 60 controls the driving motor 20 to drive and controls the first clutch 21 to transmit a driving force of the driving motor 20 to the front wheel shafts 16, 17 or the rear wheels 18, 19, thereby making the automobile 10 keep driving. In this case, the controller 60 interrupts power supply to the electromagnet 51 of the second electric clutch 50 and the damper 54 allows the disk 52 to be separated from the rotor 41 of the generator 40, thereby interrupting transmission of power to the generator 40.
While the present invention has been particularly shown and described with reference to preferred embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.
Industrial Applicability
As described above, the electric automobile according to the present invention can convert kinetic energy based on the moment of inertia into electrical energy to use the same for recharging a battery for the automobile that is traveling, thereby prolonging a charging cycle of the battery and greatly extending a driving distance per one charging operation, the moment of inertia naturally occurring to the automobile traveling on a downhill road. Also, it is possible to avoid the inconvenience of having to frequently recharge the battery mounted on the electric automobile, which is due to a short driving distance at one charging operation, and to mount many batteries on the automobile for ensuring a long distance travel, which results in a reduction in the driving speed of the automobile. Further, since the electric automobile is equipped with a gasoline engine as a power source, the power from the gasoline engine can be used when the automobile is driving on an uphill road, where a relatively large amount of power is required, thereby preventing the battery from being abruptly discharged.

Claims

Claims
1. An electric automobile comprising: a driving motor which is connected to at least one of the front and rear wheels of the automobile and in which power transmission is switched by first clutch means; a battery for supplying an electric power to the driving motor; a generator which is installed on at least one side of the front wheels or the rear wheels, for generating energy to be used for recharging the battery, and in which power transmission from the front wheels or the rear wheels to the generator is switched by second clutch means; sensing means for sensing the load and speed of the driving motor; and a controller for selectively operating the first and second clutch means by detecting the driving force of the driving motor and actuating the generator by the driving force of the front or rear wheels based on inertia of the automobile, for recharging the battery.
2. The electric automobile of claim 1 , wherein the generator comprises a rotor rotatably installed relative to the front wheel shaft or the rear wheel shaft and selectively rotated by the second clutch means, and a stator installed on the outer peripheral surface of the rotor and fixed on the vehicle body.
3. The electric automobile of claim 2, wherein the second clutch means includes a stopper plate installed on each of the front and rear wheels or the front and rear wheel shafts, a disk supported on the stopper plate by a damper, and an electromagnet for making the rotor to be connected to or separated from the disk and installed on the vehicle body or bearings suspended on the vehicle body.
PCT/KR2004/000681 2003-03-25 2004-03-25 An electric automobile WO2004085194A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2003-0018435 2003-03-25
KR10-2003-0018435A KR100519258B1 (en) 2003-03-25 2003-03-25 electric car

Publications (1)

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WO2004085194A1 true WO2004085194A1 (en) 2004-10-07

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WO (1) WO2004085194A1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2356967A1 (en) * 2008-11-13 2011-04-15 Antonia Sempere Navarro Perfected electric vehicle. (Machine-translation by Google Translate, not legally binding)
US8269457B2 (en) 2009-09-16 2012-09-18 Polaris Industries Inc. System and method for charging an on-board battery of an electric vehicle
CN102707715A (en) * 2012-06-18 2012-10-03 苏州欧拓电子科技有限公司 Device for testing motor controller of electric vehicle
WO2013115498A1 (en) * 2012-02-01 2013-08-08 Kim Kyung Soo Driving power supply device for electric vehicle and control method therefor
CN104442440A (en) * 2014-11-27 2015-03-25 冯军 Electric automobile power system and electric automobile
US9187083B2 (en) 2009-09-16 2015-11-17 Polaris Industries Inc. System and method for charging an on-board battery of an electric vehicle
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US10780770B2 (en) 2018-10-05 2020-09-22 Polaris Industries Inc. Hybrid utility vehicle
US11370266B2 (en) 2019-05-16 2022-06-28 Polaris Industries Inc. Hybrid utility vehicle
US11884148B2 (en) 2014-12-19 2024-01-30 Polaris Industries Inc. Utility vehicle

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2356967A1 (en) * 2008-11-13 2011-04-15 Antonia Sempere Navarro Perfected electric vehicle. (Machine-translation by Google Translate, not legally binding)
US9187083B2 (en) 2009-09-16 2015-11-17 Polaris Industries Inc. System and method for charging an on-board battery of an electric vehicle
US8269457B2 (en) 2009-09-16 2012-09-18 Polaris Industries Inc. System and method for charging an on-board battery of an electric vehicle
US8323147B2 (en) 2009-09-16 2012-12-04 Swissauto Powersport Llc Electric vehicle and on-board battery charging apparatus therefor
US8567541B2 (en) 2009-09-16 2013-10-29 Swissauto Powersport Llc Electric vehicle and on-board battery charging apparatus therefor
WO2013115498A1 (en) * 2012-02-01 2013-08-08 Kim Kyung Soo Driving power supply device for electric vehicle and control method therefor
CN102707715A (en) * 2012-06-18 2012-10-03 苏州欧拓电子科技有限公司 Device for testing motor controller of electric vehicle
CN104442440A (en) * 2014-11-27 2015-03-25 冯军 Electric automobile power system and electric automobile
US11884148B2 (en) 2014-12-19 2024-01-30 Polaris Industries Inc. Utility vehicle
US12122228B2 (en) 2014-12-19 2024-10-22 Polaris Industries Inc. Utility vehicle
US10744868B2 (en) 2016-06-14 2020-08-18 Polaris Industries Inc. Hybrid utility vehicle
US10780770B2 (en) 2018-10-05 2020-09-22 Polaris Industries Inc. Hybrid utility vehicle
US11370266B2 (en) 2019-05-16 2022-06-28 Polaris Industries Inc. Hybrid utility vehicle

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