WO2009151252A2

WO2009151252A2 - Device for increasing the energy efficiency of a vehicle using a spring

Info

Publication number: WO2009151252A2
Application number: PCT/KR2009/003076
Authority: WO
Inventors: 이성
Original assignee: Lee Sung
Priority date: 2008-06-10
Filing date: 2009-06-09
Publication date: 2009-12-17
Also published as: WO2009151252A4; WO2009151252A3

Abstract

The present invention relates to a device for increasing the energy efficiency of a vehicle using a spring, which accumulates rotating forces of wheels into an elastic energy of the spring during braking or deceleration of the vehicle, and reuses the elastic energy accumulated in the spring as auxiliary rotating forces for driving the wheel shafts during starting or acceleration of the vehicle, thereby increasing the energy efficiency and improving the fuel efficiency of the vehicle at the same time. The device for increasing the energy efficiency of a vehicle using a spring according to the present invention includes: a first sensor installed on the brake pedal of the vehicle to sense whether or not the brake pedal is pressed; a second sensor installed on the accelerator pedal of the vehicle to sense whether or not the accelerator pedal is pressed; a third sensor installed on a wheel shaft of the vehicle to sense the rotations per unit of time; a rotary shaft rotatably installed on one side of the wheel shaft; a spring installed on the rotary shaft such that the spring is wound by the rotation of the rotary shaft during braking or deceleration of the vehicle and rotates the rotary shaft by a restored elasticity during starting or acceleration of the vehicle; a fourth sensor installed in the spring to sense whether the spring is restored or not by detecting pressure according to the operation of the spring; a controller installed in the vehicle to receive signals from the first sensor, the second sensor, the third sensor, and the fourth sensor and generate a control signal; and an electric driving unit which is interposed between the wheel shaft and the rotary shaft, and which interlocks the wheel shaft and the rotary shaft such that in accordance with the control signal received from the controller, the rotating force of the wheel shaft can be transmitted to the rotary shaft to accumulate an elastic energy in the spring during braking or deceleration of the vehicle and the reverse rotating force of the rotary shaft generated by the restoration of the elastic force of the spring can be converted into a forward direction to transmit auxiliary rotating force to the wheel shaft during starting or acceleration of the vehicle, and which separates the wheel shaft and the rotary shaft from each other such that they are not interlocked with each other immediately after the restoration of the spring.

Description

Energy efficiency increasing device for vehicle using the mainspring

The present invention relates to an energy efficiency increasing apparatus for a vehicle that can increase fuel efficiency and improve fuel efficiency.

In general, the vehicle repeats driving and braking using energy generated through combustion of fuel such as gasoline in the internal combustion engine.

The vehicle is equipped with a brake system, which is used to slow down or stop a vehicle and maintain a parking state. Generally, the brake system converts the kinetic energy of the vehicle into the thermal energy of the brake pad. After the brake is released into the atmosphere to brake the friction brakes are most commonly used.

However, although the braking energy for stopping the running vehicle occupies a considerable amount of the energy of the vehicle generated by the combustion of the fossil fuel, most of this braking energy is used for the purpose of stopping the vehicle. The brake pads are converted into thermal energy and released into the atmosphere. This release of braking energy causes a reduction in the overall energy efficiency of the vehicle.

In addition, as the fuel is consumed more by the braking energy emitted, the fuel consumption is adversely affected, and at the same time, there is a problem in that a huge oil cost is consumed in operating a vehicle in the high oil price era.

An object of the present invention is to accumulate the rotational force of a wheel as a spring elastic energy at the time of braking or decelerating a vehicle and to recycle the elastic energy stored in the spring at the time of starting or accelerating the vehicle as an auxiliary rotational force for driving the wheel shaft. It is to provide a vehicle energy efficiency increasing device using a mainspring to improve the energy efficiency of the fuel cell and at the same time improve fuel efficiency.

An object of the present invention described above, the first sensor is installed on the brake pedal of the vehicle to detect whether the pressurized, the second sensor is installed on the accelerator pedal of the vehicle to detect whether the pressurized, on the wheel axle of the vehicle A third sensor installed to detect rotational speed per unit time, a rotational shaft rotatably installed on one side of the wheel shaft, and installed on the rotational shaft and wound by rotation of the rotational shaft during braking or deceleration of the vehicle, A spring that rotates the rotary shaft while elastically restoring during acceleration, a fourth sensor that is installed in the spring and detects a pressure according to the operation of the spring, and detects whether the spring is restored to an original shape, and is installed in the vehicle and the first sensor And a controller configured to receive signals from the second sensor, the third sensor, and the fourth sensor to generate a control signal, between the wheel shaft and the rotating shaft. When the vehicle is braking or decelerating according to a control signal received from the controller, the rotational force of the wheel shaft is transmitted to the rotational shaft so that the elastic energy is accumulated on the mainspring, and when the vehicle starts or accelerates, The reverse rotational power of the rotational shaft by the forward direction to the secondary shaft to transfer the auxiliary rotational power to the wheel shaft and the wheel shaft and the rotating shaft immediately after the original restoration of the mainspring It is achieved by providing a device for increasing energy efficiency for a vehicle using a mainspring comprising a unit.

According to a preferred feature of the present invention, it is provided on the rotary shaft further comprises a shaft fixing unit for fixing the rotary shaft so as not to rotate in accordance with a control signal received from the controller.

According to a more preferred feature of the invention, it is installed in the transmission of the vehicle senses the speed stage of the transmission and transmits to the controller by causing the controller whether the braking or deceleration of the vehicle through a combination with the signal of the first sensor And a fifth sensor for recognizing whether the vehicle starts or accelerates through a combination with the signal of the second sensor.

According to a more preferable feature of the present invention, it is installed in the interior of the vehicle further comprises an operation switch for controlling the operation of the electric unit by transmitting a signal to the controller according to the pressure.

According to a further preferred feature of the invention, the auxiliary rotational force of the rotating shaft transmitted to the wheel shaft by the electric unit is greater than the rotational force of the wheel shaft.

According to the energy efficient device for a vehicle using the mainspring according to the present invention, the rotational force of the wheel is stored as the elastic energy of the mainspring at the time of braking or deceleration of the vehicle, and the elastic energy stored in the mainspring at the start or acceleration of the vehicle is driven on the wheel shaft. By recycling the secondary rotational power for the, there is an excellent effect to improve the fuel efficiency while increasing the energy efficiency of the vehicle.

1 is a schematic structural diagram of a device for increasing energy efficiency for a vehicle using a mainspring according to the present invention;

Explanation of symbols on the main parts of the drawings

1: device for increasing energy efficiency of a vehicle using a mainspring according to the present invention

3: brake pedal

5: accelerator pedal

7: wheel axle

9: Transmission

10: first sensor

20: second sensor

30: third sensor

40: rotation axis

50: mainspring

60: fourth sensor

70: controller

80: electric unit

90: shaft fixing unit

100: fifth sensor

110: off switch

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are intended to describe in detail enough to be easily carried out by those skilled in the art to which the present invention pertains. This does not mean that the technical spirit and scope of the present invention is limited.

1 is a schematic structural diagram of a device for increasing energy efficiency for a vehicle using a mainspring according to the present invention.

The energy efficiency increasing apparatus 1 for a vehicle using the mainspring according to the present invention is installed on a vehicle (not shown) to convert the rotational force of the wheel shaft 7 to the elastic energy of the mainspring 50 during braking or deceleration of the vehicle. By accumulating and recycling the elastic energy accumulated in the spring 50 at the start or acceleration of the vehicle to the auxiliary rotational power of the wheel shaft 7, the energy efficiency of the vehicle can be increased and fuel efficiency can be improved. As shown in FIG. 1, the first sensor 10 installed on the brake pedal 3 of the vehicle and detecting the pressurization thereof, and the second sensor installed on the accelerator pedal 5 of the vehicle detecting the pressurization thereof ( 20, a third sensor 30 installed on the wheel shaft 7 of the vehicle for detecting rotational speed per unit time, a rotation shaft 40 rotatably installed on one side of the wheel shaft 7, and a rotation shaft 40 is installed in the braking shaft of the vehicle during braking or deceleration Winding 50 which is wound by before and rotates the rotational shaft 40 while elastically restoring at the start or acceleration of the vehicle, and is installed in the mainspring 50 and detects the pressure according to the operation of the mainspring 50 to The fourth sensor 60 for detecting the restoration of the original, and installed in the vehicle receives the signals of the first sensor 10, the second sensor 20, the third sensor 30 and the fourth sensor 60 The rotational force of the wheel shaft 7 during braking or deceleration of the vehicle in accordance with a controller 70 for generating a control signal and a control signal received between the wheel shaft 7 and the rotary shaft 40 and received from the controller 70. It is transmitted to the rotating shaft 40 so that the elastic energy is accumulated in the mainspring 50, and when the vehicle starts or accelerates, the reverse rotational power of the rotating shaft 40 by the elastic restoration of the mainspring 50 is converted in the forward direction to the wheel shaft. (7) interlock the wheel shaft (7) and the rotating shaft (40) so that the auxiliary rotational power is transmitted to the spring (50) Immediately after the original restoration of the wheel shaft 7 and the rotating shaft 40 is made to include a transmission unit 80 to separate so as not to interlock with each other.

The first sensor 10 is installed on the brake pedal 3 of the vehicle, and the first sensor 10 is actually braked by the driver's intention by detecting whether the brake pedal 3 of the vehicle is pressurized. Sensing whether it is transmitted to the controller 70 to be described later, it may be formed of various types of sensors according to the embodiment, but is preferably formed of a piezoelectric sensor installed on the brake pedal (3) to sense the pressure. Do.

The signal transmitted from the first sensor 10 to the controller 70 will be described later by causing the electric unit 80 to interlock the wheel shaft 7 and the rotation shaft 40 in the same direction when the vehicle is braked or decelerated. It serves as one of the parameters for generating a control signal which causes the winding 50 to be wound.

A second sensor 20 is installed on the accelerator pedal 5 of the vehicle, and the second sensor 20 is accelerated for the actual start by the driver's intention by detecting whether the accelerator pedal 5 of the vehicle is pressurized. Sensing whether it is transmitted to the controller 70 to be described later, it may be formed of various types of sensors according to the embodiment, it is preferably formed on the accelerator pedal (5) is formed of a piezoelectric sensor for detecting the pressure. Do.

The signal transmitted from the second sensor 20 to the controller 70 causes the transmission unit 80 to interlock the wheel shaft 7 and the rotation shaft 40 in different directions when the vehicle starts or accelerates. It acts as one of the parameters for generating a control signal such that the elastic rotational force of the rotary shaft 40 by 50) is transmitted to the auxiliary rotational force of the wheel shaft 7.

A third sensor 30 is installed on the wheel axle 7 of the vehicle, and the third sensor 30 is whether the actual vehicle is stationary or starting by sensing the number of revolutions per unit time of the wheel axle 7, or Detecting whether the vehicle is traveling at the low speed stage or the high speed stage and transmitting the same to the controller 70, which will be described later. However, the sensor 70 may be formed of various types of sensors, but it is installed on the wheel shaft 7. It is preferable that the encoder is formed of an encoder for detecting the rotation speed.

The signal transmitted from the third sensor 30 to the controller 70 will be described later by causing the electric unit 80 to interlock the wheel shaft 7 and the rotation shaft 40 in the same direction when the vehicle is braked or decelerated. It acts as one of the parameters for generating a control signal for winding the spring 50 to be wound, or when the vehicle starts or accelerates, the electric unit 80 rotates the wheel shaft 7 and the rotation shaft 40 in different directions. By interlocking with the spring 50 acts as one of the parameters for generating a control signal for transmitting the elastic rotational force of the rotary shaft 40 by the spring 50 to the auxiliary rotational force of the wheel shaft (7).

Rotating shaft 40 is rotatably installed on one side of the wheel shaft (7) of the vehicle, the rotary shaft 40 is rotated in conjunction with the wheel shaft (7) while winding or winding the spring 50 installed thereon By rotating the elastic force of the 50 to transmit the elastic rotational force to the wheel shaft (7) as a secondary rotational force, a bearing that is extended in parallel to one side of the wheel shaft (7) in the vehicle and fixed to the vehicle body (not shown) Is rotatably supported by

The spring 50 is installed on the above-described rotary shaft 40, which is wound by the rotation of the rotary shaft 40 when braking or decelerating the vehicle, accumulating braking energy in the form of elastic energy and starting the vehicle. At the time of acceleration or rotation, the rotary shaft 40 is rotated while elastically restored, one end of which is fixed to the rotary shaft 40 and the other end of which is fixed to the vehicle body (not shown).

Although the term spring 50 is used, the term includes all elastic members that vary in shape and size in which elastic energy can be accumulated with respect to rotation of the wheel shaft 7 in a predetermined direction.

The fourth sensor 60 is installed in the above-mentioned spring 50, and the fourth sensor 60 is restored to the original state of the spring 50 through the detection of the pressure according to the operation of the spring 50, that is, The presence of the elastic energy of the spring 50 is transmitted to the controller 70 to be described later, and may be formed of various types of sensors according to the embodiment, but is installed in the spring 50 and the spring 50 It is preferably formed of a piezoelectric sensor for sensing the pressure caused by winding and unwinding.

The fourth sensor 60 also causes the controller 70 to turn the wheels when a pressure above the set value is sensed in the spring 50 to prevent the spring 50 from being overwound and broken as excess elastic energy is accumulated. It generates a control signal for separating the shaft (7) and the rotating shaft (40) from each other.

The signal transmitted from the fourth sensor 60 to the controller 70 is started by the vehicle or shifted to the high speed stage, so that all the elastic energy of the mainspring 50 is transmitted to the auxiliary rotating power of the wheel shaft 7. When the motor unit 80 acts as one of the parameters for generating a control signal that separates the wheel shaft 7 and the rotation shaft 40 from each other. As the rotary shaft 40 is interlocked so as not to rotate, the spring 50 is prevented from being broken.

The controller 70 is installed in the vehicle, which is the first sensor 10, the second sensor 20, the third sensor 30, the fourth sensor 60 and the fifth to be described later. Receiving a signal from the sensor 100 to generate a control signal for operating the electric unit 80 described later, it is formed in the form of a printed circuit board in which a specific control circuit is implemented. The controller 70 may be included in the entire control unit (not shown) of the vehicle itself and may be integrally implemented, or may be formed separately from the entire control unit of the vehicle itself.

An electric unit 80 is installed between the above-described wheel shaft 7 and the rotating shaft 40, which is adapted to the wheel shaft during braking or deceleration of the vehicle according to a control signal received from the controller 70. The rotating force of (7) is transmitted to the rotating shaft 40 so that the spring 50 can be wound, and when the vehicle starts or accelerates, the reverse rotational power of the rotating shaft 40 by the elastic restoration of the spring 50 is forwarded. The wheel shaft 7 and the rotating shaft 40 are interlocked so that the auxiliary rotational force is transferred to the wheel shaft 7, and the rotation of the wheel shaft 7 is not transmitted to the rotating shaft 40 while the vehicle is running. ) And the rotation shaft 40 serves to block interlocking.

According to the control signal, the electric unit 80 interlocks one axis with respect to one axis so as to rotate in the same direction, or another axis rotates with respect to one axis so as to rotate in different directions. Or, it may be implemented as a plurality of gearboxes similar to a kind of transmission having three transmission modes such that only one shaft is rotated. In this case, the electric unit 80 is integrally formed on the wheel shaft 7 and the rotation shaft 40, respectively. It includes a gear installed. The transmission unit 80 also preferably includes a disk clutch (not shown) for gear protection according to the rotation rate in the process of outputting the output shaft to the wheel shaft.

For example, when the braking or deceleration of the vehicle is performed, only one gear is interposed between the wheel shaft 7 and the rotation shaft 40 so that the rotation shaft 40 is in the same direction as the rotation direction of the wheel shaft 7. Winding the spring 50 by interlocking with the rotation, and when the vehicle starts or accelerates, two gears are interposed between the wheel shaft 7 and the rotating shaft 40 to rotate the shaft 40 by the elastic energy of the spring 50. The reverse rotation of the rotation is interlocked to be rotated in different directions so as to be transferred to the wheel shaft (7), and when the elastic energy of the spring 50 is exhausted, the rotary shaft 40 against the rotation of the wheel shaft (7) It is preferable to be configured not to interlock.

When the vehicle starts or accelerates, the auxiliary rotational force of the rotating shaft 40 transmitted to the wheel shaft 7 by the aforementioned electric unit 80 is preferably greater than the rotation force of the wheel shaft 7. When the auxiliary rotational force of the rotation shaft 40 transmitted to the wheel shaft 7 by the aforementioned electric unit 80 during acceleration is smaller than the rotation force of the wheel shaft 7, the rotation of the rotation shaft 40 is the wheel shaft 7. This is because the rotation of the wheel shaft (7) can act as a hindering element rather than further increasing the rotational force.

For the same reason as described above, when the auxiliary rotating power is transmitted to the wheel shaft 7 by the aforementioned electric unit 80 at the time of starting or accelerating the vehicle, the rotation speed of the output shaft (not shown) of the electric unit 80 is It is preferred to be larger than the rotational speed of the wheel shaft 7.

The shaft fixing unit 90 is installed on the above-described rotating shaft 40, and the shaft fixing unit 90 may not interlock with the wheel shaft 7 and the rotating shaft 40 according to a control signal received from the controller 70. In this case, the rotating shaft 40 is fixed so as not to rotate so that the accumulated elastic energy of the mainspring 50 is maintained as it is until the vehicle starts or accelerates. The rotating shaft 40 is controlled according to a control signal received from the controller 70. It may be configured in a form similar to the electric gripper for gripping or releasing the holding state on both sides of the outer peripheral surface.

The fifth sensor 100 is installed in the transmission 9 of the vehicle, and the fifth sensor 100 transmits a signal through the detection of the short shift of the transmission 9 to the controller 70, thereby providing a controller 70. Allows the vehicle to recognize whether the vehicle is braked or decelerated by combining with the signal of the first sensor 10 to store the power of the wheel shaft 7 as the elastic energy of the spring 50, or the second sensor 20. By detecting the start or acceleration of the vehicle through a combination of the signal of) to the elastic energy of the mainspring 50 is transmitted to the wheel shaft (7) as an auxiliary energy, detecting the short shift position of the transmission (9) It can be formed as a position sensor.

The signal transmitted from the fifth sensor 100 to the controller 70 is shifted to the high speed stage after the vehicle is started and all the elastic energy of the mainspring 50 is transmitted to the auxiliary rotational force of the wheel shaft 7. When the vehicle is driven by acting as one of the parameters for generating a control signal which causes the electric unit 80 to separate the wheel shaft 7 and the rotation shaft 40 together with the signal of the fourth sensor 60 when it is made. B accelerates the rotational shaft 40 by the rotation of the wheel shaft (7) during acceleration to prevent the spring 50 from being broken.

The operation switch 110 is installed in the interior of the vehicle. The operation switch 110 transmits a signal to the controller 70 according to pressure to control the operation of the electric unit 80. It is possible to turn on or off the operation of the energy efficiency increasing apparatus 1 for a vehicle using a mainspring according to the present invention. In the off state of the operation switch 110, the rotary shaft 40 and the wheel shaft 7 are released from interlocking after the elastic energy of the spring 50 is accumulated or the elastic energy is reduced to the wheel shaft 7. To keep the state constant.

The driver may turn off the operation of the vehicle energy efficiency increasing apparatus 1 using the mainspring according to the present invention when driving downhill or driving slowly through the operation of the operation switch 110. This gives the driver more choice.

Hereinafter, referring to the accompanying drawings, the energy efficiency increasing apparatus 1 for a vehicle using the mainspring according to the present invention will be described as follows.

First, when the controller 70 detects that the current vehicle is gradually being lowered for stopping by input of signals from the first sensor 10, the third sensor 30, and the fifth sensor 100, the electric unit ( As the control signal is transmitted to the 80 and the shaft fixing unit 90, the transmission unit 80 can be rotated in the direction in which the rotating shaft 40 is wound in the spring 50 with respect to the rotation direction of the wheel shaft (7). The interlocking and the shaft fixing unit 90 releases the gripping state so that the rotating shaft 40 can be rotated. As a result, the spring 50 on the rotating shaft 40 is wound while the rotating shaft 40 is rotated. Energy is accumulated in the form of elastic energy of the mainspring 50.

When the controller 70 detects that the elastic energy of the mainspring 50 has been accumulated by the signal of the fourth sensor 60, the controller 70 transmits a control signal to the electric unit 80 and the shaft fixing unit 90. Accordingly, the transmission unit 80 releases the interlocking state of the wheel shaft 7 and the rotation shaft 40 and the shaft fixing unit 90 protects the mainspring 50 by holding the rotation shaft 40 so that it cannot be rotated.

When the controller 70 detects that the vehicle is stopped by the input of the signals of the first sensor 10, the third sensor 30, and the fifth sensor 100, the electric unit 80 and the shaft fixing unit 90. In accordance with the transmission of the control signal to the transmission unit 80 releases the interlocking state of the wheel shaft 7 and the rotary shaft 40, and the shaft fixing unit 90 gripping the rotating shaft 40 so that it can not be rotated The elastic energy of 50) is maintained until the vehicle starts or accelerates.

When the controller 70 detects that the vehicle is currently starting or accelerates at a low speed stage by input of signals from the second sensor 20, the third sensor 30, and the fifth sensor 100, By transmitting a control signal to the motor unit 80 and the shaft fixing unit 90, the motor unit 80 is interlocked so that the rotation shaft 40 can be rotated in a different direction with respect to the rotation direction of the wheel shaft (7), The shaft fixing unit 90 releases the gripping state so that the rotating shaft 40 can be rotated, and as a result, the rotating shaft 40 is reversed while the spring 50 is released by the elastic energy accumulated in the spring 50. The reverse rotational power is rotated again by the electric unit 80 in the forward direction so that the auxiliary rotational power can be provided to the wheel shaft 7.

When the controller 70 senses exhaustion of the elastic energy accumulated in the spring 50 by the signal of the fourth sensor 60, the controller 70 transmits a control signal to the electric unit 80 and the shaft fixing unit 90. The electric unit 80 releases the interlocking state of the wheel shaft 7 and the rotating shaft 40, the shaft fixing unit 90 is to hold the rotating shaft 40 again so that the rotating shaft 40 can not be rotated, As a result, the rotary shaft 40 and the mainspring 50 do not operate at all during the constant speed driving except for stopping and starting the vehicle. The signal of the fourth sensor 60 serves as a main parameter for controlling the provision of the auxiliary rotational power at the start and stop of the vehicle.

When the controller 70 detects that the current vehicle is gradually being lowered for stopping by the input of signals from the first sensor 10, the third sensor 30, and the fifth sensor 100 while the vehicle is driving, The operation will be repeated again.

Claims

A first sensor installed on the brake pedal of the vehicle and detecting whether the pressure is applied;

A second sensor installed on the accelerator pedal of the vehicle and detecting whether the pressure is applied;

A third sensor installed on a wheel shaft of the vehicle and detecting a rotation speed per unit time;

A rotating shaft rotatably installed on one side of the wheel shaft;

A spring installed on the rotating shaft and wound by the rotation of the rotating shaft during braking or deceleration of the vehicle, and rotating the rotating shaft while elastically restoring when the vehicle starts or accelerates;

A fourth sensor installed in the mainspring and detecting whether the mainspring is restored by detecting a pressure according to the operation of the mainspring;

A controller installed in the vehicle and configured to receive signals from the first sensor, the second sensor, the third sensor, and the fourth sensor to generate a control signal; And

When the vehicle is braked or decelerated according to a control signal received from the controller and is installed between the wheel shaft and the rotary shaft, the rotational force of the wheel shaft is transmitted to the rotary shaft so that elastic energy is accumulated on the mainspring and when the vehicle starts or During acceleration, the reverse rotational power of the rotary shaft by the elastic restoration of the mainspring is converted in the forward direction so that the wheel shaft and the rotary shaft are interlocked so that the auxiliary rotational power is transmitted to the wheel shaft. An energy efficiency increasing apparatus for a vehicle using a mainspring, comprising: an electric unit separating the rotating shafts from interlocking with each other.
The method according to claim 1,

An energy efficiency increasing apparatus for a vehicle using a mainspring, wherein the shaft fixing unit is installed on the rotating shaft and fixes the rotating shaft so as not to rotate according to a control signal received from the controller.
The method according to claim 2,

Is installed in the transmission of the vehicle senses the speed stage of the transmission and transmits to the controller to cause the controller to recognize whether the braking or deceleration of the vehicle through a combination with the signal of the first sensor and the signal of the second sensor A device for increasing energy efficiency of a vehicle using a mainspring further comprising a fifth sensor configured to recognize whether the vehicle is started or accelerated through a combination thereof.
The method according to claim 3,

Installed in the interior of the vehicle energy-efficient device for a vehicle using a mainspring, characterized in that it further comprises an operation switch for controlling the operation of the electric unit by transmitting a signal to the controller according to the pressure.
The method according to any one of claims 1 to 5,

Auxiliary rotational power of the rotary shaft transmitted to the wheel shaft by the electric unit is greater energy efficiency device for a vehicle using a mainspring, characterized in that greater than the rotational force of the wheel shaft.