KR101795389B1 - Device for controlling alternator and method for controlling using the same - Google Patents

Device for controlling alternator and method for controlling using the same Download PDF

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Publication number
KR101795389B1
KR101795389B1 KR1020150175360A KR20150175360A KR101795389B1 KR 101795389 B1 KR101795389 B1 KR 101795389B1 KR 1020150175360 A KR1020150175360 A KR 1020150175360A KR 20150175360 A KR20150175360 A KR 20150175360A KR 101795389 B1 KR101795389 B1 KR 101795389B1
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South Korea
Prior art keywords
rotational speed
crankshaft
alternator
wave current
controlling
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KR1020150175360A
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Korean (ko)
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KR20170068314A (en
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정병환
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현대자동차 주식회사
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/10—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
    • H02P9/105—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load for increasing the stability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • B60R16/0307—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for using generators driven by a machine different from the vehicle motor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/006—Means for protecting the generator by using control
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/48—Arrangements for obtaining a constant output value at varying speed of the generator, e.g. on vehicle

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

A method of controlling an alternator according to the present invention includes the steps of detecting a rotational speed of a crankshaft of an engine, detecting a rotational speed of a pulley of an alternator, Calculating a slip ratio using the rotation speed of the crankshaft and the rotation speed of the pulley, and controlling a square wave current applied to the alternator using the calculated slip ratio.

Description

TECHNICAL FIELD [0001] The present invention relates to an alternator control apparatus and an alternator control method using the same,

The present invention relates to an alternator control apparatus and an alternator control method using the same.

In the internal combustion engine, the rotational motion of the crankshaft includes a certain amount of rotational variation. The momentary rotational fluctuation of the crankshaft causes a slip phenomenon of the belt due to instantaneous driving resistance in the engine front pulley of the engine FEAD (Front End Accessory Drive) belt or the pulley type belt system.

Such slippage of the pulleys and belts causes the slip noise of the take-off belt and wear of the take-off belt and causes the span vibration of the FEAD belt due to the periodical tensile compressive excitation force in the belt length direction.

The alternator in the see-through type belt system is composed of a rotor having a large inertia force and a small pulley, which generates a larger drive resistance than the other pulleys for the instantaneous rotation fluctuation of the crankshaft .

Therefore, in the pulley of the alternator, a rotational fluctuation component larger than the rotational fluctuation component of the crankshaft of the engine is generated, and the belt slippage phenomenon is most difficult to occur.

The matters described in the background section are intended to enhance the understanding of the background of the invention and may include matters not previously known to those skilled in the art.

An alternator control device capable of controlling a square wave current applied to a stator of an alternator and an alternator control method using the same are provided.

A method of controlling an alternator according to the present invention is a method for controlling a square wave current applied to a stator winding of an alternator, comprising the steps of: detecting a rotational speed of a crankshaft of an engine; detecting a rotational speed of an alternator pulley; Calculating a slip ratio using the rotation speed of the crankshaft and the rotation speed of the pulley, and controlling the square-wave current applied to the stator winding of the alternator using the calculated slip ratio.

The step of calculating the slip ratio may include separating the rotational speed variation amount at the rotational speed of the crankshaft and separating the rotational speed variation amount at the rotational speed of the pulley.

The calculating of the slip ratio may calculate the slip ratio by dividing a value obtained by subtracting the rotational speed variation amount of the pulley from the rotational speed variation amount of the crankshaft by the rotational speed variation amount of the crankshaft.

The step of controlling the square wave current may include adjusting the amplitude of the square wave current by comparing the calculated slip rate with a reference slip rate.

The step of adjusting the amplitude may include calculating a ratio of a period in which the calculated slip rate exceeds the reference slip rate and a period in which the calculated slip rate satisfies the reference slip rate, And adjusting the magnitude of the square wave current.

The step of controlling the rectangular wave current may include the step of controlling the phase of the rectangular wave current using the rotation period of the crankshaft.

Wherein the step of controlling the phase comprises the step of controlling the phase of the crankshaft such that the square wave current has a positive value in a period in which the fluctuation amount of the rotational speed of the crankshaft increases and the square wave current has a negative value in a period in which the fluctuation amount of the rotational speed of the crankshaft decreases And controlling the mobile terminal to have the mobile terminal.

The alternator control device according to the present invention includes a detector for detecting a rotational speed fluctuation amount of a crankshaft of an engine and detecting an amount of rotational speed variation of a pulley to which an alternator is connected, And a controller for controlling the rectangular wave current applied to the alternator using the slip ratio.

The calculation unit may calculate the slip ratio by dividing a value obtained by subtracting a rotational speed variation amount of the pulley from a rotational speed variation amount of the crankshaft by a rotational speed variation amount of the crankshaft.

The controller may include an amplitude adjuster for adjusting the amplitude of the rectangular wave current by comparing the slip rate with a reference slip rate.

Wherein the amplitude controller calculates a ratio of a period in which the calculated slip rate exceeds the reference slip rate and a period in which the calculated slip rate satisfies the reference slip rate, Can be adjusted.

The control unit may include a phase control unit for controlling the phase of the rectangular wave current by using the rotational speed variation amount of the crankshaft.

Wherein the phase control unit performs control so that the rectangular wave current has a positive value in a period in which the variation amount of the rotational speed of the crankshaft increases and the rectangular wave current has a negative value in a period in which the variation amount of the rotational speed of the crankshaft is reduced .

According to the present invention, the slip ratio is calculated using the rotational speed fluctuation amount of the engine and the alternator, and the amplitude magnitude of the square wave current is adjusted using the calculated slip ratio to change the rotating speed fluctuation amount of the alternator to the rotational speed fluctuation amount of the crankshaft To eliminate the alternating load applied to the take-off belt, and to provide an environment that can improve the slip and wear phenomenon between the alternator pulley and the take-off belt.

FIG. 1 is a view schematically illustrating a structure of an alternator control system including an alternator control apparatus according to an embodiment of the present invention. Referring to FIG.
2 is a flowchart briefly illustrating a process of controlling a square wave current applied to a stator of an alternator according to an embodiment of the present invention.
FIG. 3 is a graph illustrating a section that meets and exceeds a reference slip rate according to an embodiment of the present invention.
4 is a diagram illustrating a period of a square wave according to an amount of rotation speed variation of an engine according to an embodiment of the present invention.
5 is a flowchart specifically illustrating a process of controlling a square wave current according to an embodiment of the present invention.
6 is a graph showing the rotational speed variation and the slip ratio before controlling the square wave current of the alternator.
FIG. 7 is a view showing the rotational speed variation amount and the slip ratio after controlling the square wave current of the alternator according to one embodiment of the present invention. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

Like numbers refer to like elements throughout the specification.

As used herein, the terms "vehicle", "car", "vehicle", "automobile", or other similar terms are intended to encompass various types of vehicles, including sports utility vehicles (SUVs), buses, Including automobiles, including ships, aircraft, and the like, including boats and ships, and may be used in hybrid vehicles, electric vehicles, plug-in hybrid electric vehicles, hydrogen fuel vehicles and other alternative fuels Fuel) vehicles.

Additionally, some methods may be executed by at least one controller. The term controller refers to a hardware device comprising a memory and a processor adapted to execute one or more steps that are interpreted as an algorithmic structure. The memory is adapted to store algorithm steps and the processor is adapted to perform the algorithm steps specifically to perform one or more processes described below.

Further, the control logic of the present invention may be embodied in a non-volatile, readable medium on a computer readable medium, including executable program instructions, executed by a processor, controller, or the like. Examples of computer-readable means include, but are not limited to, ROM, RAM, CD-ROM, magnetic tape, floppy disk, flash drive, smart card and optical data storage. The computer readable medium can be distributed to networked computer systems and stored and executed in a distributed manner, for example, by a telematics server or a CAN (Controller Area Network).

Now, an alternator control apparatus according to an embodiment of the present invention and an alternator control method using the same will be described in detail with reference to FIGS. 1 to 7. FIG.

FIG. 1 is a view schematically illustrating a structure of an alternator control system including an alternator control apparatus according to an embodiment of the present invention. Referring to FIG. At this time, the alternator control device only shows the schematic configuration necessary for the explanation according to the embodiment of the present invention, and is not limited to this configuration.

Referring to FIG. 1, an alternator control system according to an embodiment of the present invention includes an engine 10, an alternator 30, a battery 40, and an alternator control device 100.

The alternator 30 is connected to the engine 10 via the take-a-way belt 20 and the pulley 32. The alternator 30 generates electric power required by the vehicle using the rotational force of the crankshaft 12 of the engine 10, and supplies the electric power to the vehicle.

The alternator control apparatus 100 according to an embodiment of the present invention stores the electric energy generated by the alternator 30 in the battery 40 of the vehicle and receives electric power from the battery 40, .

According to an embodiment of the present invention, the alternator 30 includes a hybrid starter and generator (HSG) of a hybrid vehicle. The battery 40 is electrically connected to the MHSG 40, and a voltage for driving the HSG is stored. The battery 40 supplies a driving voltage to the HSG when assisting the output of the engine 20 and a voltage generated in the MHSG during regenerative braking. And, in the embodiment of the present invention, the battery 40 may be a 48V battery.

The alternator control device 100 controls the rotational speed and rotational speed variation of the crankshaft 12 of the engine 10, the rotational speed of the pulley 32 connected to the rotor of the alternator 30 and the rotor shaft, To control the magnitude of the amplitude of the square wave current to be applied to the stator (not shown) of the alternator 30. The alternator control apparatus 100 according to the embodiment of the present invention applies a current directly to the stator and applies the current to the stator through the stator. The amplitude magnitude of the applied square wave current can be controlled.

Here, the rotational speed fluctuation amount of the crankshaft 12 includes a rotational fluctuation component in accordance with the rotational vibration of the crankshaft 12. [ In the four-cylinder engine, rotational vibration of two cycles per one rotation of the crankshaft 12 is generated.

The rotational speed fluctuation amount of the pulley 32 includes a rotational fluctuation component in the pulley 32 to which the alternator 30 generated by the rotational vibration of the crankshaft 12 is connected. The rotational vibration in the pulley 32 is generated by amplifying the pulley ratio by an amount greater than the amplitude of the rotational vibration in the crankshaft 12. [ The alternator control apparatus 100 applies square-wave currents of two periods to a stator (not shown) of the alternator 30 while the crankshaft 12 makes one rotation.

The alternator control apparatus 100 according to an embodiment of the present invention includes a detection unit 110, a calculation unit 120, and a control unit 130.

The detection unit 110 detects the rotational speed and the rotational speed variation of the crankshaft 12 of the engine 10. [ The detection unit 110 detects the rotational speed and rotational speed variation of the pulley 32 and transmits the detected data to the calculation unit 120. [

The calculation unit 120 calculates the slip ratio using the fluctuation amount of the rotational speed of the crankshaft 12 and the fluctuation amount of the rotational speed of the pulley 32. [

The calculation section 120 divides the value obtained by subtracting the rotational speed variation amount of the pulley 32 from the rotational speed variation amount of the crankshaft 12 by the rotational speed variation amount of the crankshaft 12, Calculate the rate.

Figure 112015120764909-pat00001

The control unit 130 controls the square wave current applied to the stator of the alternator 30 using the slip ratio. The controller 130 controls the magnitude of the amplitude of the square wave current using the slip ratio and controls the top dead center (TDP) phase of the engine piston to match the phase of the square wave current.

The controller 130 includes an amplitude controller 132 and a phase controller 134 according to an embodiment of the present invention.

The amplitude adjuster 132 adjusts the amplitude of the square wave current by comparing the slip rate calculated by the calculator 120 with a predetermined reference slip rate.

The amplitude adjuster 132 calculates a ratio of a period in which the calculated slip rate exceeds the reference slip rate and a period in which the calculated slip rate satisfies the reference slip rate, Adjust the size of the square wave current.

The phase control unit 134 controls the phase of the square wave current using the top dead center of the engine.

The phase control unit 134 determines that the rectangular wave current has a positive value in a period in which the rotational speed fluctuation amount of the crankshaft 12 increases and the rectangular wave current is negative in a period in which the rotational speed fluctuation amount of the crankshaft 12 decreases. .

As described above, the alternator control apparatus 100 according to an embodiment of the present invention can control the alternator 30 such that the phase of the square wave current matches the phase of the top dead center of the engine piston and the alternator 30 slip rate Can be controlled to maintain this target level (for example, 2% or less).

For this purpose, the alternator control apparatus 100 may be implemented with one or more processors operating according to a set program, and the set program may be one programmed to perform each step of the alternator control method according to an embodiment of the present invention .

2 is a flowchart briefly illustrating a process of controlling a square wave current applied to a stator of an alternator according to an embodiment of the present invention. The following flowchart will be described using the same reference numerals in conjunction with the configuration of Fig.

2, an alternator control apparatus 100 according to an embodiment of the present invention detects a rotation speed variation amount of a crankshaft 12 and a rotation speed variation amount of a pulley 32 or a rotor (not shown) S102).

The alternator control apparatus 100 according to an embodiment of the present invention calculates the slip ratio in the pulley 32 within one rotation cycle of the crankshaft 12 (S104).

The alternator control apparatus 100 according to an embodiment of the present invention sets an amplitude magnitude of a square wave current to be applied to the alternator 30 using the slip ratio (S106).

Here, the alternator control device 100 calculates the ratio of the interval in which the slip ratio exceeds the predetermined reference slip ratio and the interval in which the calculated slip rate satisfies the reference slip ratio, and calculates the ratio using the calculated ratio The magnitude of the square wave current can be adjusted.

FIG. 3 is a graph illustrating a section that meets and exceeds a reference slip rate according to an embodiment of the present invention.

Referring to FIG. 3, the slip ratio calculated in the present invention includes a dynamic slip that is dynamically changed with time by rotation of the crankshaft and the pulley. Then, the slip rate is generated in the form of a sinusoidal wave.

The slip ratio formed by the sinusoidal wave is greater than a reference slip ratio (for example, -0.5 to +0.5) that satisfies a reference slip ratio which is a predetermined slip limit value (+, - Small, or greater than +0.5).

The alternator control apparatus 100 according to an embodiment of the present invention calculates the ratio of the interval that satisfies the reference slip ratio to the interval that exceeds the reference slip ratio and determines the size of the square wave current using the calculated ratio.

For example, when the interval exceeding the reference slip rate is larger than the interval satisfying the reference slip rate, the amplitude of the square-wave current is controlled to be increased. In addition, when the interval satisfying the reference slip ratio is larger than the interval exceeding the reference slip ratio, the amplitude of the square-wave current can be controlled to be reduced.

The alternator control apparatus 100 according to an embodiment of the present invention sets the period of the square wave current using the rotation angle of the crankshaft 12 (S108).

4 is a diagram illustrating a period of a square wave according to an amount of rotation speed variation of an engine according to an embodiment of the present invention.

 As shown in FIG. 4, the alternator control apparatus 100 according to an embodiment of the present invention determines a phase of a rectangular wave current by using a top dead center (TDP) according to a rotational speed variation amount of the engine.

The alternator control apparatus 100 according to an embodiment of the present invention generates a square wave current by using the amplitude magnitude and the phase and applies the generated square wave current to the stator of the alternator 30, (S110).

5 is a flowchart specifically illustrating a process of controlling a square wave current according to an embodiment of the present invention. The following flowchart will be described using the same reference numerals in conjunction with the configuration of Fig.

2, the alternator control apparatus 100 according to an embodiment of the present invention detects the rotational speed of the crankshaft 12 and detects the rotational speed of the crankshaft 12 and the rotational speed of the rotor (not shown) of the alternator 30 or the pulley 32 The rotation speed is detected (S202, S204).

The alternator control apparatus 100 according to an embodiment of the present invention separates the respective rotational speed fluctuation amounts at the rotational speeds of the crankshaft 12 and the pulley 32 and calculates the slip ratio using the separated rotational speed fluctuation amounts (S206, S208).

The alternator control apparatus 100 according to an embodiment of the present invention compares the calculated slip ratio with a preset reference slip ratio and calculates a ratio of a section that satisfies the reference slip ratio to an exceeding section (S210, S216).

Further, the alternator control apparatus 100 according to an embodiment of the present invention determines the amplitude magnitude of the square wave current using the calculated ratio (S218).

Here, in the alternator control apparatus 100 according to an embodiment of the present invention, in a period in which the speed of the crankshaft 12 increases, a square wave current has a positive value and in a period in which the speed of the crankshaft 12 increases Is set to have a negative value (S220, S226).

The alternator control apparatus 100 according to an embodiment of the present invention generates a square wave current using the amplitude magnitude and controls the generated alternating current to be applied to the alternator 30 (S228).

FIG. 6 is a graph showing the rotational speed variation and the slip ratio before controlling the square-wave current of the alternator, and FIG. 7 is a graph showing the relationship between the rotational speed variation and the slip ratio after controlling the square wave current of the alternator according to an embodiment of the present invention Fig.

Referring to FIG. 6, conventionally, the rotational speed fluctuation amount of the alternator vibrates with a difference in the rotational speed variation of the crankshaft and the pulley ratio.

However, the alternator control apparatus 100 according to the embodiment of the present invention controls the amplitude of the rectangular wave current so that the rotation speed variation amount of the alternator coincides with the rotation speed variation amount of the crankshaft, It is possible to improve the slip of the generated take-off belt.

Therefore, the alternator control apparatus according to an embodiment of the present invention calculates the slip ratio using the fluctuation amount of rotation speed of the engine and the alternator, adjusts the amplitude magnitude of the square-wave current using the calculated slip ratio, The variation amount is made to coincide with the rotational speed fluctuation amount of the crankshaft, the alternating load applied to the swivel type belt is removed, and the slippage and the wear phenomenon between the alternator pulley and the swivel type belt can be improved.

The embodiments of the present invention described above are not implemented only by the apparatus and method, but may be implemented through a program for realizing the function corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded. Such a recording medium can be executed not only on a server but also on a user terminal.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (13)

In the method in which the alternator control device controls the square-wave current applied to the stator winding of the alternator,
Detecting the rotational speed of the crankshaft of the engine,
Detecting the rotational speed of the pulley of the alternator,
Calculating a slip ratio using the rotational speed of the crankshaft and the rotational speed of the pulley, and
And controlling a square wave current applied to the stator winding of the alternator using the calculated slip ratio,
Wherein the step of controlling the square-
And adjusting the amplitude of the square wave current by comparing the calculated slip rate with a reference slip rate. The method of claim 1,
Wherein the calculating the slip rate comprises:
Separating the rotational speed fluctuation amount from the rotational speed of the crankshaft, and
Separating the rotational speed fluctuation amount from the rotational speed of the pulley
≪ / RTI > 3. The method of claim 2,
Wherein the calculating the slip rate comprises:
Wherein the slip ratio is calculated by dividing a value obtained by subtracting a rotational speed variation amount of the pulley from a rotational speed variation amount of the crankshaft by a rotational speed variation amount of the crankshaft. delete The method of claim 1,
Wherein adjusting the amplitude comprises:
Calculating a ratio of a period in which the calculated slip rate exceeds the reference slip rate and a period in which the calculated slip rate satisfies the reference slip rate, and
Adjusting the size of the square wave current using the ratio
≪ / RTI > 4. The method of claim 3,
Wherein the step of controlling the square-
Controlling the phase of the square wave current using the rotation period of the crankshaft
≪ / RTI > The method of claim 6,
Wherein the step of controlling the phase comprises:
Controlling the rectangular wave current to have a negative value in a section in which the rectangular wave current has a positive value in a period in which the variation rate of the rotation speed of the crankshaft increases and a variation rate of the rotation speed of the crankshaft is decreased
≪ / RTI > A detector for detecting a rotational speed fluctuation amount of the crankshaft of the engine and detecting a rotational speed fluctuation amount of the pulley to which the alternator is connected,
A calculation unit for calculating a slip ratio using the fluctuation amount of the rotational speed of the crankshaft and the fluctuation amount of the rotational speed of the pulley,
And a controller for controlling the rectangular wave current applied to the alternator using the slip ratio,
Wherein,
And an amplitude adjusting unit for adjusting the amplitude of the rectangular wave current by comparing the slip ratio with a reference slip ratio. 9. The method of claim 8,
The calculation unit may calculate,
Wherein the slip ratio is calculated by dividing a value obtained by subtracting a rotational speed variation amount of the pulley from a rotational speed variation amount of the crankshaft by a rotational speed variation amount of the crankshaft. delete 9. The method of claim 8,
Wherein the amplitude controller comprises:
Calculating a ratio of a period in which the calculated slip rate exceeds the reference slip rate and a period in which the calculated slip rate satisfies the reference slip rate, and adjusting a size of the rectangular wave current using the calculated ratio Alternator control device. 9. The method of claim 8,
Wherein,
And a phase control unit for controlling the phase of the rectangular wave current by using a rotational speed variation amount of the crankshaft,
And an alternator control device. The method of claim 12,
Wherein the phase control unit comprises:
Wherein the control unit controls the rectangular wave current to have a negative value in a period in which the rectangular wave current has a positive value in a period in which the variation rate of the rotation speed of the crankshaft increases and a variation rate of the rotation speed of the crankshaft decreases.
KR1020150175360A 2015-12-09 2015-12-09 Device for controlling alternator and method for controlling using the same KR101795389B1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005057987A (en) * 2003-08-06 2005-03-03 General Motors Corp <Gm> Method for reducing noise of engine belt
JP2013180681A (en) * 2012-03-02 2013-09-12 Toyota Industries Corp Control device of generator-motor mounted to vehicle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005057987A (en) * 2003-08-06 2005-03-03 General Motors Corp <Gm> Method for reducing noise of engine belt
JP2013180681A (en) * 2012-03-02 2013-09-12 Toyota Industries Corp Control device of generator-motor mounted to vehicle

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