KR20100126962A - Circuit for controlling cdc damper of continuous damping control system - Google Patents

Circuit for controlling cdc damper of continuous damping control system Download PDF

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Publication number
KR20100126962A
KR20100126962A KR1020090045418A KR20090045418A KR20100126962A KR 20100126962 A KR20100126962 A KR 20100126962A KR 1020090045418 A KR1020090045418 A KR 1020090045418A KR 20090045418 A KR20090045418 A KR 20090045418A KR 20100126962 A KR20100126962 A KR 20100126962A
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KR
South Korea
Prior art keywords
cdc damper
damping current
damping
damper
cdc
Prior art date
Application number
KR1020090045418A
Other languages
Korean (ko)
Inventor
이병상
Original Assignee
현대모비스 주식회사
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 현대모비스 주식회사 filed Critical 현대모비스 주식회사
Priority to KR1020090045418A priority Critical patent/KR20100126962A/en
Publication of KR20100126962A publication Critical patent/KR20100126962A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
    • B60G17/018—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the use of a specific signal treatment or control method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
    • B60G17/019—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the type of sensor or the arrangement thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/30—Spring/Damper and/or actuator Units
    • B60G2202/32—The spring being in series with the damper and/or actuator
    • B60G2202/322—The spring being in series with the damper and/or actuator the damper being controllable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2401/00—Indexing codes relating to the type of sensors based on the principle of their operation
    • B60G2401/26—Resistance type, e.g. as level indicator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/30—Sensors
    • B60Y2400/308—Electric sensors
    • B60Y2400/3084—Electric currents sensors

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

The present invention relates to a circuit for controlling a CDC damper by measuring both current values in a section in which a damping current is accumulated in a CDC damper and a section in which a damping current is discharged from the CDC damper in a continuous damping control system.

The CDC damper control circuit according to the present invention includes a first switching element for switching between a battery power source and one end of the CDC damper, a second switching element for switching between the other end and the ground end of the CDC damper, and the other end and the second end of the CDC damper. A first damping current detection resistor connected between the switching elements to detect a damping current accumulated in the CDC damper when the first switching element and the second switching element are turned on, and a common contact and a ground terminal of the first switching element and the CDC damper. A second damping current detection resistor coupled between the common contact point and the second damping current detection resistor to be a path of damping current discharged from the CDC damper when the first switching device and the second switching device are turned off; And a first diode which blocks the damping current accumulated in the CDC damper from flowing to the second damping current detection resistor, and is connected between the other end of the CDC damper and the battery power and discharged from the CDC damper. The current ping and a second diode to flow to battery power only.

Description

CD Damper Control Circuit of Continuous Damping Control System {circuit for controlling CDC damper of Continuous Damping Control system}

The present invention relates to a CDC damper control circuit of a continuous damping control system. More particularly, the present invention relates to a CDC damper by measuring both current values in a section in which a damping current is accumulated in the CDC damper and a section in which a damping current is discharged from the CDC damper. It relates to a circuit to control.

Vehicles currently on the market are equipped with Continuous Damping Control ("CDC") system, which can adjust steering wheel steering and wheel vibration up and down according to the vehicle's condition for driver's safety and driving convenience, EPS It is equipped with a power steering system including Electric Power Steering, Electronic Control Power Steering (ECPS), Electro-Hydraulic Power Steering (EHPS), and an Active Front Steering (AFS) system. .

This CDC system is one of the suspension systems, which independently controls the damping force of the four-wheel damper mounted on the vehicle to improve driving stability and ride comfort. The CDC system uses up / down acceleration sensors attached to the top of each wheel to measure the behavior of each wheel and control each wheel independently.

In addition, the driver may determine the steer steering behavior of the driver based on the signals of the vehicle speed sensor and the steering angle sensor to control the damper damping force of each wheel. As a result, when the vehicle travels on an irregular road surface, the vertical load on the tire ground plane is maintained at an appropriate level, and the stability of the vehicle during turning, braking, and driving is secured. In addition, by effectively blocking the irregular pressure on the road surface generated while driving the vehicle provides a comfortable ride and driving comfort for the passenger.

The damper damping force is varied according to the damping current supplied to the CDC damper. The conventional CDC damper control circuit is shown in FIG. 1.

Referring to FIG. 1, the CDC damper control circuit includes a first switching element FET1 for switching between a battery power source and one end of the CDC damper 1, and a first switching element for switching between the other end and the ground end of the CDC damper 1. A second switching element FET2, a damping current detection resistor R1 connected in series between the CDC damper 1 and the second switching element FET2, a diode D1 connected in parallel to the CDC damper 1, The amplifier 11 amplifies the damping current value measured by the damping current detection resistor R1, and the first switching element FET1 and the second switching element FET2 based on the damping current value output from the amplifier 11. The control unit 12 for controlling the.

When the control unit 12 turns on the first switching element FET1 and the second switching element FET2, a damping current is generated from the battery power supply by the first switching element FET1, the CDC damper 1, and the damping current detection resistor R1. ) And the second switching element (FET2) to the ground terminal.

At this time, a voltage drop is generated at both ends of the damping current detection resistor R1 by the flowing damping current, and the magnitude of the voltage drop is transmitted to the controller 12 through the amplifier 11.

Then, the controller 12 calculates the damper damping force of the CDC damper 1 based on the damping current value input through the amplifier 11 and reaches the range to be controlled, and then the first switching element FET1 and the second The switching element FET2 is turned off.

When the first switching element FET1 and the second switching element FET2 are turned off, current accumulated in the CDC damper 1 is returned through the diode D1. At this time, the refluxing damping current does not flow to the damping current detection resistor R1, so that the controller 12 cannot know the damping current value in the section in which the switching element is turned off. ) Can not be precisely controlled.

The present invention has been made to solve the above-described problems of the prior art, by measuring both the damping current value in the section in which the damping current is accumulated in the CDC damper and the section in which the damping current is discharged from the CDC damper to accurately measure the CDC damper Its purpose is to provide a controlling circuit.

In addition, another object of the present invention is to allow the damping current to pass through the power stage in the period where the damping current is discharged from the CDC damper to reduce the fall time of the damping current to improve the current control response characteristics CDC damper control of the continuous damping control system To provide a circuit.

The CDC damper control circuit of the continuous damping control system according to the present invention for achieving this object includes a first switching element for switching between a battery power source and one end of the CDC damper in the continuous damping control system, and the other end of the CDC damper; When the first switching device and the second switching device is turned on by having a second switching device for switching between the ground terminal and a first damping current detection resistor connected between the other end and the second switching device of the CDC damper A circuit for controlling the CDC damper by detecting a damping current accumulated in the CDC damper using a first damping current detection resistor, the circuit being connected between a common contact point of the first switching element and the CDC damper and a ground terminal. A second damping current detection resistor serving as a path of damping current discharged from the CDC damper when the first switching element and the second switching element are turned off; A first diode connected between a second damping current detection resistor and blocking a damping current accumulated in the CDC damper from flowing to the second damping current detection resistor; and connected between the other end of the CDC damper and the battery power source. And a second diode allowing the damping current discharged from the CDC damper to flow into the battery power stage.

According to the present invention, it is possible to measure the damping current value in the section in which the damping current is accumulated in the CDC damper and in the entire section in which the damping current is discharged from the CDC damper. The measured damping current value is used to precisely measure the CDC damper. Can be controlled. In addition, the fall time of the damping current is shortened in the section where the damping current is discharged from the CDC damper, thereby improving the current control response characteristic.

Hereinafter, with reference to the accompanying drawings will be described in more detail the CDC damper control circuit of the continuous damping control system according to an embodiment of the present invention.

2 is a configuration circuit diagram showing a CDC damper control circuit of the continuous damping control system according to the present invention.

The CDC damper control circuit according to the present invention includes a first switching device (FET21) for switching between a battery power source and one end of the CDC damper (1), and a second switching for switching between the other end and the ground end of the CDC damper (1). At the time of accumulation when the first switching element FET21 and the second switching element FET22 are turned on in series between the element FET22 and the other end of the CDC damper 1 and the second switching element FET22. A first damping current detection resistor R21 serving as a passage of the damping current, a first amplifier 21 for amplifying a damping current value at the time of accumulation measured by the first damping current detection resistor R21, and a CDC damper 1 A second damping current detection resistor R22 connected in series between the one end and the ground terminal of the first switching element FET21 and the second switching element FET22 to become a passage of a damping current during discharge when the first switching element FET21 and the second switching element FET22 are turned off; And one end of the second amplifier 22 for amplifying the damping current value during discharge measured by the second damping current detection resistor R22 and the CDC damper 1. The other of the first diode D21 and the CDC damper 1 connected in series between the second damping current detection resistor R22 to block the damping current from flowing to the second damping current detection resistor R22 during accumulation. Damping current value and discharge when accumulated between the second diode D22 and the first amplifier 21 and the second amplifier 22 connected between the stage and the battery power to allow the damping current to flow to the battery power stage during discharge. The control unit 23 receives the time damping current value and controls the first switching element FET21 and the second switching element FET22. The second diode D22 blocks the battery power from flowing directly to the first damping current detection resistor R21 while the first switching device FET21 and the second switching device FET22 are turned on.

The operation of the CDC damper control circuit configured as described above will be described.

When the control unit 23 turns on the first switching element FET21 and the second switching element FET22 to accumulate energy in the CDC damper 1, the damping current is accumulated when the battery switching power is stored in the first switching element FET21. And the CDC damper 1, the first damping current detection resistor R21, and the second switching element FET22 to the ground terminal. As the energy is accumulated in the CDC damper 1, the damping current value increases during the accumulation, and the accumulation damping current value is detected by the first damping current detection resistor R21 and amplified by the first amplifier R21, and then the controller It is input to (23).

The controller 23 may determine the energy accumulation degree of the CDC damper 1 through the damping current value accumulated during the input through the first amplifier R21. When energy within the control range is accumulated in the CDC damper 1, the control unit 23 turns off the first switching element FET21 and the second switching element FET22.

When the first switching element FET21 and the second switching element FET22 are turned off, the damping current is discharged from the CDC damper 1 to the second diode D22, the battery power terminal and the ground terminal, and the second damping current. Flow through the detection resistor R22 and the first diode D21. As the energy is discharged from the CDC damper 1, the damping current decreases during this discharge, and at this discharge, the damping current value is detected by the second damping current detection resistor R22 and amplified by the second amplifier R22. It is input to the control part 23.

Then, since the control unit 23 can know the energy accumulation degree of the CDC damper 1 through the damping current value at the time of discharge input through the second amplifier R22, the damper damping force of the CDC damper 1 is precisely determined. You can control it.

In addition, in the present invention, since the damping current flows through the battery power terminal, the ground terminal, the second damping current detection resistor R22, and the like, the switching element is turned off to discharge the CDC damper as shown in FIG. 3. When the fall time of the damping current is shortened, thereby improving the damping control response characteristics.

1 is a configuration circuit diagram showing a conventional CDC damper control circuit;

2 is a circuit diagram of a CDC damper control circuit of the continuous damping control system according to the present invention;

3 is a graph showing the damper current of the CDC damper according to the turning on / off of the switching element.

      BRIEF DESCRIPTION OF THE DRAWINGS FIG.

1: CDC damper D21, D22: Diode

21: first amplifier 22: second amplifier

23 control unit FET1, FET2: switching element

R21, R22: damping current detection resistor

Claims (3)

In the continuous damping control system, a first switching device for switching between a battery power source and one end of the CDC damper, a second switching device for switching between the other end and the ground end of the CDC damper, the other end and the second end of the CDC damper A damping current accumulated in the CDC damper when the first switching element and the second switching element are turned on by detecting a first damping current detection resistor connected between the switching elements, and detecting the damping current by using the first damping current detection resistor. In the circuit for controlling the CDC damper, A second damping current connected between a common contact of the first switching element and the CDC damper and a ground terminal to become a path of a damping current discharged from the CDC damper when the first switching element and the second switching element are turned off; Detection resistance, A first diode connected between the common contact point and the second damping current detection resistor to block a damping current accumulated in the CDC damper from flowing to the second damping current detection resistor; And a second diode connected between the other end of the CDC damper and the battery power source to allow a damping current discharged from the CDC damper to flow into the battery power source. 2. The CDC damper control circuit of claim 1, further comprising an amplifier for amplifying a damping current value discharged from the CDC damper measured at the second damping current detection resistance. 2. The method of claim 1, wherein the damping current value accumulated in the CDC damper measured by the first damping current detection resistance and the damping current value discharged from the CDC damper measured by the second damping current detection resistance are used. A CDC damper control circuit of a continuous damping control system, characterized by controlling a first switching element and a second switching element.
KR1020090045418A 2009-05-25 2009-05-25 Circuit for controlling cdc damper of continuous damping control system KR20100126962A (en)

Priority Applications (1)

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KR1020090045418A KR20100126962A (en) 2009-05-25 2009-05-25 Circuit for controlling cdc damper of continuous damping control system

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Application Number Priority Date Filing Date Title
KR1020090045418A KR20100126962A (en) 2009-05-25 2009-05-25 Circuit for controlling cdc damper of continuous damping control system

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190004948A (en) * 2017-07-05 2019-01-15 현대모비스 주식회사 Apparatus for controlling damper of continuous damping control system
KR20190037563A (en) * 2017-09-29 2019-04-08 현대모비스 주식회사 Apparatus for controlling of solenoid valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190004948A (en) * 2017-07-05 2019-01-15 현대모비스 주식회사 Apparatus for controlling damper of continuous damping control system
KR20190037563A (en) * 2017-09-29 2019-04-08 현대모비스 주식회사 Apparatus for controlling of solenoid valve

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