KR20140036903A - Apparatus for stabilizing power supply of air suspension controlling actuator - Google Patents
Apparatus for stabilizing power supply of air suspension controlling actuator Download PDFInfo
- Publication number
- KR20140036903A KR20140036903A KR1020120103604A KR20120103604A KR20140036903A KR 20140036903 A KR20140036903 A KR 20140036903A KR 1020120103604 A KR1020120103604 A KR 1020120103604A KR 20120103604 A KR20120103604 A KR 20120103604A KR 20140036903 A KR20140036903 A KR 20140036903A
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- KR
- South Korea
- Prior art keywords
- relay
- power supply
- terminal
- switching
- actuator
- Prior art date
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Classifications
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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
- B60G17/0185—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 for failure detection
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/10—Type of spring
- B60G2202/15—Fluid spring
- B60G2202/152—Pneumatic spring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
- B60G2800/80—Detection or control after a system or component failure
- B60G2800/802—Diagnostics
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2306/00—Other features of vehicle sub-units
- B60Y2306/15—Failure diagnostics
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The present invention makes it possible to diagnose a failure caused by a ground (GND) short circuit at the terminal side supplying power to an air suspension control actuator of a vehicle, and cut off the power supply when a ground (GND) short circuit failure is detected to provide an associated device. Provides a power supply stabilization device for actuators for air suspension control to prevent burnout
To this end, the present invention is a relay switch for switching the state of supplying power supplied from a battery power terminal to the high-side (HS) power supply terminal of the actuator valve for controlling the vehicle air suspension, and the actuator And a power stabilization module operable to sense a failure caused by a ground (GND) short circuit at the valve high-side (HS) side to cut off the power supply.
Description
The present invention relates to a power supply stabilization device of the actuator for air suspension control, and more particularly, the power supply terminal of the actuator for controlling the power supply to the air spring pneumatic control solenoid valve of the vehicle axle is ground (GND). The present invention relates to a power supply stabilization device for an air suspension control actuator which enables diagnosis of a failure in the case of a short circuit and prevents burnout of the fuse inside the actuator control ECU and the ECU power supply.
In general, the actuator mounted on the four axes of the vehicle (Front Left, Front Right, Rear Left, Rear Right), the air spring valve for controlling the air pressure of the air spring (Air-Spring), and stores the high pressure compressed air A reservoir valve for controlling the pneumatic pressure of the reservoir tank and an exhaust valve for discharging the compressed air inside the vehicle pneumatic circuit to the outside are provided.
Each of these actuator valves is composed of a solenoid valve that is closed while no current flows and opens only when current flows, and the air-suspension ECU controls the opening and closing of each actuator valve. have.
On the other hand, the high side (HS) power of each actuator valve is designed to be always supplied while the ignition of the vehicle is on without the air suspension system malfunctioning. The presence / absence of supply is designed to be controlled via a relay switch installed in the ECU. In addition, the actuator valves may be controlled through on / off control of switching elements configured on the low side (LS) side of each valve.
1 is a view showing a configuration of a power supply circuit of an actuator valve by a control of a conventional air suspension ECU.
As shown in FIG. 1, in the air suspension ECU, the actuator valve HS terminal is a terminal for supplying power to the respective actuator valves, even though the fuse of the ECU or the ECU power supply is burned out when the ground (GND) is shorted. As with the battery power supply terminal B (+) of the vehicle, no failure is detected in the ground GND short circuit. This is because the power supply circuit is composed of only the
In addition, when a ground (GND) short circuit occurs on the low-side (LS) terminal side of the actuator valve through the control of the
Related technologies include Korean Patent Publication No. 2000-0006511 (Suspension Control Device) (2000.01.25).
However, in the case of a power supply circuit of an actuator valve under the control of a conventional air suspension ECU, when a ground (GND) short occurs in the actuator valve high-side (HS) terminal, a diagnosis function for such a short circuit occurrence and The stabilization function is not considered, and if the ground (GND) short circuit occurs while the actuator valve is in operation, the momentary overcurrent may cause the fuse in the ECU or the ECU power supply to burn out and extend to the secondary failure. I have a problem.
Accordingly, the present invention has been made to improve the above-mentioned conventional problems, and it is possible to diagnose a failure due to a ground (GND) short circuit at the terminal side supplying power to the air suspension control actuator of the vehicle, and ground (GND). SUMMARY OF THE INVENTION An object of the present invention is to provide a power supply stabilization device for an actuator for controlling air suspension, which prevents burnout of an associated device by cutting off the power supply when a short circuit failure is detected.
According to an aspect of the present invention, a power supply stabilization device for an air suspension control actuator includes a power supply from a battery power supply terminal to a high-side (HS) power supply terminal of an actuator valve for controlling a vehicle air suspension. A relay switch for switching and controlling a supplying state, and a power stabilization module configured to sense a failure caused by a ground (GND) short circuit at the actuator valve high-side (HS) side and to shut off the power supply. It is characterized by.
In the present invention, the power stabilization module, the relay switching control unit for sensing the over-current by the ground (GND) short-circuit of the actuator valve high-side (HS) power supply terminal, and switching off the relay switch, and the relay A failure prevention unit for maintaining the switched-off state according to ground (GND) short-circuit sensing of the switching control unit, so that the relay switch is not chattered when it is returned to the normal state by short-term maintenance of the failure state; And a fault protection unit for preventing a relay protection unit and a safety monitoring signal for monitoring a ground (GND) short-circuit failure state of the actuator valve high-side (HS) power supply terminal.
In addition, the relay switching controller is connected in series between the switching-on connection terminal of the relay switch and the actuator valve high-side (HS) power supply terminal, the sensing resistor for sensing the overcurrent generated by the ground (GND) short circuit And a control diode having an output terminal connected in parallel between the sensing resistor and a connection terminal of an actuator valve high-side (HS) power supply terminal and an input terminal connected to one end of a relay coil of the relay switch. .
The failure prevention unit inputs a switching transistor in which a base end is connected in parallel between the control diode of the relay switching controller, an emitter end is connected to a relay driving transistor, and a relay control signal from the ECU to the base end. And the collector stage includes a relay driving transistor connected to the emitter stage of the switching transistor.
In one embodiment of the present invention, the relay protection unit includes a first protection transistor having a base end connected in parallel with an emitter end of the relay driving transistor of the failure prevention unit, and a collector end connected to the other end of the relay coil of the relay switch, and the base end being The second protective transistor may be connected in parallel with the emitter terminal of the first protective transistor, and the collector terminal may be connected in parallel with the base terminal of the first protective transistor.
The fault monitoring unit may include a monitoring transistor having a base end connected in parallel between a switching transistor of the fault protection unit and a connection terminal of a relay driving transistor, and a collector end connected in parallel with an output end of a safety monitoring signal, and the safety monitoring signal. It characterized in that it comprises a resistor connected in parallel with the output terminal of.
According to the present invention made as described above, by detecting a state that a fault of the ground (GND) short circuit occurs in the actuator valve high-side (HS) power supply terminal by the relay switch control of the air suspension ECU, By automatically shutting off the supply, it is possible to prevent the internal fuse of the ECU and the fuse of the ECU power supply from being burned out due to the ground (GND) short circuit, and to provide a diagnosis function through monitoring of the failure. It can improve the safety of parts and the convenience of maintenance.
1 is a view showing a configuration of a power supply circuit of an actuator valve by a control of a conventional air suspension ECU.
2 is a view showing the configuration of the power supply stabilization device of the air suspension control actuator according to an embodiment of the present invention.
Hereinafter, the present invention configured as described above will be described in detail with reference to the accompanying drawings.
In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.
2 is a view showing the configuration of the power supply stabilization device of the air suspension control actuator according to an embodiment of the present invention.
As shown in Figure 2, the power supply stabilization device of the air suspension control actuator according to the present invention, the battery power supplied from the battery power supply terminal (B (+)) to the various actuator valves for controlling the vehicle air suspension (that is, , A
The
Here, the relay control high-side (HS) output terminal of the
The
On the other hand, the relay
According to the
In addition, the control diode D4 is turned on when a potential difference of more than a turn-on voltage of the diode occurs at both ends thereof, and a current flows. The current path is formed through the control diode (D4) at a moment greater than the turn-on voltage of the power supply, so that current is applied to the
In this case, the sensing resistor R4 should select a very low resistance value, for example, 0.01 mA to 0.1 mA in order to minimize the voltage drop of the power supplied to the actuator valve. Choose a resistor that can withstand more than 10W of power.
In addition, the control diode D4 is a turn-on voltage equal to the voltage difference across the sensing resistor R4 for detecting an overcurrent, for example, connecting a single diode having a turn-on voltage of 0.6 V, or a plurality of the diodes in accordance with the turn-on voltage value. Diodes are connected in series.
On the other hand, since the maximum power consumption of the air suspension ECU applied to the present invention is less than 15A (based on the KH application model), if the threshold value of the overcurrent detection is configured to 15A, for control having a turn-on voltage of 0.6V Assuming that the diode D4 is used, the resistance value Rs of the sensing resistor D4 and the power value P_rs capable of withstanding the instantaneous overcurrent are applied according to the following equation (1).
According to
That is, when a ground (GND) short circuit occurs in the actuator valve high-side (HS) power supply terminal, the fuse inside the ECU or the ECU power supply may be permanently damaged due to a short circuit with the high-side (HS) power line. The instantaneous overcurrent flows due to the extremely low resistance between the ground (GND) lines. In this case, the fuse or the fuse placed in the input power part of the ECU is burned out due to the failure of the device or PCB pattern located on the power line inside the ECU. The moment it enters the circuit, the over current cuts off instead of the ECU.
Therefore, to prevent this, the sensing resistor (R4) and the control diode can be used to protect the ECU internal element and PCB pattern from momentary overcurrent during a ground (GND) short circuit of the actuator valve high-side (HS) power supply terminals. (D4) was prepared.
In addition, in the
The
The
Next, the operation of the power supply stabilization device of the air suspension control actuator according to the present invention made as described above will be described in detail with reference to the accompanying drawings.
First, when the
When the voltage value across both ends is increased by the fixed resistance value of the sensing resistor R4, the control diode D4 is equal to or greater than the turn-on voltage of the diode at both ends thereof. When a potential difference occurs, it is turned on and current flows.
At this time, when the potential difference across the sensing resistor R4 becomes greater than the turn-on voltage of the control diode D4, a current path is formed through the control diode D4, and thus the relay control high-side HS. As the application of the current to the
On the other hand, when the current path through the control diode (D4) is formed, the switching
In addition, the monitoring
In addition, the
Therefore, when the ground (GND) short circuit failure of the actuator valve high-side (HS) power supply terminal is detected, the
In addition, in the failure state, even if the MCU generates a relay control signal to turn on the power output, the
While the present invention has been particularly shown and described with reference to exemplary 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 invention as defined by the appended claims. I will understand. Accordingly, the technical scope of the present invention should be defined by the following claims.
10: relay switch 20: relay switching control unit
30: Failure prevention part 40: Relay protection part
50: failure monitoring unit 100: power stabilization module
R4: sensing resistor D4: control diode
Claims (6)
And a power stabilization module operable to sense a failure due to a ground (GND) short circuit at the actuator valve high-side (HS) side to cut off the power supply of the air suspension control actuator. Stabilization device.
The power stabilization module may include: a relay switching controller configured to sense an overcurrent caused by a ground (GND) short circuit of the actuator valve high-side (HS) power supply terminal and to switch off the relay switch;
Failure prevention unit for maintaining the state that the relay switch is switched off in accordance with the ground (GND) short circuit fault sensing of the relay switching control unit,
A relay protection unit which prevents the relay switch from being chattered when returning to a normal state by maintaining the fault state for a short time;
And a failure monitoring unit generating a safety monitoring signal for monitoring a ground (GND) short-circuit failure state of the actuator valve high-side (HS) power supply terminal.
The relay switching controller may include a sensing resistor connected in series between the switching on connection terminal of the relay switch and the actuator valve high-side (HS) power supply terminal to sense an overcurrent generated by a ground (GND) short circuit; An air suspension comprising an output terminal connected in parallel between the sensing resistor and a connection terminal of an actuator valve high-side (HS) power supply terminal and an input terminal connected to one end of a relay coil of the relay switch. Power supply stabilization device for control actuator.
The failure prevention unit receives a relay control signal from the ECU, a switching transistor having a base end connected in parallel with the control diode of the relay switching control unit, an emitter end connected to a relay driving transistor, and a base end, A power supply stabilization device for an air suspension control actuator, characterized in that the collector stage includes a relay driving transistor connected to the emitter stage of the switching transistor.
The relay protection unit may include a first protection transistor having a base end connected in parallel with an emitter end of a relay driving transistor of the failure protection unit, and a collector end connected to the other end of a relay coil of the relay switch, and the base end being used for the first protection. And a second protective transistor connected in parallel with the emitter terminal of the transistor, the collector terminal being connected in parallel with the base terminal of the first protective transistor.
The fault monitoring unit includes a monitoring transistor having a base end connected in parallel between a switching transistor of the fault protection unit and a connection terminal of a relay driving transistor, and a collector end connected in parallel with an output end of a safety monitoring signal, and an output end of the safety monitoring signal. And a resistor connected in parallel with the power supply stabilization device for an air suspension control actuator.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020120103604A KR20140036903A (en) | 2012-09-18 | 2012-09-18 | Apparatus for stabilizing power supply of air suspension controlling actuator |
Applications Claiming Priority (1)
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KR1020120103604A KR20140036903A (en) | 2012-09-18 | 2012-09-18 | Apparatus for stabilizing power supply of air suspension controlling actuator |
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KR20140036903A true KR20140036903A (en) | 2014-03-26 |
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KR1020120103604A KR20140036903A (en) | 2012-09-18 | 2012-09-18 | Apparatus for stabilizing power supply of air suspension controlling actuator |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108183050A (en) * | 2018-02-27 | 2018-06-19 | 厦门芯阳科技股份有限公司 | A kind of high security switch control relay drive circuit |
CN111086445A (en) * | 2018-10-23 | 2020-05-01 | 矢崎总业株式会社 | Vehicle power supply circuit |
-
2012
- 2012-09-18 KR KR1020120103604A patent/KR20140036903A/en not_active Application Discontinuation
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108183050A (en) * | 2018-02-27 | 2018-06-19 | 厦门芯阳科技股份有限公司 | A kind of high security switch control relay drive circuit |
CN108183050B (en) * | 2018-02-27 | 2023-09-05 | 厦门芯阳科技股份有限公司 | High-safety switch control relay driving circuit |
CN111086445A (en) * | 2018-10-23 | 2020-05-01 | 矢崎总业株式会社 | Vehicle power supply circuit |
CN111086445B (en) * | 2018-10-23 | 2023-02-03 | 矢崎总业株式会社 | Vehicle power supply circuit |
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