KR101726169B1 - Input Structure for Ignition Key - Google Patents

Input Structure for Ignition Key Download PDF

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Publication number
KR101726169B1
KR101726169B1 KR1020150178678A KR20150178678A KR101726169B1 KR 101726169 B1 KR101726169 B1 KR 101726169B1 KR 1020150178678 A KR1020150178678 A KR 1020150178678A KR 20150178678 A KR20150178678 A KR 20150178678A KR 101726169 B1 KR101726169 B1 KR 101726169B1
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KR
South Korea
Prior art keywords
voltage
current
unit
input
current sources
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KR1020150178678A
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Korean (ko)
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정해성
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현대오트론 주식회사
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/01—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens
    • B60R25/04—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the propulsion system, e.g. engine or drive motor
    • B60R25/042—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the propulsion system, e.g. engine or drive motor operating on the fuel supply
    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

One embodiment of the present invention relates to a structure of inputting an ignition key and, more specifically, to a structure of inputting an ignition key configured to allow voltage of a battery to be provided to a controller of a vehicle by the closing of a main relay when a driver turns on the ignition key. According to one embodiment of the present invention, provided is a structure of inputting an ignition key, capable of preventing a phenomenon that an engine controller is repeatedly turned on/off by the input of the ignition key by adding a current source to the structure of inputting the ignition key.

Description

Input structure for input key {Input Structure for Ignition Key}

The present invention relates to a starter key input structure, and more particularly, to a starter key input structure in which a starter key is configured to be supplied to a controller of a vehicle by closing a main relay when the starter key is turned on by a driver, Input structure.

The contents described in this section merely provide background information on the embodiment of the present invention and do not constitute the prior art.

The ignition key is a very important input means in the vehicle. When the driver operates the ignition key by inserting and turning the ignition key, a signal is input to the vehicle. This signal may cause a large voltage disturbance. In this case, a TVS diode is used to protect the internal input circuit, Voltage to a voltage that the input circuit can tolerate.

At this time, if a large current is generated in the TVS diode, there is a risk of burnout. Therefore, when the TVS diode is operated using a series resistance, the TVS diode is protected through current limitation.

The engine controller receives the battery power from the output of the main relay to reduce the dark current when the vehicle is turned off.

  If the vehicle is turned off, the engine controller is not supplied with battery power because the main relay is in the open state. If the driver turns on the ignition key, the engine controller must operate, I can not work because there is not. Therefore, in order to solve this problem, the ignition key is used at the same time as the input and the power source.

That is, when a voltage equal to or higher than a predetermined voltage is input to the starter key input of the engine controller, the main relay control circuit of the engine controller operates, and the main relay is closed so that the battery power is supplied to the engine controller.

In order to perform such a series of processes, an input of a current for controlling the main relay occurs with a start key input. Since a normal input circuit does not have a current input, a series resistor may be used as a protection circuit using the above-described TVS diode in an input circuit. However, if a current input occurs as a start key input, A voltage drop due to the voltage drop occurs.

This voltage drop does not affect if the voltage input to the ignition key is sufficiently higher than the threshold value, but if the ignition key input voltage is near the threshold value, the voltage drop will cause the ignition key input voltage to fall between the threshold values It is possible to cause the above and below values to repeatedly occur.

For example, if the threshold is 6V and the initial input voltage of the starter key is 6.1V and the voltage dropped by the main relay operating current is 5.9V, then the initial engine controller is turned off by the 6.1V starter key input to the engine controller And when a current input for operating the main relay occurs, the ignition key voltage falls to 5.9 V and the engine controller is turned off.

In this case, since the starting current of the ignition key disappears, the ignition key voltage becomes 6.1 V, which causes the engine controller to be turned on again, and the above process is repeated.

An aspect of the present invention is to solve the above-described problems, and an object of the present invention is to provide a method and apparatus for controlling an engine by repeating on / off operations of an engine controller by inputting a start key by adding a current source to a start key input structure And to provide a starter key input structure that can prevent the starter key.

It is another object of the present invention to provide a starter key input structure capable of maintaining robustness against a large voltage noise from the outside using a small capacity TVS diode.

The technical object of the present invention is not limited to the above-mentioned technical objects and other technical objects which are not mentioned can be clearly understood by those skilled in the art from the following description will be.

In order to accomplish the above-mentioned object, one aspect of the present invention provides a power supply apparatus comprising: a starter key input unit receiving a starter key voltage VIG by inputting a starter key; A voltage comparator connected to the ignition key input unit for comparing an input voltage VIN formed by the ignition key voltage with a threshold voltage VTHD;

A divider circuit connected between the starter key input unit and the voltage comparator and dividing the starter key voltage into the input voltage and the partial voltage; A voltage clamping unit connected at one end to the voltage divider circuit and mitigating a voltage disturbance caused by an input of the ignition key; And

And a current adjusting unit for adjusting the amount of current flowing through the voltage dividing circuit to change a voltage division ratio of the input voltage and the partial voltage.

According to an embodiment, the voltage divider circuit may be a resistance element connected in series between the starter key input unit and one end of the voltage clamping unit.

According to an embodiment of the present invention, the voltage clamping unit may be a TVS diode having one end connected to the voltage dividing circuit and one end of the voltage comparing unit.

And the current adjusting unit adjusts the amount of current between an upper limit value and a lower limit value.

The current regulator may have a plurality of current sources, and at least some of the plurality of current sources may be on / off controlled.

The plurality of current sources of the current adjusting unit are normally kept in an on state, and when the input voltage is equal to or higher than the threshold voltage, the plurality of current sources are controlled to be off, thereby reducing the amount of current flowing to the voltage dividing circuit.

Here, the upper limit value may be a case where all the plurality of current sources are turned on, and the lower limit value may be a case where only one of the plurality of current sources is turned on.

The plurality of current sources may be two, and one of the two current sources may be on / off controlled by a switch.

The current adjusting unit may include at least one current source having one end connected to one end of the voltage dividing circuit and one end of the voltage comparing unit and the other end grounded.

According to another aspect of the present invention, there is provided an electronic device including: a starter key input unit receiving a starter key voltage (VIG) by inputting a starter key; A voltage comparator connected to the ignition key input unit for comparing an input voltage VIN formed by the ignition key voltage with a threshold voltage VTHD;

A resistance element connected in series between the start key input unit and one end of the voltage comparison unit; A TVS diode element having one end connected to one end of the resistance element and the one end of the voltage comparison portion, and the other end grounded; A current source connected in parallel with the TVS diode element; And

And a switch for on / off controlling the current source.

The current source includes a plurality of current sources, and the switch controls on / off of a part of the plurality of current sources.

The plurality of current sources are normally kept in an on state, and when the input voltage is equal to or higher than the threshold voltage, the plurality of current sources are controlled to be off, thereby reducing an amount of current flowing to the resistance element.

As described above, according to an embodiment of the present invention, a startup key input structure is provided that can prevent the engine controller from being repeatedly turned on / off by adding a current source to the starter key input structure .

Further, a startup key input structure capable of maintaining robustness against a large voltage noise from the outside using a small-capacity TVS diode is provided.

In addition, the effects of the present invention have various effects such as excellent general versatility according to the embodiments, and such effects can be clearly confirmed in the description of the embodiments described later.

1 shows a startup key input structure according to an embodiment of the present invention.
Fig. 2 shows an example of a starter key input structure without a current control section.
3 shows a starting key input structure in the case where the current regulating part includes a plurality of current sources.

Hereinafter, an embodiment of the present invention will be described in detail with reference to exemplary drawings.

It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference numerals whenever possible, even if they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In addition, the size and shape of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, terms specifically defined in consideration of the constitution and operation of the present invention are only for explaining the embodiments of the present invention, and do not limit the scope of the present invention.

1 shows a startup key input structure according to an embodiment of the present invention.

Referring to FIG. 1, the starter key input structure 100 according to the present embodiment includes a starter key input unit 110 receiving a starter key voltage VIG by inputting a starter key; A voltage comparator 120 connected to the ignition key input unit 110 for comparing an input voltage VIN formed by the ignition key voltage VIG with a threshold voltage VTHD;

A voltage dividing circuit 130 connected between the starting key input unit 110 and the voltage comparing unit 120 and dividing the starting key voltage VIG into the input voltage VIN and the partial voltage; A voltage clamping unit 140 connected to the voltage dividing circuit 130 for alleviating a voltage disturbance caused by the input of the ignition key; And

And a current adjuster 150 for adjusting the amount of current flowing to the voltage dividing circuit 130 to change the voltage division ratio of the input voltage VIN and the partial voltage.

The voltage dividing circuit 130 may include a resistance element Rs connected in series between the start key input unit 110 and one end of the voltage clamping unit 140. [ The voltage clamping unit 140 may include a TVS diode having one end connected to the voltage dividing circuit 130 and one end of the voltage comparing unit 120 and the other end grounded.

The way in which the engine controller of a vehicle receives battery power is usually divided into two types, one being supplied directly from the battery power source and the other being supplied via a relay.

The present embodiment can be applied to a method of being supplied through a main relay. That is, the present embodiment is an input structure that can be applied to a starter key input structure in which a main relay is interposed between an engine controller and a battery power source. In a vehicle having such a starter key input structure 100, ), The main relay is closed so that the battery voltage is supplied to the engine controller,

When the driver turns off the ignition key, the main relay is opened to disconnect the battery voltage from the engine controller. Since the engine controller and the battery voltage are disconnected in the state that the ignition key is turned off, the flow of the dark current can be cut off and the battery can be prevented from being discharged.

The startup key input structure 100 according to the present embodiment may have a structure for satisfying the requirements of the user. That is, the user may request that the engine controller be turned on when the ignition key voltage VIG is above a certain voltage, and the engine controller be turned off if the ignition key voltage VIG is below a certain voltage, . ≪ / RTI >

For example, when the threshold voltage VTHD is 3V, the engine start-up key input structure is configured so that the engine controller is turned on when the ignition key voltage VIG exceeds 3V. This starter keystroke structure can not meet the requirements of the user requiring a starter key voltage (VIG) higher than 3V. The startup key input structure 100 according to the present embodiment solves this problem by applying the voltage dividing circuit 130.

For example, when the requirement of the user is that the starter key voltage VIG is 4 V or more, the starter key input structure 100 according to the present embodiment is configured such that when the starter key voltage VIG of 4 V is input, The appropriate partial pressure ratio can be set through the voltage dividing circuit 130. [

The voltage divider circuit 130 has another function. That is, when a voltage disturbance is input to the ignition key input unit 110, the TVS diode dissipates the energy into heat to protect the internal circuit. The larger energy dissipation here requires the use of a larger TVS diode, which increases the size and manufacturing cost of the product, instead limiting the amount of current to the TVS diode by connecting a resistor (Rs) to the TVS diode.

As a result, the voltage divider circuit 130 can simultaneously perform the function of the divided voltage and the protection function of the TVS diode.

Fig. 2 shows an example of a starter key input structure without a current control section.

2, when the input voltage VIN in the ignition key input structure 200 is larger than the threshold voltage VTHD, the main relay controller (not shown) recognizes that the ignition key is on and the main relay (not shown) To increase the current in the circuit to drive it into the closing. Then, a larger amount of current flows in the voltage dividing circuit 210 than the usual amount of current, a voltage drop occurs in the resistor Rs of the voltage dividing circuit 210, and the input voltage VIN becomes relatively small.

For example, when a starting key voltage VIG of 4 V is applied to the starting key input structure 200 having the threshold voltage VTHD of 3 V and the resistance Rs of the voltage dividing circuit 210 of 1 K? The input voltage VIN is 3 V. When the amount of current flowing through the resistor Rs of the voltage divider circuit 210 is 2 mA in order to drive the main relay, , The voltage drop is 2V, so that the input voltage (VIN) is relatively lowered to 2V and falls below the threshold voltage (VTHD), causing the engine controller to be turned off.

1, in order to solve this problem, in this embodiment, the amount of current flowing through the voltage dividing circuit 130 is adjusted so that the input voltage VIN and the partial voltage Vs applied to the resistor Rs of the voltage dividing circuit 130 The current adjusting unit 150 is used to change the partial pressure ratio.

3 shows a starting key input structure in the case where the current regulating part includes a plurality of current sources.

The current regulator 150 may include at least one current source 151 and 152 having one end connected to one end of the voltage dividing circuit 130 and one end of the voltage comparator 120 and the other end grounded .

The current regulator 150 includes a plurality of current sources 151 and 152, and at least some of the plurality of current sources 151 and 152 may be on / off controlled. One end of each of the plurality of current sources 151 and 152 may be connected to one end of the voltage dividing circuit 130 and one end of the voltage comparing unit 120, and the other end may be grounded. The plurality of current sources 151 and 152 may all be connected in parallel, and they may be connected in parallel with the TVS diode.

Also, according to the embodiment, at least one of the plurality of current sources 151 and 152 may be connected to the switch 153, and may be on / off controlled by the switch 153. [

On the other hand, the plurality of current sources 151 and 152 are normally kept on, and when the input voltage VIN becomes equal to or higher than the threshold voltage VTHD, the current sources 151 and 152 are controlled to be turned off to reduce the amount of current flowing to the voltage dividing circuit 130 .

The current regulating unit 150 can adjust the amount of current flowing in the voltage dividing circuit 130 between the upper limit value and the lower limit value. Here, the upper limit value is a case where all the plurality of current sources are turned on, and the lower limit value may be a case where only one of the plurality of the current sources 151 and 152 is turned on.

According to the embodiment, the plurality of current sources 151 and 152 are two, and one of the two current sources 151 and 152 can be on / off controlled by the switch 153. [ In this case, normally, the two current sources 151 and 152 are both turned on, so that the upper limit value of the current amount flows in the resistor Rs of the voltage dividing circuit 130. When one of the two current sources 151 and 152 is connected to the switch 153 The lower limit value of the amount of current flows through the resistor Rs of the voltage divider circuit 130. Therefore,

The starter key input structure according to the present embodiment is configured such that the resistance value of the voltage divider circuit 130 is lowered by employing the current regulator 150 and the current flows much in the voltage divider circuit 130 from the beginning. The capacitance of the resistor Rs of the voltage dividing circuit 130 can be reduced by employing the current adjusting unit 150 so that the partial voltage of the voltage dividing circuit 130 is reduced and the input voltage VIN is reduced The input voltage VIN is relatively higher than the threshold voltage VTHD to prevent the engine controller from being turned off.

For example, the current regulating unit 150 includes a first current source 151 for passing a current amount DC1 of 2 mA and a second current source 152 for flowing a current amount DC2 of 1 mA, and a second current source 152 When the switch 153 is opened in the embodiment in which on / off control is performed by the switch 153, a current of 3 mA flows through the resistor Rs of the voltage dividing circuit 130 and a current of 2 mA flows, The drop is reduced, and the input voltage VIN instantaneously becomes larger than the threshold voltage VTHD. As a result, the starter key input structure 100 according to the present embodiment has a structure that is difficult to turn off once the engine controller is turned on.

Meanwhile, the startup key input structure according to another embodiment of the present invention includes a startup key input unit 110 that receives a startup key voltage VIG by inputting a startup key; A voltage comparator 120 connected to the ignition key input unit 110 for comparing an input voltage VIN formed by the ignition key voltage VIG with a threshold voltage VTHD;

A resistance element 130 connected in series between the ignition key input unit 110 and one end of the voltage comparison unit 120; A TVS diode element 140 having one end connected to one end of the resistor element 130 and the one end of the voltage comparator 120, and the other end grounded; Current sources 151 and 152 connected in parallel with the TVS diode device 140; And a switch 153 for on / off controlling the current source.

Here, the current sources 151 and 152 are plural, and the switch 153 can control ON / OFF of a part of the plurality of current sources 151 and 152.

The plurality of current sources 151 and 152 are normally kept in an on state and are turned off when the input voltage VIN becomes equal to or higher than the threshold voltage VTHD to reduce the amount of current flowing in the resistor element 130 .

The startup key input structure 100 described above may be implemented as an IC circuit having such a structure according to the embodiment, or as a starter key control box having the above-described IC circuit.

The above description is only illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention.

The embodiments disclosed in the present invention are not intended to limit the scope of the present invention and are not intended to limit the scope of the present invention.

The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: Startup key input structure
110: Start key input unit
120:
130:
140: Voltage clamping part
150:

Claims (11)

A start key input unit receiving a start key voltage by inputting a start key;
A voltage comparator connected to the ignition key input unit for comparing an input voltage formed by the ignition key voltage with a threshold voltage;
A divider circuit connected between the starter key input unit and the voltage comparator and dividing the starter key voltage into the input voltage and the partial voltage;
A voltage clamping unit connected at one end to the voltage divider circuit and mitigating a voltage disturbance caused by an input of the ignition key; And
A current regulator for regulating an amount of current flowing through the voltage divider circuit by adding a current source and changing a voltage division ratio of the input voltage and the partial voltage;
And a start key input structure. The method according to claim 1,
Wherein the voltage divider circuit is a resistance element connected in series between the starter key input unit and one end of the voltage clamping unit. The method according to claim 1,
Wherein the voltage clamping unit is a TVS diode having one end connected to the voltage dividing circuit and one end of the voltage comparing unit. The method according to claim 1,
Wherein the current regulating unit has a plurality of current sources, and at least a part of the plurality of current sources is on / off controlled. 5. The method of claim 4,
Wherein the plurality of current sources of the current adjusting unit are normally kept in an on state and are turned off when the input voltage is equal to or higher than the threshold voltage to reduce the amount of current flowing to the voltage dividing circuit. 5. The method of claim 4,
Wherein the current adjusting unit adjusts the amount of current between an upper limit value and a lower limit value,
Wherein the upper limit value is a case where all the plurality of current sources are turned on, and the lower limit value is a case where only one of the plurality of current sources is turned on. 5. The method of claim 4,
Wherein the plurality of current sources are two, and one of the two current sources is on / off controlled by a switch. The method according to claim 1,
Wherein the current adjusting unit includes at least one current source having one end connected to one end of the voltage dividing circuit and one end of the voltage comparing unit and the other end grounded. A start key input unit receiving a start key voltage by inputting a start key;
A voltage comparator connected to the ignition key input unit for comparing an input voltage formed by the ignition key voltage with a threshold voltage;
A resistance element connected in series between the start key input unit and one end of the voltage comparison unit;
A TVS diode element having one end connected to one end of the resistance element and the one end of the voltage comparison portion, and the other end grounded;
A current source connected in parallel with the TVS diode element; And
A switch for on / off controlling the current source;
And a start key input structure. 10. The method of claim 9,
Wherein the current source includes a plurality of switches, and the switch controls on / off of a part of the plurality of current sources. 11. The method of claim 10,
Wherein the plurality of current sources are normally kept in an on state, and when the input voltage is equal to or higher than the threshold voltage, the plurality of current sources are controlled to be off, thereby reducing an amount of current flowing to the resistance element.
KR1020150178678A 2015-12-14 2015-12-14 Input Structure for Ignition Key KR101726169B1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2606381B2 (en) * 1989-08-08 1997-04-30 株式会社デンソー Engine start state detecting device by starter and automatic starter of starter using the device
JPH09505862A (en) * 1993-12-03 1997-06-10 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング Internal combustion engine restart circuit device and restart method
JP2002501854A (en) * 1998-02-02 2002-01-22 ラブケン・リミテッド・パートナーズ・インコーポレイテッド Anti-theft shut-off system for vehicle starter or solenoid circuit
JP3300837B2 (en) * 1991-07-18 2002-07-08 イートン コーポレーション Engine start method for electronically controlled vehicle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2606381B2 (en) * 1989-08-08 1997-04-30 株式会社デンソー Engine start state detecting device by starter and automatic starter of starter using the device
JP3300837B2 (en) * 1991-07-18 2002-07-08 イートン コーポレーション Engine start method for electronically controlled vehicle
JPH09505862A (en) * 1993-12-03 1997-06-10 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング Internal combustion engine restart circuit device and restart method
JP2002501854A (en) * 1998-02-02 2002-01-22 ラブケン・リミテッド・パートナーズ・インコーポレイテッド Anti-theft shut-off system for vehicle starter or solenoid circuit

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