KR101453985B1 - Electronic control circuit for vehichle - Google Patents

Electronic control circuit for vehichle Download PDF

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Publication number
KR101453985B1
KR101453985B1 KR1020140028926A KR20140028926A KR101453985B1 KR 101453985 B1 KR101453985 B1 KR 101453985B1 KR 1020140028926 A KR1020140028926 A KR 1020140028926A KR 20140028926 A KR20140028926 A KR 20140028926A KR 101453985 B1 KR101453985 B1 KR 101453985B1
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KR
South Korea
Prior art keywords
unit
switch
transistor
output
input
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KR1020140028926A
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Korean (ko)
Inventor
조창룡
Original Assignee
콘티넨탈 오토모티브 시스템 주식회사
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Priority to KR1020140028926A priority Critical patent/KR101453985B1/en
Application granted granted Critical
Publication of KR101453985B1 publication Critical patent/KR101453985B1/en
Priority to PCT/EP2015/054461 priority patent/WO2015135803A1/en

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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

Abstract

Disclosed is a switch-off-path circuit of an electronic device for a vehicle. The circuit includes a monitoring unit having an enabling output and a negative enabling output; a controller unit having an enabling output and a negative enabling output; a switch unit wherein the outputs of the monitoring unit and the controller unit are inputted as input signals; and a cut-off unit, wherein the outputs of the monitoring unit and the controller unit are respectively inputted to base and emitter terminals of a transistor included in the switch unit, and an output of a collector terminal of the transistor included in the switch unit may be inputted as a control signal of the cut-off unit.

Description

[0001] ELECTRONIC CONTROL CIRCUIT FOR VEHICHLE [0002]

BACKGROUND 1. Technical Field The present disclosure relates to an electronic control circuit for a vehicle. More particularly, the present disclosure relates to a switch-off-path circuit for blocking the associated power in the event of a safety-critical situation.

Recently, studies for securing the safety of an electronic control unit (ECU) have been actively conducted, and international standardization activities are being carried out.

ISO 26262 is an international standard for functional safety of automobiles. It is a functional safety standard established to minimize accidents and loss of life caused by malfunction of automobile electronic control devices. It is participated by 27 automobile manufacturers and parts suppliers in 10 countries. ISO 26262 addresses the safety requirements for the entire life cycle, from initial development to production and disposal.

In vehicle development in accordance with the international standard ISO 26262, which ensures the safety of the driver, all safety-related automotive electronic circuits require a switch-off-path to cut off the power involved in the event of a safety hazard.

Conventional conventional switch-off-path circuits have a large number of components used in the implementation, and there is a risk of single point failure where the switch-off-path is energized by a single component failure.

Accordingly, it is required to design a switch-off-path circuit that minimizes the number of components used and does not cause malfunction due to a single point fault.
The background art of the present invention is disclosed in Korean Patent Laid-Open Publication No. 10-2005-0006450 (July 17, 2005).

It is the purpose of this disclosure to provide a switch-off-path circuit. More specifically, the present specification aims to propose a simple and robust Switch-off-path circuit.

A switch off-path circuit is provided in accordance with one embodiment of the present disclosure. The switch off-path circuit may include a monitoring unit having an enable output and a negative enable output; A controller unit having an enable output and a negative enable output; A switch unit into which the outputs of the monitoring unit and the controller unit are input to the input signal; And a cut-off unit,

Wherein the outputs of the monitoring unit and the controller unit are respectively input to a base and an emitter terminal of a transistor included in the switch unit, And is input as a control signal of a cut-off unit.

Wherein the cut-off unit includes a first transistor and a second transistor, wherein the first transistor and the second transistor are configured such that when one of the two transistors is short-circuited, So that it can be arranged in two stages.

A third transistor having an enable output of the controller unit input to the base terminal and a negative enable output of the monitoring unit input to the emitter terminal; The enable output of the monitoring unit is input to the base terminal, and the negative enable output of the monitoring unit is input to the emitter terminal.

The collector terminal output of the third transistor is input as a control signal of the first transistor of the cut-off unit, and the collector terminal output of the fourth transistor is input as a control signal of the second transistor of the cut-off unit.

The switch-off-path circuit may further include a voltage supervisor.

The output of the voltage monitoring unit may be input to a base terminal of a transistor included in the switch unit.

Embodiments of the present invention can reduce the production cost by minimizing the number of parts to be used while meeting all the requirements of the safety switch circuit, as well as significantly reducing malfunction due to random errors of individual components. Embodiments of the present invention also have the advantage of eliminating single point faults where a single component fails to be fully functional.

1 is a schematic configuration diagram of a switch off-path circuit according to an embodiment of the present invention.
2 is a diagram illustrating a switch off path circuit according to an embodiment of the present invention.
3 is a diagram for explaining an operation condition of a switch off-path circuit according to an embodiment of the present invention.

It is noted that the technical terms used herein are used only to describe specific embodiments and are not intended to limit the invention. It is also to be understood that the technical terms used herein are to be interpreted in a sense generally understood by a person skilled in the art to which the present invention belongs, Should not be construed to mean, or be interpreted in an excessively reduced sense. Further, when a technical term used herein is an erroneous technical term that does not accurately express the spirit of the present invention, it should be understood that technical terms that can be understood by a person skilled in the art are replaced. In addition, the general terms used in the present invention should be interpreted according to a predefined or prior context, and should not be construed as being excessively reduced.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like or similar elements throughout the several views, and redundant description thereof will be omitted. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a schematic configuration diagram of a switch off-path circuit according to an embodiment of the present invention.

As shown in FIG. 1, a switch-off-path (SWOP) circuit 100 according to an embodiment of the present invention is a switch-off-path Function. The switch off path circuit 100 may include a controller unit 101, a monitoring unit 102, a switch unit 104, and a cut-off unit 105. The switch off path circuit 100 may further include a voltage supervisor 103.

The controller unit 101 performs control of a vehicle electronic device (ECU, TCU, etc.), and outputs an abnormality of each electronic device as a predefined signal. The controller unit 101 may have an enable (MC ENDRV) output and a negative enable (MC nENDRV) output.

The monitoring unit 102 performs monitoring of the vehicle electronic device and outputs an abnormality as a predefined signal. The monitoring unit 102 may have an enable (MU ENDRV) output and a negative enable (MU nENDRV) output.

The voltage monitoring unit 103 monitors whether or not the voltage supplied to the vehicle electronic apparatus is abnormal, and outputs the abnormality as a predefined signal. The voltage monitoring unit 103 may have an output terminal VS output.

The switch unit 104 is provided to output a control signal for the cut-off unit 105 in accordance with output signals of the controller unit 101, the monitoring unit 102 and / or the voltage monitoring unit 103 . The output of the controller unit 101 and the monitoring unit 102 may be coupled to the base of the transistor included in the switch unit 104 and the emitter And emitter terminals, respectively. For example, the outputs of MC ENDRV and MU ENDRV may be input to the base terminals of the transistors included in the switch unit 104, and MC nENDRV and MU nENDRV may be input to the emitter terminals of the transistors included in the switch unit 104 . The output of the voltage monitoring unit 103 may be input to a base terminal of a transistor included in the switch unit 104. [

If the switch unit 104 is composed of two transistors, one of the transistors is inputted to the base terminal of the enable output MC ENDRV of the controller unit 101, The negative enable output MC nENDRV is input to the emitter terminal and the other transistor is turned on when the enable output MU ENDRV of the monitoring unit 102 is input to the base terminal and the negative The enable output (MU nENDRV) may be input to the emitter terminal.

On the other hand, the output of the switch unit 104 can be input as a control signal of a cut-off unit. For example, the collector terminal output of the transistor included in the switch unit 104 may be input as a control signal of the cut-off unit 105. [

The cut-off unit 105 may perform a cut-off operation of the switch off path circuit 100 in accordance with a control signal input from the switch unit 104. [

The cut-off unit 105 may include two transistors, wherein the two transistors are configured such that when one of the two transistors is short-circuited, the switch off- So that it can be arranged in two stages. If the switch unit 104 is composed of two transistors, the collector terminal output of one of the transistors is input as a control signal of the first transistor of the cut-off unit 105, and the collector terminal of the other transistor And the output may be input as a control signal of the second transistor of the cut-off unit 105. [

The switch off-path circuit 100 configured as described above has the following characteristics.

The monitoring unit 101 and the controller unit 101 each have an active high output and a negative active output, respectively, as input signals for controlling the switch off path. This ensures switch-off when both outputs are stuck high or stuck low at the same time as a fault.

- If the core supply is unstable through the monitoring of the core supply, the switch off path can be switched off.

- If any of the input signals controlling the switch off path is not satisfied, it is switched off.

- Does not have a single point fault.

As described above, according to the switch off-path circuit according to an embodiment of the present invention, it is possible to reduce the number of parts to be used, while satisfying all necessary conditions, The rate can be significantly reduced. Also, there is no single point fault that is functional in the event of a single component failure.

Hereinafter, the configuration and operation of the switch off-path circuit according to one embodiment of the present invention will be described in detail with reference to FIGS. 2 and 3. FIG. Here, for convenience of explanation, the constitution shown in FIG. 1 described above will be described with reference to corresponding reference numerals.

2 is a diagram illustrating a switch off path circuit according to an embodiment of the present invention.

In the example of FIG. 2, the cut-off unit 105 includes two transistors, and the switch unit 104 is also composed of two transistors T3 and T4. In the illustrated embodiment, the enable (ENDRV) output and the negative enable (nENDRV) output of the controller unit 101 are connected to the base / emitter terminal of one transistor T3. The enable (ENDRV) output and the negative enable (nENDRV) output of the monitoring unit 102 are also connected to the base / emitter of one transistor T4.

After the input circuit is constructed as described above, the outputs of the switch units 104, T3 and T4 are used as control signals for the cut-off units T1 and T2. This reduces the number of components to a minimum.

Further, by connecting the output signal of the voltage monitoring unit 103 to the base terminal of T3, it is possible to configure a switch-off path circuit without further component addition

On the other hand, by disposing the transistors in two stages in the switch-off path as shown in FIG. 2, the second transistor prevents the switch off path from being forcedly energized when one transistor causes a short circuit fault, A single point failure can be prevented.

3 is a table for explaining operation conditions of a switch off-path circuit according to an embodiment of the present invention. 3, when the enable (MU ENDRV) output of the over-monitoring unit 102 of the controller unit 101 is 1 and the output of the over-monitoring unit 102 of the controller unit 101 is negative T3 and T4 are turned ON when the negative output (MC nENDRV) of the voltage monitoring unit 103 is 0 and the output (VS output) of the voltage monitoring unit 103 is 1, The whole operation is ON, and the power supply is cut off. In other cases, the switch-off path operates as OFF.

As described above, according to the switch off-path circuit according to an embodiment of the present invention, it is possible to reduce the number of parts to be used, while satisfying all necessary conditions, The rate can be significantly reduced. Also, there is no single point fault that is functional in the event of a single component failure.

It should be understood that the functional operations and subject matter implementations described herein may be implemented as digital electronic circuitry, or may be embodied in computer software, firmware, or hardware, including the structures disclosed herein, and structural equivalents thereof, . Implementations of the subject matter described herein may be implemented as one or more computer program products, i. E. One or more modules relating to computer program instructions encoded on a type of program storage medium for execution by, or control of, the operation of the processing system Can be implemented.

While the specification contains a number of specific implementation details, it should be understood that they are not to be construed as limitations on the scope of any invention or claim, but rather on the description of features that may be specific to a particular embodiment of a particular invention Should be understood. Likewise, the specific features described herein in the context of separate embodiments may be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented in multiple embodiments, either individually or in any suitable subcombination. Further, although the features may operate in a particular combination and may be initially described as so claimed, one or more features from the claimed combination may in some cases be excluded from the combination, Or a variant of a subcombination.

It is also to be understood that although the present invention is described herein with particular sequence of operations in the drawings, it is to be understood that it is to be understood that it is to be understood that all such illustrated acts have to be performed or that such acts must be performed in their particular order or sequential order, Can not be done. In certain cases, multitasking and parallel processing may be advantageous. Also, the separation of the various system components of the above-described embodiments should not be understood as requiring such separation in all embodiments, and the described program components and systems will generally be integrated together into a single software product or packaged into multiple software products It should be understood that

As such, the present specification is not intended to limit the specification to the specific terminology presented. Thus, while this disclosure has been described in detail with reference to the above examples, those skilled in the art will be able to make adaptations, modifications and variations to these examples without departing from the scope of the present disclosure. The scope of the present invention is defined by the appended claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present specification do.

According to the electronic control circuit of the present invention, it is possible to reduce the production cost by minimizing the number of parts to be used and to significantly reduce the malfunction due to random errors of the individual parts. Therefore, It is an invention that is industrially applicable because it is not only the use for technology but also the possibility of commercialization or operation of the applied device is sufficient as well as practically and practically possible.

100: Switch-off-path (SWOP) circuit
101: Controller unit
102: Monitoring unit
103: Voltage monitoring unit
104: Switch unit
105: Cutoff unit

Claims (6)

A switch-off-path circuit of an automotive electronic device,
A monitoring unit having an enable output and a negative enable output;
A controller unit having an enable output and a negative enable output;
A switch unit into which the outputs of the monitoring unit and the controller unit are input to the input signal; And
Comprising a cut-off unit,
The outputs of the monitoring unit and the controller unit are input to a base and an emitter terminal of a transistor included in the switch unit,
Wherein a collector terminal output of the transistor included in the switch unit is input as a control signal of a cut-off unit. The method according to claim 1,
Wherein the cut-off unit includes a first transistor and a second transistor,
Wherein the first transistor and the second transistor are arranged in two stages such that when one of the two transistors is short-circuited, the other transistor prevents the switch off-path circuit from forcibly energizing. . 3. The method of claim 2,
The switch unit includes:
A third transistor having an enable output of the controller unit input to a base terminal and a negative enable output of the monitoring unit being input to an emitter terminal; And
Wherein the enable output of the monitoring unit is input to the base terminal and the negative enable output of the monitoring unit is input to the emitter terminal. The method of claim 3,
A collector terminal output of the third transistor is input as a control signal of the first transistor of the cut-off unit,
And a collector terminal output of the fourth transistor is input as a control signal of the second transistor of the cut-off unit. The method according to claim 1,
The switch-off-path circuit comprises:
Further comprising a voltage supervisor. ≪ Desc / Clms Page number 13 > 6. The method of claim 5,
Wherein an output of the voltage monitoring unit is input to a base terminal of a transistor included in the switch unit.
KR1020140028926A 2014-03-12 2014-03-12 Electronic control circuit for vehichle KR101453985B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020140028926A KR101453985B1 (en) 2014-03-12 2014-03-12 Electronic control circuit for vehichle
PCT/EP2015/054461 WO2015135803A1 (en) 2014-03-12 2015-03-04 Electronic control circuit for vehicle

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Application Number Priority Date Filing Date Title
KR1020140028926A KR101453985B1 (en) 2014-03-12 2014-03-12 Electronic control circuit for vehichle

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KR101453985B1 true KR101453985B1 (en) 2014-10-28

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DE102020208854A1 (en) * 2020-07-15 2022-01-20 Vitesco Technologies GmbH Semiconductor chip and security circuit arrangement with such a semiconductor chip

Citations (3)

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KR100678620B1 (en) 2001-08-10 2007-02-05 주식회사 만도 Relay driving circuit using power and mcu check of electric control apparatus for vehicles
KR101012531B1 (en) 2008-07-22 2011-02-07 한국오므론전장주식회사 Fail safe Output circuit of AHLS
JP2012065417A (en) 2010-09-15 2012-03-29 Hitachi Ltd Power supply interruption device and electric apparatus

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US20110304202A1 (en) * 2010-05-13 2011-12-15 Coda Automotive, Inc. Battery disconnection in electric vehicles
JP5563077B2 (en) * 2010-06-18 2014-07-30 日立オートモティブシステムズ株式会社 Electronic control unit
DE102010026768A1 (en) * 2010-07-10 2011-04-21 Daimler Ag Motor vehicle safety system, particularly for electrical motor vehicle driving device, has control or regulation unit, which is provided to answer crash signal and to determine switching signal
DE102011104224A1 (en) * 2011-06-15 2012-12-20 Volkswagen Ag Method for safely deactivating a high-voltage network of a motor vehicle and motor vehicle
JP5605856B2 (en) * 2012-02-20 2014-10-15 オムロンオートモーティブエレクトロニクス株式会社 Power control device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100678620B1 (en) 2001-08-10 2007-02-05 주식회사 만도 Relay driving circuit using power and mcu check of electric control apparatus for vehicles
KR101012531B1 (en) 2008-07-22 2011-02-07 한국오므론전장주식회사 Fail safe Output circuit of AHLS
JP2012065417A (en) 2010-09-15 2012-03-29 Hitachi Ltd Power supply interruption device and electric apparatus

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