KR20130113746A

KR20130113746A - Apparatus and method for reducing dark current

Info

Publication number: KR20130113746A
Application number: KR1020120036176A
Authority: KR
Inventors: 경제광; 김정한
Original assignee: 현대모비스 주식회사
Priority date: 2012-04-06
Filing date: 2012-04-06
Publication date: 2013-10-16

Abstract

The present invention discloses a dark current reduction device and method. A dark current reduction device according to an aspect of the present invention includes a main micom that controls functions of the vehicle body control module, except for a security indicator light control, and does not operate when the vehicle is turned off; And operating in a sleep mode even when the vehicle is turned off, performing the security indicator light control, and detecting a user input as an interrupt, operating the main micom to correspond to the user input by the main micom. And a sub micom for executing a function.

Description

Apparatus and Method for Reducing Dark Current}

The present invention relates to a vehicle body control module, and more particularly, to a dark current reduction device and method that can reduce the dark current required when starting off.

In general, when the vehicle is stopped, the vehicle stops the flow of current from the battery to various accessory devices such as the starter and the radio, but the battery current is continuously supplied to a device such as a controller or a current for immediate start-up. do. This current is called dark current.

The dark current reduction system is applied to a conventional body control module, and the microcomputer of the dark current reduction system detects whether a user input is input even in a ignition off state, and locks the car door using a remote wireless door device (RKE). Lock / Unlock and Security Indicator operation were controlled. In this case, however, the microcomputer operated in the normal mode consumed a lot of power.

To improve this, another conventional dark current reduction system detects whether a user input is input at start-up and has a separate input IC for notifying the microcomputer, and the microcomputer operates in the pseudo stop mode while locking the car door. Controlled lock / unlock and security indicators. However, in recent years, the dark current requirements have become more stringent and a method for further reducing the dark current has been required.

Disclosure of Invention The present invention has been made in the technical background as described above, and an object thereof is to provide an apparatus and method for reducing dark current that can not drive the main microcomputer of the vehicle body control module at the start-off.

A dark current reduction device according to an aspect of the present invention includes a main micom that controls functions of the vehicle body control module, except for a security indicator light control, and which does not operate when the vehicle is turned off; And operating in a sleep mode even when the vehicle is turned off, performing the security indicator light control, and detecting a user input as an interrupt, operating the main micom to correspond to the user input by the main micom. And a sub micom for executing a function.

According to another aspect of the present invention, a method of reducing dark current by a sub-microcom of a vehicle body control module may include: operating in a sleep mode when a vehicle is turned off and controlling a security indicator; And detecting a user input as an interrupt, operating the main micom, which is not operated as the vehicle is turned off, and executing a function corresponding to the user input by the main micom. .

According to the present invention, the main microcomputer can not be operated when the vehicle is turned off, so that the dark current can be further reduced, and the cost can be reduced by not using the input IC.

1 is a block diagram showing a dark current reduction device according to an embodiment of the present invention.
2 is a flowchart illustrating a dark current reduction method according to an embodiment of the present invention.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. As used herein, the terms " comprises, " and / or "comprising" refer to the presence or absence of one or more other components, steps, operations, and / Or additions.

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. 1 is a block diagram showing a dark current reduction device according to an embodiment of the present invention.

As shown in FIG. 1, the dark current reduction apparatus 10 according to the exemplary embodiment of the present invention includes a power supply unit 110, a main micom 120, a sub micom 130, and a wireless receiver 140. The dark current reduction device 10 may be a component of the vehicle body control module or may be a separate device.

The power supply unit 110 converts the magnitude of the vehicle battery power into the magnitude (for example, 5V) of the driving power of the main microcomputer 120 and the sub-microcom 130 and supplies the same to the main microcomputer 120 and the sub-microcom 130. .

The main microcomputer 120 operates when the vehicle is turned on to control functions of the body control module (eg, external mirror folding / unfolding, car door locking / opening, etc.) except for the security indicator control, and does not operate when the vehicle is turned off. .

The main microcomputer 120 performs a preset self control function by communicating with an instrument panel (CLU), a smart key unit (SMK), or a J / BOX and a controller area network (CAN) when the vehicle starts up.

In addition, the main microcomputer 120 may control a load connected to the output terminal when the vehicle starts on.

The sub micom 130 operates in the sleep mode even when the vehicle is turned off, and performs a function of controlling the security indicator, for example, a function driven when the vehicle is turned off.

When the sub micom 130 detects a user input as an interrupt, the sub micom 130 wakes up the main micom 120 to operate a function corresponding to the user input by the main micom 120. In this case, the sub micom 130 may be connected to the main micom 120 through a SPI (Serial Peripheral Interconnect) interface and may communicate with the SPI.

Here, the user input is an operation of a vehicle key in switch, a tail switch, an external mirror fold / unfold switch, a car door open / lock switch of a remote wireless door device (RKE), and the like. Can be.

For example, when the user operates the car door open / lock button using the remote wireless door device when the vehicle starts off, the sub micom 130 receives the wireless data from the wireless receiver 140 and receives the main microcomputer through SPI communication. Wake up the 120 to perform the car door opening / locking function by the main microcomputer 120.

When the sub micom 130 detects an input to be monitored such as a vehicle key in switch, a tail switch, or an external mirror fold / unfold switch when the vehicle is turned off, the sub micom 130 wakes up the main micom 120 through SPI communication. The main microcomputer 120 performs a function corresponding to the user input.

In addition, the sub micom 130 controls the security indicator by itself when the vehicle is turned off.

Hereinafter, a dark current reduction method according to an exemplary embodiment of the present invention will be described with reference to FIG. 2. 2 is a flowchart illustrating a dark current reduction method according to an embodiment of the present invention.

Referring to FIG. 2, when the start of the vehicle is turned off (S210), the sub micom 130 operates in a sleep mode and controls the security indicator (S220).

The sub-microcomputer 130 may receive a user input or a remote wireless door according to an operation of a vehicle key in switch, tail switch, or external mirror fold / unfold switch delivered as an interrupt. Check whether there is a user input transmitted from the device (S230).

When the sub micom 130 senses a user input, the sub micom 130 does not operate as the vehicle is turned off, and operates the main micom 120 (S240). When the main microcomputer 120 wakes up, the main microcomputer 120 checks the sensed user input and controls a function corresponding to the user input.

As described above, the present invention can turn off the main microcomputer and turn off the vehicle when the vehicle is turned off, thereby lowering the dark current and reducing the cost by not using the input IC.

While the present invention has been described in detail with reference to the accompanying drawings, it is to be understood that the invention is not limited to the above-described embodiments. Those skilled in the art will appreciate that various modifications, Of course, this is possible. Accordingly, the scope of protection of the present invention should not be limited to the above-described embodiments, but should be determined by the description of the following claims.

Claims

A main micom that controls functions of a body control module except for a security indicator control and which does not operate when the vehicle is turned off; And
A function that operates in a sleep mode even when the vehicle is turned off, performs the security indicator light control, and detects a user input as an interrupt to operate the main micom to respond to the user input by the main micom. Sub Micom to run
Dark current reduction device comprising a.

The method of claim 1, wherein the sub micom and the main micom,
A dark current reduction device that is for serial peripheral interconnect (SPI) communication.

The method of claim 1,
A dark current comprising the operation of at least one of a vehicle key in switch, a tail switch, an external mirror fold / unfold switch, and a car door open / lock switch of a remote wireless door device. Saving device.

As a method of reducing dark current by Sub Micom of the Body Control Module,
Operating in a sleep mode when the vehicle is turned off and controlling a security indicator; And
If the user input is detected as an interrupt, operating the main micom, which does not operate as the vehicle is turned off, executing a function corresponding to the user input by the main micom
Dark current reduction method comprising a.

The method of claim 4, wherein the operating of the control unit comprises:
The user input comprising operation of at least one of a vehicle key in switch, a tail switch, an external mirror fold / unfold switch, and a car door open / lock switch of a remote wireless door device; Detecting as an interrupt
It will include a dark current reduction method.