KR101043062B1 - Apparatus adapted smart key in the car and method for controlling standby current thereof - Google Patents

Abstract

PURPOSE: A vehicle device using a smart key and a method for controlling standby currents thereof are provided to reduce maintenance costs by extending the replacement time of a battery. CONSTITUTION: A vehicle device(100) using a smart key comprises main and sub power supply units(10,40) and main and sub MCU(20,50). When an enable signal is received or an input signal is sensed, the main power supply unit supplies first standby voltage. When a disable signal is received, the main power supply unit stops the supply of the first standby voltage. The sub power supply unit supplies second standby voltage. The main MCU is operated by the first standby voltage. The sub MCU is operated by the second standby voltage and senses the input signal.

Description

Vehicle device to which smart key is applied and its standby current control method {APPARATUS ADAPTED SMART KEY IN THE CAR AND METHOD FOR CONTROLLING STANDBY CURRENT THEREOF}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle system, and more particularly, to a vehicle device to which a smart key is applied and a method of controlling the standby current to minimize the standby current of the vehicle device to which the smart key is applied.

In general, as the vehicle rotates in one direction while a key is inserted into an inhibitor switch provided at one side of a driver's seat, a starting motor connected to the inhibitor switch is driven to start the engine. However, according to the conventional starting method, even though the starting state is already started, the starting motor is continuously operated by repeatedly rotating the keys by the driver's carelessness or inexperienced operation, thus generating noise in the engine room. Too often, the engine is excessively loaded, causing a breakdown of the starter and a failure of the vehicle.

In addition, according to this starting method, there is a fear that the driver has to carry the key at all times, and there is a concern that the key is lost, and there is an inconvenience that the vehicle cannot be started and started without the key.

Recently, in order to solve the above-mentioned inconvenience, a button-type vehicle starting device using a one-touch pushbutton using a smart key has been developed together with a system that can open and close a door of a vehicle using a smart key.

Vehicle devices equipped with these smart keys generally employ dual MCUs to double the stability of the vehicle compared to a single MCU system.

That is, in the smart key system, the main function is the passive entry (Easy Access) function and the power transition and the maintenance of power by the start button.In the smart key system, unlike the conventional mechanical key, the power is not maintained mechanically by the start button. As the system is transitioned and held electronically, if the system malfunctions or stops operating, the steering locks up or goes off and the brakes do not work.

In order to minimize the probability of such a malfunction, dual MCUs are applied to vehicles with smart keys so that even if one MCU malfunctions, the remaining MCU can control the operation of the smart keyed vehicle.

However, such a conventional smart key is applied to the vehicle device is a standby current consumption of the standby state that can detect (monitor) the input signal when the vehicle is turned off, such as the vehicle door open, remote control wireless transmission signal, etc. There was a problem that doubled depending on the power supplied to each MCU. Therefore, the vehicle battery state cannot be maintained for a long time, and thus, the life of the battery is shortened, and thus, the battery needs to be replaced, resulting in the inconvenience and the cost of replacing the battery.

The present invention has been made in view of the above problems, and the present invention relates to a vehicle system, and in particular, a vehicle device to which a smart key is applied to minimize a standby current of a vehicle device to which a smart key is applied, and a standby current control thereof. The purpose is to provide a method.

Another object of the present invention is to apply power to any one of the dual MCU to minimize the standby current consumed in the standby state of the vehicle, and to apply power to the other MCU when the wake-up signal is applied in the standby state The present invention provides a vehicle device to which a smart key is applied and a standby current control method thereof.

Technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

The vehicle device to which the smart key is applied according to an aspect of the present invention for achieving the above object, supplies a first standby voltage that was not supplied in the vehicle standby state when the enable signal is received or the input signal is detected, the disable signal A main power supply for stopping supply of the first standby voltage upon reception; A main MCU operating by the first standby voltage and controlling an operation of the vehicle after the input signal; A sub power supply unit supplying a second standby voltage in a vehicle standby state; And a sub-MCU which operates by the second standby voltage in the vehicle standby state to sense the input signal at all times, determine the output of the enable signal according to the detection, and perform an operation according to the input signal. It includes.

Here, the input signal refers to a signal to perform an operation corresponding to a signal input to the vehicle when the vehicle is turned off.

The CAN transceiver may further include a CAN transceiver configured to transmit an enable signal to the main power supply unit when CAN data is received through CAN communication in the vehicle standby state.

According to another aspect of the present invention, there is provided a method for controlling standby current of a vehicle apparatus to which a smart key is applied, the method for controlling standby current of a vehicle apparatus to which a smart key is applied by a main MCU and a sub-MCU, wherein the sub-MCU is configured to serve in a vehicle standby state. Receiving a first standby voltage from a power supply and detecting an input signal at all times, wherein the main MCU is not operated because the main power supply is disabled and not receiving a second standby voltage; And when the input signal is detected, enabling the main power supply unit to supply the second standby voltage to the main MCU.

The main power supply unit may further include supplying a second standby voltage, which is enabled and not supplied in the vehicle standby state, to the main MCU when the input signal is detected.

Here, the input signal refers to a signal to perform an operation corresponding to a signal input to the vehicle when the vehicle is turned off.

The present invention by the above-described problem solving means to minimize the standby current by applying the power of the standby state to any one of the dual MCU in the normal standby state of the vehicle, do not apply power to the other MCU, standby When the input signal is received in the state, power can be applied to the remaining MCUs, thereby minimizing standby current and extending battery life.

As a result, the replacement time of the battery is extended, thereby reducing the inconvenience of replacing the battery and reducing the cost of replacing the battery.

On the other hand, the vehicle device to which the smart key of the present invention and the standby current control method is applied power to any one of the dual MCU in the standby state of the vehicle to minimize the standby current consumed in the standby state of the vehicle, in the standby state When the wake-up signal is applied, the rest of the MCU can be supplied with power so that one MCU can be powered in the standby state to minimize the consumption of standby current.

In the following description, specific details of the vehicle device to which the smart key of the present invention is applied and its standby current control method are shown to provide a more general understanding of the present invention. It will be apparent to those skilled in the art that the present invention may be readily implemented.

In the following description, the input signal will be used immediately to mean a signal that can perform an operation corresponding to a signal input to the vehicle when the vehicle is turned off. This means that an interrupt signal (for example, an RF signal, Start switching signal, outside handle trigger switching signal) and signals received via can transceiver (e.g. door open signal, outside handle touch sensing signal, outside handle trigger switching signal, outside handle infrared sensing signal) Becomes

In addition, in the following description, the first and second standby voltages are used to distinguish the standby voltages supplied by the main power supply unit and the sub power supply unit, and it should be recognized that the terms “first and second” are used.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings, with reference to the parts necessary for understanding the operation and operation according to the present invention.

1 is an internal configuration of a vehicle device to which a smart key is applied according to an embodiment of the present invention.

As shown in FIG. 1, the vehicle device 100 to which the smart key is applied according to the present invention includes a main power supply 10, a main MCU 20, a CAN transceiver 30, and a sub power supply 40. And the sub-MCU 50 or the like.

When the enable signal is received or an input signal is detected, the main power supply 10 supplies the first standby voltage 5V, which is not supplied in the vehicle standby state, to the main MCU 20, and disables it. When the signal is received, the supply of the first standby voltage supplied to the main MCU 20 is stopped.

The main MCU 20 operates by the first standby voltage and controls to perform an operation of the vehicle after the input signal. In this case, the switch S / W is supplied to the main power supply 10 that recognizes the outside handle switching signal as an enable signal when it is switched on. Subsequently, when switching off due to the characteristics of the switch (S / W), the main MCU 20 may apply the enable signal to the main power supply 10 to maintain the enable state of the main power supply 10. Make sure

The CAN transceiver 30 transmits and receives CAN data based on a CAN communication method in a vehicle standby state, and transmits an enable signal to the main power supply unit 10 when CAN data is received. The CAN data may be a door open signal, an outside handle touch sensing signal, an outside hand trigger switching signal, or an outside handle infrared sensing signal.

The sub power supply 40 always supplies a second standby voltage to the sub MCU 50 in a vehicle standby state.

The sub-MCU 50 operates by the second standby voltage in the vehicle standby state and detects an input signal at all times, and outputs an enable signal to the main power supply unit 10 when the input signal is detected. However, if the input signal is not detected, the disable signal is output to the main power supply 10. In addition, the sub-MCU 50 transmits an enable signal to the main power supply 10 when the input signal is detected and controls to perform the operation of the vehicle according to the input signal.

Referring to FIG. 1, the operation of controlling the standby current of the vehicle apparatus to which the smart key is applied according to the present invention will be described. In the vehicle standby state, the main power supply unit 10 does not apply the first standby voltage to the main MCU 20. . However, the sub power supply unit 40 is always turned on by receiving the battery power BAT + and applies a second standby voltage to the sub MCU 50. Accordingly, when the input signal RF and interrupt is input to the sub MCU 50 in a state in which the consumption of the standby current according to the first standby voltage is reduced, the sub MCU 50 may enable the signal to the main power supply 10. Output the main power supply 10 to enable. Alternatively, when an input signal (interrupt) is directly input to the main power supply unit 10, or when the main power supply unit 10 receives the CAN data from the CAN transceiver 30, it is enabled and the first standby voltage to the main MCU 20 Will be supplied.

2 is a flowchart illustrating a method for controlling standby current of a vehicle apparatus to which a smart key is applied according to an embodiment of the present invention. Herein, the vehicle device 100 to which the smart key is applied is configured to have an internal configuration of the vehicle device 100 to which the smart key is applied, thereby minimizing the standby current consumed by the following standby current control method.

Referring to FIG. 2, the sub-MCU 50 receives a first standby voltage from the sub power supply 40 that is always on in the vehicle standby state (S201). In this case, the main MCU 20 does not operate because the main power supply 10 is disabled and the second standby voltage is not applied from the main power supply 10 (S203).

Thereafter, the sub-MCU 50 determines whether an input signal is detected (S205), and when the input signal is detected, the sub-MCU 50 enables the main power supply 10 to supply a second standby voltage to the main MCU 20. (S207).

At the same time, the sub-MCU 50 controls to perform the operation of the vehicle according to the input signal (S209). Steps 207 (S207) to 209 (S209) are performed almost simultaneously without the need for step 209 after step 207 is completed.

Here, the main power supply 10 is a condition that is enabled is not only a condition for receiving the enable signal transmitted from the sub-MCU 50, but also a condition in which the input signal is directly transmitted to the main power supply 10 for reception. The second standby voltage is supplied to the MCU 20.

However, if it is determined that the input signal is not detected, the sub-MCU 50 maintains the disabled state of the main power supply 10 (S211). As a result, the standby voltage is not supplied to the sub-MCU 50.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

1 is an internal configuration of a vehicle device to which a smart key is applied according to an embodiment of the present invention.

2 is a flowchart illustrating a standby current control method of a vehicle apparatus to which a smart key is applied according to an exemplary embodiment of the present invention.

Claims (6)

A main power supply for supplying a first standby voltage not supplied in a vehicle standby state when receiving an enable signal or detecting an input signal, and stopping supply of the first standby voltage when receiving a disable signal; A main MCU operating by the first standby voltage and controlling an operation of the vehicle after the input signal; A sub power supply unit supplying a second standby voltage in a vehicle standby state; And A sub-MCU that operates by the second standby voltage in the vehicle standby state and always detects the input signal, determines the output of the enable signal according to the detection and performs an operation according to the input signal; Vehicle device to which the smart key is applied, characterized in that it comprises a. The method of claim 1, wherein the input signal, And a signal for performing an operation corresponding to a signal input to the vehicle when the vehicle is turned off. The smart transceiver of claim 1, further comprising a CAN transceiver configured to transmit an enable signal to the main power supply when CAN data is received by CAN communication in the vehicle standby state. Vehicle device with key. In the standby current control method of the vehicle device to which the smart key is applied by the main MCU and the sub-MCU, In a vehicle standby state, the sub MCU receives a first standby voltage from a sub power supply unit to detect an input signal at all times, and the main MCU is not operated because the main power supply unit is disabled and the second standby voltage is not applied; And The sub MCU may enable the main power supply unit to supply the second standby voltage to the main MCU when the input signal is detected, wherein the standby current control of the vehicle device to which the smart key is applied is performed. Way. The smart key as claimed in claim 4, wherein the main power supply unit further comprises supplying a second standby voltage which is enabled when the input signal is detected and is not supplied in the vehicle standby state to the main MCU. Standby current control method of the vehicle device applied. The method of claim 4 or 5, wherein the input signal, The standby current control method of a vehicle device to which a smart key is applied, characterized in that the signal to perform the operation corresponding to the signal input to the vehicle when the vehicle is powered off.

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