KR102320893B1 - Apparatus and method for preventing sudden unexpected acceleration of automobiles - Google Patents

Abstract

The present invention relates to an accelerator position sensor for detecting the position of an accelerator pedal, an object detection sensor provided on the accelerator pedal to identify whether an object exists around the accelerator pedal, a throttle position sensor for measuring the acceleration state of the vehicle, and acceleration It is determined whether sudden acceleration occurs based on at least one of the position of the pedal and whether there is an object around the accelerator pedal and the acceleration state of the vehicle, and in response to identifying the occurrence of sudden acceleration, the electric motor of the vehicle is operated by the engine of the vehicle. It is characterized in that it comprises a control unit for controlling the sudden start by rotating in the opposite direction to the operating direction.

Description

Apparatus and method for preventing sudden start of a hybrid vehicle

The present invention relates to an apparatus and method for preventing sudden acceleration for a hybrid vehicle, and more particularly, determining whether a vehicle accelerates rapidly based on acceleration information and whether an object is detected around an accelerator pedal, and when sudden acceleration occurs, the electric motor is opposite to the engine of the vehicle The present invention relates to an apparatus and method for preventing sudden acceleration of a hybrid vehicle for controlling sudden acceleration by rotating in a direction.

A sudden start accident is a phenomenon in which the vehicle starts at a sudden acceleration while it is stopped.

Sudden acceleration of a vehicle occurs when the driver starts the vehicle while the vehicle is stopped and then an abnormal engine torque occurs even if the accelerator pedal is not pressed or lightly stepped on, and the vehicle accelerates or retracts unexpectedly from the intention of the driver.

Until now, sudden acceleration accidents have occurred frequently regardless of the system of imported vehicles, domestic vehicles, or automobile manufacturers. This is a situation in which the responsibility is shifted to the driver's negligence in driving.

In order to prevent such sudden acceleration, a shift lock system is used that allows the shift lever of the automatic transmission to move only when the brake is applied. the current situation.

The background technology of the present invention is disclosed in 'a method for preventing sudden acceleration of an automatic transmission vehicle' of Korean Patent Application Laid-Open No. 10-2018-0073143 (2018.07.02.).

The present invention has been devised to solve the above problems, and an object according to an aspect of the present invention is to determine whether the vehicle accelerates rapidly based on acceleration information and whether objects around the accelerator pedal are detected, and to operate an electric motor when sudden acceleration occurs. To provide an apparatus and method for preventing sudden acceleration of a hybrid vehicle by rotating it in the opposite direction to the engine of the vehicle to control sudden acceleration.

An apparatus for preventing sudden acceleration for a hybrid vehicle according to an aspect of the present invention includes an accelerator position sensor for detecting a position of an accelerator pedal, an object detection sensor provided on the accelerator pedal to identify whether an object exists around the accelerator pedal, and the vehicle's A throttle position sensor for measuring an acceleration state, a position of the accelerator pedal, and at least one of whether an object exists around the accelerator pedal, and determining whether a sudden acceleration occurs based on the acceleration state of the vehicle In response to the identification, by rotating the electric motor of the vehicle in a direction opposite to the direction in which the engine of the vehicle operates, it characterized in that it comprises a control unit for controlling the sudden start.

In the present invention, the object detection sensor includes at least one of an ultrasonic sensor and an infrared sensor.

In the present invention, the controller receives the engine torque according to the sudden start from the outside through CAN communication, and rotates the electric motor with a torque equal to the engine torque.

In the present invention, when the sudden acceleration still occurs even after controlling the sudden acceleration by rotating the electric motor, the control unit blocks the fuel supply for operating the engine of the vehicle through a TCU (Transmission Control Unit) to cut off the sudden acceleration. characterized in that it controls.

In the present invention, when the engine of the vehicle is turned off by rotating the electric motor to control sudden acceleration, the controller stops the rotation of the electric motor.

In the present invention, the control unit is characterized in that it generates an alarm informing the driver of the vehicle that the sudden acceleration is controlled by rotating the electric motor.

A method for preventing sudden acceleration for a hybrid vehicle according to an aspect of the present invention includes the steps of: an accelerator position sensor detecting a position of an accelerator pedal; an object detection sensor identifying whether an object exists around the accelerator pedal; a throttle position sensor A, measuring an acceleration state of the vehicle, and determining, by a controller, whether sudden acceleration occurs based on at least one of a position of the accelerator pedal, whether an object exists around the accelerator pedal, and an acceleration state of the vehicle and controlling, by the control unit, the sudden acceleration by rotating the electric motor of the vehicle in a direction opposite to the direction in which the engine of the vehicle operates in response to identifying the occurrence of the sudden acceleration.

In the present invention, the object detection sensor includes at least one of an ultrasonic sensor and an infrared sensor.

In the controlling step of the present invention, the control unit receives the engine torque according to the sudden start from the outside through CAN communication, and rotates the electric motor with a torque equal to the engine torque.

In the present invention, when the control unit rotates the electric motor to control the sudden start and the sudden start still occurs, the controller blocks the fuel supply for operating the engine of the vehicle through a TCU (Transmission Control Unit) to stop the sudden start. It characterized in that it further comprises the step of controlling.

In the present invention, when the engine of the vehicle is turned off as the controller rotates the electric motor to control the sudden start, stopping the rotation of the electric motor may be further included.

In the controlling step of the present invention, the control unit is characterized in that it generates an alarm informing the driver of the vehicle that the sudden acceleration is controlled by rotating the electric motor.

According to one aspect of the present invention, the present invention determines whether the vehicle accelerates rapidly based on acceleration information and whether objects are detected around the accelerator pedal, and when the sudden acceleration occurs, the electric motor is rotated in the opposite direction to the engine of the vehicle to effectively accelerate the vehicle. can be controlled

1 is a block diagram illustrating an apparatus for preventing sudden acceleration for a hybrid vehicle according to an embodiment of the present invention.
2 is a first flowchart illustrating a method for preventing sudden acceleration for a hybrid vehicle according to an embodiment of the present invention.
3 is a second flowchart illustrating a method for preventing sudden acceleration for a hybrid vehicle according to an embodiment of the present invention.

Hereinafter, an apparatus and method for preventing sudden acceleration for a hybrid vehicle according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators. Therefore, definitions of these terms should be made based on the content throughout this specification.

1 is a block diagram illustrating an apparatus for preventing sudden acceleration for a hybrid vehicle according to an embodiment of the present invention.

1, the apparatus for preventing sudden acceleration of a hybrid vehicle according to an embodiment of the present invention includes an accelerator position sensor 100, an object detection sensor 200, a throttle position sensor 300, a control unit 400, and an electric motor ( 500) may be included.

The accelerator position sensor 100 may detect the position of the accelerator pedal.

The accelerator position sensor 100 may detect the degree to which the accelerator pedal is pressed by the driver while driving the vehicle, and may indicate the position of the accelerator pedal as 0 to 100% according to the degree to which the accelerator pedal is pressed.

For example, the accelerator position sensor 100 may indicate the position of the accelerator pedal as 0% when the accelerator pedal is not pressed, and may indicate the position of the accelerator pedal as 100% when the accelerator pedal is maximally depressed.

The object detection sensor 200 may detect whether an object exists around the accelerator pedal.

For example, the object detecting sensor 200 may be provided on the neck of the accelerator pedal to detect whether an object or the driver's body is present around the accelerator pedal.

According to an embodiment of the present invention, the object detecting sensor 200 may include at least one of an ultrasonic sensor and an infrared sensor.

For example, the object detection sensor 200 may include a PIR (Pyroelectric InfraRed) sensor, and by detecting infrared rays generated from the human body or object through the PIR sensor, it is possible to identify the presence of a human body or object around the accelerator pedal. have.

However, the present embodiment is not limited thereto, and various methods for detecting whether an object or a driver's body is present in the vicinity of the accelerator pedal may be employed.

The throttle position sensor 300 may detect an acceleration state of the vehicle.

The throttle position sensor 300 may be provided on the throttle body to detect an opening degree of the throttle valve to detect an acceleration state of the vehicle.

The throttle position sensor 300 may indicate the opening degree of the throttle valve as 0-100% according to the acceleration state of the vehicle.

For example, the throttle position sensor 300 may indicate the opening degree of the throttle valve as 0% when the vehicle is not accelerating, and may indicate the opening amount of the throttle valve as 100% when the vehicle accelerates to the maximum.

In general, when the vehicle accelerates rapidly, the opening degree of the throttle valve is measured to be 100%.

The control unit 400 includes at least one of the position of the accelerator pedal detected by the accelerator position sensor 100 and whether there is an object around the accelerator pedal detected by the object detection sensor 200 and the throttle position sensor 300 . Determining whether the vehicle accelerates rapidly based on the acceleration state of the vehicle measured through can be controlled.

In a hybrid vehicle, a structure in which the engine and the electric motor 500 are interlocked is adopted.

According to an embodiment of the present invention, when the engine rotates in the hybrid vehicle, the electric motor 500 rotates even if there is no torque output from the electric motor 500 connected to the engine, and conversely, the electric motor 500 rotates the torque. output and rotate, the engine also rotates.

Therefore, when the engine of the hybrid vehicle is rotating by outputting torque, if the electric motor 500 having a structure interlocking with the engine is rotated in the opposite direction to the direction in which the engine operates, the engine cannot rotate anymore and is stopped.

Meanwhile, the electric motor 500 applied to the hybrid vehicle may output sufficient torque (eg, 205N.m or 20.95kgf.m) to suppress the torque of the engine connected to the electric motor 500 . .

In addition, unlike the engine that gradually increases the torque, the electric motor 500 can increase the torque at a faster speed than the engine, so it is better to quickly control the sudden start generated by the engine using the electric motor 500 . possible.

The control unit 400 may determine whether sudden acceleration occurs based on the amount of opening of the throttle valve sensed by the throttle position sensor 300 .

For example, the controller may determine that sudden acceleration occurs when the opening amount of the throttle valve is equal to or greater than a preset reference opening amount (eg, when the opening amount of the throttle valve is 100%).

The reference opening degree is the opening degree of the throttle valve measured when sudden acceleration occurs. In general, the opening degree of the throttle valve is measured as 100% when sudden acceleration occurs.

Thereafter, the control unit 400 may determine whether sudden acceleration occurs based on the position of the accelerator pedal detected by the accelerator position sensor 100 .

For example, when the position of the accelerator pedal measured through the accelerator position sensor 100 is less than a preset reference position (eg, when the position of the accelerator pedal is 99%), the controller 400 may determine that sudden acceleration has occurred. have.

In general, when sudden acceleration occurs, the opening degree of the throttle valve is measured to be 100%, and accordingly, the vehicle accelerates to the maximum. In order to realize 100% of the opening degree of the throttle valve at the driver's will, the accelerator pedal must be fully depressed. Accordingly, the reference position may be set when the position of the accelerator pedal is 99% in order to determine whether or not the driver has fully pressed the accelerator pedal.

For example, if the position of the accelerator pedal detected by the accelerator position sensor 100 is 50% but the opening degree of the throttle valve measured by the throttle position sensor 300 is 100%, the driver sets the accelerator pedal to 50%. However, unlike this, since the vehicle is accelerating to the maximum, it can be determined that the vehicle is currently accelerating rapidly.

In addition, the control unit 400 detects the vicinity of the accelerator pedal through the object detection sensor 200 , and as a result of detecting the vicinity of the accelerator pedal, the opening degree of the throttle valve measured by the throttle position sensor 300 is the reference opening amount even though no object is detected around the accelerator pedal. (Example: when the opening degree of the throttle valve is 100%) or higher, the vehicle is accelerating to the maximum even though there are no objects around the accelerator pedal, so it can be determined that the vehicle is rapidly moving.

In addition, the control unit 400 accelerates through the object detection sensor 200 while the position of the accelerator pedal measured by the accelerator position sensor 100 is less than a preset reference position (eg, when the position of the accelerator pedal is 99%). As a result of detecting the vicinity of the pedal, when the opening degree of the throttle valve measured through the throttle position sensor 300 is greater than or equal to the reference opening degree, even though no object is detected around the accelerator pedal, it may be determined that the vehicle is moving rapidly.

When it is determined that the vehicle is currently rapidly starting, the controller 400 may control the sudden acceleration by rotating the electric motor 500 of the vehicle in a direction opposite to the direction in which the engine of the vehicle operates.

In this case, the control unit 400 may receive the engine torque according to the sudden start from the outside through CAN (Controller Area Network) communication and rotate the electric motor 500 with a torque equal to the engine torque.

For example, if it is determined that the current vehicle is rapidly starting, the controller 400 receives the engine torque of the current vehicle from an electronic device (not shown) for measuring the engine torque of the vehicle through CAN communication, and With the same torque, the electric motor 500 may be rotated in the opposite direction to the engine of the vehicle.

That is, the driving force generated by the engine of the vehicle is offset through the driving force generated by the electric motor 500 interworking with the engine, thereby controlling the sudden acceleration generated in the vehicle.

At this time, as the engine of the vehicle does not operate normally due to the rotation of the electric motor 500 , the engine start may be turned off and the sudden start may be stopped.

On the other hand, even after controlling the sudden acceleration by rotating the electric motor 500 in the opposite direction to the direction in which the engine operates, there may be a case in which sudden acceleration still occurs.

If sudden acceleration still occurs after rotating the electric motor 500 to control sudden acceleration, the control unit 400 blocks fuel supply for engine operation of the vehicle through the TCU (Transmission Control Unit) to control the sudden acceleration. .

For example, if sudden acceleration still occurs after rotating the electric motor 500 to control sudden acceleration, the control unit 400 cuts off fuel supply for engine operation of the vehicle through the TCU of the vehicle to turn off the engine start. can do it

The TCU may control the fuel supplied to the engine, and the control unit 400 may cut off the fuel supply for engine operation of the vehicle through the TCU provided in the vehicle to turn off the engine's starting, and the engine's starting is off. As a result, the vehicle loses driving power and the sudden acceleration situation ends.

According to an embodiment of the present invention, the controller 400 may stop the rotation of the electric motor 500 when the engine start of the vehicle is turned off as the electric motor 500 is rotated to control the sudden start.

For example, when the engine is turned off as the engine of the vehicle fails to operate normally due to the rotation of the electric motor 500 , the engine cannot generate a driving force for abrupt start anymore, so the controller 400 controls the sudden start situation. It is determined that this is finished, and the rotation of the electric motor 500 is stopped to restore the vehicle to a normal state.

According to an embodiment of the present invention, the controller 400 may generate an alarm to the driver of the vehicle when controlling the sudden start by rotating the electric motor 500 .

For example, the control unit 400 rotates the electric motor 500 to control sudden acceleration and at the same time provides an alarm to the driver of the vehicle notifying that the electric motor 500 is rotated to control sudden acceleration in the vehicle dashboard or vehicle It can be generated by using a built-in speaker.

2 is a first flowchart for explaining a method for preventing sudden acceleration for a hybrid vehicle according to an embodiment of the present invention, and FIG. 3 is a second flowchart for explaining a method for preventing sudden acceleration for a hybrid vehicle according to an embodiment of the present invention.

Referring to FIG. 2 , the method for preventing sudden acceleration for a hybrid vehicle according to an embodiment of the present invention may include detecting ( S100 ), determining ( S200 ), and controlling ( S300 ).

In the sensing step (S100), the accelerator position sensor 100 may detect the position of the accelerator pedal.

In the sensing step ( S100 ), the object detecting sensor 200 may identify whether an object exists around the accelerator pedal.

In the sensing step (S100), the throttle position sensor 300 may measure the acceleration state of the vehicle.

In the determining step ( S200 ), the controller 400 may determine whether sudden acceleration occurs based on at least one of the position of the accelerator pedal and whether an object exists around the accelerator pedal and the acceleration state of the vehicle.

Referring to FIG. 3 , the determining step (S200) includes determining whether the opening degree of the throttle valve exceeds the reference opening amount (S210), and determining whether the position of the accelerator pedal is less than the reference position (S220) , and determining whether an object exists around the accelerator pedal (S230).

In step S210 , the control unit 400 determines whether the opening degree of the throttle valve detected by the throttle position sensor 300 corresponds to a preset reference opening degree.

In case of sudden start, the opening degree of the throttle valve is measured to be greater than the standard opening amount (e.g., when the opening degree of the throttle valve is 100%). can be checked

In step S220, the controller 400 determines whether the position of the accelerator pedal is less than a preset reference position.

The reference position may be set when the position of the accelerator pedal is 99%, and is a criterion for judging whether the driver has fully depressed the accelerator pedal.

In general, when sudden acceleration occurs, the vehicle accelerates in the same state as when the accelerator pedal position is 100%. Therefore, even if the current accelerator pedal position is not 100%, if the throttle valve opening degree is measured to be 100%, the vehicle is accelerating to the maximum regardless of the driver's will, so it can be determined that the vehicle has accelerated. .

In step S230, the controller 400 determines whether an object exists around the accelerator pedal.

For example, if the opening degree of the throttle valve is measured to be greater than or equal to the standard opening degree even though the driver's body (eg, the driver's legs) does not exist around the accelerator pedal, the vehicle is physically unable to depress the accelerator pedal. Since the vehicle is accelerating to the maximum, it can be determined that the vehicle has accelerated.

Although the determining step ( S200 ) has been described as being performed in order as shown in FIG. 3 , according to another embodiment of the present invention, steps S220 and S230 may be performed in a different order.

According to another embodiment of the present invention, only steps S210 and S220 may be performed except for step S230, and only steps S210 and S230 may be performed except for step S220.

In the controlling step ( S300 ), the controller 400 may control the sudden acceleration by rotating the electric motor 500 of the vehicle in a direction opposite to the direction in which the engine of the vehicle operates in response to identifying the occurrence of sudden acceleration.

In the controlling step (S300), the control unit 400 may receive the engine torque according to the sudden start from the outside through CAN communication and rotate the electric motor 500 with a torque equal to the engine torque.

In the controlling step ( S300 ), the controller 400 may generate an alarm informing the driver of the vehicle that the sudden acceleration is controlled by rotating the electric motor 500 .

If sudden acceleration still occurs after rotating the electric motor 500 to control sudden acceleration, the control unit 400 blocks the fuel supply for engine operation of the vehicle through the TCU to control sudden acceleration (S400). can do.

The control unit 400 may further include a step ( S500 ) of stopping the rotation of the electric motor 500 when the engine start of the vehicle is turned off as the electric motor 500 is rotated to control the sudden start.

As described above, the apparatus and method for preventing sudden acceleration for a hybrid vehicle according to an embodiment of the present invention determine whether the vehicle accelerates rapidly based on acceleration information and whether objects around the accelerator pedal are detected, and when sudden acceleration occurs, the electric motor is installed in the vehicle. By rotating in the opposite direction to the engine, sudden start can be effectively controlled.

Implementations described herein may be implemented in, for example, a method or process, an apparatus, a software program, a data stream, or a signal. Although discussed only in the context of a single form of implementation (eg, only as a method), implementations of the discussed features may also be implemented in other forms (eg, in an apparatus or a program). The apparatus may be implemented in suitable hardware, software and firmware, and the like. A method may be implemented in an apparatus such as, for example, a processor, which generally refers to a computer, a microprocessor, a processing device, including an integrated circuit or programmable logic device, or the like. Processors also include communication devices such as computers, cell phones, portable/personal digital assistants ("PDAs") and other devices that facilitate communication of information between end-users.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary and those of ordinary skill in the art to which the art pertains are aware that various modifications and equivalent other embodiments are possible therefrom. will understand Accordingly, the true technical protection scope of the present invention should be defined by the following claims.

100: Excel position sensor
200: object detection sensor
300: throttle position sensor
400: control unit
500: electric motor

Claims (12)

an accelerator position sensor for detecting the position of the accelerator pedal;
an object detection sensor provided on the accelerator pedal to identify whether an object exists around the accelerator pedal;
a throttle position sensor for detecting an opening degree of the throttle valve; and
It is determined whether sudden acceleration has occurred based on at least one of the position of the accelerator pedal and whether there is an object around the accelerator pedal and the amount of opening of the throttle valve, and in response to identifying the occurrence of sudden acceleration, the vehicle's electricity A control unit for controlling the sudden start by rotating the motor in a direction opposite to the direction in which the engine of the vehicle operates;
The control unit may be configured to include, when an opening degree of the throttle valve sensed through the throttle position sensor is greater than or equal to a reference opening degree and a position of the accelerator pedal sensed through the accelerator position sensor is less than a reference position, or a throttle detected through the throttle position sensor The apparatus for preventing sudden acceleration for a hybrid vehicle, characterized in that it is determined that the sudden acceleration has occurred when the valve opening degree is greater than or equal to the reference opening degree and when it is identified that there is no object around the accelerator pedal through the object detection sensor.
The method of claim 1,
The object detection sensor, a hybrid vehicle sudden departure prevention device, characterized in that it comprises at least one of an ultrasonic sensor and an infrared sensor.
The method of claim 1,
wherein the control unit receives the engine torque according to the sudden acceleration from the outside through CAN communication and rotates the electric motor with a torque equal to the engine torque.
The method of claim 1,
When the sudden acceleration still occurs after rotating the electric motor to control the sudden acceleration, the control unit blocks the fuel supply for operating the engine of the vehicle through a TCU (Transmission Control Unit) to control the sudden acceleration A device for preventing sudden acceleration for hybrid vehicles.
The method of claim 1,
Wherein the control unit rotates the electric motor to control the sudden start, and when the engine of the vehicle is turned off, the controller stops the rotation of the electric motor.
The method of claim 1,
wherein the control unit rotates the electric motor to generate an alarm informing a driver of the vehicle that sudden acceleration is being controlled.
detecting, by the accelerator position sensor, the position of the accelerator pedal;
identifying, by an object detection sensor, whether an object exists around the accelerator pedal;
detecting, by the throttle position sensor, an opening degree of the throttle valve;
determining, by a controller, whether sudden acceleration occurs based on at least one of a position of the accelerator pedal and whether an object exists around the accelerator pedal, and an opening degree of the throttle valve; and
and controlling, by the control unit, the sudden acceleration by rotating the electric motor of the vehicle in a direction opposite to the direction in which the engine of the vehicle operates in response to identifying the occurrence of the sudden acceleration.
In the determining step, the control unit,
When the opening degree of the throttle valve detected by the throttle position sensor is greater than or equal to the reference opening amount and the position of the accelerator pedal detected by the accelerator position sensor is less than the reference position, or the opening amount of the throttle valve detected by the throttle position sensor is The method for preventing sudden acceleration for a hybrid vehicle, characterized in that it is determined that the sudden acceleration has occurred when it is greater than the reference opening degree and when it is identified that there is no object around the accelerator pedal through the object detection sensor.
8. The method of claim 7,
The object detection sensor includes at least one of an ultrasonic sensor and an infrared sensor.
The method of claim 7, wherein in the controlling step,
The control unit receives the engine torque according to the sudden acceleration from the outside through CAN communication, and rotates the electric motor with a torque equal to the engine torque.
8. The method of claim 7,
When the sudden acceleration still occurs after the control unit rotates the electric motor to control the sudden acceleration, controlling the sudden acceleration by blocking fuel supply for operating the engine of the vehicle through a TCU (Transmission Control Unit) ; A method for preventing sudden acceleration for a hybrid vehicle, characterized in that it further comprises.
8. The method of claim 7,
and stopping the rotation of the electric motor when the engine of the vehicle is turned off as the controller rotates the electric motor to control sudden acceleration.
The method of claim 7, wherein in the controlling step,
wherein the control unit rotates the electric motor to generate an alarm informing a driver of the vehicle that sudden acceleration is being controlled.

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