KR102300211B1 - Driving control device and method for improving safety performance of small electric vehicles - Google Patents

Abstract

The present disclosure relates to a driving control device and method for improving safety performance. Specifically, it is possible to continue safe driving by identifying the state of each sub-system and the power system installed in an ultra-small electric vehicle, the driving state, and the dangerous state level of the vehicle. It relates to a driving control device and method for A driving control device and method for a micro electric vehicle according to an embodiment is a vehicle controller (VCU, Vehicle Control Unit), an EV (Electric Vehicle) driving motor, HSG (Hybrid Starter and Generator) that collectively controls vehicle driving and an electric power system System and in-wheel motor system (IN-WHEEL MOTOR SYSTEM); Considering the state of the power system and various subsystems, respectively, and analyzing the vehicle driving state and dangerous driving signal, perform limited driving or perform electric driving according to the analysis result By shutting off the power, it is possible to improve the safety performance.

Description

DRIVING CONTROL DEVICE AND METHOD FOR IMPROVING SAFETY PERFORMANCE OF SMALL ELECTRIC VEHICLES

The present disclosure relates to a driving control device and method for improving safety performance. Specifically, it is possible to continue safe driving by identifying the state of each sub-system and the power system installed in an ultra-small electric vehicle, the driving state, and the dangerous state level of the vehicle. It relates to a driving control device and method for

Unless otherwise indicated herein, the material described in this section is not prior art to the claims of this application, and inclusion in this section is not an admission that it is prior art.

An electric vehicle is a vehicle that uses an electric motor driven by electricity. This is in contrast to an ordinary car driven by an internal combustion engine that uses fossil fuels such as gasoline, diesel, and natural gas. BACKGROUND ART An electric vehicle is a vehicle driven by rolling wheels with an electric motor, and is distinguished from an ordinary vehicle that moves by moving a piston by exploding a mixture of air and fossil fuels such as gasoline, diesel, and natural gas in an internal combustion engine. Electric vehicles are also divided into electric vehicles that can travel at high speed over long distances on highways and neighborhood electric vehicles that mainly drive in cities at low speeds. Electricity, which is the power source of an electric motor, is obtained from a solar cell or a charged storage battery. In general, an electric vehicle means a battery electric vehicle that obtains energy from a storage battery loaded in the vehicle. On the other hand, there are hybrid cars that have both an electric motor driven by a capacitor and an internal combustion engine and operate the internal combustion engine to partially charge the capacitor when needed, and there are electric cars that have the function of charging the battery when decelerating.

The energy efficiency of an electric vehicle can be said to be the ratio of the energy used to charge the storage battery and the energy used to drive the vehicle among them. It is significantly higher than the energy efficiency of the purchased gasoline car. Also, the cost of purchasing the electrical energy required to travel a certain distance is much lower than the cost of purchasing the fossil fuel required to travel the same distance.

However, from the user's point of view, electric vehicles have many disadvantages compared to ordinary vehicles. First of all, since the purchase price of an electric vehicle is higher than that of a normal vehicle, the consumer must comprehensively consider the purchase price, maintenance costs such as energy purchase cost and repair cost required for operation, and the life of the vehicle. In addition, although electric vehicles are rapidly improving in terms of driving convenience, such as the maximum speed that a car can achieve, the distance that can be driven after a single charge, the time it takes to charge, the accessibility of a charging station, and safe driving performance, It is still lacking compared to a normal car.

1. Korean Patent Publication No. 10-0460886 (2004.12.01)

A driving control device and method for a micro electric vehicle according to an embodiment is a vehicle controller (VCU, Vehicle Control Unit), an EV (Electric Vehicle) driving motor, HSG (Hybrid Starter and Generator) that collectively controls vehicle driving and an electric power system System and in-wheel motor system (IN-WHEEL MOTOR SYSTEM); each considers the state of the power system and various subsystems, analyzes the vehicle driving state and dangerous driving signal, and performs limited driving or electric power according to the analysis result By shutting off the power, it is possible to improve the safety performance.

The driving control device for improving the safety performance of an ultra-small electric vehicle according to the embodiment collects state information and input/output signals from the vehicle controller and the sub-systems installed in the vehicle at the initial stage of power-on, and the state of the VCU (Vehicle Control Unit) and the sub-systems VCU (Vehicle Control Unit) state determination module for determining each; a power system state determination module that collects initial state information from the electric power system of the vehicle and determines the state of the vehicle high voltage system; a driving state determination module that collects the driver's vehicle operation information, driving information, and vehicle surroundings monitoring information to determine the vehicle driving state and driving state; and a safety driving module that performs limited driving according to the driving state and the amount of change in driving information, and determines whether to cut off electric power when a dangerous driving signal including door open driving, driving without a driver, and driving while charging is detected; includes

In the driving control method for improving the safety performance of an ultra-small electric vehicle according to another embodiment, (A) the driving control device collects state information and input/output signals from the vehicle controller and the sub-systems installed in the vehicle at the initial stage of power-on, and collects the VCU and the sub determining the status of each of the systems; (B) determining, by the driving control device, the state of the vehicle high voltage system by collecting initial state information from the electric power system of the vehicle; (C) the driving control device collects the driver's vehicle operation information, driving information, and vehicle surrounding monitoring information to determine the vehicle driving state and driving state; and (D) the driving control device performs limited driving according to the driving state and the amount of change in driving information, and when a dangerous driving signal including door open driving, driving without a driver, and driving while charging is detected, whether to cut off electric power determining; includes

As described above, the driving control apparatus and method for a miniature electric vehicle prevent malfunctions and malfunctions of the electric vehicle by enabling the initial signal to quickly identify the abnormality of each of various subsystems and power systems installed in the electric vehicle.

In addition, by detecting various dangerous driving signals in various dangerous situations, such as driving while charging, driving without a driver, and driving with the door open, driving is restricted accordingly to ensure the driving stability of the electric vehicle.

By calculating the dangerous state level of the vehicle based on the driving control signal including the control signal change amount, the speed change amount, and the braking signal input period and the vehicle surroundings monitoring information, and supplying power accordingly, the dangerous state of the vehicle is determined more accurately. It relieves the driver's discomfort caused by excessive safety driving functions during actual driving.

It should be understood that the effects of the present invention are not limited to the above-described effects, and include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a view showing an electric vehicle system according to an embodiment;
2 is a view showing the configuration of data processing of the driving control device according to the embodiment;
3 is a view showing a data processing block of the safe driving module according to the embodiment;
4 is a data processing flow chart for driving control for improving safety performance of an ultra-small electric vehicle according to an embodiment;
5 is a flowchart illustrating in more detail a driving control process according to the embodiment;

Advantages and features of the present invention, and a method for achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains. It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

In describing the embodiments of the present invention, if it is determined that a detailed description of a well-known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the terms to be described later are terms defined in consideration of functions in an embodiment of the present invention, which may vary according to intentions or customs of users and operators. Therefore, the definition should be made based on the content throughout this specification.

1 is a view showing an electric vehicle system according to an embodiment.

1 , the electric vehicle system according to the embodiment includes a vehicle control unit (VCU), a battery management system (BMS), a power distribution unit (PDU), and a charging circuit ( OBC, On Board Charger), a converter (LDC, Low-Side DC/DC Converter), an inverter, a motor control unit (MCU, Motor Control Unit), a motor (M), may be configured including a reducer and a brake. In the embodiment, the battery, the power distribution device, the charging circuit, the converter and the motor are connected by electric power, and the reducer and the brake are controlled by mechanical power by the motor.

The apparatus and method for controlling the driving of an ultra-small electric vehicle according to the embodiment prevent malfunctions and breakdowns of the electric vehicle by enabling the initial signal to quickly determine whether each of various sub-systems and power systems installed in the electric vehicle is abnormal. In addition, by detecting various dangerous driving signals in various dangerous situations, such as driving while charging, driving without a driver, and driving with the door open, driving is restricted accordingly to ensure the driving stability of the electric vehicle.

2 is a diagram showing the configuration of data processing of the driving control device according to the embodiment.

Referring to FIG. 2 , the driving control device 100 according to the embodiment includes a VCU determination module 110 , a power system state determination module 130 , a driving state determination module 150 and a safe driving module 170 . can be configured. As used herein, the term 'module' should be construed to include software, hardware, or a combination thereof, depending on the context in which the term is used. For example, the software may be machine language, firmware, embedded code, and application software. As another example, the hardware may be a circuit, a processor, a computer, an integrated circuit, an integrated circuit core, a sensor, a Micro-Electro-Mechanical System (MEMS), a passive device, or a combination thereof.

The VCU state determination module 110 collects state information and input/output signals from the vehicle controller and sub-systems installed in the vehicle at the initial stage of power-on, and determines the states of the VCU (Vehicle Control Unit) and the sub-systems, respectively. The VCU state determination module 110 according to the embodiment includes a vehicle control unit (VCU), a battery management system (BMS), and a motor control unit (MCU) that collectively control the vehicle driving and the electric power system. ), a DCDC converter (LDC), and a low-speed charger collect input/output signals, initial state information, and subsystem control signals from each of the subsystems to determine the state of each subsystem installed in the vehicle.

The power system state determination module 130 collects initial state information from the electric power system of the vehicle to determine the state of the vehicle high voltage system. The high voltage system according to the embodiment includes an electric vehicle (EV) driving motor, a hybrid electric vehicle (HEV) driving motor, a hybrid starter and generator (HSG), and an in-wheel motor system (IN-WHEEL MOTOR SYSTEM); It may be composed of

The EV drive motor is installed in the engine room in the form of a reducer and a module to replace the engine of an internal combustion engine vehicle, and the HEV drive motor is installed between the engine and the transmission and drives the vehicle in the low-speed, high-torque range.

The HSG (Hybrid Starter and Generator) starts the hybrid vehicle's engine and charges the high-voltage battery, and assists the engine power during acceleration, and the IN-WHEEL MOTOR SYSTEM installs an electric motor inside each wheel to independently drive and brake. The power system determination module analyzes the initial state information and input/output signals of the state of the power system and the high voltage system to determine the operating state and failure of each power system component.

The driving state determination module 150 collects the driver's vehicle operation information, driving information, and vehicle surrounding monitoring information to determine the vehicle driving state and driving state. For example, the driving state determination module 150 includes vehicle driving information including speed, driving direction, location, and movement path, input period of a signal input by the driver, vehicle speed change amount, vehicle control signal change rate, and vehicle surroundings monitoring information according to the driving condition.

The safe driving module 170 performs limited driving according to the driving state and the amount of change in driving information, and determines whether to cut off electric power when a dangerous driving signal including door open driving, driving without a driver, and driving while charging is detected do.

3 is a view showing a data processing block of the safe driving module according to the embodiment.

Referring to FIG. 3 , the safe driving module 170 may include an analysis unit 171 , a calculation unit 173 , and a determination unit 175 . The analysis unit 171 analyzes data received from the VCU state determination module 110 , the power system state determination module 130 , and the driving state determination module 150 . For example, the analysis unit 171 of the safe driving module 170 analyzes the state determination result of the vehicle subsystem and the power system and the vehicle driving state information. In an embodiment, the vehicle driving state may be identified through image data analysis information obtained from sensors and cameras installed in the vehicle. In an embodiment, the analysis unit 171 analyzes the distance between the near object and the vehicle and the movement of the near object in the acquired image data to determine the driving state of the vehicle. In addition, the analysis unit 171 may analyze the driving state by grasping the real-time location, moving route, and traffic state information of the vehicle.

The calculation unit 173 calculates the risk level and driving risk level of the vehicle state through the data analysis result of the analysis unit 171 . As for the risk level of the vehicle state, it is possible to calculate the risk level according to the battery charge amount when the remaining battery amount or the charge rate is less than a certain level by grasping the vehicle state information necessary for safe driving, such as the remaining battery amount and the charge amount. In addition, in the embodiment, the calculator 173 calculates the driving state and the risk level of each of the subsystems according to the determined driving state, and when the risk level exceeds a certain level, limits vehicle driving, and the dangerous driving signal is longer than a certain time If it is continuously detected, the electric power can be cut off. In addition, the calculator 173 calculates the risk level according to the duration of the dangerous driving time to limitly drive the vehicle or to cut off the power supplied to the vehicle according to the calculated risk level.

In addition, the calculator 173 detects dangerous states such as sudden deceleration, acceleration and collision, door open driving, driverless driving, and driving while charging, and calculates the duration of the dangerous state to determine the risk level according to the duration. can be calculated. For example, the calculator 173 warns with an alarm when door open driving or driving while charging the battery or motor occurs for a first set time, and when the warning continues for a second set time, limited driving or vehicle power cut off process, etc.

The determination unit 175 determines limited operation or power cut off according to the calculated dangerous state and the duration of the dangerous state. For example, when the determination unit 175 determines a dangerous state due to a minor accident such as a collision through driving information and vehicle state information, an automatic vehicle control process for driver safety such as emergency stop and automatic control of emergency lights starts. . In addition, the determination unit 175 limits the vehicle power or blocks the vehicle power according to the level of danger during driving determined according to the duration of the dangerous state. For example, the determination unit 175 determines the type of the dangerous state, determines the driving limit or the power cutoff according to the calculated risk level in consideration of the duration of the identified dangerous state, and reflects it in the vehicle driving control.

Hereinafter, a driving control method for improving safety performance will be described in turn. Since the operation (function) of the driving control method according to the embodiment is essentially the same as the function of the driving control device and the system, the description overlapping with FIGS. 1 to 3 will be omitted.

4 is a data processing flowchart for driving control for improving safety performance of an ultra-small electric vehicle according to an embodiment.

Referring to FIG. 4 , in step S410 , the driving control device collects state information and input/output signals from the vehicle controller and sub-systems installed in the vehicle at the initial stage of power-on, and determines the states of the VCU and the sub-systems, respectively.

In step S430, the driving control device collects initial state information from the electric power system of the vehicle and determines the state of the vehicle high voltage system.

In step S450, the driving control device collects the driver's vehicle operation information, driving information, and monitoring information around the vehicle to determine the vehicle driving state and driving state.

In step S470, the driving control device performs limited driving according to the driving state and the amount of change in driving information, and determines whether to cut off the electric power when a dangerous driving signal including door open driving, driving without a driver, and driving while charging is detected do.

5 is a flowchart illustrating in more detail a driving control process according to an embodiment.

In step S510, the safe driving module analyzes the control system signal.

In step S520, it is determined whether the signal and state of the control system analyzed by the safe driving module are normal. When the signal and status of the control system are normal, the system goes to step S530 to collect the initial state information of the electric power system. Analyze system errors.

In step S540, it is determined whether the initial state of the electric power system is normal, and if it is normal, the state of the power system is determined in step S550. If the initial state of the electric power system is not normal in step S540, the process proceeds to step S541 to analyze an error in the initial state of the power system. If the initial state of the electric power system is normal in step S540, the process proceeds to step S550 to determine the state of the power system.

In step S560, driving information and driver input signals are analyzed. In an embodiment, the driving information may be grasped through monitoring information on the main surface of the vehicle, real-time location information, and traffic condition information obtained from a camera and a sensor installed in the vehicle. For example, the driving information may be identified based on the distance data between the surrounding object information and the surrounding objects extracted from the vehicle surrounding monitoring information. In addition, in the embodiment, the driver input signal analysis is performed by analyzing the type of the control signal input by the driver and the time and period at which the input signal is generated. Specifically, when the driver inputs a brake signal, the brake input angle and input timing and period are identified, and the amount of change in driving information of the vehicle in response to the driver's input of the control signal is determined. Specifically, when the brake signal input period is less than the set value or the deceleration or acceleration range exceeds the set value, the risk level can be raised.

In step S570, if it is determined that the amount of change in driving information is less than the threshold value, the operation proceeds to step S580 to continue normal driving. The driving limit according to the embodiment may include speed limit, deceleration, emergency stop, and the like. After the driving restriction, the safe driving module continuously monitors driving information to determine whether the duration of the dangerous driving signal exceeds a certain time in step S600. In the embodiment, charging driving, driving with the door open, driving without a driver, etc. are identified as dangerous driving signals. If the duration of the operation according to the embodiment exceeds a certain time, it enters step S610 and cuts off the power to stop the driving, and if the dangerous driving signal is less than the duration, it enters again to step S550 and changes the power system state. judge

As described above, the driving control apparatus and method for a miniature electric vehicle prevent malfunction and failure of the electric vehicle by quickly identifying the abnormality of each of various subsystems and power systems installed in the electric vehicle by an initial signal.

In addition, it detects various dangerous driving signals, such as driving while charging, driving without a driver, and driving with the door open, and restricts driving accordingly to ensure driving stability of electric vehicles.

The driving control apparatus and method for improving the safety performance of an ultra-small electric vehicle according to the embodiment calculates the dangerous state level of the vehicle by the driving control signal including the control signal change amount, the speed change amount, and the braking signal input period and the vehicle surroundings monitoring information And by supplying power in a limited manner, the dangerous state of the vehicle is more accurately determined and the driver's discomfort caused by excessive safe driving functions during actual driving is resolved.

The disclosed content is merely an example, and can be variously changed and implemented by those of ordinary skill in the art without departing from the gist of the claims claimed in the claims, so the protection scope of the disclosed content is limited to the specific It is not limited to an Example.

Claims (10)

In the driving control device for improving the safety performance of an ultra-small electric vehicle,
a VCU (Vehicle Control Unit) state determination module that collects state information and input/output signals from the vehicle controller and sub-systems installed in the vehicle at the initial stage of power-on, and determines the states of the VCU (Vehicle Control Unit) and the sub-systems, respectively;
a power system state determination module that collects initial state information from the electric power system of the vehicle and determines the state of the vehicle high voltage system;
a driving state determination module that collects the driver's vehicle operation information, driving information, and vehicle surroundings monitoring information to determine the vehicle driving state and driving state;
a safety driving module that performs limited driving according to driving conditions and changes in driving information, and determines whether to cut off electric power when a dangerous driving signal including door open driving, driving without a driver, and driving while charging is detected; A driving control device comprising a.
According to claim 1, wherein the VCU state determination module; silver
From each of the subsystems installed in the vehicle including the vehicle control unit (VCU), the battery management system (BMS), the motor control unit (MCU), the DCDC converter (LDC), and the low-speed charger that collectively control the vehicle driving and electric power system The driving control device, characterized in that by collecting input/output signals and control signals to determine the state of each of the subsystems.
The method of claim 1, wherein the power system state determination module;
an EV driving motor installed in the engine room in the form of a reducer and a module to serve as power in place of the engine of an internal combustion engine vehicle; an HEV driving motor mounted between the engine and the transmission and driving the vehicle in a low-speed, high-torque range; HSG (Hybrid Starter and Generator) that starts the engine of a hybrid vehicle and charges the high-voltage battery, and assists the engine power during acceleration; and an in-wheel motor system (IN-WHEEL MOTOR SYSTEM) that independently drives and brakes by mounting an electric motor inside each wheel of the vehicle; A driving control device, characterized in that the determination is made for each of the elements.
The method of claim 1, wherein the driving state determination module;
It is characterized in that the driving state is determined according to vehicle driving information including speed, driving direction, location, and movement route, the input period of a signal input by the driver, the amount of speed change of the vehicle, the rate of change of the vehicle control signal, and monitoring information around the vehicle. driving control device.
According to claim 1, The safe driving module; silver
According to the determined driving state, the driving state and the risk level of each sub-system are calculated, vehicle driving is restricted when the risk level exceeds a certain level, and when the dangerous driving signal is continuously detected for a certain period of time or more, electric power is supplied Driving control device, characterized in that blocking.
In the driving control method for improving the safety performance of an ultra-small electric vehicle,
(A) the driving control device collects state information and input/output signals from the vehicle controller and sub-systems installed in the vehicle at the initial stage of power-up, and determining the states of the VCU and the sub-systems, respectively;
(B) determining, by the driving control device, the state of the vehicle high voltage system by collecting initial state information from the electric power system of the vehicle;
(C) the driving control device collects the driver's vehicle operation information, driving information, and vehicle surrounding monitoring information to determine the vehicle driving state and driving state;
(D) The driving control device performs limited driving according to the driving status and the amount of change in driving information, and determines whether to cut off the electric power when a dangerous driving signal including door open driving, driving without a driver, and driving while charging is detected to do; A driving control method comprising a.
The method of claim 6, wherein the step of (A);
Input/output signals and control signals from each of the subsystems including the vehicle controller (VCU), battery management system (BMS), motor controller (MCU), DCDC converter (LDC), and low-speed charger that collectively control vehicle driving and electric power system A driving control method, characterized in that by collecting and determining the state of each of the subsystems.
The method of claim 6, wherein the step of (B);
an EV driving motor installed in the engine room in the form of a reducer and a module to serve as power in place of the engine of an internal combustion engine vehicle; an HEV driving motor mounted between the engine and the transmission and driving the vehicle in a low-speed, high-torque range; HSG (Hybrid Starter and Generator) that starts the engine of a hybrid vehicle and charges the high-voltage battery, and assists the engine power during acceleration; and an in-wheel motor system (IN-WHEEL MOTOR SYSTEM) that independently drives and brakes by mounting an electric motor inside each wheel of the vehicle; A driving control method, characterized in that the determination is made for each element.
The method of claim 6, wherein the step (C); Is
It is characterized in that the driving state is determined according to vehicle driving information including speed, driving direction, location, and movement route, the input period of a signal input by the driver, the amount of speed change of the vehicle, the rate of change of the vehicle control signal, and monitoring information around the vehicle. driving control method.
The method of claim 6, wherein the step (D); Is
According to the determined driving state, the driving state and the risk level of each sub-system are calculated, vehicle driving is restricted when the risk level exceeds a certain level, and when the dangerous driving signal is continuously detected for a certain period of time or more, electric power is supplied A driving control method, characterized in that blocking.

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