KR20230136795A - Vehicle control apparatus and method for improving fuel efficiency - Google Patents

Abstract

A vehicle control device for controlling a vehicle according to an embodiment of the present invention includes a driving unit including at least one of a motor or an engine, a storage unit storing first energy ratio parameters of the driving unit, and a processor electrically connected to the storage unit. It can be included. The processor identifies second energy ratio parameters of the drive unit according to driving information of the vehicle, and when the state of the vehicle corresponds to a specified condition, identifies a first parameter included in the first energy ratio parameters, and Identify a second parameter included in the second energy ratio parameters and corresponding to the first parameter, and if a difference between the ratio of the first parameter and the ratio of the second parameter is greater than or equal to a threshold ratio, then the difference is the threshold ratio. The driving unit is controlled to be below a threshold ratio, and the specified condition may include a state in which the vehicle is in an autonomous driving state or a change in the driving speed of the vehicle is below a specified ratio.

Description

Vehicle control device and method for improving fuel efficiency {VEHICLE CONTROL APPARATUS AND METHOD FOR IMPROVING FUEL EFFICIENCY}

The present invention relates to a vehicle control device and method for improving fuel efficiency, and more specifically, to a vehicle control device and method for improving fuel efficiency using a method of tracking a reference energy ratio.

One way to improve vehicle performance is to improve vehicle fuel efficiency. Fuel efficiency of a vehicle generally tends to increase when the vehicle is driven at a constant speed. In contrast, when the speed of the vehicle changes rapidly, the fuel efficiency of the vehicle tends to decrease. In general, when the calibration value determined when evaluating the fuel efficiency of a vehicle is applied to each driving unit, the vehicle can be driven with optimal fuel efficiency.

Recently, as vehicle sales for plug-in hybrid electric vehicles (PHEV), hybrid electric vehicles (HEV), or electric vehicles (EV) have increased, technology development related to improving fuel efficiency of vehicles is being actively conducted to increase driving range.

Embodiments of the present invention are intended to provide a vehicle control device and method for improving fuel efficiency using a method of tracking an energy rate reference.

The 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 description below.

A vehicle control device for controlling a vehicle according to an embodiment of the present invention includes a driving unit including at least one of a motor or an engine, a storage unit storing first energy ratio parameters of the driving unit, and a processor electrically connected to the storage unit. It can be included. The processor identifies second energy ratio parameters of the drive unit according to driving information of the vehicle, and when the state of the vehicle corresponds to a specified condition, identifies a first parameter included in the first energy ratio parameters, and Identify a second parameter included in the second energy ratio parameters and corresponding to the first parameter, and if a difference between the ratio of the first parameter and the ratio of the second parameter is greater than or equal to a threshold ratio, then the difference is the threshold ratio. The driving unit is controlled to be below a threshold ratio, and the specified condition may include a state in which the vehicle is in an autonomous driving state or a change in the driving speed of the vehicle is below a specified ratio.

In one embodiment, the first energy rate parameter further includes a third parameter, and the second energy rate parameter further includes a fourth parameter corresponding to the third parameter, and the processor: Identifying a first ratio difference corresponding to a difference between the ratio of the first parameter and the ratio of the second parameter, and identifying a second ratio difference corresponding to the difference between the ratio of the third parameter and the fourth parameter, and , Comparing the first ratio difference and the second ratio difference, and if the first ratio difference is greater than the second ratio difference, controlling the driver so that the first ratio difference is less than or equal to the threshold ratio to set the second parameter The ratio of , and when the second ratio difference is greater than the first ratio difference, the ratio of the fourth parameter can be changed by controlling the driver so that the second ratio difference is less than or equal to the threshold ratio.

In one embodiment, the processor determines priority according to the size of the ratio difference based on the comparison of the first ratio difference and the second ratio difference, and based on the priority, Controlling the driving unit so that the ratio difference of relatively high priority takes precedence over the ratio difference of relatively low priority and is below the threshold ratio, and controlling the driving unit so that the ratio difference of relatively low priority is below the threshold ratio. can do.

In one embodiment, the second parameter may include the driving information of the vehicle collected during a designated period.

In one embodiment, when the driving unit includes the motor, the first energy ratio parameters and the second energy ratio parameters include driving energy of the motor, regenerative energy of the motor, and load shift of the motor ( rod shift) energy, power generation energy of the motor, or starting energy of the motor.

In one embodiment, the processor is at least one of an engine control unit (ECU), a motor control unit (MCU) included in the vehicle, or a vehicle network (controller area network, CAN) of the vehicle. The driving information can be received from one.

In one embodiment, the driving information may include at least one of torque of the engine, rounds per minute (RPM) of the engine, torque of the motor, or rotations per minute of the motor. .

In one embodiment, the first energy ratio parameters may be set to have a fuel efficiency of the vehicle within a specified range under the specified conditions.

In the vehicle control method according to an embodiment of the present invention, identifying second energy ratio parameters of the driving unit according to driving information of the vehicle, and if the state of the vehicle corresponds to a specified condition, the first energy ratio of the driving unit identifying a first parameter included in the parameters and identifying a second parameter included in the second energy ratio parameters and corresponding to the first parameter, and a ratio of the first parameter to the second parameter. If the difference in ratio is more than the threshold ratio, controlling the driving unit so that the difference is less than the threshold ratio, and the specified condition is that the vehicle is in an autonomous driving state or a change in the driving speed of the vehicle is specified. It may include states where the ratio is below the ratio.

In one embodiment, the first energy rate parameter further includes a third parameter, and the second energy rate parameter further includes a fourth parameter corresponding to the third parameter, and the vehicle control method includes: identifying a first ratio difference corresponding to a difference between the ratio of the first parameter and the ratio of the second parameter, and generating a second ratio difference corresponding to the difference between the ratio of the third parameter and the fourth parameter. Identifying, comparing the first ratio difference and the second ratio difference, if the first ratio difference is greater than the second ratio difference, controlling the driver so that the first ratio difference is less than or equal to the threshold ratio. Changing the ratio of the second parameter, and when the second ratio difference is greater than the first ratio difference, controlling the driver so that the second ratio difference is less than or equal to the threshold ratio to change the ratio of the fourth parameter. Additional steps may be included.

In one embodiment, the first energy rate parameter further includes a third parameter, and the second energy rate parameter further includes a fourth parameter corresponding to the third parameter, and the vehicle control method includes: Identifying a first ratio difference corresponding to a difference between the ratio of the first parameter and the ratio of the second parameter, identifying a second ratio difference corresponding to the difference between the ratio of the third parameter and the fourth parameter. A step of comparing the first rate difference and the second rate difference and determining priority according to the size of the rate difference. Based on the priority, the rate difference of a relatively high priority is relatively high. The method may further include controlling the driving unit so that the ratio difference of low priority is below the threshold ratio, and controlling the driving unit so that the ratio difference of relatively low priority is below the threshold ratio.

In one embodiment, the second parameter may include the driving information of the vehicle collected during a designated period.

In one embodiment, when the driving unit includes a motor, the first energy rate parameters and the second energy rate parameters include driving energy of the motor, regenerative energy of the motor, and load shift (rod) of the motor. shift) energy, power generation energy of the motor, or starting energy of the motor.

In one embodiment, the vehicle control method includes an engine control unit (ECU), a motor control unit (MCU) included in the vehicle, or a vehicle network (controller area network, CAN) of the vehicle. The method may further include receiving the driving information from at least one of the following.

In one embodiment, the driving information may include at least one of engine torque, rounds per minute (RPM) of the engine, torque of a motor, or number of revolutions per minute of the motor.

In one embodiment, the first energy ratio parameters may be set to have a fuel efficiency of the vehicle within a specified range under the specified conditions.

This technology controls the drive unit so that the difference between the ratio of the energy parameters calculated according to the driving information of the drive unit and the reference ratio of the energy parameters measured in the vehicle's fuel efficiency evaluation stage is below the critical ratio, thereby reducing the vehicle's fuel efficiency over time. can be gradually improved.

In addition, this technology increases the degree to which the vehicle's fuel efficiency is improved per unit time by sequentially controlling the ratio of energy parameters in the order in which the difference between the ratio of the energy parameter and the reference ratio of the energy parameter is large (e.g. priority). You can do it.

In addition, various effects that can be directly or indirectly identified through this document may be provided.

1 is a block diagram showing a vehicle control device for improving fuel efficiency according to an embodiment of the present invention.
Figure 2 is a diagram showing a reference energy ratio for improving fuel efficiency according to an embodiment of the present invention.
Figure 3 is a diagram showing control of energy ratio according to an embodiment of the present invention.
Figure 4 is a diagram showing a control method for energy parameters according to an embodiment of the present invention.
Figure 5 is a diagram showing a control method for energy parameters according to an embodiment of the present invention.
Figure 6 is a diagram showing a vehicle control method for improving fuel efficiency of the present invention.
Figure 7 shows a computing system according to one embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through illustrative drawings. When adding reference numerals to components in each drawing, it should be noted that identical components are given the same reference numerals as much as possible even if they are shown in different drawings. Additionally, when describing embodiments of the present invention, if detailed descriptions of related known configurations or functions are judged to impede understanding of the embodiments of the present invention, the detailed descriptions will be omitted.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, sequence, or order of the component is not limited by the term. Additionally, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted in an ideal or excessively formal sense unless explicitly defined in the present application. No.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 7.

Figure 1 is a block diagram showing a vehicle control device 100 for improving fuel efficiency according to an embodiment of the present invention.

Referring to FIG. 1 , a vehicle control device 100 for improving fuel efficiency according to an embodiment may include a driving unit 110, a processor 120, and a storage unit 130. At least one of the driving unit 110, the processor 120, or the storage unit 130 may be electrically or communicatively connected. For example, the driver 110, processor 120, and storage unit 130 may be set to transmit and receive signals through at least one of a wired connection or a wireless connection.

The driving unit 110 may include at least one of the engine unit 111 or the motor unit 113. For convenience of explanation, the motor unit 113 is shown as one configuration, but the motor unit 113 may include a plurality of motor units. According to one embodiment, the driving unit 110 may not include the engine unit 111. For example, when the vehicle is an electric vehicle (EV), the driving unit 110 may include the motor unit 113 rather than the engine unit 111. According to another embodiment, the driving unit 110 may include an engine unit 111 and one or more motor units.

The engine unit 111 can generate power necessary for the vehicle. The engine unit 111 may transmit the generated power to the vehicle's power transmission device (not shown). The motor unit 113 can convert power stored in a battery (not shown) into power. The motor unit 113 may transmit the generated power to the vehicle's power transmission device (not shown).

The storage unit 130 may store vehicle driving information (e.g., engine torque per hour, engine RPM per hour, motor torque per hour, or motor RPM per hour) of the vehicle collected through the vehicle control device 100.

The storage unit 130 may store the energy ratio identified based on the vehicle's driving information and the reference energy ratio identified (or measured) at the time of evaluating the vehicle's fuel efficiency. A set containing information about the ratio of each of a plurality of energy parameters may be referred to as an “energy ratio.” A set containing information about the reference ratio of each of a plurality of energy parameters may be referred to as a “reference energy ratio.” Energy parameters may correspond to indicators identified (or calculated) based on the vehicle's driving information and the vehicle's status (e.g., drive, regeneration, load shift, power generation, and/or start). A detailed description of the energy ratio, reference energy ratio, and energy parameters will be described later in FIG. 2.

The storage unit 130 has a flash memory type, hard disk type, micro type, and card type (e.g., SD card (Secure Digital Card) or XD card (eXtreme Digital Memory such as RAM (Random Access Memory), SRAM (Static RAM), ROM (Read-Only Memory), PROM (Programmable ROM), EEPROM (Electrically Erasable PROM), and magnetic memory (MRAM) , Magnetic RAM, magnetic disk, and optical disk type memory.

The processor 120 may be electrically or functionally connected to the driving unit 110 and the storage unit 130. The processor 120 may execute software to control at least one other component of the vehicle control device 100 connected to the processor 120 and may perform various data processing or calculations. As at least part of the data processing or computation, the processor 120 stores instructions or data received from other components in the storage unit 130, processes the instructions or data stored in the storage unit 130, and produces result data. It can be stored in the storage unit 130.

Figure 2 is a diagram showing a reference energy ratio for improving fuel efficiency according to an embodiment of the present invention.

Referring to FIG. 2 , a reference energy ratio 210 and a graph for the energy ratio (hereinafter referred to as “energy ratio graph”) for improving fuel efficiency according to an embodiment can be described.

The horizontal axis of the energy ratio graph may include energy parameters related to the driving unit (eg, the driving unit 110 of FIG. 1). For example, the horizontal axis of the energy ratio graph may include energy parameters related to the engine (eg, engine unit 111 in FIG. 1). As another example, the horizontal axis of the energy ratio graph may include energy parameters related to a motor (eg, the motor unit 113 in FIG. 1). As another example, the horizontal axis of an energy rate graph may include energy parameters associated with an engine and energy parameters associated with one or more motors. The vertical axis of the energy ratio graph may represent the ratio of each energy parameter.

Hereinafter, for convenience of explanation of the horizontal axis, a case where the driving unit includes one engine and one motor will be described as an example, but it is not limited to this embodiment. For example, in the case of an electric vehicle (EV), the driving part of the electric vehicle may include only a motor without an engine. As another example, a vehicle may include one to four motors.

Energy parameters related to the engine may include engine driving parameters 201. Energy parameters related to the motor include at least one of motor driving parameters 203, motor regeneration parameters 205, motor rod shift parameters 207, motor power generation parameters 209, or motor starting parameters 211. It can be included. The definition of each parameter is described below.

The total energy may correspond to an energy value that adds engine drive energy, motor drive energy, motor regenerative energy, motor load shift energy, motor power generation energy, and motor starting energy. The unit of total energy can correspond to (Joule, J). The ratio of each energy parameter may correspond to the ratio of each energy value divided by the total energy value. The sum of the energy parameter ratios may correspond to 1.

The ratio of the engine driving parameter 201 may correspond to the ratio of engine driving energy divided by total energy. Engine driving energy may correspond to a value obtained by integrating engine power according to engine driving with respect to time. Engine power according to engine driving may correspond to a value obtained by multiplying the engine torque per hour when the engine is driven by the engine revolutions per minute (RPM) per hour when the engine is driven.

The ratio of the motor drive parameter 203 may correspond to the ratio of motor drive energy divided by total energy. Motor driving energy may correspond to a value obtained by integrating motor power according to motor driving with respect to time. Motor power according to motor driving may correspond to a value obtained by multiplying the motor torque per hour when the motor is driven by the number of motor rotations per minute per hour when the motor is driven.

The ratio of the motor regeneration parameter 205 may correspond to the ratio of motor regeneration energy divided by total energy. The motor regenerative energy may correspond to a value obtained by integrating the motor power resulting from motor regeneration with respect to time. Motor power according to motor regeneration may correspond to a value obtained by multiplying the motor torque per hour during motor regeneration and the number of motor rotations per minute per hour during motor regeneration.

The ratio of motor load shift parameter 207 may correspond to the ratio of motor load shift energy divided by total energy. The motor load shift energy may correspond to a value obtained by integrating the motor power according to the motor load shift with respect to time. The motor power according to the motor load shift may correspond to the product of the motor torque per hour when the motor load shifts and the number of motor rotations per minute per hour when the motor load shifts.

The ratio of the motor generation parameter 209 may correspond to the ratio of the motor generation energy divided by the total energy. The motor generation energy may correspond to a value obtained by integrating the motor power according to the motor generation with respect to time. Motor power according to motor power generation may correspond to the value multiplied by the motor torque per hour during motor power generation and the number of motor rotations per minute per hour during motor power generation.

The ratio of the motor starting parameter 211 may correspond to the ratio of motor starting energy divided by total energy. The motor starting energy may correspond to a value obtained by integrating the motor power according to the starting and drivability assist of the motor with respect to time. Motor power according to motor start-up may correspond to a value obtained by multiplying the motor torque per hour when starting the motor and assisting drivability by the number of revolutions per minute of the motor per hour when starting the motor and assisting drivability.

A processor (e.g., processor 120 of FIG. 1) identifies the ratio of the aforementioned energy parameters based on driving information (e.g., engine torque per hour, engine RPM per hour, motor torque per hour, or motor RPM per hour). (or calculate). The processor receives the driving information from a drive controller that controls the drive unit (e.g., an engine control unit (ECU) or a motor control unit (MCU)) or from a controller area network (CAN) line. The processor may receive the rate of energy parameter from the drive controller or the can line.

The reference energy ratio 210 is the value of the energy parameter calculated based on the driving information that allows the vehicle to have the maximum fuel efficiency, and the total energy value (e.g., based on the driving information that allows the vehicle to have the maximum fuel efficiency) It may include a ratio divided by the sum of the values of the calculated energy parameters. The reference energy ratio 210 may be identified (or measured) at the time of evaluating the fuel efficiency of the vehicle and stored in a storage unit (eg, storage unit 130 in FIG. 1). The reference energy ratio 210 may include information about the reference ratio of each of a plurality of energy parameters.

For example, the reference energy rate 210 is the reference rate of the engine drive parameter 201 stored as 26%, the reference rate of the motor drive parameter 203 stored as 18%, and the motor regeneration parameter 205 stored as 16%. reference rate, the reference rate of the motor load shift parameter (207) stored as 12%, the reference rate of the motor power generation parameter (209) stored as 20%, and the reference rate of the motor start parameter (211) stored as 8%. You can.

The energy ratio may include the ratio of the value of the energy parameter calculated based on driving information collected according to the user's vehicle driving during a specified period divided by the total energy value. The specified period may include values set by the system or values set by the user. For example, the designated period of time may include, but is not limited to, a week, a month, a year, and/or the total period of time the vehicle was used.

The processor may identify a plurality of energy ratios based on driving information collected during different periods of time. For example, the processor may identify a first energy ratio 220 based on driving information collected for a week and a second energy ratio 230 based on driving information collected for a month.

The processor may select one energy rate from among a plurality of energy rates. A method for the processor to select one energy rate may include a method set in the system and/or a method for the user to directly select one energy rate. System The method established above may allow the processor to select one energy rate based on the attributes and/or characteristics of the vehicle. For example, the attributes and/or characteristics of the vehicle may include, but are not limited to, the size, type, purpose, propulsion method, and/or number of motors of the vehicle.

Figure 3 is a diagram showing control of energy ratio according to an embodiment of the present invention.

For convenience of explanation, description of content that is the same or similar to that described in FIG. 2 will be omitted. Referring to FIG. 3, a processor (e.g., processor 120 of FIG. 1) has an energy rate 320 (e.g., the first energy rate 220 of FIG. 2 or the second energy rate 230 of FIG. 2). The driving unit (e.g., the driving unit 100 in FIG. 1) may be controlled to follow the reference energy ratio 310 (e.g., the reference energy ratio 210 in FIG. 2).

The processor may identify the difference between the ratio of the energy parameter and the reference ratio of the energy parameter. For example, the processor may identify the difference between the engine driving parameter 301 (e.g., the ratio of the engine driving parameter 201 in FIG. 2 and the reference ratio of the engine driving parameter 301. As another example, the processor may identify the difference between the ratio of the engine driving parameter 201 in FIG. 2 and the reference ratio of the engine driving parameter 301. It is possible to identify the difference between the ratio of the driving parameter 303 (e.g., the motor driving parameter 203 in Figure 2) and the reference ratio of the motor driving parameter 303. For convenience of explanation, examples of energy parameters are given in engine driving. The parameters 301 and the motor drive parameters 303 are mentioned, but are not limited to the above-described examples.

The processor may identify an energy parameter for which the difference in ratios is greater than or equal to a threshold ratio. The threshold ratio may include a ratio set by the system or a ratio specified by the user. The processor may control the driving unit based on the number of energy parameters whose ratio difference is greater than or equal to a threshold ratio. When there is one energy parameter whose ratio difference is greater than or equal to the threshold ratio, the processor may control the driver so that the difference between the ratio of the energy parameter and the reference ratio of the energy parameter is less than or equal to the threshold ratio.

By controlling the drive unit so that the difference between the ratio of the energy parameters calculated according to the driving information of the drive unit and the reference ratio of the energy parameters measured in the vehicle's fuel efficiency evaluation stage is below the critical ratio, the processor improves the vehicle's fuel efficiency over time. Improvements can be made gradually.

If there are two energy parameters (e.g., a first energy parameter and a second energy parameter) whose ratio difference (e.g., a first ratio difference and a second ratio difference) is greater than or equal to the threshold ratio, the processor determines the first ratio difference and the second ratio difference. Among the ratio differences, a ratio difference with a large value (e.g., the first ratio difference) can be identified. The processor may control the driver so that the difference between the ratio of the energy parameter (eg, the first energy parameter) corresponding to the ratio difference having a large value and the reference ratio of the energy parameter is less than or equal to the threshold ratio.

When there are a plurality of energy parameters whose ratio difference is greater than or equal to a threshold ratio, the processor may identify the priority of each ratio difference based on the size of the plurality of ratio differences. For example, the processor may identify the priority of each ratio difference in the order in which the plurality of ratio differences become larger. According to the priority, the processor may sequentially control the driver so that the difference between the ratio of the energy parameter corresponding to the difference in the priority ratio and the reference ratio of the energy parameter is below the threshold ratio.

By sequentially controlling the ratio of energy parameters according to the order in which the difference between the ratio of the energy parameter and the reference ratio of the energy parameter is large (e.g. priority), the processor can increase the degree to which the fuel efficiency of the vehicle is improved per unit time. .

Based on the driving state of the vehicle, the processor may control the driving unit so that the difference between the ratio of the energy parameter related to the driving state and the reference ratio of the energy parameter is less than or equal to a threshold ratio. The driving state of the vehicle may include a driving state, a power generation state, and/or a regenerative state.

For example, when the driving state of the vehicle is in the driving state, the processor may control the driving unit so that the difference between the ratio of the energy parameter related to the driving state and the reference ratio of the energy parameter is less than or equal to the threshold ratio. At this time, if there are two or more energy parameters whose ratio difference is greater than or equal to the critical ratio, the processor can sequentially control the energy parameters starting from the energy parameter with the largest ratio difference. As another example, when the driving state of the vehicle is in the power generation state, the processor may control the driving unit so that the difference between the ratio of the energy parameter related to the power generation state and the reference ratio of the energy parameter is less than or equal to the threshold ratio. As another example, the processor may control the driver so that the difference between the ratio of the energy parameter related to the regenerative state and the reference ratio of the energy parameter is less than or equal to the critical ratio.

The processor may control the engine and/or motor to control energy parameters. For example, when controlling an engine, the processor may control the torque and/or rpm of the engine by controlling the amount of air and/or fuel sucked into the engine. As another example, when controlling a motor, the processor may control the torque and/or rpm of the motor by controlling the amount of current supplied from the battery to the motor.

Figure 4 is a diagram showing a control method for energy parameters according to an embodiment of the present invention.

Hereinafter, it is assumed that a vehicle control device (eg, vehicle control device 100 of FIG. 1) performs the process of FIG. 4. Additionally, in the description of FIG. 4, operations described as being performed by the device may be understood as being controlled by the processor of the vehicle control device (eg, processor 120 in FIG. 1). Referring to FIG. 4, the vehicle control device can control one energy parameter.

In step 410, the vehicle control device may determine whether the state of the vehicle corresponds to a specified condition. The specified condition may include, but is not limited to, a state in which the vehicle is in an autonomous driving state or a vehicle's driving speed changes within a specified range per unit time. For example, the unit time may be 1 second and the specified range may be 5%. As another example, the designated range may include a range of speeds increased or decreased by 2.5 km/h, that is, a range of 5 km/h, based on the current driving speed of the vehicle.

In step 420, the vehicle control device determines a reference energy ratio (e.g., the reference energy ratio 210 of FIG. 2 or the reference energy ratio 310 of FIG. 3) and an energy ratio (e.g., the first energy ratio 220 of FIG. 2). , the second energy ratio 230 of FIG. 2, or the energy ratio 320 of FIG. 3) can be compared. The vehicle control device can compare the ratio of one energy parameter with the reference ratio of the energy parameter by comparing the reference energy ratio and the energy ratio.

In step 430, the vehicle control device may determine whether the difference between the ratio of the energy parameter and the reference ratio of the energy parameter is greater than or equal to the threshold ratio. The threshold ratio may include a value set by the system or a value specified by the user. For example, the vehicle control device may determine whether the difference between the ratio of the engine driving parameters and the reference ratio of the engine driving parameters is 5% or more.

In step 440, the vehicle control device may control the driving unit so that the ratio difference is less than or equal to the threshold ratio. The vehicle control device can control the driving unit corresponding to the type of energy parameter. For example, when the energy parameter is an engine driving parameter, the vehicle control device can control the engine. As another example, when the energy parameter is a motor regeneration parameter, the vehicle control device can control the motor.

Figure 5 is a diagram showing a control method for energy parameters according to an embodiment of the present invention.

Hereinafter, it is assumed that a vehicle control device (eg, vehicle control device 100 of FIG. 1) performs the process of FIG. 5. Additionally, in the description of FIG. 5, operations described as being performed by the device may be understood as being controlled by the processor of the vehicle control device (eg, processor 120 in FIG. 1).

Referring to FIG. 5, the vehicle control device can control a plurality of energy parameters. For convenience of explanation, description of content overlapping with FIG. 4 is omitted. Step 510 may include operations substantially the same as or similar to step 410, and step 520 may include operations substantially the same as or similar to step 420.

In step 530, the vehicle control device may determine whether the difference between the ratio of the energy parameter and the reference ratio of the energy parameter is greater than or equal to the threshold ratio. As a result of the determination, the vehicle control device may identify energy parameters in which the difference between the ratio of the energy parameter and the reference ratio of the energy parameter is greater than or equal to a threshold ratio.

The vehicle control device may determine priorities among energy parameters in step 540. In step 530, the vehicle control device determines the priority between energy parameters in the order of the largest ratio difference (e.g., difference between the ratio of the energy parameter and the reference ratio of the energy parameter) corresponding to each of the identified energy parameters. You can.

In step 550, the vehicle control device may sequentially control the driving unit so that the ratio difference of the energy parameters becomes less than or equal to the threshold ratio, based on the priority.

Figure 6 is a diagram showing a vehicle control method for improving fuel efficiency of the present invention.

Hereinafter, it is assumed that a vehicle control device (eg, vehicle control device 100 of FIG. 1) performs the process of FIG. 6. Additionally, in the description of FIG. 6, operations described as being performed by the device may be understood as being controlled by the processor of the vehicle control device (eg, processor 120 in FIG. 1).

In step 610, the vehicle control device may identify second energy ratio parameters of the driving unit according to driving information of the vehicle. The vehicle control device may receive the driving information from at least one of an engine control unit (ECU), a motor control unit (MCU), or a vehicle network (controller area network, CAN) of the vehicle. . Driving information may include at least one of engine torque, rounds per minute (RPM) of the engine, torque of the motor, or number of revolutions per minute of the motor. The second energy ratio parameter may include at least one of the first energy ratio 220 of FIG. 2, the second energy ratio 230 of FIG. 2, or the energy ratio 320 of FIG. 3.

In step 620, if the state of the vehicle corresponds to a specified condition, the vehicle control device identifies the first parameter included in the first energy rate parameters and the first parameter included in the second energy rate parameters. A second parameter corresponding to can be identified. The designated condition may include, but is not limited to, a state in which the vehicle is in an autonomous driving state or a vehicle's driving speed changes within a specified range per unit time. The first energy ratio parameters may include at least one of the reference energy ratio 210 of FIG. 2 or the reference energy ratio 310 of FIG. 3. The first parameter may include the energy parameter of FIG. 2 or the energy parameter of FIG. 3. The second parameter may include the energy parameter of FIG. 2 or the energy parameter of FIG. 3.

In step 630, if the difference between the ratio of the first parameter and the ratio of the second parameter is greater than or equal to the threshold ratio, the vehicle control device may control the driving unit so that the difference is less than or equal to the threshold ratio. The ratio of the first parameter may include the reference ratio of the energy parameter of FIG. 2 or the reference ratio of the energy parameter of FIG. 3. The ratio of the second parameter may include the ratio of the energy parameter in FIG. 2 or the ratio of the energy parameter in FIG. 3.

Figure 7 shows a computing system according to one embodiment of the present invention.

Referring to FIG. 7, the computing system 1000 includes at least one processor 1100, a memory 1300, a user interface input device 1400, a user interface output device 1500, and storage connected through a bus 1200. It may include (1600), and a network interface (1700).

The processor 1100 may be a central processing unit (CPU) or a semiconductor device that processes instructions stored in the memory 1300 and/or storage 1600. Memory 1300 and storage 1600 may include various types of volatile or non-volatile storage media. For example, the memory 1300 may include read only memory (ROM) and random access memory (RAM).

Accordingly, steps of a method or algorithm described in connection with the embodiments disclosed herein may be implemented directly in hardware, software modules, or a combination of the two executed by processor 1100. Software modules reside in a storage medium (i.e., memory 1300 and/or storage 1600), such as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, or CD-ROM. You may.

An exemplary storage medium is coupled to processor 1100, which can read information from and write information to the storage medium. Alternatively, the storage medium may be integrated with processor 1100. The processor and storage medium may reside within an application specific integrated circuit (ASIC). The ASIC may reside within the user terminal. Alternatively, the processor and storage medium may reside as separate components within the user terminal.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications and variations will be possible to those skilled in the art without departing from the essential characteristics of the present invention.

Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but are for illustrative purposes, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights of the present invention.

Claims (16)

In a vehicle control device that controls a vehicle,
A driving unit including at least one of a motor or an engine;
a storage unit storing first energy ratio parameters of the driving unit; and
a processor electrically connected to the storage unit; Including,
The processor:
Identifying second energy ratio parameters of the driving unit according to driving information of the vehicle,
If the state of the vehicle corresponds to a specified condition, identify a first parameter included in the first energy rate parameters and identify a second parameter included in the second energy rate parameters and corresponding to the first parameter. and
If the difference between the ratio of the first parameter and the ratio of the second parameter is greater than or equal to the threshold ratio, controlling the driver so that the difference is less than or equal to the threshold ratio,
The specified condition includes a state in which the vehicle is in an autonomous driving state or a change in the driving speed of the vehicle is less than or equal to a specified rate.
In claim 1,
The first energy rate parameter further includes a third parameter, and
The second energy rate parameter further includes a fourth parameter corresponding to the third parameter, and
The processor,
Identifying a first ratio difference corresponding to a difference between the ratio of the first parameter and the ratio of the second parameter,
Identifying a second ratio difference corresponding to the difference between the ratio of the third parameter and the ratio of the fourth parameter,
Compare the first ratio difference and the second ratio difference,
When the first ratio difference is greater than the second ratio difference, control the driver to change the ratio of the second parameter so that the first ratio difference is less than or equal to the threshold ratio, and
When the second ratio difference is greater than the first ratio difference, a vehicle control device that changes the ratio of the fourth parameter by controlling the driving unit so that the second ratio difference is less than or equal to the threshold ratio.
The method of claim 2, wherein the processor:
Based on the comparison of the first ratio difference and the second ratio difference, determine priority according to the size of the ratio difference,
Based on the priority, controlling the driving unit so that the ratio difference of relatively high priority takes precedence over the ratio difference of relatively low priority and is below the threshold ratio, and
A vehicle control device that controls the driving unit so that the ratio difference of the relatively low priority is less than or equal to the threshold ratio.
The method of claim 1, wherein the second parameter is:
A vehicle control device including the driving information of the vehicle collected during a specified period.
In claim 1,
When the driving unit includes the motor,
The first energy rate parameters and the second energy rate parameters may be the driving energy of the motor, the regenerative energy of the motor, the rod shift energy of the motor, the power generation energy of the motor, or the starting energy of the motor. A vehicle control device that commonly includes at least one of the following energies.
The method of claim 1, wherein the processor:
Vehicle control that receives the driving information from at least one of an engine control unit (ECU), a motor control unit (MCU) included in the vehicle, or a vehicle network (controller area network, CAN) of the vehicle. Device.
The method of claim 6, wherein the driving information is:
A vehicle control device comprising at least one of torque of the engine, rounds per minute (RPM) of the engine, torque of the motor, or revolutions per minute of the motor.
The method of claim 1, wherein the first energy rate parameters are:
A vehicle control device wherein the fuel efficiency of the vehicle is set to have a value in a specified range under the specified conditions.
In the vehicle control method,
identifying second energy ratio parameters of the driving unit according to driving information of the vehicle;
If the state of the vehicle corresponds to a specified condition, identify a first parameter included in the first energy rate parameters of the drive unit and a second parameter included in the second energy rate parameters and corresponding to the first parameter. identifying; and
If the difference between the ratio of the first parameter and the ratio of the second parameter is greater than or equal to the threshold ratio, controlling the driver so that the difference is less than or equal to the threshold ratio,
The specified condition includes a state in which the vehicle is in an autonomous driving state or a change in the driving speed of the vehicle is less than or equal to a specified rate.
In claim 9,
The first energy rate parameter further includes a third parameter, and
The second energy rate parameter further includes a fourth parameter corresponding to the third parameter, and
identifying a first ratio difference corresponding to a difference between the ratio of the first parameter and the ratio of the second parameter;
identifying a second ratio difference corresponding to a difference between the ratio of the third parameter and the ratio of the fourth parameter;
Comparing the first rate difference and the second rate difference;
When the first ratio difference is greater than the second ratio difference, controlling the driver to change the ratio of the second parameter so that the first ratio difference is less than or equal to the threshold ratio; and
When the second ratio difference is greater than the first ratio difference, controlling the driving unit to change the ratio of the fourth parameter so that the second ratio difference is less than or equal to the threshold ratio.
In claim 9,
The first energy rate parameter further includes a third parameter, and
The second energy rate parameter further includes a fourth parameter corresponding to the third parameter,
identifying a first ratio difference corresponding to a difference between the ratio of the first parameter and the ratio of the second parameter;
identifying a second ratio difference corresponding to a difference between the ratio of the third parameter and the ratio of the fourth parameter;
Comparing the first ratio difference and the second ratio difference and determining priority according to the size of the ratio difference;
Based on the priority, controlling the driving unit so that the ratio difference of relatively high priority takes precedence over the ratio difference of relatively low priority and is below the threshold ratio; and
Controlling the driving unit so that the ratio difference of the relatively low priority is less than or equal to the threshold ratio.
The method of claim 9, wherein the second parameter is:
A vehicle control method including the driving information of the vehicle collected during a specified period.
In claim 9,
When the driving unit includes a motor,
The first energy rate parameters and the second energy rate parameters may be the driving energy of the motor, the regenerative energy of the motor, the rod shift energy of the motor, the power generation energy of the motor, or the starting energy of the motor. A vehicle control method that commonly includes at least one of energy.
In claim 9,
Receiving the driving information from at least one of an engine control unit (ECU), a motor control unit (MCU) included in the vehicle, or a vehicle network (controller area network, CAN) of the vehicle; A vehicle control method further comprising:
The method of claim 14, wherein the driving information is:
A vehicle control method comprising at least one of engine torque, rounds per minute (RPM) of the engine, torque of a motor, or revolutions per minute of the motor.
The method of claim 9, wherein the first energy rate parameters are:
A vehicle control method in which the fuel efficiency of the vehicle is set to have a value in a specified range under the specified conditions.

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