KR20230108592A - Eco-friendly vehicle and method of engine control for the same - Google Patents

Abstract

An engine control method of an eco-friendly vehicle according to an embodiment of the present invention includes calculating light shading information by receiving a plurality of sensing values sensed by a plurality of sensor units provided in the eco-friendly vehicle and location information about the eco-friendly vehicle; calculating a charging limit value for the current SOC of the eco-friendly vehicle and extracting a variable engine torque amount capable of adjusting an engine operating point based on the calculated charging limit value and the light shading information; receiving and analyzing the interior information of the vehicle, the exterior information of the vehicle, and the shading information obtained based on the eco-friendly vehicle, and determining a weather condition according to the analyzed result value; and driving the engine based on the adjusted engine operating point when the weather condition is satisfied as a result of the determination.

Description

Eco-friendly vehicle and engine control method for the same {ECO-FRIENDLY VEHICLE AND METHOD OF ENGINE CONTROL FOR THE SAME}

The present invention relates to an eco-friendly vehicle that can charge an SOC according to the state of a battery while using engine heat by varying an operating point of an engine in response to weather conditions in an electric vehicle mode, and an engine control method therefor.

A hybrid electric vehicle (HEV) generally refers to a car that uses two power sources together, and the two power sources are mainly an engine and an electric motor. Such a hybrid vehicle has been recently developed because it has excellent fuel efficiency and power performance compared to a vehicle equipped with only an internal combustion engine and is advantageous in reducing exhaust gas.

These hybrid vehicles can operate in two driving modes depending on which power train is driven. One of them is an electric vehicle (EV) mode that runs only with an electric motor, and the other is a hybrid electric vehicle (HEV) mode that runs both an electric motor and an engine. A hybrid vehicle performs switching between the two modes according to driving conditions.

In addition to the classification of driving modes according to the above-described power system, especially in the case of a plug-in hybrid electric vehicle (PHEV), based on the change in the state of charge (SOC) of the battery, the discharge (CD: Charge The driving mode is divided into a depleting mode and a charge sustaining (CS) mode.

In general, in the CD mode, the vehicle drives by driving an electric motor with battery power without engine power, and in the CS mode, the engine power is used to prevent the battery SOC from lowering.

1 shows an example of a mode conversion of a general plug-in hybrid vehicle. 2 shows an example of the efficiency of a general engine.

In FIG. 1 , the horizontal axis represents time, and the vertical axis represents battery state of charge (SOC).

Referring to FIG. 1, when the SOC is higher than the CD/CS reference SOC, which is the conversion standard between CD/CS modes at the time of departure, the driving mode becomes the CD mode, and while the CD mode is maintained, control to continuously decrease the SOC is performed. is carried out

When the SOC falls below the CD/CS standard SOC while driving, mode transition occurs from the CD mode to the CS mode, and in the CS mode, powertrain control is performed at a level that maintains the preset center SOC (ie, CS Center SOC). is carried out

For example, if the current PHEV vehicle is charged, it is possible to drive about 40 km only with electricity without the need for a separate engine start. This mileage is called AER (All Electric Range). If you drive 40km on electricity, the SOC drops below 20%, and it drives like a normal HEV, which is called CS mode.

Recently, the engine is sometimes operated in the CD area for the purpose of satisfying the driver's requested torque and increasing driving efficiency. The driver performs this function with a separate button, and the AUTO mode or forced CS mode, there is

In addition, the efficiency of the current engine is known to be 20 to 30%. In terms of thermal efficiency, this means that only 20 to 30% of fuel is injected when 100 fuel is injected, and as shown in FIG. 2, about 67% of heat loss occurs in the engine.

On the other hand, eco-friendly vehicles cannot use engine heat when driving in electric mode, so if snow falls in winter when the temperature drops below zero, the snow does not melt and continues to accumulate on the vehicle while driving, thereby reducing light while driving. Covering occurs. This blocking of light is a problem directly related to safe driving, and a serious accident occurs when it is impossible to secure forward vision.

An object of the present invention is to provide an eco-friendly vehicle capable of efficiently using engine heat by varying an engine operating point in response to weather conditions in an electric vehicle mode and an engine control method therefor.

The technical problems to be achieved in 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. You will be able to.

An engine control method of an eco-friendly vehicle according to an embodiment of the present invention for realizing the above object is provided with a plurality of sensing values sensed by a plurality of sensor units provided in the eco-friendly vehicle and location information about the eco-friendly vehicle, calculating occluding information; calculating a charging limit value for the current SOC of the eco-friendly vehicle and extracting a variable engine torque amount capable of adjusting an engine operating point based on the calculated charging limit value and the light shading information; receiving and analyzing the interior information of the vehicle, the exterior information of the vehicle, and the shading information obtained based on the eco-friendly vehicle, and determining a weather condition according to the analyzed result value; and driving the engine based on the adjusted engine operating point when the weather condition is satisfied as a result of the determination.

In addition, an engine control device for an eco-friendly vehicle according to an embodiment of the present invention is provided with a plurality of sensing values sensed by a plurality of sensor units provided in the eco-friendly vehicle and location information about the eco-friendly vehicle to calculate light shading information. calculation unit; an extraction unit that calculates a charging limit value for the current SOC of the eco-friendly vehicle and extracts a variable engine torque amount capable of adjusting an engine operating point based on the calculated charging limit value and the light shading information; a determination unit configured to receive and analyze the interior information of the vehicle, the exterior information of the vehicle, and the shading information obtained based on the eco-friendly vehicle, and determine a weather condition according to the analyzed result value; and a control unit configured to control the engine to be driven based on the adjusted engine operating point when the determined result is that the condition of the weather condition is satisfied.

According to various embodiments of the present invention as described above, there is an effect of efficiently using heat of the engine by varying the operating point of the engine in response to weather conditions.

In addition, according to various embodiments of the present invention, even when a PHEV is driving in an electric vehicle mode, a weather condition is recognized, and the engine is operated at a variable engine operating point correspondingly to generate heat of the engine and at the same time, depending on the state of the battery There is an effect that can be performed simultaneously with SOC charging. Accordingly, there is an effect of improving the responsiveness of the vehicle according to the behavior of the engine.

In addition, according to various embodiments of the present invention, the generated heat has an effect of protecting the PE component even when the vehicle is stopped or parked.

The effects that can be obtained in the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description below. will be.

1 shows an example of a mode conversion of a general plug-in hybrid vehicle.
2 shows an example of the efficiency of a general engine.
3 shows an example of a configuration of a hybrid vehicle that can be applied to embodiments of the present invention.
4 is a block diagram showing an example of a control system of a hybrid vehicle that can be applied to embodiments of the present invention.
5 shows an example of a controller structure for controlling an engine according to an embodiment of the present invention.
6 is a flowchart illustrating a method for controlling an engine of an eco-friendly vehicle according to an embodiment of the present invention.
7 and 8 are diagrams differently expressing a method for controlling an engine of an eco-friendly vehicle according to an embodiment of the present invention.
9 is a diagram for explaining an example of a method for controlling an engine of an eco-friendly vehicle according to an embodiment of the present invention.
10 is a diagram for explaining another example of a method for controlling an engine of an eco-friendly vehicle according to an embodiment of the present invention.
11 is a diagram for explaining another example of a method for controlling an engine of an eco-friendly vehicle according to an embodiment of the present invention.
12 is a diagram for explaining an engine control method of an eco-friendly vehicle according to an embodiment of the present invention.

Hereinafter, the embodiments disclosed in this specification will be described in detail with reference to the accompanying drawings, but the same or similar elements are given the same reference numerals regardless of reference numerals, and redundant description thereof will be omitted. The suffixes "module" and "unit" for components used in the following description are given or used together in consideration of ease of writing the specification, and do not have meanings or roles that are distinct from each other by themselves. In addition, in describing the embodiments disclosed in this specification, if it is determined that a detailed description of a related known technology may obscure the gist of the embodiment disclosed in this specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in this specification, the technical idea disclosed in this specification is not limited by the accompanying drawings, and all changes included in the spirit and technical scope of the present invention , it should be understood to include equivalents or substitutes.

Terms including ordinal numbers, such as first and second, may be used to describe various components, but the components are not limited by the terms. These terms are only used for the purpose of distinguishing one component from another.

It is understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle. It should be. On the other hand, when an element is referred to as “directly connected” or “directly connected” to another element, it should be understood that no other element exists in the middle.

Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this specification, terms such as "comprise" or "having" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded. In addition, control units included in names such as motor control units (MCUs) and hybrid control units (HCUs) are widely used in naming controllers that control vehicle-specific functions. It is just a term and does not imply a generic function unit. For example, each controller is a communication device that communicates with other controllers or sensors to control the function in charge, a memory that stores operating system or logic commands and input/output information, and a controller that performs judgment, calculation, and decision necessary for controlling the function in charge. It may include more than one processor.

Prior to describing an engine control method according to an embodiment of the present invention, a structure and control system of a hybrid vehicle applicable to the embodiments will be first described with reference to FIGS. 1 and 2 . It is obvious to those skilled in the art that the vehicle structure described below with reference to FIGS. 3 and 4 can be similarly applied to an electric vehicle (EV), except for parts related to an internal combustion engine.

3 shows an example of a configuration of a hybrid vehicle that can be applied to embodiments of the present invention.

Referring to FIG. 3 , a hybrid vehicle according to an embodiment includes an electric motor (or driving motor, 140) and an engine clutch (EC: Engine Clutch, 130) between an internal combustion engine (ICE, 110) and a transmission 150. A parallel type (Parallel Type or TMED: Transmission Mounted Electric Drive) hybrid powertrain equipped with may be provided.

In such a vehicle, generally, when a driver steps on an accelerator after starting, the motor 140 (or driving motor) is first driven by using power from a battery (not shown) while the engine clutch 130 is open, and the motor 140 ) The power of the transmission 150 and the final reducer (FD: Final Drive, 160) moves the wheels (ie, EV mode). When the vehicle is gradually accelerated and gradually greater driving force is required, the start-up motor 120 may operate to drive the engine 110 .

Accordingly, when the rotation speed of the engine 110 and the motor 140 are substantially the same, the engine clutch 130 is engaged so that the engine 110 and the motor 140 together or the engine 110 drives the vehicle. (i.e. transition from EV mode to HEV mode). When a preset engine-off condition, such as a vehicle deceleration, is satisfied, the engine clutch 130 is opened and the engine 110 is stopped (ie, a transition from the HEV mode to the EV mode). In addition, in a hybrid vehicle, driving force of a wheel is converted into electric energy during braking to charge a battery (not shown), which is referred to as braking energy regeneration or regenerative braking.

The starting generator motor 120 serves as a starter motor when the engine 110 is started, and operates as a generator when the rotational energy of the engine 110 is recovered after the engine is started or when the engine 110 is turned off. Generator (HSG: Hybrid Starter Generator)", and in some cases, it may be referred to as "auxiliary motor".

4 is a block diagram showing an example of a control system of a hybrid vehicle that can be applied to embodiments of the present invention. The control system shown in FIG. 4 may be applied to a vehicle to which the power train described above with reference to FIG. 3 is applied.

Referring to FIG. 4 , in a hybrid vehicle to which embodiments of the present invention may be applied, an internal combustion engine 110 is controlled by an engine controller 210, and a starter motor 120 and a drive motor 140 are controlled by a motor controller (MCU). : Torque can be controlled by the motor control unit 220, and the engine clutch 130 can be controlled by the clutch controller 230, respectively. Here, the engine controller 210 may also be referred to as an engine management system (EMS). In addition, the transmission controller 250 controls the transmission 150. In some cases, a controller for the start-up motor 120 and a controller for each of the drive motors 140 may be provided separately.

Each controller, as its upper controller, is connected to a hybrid controller (HCU: Hybrid Controller Unit, 240) that controls the entire mode conversion process, and changes the driving mode under the control of the hybrid controller 240 and controls the engine clutch during gear shifting. Information and/or information required for engine stop control may be provided to the hybrid controller 240 or an operation may be performed according to a control signal.

For example, the hybrid controller 240 may perform overall power train control in vehicle operation. For example, the hybrid controller 240 may determine an open time of the engine clutch 130 . In addition, the hybrid controller 240 may determine the state (Lock-up, Slip, Open, etc.) of the engine clutch 130 and control the fuel injection stop timing of the engine 110 . In addition, the hybrid controller 240 may control the recovery of engine rotational energy by transmitting a torque command for controlling the torque of the start-up motor 120 to the motor controller 220 for engine stop control.

In addition, the hybrid controller 240 controls the engine control device of the eco-friendly vehicle to receive a plurality of sensing values sensed by a plurality of sensor units provided in the eco-friendly vehicle and location information about the eco-friendly vehicle to calculate light shading information, A charging limit value for the current SOC of the eco-friendly vehicle may be calculated, and a variable engine torque amount capable of adjusting an engine operating point may be controlled to be extracted based on the calculated charging limit value and light shading information.

In addition, the hybrid controller 240 controls the engine control device of the eco-friendly vehicle to receive and analyze the internal information of the vehicle, the external information of the vehicle, and the shading information obtained based on the eco-friendly vehicle, and analyze the weather condition according to the analyzed result value. It is possible to determine the condition of the situation and, as a result of the determination, if the condition of the weather condition is satisfied, the engine may be controlled to operate based on the adjusted engine operating point.

Of course, it is obvious to those skilled in the art that the above-described connection relationship between controllers and functions/divisions of each controller are exemplary and are not limited to their names. For example, the hybrid controller 240 may be implemented such that a corresponding function is replaced and provided in any one of the other controllers other than the hybrid controller 240, or a corresponding function may be distributed and provided in two or more of the other controllers.

Hereinafter, based on the vehicle structure described above, a more efficient engine control method and a vehicle structure therefor according to an embodiment of the present invention will be described.

5 shows an example of a controller structure for controlling an engine according to an embodiment of the present invention.

In the drawings and descriptions below including FIG. 5 , it is assumed that the controller controlling the engine is the hybrid controller 240 . However, this is illustrative and is not necessarily limited thereto.

The controller structure shown in FIG. 5 can be applied to an EV mode or a charge depleting (CD) mode of a hybrid vehicle or an electric vehicle.

Although not shown in FIG. 5 , the sensor unit and the communication module are electrically connected to the hybrid controller 240 and can transmit various types of information to the hybrid controller.

At least one sensor unit may be disposed in an eco-friendly vehicle. For example, the sensor unit includes an Inertial Measurement Unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, an inclination sensor, a weight detection sensor, a heading sensor, a position module, and an eco-friendly vehicle forward. /At least one of a reverse sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illuminance sensor, and a pedal position sensor may be included. Meanwhile, an inertial measurement unit (IMU) sensor may include one or more of an acceleration sensor, a gyro sensor, and a magnetic sensor.

For example, the illuminance sensor may sense the brightness of light in the surrounding environment of the eco-friendly vehicle under the control of the hybrid controller. The illuminance sensor may provide illuminance data about brightness of light, which is a sensed value, to the hybrid controller. The light sensor may sense the brightness of light emitted from the front light of the eco-friendly vehicle. The light sensor may provide light data about the brightness of the light, which is a sensed value, to the hybrid controller.

The communication module may be disposed inside the eco-friendly vehicle and receive location information, map information, weather information, and the like from at least one external server.

For example, the communication module may receive GPS information from a GPS server under the control of the hybrid controller, and check location information of a driving eco-friendly vehicle based on the GPS information.

The communication module may include at least one of a transmission antenna, a reception antenna, a radio frequency (RF) circuit capable of implementing various communication protocols, and an RF element to perform communication.

Referring to FIG. 5 , the hybrid controller 240 may include an engine control device 241 of an eco-friendly vehicle. The engine control device 241 of the eco-friendly vehicle may include a calculation unit 241a, an extraction unit 241b, a determination unit 241c, and a control unit 241d.

The calculation unit 241a may receive a plurality of sensing values sensed by a plurality of sensor units provided in the eco-friendly vehicle and location information about the eco-friendly vehicle to calculate light shading information.

The calculation unit 241a may receive a plurality of sensing values and location information from a plurality of sensor units and calculate light shading information. For example, the plurality of sensing values may include illuminance data for brightness of light and light data for brightness of light. The calculation unit 241a may calculate the degree of light occlusion for the current front by comparing the light intensity recognition of the illuminance sensor and the current light emitted by the eco-friendly vehicle under the control of the hybrid controller.

In addition, the calculation unit 241a may receive GPS information from the GPS server through a communication module under the control of the hybrid controller 240 and obtain location information of an eco-friendly vehicle based thereon.

In addition, the calculation unit 241a may analyze the location information, set a location factor value based on the analyzed result value, and calculate light shading information by multiplying the set location factor value by a plurality of sensing values. Location factor values may have different values corresponding to location information.

The extraction unit 241b may calculate a charging limit value for the current SOC of the eco-friendly vehicle, and extract a variable engine torque amount for adjusting an engine operating point based on the calculated charging limit value and light shading information.

SOC refers to a state of charge of a high voltage battery that supplies power to an electric motor (not shown) that outputs driving force, and may be obtained from a battery sensor or a battery controller (eg, a battery management system (BMS)). The SOC of the battery may be divided into a plurality of stages according to the range of the SOC, such as critical high, high, normal, low, and critical low.

Under the control of the hybrid controller 240, the extraction unit 241b may set different charging limit values for each of a plurality of stages. For example, under the control of the hybrid controller 240, the extraction unit 241b may extract or calculate a charging limit value set differently for each step in consideration of the state of the vehicle, the driving state of the vehicle, the surrounding state of the vehicle, and the like. That is, the extraction unit 241b may calculate or calculate the current available charging amount based on the current SOC under the control of the hybrid controller 240 .

The extraction unit 241b may extract a variable engine torque amount capable of varying an operating engine operating point based on the charging limit value and light shading information calculated under the control of the hybrid controller 240 . The extraction unit 241b may calculate a variable amount of engine torque using the calculated charging limit value and light shading information under the control of the hybrid controller 240 . The variable engine torque amount may be referred to as a variable engine torque amount.

Variable engine torque is the charging limit value according to light shading information and SOC This may mean driving the engine by calculating a variable engine torque based on , and varying or adjusting an engine operating point based on the calculated engine torque.

The determination unit 241c may receive and analyze the inside information of the vehicle, the outside information of the vehicle, and the light shading information obtained based on the eco-friendly vehicle, and determine the condition of the weather situation according to the analyzed result value.

The determination unit 241c receives and analyzes vehicle interior information, vehicle exterior information, and shading information, and based on the analyzed result values, determines the factor values of each of the vehicle interior information, vehicle exterior information, and shading information. can be set

Internal information of the vehicle and external information of the vehicle may be acquired through a plurality of sensor units provided in the vehicle. Internal information of the vehicle may include terrain mode information, driver-requested torque information, wiper information, and the like. External information of the vehicle may include weather information, location information, outside temperature information, and the like.

The determination unit 241c may collect all set factor values, compare the collected result values with a reference score, and determine weather conditions based on the compared result values.

The determination unit 241c may determine that the weather condition is not satisfied when the collected result value is lower than the reference score. That is, the determination unit 241c may determine that it is not a heavy snow situation when the collected result value is equal to or less than the reference score.

The determination unit 241c may determine that the weather condition is satisfied when the collected result value is higher than the reference score. The determination unit 241c may determine that it is a heavy snow situation when the collected result value is equal to or greater than the reference score.

As a result of the determination, the control unit 241d may control the engine to be driven based on the adjusted engine operating point when the weather condition is satisfied. That is, if it is determined that the conditions of the weather situation are satisfied under the control of the hybrid controller 240, the control unit 241d varies the engine operating point based on the variable engine torque amount and drives the engine based on the changed engine operating point. By controlling it, you can dissipate heat from the engine as much as possible.

The control unit 241d may reflect the driver's requested torque to the extracted variable engine torque amount and control the engine to drive the engine at or above the optimal operating line (OOL). Thus, the eco-friendly vehicle of the present invention The temperature can be kept high.

The controller 241d may control the engine to be driven regardless of the driver's requested torque when it is determined that the calculated light shading information is equal to or greater than a preset risk criterion. A detailed description of this will be described later.

6 is a flowchart illustrating a method for controlling an engine of an eco-friendly vehicle according to an embodiment of the present invention. 7 and 8 are diagrams differently expressing a method for controlling an engine of an eco-friendly vehicle according to an embodiment of the present invention.

6 to 8 , an engine control method of an eco-friendly vehicle according to an embodiment of the present invention is as follows.

First, it is a step of calculating light shading information by receiving a plurality of sensing values sensed by a plurality of sensor units provided in the eco-friendly vehicle and location information about the eco-friendly vehicle (S110).

The hybrid controller may receive a plurality of sensing values and location information from a plurality of sensor units and calculate light shading information. For example, the plurality of sensing values may include illuminance data for brightness of light and light data for brightness of light. The hybrid controller may compare the light intensity recognition of the illuminance sensor with the current light emitted by the eco-friendly vehicle to calculate the degree of current occlusion of the front light.

In addition, the hybrid controller may receive GPS information from the GPS server through a communication module and obtain location information of a driving eco-friendly vehicle based on the GPS information.

The hybrid controller may analyze the acquired or provided location information of the eco-friendly vehicle and set a predetermined location factor value based on the analyzed result value.

For example, the hybrid controller analyzes the location information of the eco-friendly vehicle, determines whether the analyzed result is a city with lots of light or a country without street lights, and based on the determination result, different location factor values are assigned to the location information of the eco-friendly vehicle. can be set That is, the hybrid controller may adjust the range of the shading information by applying a predetermined position factor value to the shading information.

For example, if the hybrid controller analyzes the location information of the eco-friendly vehicle and determines that it is in the countryside without streetlights, the location factor value corresponding to the location information of the eco-friendly vehicle may be set to a factor value of 1 or more. That is, the hybrid controller can expand the range of the shading information by multiplying the set position factor value of 1 or more by the shading information. The light blocking information may be information digitizing the degree of light blocking.

Subsequently, a charging limit value for the current SOC of the eco-friendly vehicle is calculated, and a variable engine torque amount capable of varying or adjusting an engine operating point is extracted based on the calculated charging limit value and light shading information (S120).

SOC refers to a state of charge of a high voltage battery that supplies power to an electric motor (not shown) that outputs driving force, and may be obtained from a battery sensor or a battery controller (eg, a battery management system (BMS)). The SOC of the battery may be divided into a plurality of stages according to the range of the SOC, such as critical high, high, normal, low, and critical low. The hybrid controller may set different charging limit values for each of a plurality of stages. For example, the hybrid controller may extract or calculate a charging limit value set differently for each stage in consideration of the state of the vehicle, the driving state of the vehicle, the surrounding state of the vehicle, and the like. That is, the hybrid controller may calculate or calculate the current chargeable amount based on the current SOC.

The hybrid controller may extract a variable engine torque amount capable of varying an operating engine operating point based on the calculated charging limit value and light shading information. That is, the hybrid controller may calculate a variable amount of engine torque using the calculated charging limit value and light shading information. The variable engine torque amount may be referred to as a variable engine torque amount.

Variable engine torque is the charging limit value according to light shading information and SOC This may mean driving the engine by calculating a variable engine torque based on , and varying or adjusting an engine operating point based on the calculated engine torque.

In addition, this is a step of driving the engine at or above the engine optimal operating line (OOL) by reflecting the driver's requested torque or the driver's engine operating point according to the driver's requested torque to the extracted variable engine torque amount.

The hybrid controller may reflect the engine operating point according to the torque demanded by the driver to the calculated variable engine torque amount and control the engine to drive the engine at or above the optimal operating line (OOL). Thus, the eco-friendly vehicle of the present invention The engine room temperature can be maintained at a high level.

It is not limited to this, and in some cases, if the hybrid controller determines that the calculated light shading information is higher than the preset risk criterion, it calculates the engine torque to use the heat in the engine room even when there is no torque requested by the driver and controls to drive the engine. can do. A predetermined risk criterion is a case where light occlusion information is 70% or more, and may be a situation in which it is impossible to easily secure a forward view of a driving eco-friendly vehicle.

The hybrid controller may adjust the output motor torque to match the driver's requested torque according to the variable amount of engine torque. At this time, the output motor torque may be adjusted downward under the control of the hybrid controller.

This is a step of receiving and analyzing interior information of the vehicle, exterior information of the vehicle, and light shading information obtained based on the eco-friendly vehicle, and determining a weather condition according to the analyzed result value. Internal information of the vehicle and external information of the vehicle may be acquired through a plurality of sensor units provided in the vehicle. Internal information of the vehicle may include terrain mode information, driver-requested torque information, wiper information, and the like. External information of the vehicle may include weather information, location information, outside temperature information, and the like.

This is a step of receiving and analyzing vehicle interior information, vehicle exterior information, and shading information, and setting factor values for each of the vehicle interior information, vehicle exterior information, and shading information based on the analyzed result values (S130 ).

The hybrid controller receives and analyzes vehicle interior information, vehicle exterior information, and shading information, and can set factor values for each of the vehicle interior information, vehicle exterior information, and shading information based on the analyzed result values. .

For example, the hybrid controller analyzes the internal information of the vehicle, and when there is Terrain Mode information in the analyzed result value, the first internal factor value may be set to “1”, and the mud mode Alternatively, when there is sand mode information, the first internal factor value may be set to "0".

For example, the hybrid controller analyzes the internal information of the vehicle, and when the wiper information is turned on and is operating in the analyzed result value, the second internal factor value may be set to “1”, and when the wiper information is turned off, the first 2 You can set the internal factor value to "0".

For example, the hybrid controller analyzes external information of the vehicle, and when weather information such as snow or heavy snow is included in the analyzed result value, the first external factor value may be set to “1”, and weather information such as sunny or cloudy may be If there is, the first external factor value may be set to "0". Weather information such as snow or heavy snow described herein is only an example, and is not limited thereto. In some cases, weather information such as rain or storm may also be included.

For example, the hybrid controller analyzes external information of the vehicle, and when the external temperature information includes minus or negative temperature in the analyzed result value, the second external factor value may be set to “1”, and the external temperature information may include video or positive temperature. is included, the value of the second external factor may be set to "0".

For example, the hybrid controller analyzes the shading information, and when the analyzed result value includes 90% or more of the shading information, the shading factor value can be set to "5", and 70% or more of the shading information is 90 If % or less is included, the shading factor value can be set to "4", and if 50% or more and 70% or less of the shading information is included, the shading factor value can be set to "3", and the shading If more than 30% and less than 50% of the information is included, the value of the shading factor can be set to "2", and if more than 10% and less than 30% of the shading information is included, the value of the shading factor can be set to "1". Can be set, and if 10% or less of the light shading information is included, the shading factor value can be set to "0". The scope of the light shading information described here is only an example, and is not limited thereto. It may be changed according to the state of the vehicle or the surrounding environment of the vehicle.

In addition, the hybrid controller may set an internal factor value, an external factor value, and a shading factor value, respectively, by differentiating importance among provided vehicle internal information, vehicle external information, and light shading information. For example, when the hybrid controller determines that “shading information” that can recognize the degree of shading directly related to safety is more important than other information, the hybrid controller assigns the shading factor value given to the shading information to other information. It can be set larger than the given internal factor value or external factor value.

The set or given internal factor value, external factor value, and shading factor value are all collected, the collected result value is compared with the standard score (Cal), and the conditions of the weather situation can be determined based on the compared result value. there is.

The hybrid controller collects all set or given internal factor values, external factor values, and shading factor values, compares the collected result values with a reference score (Cal), and determines the weather conditions based on the compared result values. can judge

For example, when the collected result values are lower than the reference score, the hybrid controller may determine that the weather conditions are not satisfied. That is, the hybrid controller may determine that it is not a heavy snow situation when the collected result value is equal to or less than the reference score.

Unlike this, the hybrid controller may determine that the weather conditions are satisfied when the collected result value is higher than the reference score. That is, the hybrid controller may determine that it is a heavy snow situation when the collected result value is equal to or greater than the reference score.

As a result of the determination, when the weather conditions are satisfied, the step of controlling the engine to operate based on the adjusted engine operating point (S140).

When it is determined that the conditions of the weather conditions are satisfied, the hybrid controller varies the engine operating point based on the variable amount of engine torque and controls the engine to operate based on the variable engine operating point, thereby maximally dissipating heat from the engine. there is.

In addition, the hybrid controller can control the engine to operate at or above the optimal operating line (OOL) by reflecting the driver's engine operating point according to the driver's requested torque to the variable engine torque. The vehicle may maintain the temperature of the engine room at a high level.

9 is a diagram for explaining an example of a method for controlling an engine of an eco-friendly vehicle according to an embodiment of the present invention.

Referring to FIG. 9 , the apparatus for controlling an engine of an eco-friendly vehicle according to an embodiment of the present invention utilizes an illuminance sensor for sensing headlamps in a situation where the eco-friendly vehicle is stopped while driving on a CD, weather information, and terrain mode information. It is possible to recognize the heavy snow situation by calculating the factor value according to the etc.

Each factor value may be given using light occlusion information of the illuminance sensor.

For example, the factor value of shading information is x 0.8, the factor value of weather information is x 0.5, the factor value of outside temperature is x 0.4, the factor value of wiper operation is x 0.3, The Factor value of Terrain Mode can be given x 0.2.

Here, the largest factor can be given to the light occlusion information of the illuminance sensor.

As described above, the engine control device for an eco-friendly vehicle of the present invention calculates information input from a sensor, etc. as a designated factor value, and if the sum of all calculated values is equal to or greater than a reference score (a certain CAL), it is judged as a heavy snow situation. can

10 is a diagram for explaining another example of a method for controlling an engine of an eco-friendly vehicle according to an embodiment of the present invention.

Referring to FIG. 10 , the engine control apparatus for an eco-friendly vehicle according to an embodiment of the present invention determines the degree of shading using illuminance sensor information and changes the engine operating point using the current SOC in a stop situation while the eco-friendly vehicle is driving a CD. can be computed.

For example, the engine control device of the eco-friendly vehicle of the present invention may set the Part Load OOL point as a base line when the light occlusion information or the degree of shading of the illuminance sensor is 50% or more.

That is, the engine control device of the eco-friendly vehicle according to the present invention sets the Part Load OOL point as the base line according to the chargeable SOC. A margin may be given to a base line by differentiating a factor value.

For example, when the engine control device of an eco-friendly vehicle of the present invention sets the Part Load OOL point as a base line, a chargeable SOC of 20% or rechargeable SOC 80% etc. can be given.

In addition, the engine control apparatus for an eco-friendly vehicle according to the present invention may set Full Load Engine Tq as a base line when the light occlusion information or the degree of occlusion of the illuminance sensor is 90% or more.

For example, when Full Load Engine Tq is set as a base line, the engine control apparatus for an eco-friendly vehicle according to the present invention may set a (-) margin value according to the degree of SOC.

Alternatively, the engine control device of an eco-friendly vehicle according to the present invention may prohibit regeneration through HSG when Full Load Engine Tq is set as a base line.

11 is a diagram for explaining another example of a method for controlling an engine of an eco-friendly vehicle according to an embodiment of the present invention.

Referring to FIG. 11 , as described in FIGS. 9 and 10 , when heavy snow conditions are determined, the engine control apparatus of an eco-friendly vehicle according to the present invention determines a variable engine operating point or a variable engine operating point while the eco-friendly vehicle is running. can

The engine control apparatus for an eco-friendly vehicle according to the present invention may adjust or vary motor torque output according to a driver's required torque according to a variable engine driving point.

For example, the engine control apparatus for an eco-friendly vehicle according to the present invention may control engine torque to be output from 100 Nm to 150 Nm according to the changed engine driving point.

In addition, the engine control apparatus for an eco-friendly vehicle according to the present invention may control the motor to output from 100 Nm to 50 Nm when the driver's requested torque is 200 Nm. That is, the motor can be adjusted to such an extent that only regeneration is required in a situation in which an output must be produced before the operating point is changed.

The description of FIGS. 9 to 11 described above is only one example and is not limited thereto.

12 is a diagram for explaining an engine control method of an eco-friendly vehicle according to an embodiment of the present invention.

Referring to FIG. 12 , the engine control apparatus of an eco-friendly vehicle according to an embodiment of the present invention may control the operating point of the engine to be varied or adjusted according to weather information when the vehicle is remotely started while the vehicle is parked outside or being charged at the same time. there is.

The engine control device of an eco-friendly vehicle according to an embodiment of the present invention may receive weather information through a communication module included in the eco-friendly vehicle when remote starting is transmitted when the eco-friendly vehicle is parked outside or being charged.

An engine control apparatus for an eco-friendly vehicle according to an embodiment of the present invention calculates a charging limit value for the current SOC of the eco-friendly vehicle, and a variable engine torque capable of adjusting an engine operating point based on the calculated charging limit value and weather information. can be extracted.

The engine control device for an eco-friendly vehicle according to an embodiment of the present invention may analyze the provided charging limit value and meteorological information, and determine weather conditions according to the analyzed result value.

The engine control apparatus for an eco-friendly vehicle according to an embodiment of the present invention reflects the adjusted engine operating point when, as a result of the determination, the condition of the weather conditions is satisfied, the engine operates at or above the optimal operating line (OOL). Accordingly, the eco-friendly vehicle of the present invention can maintain the temperature of the engine room at a high level.

On the other hand, the above-described present invention can be implemented as computer readable code on a medium on which a program is recorded. The computer-readable medium includes all types of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable media include Hard Disk Drive (HDD), Solid State Disk (SSD), Silicon Disk Drive (SDD), ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, etc. there is Accordingly, the above detailed description should not be construed as limiting in all respects and should be considered illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

Claims (19)

Calculating light shading information by receiving a plurality of sensing values sensed by a plurality of sensor units provided in the eco-friendly vehicle and location information about the eco-friendly vehicle;
calculating a charging limit value for the current SOC of the eco-friendly vehicle and extracting a variable engine torque amount capable of adjusting an engine operating point based on the calculated charging limit value and the light shading information;
receiving and analyzing the interior information of the vehicle, the exterior information of the vehicle, and the shading information obtained based on the eco-friendly vehicle, and determining a weather condition according to the analyzed result value; and
driving an engine based on the adjusted engine operating point when the weather condition is satisfied as a result of the determination;
Engine control method of an eco-friendly vehicle comprising a. According to claim 1,
Calculating the light shading information,
Analyzing the location information and setting a location factor value based on the analyzed result value;
Calculating the light shading information by multiplying the set position factor value by the plurality of sensing values;
The engine control method of an eco-friendly vehicle in which the location factor values have different values corresponding to the location information. According to claim 1,
The step of extracting the variable engine torque amount,
The engine control method of the eco-friendly vehicle further comprising the step of reflecting the driver's requested torque to the extracted variable engine torque amount and driving the engine at an engine optimal operating line (OOL) or higher. According to claim 3,
The step of extracting the variable engine torque amount,
An engine control method of an eco-friendly vehicle controlling the engine to be driven regardless of the driver's requested torque when it is determined that the calculated light shading information is equal to or greater than a predetermined risk criterion. According to claim 1,
The step of determining the condition of the meteorological situation,
The interior information of the vehicle, the exterior information of the vehicle, and the shading information are received and analyzed, and based on the analyzed result values, the interior information of the vehicle, the exterior information of the vehicle, and the shading information are each factor value. setting; and
An engine control method for an eco-friendly vehicle comprising: collecting all of the set factor values, comparing the collected result values with a reference score, and determining the condition of the meteorological situation based on the compared result values. According to claim 5,
The step of determining the condition of the meteorological situation,
An engine control method for an eco-friendly vehicle determining that the condition of the weather condition is not satisfied when the collected result value is lower than the reference score. According to claim 5,
The step of determining the condition of the meteorological situation,
An engine control method for an eco-friendly vehicle that determines that the condition of the weather condition is satisfied when the collected result value is higher than the reference score. According to claim 5,
Setting factor values for each of the inside information of the vehicle, the outside information of the vehicle, and the shading information,
Each factor value is
An engine control method for an eco-friendly vehicle having different values corresponding to the importance of the inside information of the vehicle, the outside information of the vehicle, and the light shading information. According to claim 8,
The factor value of the light shading information is,
An engine control method of an eco-friendly vehicle having a factor value greater than a factor value of the internal information of the vehicle or a factor value of the external information of the vehicle. A computer readable recording medium recording a program for executing the engine control method of an eco-friendly vehicle according to any one of claims 1 to 9. a calculation unit configured to calculate shading information by receiving a plurality of sensing values sensed by a plurality of sensor units provided in the eco-friendly vehicle and location information about the eco-friendly vehicle;
an extraction unit that calculates a charging limit value for the current SOC of the eco-friendly vehicle and extracts a variable engine torque amount capable of adjusting an engine operating point based on the calculated charging limit value and the light shading information;
a determination unit configured to receive and analyze the interior information of the vehicle, the exterior information of the vehicle, and the shading information obtained based on the eco-friendly vehicle, and determine a weather condition according to the analyzed result value; and
As a result of the determination, when the condition of the weather situation is satisfied, a control unit controlling the engine to be driven based on the adjusted engine operating point;
An engine control device for an eco-friendly vehicle comprising a. According to claim 11,
The calculator,
Analyzing the location information, setting a location factor value based on the analyzed result value, and calculating the shading information by multiplying the set location factor value by the plurality of sensing values,
The location factor value has a different value corresponding to the location information. According to claim 11,
The control unit,
An engine control device for an eco-friendly vehicle that drives an engine at an engine optimal operating line (OOL) or higher by reflecting a driver's requested torque to the extracted variable engine torque amount. According to claim 13,
The control unit,
An engine control device for an eco-friendly vehicle that controls the engine to be driven regardless of the driver's requested torque when it is determined that the calculated light shading information is equal to or greater than a predetermined risk criterion. According to claim 11,
The judge,
The interior information of the vehicle, the exterior information of the vehicle, and the shading information are received and analyzed, and based on the analyzed result values, the interior information of the vehicle, the exterior information of the vehicle, and the shading information are each factor value. set up,
An engine control device for an eco-friendly vehicle that collects all of the set factor values, compares the collected result values with a reference score, and determines the condition of the meteorological situation based on the compared result values. According to claim 15,
The judge,
An engine control device for an eco-friendly vehicle that determines that the condition of the weather condition is not satisfied when the collected result value is lower than the reference score. According to claim 15,
The judge,
An engine control device for an eco-friendly vehicle that determines that the weather condition is satisfied when the collected result value is higher than the reference score. According to claim 15,
Setting factor values for each of the inside information of the vehicle, the outside information of the vehicle, and the shading information,
Each factor value is
An engine control device for an eco-friendly vehicle having different values corresponding to the importance of the inside information of the vehicle, the outside information of the vehicle, and the light shading information. According to claim 18,
The factor value of the light shading information is,
An engine control device for an eco-friendly vehicle having a factor value greater than a factor value of the inside information of the vehicle or a factor value of the external information of the vehicle.