KR20200110517A - Apparatus for controlling purge of fuel evaporation in hybrid vehicle and method thereof - Google Patents

Abstract

The present invention relates to a residual gas purge control device of a hybrid vehicle and a method thereof. Provided are the residual gas purge control device of a hybrid vehicle, which efficiently removes residual gas and improves fuel efficiency of the vehicle by controlling an engine to output charging power corresponding to the driving condition of the vehicle and the state of charge (SOC) of a battery in a process of purging residual gas, by charging the battery using the charging power output from the engine, and the method thereof. To this end, the residual gas purge control device of a hybrid vehicle of the present invention includes: a residual gas detection unit for detecting residual gas on a purge path; a vehicle speed detection unit for detecting the driving speed of the vehicle; an SOC detection unit for detecting the state of charge (SOC) of the battery; and a control unit for controlling the engine to output charging power corresponding to the driving speed of the vehicle and the SOC of the battery when purging the residual gas, and controlling a generator to charge the battery using the charging power output from the engine.

Description

A hybrid vehicle residual gas purge control device and its method {APPARATUS FOR CONTROLLING PURGE OF FUEL EVAPORATION IN HYBRID VEHICLE AND METHOD THEREOF}

The present invention relates to a technology for controlling the purge of residual gas generated in a hybrid vehicle.

In general, a hybrid vehicle means driving a vehicle by efficiently combining two or more different types of power sources, but in most cases, the power of the engine and battery to obtain driving power by burning fuel (fossil fuel such as gasoline). It refers to a vehicle that obtains driving power by an electric motor driven by

Hybrid vehicles can form various structures using an engine and an electric motor as power sources. A vehicle that directly transmits the mechanical power of the engine to the wheels and receives the help of an electric motor driven by battery power when necessary is called a parallel hybrid vehicle. In addition, a vehicle that drives an electric motor or charges a battery by changing the mechanical power of the engine into electrical power through a generator is referred to as a series hybrid vehicle. In general, parallel hybrid vehicles are advantageous for high-speed driving or long-distance driving, and serial hybrid vehicles are advantageous for city driving or short-distance driving.

Recently, plug-in hybrid vehicles have been developed that make the capacity of a battery larger than that of a conventional hybrid vehicle and charge the battery from an external power source, and run only in the EV mode when driving at a short distance and in the HEV mode when the battery is depleted. In other words, a plug-in hybrid electric vehicle (PHEV) is equipped with a gasoline-powered internal combustion engine and a battery engine at the same time, like a conventional hybrid vehicle, to drive the vehicle using one or both of them. It is a vehicle that can be charged with external electricity by installing a high-voltage battery of.

Such a hybrid vehicle is directly connected to an engine and a driving motor as a driving source, and includes a clutch and a transmission for power transmission, an inverter for driving the engine and driving motor, and a high voltage battery. It includes a hybrid controller (HCU: Hybrid Control Unit), a motor controller (MCU: Motor Control Unit), and a battery controller (BMS: Battery Management System) that are communicatively connected through communication.

In particular, a TMED (Transmission Mounted Electric Device) type hybrid vehicle in which a motor is mounted on the transmission side and an engine clutch is provided between the motor and the engine transmits the power of the engine to the drive system through the driving motor through the coupling of the engine clutch.

Meanwhile, since fuel evaporative gas including hydrocarbons (HC), which is a pollutant, is generated in the fuel tank of the vehicle, a fuel evaporative gas purge system for removing this is applied to the vehicle.

The fuel boil-off gas purge system collects boil-off gas from the fuel tank in a canister equipped with activated carbon and then sends the collected boil-off gas to the combustion chamber through purge control during engine operation, thereby releasing hydrocarbon (HC) as a pollutant to the atmosphere Prevent. At this time, the canister contains an adsorbent material capable of absorbing hydrocarbons of the fuel evaporation gas from the fuel tank storing volatile fuel, and to prevent the fuel evaporation gas evaporating from the knitting chamber of the carburetor and the fuel tank from being released into the atmosphere. It is connected to the fuel tank to collect fuel evaporation gas.

When such a fuel boil-off gas purge system is applied to a hybrid vehicle, as shown in FIG. 1, the purge valve 101 is located in front of the compressor, so that the purge path to the cylinder (compressor, air cooler, throttle valve) becomes longer. A phenomenon in which the fuel boil-off gas remains on the purge path 102 (hereinafter, referred to as residual gas) occurs, but the fuel boil-off gas purging system of the hybrid vehicle does not take this into account.

In addition, the fuel boil-off gas purge system of a hybrid vehicle has a problem in that the power generated in the process of burning the collected boil-off gas through an engine cannot be utilized to improve fuel efficiency.

Korean Patent Publication No. 2018-0123916

In order to solve the problems of the prior art as described above, the present invention controls the engine to output charging power corresponding to the driving condition of the vehicle and the SOC (State Of Charge) of the battery in the residual gas purging process, and output from the engine. An object thereof is to provide an apparatus and method for controlling residual gas purging of a hybrid vehicle capable of efficiently removing residual gas and improving fuel efficiency of the vehicle by charging the battery using the charged power.

The objects of the present invention are not limited to the objects mentioned above, and other objects and advantages of the present invention that are not mentioned can be understood by the following description, and will be more clearly understood by examples of the present invention. In addition, it will be easily understood that the objects and advantages of the present invention can be realized by the means shown in the claims and combinations thereof.

An apparatus of the present invention for achieving the above object is a residual gas purge control apparatus for a hybrid vehicle, comprising: a residual gas detection unit for detecting residual gas on a purge path; A vehicle speed detector that detects a driving speed of the vehicle; An SOC detector for detecting a state of charge (SOC) of the battery; And a control unit that controls the engine to output charging power corresponding to the driving speed of the vehicle and the SOC of the battery when purging the residual gas, and controls a generator to charge the battery using the charging power output from the engine. Includes.

The apparatus of the present invention may further include a storage unit for storing a table in which the charging power corresponding to the driving speed of the vehicle and the SOC of the battery is recorded.

Here, based on the table, the control unit determines the vehicle speed detected by the vehicle speed detection unit and the charging power corresponding to the SOC of the battery detected by the SOC detection unit, and controls the engine to output the determined charging power. I can.

In addition, the control unit may transmit a control signal for outputting the determined charging power to an engine control unit (ECU).

In addition, when the engine off condition is satisfied while the hybrid vehicle is driving, the controller may close the purge valve and release the engine clutch.

Another apparatus of the present invention for achieving the above object is a residual gas purge control apparatus for a hybrid vehicle, comprising: a residual gas detection unit for detecting residual gas on a purge path; A vehicle speed detector that detects a driving speed of the vehicle; An SOC detector for detecting a state of charge (SOC) of the battery; An ECU (Engine Control Unit) for controlling the engine to output charging power corresponding to the driving speed of the vehicle and the SOC of the battery when the residual gas is purged; And a hybrid control unit (HCU) for controlling a generator to charge the battery using charging power output from the engine.

Another device according to the present invention may further include a storage unit for storing a table in which the charging power corresponding to the driving speed of the vehicle and the SOC of the battery is recorded.

Here, based on the table, the ECU determines the vehicle speed detected by the vehicle speed detection unit and the charging power corresponding to the SOC of the battery detected by the SOC detection unit, and controls the engine to output the determined charging power. I can.

In addition, the HCU may close the purge valve and release the engine clutch when the engine off condition is satisfied while the hybrid vehicle is driving.

A method of the present invention for achieving the above object, in the residual gas purge control method of a hybrid vehicle, the residual gas detection unit detecting the residual gas on the purge path; Detecting a driving speed of the vehicle by a vehicle speed detection unit; Detecting an SOC of the battery by a state of charge (SOC) detector; Controlling, by a controller, an engine to output a charging power corresponding to a driving speed of a vehicle and an SOC of a battery when the residual gas is purged; And controlling, by the control unit, a generator to charge the battery using the charging power output from the engine.

The method of the present invention may further include storing, by the storage unit, a table in which the driving speed of the vehicle and the charging power corresponding to the SOC of the battery are recorded.

Here, the controlling of the engine may include determining a vehicle speed detected by the vehicle speed detection unit and a charging power corresponding to the SOC of the battery detected by the SOC detection unit based on the table; And controlling the engine to output the determined charging power.

In addition, in the controlling of the engine, a control signal for outputting the determined charging power may be transmitted to an engine control unit (ECU).

In addition, the method of the present invention may further include the step of closing the purge valve and releasing the engine clutch if the engine off condition is satisfied while the hybrid vehicle is running, before the step of detecting the residual gas.

The apparatus and method for controlling residual gas purging of a hybrid vehicle according to an embodiment of the present invention control the engine to output charging power corresponding to the driving condition of the vehicle and the state of charge (SOC) of the battery during the residual gas purge process. And, by charging the battery using the charging power output from the engine, it is possible to efficiently remove residual gas and improve fuel efficiency of the vehicle.

1 is an exemplary view showing a fuzzy path of a hybrid vehicle of TMED type to which the present invention is applied,
2 is an example diagram of a hybrid vehicle of TMED type to which the present invention is applied,
3 is a configuration diagram of an apparatus for controlling residual gas purging of a hybrid vehicle according to an embodiment of the present invention;
4 is a flow chart of a method for controlling residual gas purging of a hybrid vehicle according to an embodiment of the present invention;
5 is a block diagram showing a computing system for executing a method of controlling a residual gas purging of a hybrid vehicle according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible even if they are indicated on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function obstructs an understanding of the embodiment of the present invention, a detailed description thereof will be omitted.

In describing the constituent elements of the embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only used to distinguish the component from other components, and the nature, order, or order of the component is not limited by the term. In addition, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

2 is an example diagram of a hybrid vehicle of TMED type to which the present invention is applied.

As shown in Figure 2, the hybrid vehicle of the TMED type to which the present invention is applied, a driving request detection unit 110, an engine control unit (ECU) 120, a transmission control unit (TCU) 130, a battery (high voltage battery) , 140), BMS (Battery Management System, 150), HCU (Hybrid Conteol Unit, 160), Inverter (170), Engine (180), Engine Clutch (190), Motor (200), Transmission (210), Driving Wheel ( 220), and HSG (Hybrid Starter Generator, 230).

The driving request detection unit 110 detects a driver's request signal including an APS (Accel Position Sensor) displacement, a throttle valve displacement, and a brake pedal displacement, which are driving requests from the driver, and outputs information about the driver's request signal.

The ECU 120 controls the overall operation of the engine 180 according to the request of the HCU 160, which is a host controller. In particular, the ECU 120 performs overall control related to fuel injection of the engine.

The TCU 130 controls the transmission ratio of the transmission 110 by determining a target gear stage for up/down according to the current vehicle speed and the displacement of the throttle valve, and when the target gear level is determined, the host controller, HCU 160 Requests slip control of the engine clutch 190.

The battery 140 supplies an operating voltage to the motor 200 in the hybrid mode and the motor mode, and is charged by regenerative energy recovered through the motor 200 in the regenerative braking mode by brake braking.

The battery 140 is electrically connected to the HSG 230 and stores a voltage for driving the HSG 230.

The battery 140 supplies a driving voltage to the HSG 230 when supporting the output of the engine 180, and is charged with a voltage generated by the HSG 230 during regenerative braking.

The BMS 150 comprehensively detects information such as voltage, current, and temperature of the high voltage battery 140 to manage and control a state of charge (SOC) state and an amount of charge/discharge current.

The HCU 160 controls the overall behavior of the vehicle by controlling the output torques of the engine 180 and the motor 200 by integrally controlling each controller according to the driving request of the driver and the state information of the vehicle. In particular, the HCU 160 controls the coupling (ON) and separation (OFF) of the engine clutch 190, and also controls the HSG 230.

HCU 160 determines the hydraulic pressure for the target slip control when the slip control of the engine clutch 190 is requested from the TCU 130, and operates the hydraulic control solenoid that regulates the engine clutch 190 with a current corresponding to the hydraulic pressure. So that the slip control of the engine clutch 190 is performed.

The inverter 170 is an IGBT (Insulated Gate Bipolar Transistor) switch element, and converts the DC voltage of the high voltage battery 140 into a three-phase AC voltage according to the PWM (Pulse Width Modulation) control signal applied from the HCU 160. The motor 200 is driven.

The output of the engine 180 is controlled by the control of the ECU 120, and the amount of intake air may be adjusted through Electric Throttle Control (ETC), which is not shown.

The engine clutch 190 is disposed between the engine 180 and the motor 200 and applies the sum of the output torque of the engine 180 and the output torque of the motor 200 to the transmission 110 in the hybrid mode.

The motor 200 is driven by the voltage of the high voltage battery 140 applied through the inverter 170.

The transmission 210 adjusts the transmission ratio according to the control of the TCU 130, distributes the torque applied by the summation through the engine clutch 190 as a synchronous transmission gear ratio and transmits it to the driving wheels 220 to drive the vehicle. To be able to.

The HSG 230 is a component that is interlocked with the engine 180 and a belt, and provides driving force to the engine 180 by receiving AC power when starting the engine 180 and acting as a starting motor. After the engine 180 is started, the HSG 230 operates as a generator that receives driving power from the engine 180 and generates 3-phase AC power. The HSG 230 improves responsiveness by assisting torque control of the engine 180. A belt is used so that the HSG 230 is connected to the engine 180, but torque control may be performed in consideration of the belt tension. A main pulley is installed on the crankshaft of the engine 180 and rotates together with the crankshaft, and is connected to rotate together with the auxiliary pulley of the HSG 230 through a belt or the like. In this case, the belt is described as an example of a means for transmitting power that is commonly used as a means for transmitting driving force to the engine 180 of a vehicle, and may include other power transmission means such as chains and gears.

3 is a block diagram of an apparatus for controlling residual gas purging of a hybrid vehicle according to an embodiment of the present invention.

As shown in Figure 3, the residual gas purge control apparatus 300 of the hybrid vehicle according to an embodiment of the present invention, the storage unit 10, the residual gas detection unit 20, the vehicle speed detection unit 30, SOC detection unit (40), and a control unit 50 may be included. In this case, according to a method of implementing the apparatus 300 for controlling residual gas in a hybrid vehicle according to an embodiment of the present invention, each component may be combined with each other to be implemented as one, or some components may be omitted.

Looking at each of the above components, first, the storage unit 10 stores a table in which the driving condition of the vehicle and the charging power (kw) corresponding to the SOC (%) of the battery are recorded. In this case, the driving situation may include the driving speed (vehicle speed) of the vehicle, the type of road (highway, national road, local road, general road, etc.). As an example, the table is shown in Table 1 below.

SOC 30% 40% 60% 80% 90% sleaze 4kw 3.5kw 3kw 2.5kw 2kw Medium speed 3kw 2.5kw 2kw 1.5kw 1kw high speed 2kw 1.5kw 1kw 0.5kw 0kw

The storage unit 10 controls the engine to output charging power corresponding to the driving condition of the vehicle and the SOC (State Of Charge) of the battery during the residual gas purging process, and uses the charging power output from the engine to control the battery. It can also store various logic, algorithms and programs required for charging.

The storage unit 10 includes a flash memory type, a hard disk type, a micro type, and a card type (e.g., an SD card (Secure Digital Card) or an XD card (eXtream Digital)). Card)), RAM (Random Access Memory), SRAM (Static RAM), ROM (Read-Only Memory), PROM (Programmable ROM), EEPROM (Electrically Erasable PROM), Magnetic Memory (MRAM) , Magnetic RAM), a magnetic disk, and an optical disk type of memory. The storage medium may include at least one type of storage medium.

The residual gas detection unit 20 detects residual gas on the purge path 102. The residual gas detection unit 20 may be implemented in the form of a sensor, or may estimate the presence of residual gas based on a generally known model.

The vehicle speed detection unit 30 detects the driving speed of the vehicle. The vehicle speed detection unit 30 may directly measure the driving speed of the vehicle, or may collect the driving speed of the vehicle through a vehicle network. In this case, the vehicle network may include a Controller Area Network (CAN), a Local Interconnect Network (LIN), a FlexRay, and a Media Oriented Systems Transport (MOST).

The SOC detection unit 40 detects the SOC of the battery 140 provided in the hybrid vehicle. The SOC detector 40 may directly calculate the SOC of the battery 140 or may obtain the SOC of the battery 140 from the BMS 150.

The control unit 50 performs overall control so that the respective components can normally perform their functions. The control unit 50 may be implemented in the form of hardware or software, or may be implemented in a form in which hardware and software are combined. Preferably, the control unit 50 may be implemented as a microprocessor, but is not limited thereto.

The control unit 50 controls the engine to output charging power corresponding to the driving condition of the vehicle and the SOC of the battery during the residual gas purging process, and is required in the process of charging the battery using the charging power output from the engine. Perform various controls.

The controller 50 may remove residual gas on the purge path by interlocking with the ECU 120 and HCU 160 basically provided in the hybrid vehicle. Of course, the ECU 120 and HCU 160 may directly perform the function of the control unit 50.

When the engine off condition is satisfied while the hybrid vehicle is driving, the control unit 50 closes the purge valve 101 so that residual gas on the purge path can be removed and releases the engine clutch 190. In this case, the engine off condition is a known and commonly used technique, and may include a case in which the required output of the driver can be satisfied only with the output of the battery 140.

The controller 50 drives the engine 180 until all residual gas on the purge path is removed, and then stops the engine 180.

When the engine clutch 190 is released, the control unit 50 controls the residual gas detection unit 20 to detect residual gas on the purge path (the presence or absence of residual gas, the amount of residual gas), and detects the driving speed of the vehicle and the SOC of the battery. The vehicle speed detection unit 30 and the SOC detection unit 40 are respectively controlled so as to be performed.

When the engine clutch 190 is released, the control unit 50 is based on a table in which the driving situation of the vehicle stored in the storage unit 10 and the charging power (kw) corresponding to the SOC (%) of the battery are recorded. The vehicle speed detected by the detection unit 30 and a charging power corresponding to the SOC of the battery detected by the SOC detection unit 40 are determined, and the engine 180 is controlled to output the determined charging power. In this case, a control signal for outputting the determined charging power may be transmitted to the ECU 120.

The controller 50 may control the HSG 230 to charge the battery 140 using the charging power output from the engine 180.

In an embodiment of the present invention, an example of implementing the control unit 50 as a separate configuration will be described, but the HCU 160 and the ECU 120 provided in the hybrid vehicle may perform the functions of the control unit 50. .

That is, based on the table in which the ECU 120 is recorded in the driving condition of the vehicle stored in the storage unit 10 and the charging power (kw) corresponding to the SOC (%) of the battery, the vehicle speed detection unit 30 The detected vehicle speed and the charging power corresponding to the SOC of the battery detected by the SOC detection unit 40 may be determined, and the engine 180 may be controlled to output the determined charging power. In this case, the process of determining the charging power may be implemented to be performed by the HCU 160.

In addition, the HCU 160 may be implemented to control the HSG 230 to charge the battery using the charging power output from the engine.

In addition, the HCU 160 may be implemented to close the purge valve 101 and release the engine clutch 190 so that residual gas on the purge path may be removed when the engine off condition is satisfied while the hybrid vehicle is driving.

4 is a flowchart of a method for controlling residual gas purging of a hybrid vehicle according to an embodiment of the present invention.

First, the residual gas detection unit 20 detects residual gas on the purge path (401).

Thereafter, the vehicle speed detection unit 30 detects the driving speed of the vehicle (402).

Then, the SOC (State Of Charge) detection unit 40 detects the SOC of the battery (403).

Thereafter, when the residual gas is purged, the control unit 50 controls the engine to output a charging power corresponding to the driving speed of the vehicle and the SOC of the battery (404).

In addition, the control unit 50 controls a hybrid starter generator (HSG) to charge the battery using the charging power output from the engine (405).

5 is a block diagram showing a computing system for executing a method for controlling a residual gas purging of a hybrid vehicle according to an embodiment of the present invention.

Referring to FIG. 5, the method for controlling residual gas purging of a hybrid vehicle according to an embodiment of the present invention described above may also be implemented through a computing system. The computing system 1000 includes at least one processor 1100 connected through a system bus 1200, a memory 1300, a user interface input device 1400, a user interface output device 1500, a storage 1600, and A network interface 1700 may be included.

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

Accordingly, the steps of the method or algorithm described in connection with the embodiments disclosed herein may be directly implemented as hardware, software modules, or a combination of the two executed by the processor 1100. The software module is a storage medium such as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, register, hard disk, solid state drive (SSD), removable disk, CD-ROM (i.e., memory 1300) and/or It may reside in the storage 1600. An exemplary storage medium is coupled to the processor 1100, which is capable of reading information from and writing information to the storage medium. Alternatively, the storage medium may be integral with the processor 1100. The processor and storage media 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 illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations 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 to explain the technical idea, 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 by the following claims, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

10: storage
20: residual gas detection unit
30: vehicle speed detection unit
40: SOC detection unit
50: control unit

Claims (14)

A residual gas detection unit for detecting residual gas on the purge path;
A vehicle speed detector that detects a driving speed of the vehicle;
An SOC detector for detecting a state of charge (SOC) of the battery; And
A control unit that controls the engine to output charging power corresponding to the driving speed of the vehicle and the SOC of the battery when purging the residual gas, and controls the generator to charge the battery using the charging power output from the engine
Residual gas purge control device of a hybrid vehicle comprising a.
The method of claim 1,
A storage unit that stores a table that records the vehicle's driving speed and the charging power corresponding to the battery's SOC.
Residual gas purge control apparatus of a hybrid vehicle further comprising a.
The method of claim 2,
The control unit,
Based on the table, the vehicle speed detected by the vehicle speed detection unit and a charging power corresponding to the SOC of the battery detected by the SOC detection unit are determined, and the engine is controlled to output the determined charging power. Vehicle residual gas purge control device.
The method of claim 3,
The control unit,
A residual gas purging control apparatus for a hybrid vehicle, characterized in that transmitting a control signal for outputting the determined charging power to an engine control unit (ECU).
The method of claim 1,
The control unit,
When the engine off condition is satisfied while the hybrid vehicle is running, the purge valve is closed and the engine clutch is released.
A residual gas detection unit for detecting residual gas on the purge path;
A vehicle speed detector that detects a driving speed of the vehicle;
An SOC detector for detecting a state of charge (SOC) of the battery;
An ECU (Engine Control Unit) for controlling the engine to output a charging power corresponding to the driving speed of the vehicle and the SOC of the battery when the residual gas is purged; And
HCU (Hybrid Control Unit) that controls the generator to charge the battery using the charging power output from the engine
Residual gas purge control device of a hybrid vehicle comprising a.
The method of claim 6,
A storage unit that stores a table that records the vehicle's driving speed and the charging power corresponding to the battery's SOC.
Residual gas purge control apparatus of a hybrid vehicle further comprising a.
The method of claim 7,
The ECU,
Based on the table, the vehicle speed detected by the vehicle speed detection unit and a charging power corresponding to the SOC of the battery detected by the SOC detection unit are determined, and the engine is controlled to output the determined charging power. Vehicle residual gas purge control device.
The method of claim 6,
The HCU,
When the engine off condition is satisfied while the hybrid vehicle is running, the purge valve is closed and the engine clutch is released.
Detecting, by the residual gas detection unit, residual gas on the purge path;
Detecting a driving speed of the vehicle by a vehicle speed detection unit;
Detecting an SOC of the battery by a state of charge (SOC) detector;
Controlling, by a control unit, an engine to output charging power corresponding to a driving speed of the vehicle and SOC of the battery when the residual gas is purged; And
Controlling, by the control unit, a generator to charge the battery using charging power output from the engine
Residual gas purge control method of a hybrid vehicle comprising a.
The method of claim 10,
Step of storing a table in which the storage unit records the driving speed of the vehicle and the charging power corresponding to the SOC of the battery
Residual gas purge control method of a hybrid vehicle further comprising a.
The method of claim 11,
The step of controlling the engine,
Determining a charging power corresponding to the vehicle speed detected by the vehicle speed detection unit and the SOC of the battery detected by the SOC detection unit based on the table; And
Controlling the engine to output the determined charging power
Residual gas purge control method of a hybrid vehicle comprising a.
The method of claim 12,
The step of controlling the engine,
The residual gas purge control method of a hybrid vehicle, characterized in that transmitting a control signal for outputting the determined charging power to an engine control unit (ECU).
The method of claim 11,
Before the step of detecting the residual gas, if the engine off condition is satisfied while the hybrid vehicle is running, closing the purge valve and releasing the engine clutch
Residual gas purge control method of a hybrid vehicle further comprising a.

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