KR20200085389A - Apparatus for regenerating gasoline particulate filter for hybrid vehicle and plug-in hybrid vehicle and the Method the same - Google Patents

Abstract

The present invention relates to an apparatus for regenerating a gasoline particulate filter (GPF) for a hybrid vehicle, and a method thereof. According to one embodiment of the present invention, the apparatus for regenerating a GPF for a hybrid vehicle comprises: an engine which burns gasoline fuel and provides a driving force; an HSG which starts the engine, operates as a power generator in case of braking, and generates electric energy; a driving motor which is fastened with the engine through an engine clutch, and provides a driving force; a battery which stores electric energy therein and provides the electric energy to the starting power generator and the driving motor; the GPF which purifies exhaust gas discharged from the engine; and a control unit which selectively controls the engine, motor, transmission, and HSG in accordance with the soot volume of the GPF and temperature conditions, performs an increase in the temperature of the GPF, and regenerates over a regeneration performance temperature of the GPF with the increased temperature. The apparatus for regenerating a GPF of a hybrid vehicle and the method thereof are able to increase the temperature of the GPF by considering the fuel efficiency of the hybrid vehicle.

Description

Apparatus for regenerating gasoline particulate filter for hybrid vehicle and plug-in hybrid vehicle and the Method the same}

The present invention relates to a GPF regeneration device and method of a hybrid vehicle, and more preferably, in a hybrid vehicle or a plug-in hybrid vehicle including a gasoline soot filter, an engine, a motor, a transmission, and a starting generator according to the temperature conditions of the gasoline soot filter It relates to a GPF regeneration device and method of a hybrid vehicle for raising the gasoline soot filter above the regeneration performance temperature capable of selectively operating (HSG) to increase the gasoline soot filter.

BACKGROUND ART Hybrid vehicles with internal combustion engines and electric motors or plug-in hybrid vehicles are known. The internal combustion engine is, for example, a gasoline engine or a diesel engine. The exhaust gas from these engines contains particulate matter (Soot), and thus, for the purpose of reducing the Soot, diesel exhaust filters (DPF) and gasoline soot filters (GPF), etc. Filters can be installed.

When soot accumulates in these filters, the exhaust resistance increases. Accordingly, regeneration control is performed to burn the soot accumulated in the filter using the exhaust heat of the engine or the like at an appropriate timing.

In a hybrid vehicle, a configuration in which the vehicle is controlled according to any one of a plurality of control modes having different numbers of engine operation opportunities is known. For example, International Application Publication No. 2012/131941 discloses a controller for a hybrid vehicle. The controller changes the engine start condition during the charge continuous (CS) mode and the engine start condition during the charge consumption (CD) mode.

However, the prior art discloses only a configuration for controlling the temperature of the gasoline soot filter by using an engine as a control logic for raising the gasoline soot filter, without considering the deteriorating fuel efficiency of the hybrid vehicle, the gasoline soot filter There is a problem in that the temperature rise of the gasoline soot filter to perform only the regeneration of the gas.

The present invention has been devised to solve the above problems, and has an object to provide a technique for raising the gasoline soot filter in consideration of the fuel efficiency of a hybrid vehicle.

In addition, an object of the present invention is to provide a technique for inducing the temperature rise of the gasoline soot filter by selectively applying an engine, HSG, and motor in consideration of the temperature conditions of the gasoline soot filter.

In addition, the present invention provides a technique for performing regeneration of the gasoline soot filter by selectively using an engine, HSG, and motor in consideration of a user's request in performing regeneration of a gasoline soot filter that satisfies a regeneration temperature condition. It is for.

The objects of the present invention are not limited to the above-mentioned objects, and other objects of the present invention not mentioned can be understood by the following description, and can be more clearly understood by the embodiments of the present invention. In addition, the objects of the present invention can be realized by means of the claims and combinations thereof.

A GPF reproducing apparatus and method for a hybrid vehicle for achieving the above-described object of the present invention includes the following configuration.

In one embodiment of the present invention, a gasoline exhaust filter regeneration device for a hybrid vehicle includes an engine that provides driving force by burning gasoline fuel; HSG for starting the engine and acting as a generator when braking to generate electrical energy; A driving motor engaged with the engine through an engine clutch and providing driving force; A battery that stores electrical energy and provides the electrical energy in the starting generator and the driving motor; A gasoline particulate filter (GPF) for purifying exhaust gas discharged from the engine; And selectively controlling the engine, the motor, the transmission, and the HSG according to the soot amount and temperature conditions of the gasoline soot filter to increase the temperature of the gasoline soot filter, and regenerate at a temperature higher than the regeneration performance of the heated gasoline soot filter. It provides a GPF reproducing apparatus of a hybrid vehicle comprising; a control unit configured to perform.

In addition, when the soot amount of the gasoline soot filter is less than or equal to the first reference value, and the temperature of the gasoline soot filter exceeds the first reference temperature, the controller maintains a passive cut of the engine in a state where the engine clutch is joined. It provides a GPF regeneration device of a hybrid vehicle characterized in that to perform the control to regenerate the gasoline soot filter.

In addition, when the soot amount of the gasoline soot filter exceeds the first reference value to the second reference value or less, the control unit performs at least one of downshifting, shifting the engine operating point, maintaining the engine clutch connection, and maintaining the engine on state by controlling It provides a GPF regeneration device for a hybrid vehicle, characterized in that to perform the heating of the gasoline soot filter.

In addition, when the soot amount of the gasoline soot filter exceeds the second reference value, the controller performs a ignition timing delay or an air-fuel ratio control in an engine-on state to increase the gasoline soot filter's GPF regeneration device. Provides

In addition, the control unit GPF regeneration device of the hybrid vehicle, characterized in that sequentially controlling the change of the number of shifts down, the engine operating point upward, the engine clutch joint maintenance and engine on state maintenance change control in accordance with the temperature rise of the gasoline soot filter Provides

In addition, the GPF regeneration method of the hybrid vehicle includes determining the amount of soot in the gasoline soot filter; If the soot amount is less than or equal to the first reference value, passive control is performed when the temperature of the gasoline soot filter exceeds the first reference temperature, and if the soot amount exceeds the first reference value or less than the second reference value, HCU active control is performed. If the second reference value is exceeded, performing EMS active control; Measuring the temperature of the gasoline soot filter according to the control; When the temperature of the gasoline soot filter is above the regeneration performance temperature, regenerating a gasoline soot filter; provides a method for regenerating GPF in a hybrid vehicle.

In addition, in the step of performing the HCU active control, the temperature of the gasoline soot filter is below the regeneration performance temperature, depending on the temperature condition of the gasoline soot filter, the number of shifts is changed downward, the engine operating point is increased, and the engine clutch is maintained. And it provides a method for reproducing GPF of a hybrid vehicle, characterized in that sequentially performing the engine-on-state maintenance control.

In addition, the temperature condition of the gasoline soot filter provides a method for regenerating GPF in a hybrid vehicle, characterized in that it comprises a temperature of the gasoline soot filter and a temperature change amount of the gasoline soot filter.

In addition, when the temperature of the gasoline soot filter is above the regeneration performance temperature, in the step of regenerating the gasoline soot filter, determining whether the motor speed is greater than or equal to a first reference speed; If the motor is less than the first reference speed, performing regeneration of a gasoline soot filter through motor driving, and if the motor is greater than or equal to the first reference speed, determining whether the vehicle speed is greater than or equal to the second reference speed; When the speed of the vehicle is greater than or equal to the second reference speed, the engine is switched to the passive regeneration mode for fastening the engine clutch in the fuel cut state, and when the speed of the vehicle is less than the second reference speed, the gasoline soot filter through HSG driving It provides a method for reproducing a GPF of a hybrid vehicle comprising a;

In addition, when the motor is less than the first reference speed, in the step of performing regeneration of the gasoline soot filter through motor driving, determining the input of the user's accelerator pedal sensor (APS); In the step of determining the input of the user's accelerator pedal sensor (APS), when there is no input of the user's accelerator pedal sensor (APS), the motor is driven to drive the gasoline soot filter. Provides a method for reproducing a GPF of a hybrid vehicle, including reproducing and terminating logic when an input of an accelerator pedal sensor (APS) of the user exists.

In addition, when the speed of the vehicle is less than the second reference speed, in the step of performing regeneration of the gasoline soot filter through HSG driving, determining whether an engine clutch engagement is required for raising the gasoline soot filter; Maintaining the regeneration of the gasoline soot filter through HSG driving when the temperature rise of the gasoline soot filter is not required; And when the temperature rise of the gasoline soot filter is required, performing an engine clutch lock-up and terminating the logic; provides a hybrid vehicle GPF regeneration method comprising a.

According to the present invention, the following effects can be obtained by the configuration, combination, and use relationship described above with respect to the present embodiment.

The present invention has an effect of preventing breakage of the gasoline soot filter caused by excessive soot of the gasoline soot filter.

In addition, the present invention applies a heating method that is sequentially applied according to the temperature conditions of the gasoline soot filter, and thus has an effect of minimizing the deterioration factors of fuel efficiency of the vehicle.

1 is an embodiment of the present invention, showing a coupling relationship between the configuration of a hybrid vehicle in a block diagram.
2 is an embodiment of the present invention, showing a coupling relationship between the configuration of the gasoline soot filter in a block diagram.
3 is an embodiment of the present invention, showing a flow chart for performing the temperature rise of the gasoline soot filter.
4 is an embodiment of the present invention, showing a flow chart of active control for determining the temperature rise of the gasoline soot filter.
5 is an embodiment of the present invention, showing a flow chart of active control for performing the temperature rise of the gasoline soot filter.
6 is a flow chart for performing regeneration of a gasoline soot filter as an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be interpreted as being limited to the following embodiments. This embodiment is provided to more fully describe the present invention to those skilled in the art.

In addition, in the case of "vehicle" and "hybrid vehicle" described in the specification, it is described as a concept including both a conventional hybrid vehicle and a plug-in hybrid vehicle.

In addition, terms such as "...filter", "...engine", "...controller" described in the specification mean a unit that processes at least one function or operation, which is hardware or software or hardware and It can be implemented with a combination of software.

In addition, in this specification, the names of the components are classified as first, second, etc., to distinguish them in the same relationship with the names of the components, and are not necessarily limited to the order in the following description.

The present invention is a technique for regeneration of a gasoline particulate filter (GPF) 200 located in an exhaust manifold of the engine 100 in a hybrid vehicle including the gasoline engine 100.

In the case of the gasoline soot filter 200 of the present invention, it can be configured to be located in the exhaust stage of a vehicle equipped with LP-EGR (Low pressure exhaust gas recirculation), which is typically located in the exhaust manifold of the gasoline engine 100 Bar, it may be provided in the exhaust pipe through which the exhaust gas flows.

The gasoline soot filter 200 collects particulate matter (PM) discharged from the gasoline engine (100) into the filter and then raises the temperature of the exhaust gas to a certain temperature (regeneration performance temperature) or higher to collect particulate matter collected in the filter. (PM) is burned and removed. More preferably, in the case of the gasoline soot filter 200 of the present invention, as a particulate material, it is possible to collect soot (soot), and is configured to perform the regeneration of the gasoline soot filter 200 by burning the collected soot.

1 is a configuration of the present invention, showing the coupling relationship between the configuration of a hybrid vehicle equipped with a gasoline soot filter 200 in a block diagram.

In the case of the hybrid vehicle of the present invention including the gasoline engine 100, the hybrid starter generator (HSG, hereinafter referred to as HGS) configured to be connected to the engine 100 to start and generate power by being connected to the engine 100 crank pulley ) 130, is configured to be connected to the engine 100 and the engine clutch 110, the motor 120 for applying a driving force to the vehicle, and transmits the driving force applied from the engine 100 and the motor 120 to the wheel It includes a transmission 140 configured to.

In the case of the motor 120, it is configured to apply electric energy from the battery 150 through the inverter 160 to the electric motor 120 or the HSG 130. In the case of the engine clutch 110, it is configured to selectively maintain the fastening between the engine 100 and the motor 120.

The control unit 300 of the present invention is configured to measure the amount of soot in the gasoline soot filter 200, and to selectively perform the driving of the motor 120, the engine 100, and the HSG 130. In addition, it is connected to a sensor unit (not shown) that can measure the temperature of the gasoline soot filter 200 in real time, and is configured to perform temperature control of the gasoline soot filter 200 according to the received information. In addition, the control unit 300 of the present invention can perform single-stage control of the transmission 140, and is configured to perform selective engagement of the engine clutch 110.

In one embodiment of the present invention, the control unit 300 includes an engine management system (EMS), a hybrid control unit (HCU), a motor control unit (MCU), and a transmission control unit: TCU).

As described above, the control unit 300 of the present invention allows the engine to perform heating and regeneration of the gasoline soot filter 200 located in the exhaust manifold of the engine 100 so as to control the operation of the driving system and the transmission system of the vehicle ( 100), the motor 120, HSG 130 and the transmission 140 are configured to control at least one or more.

The control unit 300 of the present invention is configured to perform temperature increase control according to the amount of soot collected by the gasoline soot filter 200. The amount of soot collected by the gasoline soot filter 200 is equal to or less than the first reference value, and the gasoline soot filter When the temperature of the temperature exceeds the first reference temperature, passive control is performed to maintain the fuel cut of the engine 100 in the state where the engine clutch 110 is joined.

In the case of passive control, when the GPF regeneration condition is satisfied according to driving, the regeneration control that does not include active control of the driving unit associated with the engine 100 through the control unit 300 is performed as a control for burning the suit.

In one embodiment of the present invention, the passive control is a temperature increase control performed to perform the regeneration of the gasoline soot filter 200 when the soot amount is 2.2 g/L or less (the first reference value), and the fuel cut of the engine 100 is used. In the maintained state, control is performed to drive the engine 100 using the motor 120 or the HSG 130.

In addition, when the collected soot amount of the gasoline soot filter 200 is greater than the first reference value and less than or equal to the second reference value, the control unit 300 performs HCU active control, such as the motor 120, the engine clutch 110, and the HSG 130 ).

In one embodiment of the present invention, the second reference value may be set to a value greater than the first reference value, and the first reference value may be set to 2.2 g/L and the second reference value to 3.1 g/L.

In one embodiment of the present invention, the HCU active control performs the temperature increase control according to the temperature increase request of the gasoline soot filter 200 received from the EMS, and performs the shift pattern change as the first step, and the engine as the second step. (100) Performs an operation point upward, performs engine clutch 110 bonding control as a third step, and performs control to maintain the engine 100 on in the fourth step.

In the case of the shift pattern change control as the first step HCU active control, the control to increase the engine 100 speed by downshifting the number of stages of the current transmission 140 by EMS is performed. Accordingly, the RPM speed of the engine 100 is configured to be high, so the driving force and temperature output from the engine 100 increase.

When the first stage HCU active control is performed, when the temperature of the gasoline soot filter 200 is below the second reference temperature, the control unit 300 is configured to perform the second stage HCU active control, and the engine 100 operating point Since it is configured to perform upward, it performs control to increase the engine 100 RPM to the maximum torque that can be used for EGR.

When the second stage HCU active control is performed, when the temperature of the gasoline soot filter 200 is below the third reference temperature, the control unit 300 is configured to perform the third stage HCU active control, and the engine clutch 110 is joined When reaching the RPM of the motor 120 capable of performing, the engine clutch 110 is configured to perform bonding without considering the state of charge (SOC) of the battery 150.

When performing the third step HCU active control, the engine clutch 110 bonding conditions are relaxed, so that the time between the motor 120 and the engine 100 is extended, and the gasoline soot filter according to the driving of the engine 100 ( 200).

That is, in the third step HCU active control, the engine clutch 110 is configured to perform engine ignition on at a vehicle speed capable of joining the engine clutch 110, and the engine clutch 110 is configured to engage with the motor 120. It is configured to perform the heating of the gasoline soot filter 200 by maintaining the.

When the third stage HCU active control is performed, when the temperature of the gasoline soot filter 200 is below the fourth reference temperature, the control unit 300 is configured to perform the fourth stage HCU active control, and the engine clutch 110 It is configured to maintain the fastening of the motor 120 and the engine 100 by performing bonding. That is, the engine clutch 110 is fastened irrespective of the fastening conditions of the motor 120 and the engine 100, and is configured to increase the temperature of the gasoline soot filter 200 by continuously driving the engine 100. .

Moreover, the control unit 300 performs EMS active control when the collected soot amount of the gasoline soot filter 200 exceeds the second reference value, and maintains the junction of the engine clutch 110, as well as the engine 100. By controlling the ignition timing and air-fuel ratio, it is controlled to actively drive the engine 100.

That is, in the case of EMS active control, the most rapid heating of the gasoline soot filter 200 among the temperature control of the present invention can be performed, which is a control method for actively burning the soot.

As described above, according to the present invention, the control unit 300 performs the temperature increase control based on the amount of soot of the gasoline soot filter 200. In performing the temperature increase control, the engine according to the real-time temperature of the gasoline soot filter 200 100), the motor 120, the transmission 140 and HSG 130 are controlled to selectively drive.

When the gasoline soot filter 200 is heated to a sufficient temperature, the controller 300 of the present invention is configured to perform regeneration of the gasoline soot filter 200, so that the speed of the motor 120 is greater than or equal to the first reference speed If it is, it is determined whether the vehicle speed is greater than or equal to the second reference speed.

When the speed of the motor 120 exceeds the first reference speed and the speed of the vehicle exceeds the second reference speed, it is configured to regenerate the gasoline soot filter 200 by performing passive driving. That is, in the passive driving, the engine clutch 110 is configured to regenerate the gasoline soot filter 200 while maintaining the fuel cut of the engine 100 in the locked-up state, the speed of the vehicle and the speed of the engine 100 Can be linked to minimize heterogeneity.

When the speed of the motor 120 is less than or equal to the first reference speed, it is configured to perform regeneration of the gasoline soot filter 200 through driving the motor 120, and the transmission 140 while maintaining the lockup of the engine clutch 110 ) Is configured to maintain neutral, the engine 100 is driven by the motor 120, the gasoline soot filter 200 is regenerated.

In the case of the regeneration method through driving the motor 120 as described above, since the engine 100 can be controlled at a certain RPM, there is an advantage of high control stability and improved fuel efficiency, but the vehicle speed and the engine 100 ) There may be a feeling of heterogeneity due to different driving speed.

Moreover, in the case of a regeneration method through driving the motor 120, when an accelerator petal input exists according to a user's request, the regeneration is terminated.

In the case of the regeneration method through driving the motor 120, cooperative control of HCU, EMS, TCU, and MCU may be required as a controller.

Finally, when the speed of the motor 120 exceeds the first reference speed and the speed of the vehicle is equal to or less than the second reference speed, a method for regenerating the gasoline soot filter 200 through driving the HSG 130 is provided. That is, the engine clutch 110 is driven to apply the torque of the engine 100 through the HGS in a state in which the lock-up is released, and thus the engine 100 can be driven at a constant RPM, thereby maintaining control stability. In addition, since the engine clutch 110 maintains the released state, it is possible to perform separate control from driving of the vehicle through the motor 120.

As described above, when the temperature increase condition of the gasoline soot filter 200 is satisfied, the controller 300 of the present invention is a method for regenerating the gasoline soot filter 200, a passive driving method, a regeneration method through driving the motor 120, and It is configured to perform combustion of the suit by selectively applying the regeneration method through the HSG 130 driving.

The engine 100 of the present invention is a gasoline engine 100, which includes LP EGR and is configured to include a gasoline soot filter 200 located in the exhaust gas line. In FIG. 2, the engine 100 of the present invention And the coupling structure of the exhaust line.

As shown, the engine 100 consists of a multi-cylinder engine 100, and is configured to include at least one cylinder. Moreover, since it includes a turbocharger configuration located in the exhaust manifold, pumping loss can be reduced in the low/low load region through EGR, and the ignition timing can be advanced by reducing the temperature of the combustion chamber in the medium/mid load region. Therefore, the fuel efficiency of the vehicle can be improved.

In addition, LP EGR (low pressure exhaust gas recirculation) used in the gasoline engine 100 recirculates the exhaust gas that has passed through the turbine of the turbocharger to the intake passage in front of the compressor. In the case of the exhaust gas that has passed through the LP EGR as described above, the soot is collected through the gasoline soot filter 200 and the purified exhaust gas is configured to be discharged to the outside of the vehicle. As described above, the gasoline engine 100 located in the hybrid vehicle includes the gasoline soot filter 200, so that the temperature rise control is performed through the configuration of the hybrid vehicle to regenerate the filter at a temperature above the regeneration performance.

3 is a flowchart illustrating a determination process for performing GPF regeneration of the present invention, and more preferably, discloses a process of determining whether to heat up based on the amount of soot collected in the gasoline soot filter 200. .

Typically, in measuring the amount of soot collected in the gasoline soot filter 200, the amount of soot collected in the gasoline soot filter 200 is measured based on the differential pressure of the exhaust gas passing through the gasoline soot filter 200 It can be done (S110).

That is, when the upper pressure and the lower pressure of the gasoline soot filter 200 exceeds a preset pressure difference, it is configured to determine that regeneration of the gasoline soot filter 200 is required.

As described above, in the state in which the amount of soot of the gasoline soot filter 200 is measured, FIG. 3 is an embodiment of the present invention, and is a flowchart of a determination process for performing the temperature increase of the gasoline soot filter 200 through the control unit 300 Is showing.

The control unit 300 can measure the amount of soot based on the difference in pressure applied to both ends of the gasoline soot filter 200 (S110), when the measured amount of soot exceeds the second reference value (S120), EMS active control It is configured to perform (S200). In addition, when the measured soot amount exceeds the first reference value and the second reference value or less (S130), it is configured to induce heating of the gasoline soot filter 200 by performing HCU active control (S200).

Moreover, when the measured soot amount is equal to or less than the second reference value and the first reference value, and the temperature of the gasoline soot filter 200 exceeds the first reference temperature (S140), passive control is performed to perform gasoline soot filter according to the driving environment of the vehicle. It is configured to perform the regeneration of the gasoline soot filter 200 at the point where the 200 can be regenerated (S150).

That is, in performing the passive control (S150), when the temperature of the gasoline soot filter 200 is less than the seventh reference temperature (regeneration performance temperature) (S160), return to the first stage and measure the amount of soot in the gasoline soot filter 200 And (S110), when the temperature of the gasoline soot filter 200 is above the seventh reference temperature (regeneration performance temperature) (S160), it is determined whether the soot amount is less than the third reference value (S170).

If the soot amount is greater than or equal to the third reference value, passive control is performed (S150), and if it is less than the third reference value, logic is terminated (S500).

In the case of performing the EMS active control and the HCU active control (S200), as the control unit 300 of the present invention, the active control of the EMS or HCU is configured to be performed, and the gasoline soot filter 200 is regenerated according to the control When it exceeds the temperature (S300), it is configured to perform the regeneration of the gasoline soot filter (S400).

It is determined whether the temperature of the gasoline soot filter 200 that has undergone regeneration is less than the set value (s410), and if the temperature is less than the set value, the process returns to step S110 for measuring the initial soot amount. If the temperature of the gasoline soot filter 200 that has been regenerated is greater than or equal to the set value, it is determined whether the soot amount is less than the fourth reference value (S420), and if the soot amount is less than the fourth reference value, the logic is terminated (S500). When the amount of soot exceeds the fourth reference value, the regeneration of the gasoline soot filter 200 is maintained (S400).

4 is a flowchart of a determination process for determining the temperature rise of the gasoline soot filter 200 by performing EMS active control and HCU active control as an embodiment of the present invention.

As illustrated, when the amount of soot measured by the control unit 300 exceeds the second reference value, the temperature of the gasoline soot filter 200 is performed by performing EMS active control (S210), and the second reference value exceeds the first reference value. When the following soot amount is included, it is configured to perform the first to fourth step HCU active control (S220 to S250).

In the case of EMS active control (S210), the engine 100 is configured to maintain the on state continuously, control of the perception ignition (ignition timing delay) of the engine 100 and air-fuel ratio control of the ignition of the engine 100 (fuel injection ratio) Control) to create a driving environment of the engine 100 generating high torque. Since the gasoline soot filter 200 is heated through the engine 100 driven as described above, the most aggressive control for raising the gasoline soot filter 200 is performed.

When the temperature of the gasoline soot filter 200 heated through the control exceeds the sixth reference temperature, regeneration of the gasoline soot filter 200 is performed (S400), and if it is below the sixth reference temperature, EMS active control It is performed continuously (S210).

Differently from this, the control unit 300 is configured to perform heating of the gasoline soot filter 200 by performing HCU active control when the amount of soot located in the gasoline soot filter 200 exceeds the first reference value and is less than or equal to the second reference value. .

In the case of the HCU active control, it is configured to include the control steps of the first to fourth steps, and thus sequentially performs the HCU active control of the first to fourth steps according to the temperature conditions of the gasoline soot filter 200 It is configured to (S220 to S250).

In the case of the first step HCU active control, it is configured to perform the downshift of the transmission 140 through the control of the HCU and TCU, so that the driving speed (RPM) of the engine 100 is controlled to increase (S220).

When the temperature of the gasoline soot filter 200 measured through the control exceeds the second reference temperature (S211), and the regeneration of the gasoline soot filter 200 is performed (S400), and when the temperature is below the second reference temperature (S211) ), is configured to perform the second step HCU active control (S210).

The second stage HCU active control is configured to adjust the operating point of the engine 100 upward, and more preferably, is configured to increase the operating point of the engine 100 up to the maximum torque value at which EGR can be used (S230). .

When the second step HCU active control of the control unit 300 is performed, the power of the engine 100 is configured to increase, and thus, it is configured to induce the heating of the gasoline soot filter 200. When the temperature of the heated gasoline soot filter 200 exceeds the third reference temperature (S231), regeneration of the gasoline soot filter 200 is performed (S400), and when the temperature is below the third reference temperature (S231), It is configured to perform the third step HCU active control (S240).

The third step HCU active control is controlled to perform the engine clutch 110 bonding without considering the SOC amount of the battery 150 when the engine clutch 110 bonding condition is satisfied (S240). That is, when the motor 120 has a rotational speed equal to or higher than a certain speed, the engine clutch is configured to be engaged, so that the engine 100 is controlled to increase the time in the on state. Preferably, the rotational speed of the motor 120 may be controlled such that the junction of the engine clutch 110 is maintained under 1000 RPM conditions.

In summary, the third stage HCU active control is a condition for joining the engine clutch 110, and determines only the speed value of the motor 120 and performs the engine clutch 110 joining, so that the time when the engine 100 is driven is turned on. It is controlled to increase the gasoline soot filter 200 to increase the temperature.

When the temperature of the gasoline soot filter 200 heated up through the third step HCU active control exceeds the fourth reference temperature (S241), the controller 300 performs regeneration of the gasoline soot filter 200 ( S400), when the temperature is below the fourth reference temperature (S241), it is configured to perform the fourth step HCU active control (S250).

The fourth step HCU active control is controlled to perform the bonding of the engine clutch 110 regardless of the bonding conditions of the engine clutch 110, and is configured to continuously maintain the engine 100 on state (S250).

That is, the third to fourth stage HCU active control is configured to increase the time at which the engine 100 is maintained by relaxing the bonding conditions of the engine clutch 110, so that the gasoline soot filter 200 is It is a configuration that is more actively controlled to perform the heating.

When the gasoline soot filter 200 exceeds the fifth reference temperature through the fourth step HCU active control (S251), it is configured to perform regeneration of the gasoline soot filter 200 (S400), and is below the fifth reference temperature. In case (S251), it is configured to continuously perform the fourth step HCU active control (S250).

It is configured to perform regeneration of the gasoline soot filter 200 above the regeneration performance temperature by performing the disclosed EMS active control and HCU active control, and the sixth reference temperature and the fifth reference temperature are configured to have substantially the same temperature. Can be.

In addition, the temperature set from the second reference temperature to the fifth reference temperature may be configured to sequentially have a high temperature. Preferably, in the case of the second reference temperature to the sixth reference temperature, it may be configured to a temperature above the regeneration performance temperature.

In summary, FIG. 4 is a method for reproducing a GPF of a hybrid vehicle, and performs a process of determining a control state according to a current state of the vehicle. Hereinafter, a process of performing control through a control unit will be described in FIG. 5.

5 is a GPF regeneration method of the hybrid vehicle of the present invention, showing a control method for performing a temperature increase of the gasoline soot filter 200 in a flow chart.

That is, FIG. 5 discloses a determination process for setting a GPF playback method according to the current state of the hybrid vehicle and performing control according to the set playback method by FIG. 4.

As an embodiment of the present invention, the differential pressure of the gasoline soot filter 200 may be measured according to the pressure applied to both ends of the gasoline soot filter 200, and the amount of soot of the gasoline soot filter 200 may be measured based on the measured differential pressure. It is configured to measure.

When the measured soot amount is equal to or less than the first reference value, the present invention performs passive control, so that the gasoline soot filter 200 is regenerated at a temperature or condition where the gasoline soot filter 200 can be regenerated according to the driving conditions of the vehicle. It is controlled to perform (S600).

However, if the condition in which passive control is not performed, it is determined whether the first step is HCU active control condition (S620).

In the case of HCU active control of the present invention, it is configured to be divided into first to fourth stages (S620 to S640), according to the measured amount of gasoline soot filter 200, the first stage HCU active control to the first It can be configured to set up a four-level HCU active control.

It is determined whether it is the first step HCU active control (S610), and if it is not in the first step HCU active control state, it is determined whether it is the second step HCU active control (S620).

If it is not the second-stage HUC active control (S620), it is determined whether the third-stage HCU active control state (S630), and if it is not the third-stage HCU active control state, it is determined whether the fourth-stage HCU active control state. (S640).

Step 4 If not in the HCU active control state, the step of determining whether the EMS active control state (S650) is sequentially performed.

That is, in one embodiment of the present invention, a control method is set as a GPF playback method according to the state of the vehicle, and in order to perform the GPF playback, each control state is sequentially determined.

Specifically, in the case of performing the first step HCU active control (S610), it is configured to increase the driving speed of the engine 100 by downwardly changing the number of shifts of the transmission 140 (S611), and driving the engine 100 As the speed increases, the temperature rise of the gasoline soot filter 200 is induced.

When the temperature of the heated gasoline soot filter 200 exceeds the second reference temperature (S612), regeneration of the gasoline soot filter 200 is performed (S700), and when the temperature is lower than the second reference temperature (S612), gasoline soot The temperature change amount of the filter 200 determines the first temperature change amount (S613).

When the temperature change amount of the gasoline soot filter 200 is greater than or equal to the first temperature change (S613), the downward control of the transmission 140 is performed again (S611), and the temperature change amount of the gasoline soot filter 200 is less than the first temperature change In case (S613), it is configured to perform the second step HCU active control (S620).

When the second stage HCU active control is performed (S620), the driving point of the engine 100 is controlled to be upward, and the driving point is controlled to move the driving point with the maximum torque at which the EGR is driven (S621). ).

When the temperature of the second-stage heated gasoline soot filter 200 exceeds the third reference temperature (S622), regeneration of the gasoline soot filter 200 is performed (S700), and when the temperature is below the third reference temperature, gasoline soot The temperature change amount of the filter 200 determines the second temperature change amount (S623). When the temperature change amount of the gasoline soot filter 200 is greater than or equal to the second temperature change amount, the engine 100 is driven with the operating point upwardly controlled (S621), and the temperature change amount of the gasoline soot filter 200 is the second temperature change amount If less than (S623), it is configured to perform the third step HCU active control (S630).

In the case of the third-stage HCU active control (S630), the engine clutch 110 is configured to relieve the bonding conditions, and the battery 150, regardless of the SOC condition, when the motor 120 is at a constant speed or higher, the engine clutch 110 It is controlled to increase the time in which the engine 100 is turned on by maintaining the bonding (S631).

It is configured to increase the temperature of the gasoline soot filter 200 as the engine 100 is turned on, and is configured to compare with the fourth reference temperature (S632).

When the temperature of the gasoline soot filter 200 heated through the third stage HCU active control exceeds the fourth reference temperature (S632), regeneration of the gasoline soot filter 200 is performed (S700), and the fourth reference temperature In the following case (S632), it is determined whether the temperature change amount of the gasoline soot filter 200 is less than the third temperature change amount (S633).

When the temperature change amount of the gasoline soot filter 200 is greater than or equal to the third temperature change (S633), the third stage HCU active control maintains the engine clutch 110 junction control (S631), and the temperature change amount of the gasoline soot filter 200 When it is less than the third temperature change (S633), it is configured to perform the fourth step HCU active control (S640).

In the case of the fourth step HCU active control (S640), the engine clutch 110 is controlled to be continuously engaged regardless of the bonding conditions, and thus the engine 100 is controlled to maintain the on state (S641).

When it is determined that the temperature of the gasoline soot filter 200 controlled as described above exceeds the fifth reference temperature (S642), it is configured to perform regeneration of the gasoline soot filter 200 (S700), and the controlled gasoline soot filter When the temperature of (200) is below the fifth reference temperature (S642), the step of comparing the temperature change amount of the gasoline soot filter 200 with the fourth temperature change amount (S643).

When the temperature change amount of the gasoline soot filter 200 is greater than or equal to the fourth temperature change (S643), the fourth stage HCU active control is maintained (S641), and the temperature change amount of the gasoline soot filter 200 is less than the fourth temperature change amount (S643), it is determined that the gasoline soot filter 200 cannot be recycled (S710).

In addition, it is configured to perform EMS active control when the soot amount is determined to exceed the second reference value, and does not satisfy the fourth stage HCU active control condition (S650), maintaining the on state of the engine 100 In addition, delaying the ignition timing of the engine 100 performs perceptual combustion, and controls the air-fuel ratio to induce a temperature increase of the gasoline soot filter 200 (S651). Preferably, in the case of the air-fuel ratio control, it means that fuel injection is leanly controlled.

When the temperature of the gasoline soot filter 200 heated by performing the EMS active control exceeds the sixth reference temperature (S652), and the regeneration of the gasoline soot filter 200 is performed (S700), and the temperature is below the sixth reference temperature. (S652), it is determined that the regeneration of the gasoline soot filter 200 is not possible (S710).

As disclosed above, in the case of the HCU active control and the EMS active control including the first to fourth stages, it is configured to perform the regeneration of the gasoline soot filter 200 by determining the reference temperature and the amount of temperature change respectively set as the temperature condition do.

6 is a flowchart of a regeneration control method for performing regeneration of the gasoline soot filter 200 as an embodiment of the present invention.

3 to 5, when the regeneration condition of the gasoline soot filter 200 is satisfied by performing temperature increase determination and temperature control of the gasoline soot filter 200, regeneration of the gasoline soot filter 200 is performed. In performing the regeneration of the gasoline soot filter 200, a step (S810) of determining whether the speed of the first motor 120 exceeds the first reference speed. In addition, when the speed of the motor 120 exceeds the first reference speed (S810), it includes the step of determining whether the speed of the vehicle exceeds the second reference speed (S820).

When the speed of the motor 120 exceeds the first reference speed and the speed of the vehicle exceeds the second reference speed, it is configured to regenerate the gasoline soot filter 200 by performing passive driving (S830). As a regeneration method for performing the passive driving, the engine clutch 110 is configured to regenerate the gasoline soot filter 200 in a state where the fuel cut of the engine 100 is maintained while the engine clutch 110 is locked up. The speed of 100) is interlocked to minimize heterogeneity.

When the gasoline soot filter 200 is regenerated by performing passive driving (S830), it is determined whether the vehicle speed is less than the third reference speed, and the logic is terminated when the vehicle speed is less than the third reference speed (S840). (S900). When the vehicle speed is greater than or equal to the third reference speed (S840), the passive driving of the vehicle is maintained (S830).

When the speed of the motor 120 is equal to or less than the first reference speed, a step (S811) of performing regeneration of the gasoline soot filter 200 through driving the motor 120 is included. The step of performing the regeneration of the gasoline soot filter 200 through driving the motor 120 is configured to maintain the number of stages of the transmission 140 in the neutral state while maintaining the lockup of the engine clutch 110, and the motor 120 The engine 100 is driven by the gasoline soot filter 200 is regenerated.

In the case of a regeneration method through driving of the motor 120, when an accelerator petal input exists according to a user's request (S812), the regeneration is configured to end (S900).

Finally, when the speed of the motor 120 exceeds the first reference speed (S810), and the vehicle speed is less than or equal to the second reference speed (S820), regeneration of the gasoline soot filter 200 through driving the HSG 130 It includes a step (S821).

The step of regenerating the gasoline soot filter 200 through driving the HSG 130 is configured to apply the torque of the engine 100 through the HGS in a state in which the lock-up of the engine clutch 110 is released (S821). The step of regenerating the gasoline soot filter 200 through driving the HSG 130 can drive the engine 100 at a constant RPM, so control stability is greater than other regeneration methods. In addition, since the engine clutch 110 maintains the released state, it is possible to perform separate control from driving of the vehicle through the motor 120.

However, it is determined that the engine clutch 110 is required to be tightened (S822), and if the engine clutch 110 is not required to be fastened, the regeneration of the gasoline soot filter 200 is maintained by driving the HSG 130 and (S821), when it is required to fasten the engine clutch 110, the logic is terminated (S900).

As described above, when the temperature increase condition of the gasoline soot filter 200 is satisfied, the controller 300 of the present invention is a method for regenerating the gasoline soot filter 200, a passive driving method, a regeneration method through driving the motor 120, and The combustion of the suit is performed by selectively applying the regeneration method through the HSG 130 driving, so that the gasoline soot filter 200 can be regenerated according to the speed of the motor 120 and the speed condition of the vehicle.

The above detailed description is to illustrate the present invention. In addition, the above-described content is to describe and describe preferred embodiments of the present invention, and the present invention can be used in various other combinations, modifications and environments. That is, it is possible to change or modify the scope of the concept of the invention disclosed herein, the scope equivalent to the disclosed disclosure, and/or the scope of the art or knowledge in the art. The described embodiments describe the best state for implementing the technical spirit of the present invention, and various changes required in specific application fields and uses of the present invention are possible. Therefore, the detailed description of the above invention is not intended to limit the present invention to the disclosed embodiments. In addition, the appended claims should be construed to include other embodiments.

100: engine
110: engine clutch
120: motor
130: HSG
140: transmission
150: battery
160: inverter
200: gasoline soot filter
300: control unit

Claims (11)

An engine that provides driving force by burning gasoline fuel;
HSG for starting the engine and acting as a generator when braking to generate electrical energy;
A driving motor engaged with the engine through an engine clutch and providing driving force;
A battery that stores electrical energy and provides the electrical energy in the starting generator and the driving motor;
A gasoline particulate filter (GPF) for purifying exhaust gas discharged from the engine; And
The gasoline soot filter is heated by selectively controlling the engine, motor, transmission, and HSG according to the soot amount and temperature condition of the gasoline soot filter, and regeneration is performed at a temperature above the regeneration performance of the heated gasoline soot filter. A control unit configured to; GPF reproducing apparatus of a hybrid vehicle comprising a.
According to claim 1,
The control unit controls the passive control of maintaining the fuel cut of the engine in a state where the engine clutch is joined when the soot amount of the gasoline soot filter is less than or equal to the first reference value and the temperature of the gasoline soot filter exceeds the first reference temperature. GPF regeneration device of a hybrid vehicle, characterized in that to perform the regeneration of gasoline soot filter.
According to claim 1,
When the soot amount of the gasoline soot filter exceeds the first reference value to the second reference value or less, the control unit performs at least one of downshifting, shifting the engine operating point, maintaining the engine clutch joint, and maintaining the engine on state control. GPF regeneration device of a hybrid vehicle, characterized in that to perform the heating of the filter.
According to claim 1,
When the amount of soot in the gasoline soot filter exceeds the second reference value, the control unit
GPF regeneration device of a hybrid vehicle, characterized in that to perform the ignition timing delay or air-fuel ratio control in the engine-on state to increase the temperature of the gasoline soot filter.
According to claim 3,
The control unit sequentially changes the shift stage, the engine operating point upward, the engine clutch junction maintenance, and the engine on state maintenance change control in sequence as the temperature of the gasoline soot filter increases.
Determining the amount of soot in the gasoline soot filter;
If the soot amount is less than or equal to the first reference value, passive control is performed when the temperature of the gasoline soot filter exceeds the first reference temperature, and if the soot amount exceeds the first reference value or less than the second reference value, HCU active control is performed. If the second reference value is exceeded, performing EMS active control;
Measuring the temperature of the gasoline soot filter according to the control;
When the temperature of the gasoline soot filter is above the regeneration performance temperature, regenerating a gasoline soot filter; GPF regeneration method of a hybrid vehicle comprising a.
The method of claim 6,
In the step of performing the HCU active control,
When the temperature of the gasoline soot filter is below the regeneration performance temperature, in accordance with the temperature condition of the gasoline soot filter, the number of shift stages is downwardly changed, the engine operating point is increased, the engine clutch junction maintenance and the engine on state maintenance control are sequentially performed. A method for reproducing GPF in a hybrid vehicle, which is characterized by its characteristics.
The method of claim 7,
Temperature conditions of the gasoline soot filter,
And a temperature change amount of the gasoline soot filter and a temperature change amount of the gasoline soot filter.
The method of claim 6,
When the temperature of the gasoline soot filter is above the regeneration performance temperature, in the step of regenerating the gasoline soot filter,
Determining whether the motor speed is greater than or equal to the first reference speed;
If the motor is less than the first reference speed, performing regeneration of a gasoline soot filter through motor driving, and if the motor is greater than or equal to the first reference speed, determining whether the vehicle speed is greater than or equal to the second reference speed;
When the speed of the vehicle is greater than or equal to the second reference speed, the engine is switched to the passive regeneration mode for fastening the engine clutch in the fuel cut state, and when the speed of the vehicle is less than the second reference speed, the gasoline soot filter through HSG driving The step of performing the playback; GPF playback method of a hybrid vehicle comprising a.
The method of claim 9,
When the motor is less than the first reference speed, in the step of performing regeneration of the gasoline soot filter through motor driving,
Determining an input of a user's accelerator pedal sensor (APS);
In the step of determining the input of the user's accelerator pedal sensor (APS), if there is no input of the user's accelerator pedal sensor (APS), the motor is driven to operate the gasoline soot filter. A method of reproducing a GPF of a hybrid vehicle, comprising: reproducing and terminating logic when an input of an accelerator pedal sensor (APS) of the user exists.
The method of claim 9,
When the speed of the vehicle is less than the second reference speed, in the step of performing regeneration of the gasoline soot filter through HSG driving,
Determining whether an engine clutch fastening is required for raising the gasoline soot filter;
Maintaining the regeneration of the gasoline soot filter through HSG driving when the temperature rise of the gasoline soot filter is not required; And
When the heating of the gasoline soot filter is required, performing an engine clutch lock-up and terminating the logic; GPF regeneration method of a hybrid vehicle comprising a.

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