KR101755472B1 - Apparatus and method for learning of hybrid vehicle - Google Patents

Abstract

The present invention relates to a learning method and apparatus for a hybrid vehicle. The present invention satisfies either the first learning condition for entering the running mode in which the engine is turned off in the start-on state by the ignition key and the engine starting-on state, and the second learning condition for entering the other- Determining whether the opening degree of the intake control valve satisfies the first learning condition, deciding whether or not to proceed with learning of the opening degree of the intake control valve according to the learning value, And determining whether the learning progress of the intake control valve is progressed according to the cumulative number of learning times of the intake timing control valve.

Description

[0001] APPARATUS AND METHOD FOR LEARNING OF HYBRID VEHICLE [0002]

The present invention relates to a learning method and apparatus for a hybrid vehicle, and more particularly, to a learning method and apparatus for a hybrid vehicle using a diesel engine.

A hybrid vehicle is an automobile that uses two or more different kinds of power sources, and generally means a vehicle driven by an engine that obtains a driving force by burning fuel and a motor that obtains a driving force by battery power.

When a diesel engine is used, the exhaust gas recirculation (EGR) valve for reducing the exhaust gas due to the characteristics of the diesel engine, the swirl for improving the output of the engine A swirl control valve (SCV), and an air control valve (ACV) for vibration reduction of the vehicle.

Diesel hybrid vehicles combine nitrogen and oxygen contained in the air at high temperature combustion temperatures, producing toxic nitrogen oxides (NOx). To reduce such nitrogen oxides (NOx), the diesel hybrid vehicle adjusts the opening amount of the exhaust gas recirculation valve to recycle a part of the exhaust gas to the intake manifold.

However, when particulate matter such as various incompletely burnt soot contained in the exhaust gas is sucked to the intake side of the engine through the exhaust gas recirculation valve, the phenomenon that the soot component is deposited on the inflow path of the exhaust gas recirculation valve Occurs. In this case, the inflow path of the exhaust gas recirculation valve is continuously narrowed due to the deposited soot.

Therefore, if the exhaust gas recirculation valve opening / closing amount is adjusted in anticipation of the amount of exhaust gas under the assumption that the exhaust gas recirculation valve is new, the emission reference value may be exceeded if the flow path of the exhaust gas recirculation valve becomes narrow .

In addition, in a diesel hybrid vehicle, the fuel injected in the engine is combusted by vibration of the engine due to the diesel engine moving inertially when the ignition key is off. In order to prevent the engine from vibrating, the diesel hybrid vehicle is equipped with an air control valve at the front end of the intake manifold, and controls the opening amount of the air control valve so as to block the intake air in the diesel engine to prevent combustion.

In order to prevent the diesel oxidation catalyst from being damaged at high temperature during the regeneration of the diesel particulate filter (DPF) for exhaust gas reduction, the opening amount of the air control valve is adjusted to maintain the proper temperature.

However, when particulate matter such as soot is sucked into the intake manifold through the exhaust gas recirculation valve, some of the vapor components cause the phenomenon to be adhered to the air control valve. In this case, the inflow path of the air control valve becomes narrow due to the deposited soot.

The air control valve was also controlled in anticipation of the amount of exhaust gas under the assumption that it was new. However, as described above, if the inflow path of the air becomes narrow, the existing emission mapping may cause a problem exceeding the emission reference value.

And diesel hybrid vehicles apply swirl control valve to accelerate air flow in the combustion chamber. The swirl control valve is a valve installed in the intake manifold. By changing the direction of the valve, the intake port is changed to the swirl port, or a general suction port is used to improve the engine output and the fuel consumption rate.

Generally, the engine is slow in up and down movement of the piston during low speed, so the intake air flow rate is slow and it is difficult to uniformly form the mixer. Further, in order to reduce the ignition delay, it is necessary to increase the intake flow rate and the flame speed. As the inspiratory flow rate increases, the air and fuel mixes well and the flame speed increases. If a uniform mixture is formed quickly, the occurrence of soot (PM: Particulate Matters) is reduced.

In order to form a uniform mixture, the position and angle of the intake port are important. When two intake passages are formed in a small size and one intake passageway is closed, the intake speed is increased and vortex formation in the cylinder can be induced.

Thus, in order to quickly form the air-fuel ratio, the swirl control valve is installed in the intake manifold to accelerate air flow in the combustion chamber. As a result, the ignition delay is reduced, nitrogen oxides are reduced, and the exhaust gas recirculation (EGR) control region can be widened.

That is, in the idling or medium load region (3000 rpm or less) where the flow rate is slow, the swirl control valve is closed to increase the mixing ratio and reduce the generation of soot and nitrogen oxides. In addition, in the high load region (exceeding 3000 rpm), the swirl control valve can be opened to increase the filling efficiency and improve the output of the engine by reducing the pumping loss.

However, if the flow path of the swirl control valve becomes narrow due to the swallow soot deposited on the swallow control valve, existing emission mapping may cause a problem exceeding the emission reference value.

Therefore, after the ignition key is turned off, the exhaust gas recirculation valve, the air control valve, and the swirl control valve are forcibly opened and closed several times, and the accumulation amount of the soot component in the inflow path is monitored.

However, the driver can feel the discomfort after recognizing the noise due to learning after turning off the ignition key and getting off the vehicle. Also, in the case of a hybrid vehicle, the engine frequently turns off in the on state of the ignition key. For example, when the hybrid vehicle is switched from an HEV (Hybrid Electric Vehicle) mode driven by an engine and a motor to an EV (Electric Vehicle) mode driven by a motor, the engine is turned off.

However, in the case of a hybrid vehicle, since learning proceeds only in the OFF condition of the ignition key, the learning behavior does not proceed even if the engine is turned off. As a result, even when the engine is frequently turned off, the soot component is continuously deposited when learning about the exhaust gas recirculation valve, the air control valve, and the swirl control valve is not advanced.

In general, soot components maintain a dry state at a high temperature and have a sticky property in a wet state at a low temperature. Therefore, when the learning operation is not performed, the soot component is deposited in a wet state. Therefore, even if learning is performed after the ignition key-off, the chipping effect may deteriorate or the learning may not proceed normally and a failure may occur.

Accordingly, when the learning is progressed every time the engine is turned off in the hybrid vehicle, it may be inconvenient for the driver due to the noise of the operation of the motor driving the exhaust gas recirculation valve, the air control valve, and the swirl control valve.

Embodiments of the present invention provide a hybrid vehicle learning method and apparatus capable of reducing noise generated during learning operations of an exhaust gas recirculation valve, a swirl control valve, and an air control valve of a hybrid vehicle using a diesel engine.

Further, the embodiment of the present invention provides a learning method and apparatus for a hybrid vehicle that can prevent a valve failure due to a stacked suit caused by a collapsing effect on particulate matter such as a soot even if the vehicle runs in a running mode in which the engine is turned off for a long time do.

A learning method of a hybrid vehicle including an engine, a motor, an ignition switch for outputting status information of an ignition key, and an intake control valve for controlling intake air introduced into the engine according to an embodiment of the present invention, A first learning condition for entering a running mode in which the engine is turned off in a start-on state and a start-up state of the engine, and a second learning condition for entering a second-run mode at a predetermined reference speed step; Determining whether an opening amount of the intake control valve is dampened when the first learning condition is satisfied, and determining whether learning progress is made on the opening amount of the intake control valve according to the learning value; And determining whether learning of the opening amount of the intake control valve is progressed according to the cumulative learning number of the intake control valve when the second learning condition is satisfied.

The step of determining whether the learning progress is performed when the first learning condition is satisfied includes the steps of: setting a learning progress condition variable to a first value when the learning value is greater than a preset reference value; Setting the learning progress condition variable to a second value when the learning value is smaller than a preset reference value; And advancing learning about the opening amount of the intake control valve when the learning progress condition variable is set to the first value when entering the first learning condition.

The step of learning the amount of opening of the intake control valve may include: determining whether the amount of closing of the cover of the intake control valve varies; And temporarily storing the cover closing amount when a variation in the cover closing amount is detected.

In addition, the step of determining whether the learning progresses when the second learning condition is satisfied

And advancing learning about the opening amount of the intake control valve when the cumulative learning number is less than a preset reference number.

Here, the reference number is a number of times set based on one running cycle of the hybrid vehicle. The step of learning about the amount of opening of the intake control valve when the second learning condition is satisfied and the cumulative learning number is smaller than the reference number may include a step of determining whether the driving pattern of the hybrid vehicle is a low- Determining whether the driving pattern is one of the driving patterns; And opening and closing the intake control valve at a predetermined number of opening and closing times according to the traveling pattern.

The number of opening and closing times is set so that the medium-and-high-speed running pattern is smaller than the medium-and-high-speed running pattern. The determining of the traveling pattern of the hybrid vehicle may include detecting a traveling time ratio of each of the first to third speed sections for each traveling cycle; Wherein an average value of the ratios of the total running times in the first speed section to the driving cycle is greater than a preset first reference value or an average value of the ratios of the running times in the first and second speed sections Determining that the traveling pattern is the middle / low speed traveling pattern if the traveling pattern is larger than the second reference value; And an average value of the total running time ratios of the running cycles in which the average value of the ratios of the running ratios in the first and second speed ratios is greater than a third reference value, And determining that the traveling pattern is the middle speed traveling pattern if the value is greater than the fourth reference value.

The first speed section is less than 50 km / h, the second speed section is less than 100 km / h from 50 km / h, the third speed section is more than 100 km / h, %, The second reference value is 90%, the third reference value is 70%, and the fourth reference value is 80%.

Further comprising stopping the learning at the exit of the other travel mode after the step of learning, wherein the engine is a diesel engine, and the intake control valve includes an exhaust gas recirculation valve, a swirl control valve, And a valve. Further, the reference speed is 50 km / h, and the first learning condition includes a condition for switching from the HEV mode running on the engine and the motor to the EV mode running on the motor. The hybrid vehicle is a mild type that operates as a start motor and a generator that causes the motor to turn on the engine, and the first learning condition includes a condition that the mild hybrid vehicle enters the other traveling mode.

Further, a learning apparatus for a hybrid vehicle according to an embodiment of the present invention includes a diesel engine; motor; An ignition switch for outputting status information of the ignition key; An intake control valve for regulating intake air flowing into the diesel engine; And a second learning condition for entering a traveling mode in which the diesel engine is turned off in a starting-on state of the diesel engine and a second learning condition in which the vehicle enters a traveling- And a controller for selectively learning the amount of opening of the intake control valve when one of the intake control valves is satisfied.

Here, the controller may be operable to vary the opening amount of the intake control valve according to the closing amount of the cover of the intake control valve when the first learning condition is satisfied. If the learning value is greater than a preset reference value, 1 ', and sets the learning progress condition variable to' 0 'when the learned value is smaller than the reference value, and sets the opening amount of the intake control valve when the learning progress condition variable is set to' 1 ' .

If the cumulative learning count for the intake control valve during the driving cycle of the hybrid vehicle satisfies the second learning condition, the controller determines that the intake stroke of the intake valve is greater than a predetermined reference number, The control valve is opened and closed, and the amount of opening of the intake control valve is learned.

In addition, the controller divides the driving pattern of the hybrid vehicle into a medium-low speed running pattern and a medium speed running pattern, and sets the number of times of opening and closing of the medium and high speed running pattern to be smaller than that of the medium / low speed running pattern. Here, the intake control valve includes at least one of an exhaust gas recirculation valve, a swirl control valve, and an air control valve.

The embodiment of the present invention can prevent the driver from recognizing the noises due to learning by learning the exhaust gas recirculation valve, the swirl control valve, and the air control valve during driving of the engine.

Further, the embodiment of the present invention can prevent the occurrence of a chipping effect and a valve failure due to the accumulation of particulate matter such as soot, because learning can be performed even when the vehicle is running for a long time in a running mode in which the engine is turned off.

Further, the embodiment of the present invention can improve the durability of the hardware device in the vehicle by limiting the number of times of learning in one driving cycle, and can reduce the number of noise generation by learning.

1 is a block diagram showing a system of a general hybrid vehicle to which an embodiment of the present invention is applied;
2 is a block diagram schematically showing a learning apparatus of a hybrid vehicle according to an embodiment of the present invention;
3 is a flowchart showing a learning method of a hybrid vehicle according to an embodiment of the present invention;
4 is a graph showing the learning behavior of the exhaust gas recirculation valve 52 according to the embodiment of the present invention.
5 is a graph showing the learning behavior of the swirl control valve 54 and the air control valve 56 according to the embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention in the drawings, parts not related to the description are omitted. Like numbers refer to like parts throughout the specification.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a system of a general hybrid vehicle to which an embodiment of the present invention is applied.

1, the hybrid system to which the embodiment of the present invention is applied includes an HCU 10, an ECU 12, an MCU 14, a TCU 16, an engine 20, an engine clutch 22, a motor 24 ), A transmission 26, and a battery 28. As shown in FIG.

The HCU 10 is a top-level controller for controlling the driving control of the other controllers, the hybrid driving mode setting, and the overall operation of the hybrid vehicle. Each controller is connected to a high-speed CAN communication line to exchange information with each other, Thereby controlling the output torque of the engine 20 and the motor 24. [

The ECU 12 controls the overall operation of the engine 20 according to the engine state information such as the driver's required torque signal, the cooling water temperature, and the engine torque.

The MCU 14 controls the overall operation of the motor 24 in accordance with the driver's required torque signal, the hybrid vehicle's running mode and the state of charge (SOC) of the battery 28.

The TCU 16 controls the overall operation of the transmission 26 by controlling the speed ratio according to the output torque of the ECU 12 and the MCU 14 and determining the amount of regenerative braking.

The engine 20 outputs power in the start-up state as a power source. The engine 20 according to the embodiment of the present invention may be a diesel engine.

The engine clutch 22 is disposed between the engine 20 and the motor 24 and receives the control signal of the HCU 10 to selectively connect the engine 20 and the motor 24 according to the running mode of the hybrid vehicle .

The motor 24 is operated by a three-phase alternating-current voltage applied through an inverter in the battery 28 to generate torque, and operates as a generator in regenerative driving to supply regenerative energy to the battery 30. [

The transmission 26 is supplied with the input torque as the sum of the output torque of the engine 20 and the output torque of the motor 24 determined according to the engagement and disengagement of the engine clutch 22, The speed change stage is selected and the drive is maintained by outputting the drive force to the drive wheels.

The battery 28 is composed of a plurality of unit cells, and a high voltage for providing a voltage to the motor 24, for example, a voltage of 400 V to 450 V direct current is stored.

In the hybrid vehicle having the above-described configuration, the hybrid vehicle provides a running mode in which the engine 20 and the motor 24 operate separately or simultaneously as a power source. For example, the hybrid vehicle may provide an HEV (Hybrid Electric Vehicle) mode using the engine 20 and the motor 24 as a power source at the same time, an EV (Electric Vehicle) mode using only the power source of the motor 24, and the like.

The hybrid vehicle may also be of the mild type that operates as a starter motor that turns on the start of the engine 10 and a generator that charges the battery 28, A drive motor for driving the vehicle, and may be a hard type separately provided with a generator for starting and generating the engine 10.

2 is a block diagram schematically showing a learning apparatus for a hybrid vehicle according to an embodiment of the present invention.

Referring to FIG. 2, a hybrid vehicle learning apparatus according to an embodiment of the present invention includes a data detection unit 30, an ignition switch 40, an intake air control valve 50, and a controller 60. Here, the controller 60 may include the HCU 10 and the ECU 12 shown in Fig.

The data detecting unit 30 includes an accelerator position sensor (APS) 32 and a vehicle speed sensor 34. [ The accelerator pedal sensor 34 measures the position value of the accelerator pedal (the degree to which the accelerator pedal is depressed) and transmits the measured signal to the HCU 10. When the accelerator pedal is fully depressed, the position value of the accelerator pedal is 100%, and when the accelerator pedal is not depressed, the position value of the accelerator pedal may be 0%. The vehicle speed sensor 34 detects the speed of the hybrid vehicle, and transmits the detected signal to the HCU 10.

The ignition switch 40 transmits the selection information of the ignition ON or the ignition off of the hybrid vehicle to the HCU 10 by the ignition key.

The intake air control valve 50 is mounted at a predetermined position of the intake manifold in the engine 20 and is controlled by the ECU 12 to regulate the state of the intake air flowing into the engine 20. [ The intake air control valve 50 includes an exhaust gas recirculation valve 52 for regulating the amount of exhaust gas recirculated to the engine 20, a swirl control valve 54 for guiding the swirl of the intake air, And an air regulating valve 56 for regulating the air flow rate.

Each of the exhaust gas recirculation valve 52, the swirl control valve 54 and the air control valve 56 is equipped with a flap and the degree of closing of the lid can be adjusted by the ECU 12. When particulate matter such as various incompletely burned soot is deposited on the wall surface of each of the exhaust gas recirculation valve 52, swirl control valve 54 and air control valve 56, The degree of closure may vary compared to the amount of cover closure.

The HCU 10 controls the running mode of the hybrid vehicle and turns off the engine 20 to the ECU 12 when the running mode of the hybrid vehicle is switched from the HEV mode to the EV mode during start- And provides status information indicating that the engine 20 is in the OFF state in accordance with the switching from the HEV mode to the EV mode.

When the hybrid vehicle meets the first learning condition in which the engine 20 is turned off while the ignition key is turned on, the ECU 12 performs learning according to the opening amount of the intake air control valve 50 .

Here, the first learning condition includes a condition in which the current state of the vehicle is switched from the HEV mode to the EV mode, or the state in which the engine 20 is turned off by the state in which the mild hybrid vehicle enters the other traveling mode. Here, if the driver does not step on the accelerator pedal, the mild hybrid vehicle enters a coasting running mode in which the vehicle runs at inertia to save fuel economy.

The mild hybrid vehicle turns off the engine 20 and stops the fuel injection of the engine 20 in the other running mode. Since the vehicle travels inertially in such a lane travel mode, even if the exhaust gas recirculation valve 52, the intake swirl control valve 54, and the air control valve 56 are controlled to be in a closed state, the behavior of the vehicle is not affected.

The ECU 12 learns the amount of opening of the intake air control valve 50 upon entry into the first learning condition. At this time, the ECU 12 temporarily stores the humorous value in a memory (not shown) or the like, without reflecting it to the actual learning value. Then, the ECU 12 sets the learning progress parameter (set) to '1' when the learned value is larger than the predetermined reference value, and sets the learning progress parameter (set) when the learned value is smaller than the reference value Set to '0'.

Here, the reference value is a value set to determine whether the difference (offset value) between the initial lid closing amount of the intake air control valve 50 and the detected lid closing amount is a degree requiring learning behavior. To this end, the ECU 12 can sense the closing amount of the cover of the intake air control valve 50 through a position sensor (not shown) installed in the intake air control valve 50.

When the learning value is physically higher than the reference value, the learning progress condition variable (set) is set such that learning of the intake air control valve 50 in the first learning condition It is a variable that is set to allow the behavior to proceed.

When the hybrid vehicle satisfies the second learning condition in which the hybrid vehicle enters the other traveling mode while traveling at a speed higher than the reference speed, the ECU 12 controls the exhaust gas recirculation valve 52, It is determined whether or not to progress the learning according to the cumulative learning count for each of the swirl control valve 54 and the air control valve 56.

Here, the reference speed can be set to about 50 km / h. That is, it is possible to satisfy the second learning condition even in the case of a vehicle that only runs in the city, and it is possible to prevent a situation in which the learning time can not be sufficiently secured by switching to the general running mode as soon as the vehicle enters the other running mode at low speed.

Further, in the case where the vehicle frequently enters the other traveling mode in one traveling cycle, learning does not need to proceed every time the vehicle enters the other traveling mode. Therefore, the embodiment of the present invention can improve the durability of the in-vehicle hardware device by limiting the number of times of learning in one driving cycle. For example, the reference number of times may be set to three, and only a maximum of three learning operations may be performed in one driving cycle.

In addition, when the number of cumulative learning times is less than the reference number at the time of entry into the second learning condition, the ECU 12 controls the opening / closing of the intake air control valve 50 according to whether the traveling pattern of the hybrid vehicle is a medium- Determines the number of times, controls the lid of the intake air control valve 50 according to the determined number of times of opening and closing, and then proceeds the learning.

To this end, the ECU 12 detects a running time ratio for each of the first to third speed sections T1 to T3 for one running cycle. For example, the first speed section T1 is a low speed section of less than 50 km / h, the second speed section T2 is a medium speed section of more than 50 km / h to less than 100 km / h, the third speed section T3 is 100 km / h < / RTI > The ECU 12 detects the running time ratio for each speed section during one running cycle.

For example, as shown in the following Table 1, when the first traveling cycle is 1 hour and the time traveled at less than 50 km / h is 20 minutes, a1 corresponds to 1/3, and from 50 km / h to less than 100 km / h If the travel time is 20 minutes, b1 corresponds to 1/3, and if the travel time is more than 100 km / h in 20 minutes, c1 is 1/3.

Number of driving cycles T1 T2 T3 One a1 b1 c1 2 a2 b2 c2 3 a3 b3 c3 ... ... ... ... n moment bn cn

Then, the ECU 12 determines whether or not the average of the ratios of the ratios of the ratios of the ratios of the ratios of the ratios of the ratios of the ratios of the ratios of the ratios of the ratios of the ratios of the ratios of the ratios of the ratios of the ratios of the ratios of the ratios of the ratios, Speed travel pattern when the sum of the average of the ratios and the average of the ratios of the total travel times traveling in the second speed region is larger than the second reference value R2.

Here, the first reference value R1 may be set to 50%, and the second reference value R2 may be set to 90%. That is, when the running pattern of the hybrid vehicle corresponds to the following equation (1) or (2), the ECU 12 can determine that the running pattern is a medium or low speed running pattern.

Further, the ECU 12 determines whether the sum of the average of the ratios of the total running time in the first speed section and the average of the ratios of the running time in the second speed section during the n running cycles is smaller than the third reference value R3 Or the sum of the average of the ratios of the total travel time traveled in the second speed zone and the average of the ratios of the travel times traveled in the third speed zone is greater than the fourth reference value R4, .

Here, the third reference value R3 may be set to 70%, and the fourth reference value R4 may be set to 80%. That is, when the running pattern of the hybrid vehicle corresponds to the following (Equation 3) or (Equation 4), the ECU 12 can judge the running pattern as the middle speed running pattern.

The ECU 12 can determine the number of times of opening and closing three times in the case where the traveling pattern of the hybrid vehicle is a medium to low speed pattern and determine the number of times of opening and closing once in the case of the middle speed traveling pattern. That is, in the case of a vehicle with a high-speed traveling, particulate matter such as soot incompletely burnt in the exhaust gas discharged after the explosion stroke in the engine 20 can not be discharged to the rear end of the muffler, There is a high possibility of being deposited on components disposed in the passage.

On the other hand, in the case of a vehicle having a large number of high-speed travels, particulate matter such as soot in the exhaust gas discharged after the explosion stroke in the engine 20 is likely to be discharged to the rear end of the muffler. Accordingly, in the embodiment of the present invention, when the traveling pattern of the hybrid vehicle is a medium to low speed pattern, the lid of the intake air control valve 50 is opened and closed more frequently than the middle and low speed patterns to clog particulate matter such as soot, To be discharged to the rear end.

3 is a flowchart showing a learning method of a hybrid vehicle according to an embodiment of the present invention.

As shown in FIG. 3, the learning method of the hybrid vehicle according to the embodiment of the present invention starts with the ignition key in the on state and the engine 20 in the on-state (S301). Next, the ECU 12 determines the learning condition according to the current state of the hybrid vehicle (S302).

For example, when the current state of the hybrid vehicle is switched from the HEV mode to the EV mode, the HCU 10 instructs the ECU 12 to turn off the engine 20. At this time, the HCU 10 transmits state information indicating that the engine 20 is in the OFF state in accordance with the switching from the HEV mode to the EV mode.

Then, the ECU 12 turns off the engine 20 (S303), and determines that the current state of the hybrid vehicle satisfies the first learning condition when receiving the state information. Then, the ECU 12 detects whether the closing amount of the cover of the intake air control valve 50 changes or not (S304).

At this time, the ECU 12 controls the exhaust gas recirculation valve 52, the swirl control valve 54, and the air control valve 56 based on the initial cover closing amount when the exhaust gas recirculation valve 52, the swirl control valve 54, The swirl control valve 54, and the air control valve 56, respectively.

Then, the ECU 12 learns the opening amount of the intake air control valve 50 (S305). At this time, the ECU 12 performs an anti-judder operation on the swirl control valve 54 and the air control valve 56, and then can perform learning.

Then, the ECU 12 compares the dull value with a preset reference value and determines whether the learned value is greater than the reference value (S306). As a result of the determination, if the learning value is larger than the reference value, the ECU 12 sets the learning progress condition variable (set) to '1' (S307). On the other hand, if the learning value is smaller than the reference value, the ECU 12 sets the learning progress condition variable (set) to '0' (S308).

After the learning progress condition variable (set) is set, the ECU 12 determines whether the current state of the vehicle satisfies the first learning condition (S309). For example, when the ECU 12 receives the OFF command and the state information of the engine 20 from the HCU 10, it can determine that the current state of the vehicle satisfies the first learning condition.

Then, the ECU 12 turns off the engine 20 (S310). It is checked whether the learning progress condition variable (set) is set to '1' (S311). The ECU 12 learns the opening amount of the intake air control valve 50 when the learning progress condition variable (set) is set to '1' (S312).

4, the exhaust gas recirculation valve 52 is closed and the exhaust gas recirculation valve 52 is closed after the cleaning operation for repeatedly opening and closing the exhaust gas recirculation valve 52 is repeatedly performed. ), And learning to monitor the accumulation amount of the soot component in the inflow path proceeds.

This learning operation can prevent the phenomenon of exceeding the emission reference value by optimally controlling the engine combustion condition by monitoring the inflow path of the exhaust gas recirculation valve and changing the emission mapping value on the basis of the latest inflow route .

Further, the cleaning operation may dust the soot component deposited in the inlet path when the exhaust gas recirculation valve is closed, and remove the soot powder that has been exhausted through the intake air when the exhaust gas recirculation valve is opened.

5, the anti-judder operation for closing the valve for a certain period of time to reduce the vibration of the vehicle is performed after the operation of the swirl control valve 54 and the air control valve 56 is performed , Cleansing and learning proceeds.

Even if soot accumulates on each of the exhaust gas recirculation valve 52, the swirl control valve 54 and the air regulating valve 56 by such learning, it is possible to prevent the emission excess and maintain the optimum engine combustion condition .

That is, the ECU 12 according to the embodiment of the present invention does not perform learning when the learning progress condition variable (set) is '0', but performs the re-examination at the time of the next diagnosis (satisfying the first learning condition). Then, the ignition key is turned off (S313), and the ECU 12 is also turned off (S314). As described above, since the learning of the intake air control valve 50 does not proceed after the ignition key is turned off, the embodiment of the present invention can prevent a situation where the driver perceives noises due to learning after the driver comes down from the vehicle.

On the other hand, in step S302, the ECU 12 determines whether the current vehicle speed is equal to or greater than a preset reference vehicle speed (S315). As a result of the determination, if the current vehicle speed is equal to or greater than the reference vehicle speed, the ECU 12 determines whether the hybrid vehicle is in the other-run mode (S316). At this time, when the accelerator pedal position value is 0% and fuel injection to the engine 20 is stopped, the ECU 12 can determine that the running mode of the hybrid vehicle is the other running mode.

As a result of the determination, the ECU 12 determines that the current state of the vehicle satisfies the second learning condition, and determines whether the accumulated number of times of learning is less than a preset reference number (S317) . As a result of the determination, if the accumulated number of learning times is greater than the reference number, the learning is not performed (S318) and the process is terminated.

On the other hand, if the accumulated number of times of learning is less than the reference number, the ECU 12 determines the driving pattern of the driving pattern of the hybrid vehicle (S319). As a result of the determination, if the running pattern of the hybrid vehicle is the intermediate / low speed running pattern, the opening and closing of the intake air control valve 50 is repeated three times, and then the learning proceeds (S320). On the other hand, when the running pattern of the hybrid vehicle is the middle-speed running pattern, the ECU 12 repeats opening and closing of the intake air control valve 50 once and then proceeds to learning (S321).

Then, the ECU 12 immediately stops the learning when the current state of the hybrid vehicle is requested to switch from the other running mode to the normal running mode (S322). For example, the ECU 12 can judge that the accelerator pedal position value is greater than 1%, and that when the fuel injection to the engine 20 is started, the other travel mode is escaped. That is, when the driver presses the accelerator pedal and fuel injection is started to the engine 20, the ECU 12 immediately stops learning progress in the other travel mode and enters the normal travel mode. In this way, when the learning behavior is not stopped immediately, the driver recognizes that the responsiveness of the vehicle is delayed and can feel inconvenience.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

30:
40: Ignition switch
50: Intake air control valve
60:

Claims (21)

A learning method of a hybrid vehicle including an engine, an ignition switch for outputting status information of a motor and an ignition key, and an intake control valve for controlling intake air flowing into the engine,
A first learning condition for entering a running mode in which the engine is turned off in a start-on state by the ignition key and a start-up state of the engine, and a second learning condition for entering a second- Judging whether or not it is possible;
Determining whether an opening amount of the intake control valve is dampened when the first learning condition is satisfied, and determining whether learning progress is made on the opening amount of the intake control valve according to the learning value; And
Determining whether the learning progress of the intake control valve is progressed according to the cumulative learning count of the intake control valve when the second learning condition is satisfied
Wherein the learning of the hybrid vehicle comprises: The method according to claim 1,
The step of determining whether the learning progresses when the first learning condition is satisfied
Setting a learning progress condition variable to a first value when the learned value is greater than a preset reference value;
Setting the learning progress condition variable to a second value when the learning value is smaller than a preset reference value; And
When the learning condition variable is set to the first value at the time of entering the first learning condition, proceeding to learning about the opening amount of the intake control valve
Wherein the learning of the hybrid vehicle comprises: The method according to claim 1,
The step of learning the amount of opening of the intake control valve
Determining whether the closing amount of the cover of the intake control valve changes; And
Temporarily storing the closing amount of the cover when a variation in the closing amount of the cover is detected
Wherein the learning of the hybrid vehicle comprises: The method according to claim 1,
The step of determining whether the learning progress is performed when the second learning condition is satisfied
And learning the opening amount of the intake control valve when the cumulative learning number is smaller than a preset reference number. 5. The method of claim 4,
Wherein the reference number is a number of times set based on one driving cycle of the hybrid vehicle. 5. The method of claim 4,
The step of learning the amount of opening of the intake control valve when the second learning condition is satisfied and the cumulative learning number is less than the reference number
Determining whether the driving pattern of the hybrid vehicle is one of a medium speed running pattern and a medium speed running pattern; And
Opening and closing the intake control valve at a predetermined number of opening / closing times according to the traveling pattern
Wherein the learning of the hybrid vehicle comprises: The method according to claim 6,
Wherein the number of opening and closing times is set so that the medium and high speed running pattern is set to be smaller than that of the medium to low speed running pattern. The method according to claim 6,
The step of determining the traveling pattern of the hybrid vehicle
Detecting a running time ratio of each of the first to third speed sections preset for each driving cycle;
Wherein an average value of the ratios of the total running times in the first speed section to the driving cycle is greater than a preset first reference value or an average value of the ratios of the running times in the first and second speed sections Determining that the traveling pattern is the middle / low speed traveling pattern if the traveling pattern is larger than the second reference value; And
The average value of the ratios of the total running time in the first and second speed sections to the running cycle is greater than the third reference value or the average value of the running time ratios in the second and third speed sections Determining that the traveling pattern is the middle-speed traveling pattern when the traveling pattern is larger than the fourth reference value
Wherein the learning of the hybrid vehicle comprises: 9. The method of claim 8,
Wherein the first speed section is less than 50 km / h, the second speed section is less than 100 km / h from 50 km / h, and the third speed section is 100 km / h or more. 9. The method of claim 8,
Wherein the first reference value is 50%, the second reference value is 90%, the third reference value is 70%, and the fourth reference value is 80%. 5. The method of claim 4,
After the step of conducting the learning
And stopping the learning at the time of escape from the other traveling mode. The method according to claim 1,
Wherein the engine is a diesel engine. The method according to claim 1,
Wherein the intake control valve includes at least one of an exhaust gas recirculation valve, a swirl control valve, and an air control valve. The method according to claim 1,
Wherein the reference speed is 50 km / h. The method according to claim 1,
Wherein the first learning condition includes a condition for switching from the HEV mode running on the engine and the motor to the EV mode running on the motor. The method according to claim 1,
Wherein the hybrid vehicle is a mild type that operates as a start motor and a generator that causes the motor to turn on the engine,
Wherein the first learning condition includes a condition that the mild hybrid vehicle enters the other traveling mode. diesel;
motor;
An ignition switch for outputting status information of the ignition key;
An intake control valve for regulating intake air flowing into the diesel engine; And
A first learning condition for entering the driving mode in which the diesel engine is turned off in the starting-on state of the diesel engine and a second learning condition for entering the other-running mode in a predetermined reference speed or more, A controller for selectively learning the amount of opening of the intake control valve
And a learning unit for learning the learning result. 18. The method of claim 17,
The controller
The opening degree of the intake control valve is dampened in accordance with the closing amount of the cover of the intake control valve when the first learning condition is satisfied and the learning progress condition variable is set to '1' when the learning value is larger than a preset reference value And sets the learning progress condition variable to '0' when the learned value is smaller than the reference value, and learns the opening amount of the intake control valve when the learning progress condition variable is set to '1' Learning device. 18. The method of claim 17,
The controller
When the cumulative number of times of learning for the intake control valve during the driving cycle of the hybrid vehicle satisfies the second learning condition is less than a predetermined reference number, the intake control valve is opened / closed by a predetermined number of opening / closing times according to the running pattern of the hybrid vehicle And learning the opening amount of the intake control valve. 20. The method of claim 19,
The controller
Wherein the running pattern of the hybrid vehicle is divided into a middle speed running pattern and a middle speed running pattern and the number of times of opening and closing of the medium speed running pattern is set to be smaller than that of the middle and low speed running pattern. 18. The method of claim 17,
Wherein the intake control valve includes at least one of an exhaust gas recirculation valve, a swirl control valve, and an air control valve.

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