KR20030037637A - Cylinder deactivation controlling device of vehicle and method thereof - Google Patents

Abstract

The present invention relates to a cylinder part driving control apparatus and a method for compensating to minimize torque fluctuations generated when driving a cylinder part to maintain a more stable driving state of an engine. According to an aspect of the present invention, there is provided a driving control apparatus for a cylinder portion of a vehicle, the apparatus comprising: a motor configured to compensate for the increase or decrease of the output torque of the engine in accordance with a motor control signal input to the engine output shaft of the vehicle; An engine torque detector for detecting a torque value of an engine output according to an increase or decrease of the number of cylinders operated to output substantial engine torque in a driving state of the engine and outputting an electrical signal corresponding thereto; Outputs a partial operation control signal for the cylinder partial operation control operation of the engine, and compares the detected torque value and the set torque value to the corresponding increase / decrease control signal of the engine torque and the increase / decrease control signal of the engine torque. A control unit for outputting an increase / decrease control signal of the opposite motor torque; A throttle valve driving actuator which is driven according to an input of an increase / decrease control signal of the engine torque supplied from the control unit to open and close the throttle valve; And a fuel supply actuator for controlling a flow of fuel supplied to a corresponding cylinder according to an input of a partial operation control signal supplied from the controller.

Description

CYLINDER DEACTIVATION CONTROLLING DEVICE OF VEHICLE AND METHOD THEREOF}

TECHNICAL FIELD The present invention relates to a vehicle, and more particularly, to an apparatus and method for controlling a cylinder part of a vehicle.

Typically, four-stroke engines consist of multiple cylinders.

Thus, in a four-stroke engine, the engine's output is expressed as the sum of the output produced by the configuration cylinder.

On the other hand, the thermal efficiency in a four-stroke engine is generally maximum at medium speed heavy loads.

This is because the combustion efficiency in the individual cylinder of each engine is maximum at medium speed heavy load.

Therefore, when partial cylinder deactivation is performed in accordance with the required output of the gasoline engine, the efficiency of the engine can be increased not only in the heavy load but also in the low load region.

In the conventional four-stroke engine, the cylinder deactivation can be performed in some gasoline engines, but this is possible in very few operating conditions, and the prior art is completely dependent on the injection fuel amount and the ignition timing in the gasoline engine control system. There is a disadvantage that the degree of freedom of application falls.

In the conventional cylinder partial operation, when the vehicle enters a predetermined condition, the cylinder partial operation is entered by stopping fuel injection of some cylinders in accordance with the load condition of the vehicle.

In general, when the load fluctuation is very small in the constant speed driving state, the amount of torque required at the same engine speed (RPM) is very small in the constant speed driving, in which case the torque shock due to switching to the cylinder part operation is minimal, It also maintains the engine's operability.

At this time, the discontinuous point of the engine output occurs, causing the torque to fluctuate. Therefore, the shock that may cause discomfort to the driver may occur, thereby controlling the torque fluctuation in the transient state by adjusting the intake air amount and the ignition timing of the engine.

When the above method is used, the intake air amount and the ignition timing are used to minimize torque fluctuations in the transient state entering the cylinder part operation.

Therefore, these elements only operate the cylinder part only in the operating region where torque control is sufficient, and this region is extremely limited.

In addition, torque distribution of individual cylinders has been used in relatively even six-cylinder engines.

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus and method for controlling a cylinder portion of a vehicle capable of maintaining a more stable driving state of an engine by compensating to minimize torque fluctuations generated during cylinder portion operation.

In order to achieve the above object, the present invention provides a cylinder drive control apparatus for a vehicle, comprising: a motor for compensating the increase and decrease of an output torque of the engine according to a motor control signal mounted and input to an engine output shaft of the vehicle; An engine torque detector for detecting a torque value of an engine output according to an increase or decrease of the number of cylinders operated to output substantial engine torque in a driving state of the engine and outputting an electrical signal corresponding thereto; Outputs a partial operation control signal for the cylinder partial operation control operation of the engine, and compares the detected torque value and the set torque value to the corresponding increase / decrease control signal of the engine torque and the increase / decrease control signal of the engine torque. A control unit for outputting an increase / decrease control signal of the opposite motor torque; A throttle valve driving actuator which is driven according to an input of an increase / decrease control signal of the engine torque supplied from the control unit to open and close the throttle valve; And a fuel supply actuator for regulating the flow of fuel supplied to the corresponding cylinder according to the input of the partial operation control signal supplied from the controller.

In addition, in order to achieve the above object, the present invention provides a method for controlling the operation of a cylinder portion of a vehicle having a motor mounted on an engine output shaft to compensate for the increase or decrease of the output torque of the engine, wherein the actual engine torque is in a driving state of the engine. Detecting the number of cylinders operated to be output; Compensating for the reduced engine torque by increasing the torque of the motor when the number of cylinders is reduced in the cylinder number detecting step; Detecting an output torque of the engine; Comparing the detected torque value of the engine with a set torque value; And increasing the engine torque until the detected torque value of the engine becomes a set torque value, while reducing the torque value of the motor.

1 is a view showing the configuration of a cylinder part driving control apparatus of a hybrid vehicle according to an embodiment of the present invention.

2 to 5 are flowcharts illustrating a process of controlling a partial cylinder operation of a hybrid vehicle according to the increase / decrease of the number of cylinder operations and the increase / decrease of the output torque of the motor according to an embodiment of the present invention.

6 to 9 are diagrams showing changes in torque output of an engine and a motor of a hybrid vehicle according to the increase and decrease of the number of cylinder operation and the increase and decrease of the output torque of the motor according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. While many specific details, such as the following description and the annexed drawings, are shown to provide a more general understanding of the invention, these specific details are illustrated for the purpose of explanation of the invention and are not meant to limit the invention thereto. And a detailed description of known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

Referring to Figure 1 will be described the configuration of the cylinder part driving control apparatus of a hybrid vehicle according to an embodiment of the present invention.

Embodiments of the present invention are suitable for a vehicle having a configuration such as a parallel hybrid vehicle.

The parallel hybrid vehicle has a power train composed of a motor 110 and other drive trains capable of transmitting power directly to the output shaft of the engine 100.

For reference, a drive train refers to a transmission, transmission gears and even transmissions to wheels, and a power train refers to power generation and power transmission.

The motor 110 may directly add torque to the output shaft of the engine 100, and conversely, may reduce torque.

Embodiment of the present invention is a cylinder partial operation control apparatus of a parallel hybrid vehicle, the motor 110, the engine torque detection unit 120, the control unit 130, the throttle valve drive actuator 140, the fuel supply actuator (injector) It comprises 150.

Of course, the combination of the engine 100 and the motor 110 of the parallel hybrid vehicle may be directly connected to the output shaft of the engine 100 or mediated by a separate power transmission device so that the output shaft angular velocity of the engine 100 and the motor ( The angular velocity of 110 may be separated.

In any case, the embodiment of the present invention may be any structure that allows the motor 110 to add or subtract torque to the output shaft of the engine 100.

An embodiment of the present invention is that the motor 110 can freely add or decrease the output shaft torque of the engine 100.

Therefore, when the cylinder part is operated, the discontinuity of the torque can be compensated by the motor 110.

The motor 110 functions to compensate for the increase or decrease of the output torque of the engine 100 according to a motor control signal input to the engine 100 output shaft of the vehicle.

The engine torque detector 120 detects a torque value of the engine 100 output according to the increase or decrease of the number of cylinders operated to output substantial engine torque in the driving state of the engine 100, and outputs an electrical signal corresponding thereto. .

The controller 130 performs the control operation of the overall engine 100 and the motor 110, and in particular, in the embodiment of the present invention outputs a partial operation control signal for the cylinder partial operation control operation of the engine 100, By comparing the detected torque value of the engine 100 with the set torque value, the increase / decrease control signal of the corresponding engine torque and the increase / decrease control signal of the motor torque opposite to the increase / decrease control signal of the engine torque are output.

The controller 130 supplies an increase control signal of the motor torque to the motor 110 to compensate for the reduction of the engine torque when the number of cylinders to be operated is reduced, and when the detected torque value of the engine 100 becomes the set torque value, The engine torque increase control signal is supplied and, on the contrary, the motor torque decrease control signal is supplied to perform the control operation to minimize the torque change generated when the number of operating cylinders is reduced.

On the other hand, the controller 130 supplies a control signal for reducing the motor torque to the motor 110 to compensate for the increase in the engine torque when the number of cylinders operated increases, and the detected torque value of the engine 100 is set to the set torque value. The engine torque reduction control signal is supplied until the engine torque reduction control signal is supplied, and the motor torque increase control signal is supplied to the motor torque increasing control signal, thereby minimizing the torque change generated when the number of operating cylinders is increased.

The throttle valve driving actuator 140 is driven in response to the input of the increase / decrease control signal of the engine torque supplied from the controller 130 to open and close the throttle valve.

The fuel supply actuator 150 functions to interrupt the flow of the fuel supplied to the corresponding cylinder according to the input of the partial operation control signal supplied from the controller 130.

1 to 9, a process of controlling a partial cylinder operation of a hybrid vehicle according to the increase / decrease of the number of cylinder operations and the increase / decrease of the output torque of the motor 110 will be described.

For reference, FIGS. 6 to 9 illustrate changes in torque output of the engine 100 and the motor 110 of the hybrid vehicle according to the increase / decrease of the number of cylinder operations and the increase / decrease of the output torque of the motor 110 according to the embodiment of the present invention. One drawing.

In order to operate the cylinder part of the engine 100 according to the exemplary embodiment of the present invention, two processes are required.

First, reduce the number of working cylinders.

For example, the number of cylinders is reduced so that four cylinder operations are three cylinder operations.

The second is to increase the number of working cylinders.

For example, the number of cylinders is increased so that three cylinder operations are four cylinder operations.

Here, the increase / decrease control operation of the number of operation cylinders is performed by controlling the flow of the fuel supplied to the corresponding cylinder according to the input of the partial operation control signal supplied from the controller 130 to the fuel supply actuator 150.

On the other hand, in the above two processes are divided into two again according to whether to add or subtract the output shaft torque using the motor (110).

In addition, by using the motor 110, it is possible to effectively reduce the vibration of the engine 100 generated due to the imbalance of the torque distribution generated per one stroke during the cylinder portion operation.

For example, assuming operation with two cylinders, the torque generation frequency is reduced from two combustions to four combustions per stroke, resulting in an imbalance in rotation at low engine speed (RPM).

At this time, if the torque is appropriately added or decreased by using the motor 110, it is possible to effectively suppress the vibration caused by the imbalance of the rotation.

First, referring to FIGS. 2 and 6, a process of controlling a cylinder part when the motor 110 adds torque will be described.

This is the case when driving with four cylinders and then three cylinders.

For example, when switching from four cylinder operation to three cylinder operation, the motor 110 adds torque.

First, the controller 130 analyzes a signal input through the throttle position sensor 160 in S210 of FIG. 2 to detect whether the opening degree of the throttle valve is maintained.

If the opening degree of the throttle valve is maintained in S210, the controller 130 proceeds to S212 and detects the number of cylinders operated to output substantial engine torque in the driving state of the engine 100.

The controller 130 proceeds to S214 when the operating state (switching from four cylinder operating states to three cylinder operating states) in which the number of cylinders is reduced in S212.

The controller 130 supplies a motor torque increase control signal to the motor 110 at step S214.

At this time, the motor 110 is driven in accordance with the input of the motor torque increase control signal input from the controller 130 to increase the torque of the motor 110, to compensate for the reduced engine torque.

The controller 130 proceeds to step S216 to drive the throttle valve driving actuator 140 to open the throttle valve.

Subsequently, the controller 130 proceeds to step S218 and analyzes a signal input through the engine torque detector 120 to detect an output torque of the engine 100.

When the output torque of the engine 100 is detected in S218, the controller 130 proceeds to S220 and supplies a motor torque reduction control signal to the motor 110.

At this time, the motor 110 is driven according to the input of the motor torque reduction control signal input from the controller 130 to reduce the torque of the motor 110.

Subsequently, the controller 130 proceeds to S222 and compares the detected torque value of the engine 100 with the set torque value.

The controller 130 repeatedly increases the engine torque by repeatedly performing the above-described S216 to S220 until the torque value of the engine 100 detected in the above-described S222 becomes a set torque value, and conversely, A control operation for reducing the torque value is performed.

As described above, when one cylinder of the engine 100 is not operated when switching from four cylinder operation to three cylinder operation, the output shaft of the engine 100 causes the output torque of 3/4 of the set torque to be instantaneously output. do.

At this time, the 1/4 value of the set torque which is a reduced portion of the torque is instantly compensated using the motor 110.

After that, the throttle valve is opened to increase the torque value of the engine 100 until it reaches a set torque value, while the torque value of the motor 110 is decreased, thereby minimizing the change in torque when the number of operating cylinders changes.

Referring to Figures 3 and 7 will be described in the cylinder portion operation control process when the motor 110 reduces the torque.

This is the case when driving with four cylinders and then three cylinders.

For example, when switching from four cylinder operation to three cylinder operation, the motor 110 reduces the torque.

In operation S310 of FIG. 3, when the number of cylinders is not increased or decreased, that is, four cylinders, the controller 130 proceeds to S312 and generates the remaining cylinders (three cylinders) except for the cylinder to be reduced. The engine torque increase control signal is supplied to the throttle valve drive actuator 140 so that the sum of the torques becomes a set torque value.

At this time, the throttle valve driving actuator 140 is driven in response to the input of the engine torque increase control signal supplied from the controller 130 to increase the engine torque by opening the throttle valve.

The controller 130 proceeds to step S314 and supplies a motor torque reduction control signal to the motor 110 by the increase amount of the engine torque.

At this time, the motor 110 is driven according to the input of the motor torque reduction control signal input from the controller 130 to reduce the torque of the motor 110.

The controller 130 proceeds to S316 and compares the sum of the torque generated from the remaining cylinders with the set torque value.

Subsequently, when the sum of the torques generated from the remaining cylinders in step S316 is equal to the set torque value, the controller 130 proceeds to step S318 and performs a control operation of stopping the operation state of the excluded cylinder.

As described above, when switching from four cylinder operation to three cylinder operation, first open the throttle valve during operation with four cylinders until the sum of the torques generated during the operation of three cylinders becomes the value of the set torque. To increase.

At the same time, the increase in engine torque is reduced by using the motor 110 so that the final output shaft torque is maintained at the set torque value.

When the sum of the torques of the three cylinders coincides with the value of the set torque, the number of operating cylinders is released by releasing the torque reduction amount that the motor 110 is in charge of while deactivating any one of the four cylinders of the engine 100. The change in torque at the time of change is minimized.

Referring to Figures 4 and 8 will be described the cylinder part operation control process when the motor 110 adds torque when the number of operating cylinders increases.

This is the case when driving with three cylinders and then four cylinders.

For example, when switching from three cylinder operation to four cylinder operation, the motor 110 increases the torque.

In operation S410 of FIG. 4, when the number of cylinders is reduced, that is, when three cylinders are operated, the controller 130 proceeds to operation S412 and sums the torques generated from the entire cylinders including the cylinders that are not operated. The engine torque reduction control signal is supplied to the throttle valve drive actuator 140 so as to have this set torque value.

At this time, the throttle valve driving actuator 140 is driven according to the input of the engine torque reduction control signal supplied from the controller 130 to close the throttle valve to reduce the engine torque.

The controller 130 proceeds to step S414 and supplies a motor torque increase control signal to the motor 110 by the amount of engine torque decrease.

At this time, the motor 110 is driven according to the input of the motor torque increase control signal input from the controller 130 to increase the torque of the motor 110.

The controller 130 proceeds to S416 and compares the sum of the torque generated from the entire cylinders (four cylinders) including the non-operated cylinders with the set torque value.

Subsequently, when the sum of the torques generated from the four cylinders in step S416 is equal to the set torque value, the controller 130 proceeds to step S418 and performs a control operation to operate the remaining one cylinder that is not driven. .

As described above, when switching from three cylinder operation to four cylinder operation, first, the throttle valve is closed during operation with three cylinders to reduce the engine torque until the sum of the torques of the four cylinders becomes the value of the set torque.

At the same time, the torque is increased by the amount of the engine torque by using the motor 110 so that the final output shaft torque is maintained at the set torque value.

If the sum of the torques of the four cylinders coincides with the set torque value, the number of operating cylinders is changed by releasing the amount of torque increase that the motor 110 is responsible for while operating one cylinder not operated among the four cylinders of the engine 100. Minimize the change in torque at time.

5 and 9, a process of controlling a partial cylinder operation when the motor 110 decreases torque when the number of operating cylinders is increased will be described.

This is the case when driving with three cylinders and then four cylinders.

For example, when switching from three cylinder operation to four cylinder operation, the motor 110 reduces the torque.

First, the controller 130 analyzes a signal input through the throttle position sensor 160 in S510 of FIG. 5 to detect whether the opening degree of the throttle valve is maintained.

If the opening degree of the throttle valve is maintained in S510, the controller 130 proceeds to S512 and detects the number of cylinders operated to output substantial engine torque in the driving state of the engine 100.

The control unit 130 proceeds to S514 if the driving state in which the number of cylinders is increased (switching from three cylinder operating states to four cylinder operating states) in S512.

The controller 130 supplies a motor torque reduction control signal to the motor 110 in step S514.

At this time, the motor 110 is driven according to the input of the motor torque reduction control signal input from the controller 130 to reduce the torque of the motor 110, to compensate for the increased engine torque.

The controller 130 proceeds to step S516 to drive the throttle valve driving actuator 140 to close the throttle valve.

Subsequently, the controller 130 proceeds to step S518 and analyzes a signal input through the engine torque detector 120 to detect an output torque of the engine 100.

If the output torque of the engine 100 is detected in S518, the controller 130 proceeds to S520 and supplies a motor torque increase control signal to the motor 110.

At this time, the motor 110 is driven according to the input of the motor torque increase control signal input from the controller 130 to increase the torque of the motor 110.

Subsequently, the controller 130 proceeds to S522 and compares the detected torque value of the engine 100 with the set torque value.

The controller 130 repeatedly performs the aforementioned operations S516 to S520 until the torque value of the engine 100 detected in operation S522 is a set torque value, and decreases the engine torque. The control operation to increase the torque value is performed.

As described above, when switching from three cylinder operation to four cylinder operation, first, if one cylinder not operated among four cylinders of the engine 100 is operated while the opening degree of the throttle valve is maintained, The output shaft instantaneously outputs torque equal to 4/3 of the set torque.

At this time, the 1/3 value of the set torque which is an increase of the torque is instantaneously reduced by using the motor 110.

After that, the torque value of the motor 110 is increased while closing the throttle valve until the torque value of the engine 100 reaches the set torque value, thereby minimizing the change in torque when the number of operating cylinders changes.

As described above, the apparatus and method for controlling the operation of the cylinder portion of the vehicle according to the present invention can suppress the vibration caused by the imbalance of the engine rotation generated during the cylinder portion operation and compensate to minimize the torque fluctuation generated during the cylinder portion operation. There is an effect that can maintain a more stable operating state of the engine.

Claims (7)

In a cylinder part driving control apparatus of a vehicle, A motor configured to compensate for the increase or decrease of the output torque of the engine according to a motor control signal input to the engine output shaft of the vehicle; An engine torque detector for detecting a torque value of an engine output according to an increase or decrease of the number of cylinders operated to output substantial engine torque in a driving state of the engine and outputting an electrical signal corresponding thereto; Outputs a partial operation control signal for the cylinder partial operation control operation of the engine, and compares the detected torque value and the set torque value to the corresponding increase / decrease control signal of the engine torque and the increase / decrease control signal of the engine torque. A control unit for outputting an increase / decrease control signal of the opposite motor torque; A throttle valve driving actuator which is driven according to an input of an increase / decrease control signal of the engine torque supplied from the control unit to open and close the throttle valve; And a fuel supply actuator for regulating a flow of fuel supplied to a corresponding cylinder in response to an input of a partial operation control signal supplied from the control unit. The method of claim 1, wherein the control unit supplies an increase control signal of the motor torque to the motor to compensate for the reduction of the engine torque when the number of cylinders operated is reduced, The engine torque increase control signal is supplied until the detected torque value of the engine becomes the set torque value, and on the contrary, the motor torque decrease control signal is supplied to perform a control operation to minimize the torque change generated when the number of operating cylinders is reduced. The cylinder portion driving control device of the vehicle, characterized in that. The method of claim 1, wherein the control unit supplies a reduction control signal of the motor torque to the motor to compensate for the increase in the engine torque when the number of cylinders operated increases, The engine torque reduction control signal is supplied until the detected torque value of the engine becomes the set torque value, and on the contrary, the motor torque increase control signal is supplied to perform a control operation to minimize the torque change generated when the number of operating cylinders increases. The cylinder portion driving control device of the vehicle, characterized in that. In the cylinder portion driving control method of a vehicle having a motor mounted on an engine output shaft to compensate for the increase or decrease of the output torque of the engine, Detecting the number of cylinders operated to output substantial engine torque in a drive state of the engine; Compensating for the reduced engine torque by increasing the torque of the motor when the number of cylinders is reduced in the cylinder number detecting step; Detecting an output torque of the engine; Comparing the detected torque value of the engine with a set torque value; And decreasing the torque value of the motor while increasing the engine torque until the detected torque value of the engine becomes a set torque value. 5. The method of claim 4, further comprising: increasing the engine torque so that the sum of the torques generated from the remaining cylinders, except for the cylinders to be reduced, becomes a set torque value when the number of cylinders in the cylinder number detection step is not increased or decreased; Decreasing the torque value of the motor by an increase amount of the engine torque; Comparing a sum of torque generated from the remaining cylinders with a set torque value; And stopping the driving state of the excluded cylinder when the sum of the torques generated from the remaining cylinders in the comparing step coincides with the set torque value. 5. The method of claim 4, further comprising the steps of: reducing the engine torque so that the sum of the torques generated from the entire cylinders, including the non-operated cylinders, becomes a set torque value if the number of cylinders in the cylinder number detection step is reduced; Increasing the torque value of the motor by the amount of reduction in the engine torque; Comparing a set torque value with a sum of torques generated from all cylinders including the non-operating cylinder; And operating the cylinder that is not driven when the sum of the torques generated from the entire cylinder including the cylinder that is not driven matches a set torque value. The method of claim 4, further comprising: reducing the motor torque to compensate for the increased engine torque when the cylinder number is detected in the cylinder number detecting step; Detecting an output torque of the engine; Comparing the detected torque value of the engine with a set torque value; And increasing the torque value of the motor while reducing the engine torque until the detected torque value of the engine becomes a set torque value.