KR20160051961A - Apparatus and method for controlling ignition of vehicle - Google Patents

Abstract

The present invention relates to a start-up control device of a vehicle, and a start-up control method of a vehicle. According to the present invention, the start-up control device comprises: an engine state checking unit checking an engine state when an engine is started or stopped; a leakage amount determination unit determining an amount of air leakage while the engine is stopped using a difference in angular acceleration of a crank shaft before the engine is stopped and when the engine is started; and a control unit controlling start-up of the engine by determining a start-up mode of the engine in accordance with a result of comparison by comparing the amount of air leakage while the engine is stopped with a predefined reference value. The control unit controls EV output enable power in accordance with the determined start-up mode. The present invention varies the start-up mode to enable the engine to be started by a motor when the engine is impossible to be started.

Description

[0001] Apparatus and method for controlling ignition of vehicle [

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to an apparatus and method for starting a vehicle, and more particularly, to a technique for variably controlling a start mode according to an air leakage amount.

The HEV judges that the mode is switched from EV to HEV (engine start) according to the driver's requested power.

If the power that can be output from the motor is 20kW, it can not travel up to 20kW in EV, but it can travel in EV by subtracting a certain amount in order to start the engine. (If the power required for starting is 2kW, it can drive EV up to 20 - 2 = 18kW)

A technique in which the engine itself serves as a starter is known (Publication No. 2002-0005589)

The above self-starting technology stops the engine with compressed air and fuel, and starts the engine by activating the spark plug (ignition) when starting is required.

However, the HEV can run for a long time in the EV, and if the compressed air is leaked for the start, the explosive power required for starting can not be obtained.

Korean Patent Publication No. 2002-0005589

SUMMARY OF THE INVENTION It is an object of the present invention to provide an apparatus and method for controlling start-up of a vehicle, which can determine whether the engine can start in accordance with the compressed air state of the engine and use the power capable of running the EV when the engine is started.

It is another object of the present invention to provide a start control device for a vehicle which can determine whether the engine can be started in accordance with the compressed air state of the engine and change the start mode when the engine itself can not be started, And a method.

In order to achieve the above object, a vehicle start control apparatus according to the present invention includes an engine state confirmation unit for confirming an engine state at the time of starting and stopping an engine, an angular acceleration detecting unit for detecting an angular acceleration of the crankshaft at the start of the engine, A leakage amount determination unit for determining an amount of air leakage during a stoppage time of the engine by using a difference between the amount of air leaking during a stoppage time of the engine and a predetermined reference value, And a control unit for controlling start-up of the engine.

In this case, the controller adjusts the EV output power according to the determined startup mode.

The leakage amount determining unit estimates the combustion explosion force corresponding to the angular acceleration reduced at the time of starting the engine by using the angular acceleration of the crankshaft at the time of starting the engine and calculates the air leakage amount from the estimated combustion explosion force.

The starting control device of the vehicle further includes a leakage amount learning unit that learns an air leakage amount corresponding to a stop time of the engine from the air leakage amount calculated by the leakage amount determination unit.

The leakage amount determination unit determines an amount of air leakage corresponding to a stop time of the engine based on the learned amount of air leakage amount according to the stop time of the engine.

The control unit may determine that the engine is in an engine starting mode if the amount of air leaking does not exceed the predefined reference value, and controls the engine to start the engine itself.

The control unit may determine that the startup mode is a motor startup mode when the air leakage amount exceeds the predefined reference value and start the engine by the motor.

The controller may be configured to maintain the EV output enable power at a first value when the engine start mode is set to the engine start mode and to lower the EV output enable power to a second value when the engine start mode is selected .

According to another aspect of the present invention, there is provided a method of controlling a starting of a vehicle, the method comprising: confirming an engine state at the time of starting and stopping the engine; comparing the angular acceleration difference of the crankshaft Determining an air leakage amount of the engine during a stoppage time, comparing an air leakage amount during a stoppage time of the engine with a predetermined reference value, and determining a startup mode of the engine based on the comparison result, Adjusting the EV outputable power according to the startup mode, and controlling start-up of the engine in accordance with the determined startup mode.

According to the present invention, it is possible to grasp whether the engine can be started in accordance with the compressed air state of the engine, and to maximize the use of the EV driveable power at the time of starting the engine itself.

According to the present invention, when the engine can not be started automatically according to the compressed air state of the engine, the starting mode is changed and the engine is started by the motor, thereby improving the starting performance.

1 is a block diagram showing the configuration of a vehicle start control apparatus according to the present invention.
2 is an exemplary diagram for explaining an air leakage amount determining operation of the vehicle start control apparatus according to the present invention.
3 is an exemplary diagram referred to explain the starting mode variable operation of the vehicle start control apparatus according to the present invention.
4 is a flowchart showing an operational flow for a method of controlling a starting of a vehicle according to the present invention.

It is noted that the technical terms used in the present invention are used only to describe specific embodiments and are not intended to limit the present invention. In addition, the technical terms used in the present invention should be construed in a sense generally understood by a person having ordinary skill in the art to which the present invention belongs, unless otherwise defined in the present invention, and an overly comprehensive It should not be construed as meaning or overly reduced. In addition, when a technical term used in the present invention is an erroneous technical term that does not accurately express the concept of the present invention, it should be understood that technical terms that can be understood by a person skilled in the art can be properly understood. In addition, the general terms used in the present invention should be interpreted according to a predefined or context, and should not be construed as being excessively reduced.

Furthermore, the singular expressions used in the present invention include plural expressions unless the context clearly dictates otherwise. The term "comprising" or "comprising" or the like in the present invention should not be construed as necessarily including the various elements or steps described in the invention, Or may include additional components or steps.

Furthermore, terms including ordinals such as first, second, etc. used in the present invention can be used to describe elements, but the elements should not be limited by terms. Terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like or similar elements throughout the several views, and redundant description thereof will be omitted.

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. It is to be noted that the accompanying drawings are only for the purpose of facilitating understanding of the present invention and should not be construed as limiting the scope of the present invention.

1 is a block diagram showing the configuration of a vehicle start control apparatus according to the present invention.

The vehicle start control apparatus 100 according to the present invention can be implemented inside the vehicle. At this time, the vehicle start control device 100 may be integrally formed with the internal control units of the vehicle, or may be implemented as a separate device and may be connected to the control units of the vehicle by separate connecting means. Here, the vehicle start control apparatus 100 may operate in conjunction with the engine and the motor of the vehicle, and may operate in conjunction with a control unit that controls the operation of the engine or the motor.

1, the vehicle start control apparatus 100 includes a control unit, an input unit 120, an output unit 130, a communication unit 140, a storage unit 150, an engine condition check unit 160, A determination unit 170, and a leakage amount learning unit 180. Here, the control unit 110 may process the signals transmitted between the respective units of the start-up control apparatus 100 of the vehicle.

The input unit 120 is a means for receiving a control command from a user and may be a key button provided on the outside of the vehicle start control apparatus 100 or on an instrument panel of the vehicle, A soft key implemented on the control device 100 or a display provided in the vehicle may be applicable. The input unit 120 may be an input unit such as a mouse, a joystick, a jog shuttle, or a stylus pen.

The output unit 130 may include a display for displaying an operation state of the vehicle start control apparatus 100, an operation result, and the like. As one example, the display may display the engine state information of the vehicle, the startup mode information, the air leakage amount information, and the like.

Here, the display may be used as an input device in addition to an output device when a sensor for sensing a touch operation is provided. That is, when a touch sensor such as a touch film, a touch sheet, or a touch pad is provided on the display, the display operates as a touch screen, and the input unit 120 and the output unit 130 may be integrated.

The display may be a liquid crystal display (LCD), a thin film transistor liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), a flexible display, , A field emission display (FED), and a 3D display (3D display).

In addition, the display may be an apparatus separately implemented in the vehicle start control apparatus 100, but may be an apparatus connected to the vehicle start control apparatus 100 provided in the vehicle.

The communication unit 140 may include a communication module that supports communication interfaces with electrical components and / or control units provided in the vehicle. For example, the communication module may be communicatively connected to an instrument panel, a display, or the like provided in the vehicle, and may transmit the operation state of the startup control device 100 to the display. The communication module may be connected to an engine, a motor, or the like to receive status information of the engine, and may transmit a start control signal according to each startup mode.

The communication unit 140 may include a communication module that supports vehicle network communication such as CAN (Controller Area Network) communication, LIN (Local Interconnect Network) communication, and Flex-Ray communication.

In addition, the communication unit 140 may include a module for wireless Internet access or a module for short range communication. Here, the wireless Internet technology includes a wireless LAN (WLAN), a wireless broadband (Wibro), a Wi-Fi, a World Interoperability for Microwave Access (Wimax), a High Speed Downlink Packet Access ), Etc., and the short range communication technology may include Bluetooth, ZigBee, UWB (Ultra Wideband), RFID (Radio Frequency Identification), Infrared Data Association (IrDA) have. The wired communication technology may include USB (Universal Serial Bus) communication and the like.

The storage unit 150 may store a set value for operation of the vehicle start control apparatus 100. [ As an example, the storage unit 150 may store a predefined reference value for determining a startup mode, and may store operating conditions of each startup mode, for example, an engine startup mode and / Can be stored. In addition, the storage unit 150 may store a command for controlling the EV travelable power according to the variable control of the start mode. Also, the storage unit 150 may store an algorithm for determining and learning the amount of air leakage, and / or an algorithm for variably controlling the startup mode according to the air leakage amount.

Here, the storage unit 150 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory A random access memory (SRAM), a read-only memory (ROM), a programmable read-only memory (PROM), an electrically erasable programmable read-only memory (EEPROM) Erasable Programmable Read-Only Memory).

The engine condition check unit 160 confirms the engine condition at the time of starting and stopping the engine.

As an example, the engine condition check unit 160 checks the start time of the engine, the start time, and the like. At this time, the engine condition check unit 160 can check the stop time of the engine. Further, the engine condition check unit 160 can check the angular acceleration of the crankshaft of the engine, for example, the angular acceleration in the pre-stop state of the engine and the angular acceleration after starting the engine.

The leakage amount determination unit 170 determines the amount of air leakage during the stop time of the engine by using the angular acceleration difference between the crankshaft and the engine before the engine is stopped. At this time, the leakage amount determination unit 170 estimates the combustion explosion force corresponding to the angular acceleration reduced at the time of starting the engine by using the angular acceleration of the crankshaft at the time of starting the engine, and calculates the air leakage amount from the estimated combustion explosion force.

Here, the leakage amount of the compressed air can be calculated by the acceleration amount of the engine according to the explosion of the initial start. If the atmospheric pressure, temperature, throttle valve opening angle, etc. are known in the air intake step before stopping the engine, the amount of air sucked into the cylinder can be known. Accordingly, when the fuel is injected by the air-fuel ratio corresponding to the amount of air to be inhaled and the fuel is exploded, the explosion force according to the amount of intake air can be obtained. At this time, since the magnitude of the explosive force and the angular acceleration of the crankshaft have a predetermined relationship (when the explosive force is large, the angular acceleration of the crankshaft becomes large.) Measurement of the angular acceleration can invert the explosive force.

 Therefore, when the air leaks, the explosive force corresponding to the reduced angular acceleration can be inversely calculated by using the point where the angular acceleration of the crankshaft is reduced, and the air quantity for that can be determined. At this time, the air leakage amount can be calculated by comparing the calculated amount of air with the amount of air that was first sucked.

The leakage amount learning unit 180 learns the air leakage amount according to the engine stop time from the air leakage amount calculated by the leakage amount determination unit 170 and stores the learning result in the storage unit 150. [ Here, the amount of air leakage that is different from the stop time of the vehicle learned by the leakage amount learning unit 180 can be used later to determine the amount of air leakage during the engine stop time in the leakage amount determination unit 170. [

In other words, when there is a request to start the engine, the leakage amount determination unit 170 acquires the air leakage amount information according to the stop time of the engine that has been learned in advance from the storage unit 150, The amount of air leakage corresponding to the stop time of the engine among the leakage amount information can be confirmed.

If the air leakage amount information corresponding to the engine stop time is not learned, the leakage amount determination unit 170 predicts the air leakage amount corresponding to the engine stop time from the air leakage amount information according to the learned stop time of the engine .

The control unit 110 compares the air leakage amount during the engine stop time with a predetermined reference value, and determines the engine start mode according to the comparison result.

At this time, if the air leakage amount does not exceed the predefined reference value, the controller 110 determines the startup mode as the engine startup mode. Here, the engine startup mode refers to a mode in which the engine itself starts up.

On the other hand, when the air leakage amount exceeds the predefined reference value, the control unit 110 determines the startup mode as the motor startup mode. Here, the motor startup mode refers to a mode in which the engine can not be started and the engine is started using the motor. Large air leakage reduces explosive power. If the reduced explosive power is not sufficient to rotate the engine, the engine can not be started. Therefore, if the air leakage exceeds the reference value, the engine can not be started. Therefore, the engine must be started.

Here, the controller 110 may adjust the EV output power according to the startup mode. As an example, if the startup mode is determined to be the engine startup mode, the controller 110 may cause the EV output enable power to be maintained at the first value. That is, if the amount of air leakage is small and the engine can be started by itself, the vehicle can travel up to the driver's required power of 20 kW in the EV, so that the EV travelable range is increased. In this case, it is possible to drive the EV up to 20 kW, which makes it possible to improve the fuel efficiency and reduce the number of PE parts.

As another example, if the startup mode is determined to be the motor startup mode, the control unit 110 may adjust the EV output enable power to a second value. That is, if the maximum output power of the motor is 20 kW, and the power required for starting the engine is 2 kW, then it is set to run from 20 kW to 18 kW minus 2 kW. That is, when the driver's requested power exceeds 18 kW, the engine is started using the motor.

The controller 110 determines a startup mode, and when the EV output power adjustment is completed, outputs a signal for controlling the starting of the engine under the set conditions. When the startup mode is determined to be the engine startup mode, the controller 110 outputs the first control signal to the control unit that controls the engine or the engine. Meanwhile, when the startup mode is determined to be the motor startup mode, the controller 110 outputs a second control signal to the control unit that controls the motor or motor.

Therefore, in the engine starting mode, the engine starts the starting based on the first control signal, and in the motor starting mode, the motor starts the starting based on the second control signal.

The controller 110 according to the present embodiment may correspond to at least one processor or may include at least one processor. Accordingly, the control unit 110 can be operated in a form included in another hardware device such as a microprocessor or a general-purpose computer system.

2 is an exemplary diagram for explaining an air leakage amount determining operation of the vehicle start control apparatus according to the present invention.

FIG. 2 shows a learning table in which the amount of air leakage according to the stop time of the engine is learned. In FIG. 2, reference numeral 210 designates the engine stop time (minute), and reference numeral 230 designates the air leakage amount cc corresponding to the engine stop time.

As shown in FIG. 2, when the engine is stopped for 10 minutes, 100 cc of compressed air leaks, and 340 cc of compressed air leaks when the engine is stopped for 30 minutes. In addition, it is confirmed that 510cc compressed air leaks when the engine is stopped for 45 minutes.

As described above, the vehicle start control device can learn the air leakage amount information calculated at the start request of the engine on the basis of the stop time of the vehicle to form a table. In this case, the start-up control device of the vehicle can check the stop time of the engine on the subsequent learning table to quickly and easily determine the corresponding air leakage amount without performing another calculation and / or inverse calculation procedure to determine the air leakage amount .

For example, when the time from the stopping time of the engine to the start requesting time is 30 minutes, the starting control device of the vehicle starts the stopping time of the vehicle from the reference numeral 250 of the learning table shown in Fig. 2, Minute, it is determined that the air leakage amount is 340 cc, and the startup mode can be determined based on this.

On the other hand, when the stopping time of the vehicle is five minutes, the air leakage amount corresponding to five minutes can not be confirmed in the learning table shown in Fig. In this case, the vehicle start control apparatus can predict the information of '5 minutes-50cc' from the information of '10 minutes -100cc' of the learning table and determine the startup mode corresponding thereto.

Although not shown in FIG. 2, the air leakage amount corresponding to the stop time of each engine may be averaged to predict the air leakage amount corresponding to five minutes.

3 is an exemplary diagram referred to explain the starting mode variable operation of the vehicle start control apparatus according to the present invention.

In FIG. 3, reference numeral 310 denotes an operation condition of the motor start mode, and reference numeral 330 denotes an operation condition of the engine start mode.

 First, as for the motor starting mode, when the air leakage amount exceeds the reference value, the starting control device of the vehicle determines the starting mode to be the motor starting mode for performing the engine starting by the motor. In this case, the starting control device of the vehicle adjusts the EV output power to a second value, for example, 18 kW, and when the driver's requested power exceeds 18 kW, the engine is started using the motor.

If the air leakage amount is less than the reference value, as shown in reference numeral 330, the starting control device of the vehicle determines the startup mode to be the engine startup mode in which the engine performs its own startup. In this case, the starting control device of the vehicle adjusts the EV outputable power to a first value, for example, 20 kW, so that the vehicle can travel to 20 KW of the vehicle.

The operation flow of the vehicle start control apparatus according to the present invention will be described in more detail as follows.

4 is a flowchart showing an operational flow for a method of controlling a starting of a vehicle according to the present invention.

As shown in FIG. 4, the start control apparatus of the vehicle enters the stop state of the engine (S110). When a start request is generated thereafter (S120), from the start time of the step S110 to the start time of the step S120 The engine stop time can be confirmed through the time of the engine.

If the air leakage amount exceeds the reference value (S140) as a result of the determination in step S130, the startup control device of the vehicle determines whether or not the startup mode of the vehicle is the startup mode Is switched to the motor starting mode (S150), and the EV output enable power is decreased to the second value (S160). Of course, the 'S160' process can be omitted if the EV output power is already set to the first value.

Thereafter, the start-up control device of the vehicle starts the engine using the motor (S170).

On the other hand, if it is determined in step S130 that the air leakage amount does not exceed the reference value (S140), the vehicle start control device switches the startup mode to the engine startup mode (S180) (S185). Of course, the 'S185' procedure can be omitted if the EV output power is already set to the first value.

Thereafter, the start-up control device of the vehicle starts the engine itself (S190).

Here, the vehicle start control device learns and stores the air leakage amount information according to the stop time of the engine in the step 'S130' (S200), and can be used when the 'S130' step is executed again.

The above processes may be implemented directly in hardware, software modules executed by a processor, or a combination of the two. The software modules may reside in storage media, such as memory and / or storage, such as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disks, removable disks, CD-ROMs. An exemplary storage medium is coupled to the processor, which is capable of reading information from, and writing information to, the storage medium. Alternatively, the storage medium may be integral with the processor. The processor and the storage medium may reside within an application specific integrated circuit (ASIC). The ASIC may reside within the user terminal. Alternatively, the processor and the storage medium may reside as discrete components in a user terminal.

As described above, the present invention has been described with reference to particular embodiments, such as specific elements, and specific embodiments and drawings. However, it should be understood that the present invention is not limited to the above- Those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the essential characteristics of the invention. Therefore, the spirit of the present invention should not be construed as being limited to the embodiments described, and all technical ideas which are equivalent to or equivalent to the claims of the present invention are included in the scope of the present invention .

100: Start control device 110:
120: input unit 130: output unit
140: communication unit 150:
160: engine condition checking unit 170: leak amount judging unit
180: Leakage amount learning unit

Claims (13)

An engine state confirmation unit for confirming an engine state at the start and stop of the engine;
A leakage amount determination unit for determining an amount of air leakage during a stoppage time of the engine by using an angular acceleration difference between the crankshaft and the crankshaft before the engine is stopped and when the engine is started; And
And a controller for comparing the amount of air leaking during the engine stop time with a predetermined reference value and for determining a starting mode of the engine based on a comparison result and controlling the starting of the engine,
Wherein the control unit adjusts the EV outputable power according to the determined startup mode. The method according to claim 1,
The leakage amount determination unit may determine,
Estimating a combustion explosion force corresponding to the angular acceleration reduced at the time of starting the engine by using the angular acceleration of the crankshaft at the time of starting the engine and calculating the air leakage amount from the estimated combustion explosion force. The method of claim 2,
The starting control device of the vehicle includes:
Further comprising a leakage amount learning unit for learning an air leakage amount corresponding to a stop time of the engine from the air leakage amount calculated by the leakage amount determination unit. The method of claim 3,
The leakage amount determination unit may determine,
And determines an air leakage amount corresponding to a stop time of the engine based on the learned air leakage amount information according to the stopping time of the engine. The method according to claim 1,
Wherein,
And determines that the engine is in an engine starting mode if the air leakage amount does not exceed the predefined reference value, so as to start the engine itself. The method according to claim 1,
Wherein,
Wherein when the air leakage amount exceeds the predetermined reference value, the start mode is determined to be the motor start mode and the engine is started by the motor. The method according to claim 1,
Wherein,
Wherein the control unit maintains the EV outputable power at a first value when the engine startup mode is set to the engine startup mode and adjusts the EV outputable power to a second value when the engine startup mode is determined, Of the starting control device. Confirming an engine state at the start and stop of the engine;
Determining an amount of air leakage during a stoppage time of the engine using the difference in angular acceleration between the crankshaft and the crankshaft at the start of the engine and at the start of the engine;
Comparing the air leakage amount during the engine stop time with a predefined reference value and determining a start mode of the engine according to the comparison result;
Adjusting an EV outputable power according to the determined startup mode; And
Controlling the start-up of the engine in accordance with the determined start-up mode
And controlling the starting of the vehicle. The method of claim 8,
Wherein the step of determining the air leakage amount comprises:
Estimating a combustion explosion force corresponding to the angular acceleration reduced at the start of the engine by using the angular acceleration of the crankshaft at the start of the engine; And
And calculating an air leakage amount from the estimated combustion explosive force. The method of claim 9,
Further comprising the step of learning the air leakage amount according to the stop time of the engine from the air leakage amount calculated in the step of calculating the air leakage amount. The method of claim 10,
Wherein the step of determining the air leakage amount comprises:
And the air leakage amount corresponding to the stop time of the engine is determined based on the learned air leakage amount information according to the stop time of the engine. The method of claim 8,
Wherein the step of determining the startup mode of the engine includes determining the startup mode to be the engine startup mode if the determined air leakage amount does not exceed the predefined reference value,
Wherein the step of regulating the EV output power includes maintaining the EV output enable power at a first value corresponding to the engine startup mode. The method of claim 8,
Wherein the step of determining the startup mode of the engine includes the steps of determining a startup mode as a motor startup mode when the determined air leakage amount exceeds the predefined reference value,
Wherein the step of regulating the EV output power includes adjusting the EV output enable power to a second value corresponding to the motor startup mode.

Images