KR102356315B1 - Apparatus and method for detecting engine tunning chip - Google Patents

Abstract

Disclosed are an apparatus for detecting an engine tuning chip and a method thereof. The apparatus for detecting an engine tuning chip of the present invention comprises: an intake air pressure sensor sensing an intake air pressure supplied to an engine; an up-throttle pressure sensor sensing an up-throttle pressure according to an opening degree of a throttle valve; a differential pressure sensor sensing a pressure of a fuel boil-off gas in a fuel tank; and a control unit detecting an up-throttle pressure modeling value and an intake air pressure modeling value by modeling the up-throttle pressure or the intake air pressure based on a pressure change amount of the fuel boil-off gas measured by the differential pressure sensor when an engine operation area is an engine boosting area, and detecting the engine tuning chip using the up-throttle pressure modeling value and the intake air pressure modeling value. An objective of the present invention is to provide the apparatus for detecting an engine tuning chip, for modeling the up-throttle pressure and the intake air pressure and detecting the engine tuning chip based thereon, and the method thereof.

Description

Engine tuning chip detection device and method {APPARATUS AND METHOD FOR DETECTING ENGINE TUNNING CHIP}

The present invention relates to an apparatus and method for detecting an engine tuning chip, and more particularly, modeling an up-throttle pressure and an intake air pressure based on a pressure change of a fuel boil-off gas in a fuel tank that occurs due to a flow rate of a purge line in an engine boosting area. And it relates to an engine tuning chip detection apparatus and method for detecting an engine tuning chip based on this.

The engine tuning chip is a device that arbitrarily modulates the intake air pressure and up throttle pressure input to the ECU. The engine tuning chip is a device that induces a torque higher than the reference torque set by the manufacturer. This can cause knocking of the engine or damage spark plugs, which has a fatal effect on engine durability.

However, in the engine tuning chip, the modulation of the signal value is set very precisely, so that the modulation is performed only within the sensor error range, and the modulation is performed only in the boosting area, not the entire section. In addition, the engine tuning chip modulates the sensor input value itself. As a result, in the prior art, it was very difficult for the engine controller to detect the engine tuning chip.

Accordingly, in the related art, a method of measuring the combustion pressure inside a cylinder in order to detect an engine tuning chip has been proposed. However, in this method, in order to detect the engine tuning chip, a pressure sensor for measuring the combustion pressure inside the cylinder must be separately provided, which leads to an increase in manufacturing cost, thereby reducing practicality.

Background art of the present invention is disclosed in 'vehicle electronic control apparatus and method for engine tuning determination' of Korean Patent Registration No. 10-1526881 (June 2, 2015).

The present invention has been devised to improve the above problems, and an object according to an aspect of the present invention is the upthrottle pressure based on the amount of change in the pressure of the fuel vapor in the fuel tank caused by the flow rate of the purge line in the engine boosting region. An object of the present invention is to provide an engine tuning chip detection apparatus and method for modeling excess intake air pressure and detecting an engine tuning chip based on the model.

An apparatus for detecting an engine tuning chip according to an aspect of the present invention includes: an intake pressure sensor for detecting intake air pressure supplied to an engine; an up-throttle pressure sensor that detects an up-throttle pressure according to the opening degree of the throttle valve; a differential pressure sensor for sensing the pressure of the fuel vapor in the fuel tank; and when the engine operation region is the engine boosting region, the up-throttle pressure or intake air pressure is modeled based on the amount of change in the pressure of the BOG measured by the differential pressure sensor to detect the up-throttle pressure modeling value and the intake air pressure modeling value, and the up-throttle pressure modeling value and the intake air pressure modeling value are detected. and a controller configured to detect the engine tuning chip using the throttle pressure modeling value and the intake air pressure modeling value.

The control unit of the present invention equalizes the average value of the modeling average value of the up-throttle pressure modeling value and the intake air pressure modeling value, and the average measurement value obtained by averaging the up-throttle pressure and the intake air pressure measured by the intake air pressure sensor and the up-throttle pressure sensor. to detect the engine tuning chip.

The control unit of the present invention calculates a cluster center vector of the cluster of the modeling average value and the cluster of the measured average value, and detects the engine tuning chip based on the distance between the cluster center vector of the cluster of the modeling average value or the cluster of the measured average value characterized in that

The control unit of the present invention is characterized in that when the distance between the cluster center vectors exceeds a preset distance set value, it is determined that the engine tuning chip is mounted.

The control unit of the present invention is characterized in that the engine rotation speed and the fuel amount in the fuel tank are used as correction values of the up-throttle pressure modeling value and the intake air pressure modeling value.

An engine tuning chip detection method according to an aspect of the present invention includes the steps of: determining, by a control unit, whether an engine operation area is an engine boosting area; detecting, by the controller, an amount of change in the pressure of the BOG based on the pressure of the BOG in the fuel tank when the engine operation area is the engine boosting area; and the control unit models an up-throttle pressure or intake air pressure based on the pressure change amount of the fuel boil-off gas to detect an up-throttle pressure modeling value and an intake air pressure modeling value, and using the up-throttle pressure modeling value and the intake air pressure modeling value It characterized in that it comprises a control unit for detecting the engine tuning chip.

In the step of detecting the engine tuning chip of the present invention, the controller includes a modeling average value of the up-throttle pressure modeling value and the intake air pressure modeling value, and the up-throttle pressure and intake air measured by the intake air pressure sensor and the up-throttle pressure sensor. It is characterized in that the engine tuning chip is detected by averaging the average measured value obtained by averaging the pressure.

In the step of detecting the engine tuning chip of the present invention, the control unit calculates a cluster center vector of the cluster of the modeling average value and the cluster of the measured average value, and the cluster center of the cluster of the modeling average value or the cluster of the measured average value. It is characterized in that the engine tuning chip is detected based on the distance between the vectors.

In the step of detecting the engine tuning chip of the present invention, the controller determines that the engine tuning chip is mounted when the distance between the cluster center vectors exceeds a preset distance set value.

In the detecting of the engine tuning chip of the present invention, the controller uses the engine speed and the fuel amount in the fuel tank as correction values of the up-throttle pressure modeling value and the intake air pressure modeling value.

An apparatus and method for detecting an engine tuning chip according to an aspect of the present invention models an up-throttle pressure and an intake air pressure based on the amount of change in the pressure of the fuel vapor in the fuel tank generated due to the flow rate of the purge line in the engine boosting area, and based on this to detect the engine tuning chip.

The engine tuning chip detection apparatus and method according to another aspect of the present invention can detect the engine tuning chip without the need for a separate pressure sensor, so there is no increase in manufacturing cost and can be applied relatively easily.

The engine tuning chip detection apparatus and method according to another aspect of the present invention can determine whether or not the engine tuning chip is installed, so that it is possible to significantly reduce the quality cost that was consumed due to the manufacturer's negligence.

1 is a block diagram of a dual purge system to which an embodiment of the present invention is applied.
2 is a block diagram of an engine tuning chip detection apparatus according to an embodiment of the present invention.
3 is a view showing a change in pressure inside the fuel tank when the shut-off valve is closed in the boosting region.
4 is a graph showing a distribution of an actual internal pressure value in an engine, a pressure value modulated when an engine tuning chip is installed, and a result of calculating a center vector by k-means clustering thereof according to an embodiment of the present invention.
5 is a flowchart of a method for detecting an engine tuning chip according to an embodiment of the present invention.

Hereinafter, an apparatus and method for detecting an engine tuning chip according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators. Therefore, definitions of these terms should be made based on the content throughout this specification.

1 is a block diagram of a dual purge system to which an embodiment of the present invention is applied.

Referring to FIG. 1 , in the dual purge system to which the embodiment of the present invention is applied, fuel vapor generated by evaporating fuel inside the fuel tank 10 is supplied to the engine system 90 .

The fuel tank 10 stores fuel, and the fuel tank 10 has a fuel sensor 11 for detecting the amount of fuel in the fuel tank 10 , and a differential pressure sensor for detecting the pressure of the fuel vapor gas inside the fuel tank 10 . (12) is installed.

The purge line 50 supplies the fuel vaporized gas in the fuel tank 10 to the engine system 90 . The purge line 50 includes a first purge line 51 to a fifth purge line 55 .

The first purge line 51 has one end connected to the fuel tank 10 and the other end connected to the canister 20 to supply the fuel evaporated gas inside the fuel tank 10 to the canister 20 .

The canister 20 collects the evaporated fuel gas of the fuel tank 10 . The canister 20 is connected to a shut-off valve 30 through a differential pressure connection pipe 40 .

The shut-off valve 30 is always open and creates a pressure difference between the fuel tank 10 and atmospheric pressure. The shut-off valve 30 is closed for engine tuning chip detection.

The dual purge system may include any line or related parts for supplying the engine evaporation gas inside the fuel tank 10 to the engine, and is not particularly limited.

On the other hand, the second purge line 52 has one end connected to the canister 20 and the other end connected to the purge valve 60 to supply the evaporated fuel gas collected in the canister 20 to the purge valve 60 .

The purge valve 60 controls the fuel boil-off gas supply from the engine system 90 . That is, the purge valve 60 controls the purge flow rate to the engine system 90 , and the amount of fuel boil-off gas supplied from the second purge line 52 to the third purge line 53 , and the second purge The amount of fuel evaporation gas supplied from the line 52 to the fourth purge line 54 is adjusted. The purge valve 60 may be a Perge Control Solenoid Valve (PSCV).

The third purge line 53 has one end connected to the purge valve 60 and the other end connected to the injector 70 to supply the fuel vapor supplied from the purge valve 60 to the injector 70 .

The fourth purge line 54 has one end supplied to the injector 70 and the other end connected to the front end of the electronic throttle control valve 92 of the engine system 90 .

Accordingly, the fuel evaporation gas supplied through the purge valve 60 can be supplied to the front end of the electronic throttle control valve 92 through the third purge line 53 , the injector 70 , and the fourth purge line 54 . have.

The fifth purge line 55 has one end connected to the purge valve 60 , and the other end connected to the rear end of the electronic throttle control valve 92 inside the engine system 90 , and is supplied from the purge valve 60 . is supplied to the rear end of the electronic throttle control valve (92).

The injector 70 supplies the fuel boil-off gas to the engine system 90 according to the pressure of the fuel boil-off gas supplied to the front end of the electronic throttle control valve 92 through the third purge line 53 and the fourth purge line 54 . ) is supplied to the intake pipe 94 between the turbine 91 and the air cleaner 80 . The injector 70 may supply the fuel evaporation gas formed in the third purge line 53 and the fourth purge line 54 to the first intake pipe 94 according to the Venturi principle.

The intake pipe 94 between the turbine 91 and the air cleaner 80 of the engine system 90 supplies the air filtered by the air cleaner 80 to the turbine 91, and is As shown, the fuel boil-off gas supplied from the injector 70 is supplied to the turbine 91 .

That is, when the turbocharger is used, the pressure at the front end of the electronic throttle control valve is increased so that a portion of the intake air of the fourth purge line 54 is recirculated. By using the recirculated flow velocity of intake air, the fuel boil-off gas of the third purge line 53 is transferred to the rear end of the air cleaner 80 through the venturi effect, that is, between the turbine 91 of the engine system 90 and the air cleaner 80 . is sucked into the intake pipe 94 of the

An engine 93 is provided inside the engine system 90 and operates according to a control signal of an engine control unit (not shown).

In particular, a second intake pipe 94 is provided inside the engine system 90 , and an electronic throttle control valve 92 is installed in the second intake pipe 94 to control the amount of air supplied to the engine 93 .

The fourth purge line 54 is connected to the front end of the electronic throttle control valve 92 , and the fifth purge line 55 is connected to the rear end thereof.

2 is a block diagram of an engine tuning chip detection apparatus according to an embodiment of the present invention, FIG. 3 is a view showing a change in pressure inside the fuel tank when the shut-off valve is closed in the boosting region, FIG. 4 is It is the result of calculating the center vector by clustering the actual pressure value inside the engine, the distribution of the pressure value modulated when the engine tuning chip is installed, and k-means clustering thereof according to an embodiment of the present invention.

Referring to FIG. 2 , the engine tuning chip detection apparatus according to an embodiment of the present invention includes a driving information detection unit 100 , a shut-off valve 30 , a differential pressure sensor 12 , an engine speed sensor 140 , and a purge It includes a valve 60 , a fuel amount sensor 150 , an intake air pressure sensor 120 , an up throttle pressure sensor 110 , and a control unit 130 .

The driving information sensing unit 100 detects driving information necessary to determine whether the engine driving region is an engine boosting region, such as a target speed, a target torque, a target torque, and an engine load according to the driver's manipulation of the accelerator pedal. The driving information detection unit 100 transmits the measured driving information to the control unit 130 .

The differential pressure sensor 12 senses the pressure of the fuel evaporation gas inside the fuel tank 10 .

The shut-off valve 30 is always open and creates a pressure difference between the fuel tank 10 and atmospheric pressure. The shut-off valve 30 is closed when the engine tuning chip is detected.

For reference, the engine tuning chip is a device that arbitrarily modulates intake air pressure and upthrottle pressure input to an ECU (not shown) for engine control.

The purge valve 60 controls the purge flow rate to the engine system 90 . The purge valve 60 includes the amount of fuel evaporated gas supplied from the second purge line 52 to the third purge line 53 , and the fuel supplied from the second purge line 52 to the fourth purge line 54 . Adjust the amount of boil-off gas.

The engine speed sensor 140 detects the engine speed.

The fuel amount sensor 150 detects the amount of fuel in the fuel tank 10 .

The intake air pressure sensor 120 detects an intake air amount supplied to the engine. The intake pressure sensor 120 is a semiconductor type pressure sensor, and a manifold absolute pressure sensor (MAP sensor) may be used.

The up-throttle pressure sensor (PUT sensor) 110 senses an up-throttle pressure according to the opening degree of the throttle valve.

The control unit 130 models the up-throttle pressure and the intake air pressure based on the change in the pressure signal of the fuel tank generated due to the flow rate of the purge line in the engine boosting area, and detects the engine tuning chip based on this.

More specifically, first, the control unit 130 determines whether the engine operation area is an engine boosting area using information input from the operation information detection unit 100 .

When the engine operation region is an engine boosting region, the controller 130 controls the purge valve 60 by PWM (Pulse Width Modulation). At this time, the amount of evaporated fuel increases due to the venturi effect.

Referring to FIG. 3 , when the control unit 130 closes the shut-off valve 30 in the engine boosting region, the pressure of the boil-off gas in the fuel tank 10 decreases.

That is, the differential pressure sensor 12 senses the pressure of the fuel boil-off gas inside the fuel tank 10 , and inputs the measured pressure of the fuel boil-off gas to the control unit 130 . At this time, the control unit 130 calculates a pressure change amount (Differential Tank Pressure; DTP change amount) of the pressure of the fuel evaporation gas.

The controller 130 models the intake air pressure and the up-throttle pressure of the engine by using the pressure change amount of the fuel boil-off gas, and calculates a modeling average value obtained by averaging the modeled intake air pressure and the up-throttle pressure by a set number.

That is, the controller 130 models the intake air pressure and the up-throttle pressure based on the pressure change amount of the fuel boil-off gas to generate the intake pressure modeling value and the up-throttle pressure modeling value, respectively, and increments the sample counter by 1.

In this case, the controller 130 may model the upthrottle pressure and the intake air pressure by substituting the pressure gradient and the air flow rate inside the fuel tank 10 into Bernoulli's theorem according to atmospheric pressure, vehicle speed, and fuel level. In this case, the controller 130 may use the engine speed and the fuel amount in the tank as correction values.

Meanwhile, the control unit 130 models the intake pressure and the up-throttle pressure, respectively, and whenever the sample counter is incremented by 1, the intake pressure modeling value and the up-throttle pressure modeling value are averaged to calculate the sampling average value. In this process, the sample counter Calculation of the sampling average value is terminated when the counter setting value is exceeded.

In addition, in the above process, the control unit 130 stores the intake air pressure and the up-throttle pressure measured by the intake pressure sensor 120 and the up-throttle pressure sensor 110, respectively, respectively, and the actually measured intake pressure and By averaging the up-throttle pressure, the measured average value of these intake pressure and up-throttle pressure is calculated corresponding to the above-mentioned sample counter. Accordingly, a plurality of measured average values of the intake air pressure and the up throttle pressure are calculated.

Thereafter, the controller 130 performs k-mean clustering on the modeling average values and the measured average values of the intake air pressure and the up throttle pressure, and calculates a distance between the center vectors of the clusters.

The controller 130 compares the distance between the center vectors of the cluster with a preset distance set value, and when the distance between the center vectors of the cluster exceeds the set distance, determines that the engine tuning chip is mounted, and stores the suspicious code.

Here, the cluster may include a cluster of modeling average values of intake air pressure and up throttle pressure, and a cluster of measured average values of intake air pressure and up throttle pressure, and may further include a cluster of intake pressure modeling values.

Referring to FIG. 4 , when the intake air pressure of the engine and the up throttle pressure are modeled through the change amount of the fuel tank pressure, the current intake manifold value is calculated, so the distribution is the same as the 'current state'.

However, when the intake air pressure or up-throttle pressure and intake pressure are modulated by the engine tuning chip, the actually measured up-throttle pressure and intake pressure have the same distribution as the other two clusters (intake air pressure modulation, up-throttle intake pressure modulation). see.

At this time, if sufficient samples are obtained and clustering is performed, a centroid vector may be calculated for each cluster. When the distance of the center vector between the clusters is greater than the set distance, the controller 130 may determine that the signal is modulated by the engine tuning chip and store the suspect code.

Hereinafter, a method for detecting an engine tuning chip according to an embodiment of the present invention will be described in detail with reference to FIG. 5 .

5 is a flowchart of a method for detecting an engine tuning chip according to an embodiment of the present invention.

First, the driving information sensing unit 100 detects driving information necessary to determine whether the driving region is a boosting region, such as a target speed, a target torque, a target torque, and an engine load according to the driver's operation of the accelerator pedal, etc. Enter

The control unit 130 determines whether the engine operation area is an engine boosting area based on the operation information input from the operation information detection unit 100 (S10).

As a result of the determination in step S10 , if the engine operating region is the engine boosting region, the controller 130 PWM controls the purge valve 60 and closes the shutoff valve 30 . As the shut-off valve 30 is closed, the pressure inside the fuel tank is decreased.

On the other hand, the differential pressure sensor 12 senses the pressure of the fuel evaporation gas inside the fuel tank 10 . The control unit 130 calculates a change amount of differential tank pressure (DTP) of the fuel boil-off gas based on the pressure of the fuel boil-off gas inside the fuel tank 10 ( S20 ).

Next, the control unit 130 models the intake air pressure and the up-throttle pressure of the engine based on the pressure change amount of the fuel boil-off gas to calculate the intake air pressure modeling value and the up-throttle pressure modeling value, and at this time, the sample counter is incremented by 1 (S30) .

In this process, the control unit 130 receives the engine rotation speed and the fuel amount in the fuel tank 10 from each of the engine rotation speed sensor 140 and the fuel amount sensor 150 , and uses them as an upthrottle pressure modeling value and an intake air pressure modeling value. It can be used as a correction value for

Then, in the above process, the control unit 130 stores the intake air pressure and the up-throttle pressure measured by the intake pressure sensor 120 and the up-throttle pressure sensor 110, respectively, and stores the actually measured intake air pressure and the up-throttle pressure, respectively. A measured average value is calculated by averaging the pressure (S40).

Thereafter, the control unit 130 calculates a modeling average value by averaging the intake air pressure modeling value and the upthrottle pressure modeling value ( S50 ), and determines whether the sample counter exceeds a counter setting value ( S60 ).

As a result of the determination in step S60, if the sample counter exceeds the counter set value, k-means clustering of the modeling average value and the measured average value is performed (S70). When the sample counter exceeds the counter setting value, the control unit 130 obtains the modeling average value and the measurement average value of the set number, respectively.

Next, the controller 130 clusters the modeling average value and the measurement average value, and calculates a distance between the cluster center vectors between the clusters of the modeling average values and the clusters of the measured average values. Here, the cluster of modeling average values may include not only the cluster of modeling average values of intake air pressure and up-throttle pressure as described above, but also a cluster of intake air pressure modeling values.

Next, the controller 130 compares the distance between the center vectors of each cluster with a set distance to determine whether the distance between the center vectors of the clusters exceeds the set value (S80).

As a result of the determination in step S80, if the distance between the center vectors of the cluster exceeds the set value, the controller 130 determines that the engine tuning chip is mounted and stores the suspect code (S90).

The engine tuning chip detection apparatus and method according to an embodiment of the present invention models the upthrottle pressure and the intake air pressure based on the change in the pressure signal of the fuel tank generated due to the flow rate of the purge line in the boosting area, and based on this, the engine Detect the tuning chip.

In addition, the engine tuning chip detection apparatus and method according to an embodiment of the present invention can detect the engine tuning chip without the need for a separate pressure sensor, there is no increase in manufacturing cost, and can be applied relatively easily.

In addition, the engine tuning chip detection apparatus and method according to an embodiment of the present invention can determine whether or not the engine tuning chip is installed, so that it is possible to significantly reduce the quality cost that was consumed due to the manufacturer's negligence.

Implementations described herein may be implemented in, for example, a method or process, an apparatus, a software program, a data stream, or a signal. Although discussed only in the context of a single form of implementation (eg, discussed only as a method), implementations of the discussed features may also be implemented in other forms (eg, as an apparatus or program). The apparatus may be implemented in suitable hardware, software and firmware, and the like. A method may be implemented in an apparatus such as, for example, a processor, which generally refers to a computer, a microprocessor, a processing device, including an integrated circuit or programmable logic device, and the like. Processors also include communication devices such as computers, cell phones, portable/personal digital assistants (“PDA”) and other devices that facilitate communication of information between end-users.

Although the present invention has been described with reference to the embodiment shown in the drawings, this is merely exemplary, and it is understood that various modifications and equivalent other embodiments are possible by those of ordinary skill in the art. will understand Accordingly, the true technical protection scope of the present invention should be defined by the following claims.

10: driving information detection unit 12: differential pressure sensor
30: shut-off valve 60: purge valve
110: up throttle pressure sensor 120: intake pressure sensor
130: control unit 140: engine speed sensor
150: fuel level sensor

Claims (10)

Intake air pressure sensor supplied to the engine;
an up-throttle pressure sensor that senses an up-throttle pressure according to the opening degree of the throttle valve;
a differential pressure sensor for sensing the pressure of the fuel vapor in the fuel tank; and
When the engine operating region is the engine boosting region, the upthrottle pressure or intake air pressure is modeled based on the amount of change in the pressure of the BOG measured by the differential pressure sensor to detect the upthrottle pressure modeling value and the intake air pressure modeling value, and the upthrottle pressure modeling value and the intake pressure modeling value are detected. A control unit for detecting the engine tuning chip using the pressure modeling value and the intake air pressure modeling value,
The control unit averages the modeling average value of the up-throttle pressure modeling value and the intake air pressure modeling value, and the average measured value obtained by averaging the up-throttle pressure and the intake pressure measured by the intake air pressure sensor and the up-throttle pressure sensor to average the engine tuning chip. Engine tuning chip detection device, characterized in that for detecting the. delete According to claim 1, wherein the control unit
Calculate the cluster center vector of the cluster of the modeling average value and the cluster of the measured average value, and detect the engine tuning chip based on the distance between the cluster center vector of the cluster of the modeling average value or the cluster of the measured average value Tuning chip detection device. The method of claim 3, wherein the control unit
Engine tuning chip detection apparatus, characterized in that it is determined that the engine tuning chip is mounted when the distance between the cluster center vectors exceeds a preset distance set value. Intake air pressure sensor supplied to the engine;
an up-throttle pressure sensor that senses an up-throttle pressure according to the opening degree of the throttle valve;
a differential pressure sensor for sensing the pressure of the fuel vapor in the fuel tank; and
When the engine operating region is the engine boosting region, the upthrottle pressure or intake air pressure is modeled based on the amount of change in the pressure of the BOG measured by the differential pressure sensor to detect the upthrottle pressure modeling value and the intake air pressure modeling value, and the upthrottle pressure modeling value and the intake pressure modeling value are detected. A control unit for detecting the engine tuning chip using the pressure modeling value and the intake air pressure modeling value,
The control unit uses the engine speed and the fuel amount in the fuel tank as correction values of the up-throttle pressure modeling value and the intake air pressure modeling value. determining, by the controller, whether the engine operation area is an engine boosting area;
detecting, by the controller, an amount of change in the pressure of the BOG based on the pressure of the BOG in the fuel tank when the engine operation area is the engine boosting area; and
The control unit models an up-throttle pressure or intake air pressure based on the pressure change amount of the fuel boil-off gas to detect an up-throttle pressure modeling value and an intake air pressure modeling value, and the engine using the up-throttle pressure modeling value and the intake air pressure modeling value detecting a tuning chip,
In the step of detecting the engine tuning chip, the controller averages the modeling average value of the upthrottle pressure modeling value and the intake air pressure modeling value, and the upthrottle pressure and intake pressure measured by the intake air pressure sensor and the upthrottle pressure sensor. Engine tuning chip detection method, characterized in that the engine tuning chip is detected by averaging the measured average values. delete The method of claim 6, wherein in the detecting of the engine tuning chip,
The control unit calculates a cluster center vector of the cluster of the modeling average value and the cluster of the measured average value, and detects the engine tuning chip based on the distance between the cluster center vector of the cluster of the modeling average value or the cluster of the measured average value. engine tuning chip detection method. The method of claim 8, wherein in the detecting of the engine tuning chip,
Wherein the controller determines that the engine tuning chip is mounted when the distance between the cluster center vectors exceeds a preset distance set value. determining, by the controller, whether the engine operation area is an engine boosting area;
detecting, by the controller, an amount of change in the pressure of the BOG based on the pressure of the BOG in the fuel tank when the engine operation area is the engine boosting area; and
The control unit models an up-throttle pressure or intake air pressure based on the pressure change amount of the fuel boil-off gas to detect an up-throttle pressure modeling value and an intake air pressure modeling value, and the engine using the up-throttle pressure modeling value and the intake air pressure modeling value detecting a tuning chip,
In the detecting of the engine tuning chip, the control unit uses the engine speed and the fuel amount in the fuel tank as correction values of the up-throttle pressure modeling value and the intake air pressure modeling value.

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