KR102071222B1 - The control system of electronic vacuum booster and control method of the same - Google Patents

Abstract

The electronic vacuum booster of the vehicle includes a vacuum booster for generating a vacuum pressure to double the pedal pedal effort, and an electronic vacuum pump connected to the vacuum booster to form a vacuum necessary for generating the vacuum pressure. The electronic vacuum power control system includes a first vacuum sensor and a second vacuum sensor for detecting a vacuum pressure of the vacuum booster, and a vacuum control unit for determining a malfunction of the electronic vacuum power supply device. The controller provides an electronic vacuum power control system and a control method thereof, wherein a normal vacuum range of the vacuum pressure and a target time at which the vacuum pressure is maintained within the normal vacuum range are input.

Description

The control system of electronic vacuum booster and control method of the same

The present invention relates to an electronic vacuum power control system for controlling an electronic vacuum power equipment of a vehicle and a control method thereof.

The brake of the vehicle is driven by transmitting the force for depressing the brake pedal, that is, the pedal force, to the master cylinder of the brake and converting the hydraulic pressure into hydraulic pressure. As the performance of the vehicle is improved due to the continuous development of automobile technology, it is difficult to secure sufficient braking force only by the driver's effort, and a vacuum power system was developed to secure the braking force of the brake.

Vacuum booster is a device that doubles brake braking force by using pressure difference between atmospheric pressure and vacuum, and adopts vacuum booster to apply vacuum force to driver's foot force to deliver doubled hydraulic force to each brake, thereby improving braking force do.

Hybrid vehicles or light vehicles that are being actively developed in recent years require engines to be smaller and lighter in weight, and as engines become smaller and lighter, there is a shortage of actual braking force compared to the theoretical braking force of the vehicle due to the lack of vacuum in the vacuum power system. It can affect braking.

In order to solve this problem, an electronic vacuum boosting device has been developed, in which an electronic vacuum pump is added to assist the vacuum force. The vehicle is controlled by a vehicle control unit, which is commonly called a controller (ECU).

The controller is not only responsible for the control of the electronic vacuum pump, but also used for the limp home mode control of the vehicle. Lymphhome mode prevents major accidents caused by larger malfunctions by limiting engine output by the controller when a critical fault is detected in the engine or driving system. It is a safe mode for moving.

However, the electronic acceleration control (ETC), which is represented by X-by-wire, is connected to the ECU to control the amount of air and fuel for the acceleration of the vehicle. If this occurs, excess air and fuel can be supplied to the intake manifold. In this case, the speed of the fluid inside is significantly reduced and the pressure increases, which may cause a problem that sufficient vacuum degree for braking is not prepared.

In addition, as mentioned above, the fuel mixture air supplied due to the failure of the electronic acceleration control device causes a sudden ideal output of the vehicle and at the same time makes it difficult to prepare the vacuum degree in the power required for braking, thereby causing a fatal accident such as a sudden acceleration failure. May cause.

In addition, the conventional vacuum power supply is using a lot of implementations using only one vacuum sensor for detecting the vacuum pressure of the vacuum booster, in the case of such an implementation, the output value of the vacuum sensor may cause an error, which causes the vacuum power supply Malfunction may occur. Therefore, it is necessary to develop the control technology of the electronic vacuum power system for the driver's safety and stable vehicle operation.

Korean Unexamined Patent Publication No. 10-2017-0118378 (published date: 20017.10.25) Japanese Patent No. 3723001 (Announcement date: September 22, 2005)

The technical problem to be achieved by the present invention is to improve the error recognition of the vacuum sensors and the vacuum power system and to control the electronic vacuum power control system and the electronic vacuum power control system to stably maintain the target degree of vacuum stably. The purpose is to provide.

In addition, another technical problem to be achieved by the present invention, by comparing the time to reach the normal vacuum range of the electronic vacuum pump and the target time to reach the vacuum pressure of the vacuum booster to detect the malfunction of the vacuum sensor or the malfunction of the electronic vacuum pump lymph lymphatic mode An object of the present invention is to provide an electronic vacuum power control system capable of providing a signal and a control method thereof.

Furthermore, another technical problem to be achieved by the present invention is an electronic vacuum power control system and control thereof, which can further reduce the possibility of an error in the vacuum power control system by repeatedly verifying the states of the vacuum sensors and the electronic vacuum pump through multiple paths. The purpose is to provide a method.

The object of the present invention is not limited to the above-mentioned object, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

To solve the above problems, the present invention provides an electronic vehicle including a vacuum booster for generating a vacuum pressure to double the pedal effort of the brake pedal, and an electronic vacuum pump connected to the vacuum booster to form a vacuum necessary for generating the vacuum pressure. The vacuum booster includes an electronic vacuum booster control system, and the electronic vacuum booster control system determines a malfunction of the first vacuum sensor and the second vacuum sensor for detecting the vacuum pressure of the vacuum booster and the electronic vacuum booster. And a vacuum control unit, wherein the vacuum control unit is provided with a normal vacuum range of the vacuum pressure and a target time for maintaining the vacuum pressure within the normal vacuum range.

The vacuum controller may control the electronic vacuum pump, the first vacuum sensor, and the second vacuum sensor when the sensor value of the first vacuum sensor and the sensor value of the second vacuum sensor maintain the normal vacuum range for the target time. You can judge it as normal.

The vacuum controller may include a first path configured to repeatedly perform an operation of comparing the target time with the time of reaching the normal vacuum range, and the first vacuum sensor or the second vacuum sensor may be configured according to the first path. Malfunctions can be determined.

The vacuum controller may set a warning signal and change a limp home mode when a malfunction of the first vacuum sensor or the second vacuum sensor is determined by performing the first path.

The vacuum control unit is configured to control an electronic vacuum pump using a sensor value of a vacuum sensor estimated to be a malfunction among the first vacuum sensor and the second vacuum sensor, and compare the target time with a time for reaching the normal vacuum range. A second path for repeating operation may be set to verify a state determined as the first path.

When it is determined that the malfunction of the first vacuum sensor or the second vacuum sensor is determined, the vacuum controller may set a warning signal and change a limp home mode.

In addition, to solve the above problems, the present invention comprises the steps of setting and storing the normal vacuum range of the vacuum booster vacuum pressure, the target time that the vacuum pressure is maintained within the normal vacuum range to the vacuum control unit; Sensing and measuring a vacuum pressure of the vacuum booster by a first vacuum sensor and a second vacuum sensor; When the sensor value of the first vacuum sensor and the sensor value of the second vacuum sensor maintain a normal vacuum range for a target time, the electronic vacuum pump, the first vacuum sensor and the second vacuum sensor are determined to be normal, and the electronic vacuum Maintaining a driving state of the power supply apparatus; Operating the electronic vacuum pump according to a sensor value close to atmospheric pressure when a sensor value of the first vacuum sensor or a sensor value of the second vacuum sensor is out of the vacuum range for a target time; And determining a malfunction sensor among the first vacuum sensor or the second vacuum sensor by comparing the target time with the time of reaching the normal vacuum range.

The vacuum controller determines the malfunction sensor, wherein a first path for repeatedly performing the operation of comparing the target time with the time of reaching the normal vacuum range is preset, and the malfunction sensor is determined according to the first path. It may be.

If the malfunction of the first vacuum sensor or the second vacuum sensor is determined by the performance of the first path may include providing a warning signal, and setting the limp home mode switching.

The electronic vacuum pump is controlled by a sensor value of a vacuum sensor estimated to be a malfunction among the first vacuum sensor and the second vacuum sensor, and the vacuum controller reaches the target time and the normal vacuum range according to a preset second path. And repeating the operation of comparing the time.

The vacuum controller verifies the state determined as the first path by performing the second path, provides a warning signal when a malfunction of the first vacuum sensor or the second vacuum sensor is determined, and switches the lymph groove mode. It may include the step of setting.

The electronic vacuum power control system and control method thereof according to the present invention have an effect of improving the error recognition of the vacuum sensors and the system and controlling the electronic vacuum power supply to stably maintain the desired degree of vacuum.

In addition, by comparing the time to reach the normal vacuum range of the electronic vacuum pump and the target time to reach the vacuum pressure of the vacuum booster, there is an advantage that can detect the malfunction of the vacuum sensor or the malfunction of the electronic vacuum pump and provide a limp home mode signal.

 Furthermore, by repeatedly verifying the state of the vacuum sensors and the electronic vacuum pump through the multi-path of the vacuum control unit, there is an advantage that the possibility of an error in the vacuum power control system can be further lowered.

1 is a block diagram of an electronic vacuum powering apparatus according to an embodiment of the present invention,
2 is a graph showing sensor values and a normal range of a first vacuum sensor and a second vacuum sensor which operate normally according to an embodiment of the present invention;
3 is a step-by-step flowchart showing an electronic vacuum power control system according to an embodiment of the present invention,
4 and 5 are graphs illustrating a case in which a sensor value of a first vacuum sensor or a second vacuum sensor according to an embodiment of the present invention is out of a normal range.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below are provided as examples to fully convey the spirit of the present invention to those skilled in the art. Accordingly, the invention is not limited to the embodiments described below and may be embodied in other forms. In the drawings, lengths, thicknesses, and the like of layers and regions may be exaggerated for convenience. Like numbers refer to like elements throughout.

1 is a configuration diagram of an electronic vacuum power booster according to an embodiment of the present invention, Figure 2 is a graph showing the sensor value and the normal range of the first vacuum sensor and the second vacuum sensor that operates normally according to an embodiment of the present invention 3 is a step-by-step flowchart showing the electronic vacuum power control system according to an embodiment of the present invention, Figures 4 and 5 are the sensor value of the first vacuum sensor or the second vacuum sensor according to an embodiment of the present invention is normal. These graphs show cases out of range. In the graphs of FIGS. 2, 4, and 5, the Y axis represents pressure. When the Y axis is expressed in a large upward direction of the Y axis, it means a relatively high pressure, such as atmospheric pressure, and the closer to 0 (X axis), the vacuum. Means close to the pressure.

Referring to FIG. 1, a general electronic vacuum booster includes a vacuum booster 20 for generating a vacuum pressure to double the pedaling force of the brake pedal 10, and a vacuum connected to the vacuum booster 20 and required for generating the vacuum pressure. An electronic vacuum pump (EVP) to form a. The vacuum booster 20 is connected to the brake 40 through the hydraulic pipe (A). Electronic vacuum power equipment can be used in electric vehicles, hybrid vehicles, internal combustion engines, and the like.

The electronic vacuum boosting device includes an electronic vacuum boosting control system 50, and the electronic vacuum boosting control system 50 includes a first vacuum sensor and a second vacuum sensor for detecting a vacuum pressure of the vacuum booster 20. And a vacuum control unit for determining a malfunction of the electronic vacuum power booster.

The first vacuum sensor and the second vacuum sensor detect the vacuum pressure of the vacuum booster 20, respectively, and improve the detection reliability of the vacuum sensors through the vacuum pressure detection duplication. For example, the first vacuum sensor or the second vacuum sensor may be a MEMS sensor.

The vacuum control unit may be implemented as a separate controller from the engine control unit (ECU) for controlling the entire system of the vehicle, and by implementing the functions of the vacuum control unit in S / W, such as ECU, VCU that was used in the existing vehicle By migrating to the controller, it is possible to implement the function of the vacuum control unit according to the present invention in the conventional vehicle controller.

The vacuum controller may set a normal vacuum range of the vacuum pressure in the vacuum booster 20 chamber and a target time for maintaining the vacuum pressure within the normal vacuum range.

The vacuum controller may determine in real time whether the vacuum pressure is within the normal vacuum range by detecting the vacuum pressure of the vacuum booster 20 in real time through the sensor values of the vacuum sensors. Specifically, the normal range may be achieved by storing the estimated values of the vacuum sensor measured or calibrated through various experiments when the corresponding vacuum sensors are manufactured, in the vacuum control unit. In addition, these estimates may be mathematically modeled as a function of various factors of the vacuum sensor, where the various factors may be modeled including the altitude (pressure) at which the vacuum sensor operates, temperature, life expectancy of the sensor, and the like.

In addition, the vacuum control unit may set the current supply time of the electronic vacuum pump 30 as a parameter corresponding to the target time of the vacuum booster 20. The vacuum controller compares the current supply time, which can be regarded as a normal operation time of the electronic vacuum pump 30, with a target time for maintaining the normal vacuum range of the vacuum booster 20, and compares the vacuum sensors or the electronic vacuum pump ( The malfunction of 30) can be judged. That is, the current supply time may be referred to as a time when the electronic vacuum pump 30 operates normally to reach a normal vacuum range.

As shown in FIG. 2, when the sensor value of the first vacuum sensor and the sensor value of the second vacuum sensor maintain a normal vacuum range for a target time, the vacuum control unit as shown in FIG. 3 includes the electronic vacuum pump 30 and the first vacuum sensor. And the second vacuum sensor may be determined to be normal (S332).

As shown in FIG. 3, the vacuum control unit is set with a first path R1 which repeats an operation of comparing the target time with the time of reaching the normal vacuum range, and sets the first path R1 according to the first path R1. Malfunctions of the first vacuum sensor and the second vacuum sensor can be determined.

For example, after detecting the real-time vacuum degree with the first vacuum sensor and the second vacuum sensor and determining the sensor values, if a sensor value close to atmospheric pressure appears as shown in the second vacuum sensor of FIG. 4, the electronic vacuum pump ( 30) can be activated. As the electronic vacuum pump 30 proceeds with the vacuum formation based on the measured value close to the atmospheric pressure, the vacuum pressure formation of the vacuum booster 20 may be stably performed. In addition, by comparing the operation time of the electronic vacuum pump 30, that is, the time to reach the normal vacuum range with the target time of the vacuum booster 20, if it is abnormal, the corresponding vacuum sensor may be determined as a malfunction.

When the time in the normal range (t2, t3) and the time in the abnormal range (t1, t4) is irregularly detected as shown in the second vacuum sensor of FIG. 5, the target time and the normal vacuum range through the first path (R1) By repeating the operation of comparing the time to reach it can determine the malfunction of the sensor. That is, at the time t2 and t3, the vacuum pressure within the target time is reached, so that the corresponding vacuum sensor may be determined to be normal, but at the time t1 and t4, it may be determined to be abnormal, so that the first path (R1) ), It is possible to verify a vacuum sensor that is considered to be malfunctioning. Therefore, error recognition of the vacuum sensors can be improved, and stable vacuum pressure can be provided to the electronic vacuum power booster.

When it is determined that the first vacuum sensor or the second vacuum sensor malfunctions by performing the first path R1, the vacuum control unit may set a warning signal and change a limp home mode. Therefore, by comparing the time to reach the normal vacuum range and the target time of the vacuum pressure of the vacuum booster 20, it is possible to detect the malfunction of the vacuum sensor or the malfunction of the electronic vacuum pump to provide a limp home mode signal. The reason why the limp groove mode is set to force the engine power is limited because the vacuum of the vacuum power system may not be properly formed, and thus it may be difficult for the brake power to be properly made.

In addition, the vacuum controller controls the electronic vacuum pump 30 with the sensor value of the vacuum sensor estimated as the potential malfunction by setting the second path R2, and again comparing the target time with the time of reaching the normal vacuum range. By repeating, it is possible to re-verify the state determined as the first path.

Further, the vacuum controller may further prevent an error of the vacuum power control system by setting the third path R3 as a sub-algorithm and continuously verifying the states of the vacuum sensors and the electronic vacuum pump. For example, when the second path R2 is repeatedly performed N times at a time interval of 10 seconds or more, the third path R3 as the sub algorithm repeatedly performs n times at a time interval of several seconds to further detect an error occurrence. It can be performed precisely.

Repeating this process can be seen as a conservative control. Therefore, error recognition of the vacuum sensors can be further improved, and stable vacuum pressure can be controlled in the electronic vacuum power booster.

2 to 5, the electronic vacuum power control method according to an embodiment of the present invention will be described, first, the vacuum control unit is set (S310). Setting the vacuum control unit sets and stores the normal vacuum range of the vacuum booster 20 vacuum pressure and the target time at which the vacuum pressure is maintained within the normal vacuum range. At this time, the current supply time of the electronic vacuum pump 30 corresponding to the target time can be set and stored in the vacuum control unit. In addition, the current supply time may be referred to as a time when the electronic vacuum pump 30 operates normally to reach a normal vacuum range.

As a result, the vacuum control unit may determine the time to reach the normal vacuum range and the target time of the vacuum booster 20, and determine the malfunction of the vacuum sensors or the electronic vacuum pump 30.

Next, the real-time vacuum degree is detected (S320). The first vacuum sensor and the second vacuum sensor may sense the vacuum pressure of the vacuum booster in real time, and the sensor value may be measured.

The vacuum control unit then determines the sensor value (S330). The vacuum controller may determine in real time whether the vacuum pressure of the vacuum booster 20 is within the normal vacuum range based on the measured sensor value. Specifically, the normal range may be achieved by storing the estimated values of the vacuum sensor measured or calibrated through various experiments when the corresponding vacuum sensors are manufactured, in the vacuum control unit. In addition, these estimates may be mathematically modeled as a function of various factors of the vacuum sensor, where the various factors may be modeled including the altitude (pressure) at which the vacuum sensor operates, temperature, life expectancy of the sensor, and the like.

As shown in FIG. 2, when it is determined that the sensor values of the vacuum sensors maintain a normal vacuum range for a target time, the vacuum controller may determine the electronic vacuum pump 30, the first vacuum sensor, and the second vacuum sensor as normal. (S332), and maintains the driving state of the electronic vacuum power booster.

However, when the sensor value of the first vacuum sensor or the sensor value of the second vacuum sensor is out of the vacuum range for the target time, the electronic vacuum pump is controlled according to the sensor value close to the atmospheric pressure (S340). As the electronic vacuum pump 30 proceeds with the vacuum formation based on the measured value close to the atmospheric pressure, the vacuum pressure formation of the vacuum booster 20 may be stably performed.

While controlling the electronic vacuum pump 30, the target time of the vacuum booster 20 is compared with the time to reach the normal vacuum range (S350). If the vacuum control unit determines that the target time and the time to reach the normal vacuum range is abnormal, it may be determined that the vacuum sensor having a sensor value close to atmospheric pressure as a malfunction (S350A). For example, when a sensor value close to atmospheric pressure appears as shown in the second vacuum sensor of FIG. 4, the electronic vacuum pump 30 may be operated based on the value, and the abnormality may be obtained by comparing the operation time and the target time of the electronic vacuum pump. In this case, the corresponding vacuum sensor may be determined to be malfunctioning.

In addition, the process of S330 to S350 is preset as the first path R1 in the vacuum control unit, and the operation of comparing the target time and the time to reach the normal vacuum range according to the first path R1 is repeatedly performed. By this, malfunction of the sensor can be discriminated.

For example, when the time in the normal range (t2, t3) and the time in the abnormal range (t1, t4) is irregularly detected as shown in the second vacuum sensor of Figure 5, the target time and the target time through the first path (R1) By repeating the operation of comparing the time to reach the normal vacuum range, it is possible to determine the malfunction of the sensor. That is, at the time t2 and t3, the vacuum pressure within the target time is reached, so that the corresponding vacuum sensor may be determined to be normal, but at the time t1 and t4, it may be determined to be abnormal, so that the first path (R1) ), It is possible to verify a vacuum sensor that is considered to be malfunctioning. Therefore, error recognition of the vacuum sensors can be improved, and stable vacuum pressure can be controlled in the electronic vacuum power booster. As a result, the vacuum sensor measured by the sensor value close to the atmospheric pressure through the first path (R1) can be determined as a malfunction (S250A).

Thereafter, the state determined as the first path R1 may be continuously and repeatedly verified through the second path R2. That is, the electronic vacuum pump is controlled by a sensor value of the vacuum sensor estimated as a malfunction among the first vacuum sensor and the second vacuum sensor, that is, a sensor value close to atmospheric pressure (S360), and the vacuum controller controls the preset second path. The method may include repeating an operation of comparing the target time with the time of reaching the normal vacuum range (S370).

In addition, the vacuum controller may further prevent an error of the vacuum power control system by repeatedly verifying the states of the vacuum sensors and the electronic vacuum pump by setting the third path R3 as a sub-algorithm. For example, when the second path R2 is repeatedly performed N times at a time interval of 10 seconds or more, the third path R3 as the sub algorithm repeatedly performs n times at a time interval of several seconds to further detect an error occurrence. It can be performed precisely. Repeating this process can be seen as a conservative control.

If the paths R1, R2, and R3 determine that the corresponding vacuum sensor is malfunctioning (S350A, S370A, S390A), that is, when the malfunction of the first vacuum sensor or the second vacuum sensor is determined, the vacuum control unit generates a warning signal. Can be provided (SA302).

In addition, when a malfunction of the electronic vacuum pump is suspected when a malfunction of the first vacuum sensor or the second vacuum sensor is estimated, the electronic vacuum pump may be controlled by a vacuum sensor determined to be normal among the vacuum sensors (SA304). ).

At this time, the vacuum control unit detects the vacuum pressure of the vacuum booster 20 by the sensor value of the vacuum sensor that is normally determined, and compares the target time of the vacuum booster 20 with the time to reach the normal vacuum range, whether the electronic vacuum pump is normal It may be determined (SA306).

Thereafter, when the electronic vacuum pump is determined to be normal, the control flow of the electronic vacuum power system may be terminated, and when the electronic vacuum pump is determined to be abnormal, it may be switched to the lymph groove mode (SA308).

Apart from the above process, when a malfunction of the first vacuum sensor or the second vacuum sensor is determined by the execution of the first path R1 (S350A), a warning signal is provided (SA302) without the process of SA304 and SA306. , Lymphocyte mode switching (SA308) can be set. Similarly, when the vacuum control unit repeatedly verifies the state determined as the first path R1 by performing the second path R2, and when a malfunction of the first vacuum sensor or the second vacuum sensor is determined ( S370A) it is possible to provide a warning signal (SA302), and set the lymph groove mode switch (SA308).

The vacuum power control system and the control method thereof are methods for controlling the vacuum power supply from a conservative point of view, which prioritizes the driver's safety, and drive the brake of the vacuum power booster due to stable vacuum pressure formation of the vacuum booster 20. Can be performed more safely.

In addition, the electronic vacuum power control system and the control method of the first vacuum sensor and the second by comparing the time to reach the normal vacuum range and the target time that the inside of the vacuum booster 20 is expected to reach a vacuum. Among the vacuum sensors, there is an advantage in that a vacuum sensor in which an error occurs can be determined. That is, when the sensor values of the vacuum sensors are different and the target time and the time to reach the normal vacuum range are matched with each other, each sensor value may be compared in real time to find a vacuum sensor in which an error occurs. Therefore, the error recognition of the vacuum sensors is improved, there is an effect that can control the stable vacuum pressure in the electronic vacuum power unit.

In addition, by comparing the time to reach the normal vacuum range and the time to reach the vacuum pressure of the vacuum booster, it can detect the malfunction of the vacuum sensor or the malfunction of the electronic vacuum pump and provide the lymph home mode signal. Can be.

 Furthermore, by repeating and verifying the states of the vacuum sensors and the electronic vacuum pump in real time through the repetition of the multiple paths R1, R2 and R3 of the vacuum control unit, there is an advantage of further preventing an error of the vacuum power control system.

In the present invention, the limp home mode is proposed as a countermeasure for the error of the vacuum booster, the electronic vacuum pump, the vacuum sensor, and the electronic vacuum booster. And other appropriate countermeasures.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

10; Brake pedal, 20; Vacuum Booster,
30; Electronic vacuum pump, 40; brake,
50; Vacuum control module for vacuum power booster

Claims (11)

The electronic vacuum booster of the vehicle includes a vacuum booster for generating a vacuum pressure to double the pedal pedal effort, and an electronic vacuum pump connected to the vacuum booster to form a vacuum necessary for generating the vacuum pressure. And
The electronic vacuum power control system,
The first vacuum sensor and the second vacuum sensor for detecting the vacuum pressure of the vacuum booster, and the vacuum control unit for determining the malfunction of the electronic vacuum power booster,
The vacuum controller is configured to input a target time at which the normal vacuum range of the vacuum pressure and the vacuum pressure are maintained within the normal vacuum range, and repeatedly perform an operation of comparing the target time with the time of reaching the normal vacuum range. A first path is set, a malfunction of the first vacuum sensor or the second vacuum sensor is determined according to the first path, and a sensor of the vacuum sensor estimated to be a malfunction of the first vacuum sensor and the second vacuum sensor. A second path for controlling the electronic vacuum pump with the value and repeating the operation of comparing the target time with the time for reaching the normal vacuum range is set to verify the state determined as the first path. Electronic vacuum power control system.
The method of claim 1,
The vacuum controller may control the electronic vacuum pump, the first vacuum sensor, and the second vacuum sensor when the sensor value of the first vacuum sensor and the sensor value of the second vacuum sensor maintain the normal vacuum range for the target time. Electronic vacuum power control system, characterized in that judged to be normal.
delete The method of claim 1,
The vacuum control unit, when the malfunction of the first vacuum sensor or the second vacuum sensor is determined by the performance of the first path, the electronic vacuum power control system, characterized in that for setting the warning signal supply and lymph groove mode switching .
delete The method of claim 1,
The vacuum control unit, when the malfunction of the first vacuum sensor or the second vacuum sensor is determined, the electronic vacuum power control system, characterized in that for setting the warning signal and lymph groove mode switching.
Setting and storing a normal vacuum range of a vacuum booster vacuum pressure, and a target time at which the vacuum pressure is maintained within the normal vacuum range to a vacuum control unit;
Sensing and measuring a vacuum pressure of the vacuum booster by a first vacuum sensor and a second vacuum sensor;
When the sensor value of the first vacuum sensor and the sensor value of the second vacuum sensor maintain a normal vacuum range for a target time, the electronic vacuum pump, the first vacuum sensor and the second vacuum sensor are determined to be normal, and the electronic vacuum power Maintaining the driving state of the device;
Operating the electronic vacuum pump according to a sensor value close to atmospheric pressure when a sensor value of the first vacuum sensor or a sensor value of the second vacuum sensor is out of the vacuum range for a target time; And
And determining a malfunction sensor among the first vacuum sensor and the second vacuum sensor by comparing the target time with a time of reaching the normal vacuum range.
The method of claim 7, wherein
The vacuum controller determines the malfunction sensor, wherein a first path for repeatedly performing the operation of comparing the target time with the time of reaching the normal vacuum range is preset, and the malfunction sensor is determined according to the first path. Electronic vacuum power control method, characterized in that.
The method of claim 8,
When the malfunction of the first vacuum sensor or the second vacuum sensor is determined by the performance of the first path, providing a warning signal, and setting the limp home mode switching method comprising the electronic vacuum power control method .
The method of claim 8,
The electronic vacuum pump is controlled by a sensor value of a vacuum sensor estimated to be a malfunction among the first vacuum sensor and the second vacuum sensor, and the vacuum controller reaches the target time and the normal vacuum range according to a preset second path. And repeating the step of comparing the time for performing the electronic vacuum power control method.
The method of claim 10,
The vacuum controller verifies the state determined as the first path by performing the second path, provides a warning signal when a malfunction of the first vacuum sensor or the second vacuum sensor is determined, and switches the lymph groove mode. Electronic vacuum power control method comprising the step of setting.

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