Methods for detecting errors in the transmission for four stages

Abstract

The present invention relates to a method for detecting errors in a 4-speed transmission. The procedure comprises a vehicle control unit (VCU), a transmission control unit (TCU), a transmission motor driver, an encoder, a transmission motor, a transmission, a drive motor, and an inverter. When the vehicle's Key-on switch is switched to the ON state and the Start selector switch is actuated, an electrical signal is transmitted to the vehicle control unit according to the transmission information signals of P, R, N, and D of the gear drive unit. When the corresponding selection signal is received via CAN communication and a drive signal is transmitted to the transmission control unit (TCU), the position of the fork that changes the internal gear of the transmission connected to the transmission motor shaft is moved according to the motor speed information and direction data signals of the transmission motor driver regarding the transmission information, thereby moving the transmission gear to the normal gear position by the transmission motor driver. A control command is then transmitted to the transmission motor driver using a GPIO Port to transmit the selected transmission gear data, and the transmission gear information is compared and detected with the transmission position information transmitted to the position sensor. The result is received and transmitted to the vehicle control unit (VCU). It operates so that the corresponding status information is displayed in the cluster (Clustsr).

Description

Technology Field

[0001] The present invention relates to a method for detecting errors in a 4-speed transmission, and more specifically, to a method for detecting errors in a 4-speed transmission that confirms the consistency between a gear shift request and a gear shift result, implements fault diagnosis of a shift motor, encoder, and position sensor for shifting within the transmission, and detects the contents occurring during the transmission shifting process and the speed and temperature in the shift maintenance state to take preventive measures against the fault.

[0002] In addition, the present invention relates to a 4-speed transmission error detection method capable of implementing temperature sensor fault diagnosis to eliminate idle noise when the gear is put into neutral due to the driver's unexpected intention while driving, and to prevent damage to transmission parts caused by high temperatures generated within the transmission. Background Technology

[0003] Currently, batteries are used in many places as devices to store electrical energy, and most secondary batteries come in cylindrical, prismatic, or pouch forms. Rechargeable secondary batteries are widely used in devices ranging from portable electronic devices such as smartphones and laptops to drivable electric vehicles. Recently, they are also being used in Energy Storage Systems (ESS) that store and use electricity generated from solar and wind power by connecting multiple battery cells in series or parallel.

[0004] Meanwhile, electric vehicles have recently emerged as an alternative to global warming and environmental pollution, leading to a surge in demand. Consequently, the demand for high-capacity cylindrical battery cells and battery packs capable of connecting them in series or parallel is also on the rise.

[0005] Generally, electric vehicle powertrains utilize a hydraulic transmission system to convert the rotational speed of the drive motor to the desired gear ratio; however, in systems that use a shift motor to change the position of the shift fork, there are cases where additional control adjustments are required by checking the state of the transmission gear moved by the shift motor and determining whether they match the gear shift command.

[0006] When a 4-speed transmission system is in operation, that is, when the gear is in the "D" state, if the gear shifts to neutral ("N" state) due to driver inattention, and the RPM value of the drive motor is higher than the transmission input RPM, it may idle with noise, causing unnecessary motor operation.

[0007] When operating a 4-speed transmission, a large amount of heat is generated inside the transmission. To address this, oil is injected into the transmission to lower the temperature generated inside the transmission. However, if the user uses the accelerator to raise the RPM to the maximum, high temperatures are generated in the transmission. Since prolonged exposure to heat causes deformation of the transmission system, it can lead to a state where the transmission fails. Consequently, a failure in the temperature sensor may result in the inability to detect high temperatures, which can cause damage to the transmission unit.

[0008] In addition, when the transmission system operates normally, the transmission's RPM value is measured using a speed sensor, and the measured RPM data is received by the transmission control unit and transmitted to the vehicle control unit via CAN communication to display the current transmission's driving RPM value on the cluster. However, if the speed sensor installed in the transmission does not operate, it proceeds to a high RPM, which can cause damage to the transmission unit.

[0009] For gear shifting, the transmission control unit receives information regarding gear changes from the vehicle control unit, and the transmission control unit sends motor speed and direction data to the transmission motor driver. The transmission motor operates based on this information, moving the position of the internal gear-changing fork connected to the transmission motor shaft. The transmission gear must then be moved to the normal gear position by the transmission motor driver, but gear shifting may not occur normally due to a failure of the transmission motor driver.

[0010] The gear shifting steps are performed by the movement of a fork within the transmission responsible for gear shifting from 1st to 3rd gear or 2nd to 4th gear. The transmission control unit receives a command from the vehicle control unit and transmits the command to the transmission motor driver, but a malfunction of the vehicle control unit may cause the gear shifting to fail. Prior art literature

[0011] A apparatus for diagnosing communication error between an electronic control unit and a transmission control unit of a vehicle and a method of the same (Patent Publication No. 10-2005-0070593) The problem to be solved

[0012] The present invention was devised to solve the above problems, and its purpose is to provide a 4-speed transmission error detection method that can confirm the consistency between a gear shift request and a gear shift result, implement fault diagnosis of a shift motor, encoder, and position sensor for shifting within the transmission, and detect the contents occurring during the transmission shifting process and the speed and temperature in the shift maintenance state to take preventive measures against failure. means of solving the problem

[0013] The present invention, for achieving the above objective, relates to a 4-speed transmission error detection method comprising a Vehicle Control Unit (VCU), a Transmission Control Unit (TCU), a transmission motor driver, an encoder, a transmission motor, a transmission, a drive motor, and an inverter. When the vehicle's Key-on switch is switched to the On state and the Start selector switch is actuated, an electrical signal is transmitted to the Vehicle Control Unit according to the transmission information signals of P, R, N, and D of the gear drive unit. A driving signal is then transmitted to the Transmission Control Unit (TCU) via CAN communication with the corresponding selection signal. Based on the transmission information, the position of the fork that changes the internal gear of the transmission connected to the transmission motor shaft is moved according to the motor speed information and direction data signals of the transmission motor driver. Consequently, the transmission gear is moved to the normal gear position by the transmission motor driver. A control command is transmitted to the transmission motor driver using a GPIO Port to transmit the selected transmission gear data. The transmission gear information is then compared and detected with the transmission position information transmitted to the position sensor. The result is received and transmitted to the Vehicle Control Unit (VCU), and the corresponding status information is displayed on the cluster. It provides a method for detecting transmission errors.

[0014] In addition, the 4-speed transmission error detection method according to an embodiment of the present invention is characterized by the fact that if the lever information of the gear drive unit and the transmission position are not the same, the information is transmitted to the transmission control unit (TCU), the motor RPM value and the transmission input RPM value are compared, and if the transmission input RPM value is greater, the gear is driven with the corresponding set lever, and if the motor RPM value and the transmission input RPM value are compared, the information is transmitted to the transmission control unit (TCU), and in accordance with the request of the transmission control unit (TCU), the controller register address of the position sensor is read to check the selected gear shift state through the position sensor, and the gear shift state is compared using the gear shift command of the VCU and the transmission position signal confirmed in the T / M (70), and the driving motor is driven and the gear shift is operated.

[0015] In addition, the 4-speed transmission error detection method according to an embodiment of the present invention is characterized by operating such that when the lever of the gear drive unit becomes neutral (N) as the vehicle drives, the Motor RPM value and the input RPM value of the transmission are compared, and if the input RPM value of the transmission is greater, the corresponding neutral state is maintained, and if the Motor RPM value and the input RPM value of the transmission are compared, the corresponding information is transmitted to the transmission control unit (TCU), and when idle noise occurs, the vehicle control unit (VCU) transmits a command to the drive motor to set the motor rotation torque value to "0" so that a fault is detected. Effects of the invention

[0016] The 4-speed transmission error detection method according to the present invention can confirm the consistency between a gear shift request and a gear shift result and implement fault diagnosis of a shift motor, encoder, and position sensor for shifting within the transmission, and provides the effect of detecting the contents occurring during the transmission shifting process and the speed and temperature in the shift maintenance state to take preventive measures against failure.

[0017] In addition, a four-speed transmission error detection method according to another embodiment of the present invention can eliminate idle noise when the gear is put into neutral due to an unexpected intention of the driver while driving, and can implement temperature sensor fault diagnosis to prevent damage to transmission parts caused by high temperature generation within the transmission.

[0018] In addition, the 4-speed transmission error detection method according to an embodiment of the present invention measures the speed through a speed sensor installed in the transmission to check whether speed balancing between the transmission and the drive motor is being performed well, and checks the RPM value of the drive motor using CAN data containing RPM information output from a motor controller included in the inverter, and compares the output value of the speed sensor in the transmission with the RPM output value of the motor controller in the inverter, so that if the transmission output RPM value is not obtained, it can be diagnosed that the speed sensor of the transmission is faulty.

[0019] In addition, the 4-speed transmission error detection method according to an embodiment of the present invention is composed of an encoder capable of checking the rotational state of a transmission motor linked with a transmission motor driver and a transmission motor capable of moving the position of a gear shifting fork responsible for gear shifting, and can diagnose and detect faults occurring during the process of shifting gears according to selected gear information (selected gear state among P, R, N, D) transmitted via CAN communication from a transmission control unit (TCU).

[0020] In addition, the 4-speed transmission error detection method according to an embodiment of the present invention includes a 4-speed transmission equipped with two shift forks for verifying the position of the transmission and an inverter with a built-in motor controller capable of driving and controlling the drive motor, and can diagnose and detect faults occurring during the process of driving the drive motor and controlling the transmission gear.

[0021] In addition, the 4-speed transmission error detection method according to an embodiment of the present invention checks the selected gear state among P, R, N, and D of the transmission gear, and the vehicle control unit (VCU) outputs a gear shift value, and the transmission control unit (TCU) checks the selected gear shift state through the position sensor by reading the controller register address value of the position sensor, and compares the shift state using the gear shift command of the vehicle control unit (VCU) and the transmission position signal confirmed in the transmission to detect and confirm a fault that may occur in the transmission control system. Brief explanation of the drawing

[0022] FIG. 1 is an internal configuration diagram of a 4-speed transmission error detection according to the present invention. FIG. 2 is a flowchart illustrating a 4-speed transmission error detection procedure according to FIG. 1. Specific details for implementing the invention

[0023] Hereinafter, a detailed description of preferred embodiments of the present invention will be given with reference to the accompanying drawings. In describing the present invention below, if it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the essence of the present invention, such detailed description will be omitted.

[0024] FIG. 1 is an operational configuration diagram of a vehicle interior for 4-speed transmission error detection according to the present invention, and FIG. 2 shows a flowchart illustrating the 4-speed transmission error detection procedure according to FIG. 1. For 4-speed transmission error detection according to the present invention, a gear drive unit (10), a Vehicle Control Unit (VCU) (20), a Transmission Control Unit (TCU) (30), a transmission motor driver (40), an encoder (50), a transmission motor (60), and a transmission T / M ) It consists of (70), position sensor (71), speed sensor (73), temperature sensor (75), drive motor (80), inverter (90) and cluster.

[0025] Hereinafter, with reference to the attached FIGS. 1 and 2, the detailed configuration and operation for detecting a 4-speed transmission error according to the present invention will be examined. First, the gear drive unit (10) is provided on one side of the driver's seat for driving the vehicle and determines whether the vehicle is driven according to the driver's selection using levers for P (Parking), R (Reverse), N (Neutral), and D (Drive), and the selection signal of the corresponding lever is transmitted to the vehicle control unit (20) so that the control procedure is driven.

[0026] The above vehicle control unit (VCU) (20) receives the selection signal via CAN communication when an electrical signal is generated according to the transmission information signals of P, R, N, and D of the gear drive unit (10) when the vehicle's Key on switch is switched to the On state and the Start switch is driven, and transmits the driving signal to the transmission control unit (TCU) (30), and controls the overall operation of the vehicle so that the transmission information is displayed on the cluster.

[0027] Additionally, the vehicle control unit (VCU) (20) receives a shift selection signal from the gear drive unit (20) and transmits it to the shift control unit (TCU) (30), and controls the shifting procedure so that the position of the fork connected to the shaft is moved according to the motor speed information and direction data signal of the shift motor driver (40) regarding the shift information, thereby allowing the shifting procedure to proceed to the transmission (70) for the gear change procedure.

[0028] The transmission control unit (TCU) (30) checks the CAN ID of the CAN data according to the transmission signal of the vehicle control unit (VCU) (20), receives a gear shift state of one of P, R, N, or D according to the information of the gear drive unit (10), transmits the selected transmission gear data to the transmission motor driver (40) using a GPIO Port to transmit a control command, compares the transmission gear information with the transmission position information transmitted to the position sensor (71) to detect the result, receives the result value, and transmits it to the vehicle control unit (VCU) (20) so that the corresponding status information is displayed on the cluster.

[0029] Meanwhile, if the gear shift position information of the position sensor (71) and the comparison value are inconsistent, an error is transmitted to the vehicle control unit (VCU) (20) so that the corresponding ERROR value is displayed on the cluster.

[0030] Accordingly, the vehicle control unit (VCU) outputs a gear shift value, and the transmission control unit (TCU) (30) checks the selected gear shift state through the position sensor (71) by reading the controller register address value of the position sensor (71) and comparing the gear shift state using the gear shift command of the vehicle control unit (VCU) and the transmission position signal confirmed from the transmission (70) to detect and confirm a fault that may occur in the transmission control system.

[0031] The above-mentioned transmission motor driver (40) receives a corresponding selection signal for gear change from the transmission control unit (TCU) (30) according to the control signal of the vehicle control unit (VCU) (20) in accordance with the gear change selection signal of the gear drive unit (10), receives motor speed information and direction data conversion information according to the gear change information, and causes the corresponding gear change procedure to proceed through the transmission (70).

[0032] The encoder (50) responds to the corresponding request signal of the transmission control unit (TCU) (30) in response to the transmission selection signal of the gear drive unit (10) and the request for gear change of the vehicle control unit (VCU) (20), checks the rotational state of the transmission motor (60) linked to the transmission motor driver (40), and transmits the corresponding rotational state information.

[0033] The above-mentioned transmission motor (60) moves the position of the fork connected to the shaft according to the motor speed information and direction data signal of the transmission motor driver (40) in response to the transmission information transmitted to the transmission control unit (TCU) (30) through the vehicle control unit (VCU) (20) in accordance with the transmission selection signal of the gear drive unit, and proceeds with the gear change procedure according to the transmission (70).

[0034] That is, a fault can be diagnosed and detected during the process of shifting gears according to the gear selection signal among P, R, N, D of the selected gear information unit (20) transmitted via CAN communication from the transmission control unit (TCU) (30), depending on the operation of the transmission motor (60) which can move the position of the gear shift fork responsible for gear shifting and the encoder (50) which can check the rotational state of the transmission motor (60) linked with the transmission motor driver (40).

[0035] The above transmission (T / M) (70) transmits information regarding gear change from the transmission control unit (TCU) (30) to the transmission motor driver (40) in accordance with the control signal of the vehicle control unit (VCU) (20), including motor speed information and direction data, so that the transmission motor (60) is connected to the shaft to change the position of the fork for gear change based on the information, and operates so that gear change is performed by the transmission motor driver (40).

[0036] The above transmission (70) receives information regarding gear change from the transmission control unit (TCU) (30) via the vehicle control unit (VCU) (20) for gear shifting, and the transmission control unit (TCU) (30) sends motor speed information and direction data to the transmission motor driver (40). The transmission motor (60) operates based on this information, moves the position of the fork that performs internal gear change within the transmission (70) connected to the shaft of the transmission motor (60), and operates so that the transmission gear is moved to the normal gear position by the transmission motor driver (40).

[0037] Meanwhile, the above transmission (70) is configured to include a position sensor (71), a speed sensor (73), and a temperature sensor (75). The position sensor (71) detects the position of the shift fork and transmits the current gear position, the speed sensor (73) measures the speed of the transmission (70) and transmits RPM information, and the temperature sensor (75) operates to check the temperature of the oil inside the transmission (70).

[0038] That is, the speed sensor (73) measures the speed to determine whether the speed balancing between the transmission (70) and the drive motor (80) is well performed, and the RPM value of the drive motor (80) is checked using CAN data containing RPM information output from the motor controller included in the inverter (90), and the output value of the speed sensor (73) is compared with the RPM output value of the motor controller in the inverter (90), and if the output RPM value of the transmission (70) is output abnormally, the speed sensor (73) of the transmission (70) determines whether there is an error.

[0039] The above drive motor (80) can implement fault detection so that, in the event that the gear drive unit (20) moves to neutral due to driver inattention while driving, the motor RPM value output from the inverter (90) containing the drive motor controller and the input RPM value of the transmission (70) are compared so that no idle noise is generated due to the current driving RPM value, and if the motor RPM value is greater, the vehicle control unit (VCU) transmits a command to the drive motor (80) to set the motor rotation torque value to 0 so that the noise is not generated for a long time.

[0040] The inverter (90) drives and controls a 4-speed transmission (70) equipped with two shift forks for checking the position of the transmission (70) and a drive motor (80), and can diagnose and detect faults that occur during the process of driving the drive motor (80) and controlling the transmission gear.

[0041] That is, when the gear ratio of the gear drive unit (10) is D, the driving motor RPM value transmitted as a CAN value from the motor controller included in the inverter (90) and the transmission (70) output RPM value are compared to check the condition of the driving motor (80) and the driving rotation RPM value by comparing the current gear ratio (selected gear ratio among 1st, 2nd, 3rd, and 4th gears) and the motor rotation RPM value.

[0042] Additionally, the above-mentioned cluster (not shown in the drawing) is a device that displays key vehicle information so that the driver can easily check it, and is commonly referred to as an instrument panel. It is equipped with an odometer, thermometer, fuel level gauge, speedometer, etc., and provides various information such as speed, engine rotation speed, and fuel level to display vehicle status information so that the driver can check it. In the case of the present invention, according to the operation of the gear drive unit (10), the gear status information on the instrument panel and the selected gear data according to one of the gear shifting states of P, R, N, and D are transmitted to the transmission motor driver (40) via CAN communication using a GPIO Port to transmit a control command, and the gear shifted information is checked and compared with the gear shift position information using a position sensor (71), and when an error message occurs regarding the detected result value, it is received by the vehicle control unit (VCU) and operates to display an ERROR value.

[0043] A four-speed transmission error detection method according to an embodiment of the present invention includes a four-speed transmission (70) equipped with two shift forks for checking the position of the transmission (70) and an inverter (90) with a built-in motor controller capable of driving and controlling the drive motor (80), and operates to diagnose and detect a fault that occurs during the process of driving the drive motor and controlling the transmission gear.

[0044] That is, to detect a 4-speed transmission error, the shift fork for shifting the transmission gear is composed of a shift fork 1 for 1st to 3rd gears and a shift fork 2 for 2nd to 4th gears, and is configured with a position sensor (71) that detects the position of the shift fork and transmits the current gear position, a temperature sensor (75) that can check the temperature of the oil inside the transmission (70), and a speed sensor (73) that measures the speed of the transmission (70) and transmits RPM information, so that the fault condition of the transmission (70) is detected.

[0045] The above configuration of the gear drive unit (10), vehicle control unit (VCU) (20), transmission control unit (TCU) (30), transmission motor driver (40), encoder (50), transmission motor (60), transmission (70), drive motor (80), inverter (90), and cluster is as follows when looking at the attached FIG. 2.

[0046] (1) First, when the vehicle's Key on switch is switched to the ON state and the Start switch is driven, an electric signal is transmitted to the vehicle control unit (20) according to the gear drive unit (10)'s P, R, N, D gear change information signal. When the corresponding selection signal is received via CAN communication and a driving signal is transmitted to the transmission control unit (TCU) (30), the position of the fork that changes the internal gear of the transmission (70) connected to the shaft of the transmission motor (60) is moved according to the motor speed information and direction data signal of the transmission motor driver (40) regarding the gear change information, so that the transmission gear is moved to the normal gear position by the transmission motor driver (40).

[0047] That is, the transmission control unit (TCU) (30) checks the CAN ID of the CAN data according to the transmission signal of the vehicle control unit (VCU) (20) to receive the gear shift status of the gear drive unit (10), transmits the selected transmission gear data to the transmission motor driver (40) using a GPIO Port to transmit a control command, compares the shifted gear information with the transmission position information transmitted to the position sensor (71) to detect the result, receives the result value, and transmits it to the vehicle control unit (VCU) (20) so that the corresponding status information is displayed on the cluster.

[0048] Meanwhile, the system is composed of an encoder (50) capable of checking the rotational state of a transmission motor (60) linked with a transmission motor driver (40) and a transmission motor (60) capable of moving the position of a gear transmission fork responsible for gear shifting, and can diagnose and detect faults occurring during the process of shifting gears according to selected gear information (selected gear state among P, R, N, D) transmitted from the TCU (30) via CAN communication.

[0049] Afterwards, it is determined whether the lever information of the gear drive unit (10) and the transmission position are the same, and if they are in the same position, it operates to be driven according to the corresponding selection lever.

[0050] (2) If the lever information of the gear drive unit (10) and the position of the transmission (70) are not the same, when the corresponding information is received by the transmission control unit (TCU) (30), the motor RPM value and the input RPM value of the transmission (70) are compared, and if the input RPM value of the transmission is greater, the gear is driven to the corresponding set lever.

[0051] Meanwhile, when comparing the motor RPM value with the input RPM value of the transmission (70), if the transmission input RPM value is smaller, the information is transmitted to the transmission control unit (TCU) (30). In response to a request from the transmission control unit (TCU) (30), the controller register address of the position sensor (71) is read to check the selected gear shift state through the position sensor (71). The gear shift state is then compared using the gear shift command of the VCU (20) and the transmission position signal confirmed by the T / M (70), and the driving motor is driven to shift gears.

[0052] Accordingly, the present invention operates such that a vehicle control unit (VCU) that receives a gear change signal sends the gear change details to a transmission control unit (TCU) (30), reads the transmission information detected by the position sensor (71) mounted on the transmission (70) from the register of the position sensor (71) in the transmission control unit (TCU) (30), uses the data as comparison (S5) information, determines whether it is normal or abnormal after comparison (S5) in the transmission control unit (TCU) (30), and transmits the result value as CAN data to the vehicle control unit (VCU) so that it can be verified using CAN data.

[0053] Additionally, the vehicle control unit (VCU) proceeds to the next process if the result of the CAN data sent from the transmission control unit (TCU) (30) is OK, and if it is NG, it sends a command to the inverter (90) containing the motor controller that drives the drive motor (80) to set the torque value, which is a stop signal, to "0" so that the drive motor (80) can stop, and converts the "Error" signal into CAN data and sends it to the Cluster (S3), so that the Cluster (S3) recognizes the signal and displays it on the screen.

[0054] (3) When the lever of the gear drive unit (10) becomes neutral (N) as the vehicle drives, the Motor RPM value and the input RPM value of the transmission (70) are compared, and if the input RPM value of the transmission (70) is greater, the corresponding neutral state is maintained.

[0055] Meanwhile, when comparing the motor RPM value with the input RPM value of the transmission (70), if the transmission input RPM value is smaller, the information is transmitted to the transmission control unit (TCU) (30) so that no idle noise occurs, and the vehicle control unit (VCU) transmits a command to the drive motor (80) to set the motor rotation torque value to "0" so that a fault is detected.

[0056] (4) Afterwards, when the lever of the gear drive unit (10) is driven, i.e., changed to D1, D2, D3, D4 depending on the vehicle's driving, the Motor RPM value and the input RPM value of the transmission (70) are compared, and if the input RPM value of the transmission is greater, the corresponding set driving state is maintained and operated.

[0057] Meanwhile, when comparing the Motor RPM value with the input RPM value of the transmission (70), if the transmission input RPM value is smaller, the information is transmitted to the transmission control unit (TCU) (30) to compare the driving motor RPM value transmitted as a CAN value in the motor controller included in the inverter (90) with the output RPM value of the transmission (70), and the consistency between the selected gear ratio among 1st, 2nd, 3rd, and 4th gears and the motor rotation RPM value is compared to check the state between the driving motor (80) and the transmission (70).

[0058] (5) Afterwards, the transmission control unit (TCU) (30) is programmed to receive the value measured by the temperature sensor (75) to determine whether the oil used to cool the high heat generated in the transmission (70) is exceeding the normal temperature value, thereby maintaining the appropriate temperature of the transmission (70) to prevent damage to parts and to diagnose a failure of the temperature sensor (75) in the event that the temperature sensor (75) itself signal is not received.

[0059] That is, when operating the 4-speed transmission, a lot of heat is generated inside the transmission (70). Oil is injected into the transmission (70) to lower the temperature generated inside the transmission (70). However, when the user uses the accelerator to raise the RPM to the maximum, high heat is generated in the transmission (70), and deformation of the transmission system due to heat for a long time occurs, which can lead to a failure of the transmission (70). Since the oil temperature sensor (75) fails to detect high heat, it can cause damage to the transmission part, but this can be resolved.

[0060] (6) Afterwards, it is checked whether the speed sensor output is being received. This is done by measuring the speed through the speed sensor (73) installed in the transmission (70) to check whether the speed balance between the transmission (70) and the drive motor (80) is being properly maintained. The RPM value of the drive motor (80) is checked using CAN data containing RPM information output from the motor controller included in the inverter (90). By comparing the output value of the speed sensor (73) in the transmission (70) with the RPM output value of the motor controller in the inverter (90), it is possible to check whether the output RPM value of the transmission (70) is correct and diagnose whether there is an abnormality in the speed sensor (73) in the transmission (70).

[0061] That is, regarding the failure of the speed sensor (73) that checks and transmits the rotational RPM value of the transmission (70), if the driving motor RPM value and the speed sensor (73) measured RPM value are different, or if the speed sensor (73) measured value is not confirmed by the transmission control unit (TCU) (30), the system is programmed to display a warning message on the monitor of the cluster (S2) so that a failure diagnosis of the speed sensor (73) is performed.

[0062] Accordingly, the gear shift information transmitted from the transmission control unit (TCU) (30) and the position information of the transmission position sensor (71) set in the transmission (70) are received and compared and determined whether they are the same as the designated transmission gear number, and according to the result, a fault diagnosis can be performed on the transmission motor driver (40) and the transmission motor (60) for shifting the gear.

[0063] In addition, the present invention checks the selected gear state among P, R, N, and D of the transmission gear, and the vehicle control unit (VCU) outputs a gear shift value. The transmission control unit (TCU) (30) checks the selected gear shift state through the position sensor (71), reads the controller register address value of the position sensor (71), and compares the gear shift state using the gear shift command of the vehicle control unit (VCU) and the transmission position signal confirmed from the transmission (70) to detect and confirm a fault that may occur in the transmission control system. Explanation of the symbols

[0064] 10 : Gear drive unit (P, R, N, D) 20 : Vehicle Control Unit (VCU) 30 : Transmission Control Unit (TCU) 40 : Variable speed motor driver 50 : Encoder 60 : Variable speed motor 70 : Transmission (T / M) 71: Position sensor 73 : Speed ​​sensor 75 : Drive sensor 80 : Drive motor 90: Inverter

Claims

Claim 1 It is composed of a vehicle control unit (VCU) (20), a transmission control unit (TCU) (30), a transmission motor driver (40), an encoder (50), a transmission motor (60), a transmission (70), a drive motor (80), and an inverter (90). When the vehicle's Key on switch is switched to the ON state and the Start switch is driven, an electrical signal is transmitted to the vehicle control unit (20) according to the transmission information signals of P, R, N, and D of the gear drive unit (10). Then, a driving signal is transmitted to the transmission control unit (TCU) (30) via CAN communication with the corresponding selection signal. Based on the transmission information, the position of the fork that changes the internal gear of the transmission (70) connected to the shaft of the transmission motor (60) is moved according to the motor speed information and direction data signals of the transmission motor driver (40). Consequently, the transmission gear is moved to the normal gear position by the transmission motor driver (40), and the selected transmission gear data is transmitted to the transmission motor driver (40) via a control command using a GPIO Port to transmit the shifted gear information. In a method for detecting errors in a 4-speed transmission, wherein the gear position information transmitted to the position sensor (71) is compared and detected, the result is received and transmitted to the vehicle control unit (VCU) (20) to display the corresponding status information on the cluster, if the lever information of the gear drive unit (10) and the position of the transmission (70) are not the same, the corresponding information is transmitted to the transmission control unit (TCU) (30), and the Motor RPM value and the input RPM value of the transmission (70) are compared, and if the transmission input RPM value is greater, the transmission is driven with the corresponding set lever, and if the Motor RPM value and the transmission input RPM value are compared and the transmission input RPM value is smaller,A 4-speed transmission error detection method characterized by transmitting the information to a transmission control unit (TCU) (30), reading the controller register address of the position sensor (71) to check the selected gear shift state via the position sensor (71) in response to a request from the transmission control unit (TCU) (30), comparing the shift state using the gear shift command of the vehicle control unit (VCU) (20) and the transmission position signal confirmed in the T / M (70), and driving the drive motor to shift gears. Claim 2 delete Claim 3 A 4-speed transmission error detection method according to claim 1, characterized in that when the lever of the gear drive unit (10) becomes neutral (N) according to vehicle driving, the Motor RPM value and the input RPM value of the transmission (70) are compared, and if the input RPM value of the transmission (70) is greater, the corresponding neutral state is maintained, and if the Motor RPM value and the input RPM value of the transmission (70) are compared and the input RPM value of the transmission is smaller, the corresponding information is transmitted to the transmission control unit (TCU) (30) so that idle noise occurs and the vehicle control unit (VCU) transmits a command to the drive motor (80) to set the motor rotation torque value to "0" so that a fault is detected. Claim 4 A 4-speed transmission error detection method according to claim 3, wherein when the lever of the gear drive unit (10) is changed to drive, i.e., D1, D2, D3, D4 according to vehicle driving, the Motor RPM value and the input RPM value of the transmission (70) are compared, and if the input RPM value of the transmission is greater, the corresponding set drive state is maintained and operated, and if the input RPM value of the transmission is smaller than the Motor RPM value and the input RPM value of the transmission (70) is compared, the information is transmitted to the transmission control unit (TCU) (30), and the drive motor RPM value transmitted as a CAN value from the motor controller included in the inverter (90) and the output RPM value of the transmission (70) are compared to check the state between the drive motor (80) and the drive rotation RPM value of the transmission (70) by comparing the match between the selected gear ratio among the 1st gear (D1), 2nd gear (D2), 3rd gear (D3), and 4th gear (D4).

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