CN115061699A - Brushing and detecting device and method for TCU of automatic transmission - Google Patents
Brushing and detecting device and method for TCU of automatic transmission Download PDFInfo
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- G06F11/22—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
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Abstract
After the software flashing and checking are finished, a series of detections such as up-down electric circulation detection, CAN communication test, electromagnetic valve current control detection, electric IO interface detection, fault detection, CAN communication closing, characteristic data writing judgment, fault code clearing and the like are carried out on the TCU by calling an electric function detection program, after the electric function detection is qualified, the TCU is considered to be finished, and an operator packs the TCU into a next station. According to the invention, TCUs of the same project can be simultaneously finished with the software flashing of the TCUs and the detection of the electrical functions of the TCUs on the batch flashing and detecting equipment without switching clamps, the flashing efficiency of the TCUs is improved, the detection of the quality of electrical hardware of the TCUs can be finished, the faults of the electrical hardware of the TCUs can be effectively intercepted, and the flashing outgoing quality of the TCUs is improved.
Description
Technical Field
The invention relates to the technical field of TCUs, in particular to a brushing and detecting device and method for a TCU of an automatic transmission.
Background
With the deep integration of the new generation technologies such as artificial intelligence, computers, 5G, internet of things, big data, block chains and the like and the automobile industry, the intellectualization, electromotion and sharing are important characteristics and industrial development trends of the automobile technology evolution, various high-performance electric control units on the vehicle are increasingly important, the batch flash equipment of the traditional automobile automatic transmission controller only considers the software flash quality of the electric control unit at present and neglects the detection of the hardware quality of the electric control unit, so that the software flash success of a TCU (automatic transmission control unit) is easy to occur, but after the TCU is assembled in the automatic transmission, due to the quality defects such as short circuit and false welding of an internal circuit of the TCU or the reasons such as ESD electrostatic discharge and EOS electrical overstress, the chip failure is caused, the partial pin function of the TCU cannot be normally used, and the production detection rhythm of a subsequent automatic transmission offline detection station is influenced, once the TCU with problems is assembled into the market, it will bring great safety quality risk.
Disclosure of Invention
The invention aims to provide a brushing and detecting device and method of a TCU (transmission control unit) of an automatic transmission, aiming at the defects of the prior art, which can quickly brush the TCU and detect the electrical function of the TCU at the same time, can improve the brushing accuracy and improve the hardware electrical quality of the TCU.
The invention has a technical scheme that: the utility model provides an automatic derailleur TCU's brush writes and detection device, includes host computer, industrial computer, frock clamp, industrial computer electrical connection has first scanning rifle, second scanning rifle, still includes signal integrated circuit board, CAN card, the signal integrated circuit board is through industrial computer and host computer electrical connection, and signal integrated circuit board respectively with DC voltage regulator power, load box electrical connection, the CAN card is connected with industrial computer, signal board card respectively through CAN-Bus, set up a plurality of centre gripping stations in the frock clamp for centre gripping TCU, each station of frock clamp is connected with the signal board card through CAN-Bus, makes signal integrated circuit board and TCU carry out data transmission, frock clamp and signal integrated circuit board electrical connection, an air compressor machine is connected with frock clamp for each centre gripping station of control frock clamp presss from both sides tight TCU.
Adopt above-mentioned technical scheme's beneficial effect: the device is provided with a CAN card and a signal board card which are respectively connected with an upper computer through an industrial personal computer, the signal board card is electrically connected with a load box, electric loads such as a real electromagnetic valve are placed in the load box, partial actual working conditions of TCU assembled on a vehicle CAN be simulated through the combination of the load box and the signal board card, the device CAN carry out software flash on the TCU through the CAN card and CAN also carry out electric function detection on the TCU through the signal board card, the TCU of the same model CAN be flash-written and detected in batches through the device, a tool clamp of the TCU does not need to be switched between flash-written and electric function detection, therefore, the flash-written efficiency of the TCU CAN be improved, and the flash-written delivery quality of the TCU CAN be improved. And displaying the brushing and detection results on a screen of the upper computer, and checking the brushing program again to ensure that the brushing program is accurate.
The other technical scheme of the invention is as follows: a brushing and detecting method of an automatic transmission TCU based on a brushing and detecting device comprises the following steps:
s1: configuring a swiping file, a function detection project and a key algorithm for an upper computer, then scanning a serial number of a TCU to be swiped through a first scanning gun, placing the TCU to be swiped into a clamping station of a tool fixture, scanning a station code of the clamping station through the first scanning gun, electrifying the TCU through the upper computer, and starting software to control a CAN card to swipe the TCU;
s2: after the software is written, the upper computer reads the data integrity zone bit of the TCU, the software version number and the software part number fed back from the interior of the TCU through the CAN card, compares and verifies the data integrity zone bit with the program file name, and if the data integrity zone bit, the software version number and the software part number are consistent with the program file name, the software is written successfully;
s3: the upper computer performs upper and lower electric circulation detection on the TCU through the CAN card;
s4: the upper computer performs CAN communication detection on the TCU through a CAN card;
s5: the upper computer performs electromagnetic valve current control detection on the TCU through the CAN card and the signal board card;
s6: the upper computer performs electrical IO interface test on the TCU through the signal board card;
s7: the upper computer sets an initial value of the TCU through the signal board card;
s8: the upper computer detects the fault of the TCU through the CAN card;
s9: the CAN card requests to close the CAN debugging message of offline detection through a UDS protocol, reads the CAN ID of the CAN online debugging message, and if the CAN message cannot be received, the CAN debugging message of offline detection is successfully closed;
s10: the CAN card reads the characteristic data write-in mark through the UDS protocol, and requests to clear the fault code through the UDS protocol, and then power-off of KL15 and power-off of KL30 are sequentially carried out.
Further, the program file name in step S2 is named with the software version number and the software part number to be flashed.
Further, step S3 is to power on and power off the TCU for multiple times during the power on and power off cycle detection, and monitor whether the CAN message counter of the TCU CAN accurately send out a message during multiple power on and power off cycles by the CAN card, if the message is not abnormal, the TCU cycle power on and power off detection is successful, and if the message is abnormal, an alarm is given to prompt and the detection is exited.
Further, in the step S4, in the CAN communication detection process, in the rack test mode, the upper computer controls the CAN card to write a DID command to the TCU through the UDS 2E service to open the offline detection debug message, and detects whether the open function of the debug message is normal, if the debug message CAN be normally opened, the detection is passed, otherwise, the detection is prompted by an alarm and quitted.
Further, in the solenoid valve current control detection process, in step S5, the upper computer controls the CAN card to close the solenoid valve flutter of the TCU through the UDS 2E service, then sequentially sends a current request command to each solenoid valve, executes input and output control using the 2F service of the UDS protocol, requests to control the output current of each solenoid valve, and sends the feedback current value of each solenoid valve collected by the TCU to the upper computer through the DID data reading command of the UDS protocol. Meanwhile, the signal board card is used for acquiring the actual current value of each electromagnetic valve through a current acquisition channel and sending the actual current value to an upper computer, the upper computer compares the feedback current value and the actual current value of each electromagnetic valve with the requested current value, if the error is within an allowable range, the current control detection of the electromagnetic valves is successful, and if the error is not within the allowable range, the detection is failed, and an alarm is given out to prompt and quit the detection.
Further, step S6 is to perform an electrical IO interface test according to the following steps,
1) input interface detection: the upper computer controls the signal board card to output an excitation signal to the TCU, so that the TCU performs self measurement, then the upper computer analyzes and reads feedback data through a CAN message of the TCU, the feedback data is compared with the excitation signal, if the feedback data meets the requirement of the excitation signal, an input interface of the TCU is normal, and otherwise, an alarm is given and the test is quitted;
2) detecting an output interface: the upper computer controls the CAN card to send a control instruction to the TCU through CAN communication, so that a pin corresponding to the TCU outputs a signal to the signal board card, the signal board card sends the acquired signal to the upper computer to be compared with the control instruction sent by the upper computer, if the acquired signal meets the requirement of the control instruction, an output interface of the TCU is normal, and if not, an alarm is given and the test is quit;
further, when the initial value is set in step S7, the initial value is set for each pin channel of the TCU through the signal board, the external environment of the TCU is simulated, the simulated external environment includes that the handle is at the neutral position, the four-way shift fork is at the neutral position, the temperature specified by the oil temperature sensor is at the neutral position, the two-way clutch position sensor is at the disengagement position, and the EMS engine is sent through the CAN channel to be in the idle speed working state, the vehicle is simulated to be stationary under the whole vehicle environment through the setting of the initial value, and the conditions that the handle and the gear are both at the neutral position and the engine is ignited are met, so as to meet the self-checking fault condition of the TCU.
Further, when fault detection is performed in step S8, the CAN card reads the fault code of the TCU through the UDS protocol, and sends the read fault code to the upper computer, and the upper computer compares the received fault code with the electrical fault code stored in advance, and determines whether an electrical fault code related to the circuit of the TCU itself exists, and if so, gives an alarm to prompt and stops detection, and if not, the detection is passed.
Further, the method also includes step S11: and after the function detection of the TCU is completed, taking the TCU down from the tool fixture, scanning the serial number of the TCU by using a second scanning gun, and displaying the brushing and detection results of the TCU through an upper computer.
Adopt above-mentioned technical scheme's beneficial effect: according to the method, software flashing and verification are carried out on the TCU through the CAN card, a series of detections such as up-down electrical cycle detection, CAN communication detection, electromagnetic valve current control detection, electrical IO interface detection, fault detection, CAN communication closing, characteristic data writing judgment, fault code clearing and the like are carried out on the TCU through an electrical function detection program, electrical hardware faults of the TCU CAN be effectively intercepted, and by means of verification error-proofing measures, the efficiency of software refreshing work and the accuracy of software flashing are improved while the TCU CAN realize client functions, so that the flashing factory quality and the hardware electrical quality of the TCU are improved.
The invention is further described with reference to the drawings and the specific embodiments in the following description.
Drawings
FIG. 1 is a schematic structural diagram of a flash and detection device according to the present invention;
FIG. 2 is a flow chart of the flash and detect method of the present invention.
Detailed Description
Referring to fig. 1, an embodiment of automatic transmission TCU's brushing and detection device, including host computer 1, industrial computer 2, frock clamp 5, industrial computer electrical connection has first scanning rifle 7, second scanning rifle 8, and first scanning rifle 7 is used for scanning TCU 6's serial number and the station number of centre gripping station before brushing, carries out the check-up for the first time after being convenient for brush-write, and second scanning rifle 8 is used for scanning TCU 6's serial number after electrical detection, is convenient for carry out the check-up again to TCU's brushing program and electrical detection program. The device is characterized by further comprising a signal board card 4 and a CAN card 3, wherein the signal board card 4 is electrically connected with an upper computer 1 through an industrial personal computer 2, the signal board card 4 is electrically connected with a direct-current stabilized power supply 9 and a load box 10 respectively, a stable power supply is provided for the signal board card 4 through the direct-current stabilized power supply 9 to ensure that the signal board card 4 CAN run stably, the load box 10 CAN simulate the actual loading condition of the TCU, the CAN card is connected with the industrial personal computer 2 and the signal board card 4 through CAN-Bus respectively, a plurality of clamping stations are arranged in the tool clamp 5 and used for clamping the TCU6, the tool clamp 5 of the embodiment is provided with four clamping stations which CAN be used for swiping four TCUs simultaneously, each station of the tool clamp 5 is connected with the signal board card 4 through CAN-Bus to enable the signal board card 4 to carry out data transmission with the TCU6, the signal board card 4 is used for carrying out electrical hardware detection on the TCU6, the upper computer 1 is used for swiping software on the TCU6 through the CAN card 3, and the tooling clamp 5 is electrically connected with the signal board card 4. An air compressor machine 11 is connected with frock clamp 5 for each centre gripping station of control frock clamp 5 presss from both sides tight TCU6, makes frock clamp 5 obtain power through air compressor machine 11 and makes each centre gripping station press from both sides tight TCU 6.
This device CAN carry out the software through CAN card 3 to TCU6 and brush and write, CAN also carry out electrical function detection to TCU6 through signal integrated circuit board 4, CAN brush in batches and write and detect the TCU6 of same model through this device, the frock clamp who need not switch TCU between brushing and the electrical function detection, thereby CAN improve TCU's efficiency of brushing and writing, and improve TCU's the quality of dispatching from the factory of brushing and writing, in addition, this device is equipped with two scanning guns, CAN carry out twice check to the program of brushing and writing, it is accurate to ensure the program of brushing and writing.
Referring to fig. 2, a method for flashing and detecting a TCU of an automatic transmission includes the steps of:
s1: the method comprises the steps of naming a program file to be swiped by adopting a software version number and a software part number, supporting BIN, S19 or HXE in a program format, configuring a swiping file, a function detection project and a key algorithm on an upper computer, scanning a serial number of a TCU to be swiped by a first scanning gun, placing the TCU to be swiped into a clamping station of a tool fixture, scanning a station code of the clamping station by the first scanning gun, ensuring that finally formed swiping records and detection records CAN correspond to bar codes of the TCU one by one, controlling each clamping station of the tool fixture to clamp the TCU by the upper computer, electrifying the TCU by the upper computer, and finally starting software to control a CAN card to swipe and write the TCU.
S2: after the software is written, the upper computer reads the data integrity zone bit of the internal application layer of the TCU through the CAN card, the incomplete data written by the software is avoided, the software version number and the software part number fed back from the internal part of the TCU are read, the software version number and the software part number are compared and checked with the program file name, if the two are consistent, the software is successfully written by the software, if the two are inconsistent, the software exits, the condition that the data written by the software is incomplete or the version written by the software is wrong is avoided, and therefore the quality of the software writing by the software is improved.
S3: the upper computer carries out up-down electric circulation detection on the TCU through the CAN card, and the detection is as follows,
1) the upper computer powers on the TCU for 3 seconds through KL15, powers off the TCU for 3 seconds, and circulates for N times, wherein N can be set in advance through the upper computer;
2) every KL15 is electrified for 2 seconds, the upper computer starts to monitor whether a CAN message counter of the TCU CAN accurately send a message through a CAN card, when a TCU application layer works normally, the CAN message counter CAN use 10ms as a period, values from 0 to 15 are sent in a circulating mode, if the message is not abnormal, the TCU is successfully tested in a circulating power-on and power-off mode, otherwise, as long as the upper computer detects that the message is abnormal once, the TCU CAN be judged to be tested in the power-on and power-off circulating mode to be abnormal, an alarm is given to prompt an operator at the moment, and the detection is quitted.
Whether the situation that the TCU has no response after powering up and powering down in a plurality of cycles due to chip micro-area burnout and the like caused by circuit cold solder joint, ESD/EOS electrical overstress and the like exists in the TCU can be checked through power-up and power-down cycle detection, and a fault part can be prevented from flowing into the market.
S4: the upper computer carries out CAN communication detection on the TCU through the CAN card, and due to the technical secrecy requirement, messages sent out under the normal activation state of the TCU only contain a small amount of important interactive information with other vehicle controllers. And in subsequent detection, comparing the debugging message information with the set value of the upper computer, and judging whether the detection is passed.
S5: the upper computer performs electromagnetic valve current control detection on the TCU through the CAN card and the signal board card, and the detection is as follows,
1) the upper computer controls the CAN card and sends UDS 2E service to close the flutter of the electromagnetic valve of the TCU, so that the TCU is prevented from automatically controlling the current of the electromagnetic valve according to the flutter control logic of the electromagnetic valve, and the inaccuracy of the feedback current received in the detection process is prevented;
2) the upper computer controls the CAN card, and sequentially sends current request commands to the solenoid valves, wherein the current request commands comprise a main piezoelectric solenoid valve, a lubricating solenoid valve, two hydraulic valves and two reversing valves, the request current adopts 500mA, and the feedback current values of the solenoid valves collected by the TCU are sent to the upper computer through a reading DID data command of a UDS protocol, and the upper computer judges whether the difference value between the request current and the feedback current values is within an error allowable range;
3) the signal board cartoon current acquisition channel acquires the actual output current of the electromagnetic valve within a certain time and sends the actual output current to the upper computer, the upper computer calculates the average value of the acquired actual output current of each electromagnetic valve and judges whether the difference value between the request current of each electromagnetic valve and the average value of the actual output current is within an error allowable range or not;
4) if the difference between the request current and the feedback current value and the difference between the request current and the average value of the actual output current are both within an error range, the error allowable range of the embodiment is 490mA-510mA, the solenoid valve current control detection is successful, otherwise, the detection is failed, and an alarm is given out to prompt and quit the detection. Through the two judgments, the normal work of each electromagnetic valve channel is ensured.
S6: the upper computer performs an electrical IO interface test on the TCU through the signal board card, and the specific detection is as follows,
1) input interface detection: the upper computer controls the signal board card to output an excitation signal to the TCU, so that the TCU performs self measurement, then the upper computer analyzes and reads feedback data through a CAN message of the TCU, the feedback data is compared with the excitation signal, if the feedback data meets the requirement of the excitation signal, an input interface of the TCU is normal, and otherwise, an alarm is given and the test is quitted;
2) detecting an output interface: the upper computer controls the CAN card to send a control instruction to the TCU through CAN communication, so that a pin corresponding to the TCU outputs a signal to the signal board card, the signal board card sends the acquired signal to the upper computer, the signal is compared with the control instruction sent by the upper computer, if the acquired signal meets the requirement of the control instruction, an output interface of the TCU is normal, and if not, an alarm is given and the test is quitted.
In this embodiment, the detecting content includes:
firstly, detecting the electrified static working current, and detecting whether the static current of the electrified TCU exceeds a limit value, such as 0.5A, through a current acquisition channel of a signal board card, thereby judging whether the hardware of the TCU has an internal abnormal short circuit.
Voltage input signal detection modes such as 4-path shifting fork position sensors, PRND handle position sensors, 2-path clutch pressure sensors and the like are as follows: setting each analog voltage signal by a D/A digital-to-analog channel of an upper computer control signal board card, then measuring by a TCU (train control unit), analyzing and reading data by the upper computer through a CAN (controller area network) message of the TCU, finally comparing and judging the read data with output data set by the upper computer, and if the deviation is within +/-5%, judging the TCU to be qualified so as to judge whether each analog voltage input interface of the TCU CAN normally work.
The handle adds and subtracts shelves signal Tip +, Tip-, the manual automatic transfer switch of handle, digital switch input signal detection modes such as economy and motion mode change over switch: the digital switch channel of the upper computer control signal board card is provided with each analog voltage signal, then the TCU measures itself, the upper computer analyzes and reads data through the CAN message of the TCU, and finally the read data is compared and judged with the data output by the upper computer, so as to judge whether each digital switch input interface of the TCU CAN work normally.
And 2, detecting frequency signals of the speed sensor of the input shaft in an equal way: the upper computer controls a PWM frequency signal channel of the signal board card, an excitation signal is input to the TCU, then the TCU measures itself, then the upper computer reads data through CAN message analysis of the TCU, and finally the read data is compared and judged with data output by the upper computer, and the deviation is within +/-5%, so that the TCU is qualified and used for judging whether each frequency input interface of the TCU CAN work normally.
And (6) a detection mode of 8V power supply equal voltage output signals of the 2-path sensor: the upper computer carries out voltage acquisition on the TCU 8V power supply channel through the signal board card, compares and judges the acquired voltage value with a set value (such as 8V) of the upper computer, and is qualified if the deviation of the acquired value and the set voltage value is within +/-5%.
Sixthly, the detection mode of the output signals of the digital switches such as the switching relay is as follows: the upper computer sends a switch relay control instruction to the TCU through CAN communication, controls the switch relay pin output of the TCU, acquires the digital switch state through the signal board card digital switch channel, and finally compares and judges the digital switch state acquired by the signal board card with the set value of the upper computer to judge whether each digital switch output interface of the TCU CAN work normally.
And seventhly, setting a resistance value by simulating a negative temperature coefficient resistance sensor such as a 2-path oil temperature sensor through a resistance channel of the signal board card, detecting whether the resistance channel corresponding to the TCU is normal or not through a feedback value of the TCU, and if the deviation of the feedback value and the set resistance value is within +/-5%, determining that the resistance value is qualified.
In addition, in order to avoid the situation that the TCU cannot be intercepted due to channel faults and the fault value is exactly equal to the sample set value in the single sample test, the input and output signal detection requires that a plurality of sampling points in the normal working state are taken for testing, for example, each path of shifting fork position sensor can be set with 3 sampling points such as 1000mv, 2500mv and 4000mv for testing, and the testing accuracy is ensured.
S7: the upper computer carries out initial value setting to TCU through the signal integrated circuit board, and the signal integrated circuit board sets up specific voltage for each pin passageway of TCU, and the simulation TCU external environment is in the neutral gear including the simulation handle position, and the simulation four ways shift fork position is in the neutral gear, and the simulation oil temperature sensor is at specific temperature, and the simulation two ways clutch position sensor is in clutch off position. The upper computer simulates the rotation speed of an EMS engine to be in an idle speed working state through a CAN card, simulates the condition that a vehicle is in a static state under the whole vehicle environment through setting an initial value, a handle and a gear are in neutral, and the engine ignites to meet the condition of TCU self-checking faults.
S8: the upper computer carries out fault detection on the TCU through the CAN card, the CAN card reads a fault code of the TCU through a UDS protocol $19 service and sends the read fault code to the upper computer, the upper computer compares the received fault code with a prestored electrical fault code and judges whether an electrical fault code related to a circuit of the TCU exists or not, if the electrical fault code exists, an alarm is given out and detection is stopped, if the electrical fault code does not exist, detection is passed, the conditions that the internal chip fault of the TCU judged by the TCU self-checking and each electrical pin short circuit a power supply, short circuit to the ground, open circuit faults and the like CAN be automatically intercepted through fault detection, and the prestored electrical fault code in the upper computer CAN be manually updated to increase and decrease.
S9: and (4) in order to ensure that the CAN debugging message of offline detection keeps a closed state after TCU (trusted peripheral Unit) flashing and electrical function detection due to technical secrecy requirements, firstly, a CAN card requests to close the CAN debugging message of offline detection through a UDS (Universal data System) protocol, then, the CAN ID (controller area network ID) of the CAN online debugging message is read, if the CAN message cannot be received, the CAN debugging message of offline detection is successfully closed, and otherwise, the CAN debugging message is alarmed and quitted from detection.
S10: the method comprises the steps that characteristic data are written in, and a fault code is judged and cleared, firstly, a CAN card reads a characteristic data writing mark through a UDS protocol, the characteristic data in a TCU are ensured to be in a default value state, namely, the TCU is not written in through offline characteristic data, then the fault code is cleared through a request of the UDS protocol, the condition that no fault code exists in the TCU after the TCU is written by brush and the electrical function detection is finished is ensured, the consistency of the factory state of the TCU CAN be ensured through the two detections, and the condition inconsistency of the TCU is prevented from influencing the operation of a subsequent offline detection station. And finally, the power-off sequence of the TCU is ensured to be correct, the KL15 is powered off firstly, and then the KL30 is powered off, so that EOS electrical overstress caused by live plugging and unplugging is avoided, a micro-area of a controller chip is burnt, and the TCU is damaged.
S11: accomplish TCU's function detection back, loosen TCU through air compressor machine control frock clamp, take off TCU from frock clamp, before TCU vanning, use the serial number of second scanning rifle scanning TCU, flash and the testing result of TCU is shown through the host computer, the software version number and the software part number of flash, and information display such as the time of flash is on the host computer screen, this step can detect whether this TCU flashes or detects, prevent that it from obscuring with the TCU that does not flash or not detect.
Claims (10)
1. A brushing and detecting device of an automatic transmission TCU is characterized in that: including host computer, industrial computer, frock clamp, industrial computer electrical connection has first scanning rifle, second scanning rifle, still includes signal integrated circuit board, CAN card, the signal integrated circuit board is connected with the host computer electrical connection through the industrial computer, and the signal integrated circuit board respectively with DC voltage regulator power, load box electrical connection, the CAN card is connected with industrial computer, signal board card respectively through CAN-Bus, set up a plurality of centre gripping stations in the frock clamp for centre gripping TCU, each station of frock clamp is connected with the signal board card through CAN-Bus, makes signal integrated circuit board and TCU carry out data transmission, frock clamp and signal integrated circuit board electrical connection, an air compressor machine and frock clamp are connected for each centre gripping station of control frock clamp presss from both sides tight TCU.
2. A method for flashing and detecting the TCU of an automatic transmission based on the device of claim 1,
s1: configuring a swiping file, a function detection project and a key algorithm for an upper computer, then scanning a serial number of a TCU to be swiped through a first scanning gun, placing the TCU to be swiped into a clamping station of a tool fixture, scanning a station code of the clamping station through the first scanning gun, electrifying the TCU through the upper computer, and starting software to control a CAN card to swipe the TCU;
s2: after the software is written, the upper computer reads the data integrity zone bit of the TCU, the software version number and the software part number fed back from the interior of the TCU through the CAN card, compares and verifies the data integrity zone bit with the program file name, and if the data integrity zone bit, the software version number and the software part number are consistent with the program file name, the software is written successfully;
s3: the upper computer performs upper and lower electric circulation detection on the TCU through the CAN card;
s4: the upper computer performs CAN communication detection on the TCU through a CAN card;
s5: the upper computer performs electromagnetic valve current control detection on the TCU through the CAN card and the signal board card;
s6: the upper computer performs electrical IO interface test on the TCU through the signal board card;
s7: the upper computer sets an initial value of the TCU through the signal board card;
s8: the upper computer detects the fault of the TCU through the CAN card;
s9: the CAN card requests to close the CAN debugging message of offline detection through a UDS protocol, reads the CAN ID of the CAN online debugging message, and if the CAN message cannot be received, the CAN debugging message of offline detection is successfully closed;
s10: the CAN card reads the characteristic data write-in mark through the UDS protocol, and requests to clear the fault code through the UDS protocol, and then power-off of KL15 and power-off of KL30 are sequentially carried out.
3. The flash and detection method of an automatic transmission TCU of claim 2, wherein: the program file name in step S2 is named with the software version number and the software part number to be flashed.
4. The flash and detection method of an automatic transmission TCU of claim 2, wherein: step S3, in the process of power-on and power-off circulation detection, the TCU is powered on and off for a plurality of times, the CAN card monitors whether the CAN message counter of the TCU CAN accurately send out messages in the process of power-on and power-off circulation for a plurality of times, if the messages are not abnormal, the TCU is successfully tested by power-on and power-off circulation, and if the messages are abnormal, the TCU gives an alarm to prompt and quit the test.
5. The flash and detection method of an automatic transmission TCU according to claim 2, characterized in that: step S4, in the process of CAN communication detection, in the bench test mode, the upper computer controls the CAN card to write DID commands into the TCU through UDS 2E service to open the off-line detection debugging message, and detects whether the opening function of the debugging message is normal, if the debugging message CAN be normally opened, the detection is passed, otherwise, the detection is given an alarm to prompt and quit.
6. The flash and detection method of an automatic transmission TCU of claim 2, wherein: step S5, in the process of solenoid valve current control detection, the upper computer controls the CAN card to close the solenoid valve flutter of the TCU through UDS 2E service, then sends current request commands to each solenoid valve in sequence, uses 2F service of UDS protocol to execute input and output control, requests to control the output current of each solenoid valve, and reads DID data command through UDS protocol, sends the feedback current value of each solenoid valve collected by the TCU to the upper computer, meanwhile, the signal board card overcurrent collection channel collects the actual current value of each solenoid valve and sends the actual current value to the upper computer, the upper computer compares the feedback current value, the actual current value and the request current value of each solenoid valve, if the error is in the allowable range, the solenoid valve current control detection is successful, otherwise, the detection fails, and alarms and exits the detection.
7. The flash and detection method of an automatic transmission TCU of claim 2, wherein: step S6 performs an electrical IO interface test as follows,
1) input interface detection: the upper computer controls the signal board card to output an excitation signal to the TCU, so that the TCU performs self measurement, then the upper computer analyzes and reads feedback data through a CAN message of the TCU, the feedback data is compared with the excitation signal, if the feedback data meets the requirement of the excitation signal, an input interface of the TCU is normal, and otherwise, an alarm is given and the test is quitted;
2) detecting an output interface: the upper computer controls the CAN card to send a control instruction to the TCU through CAN communication, so that a pin corresponding to the TCU outputs a signal to the signal board card, the signal board card sends the acquired signal to the upper computer, the acquired signal is compared with the control instruction sent by the upper computer, if the acquired signal meets the requirement of the control instruction, an output interface of the TCU is normal, and otherwise, the test is prompted and quitted by alarm.
8. The flash and detection method of an automatic transmission TCU of claim 2, wherein: when the initial values are set in the step S7, the initial values are set for all pin channels of the TCU through the signal board card, the external environment of the TCU is simulated, the simulated external environment comprises that a handle is positioned at a neutral position, a four-way shifting fork is positioned at the neutral position, the temperature specified by an oil temperature sensor is set, two-way clutch position sensors are positioned at a disengaging position, an EMS engine is sent through a CAN channel to be in an idling working state, the conditions that the vehicle is static under the whole vehicle environment, the handle and the gears are both in the neutral position and the engine is ignited are simulated through the initial values.
9. The flash and detection method of an automatic transmission TCU of claim 2, wherein: when the fault detection is carried out in the step S8, the CAN card reads the fault code of the TCU through the UDS protocol and sends the read fault code to the upper computer, the upper computer compares the received fault code with the pre-stored electrical fault code and judges whether the electrical fault code related to the circuit of the TCU exists or not, if so, the upper computer gives an alarm to prompt and stops the detection, and if not, the detection is passed.
10. The flash and detection method of an automatic transmission TCU of claim 2, wherein: further comprising step S11: and after the function detection of the TCU is completed, taking the TCU down from the tool fixture, scanning the serial number of the TCU by using a second scanning gun, and displaying the brushing and detection results of the TCU through an upper computer.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116300834A (en) * | 2023-05-19 | 2023-06-23 | 合肥荣叙科技有限公司 | Water pump motor controller test system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116300834A (en) * | 2023-05-19 | 2023-06-23 | 合肥荣叙科技有限公司 | Water pump motor controller test system |
| CN116300834B (en) * | 2023-05-19 | 2023-08-08 | 合肥荣叙科技有限公司 | Water pump motor controller test system |
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