Engine electric control system and oil way nondestructive maintenance practical training device

Abstract

The utility model discloses an engine electric control system and oil path nondestructive maintenance practical training device, which relates to the technical field of engine maintenance, and comprises an ECU circuit detection unit and a fuel oil high pressure and low pressure detection unit, the ECU circuit detection unit comprises an ECU X1 end whole vehicle side connection terminal detection box and an ECU X2 end engine side connection terminal detection box; the ECU X1 end whole vehicle side connection terminal detection box is used for detecting a whole vehicle input end signal and displaying a whole vehicle output end load; the ECU X2 end engine side connection terminal detection box is used for detecting an engine input end signal and displaying an engine output end load; the fuel oil high-pressure and low-pressure detection unit is used for accurately metering a fuel oil return path of the engine and conveniently disassembling, assembling and detecting a high-pressure oil path and a low-pressure oil path of the engine; according to the utility model, lossless maintenance of the whole vehicle, rapid and accurate maintenance, quantitative display of input signals, visualization of output signals and convenience of oil path detection can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of engine overhaul, in particular to an engine electronic control system and an oil circuit non-destructive overhaul training device. Background Art

[0002] The existing WP13.605 engine has the characteristics of complex structure, numerous electronic control circuits, and difficult fault inspection and location, which places high demands on the inspection and maintenance capabilities of special equipment maintenance personnel. At present, almost all maintenance workers often use three methods when testing electronic control engines: line damage measurement, needle contact detection, and connector withdrawal detection. These three detection methods have certain safety operation hazards, and the detection process will cause more or less insulation damage to the original vehicle circuit, making the waterproof effect of the wiring harness worse and the contact resistance increased, which will cause great safety hazards for the use of the vehicle wiring harness in the later stage, and it is easy to cause other problems such as open circuit, short circuit, and virtual connection.

[0003] When repairing engine oil circuit failures, the high and low pressure oil pipelines are complex, with many filters and valves. The oil pressure at each position will have different pressure values ​​under different working conditions. When repairing such failures, maintenance workers do not have corresponding accurate data as maintenance standards, and they mostly rely on experience and feelings to repair. The repair efficiency is not high, there are no instruments for digital display, and the degree of standardization is low. Utility Model Content

[0004] The WP13.605 engine electronic control system and oil circuit non-destructive maintenance training device is a device specially designed for the maintenance of the WP13.605 engine electronic control system and high and low pressure oil circuits. It can realize functions such as non-destructive transfer detection of electronic control circuits, signal simulation injection, output load simulation and oil circuit data display.

[0005] This training device fills the gap of engine electronic control maintenance circuit damage detection and engine low-pressure oil circuit, high-pressure oil circuit fault repair personnel without data standards and special testing instruments. The whole set of equipment is equipped with a fault code analysis and troubleshooting manual, which can help maintenance personnel quickly locate the fault point and accurately eliminate the fault. This training device can be used for teaching principle demonstration, electronic control engine sensor signal simulation training, electronic control vehicle circuit non-destructive testing, fault diagnosis and maintenance and other application occasions.

[0006] Specifically, the technical solution adopted by the utility model is: an engine electronic control system and oil circuit non-destructive maintenance training device, including an ECU circuit detection unit and a fuel high-pressure and low-pressure detection unit, and the ECU circuit detection unit includes an ECUX1 end vehicle side connection terminal detection box and an ECUX2 end engine side connection terminal detection box.

[0007] The vehicle-side connection terminal detection box at the ECU X1 end is used for vehicle input signal detection and vehicle output load display; the engine-side connection terminal detection box at the ECU X2 end is used for engine vehicle input signal detection and engine output load display; the output signal of the original ECU can be visually displayed in the inspection box, and the multi-channel sensor signal of the original vehicle can be simulated and replaced. The signal input channel is selected through the conversion switch, and the input signal is quantified by a digital instrument or oscilloscope, and the signal size and waveform of the online vehicle-mounted sensor can be displayed in real time.

[0008] The fuel high-pressure and low-pressure detection unit is used for accurate measurement of the engine fuel return oil circuit and convenient disassembly and detection of the engine high- and low-pressure oil circuits; it can accurately determine the working condition of the oil circuit and quickly determine the location of the oil circuit blockage.

[0009] Furthermore, the fuel high-pressure and low-pressure detection unit includes a high-pressure oil circuit detection pipeline, a low-pressure oil circuit detection pipeline, a tee, an oil hole screw and a high-pressure and low-pressure pointer-type oil gauge head.

[0010] Furthermore, the ECU X1-side vehicle-side connection terminal detection box includes a box body 1 for support, and a panel of the box body 1 is provided with component openings for display and interactive detection.

[0011] Furthermore, a double-sided PCB board 1 for inputting and outputting signals is installed at the rear of the box body 1, and a plurality of components for detection are connected inside the PCB board 1. Three standard double-row 2.54-pitch male pin sockets are arranged on the PCB board 1 at the rear of the box body 1, and the pins of the three sockets correspond one-to-one to the pins of the electronic control ECU, and a total of 76 corresponding test jacks are installed on the maintenance box panel.

[0012] Furthermore, the socket and the detection socket of the PCB board are connected correspondingly with standard cables, and all signal detections are carried out without causing any damage to the original vehicle lines. Terminal plugs and sockets are designed specifically for the whole vehicle, and they are directly plugged in and unplugged. A dedicated whole vehicle terminal test area is designed, which corresponds one by one to the pins of the electronic control ECU socket, so that all terminals can be quickly and accurately detected directly on the maintenance box.

[0013] Furthermore, the ECU X2-end engine-side connection terminal detection box includes a second box body for support, and a panel of the second box body is provided with component openings for display and detection.

[0014] Furthermore, a double-sided PCB board 2 for inputting and outputting signals is installed at the rear of the second box body, and a plurality of components for detection are connected inside the second PCB board. Three standard double-row 2.54-pitch male pin sockets are arranged on the second PCB board at the rear of the second box body, and the pins of the three sockets correspond one-to-one to the pins of the electronic control ECU, and a total of 76 corresponding test jacks are installed on the panel of the second box body.

[0015] Furthermore, the socket and the detection socket of the PCB board 2 are connected correspondingly with standard cables; terminal plugs and sockets specially designed for the engine are directly plugged in and out; a dedicated engine terminal test area is designed, which corresponds one by one to the pins of the electronic control ECU socket, so that all terminals can be quickly and accurately detected directly on the maintenance box.

[0016] Furthermore, the maintenance training device includes two maintenance modes, the first maintenance mode is online detection; the second maintenance mode is offline detection.

[0017] Furthermore, the maintenance training device is equipped with an in-box electrical detection package for quickly determining the circuit working condition and line conduction state.

[0018] Compared with the prior art, the utility model has the following beneficial effects: (1) the utility model can complete the non-destructive detection of all node terminals of the WP13.605 electronic control ECU online; (2) the utility model can compare and detect the functions of all input signals of the WP13.605 electronic control ECU online, digitally display the input signals, and perform functional judgment on the input sensors and corresponding circuits; (3) the utility model can compare and detect the functions of all output signals of the WP13.605 electronic control ECU online, can manually turn on and off the injector, and use indicator lights to display its working status , accurately display the current value of the injector metering unit; (4) The utility model can detect the function of the WP13.605 electronic control ECU offline, and can perform functional judgments on all input and output terminals of the electronic control ECU according to the actual operating logic; (5) The utility model can complete the convenient disassembly and assembly detection of the WP13.605 engine low-pressure oil circuit online; (6) The utility model can complete the convenient disassembly and assembly detection of the WP13.605 engine high-pressure oil circuit online; (7) The utility model can complete the precise metering of the fuel return oil circuit of the WP13.605 engine online. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the side layout of the X1 end of the utility model.

[0020] Figure 2 This is a schematic diagram of the layout of the engine side at the X2 end of the utility model.

[0021] Figure 3It is a schematic diagram of the side layout of the X1 end of the utility model.

[0022] Figure 4 This is a schematic diagram of the layout of the engine side at the X2 end of the utility model.

[0023] Figure 5 This is a schematic diagram of the opening of the vehicle side panel at the X1 end of the utility model.

[0024] Figure 6 This is a schematic diagram of the opening of the engine side panel at the X2 end of the utility model.

[0025] Figure 7 This is the circuit diagram of the vehicle side plug at the ECU X1 end of the utility model.

[0026] Figure 8 This is the circuit diagram of the engine side plug at the ECU X2 end of the utility model. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0028] Embodiment: In this embodiment, the main technical parameters of this training device are: working temperature range: 40℃ ~ +55℃, storage temperature range: -40℃ ~ +55℃, working mode: online / offline, working voltage: DC24V~28V when online, AC220V when offline, working current: ≤15A.

[0029] like Figure 1-Figure 8 The engine electronic control system and oil circuit non-destructive maintenance training device shown in the figure includes an ECU circuit detection unit and a fuel high-pressure and low-pressure detection unit. The ECU circuit detection unit includes an ECU X1-end vehicle-side connection terminal detection box and an ECU X2-end engine-side connection terminal detection box. This maintenance training device is equipped with an on-box electrical detection package for quickly judging the circuit working condition and line conduction status.

[0030] The vehicle-side connection terminal detection box at the ECU X1 end is used for vehicle input signal detection and vehicle output load display; the engine-side connection terminal detection box at the ECU X2 end is used for engine vehicle input signal detection and engine output load display; the output signal of the original ECU can be visualized and centrally displayed in the inspection box, and the multi-channel sensor signals of the original vehicle can be simulated and replaced. The signal input channel is selected through the conversion switch, and the input signal is quantified by a digital instrument or oscilloscope, and the signal size and waveform of the online vehicle-mounted sensor can be displayed in real time.

[0031] The fuel high-pressure and low-pressure detection unit is used for accurate measurement of the engine fuel return oil circuit and convenient disassembly and detection of the engine high- and low-pressure oil circuits; it can accurately determine the working condition of the oil circuit and quickly determine the location of the oil circuit blockage.

[0032] The fuel high-pressure and low-pressure detection unit includes a high-pressure oil circuit detection pipeline, a low-pressure oil circuit detection pipeline, a tee, an oil hole screw and a high- and low-pressure pointer-type oil gauge head; the workflow of the high- and low-pressure oil circuits of the WP13.605 engine is analyzed to distinguish the high-pressure and low-pressure detection points; special pressure display gauges, pipelines, conversion heads and other auxiliary materials are purchased to facilitate online real-time detection or disassembly and maintenance when a fault occurs in the oil circuit. The monitoring data can display the fault point in real time through the instrument.

[0033] The ECU X1-end vehicle-side connection terminal detection box includes a box body 1 for support, and a panel of the box body 1 is provided with component openings for display and interactive detection.

[0034] A double-sided PCB board 1 for input and output signals is installed at the rear of the box. Multiple components for detection are connected inside the PCB board 1. Three standard double-row 2.54-pitch male pin sockets are set on the PCB board 1 at the rear of the box. The pins of the three sockets correspond to the pins of the electronic control ECU one by one, and a total of 76 test jacks are installed on the maintenance box panel.

[0035] The socket on PCB board 1 and the test socket are connected with standard cables. All signal detection is carried out without causing any damage to the original vehicle circuit. Terminal plugs and sockets are designed specifically for the whole vehicle, which can be directly plugged in and out. A dedicated vehicle terminal test area is designed, which corresponds to the pins of the electronic control ECU socket one by one, so that all terminals can be quickly and accurately detected directly on the maintenance box.

[0036] The vehicle signal input terminals include: accelerator pedal, multi-state switch, vehicle speed sensor, main brake switch, exhaust brake switch, auxiliary brake switch, handbrake switch clutch switch, neutral switch, diagnostic request switch, outrigger switch, water in oil sensor, air conditioning request switch, under-vehicle start switch, under-vehicle stop switch, remote throttle switch, multi-level vehicle speed display enable switch, secondary vehicle speed limit switch, CAN0 line (communication / diagnosis) CAN1 line (flashing), key-on start switch.

[0037] The vehicle signal output terminal includes: OBD light, cold start light, water in oil indicator light, diagnostic light / flash code light, and exhaust brake valve.

[0038] The ECU X2-end engine-side connection terminal test box includes a box body 2 for support, and a panel of the box body 2 is provided with component openings for display and testing.

[0039] A double-sided PCB board 2 for input and output signals is installed at the rear of the second box. Multiple components for detection are connected inside the second PCB board. Three standard double-row 2.54-pitch male pin sockets are set on the second PCB board at the rear of the second box. The pins of the three sockets correspond to the pins of the electronic control ECU one by one, and a total of 76 test jacks are installed on the panel of the second box.

[0040] The socket on PCB board 2 and the test socket are connected with standard cables. The terminal plug and socket are designed specifically for the engine, which can be directly plugged in and out. The dedicated engine terminal test area is designed, which corresponds one by one to the pins of the electronic control ECU socket, so that all terminals can be quickly and accurately tested directly on the maintenance box.

[0041] Engine signal input terminal: fan speed sensor, intake air temperature and pressure sensor, coolant temperature sensor, rail pressure sensor, oil temperature and pressure sensor, crankshaft speed sensor, camshaft speed sensor.

[0042] Engine signal output terminal: 1~6 cylinder injector working indication, injector flow metering unit working current display.

[0043] In order to ensure the original design intention of non-destructive testing of electronic circuits, the device adopts the connection form of integrated terminal plug-in and docking, which not only ensures non-destructive testing, but also ensures the integrity of the signal. Special plugs and sockets are purchased, and the PCB board connected with the original plugs and sockets is optimized. In order to facilitate the distinction of functional principles, color-separated welding signal connection lines are used to ensure the consistency of the newly made plug connectors and the original plug connectors.

[0044] In order to facilitate the input and output of two sets of 76-pin signal lines, a double-sided PCB board is designed and installed at the rear of the maintenance box, and the corresponding socket outlet holes are engraved on the aluminum shell board at the rear end. The PCB board is internally connected to all components arranged on the panel, such as the panel analog switch, potentiometer knob, oscilloscope, digital instrument, and detection hole. Because there are many connecting leads, in order to facilitate layout, a standard terminal row with a smaller spacing of 2.50mm is selected in a limited area, divided into a quadrilateral design layout, each terminal is marked with a clear lead definition, and the plugs and sockets must be plugged in one by one.

[0045] In order to facilitate the detection of all the pins of the original engraved ECU, three standard double-row 2.54 pitch male pin sockets are designed on the input and output connection board PCB at the rear end of the two detection boxes. The pins of the three sockets correspond to the pins of the electronic control ECU one by one, and a total of 76 pins of test jacks are designed and installed on the maintenance box panel, which can be easily detected with a multimeter or oscilloscope probe. The PCB board socket and the detection socket are connected with a standard flat cable.

[0046] This maintenance training device includes two maintenance modes. The first maintenance mode is online detection; the second maintenance mode is offline detection.

[0047] When the engine ECU is installed on the vehicle, perform online detection. The specific steps are as follows:

[0048] S1. Park the vehicle to be inspected in the designated area, turn off the engine, disconnect the power of the entire vehicle, and unplug the two dedicated plugs X1 and X2 of the engine ECU according to the operating requirements.

[0049] S2. First, connect the male pin input plug marked with X1-IN at the rear end of the X1 adapter test box to the female socket removed from the original car, and then connect the female socket marked with X1-OUT to the male pin socket at the X1 end of the ECU. Note that during the connection process, do not pull the terminal hard to prevent damage to the internal connection pins.

[0050] S3. Connect the two plugs at the rear of the X2 terminal box in the same way as above.

[0051] S4. All the selection switches of the two inspection boxes are turned to the "vehicle-mounted" and "on" positions on the panel to ensure the connectivity of the original signal, and all the analog switches are set to be consistent with the original vehicle status. At this time, the two inspection boxes do not perform any control on the engine ECU, allowing the signal to be input and output normally.

[0052] S5. After the above connections and settings are checked and found to be correct, the vehicle can be powered on and started if necessary. At this time, all instruments display the real-time data of the vehicle-mounted and engine signal input terminals. Select the single-channel signal to be tested. According to the test needs, the input terminal selection switch can be turned from the "vehicle-mounted" position to the "given" position, and the corresponding data signal can be manually adjusted; the output terminal selection switch can be turned from the "on" position to the "off" position. The ECU computer decoder can be connected to check the data flow to determine the specific location of the fault point.

[0053] After removing the engine ECU from the vehicle, perform offline testing. The specific steps are as follows:

[0054] S1. In the workshop or training room, place the ECU on a spacious, flat and insulated work surface, in the upper front of the table. The X1 test box is placed on the lower right side, and the X2 test box is placed on the lower left side.

[0055] S2. According to the connection method for on-board online detection, only connect the two terminal wires of the detection box X1-OUT and X2-OUT, and move all the selection switches from the "on-board" position to the "given" position. Connect the mains power supply and close the switch. The X1 detection box will display the power supply voltage and working current, and initially check whether it is normal.

[0056] S3. Be sure to refer to the normal operation logic of each switch when in the vehicle, connect or disconnect the corresponding input terminal, and check the specific status changes of the corresponding output terminal of the ECU. During the whole process, you can connect the ECU computer decoder to the OBD interface for data flow detection to view data changes in real time.

[0057] S4. Refer to the troubleshooting manual, decoder data stream, waveform display, voltage and current measurement values ​​and other multi-channel parameter comparisons to quickly verify the functional status of each terminal of the disconnected ECU.

Claims

1. A training device for non-destructive maintenance of engine electronic control system and oil circuit, characterized in that: It includes an ECU circuit detection unit and a fuel high-pressure and low-pressure detection unit, wherein the ECU circuit detection unit includes an ECU X1 end vehicle side connection terminal detection box and an ECU X2 end engine side connection terminal detection box; The ECU X1 end vehicle side connection terminal detection box is used to detect the vehicle input end signal and display the vehicle output end load; The ECU X2 end engine side connection terminal detection box is used to detect the engine vehicle input terminal signal and display the engine output terminal load; The fuel high-pressure and low-pressure detection unit is used for accurate measurement of the engine fuel return oil circuit and convenient disassembly and detection of the engine high-pressure and low-pressure oil circuits.

2. The engine electronic control system and oil circuit non-destructive maintenance training device according to claim 1, characterized in that: The fuel high-pressure and low-pressure detection unit comprises a high-pressure oil circuit detection pipeline, a low-pressure oil circuit detection pipeline, a tee, an oil hole screw and a high-pressure and low-pressure pointer type oil gauge head.

3. The engine electronic control system and oil circuit non-destructive maintenance training device as claimed in claim 1, characterized in that: The ECU X1-end vehicle-side connection terminal detection box includes a box body 1 for support, and a panel of the box body 1 is provided with component openings for display and interactive detection.

4. The engine electronic control system and oil circuit non-destructive maintenance training device as claimed in claim 3, characterized in that: A double-sided PCB board 1 for inputting and outputting signals is installed at the rear of the box body 1, and a plurality of components for detection are connected inside the PCB board 1. Three standard double-row 2.54-pitch male pin sockets are arranged on the PCB board 1 at the rear of the box body 1, and the pins of the three sockets correspond one-to-one to the pins of the electronic control ECU, and a total of 76 corresponding test jacks are installed on the maintenance box panel.

5. The engine electronic control system and oil circuit non-destructive maintenance training device as claimed in claim 4, characterized in that: The socket on the PCB board 1 and the detection seat are connected correspondingly using standard flat cables.

6. The engine electronic control system and oil circuit non-destructive inspection and repair training device as claimed in claim 1, characterized in that: The ECU X2 end engine side connection terminal detection box includes a second box body for support, and a panel of the second box body is provided with component openings for display and detection.

7. The engine electronic control system and oil circuit non-destructive maintenance training device as claimed in claim 6, characterized in that: A double-sided PCB board 2 for inputting and outputting signals is installed at the rear of the second box body, and a plurality of components for detection are connected inside the second PCB board. Three standard double-row 2.54-pitch male pin sockets are arranged on the second PCB board at the rear of the second box body, and the pins of the three sockets correspond one-to-one to the pins of the electronic control ECU, and a total of 76 corresponding test jacks are installed on the panel of the second box body.

8. The engine electronic control system and oil circuit non-destructive maintenance training device as claimed in claim 7, characterized in that: The socket on the second PCB board and the detection socket are connected correspondingly using standard flat cables.

9. The engine electronic control system and oil circuit non-destructive maintenance training device as claimed in claim 8, characterized in that: The maintenance training device has two maintenance modes, the first maintenance mode is online detection; the second maintenance mode is offline detection.

10. The engine electronic control system and oil circuit non-destructive maintenance training device as claimed in claim 1, characterized in that: The maintenance training device is equipped with an accompanying electrical detection package for quickly determining the circuit working condition and line conduction state.

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