CN104181918A - DCU electrical control unit testing system - Google Patents
DCU electrical control unit testing system Download PDFInfo
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- CN104181918A CN104181918A CN201410481617.XA CN201410481617A CN104181918A CN 104181918 A CN104181918 A CN 104181918A CN 201410481617 A CN201410481617 A CN 201410481617A CN 104181918 A CN104181918 A CN 104181918A
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Abstract
The invention discloses a DCU electrical control unit testing system. The testing system comprises a DCU testing box, an integration testing wire harness, CAN bus communication equipment and a testing table. The DCU testing box is provided with a potentiometer, an actuator indication lamp, a system power interface and a signal transmission interface. The potentiometer and the actuator indication lamp are respectively connected with the signal transmission interface. The system power interface and the signal transmission interface feed through a DCU electrical control unit to be tested through the integration testing wire harness. The CAN bus communication equipment comprises a CAN bus converter, a CAN communication wire harness and a USB wire harness. The DCU testing box, the DCU electrical control unit and the CAN communication wire harness are respectively connected with the integration testing wire harness. The CAN communication wire harness is connected with the CAN bus converter, the USB wire harness and the testing table in sequence. The integration testing wire harness comprehensively tests the functions of the DCU electrical control unit; besides, the testing system has the advantages of being visualized in operation interface, complete in testing function, simple in testing method, visual in testing result and the like.
Description
Technical field
The present invention relates to vehicle testing systems technology field, relate in particular to the test macro of a kind of vehicle DCU ECU (Electrical Control Unit) (urea-spray control module).
Background technology
For guaranteeing quality and the usability of car load, DCU needs to test in its Assembling Production process.And at present, do not have professional test macro to test for DCU ECU (Electrical Control Unit), conventional testing tool has two kinds: the one, and connect all parts by wire harness and judge whether short circuit or the fault opening circuit, now need to use a large amount of wire harness to carry out connection, complex circuit.And while using this instrument test, first will get rid of wire harness problem, guarantee that wire harness connects normal, not only cost is high, and often because wire harness redundancy takies more space, not Portable belt; The 2nd, use oscillograph, multimeter to measure each test point on circuit board, it needs professional to test, and the test used time is longer, and cost is also higher.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of DCU electronic control unit testing system, test targetedly for the function of DCU ECU (Electrical Control Unit), there is complete function, simple to operate, the advantage such as test result is directly perceived.
For solving the problems of the technologies described above, the present invention takes following technical scheme:
A kind of DCU electronic control unit testing system, comprise DCU test box, integration testing wire harness, CAN bus communication equipment and test board, described CAN bus communication equipment comprises CAN bus converter, CAN communication wire harness and USB wire harness, described integration testing wire harness connects respectively DCU test box, DCU ECU (Electrical Control Unit) and CAN communication wire harness, realizes three's data communication; Described CAN communication wire harness is connected with test board by CAN bus converter, USB wire harness successively.
DCU test box is provided with potentiometer, actuator pilot lamp, system power supply interface and signal transmission interface, described potentiometer is connected with signal transmission interface respectively with actuator pilot lamp, described system power supply interface and signal transmission interface are communicated with DCU ECU (Electrical Control Unit) to be measured by integration testing wire harness respectively, and system power supply interface provides working power to DCU ECU (Electrical Control Unit) to be measured.
The number of potentiometer and actuator pilot lamp can arrange according to the actual requirements, the preferred potentiometer of the present invention comprises urea temperature potentiometer, urea level potentiometer, urea pressure potentiometer and exhaust temperature potentiometer, and actuator pilot lamp comprises nozzle operation pilot lamp, pump work pilot lamp, pipeline heating pilot lamp, casing burner on light and pump box burner on light.Described each potentiometer link respectively DCU ECU (Electrical Control Unit) to be measured signal input interface place (urea temperature input interface, urea level input interface, urea pressure input interface and exhaust temperature input interface).Described nozzle operation pilot lamp, pump work pilot lamp, pipeline heating pilot lamp, casing burner on light and pump box burner on light are connected with nozzle signal output interface, pump signal output interface, pipeline signal output interface, casing heating signal output interface and the pump box heating signal output interface of DCU ECU (Electrical Control Unit) to be measured respectively.
When use, simulate the working environment of DCU to be measured by changing the resistance value of each potentiometer, simulate by actuator pilot lamp each actuator that DCU to be measured controls.The resistance value of each potentiometer is transferred to DCU by integration testing wire harness, with steps such as settling signal collection, signal processing, logical calculated, the data transmission of each potentiometer being simulated by CAN bus communication equipment by DCU is again to test board, on test interface, directly show data, thereby realize the diagnosis of the signal input circuit of test board to DCU to be measured.The process of the state control of actuator pilot lamp, to send instruction by the test interface of test board, through CAN bus communication device transmission to DCU, DCU receives instruction and by its order-driven respective drive circuit, drive current, through integration testing wire harness, is applied to the actuator pilot lamp on DCU test box.The bright corresponding control circuit that DCU to be measured is described of actuator pilot lamp can normally be worked, otherwise cannot normally work.
Integration testing wire harness comprises system power supply line, signal transmssion line and OBD diagnostics lines, one end of system power supply line is provided with the system power supply connector for connected system power interface, one end of signal transmssion line is provided with the signal feed-through connector for connecting signal transmission interface, one end of OBD diagnostics lines is connected with OBD diagnosis connector, the connection terminal of the other end of system power supply line, signal transmssion line and OBD diagnostics lines is integrated on a DCU signal socket connector, and described DCU signal socket connector is connected with DCU ECU (Electrical Control Unit) to be measured; OBD diagnostic plug is connected with CAN communication wire harness, is connected on test board by CAN bus converter and USB wire harness.CAN bus converter is provided with CAN bus interface and is connected with USB wire harness with CAN communication wire harness respectively with USB interface.
Test board is provided with CAN bus communication device driver module and test interface application module.Test interface application module mainly comprises that program writes with a brush dipped in Chinese ink module, automatic cycle testing module, nozzle characteristic testing module, pump pressure test module, pipeline heating test module, casing heating test module, pump box heating test module and signal monitoring module.
CAN bus communication device driver module is for realizing the data communication between test board and CAN bus communication equipment, in the time of CAN bus communication equipment connection test board, test board can be identified its equipment and can connect and carry out data communication with this CAN bus communication equipment.
Program is write with a brush dipped in Chinese ink module for realizing test board to the writing with a brush dipped in Chinese ink of DCU ECU (Electrical Control Unit) built-in function program to be measured and application data, to ensure the integrality of DCU ECU (Electrical Control Unit), and in operative condition.
Automatic cycle testing module is one-touch test function, activate this function, test interface application program Automatic continuous sends instruction to DCU ECU (Electrical Control Unit), drives all output interfaces of DCU ECU (Electrical Control Unit), and whether the actuator pilot lamp of test DCU test box is lighted by the order of sending instruction.The design of this function is convenient and swift, sends one by one instruction without tester, avoids some output interfaces repeatedly to measure or lose detecting leakage.
Nozzle characteristic testing module, pump pressure test module, pipeline heating test module, casing heating test module, pump box heating test module are for the independent test function of each output interface of DCU ECU (Electrical Control Unit), can test targetedly, whether the actuator pilot lamp of the corresponding interface of test DCU test box is lighted by sending instruction.
Whether whether signal monitoring module shows the data of each potentiometer simulation, changes the resistance of potentiometer, can observe very intuitively each respective signal and change, normal to judge input interface circuit corresponding to DCU ECU (Electrical Control Unit).
The whole system that all functions of test interface application module form in conjunction with CAN bus communication equipment, integration testing wire harness and DCU test box has completed the test of DCU ECU (Electrical Control Unit) hardware circuit.
Beneficial effect: (1) the present invention uses DCU test box that DCU ECU (Electrical Control Unit) test simulation working environment is provided, and can carry out visualization interface operation by test board, and test result is simple and clear.(2) the present invention is to DCU ECU (Electrical Control Unit) hardware circuit aspect performance test complete function, and test process is simple and convenient.(3) the present invention can be used for for the diagnosing malfunction analysis of DCU ECU (Electrical Control Unit) after sale, reduces False Rate, well controls DCU breakdown maintenance cost after sale.(4) simple to operation, the complete function of system of the present invention, test are directly perceived, be convenient to those of ordinary skill or maintenance personal and use, and Measuring Time is short, cost is low, is convenient to promote the use of.
Brief description of the drawings
Fig. 1 is DCU electronic control unit testing system composition diagram of the present invention.
Fig. 2 is DCU ECU (Electrical Control Unit) test philosophy structural drawing of the present invention.
Fig. 3 is DCU ECU (Electrical Control Unit) test connection layout of the present invention.
Fig. 4 is DCU test box structure composition schematic diagram of the present invention.
Fig. 5 is DCU test box electrical schematic diagram of the present invention.
Wherein: 1, DCU test box, 2, integration testing wire harness, 3, system power supply line, 4, signal transmssion line, 5, OBD diagnostics lines, 6, system power supply plug, 7, signal transmission plug, 8, OBD diagnostic plug, 9, DCU plug, 10, power supply changeover device, 11, signal transmission interface, 12, system power supply interface, 13, external power source interface, 14, system power supply switch 22 pilot lamp, 15, actuator pilot lamp, 16, potentiometer, 17, CAN1 communication interface, 18, CAN2 communication interface, 19, spread signal switch, 20, handle, 21, protective layer, 22, system power supply switch, 23, DCU ECU (Electrical Control Unit), 24, CAN communication wire harness, 25, CAN bus converter, 26, USB wire harness, 27, test board.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
As shown in Figure 1, Figure 2 and Figure 3, a kind of DCU electronic control unit testing system provided by the invention, comprise DCU test box 1, integration testing wire harness 2, CAN bus communication equipment and test board 27, CAN bus communication equipment comprises CAN bus converter 25, CAN communication wire harness 24 and USB wire harness 26, integration testing wire harness 2 connects respectively DCU test box 1, DCU ECU (Electrical Control Unit) 23 and CAN communication wire harness 24, realizes three's data communication; CAN communication wire harness 24 is connected with test board 27 by CAN bus converter 25, USB wire harness 26 successively.CAN bus converter 25 is provided with CAN bus interface and is connected with USB wire harness 26 with CAN communication wire harness 24 respectively with USB interface, and wherein CAN bus interface adopts serial D B15 interface.
DCU test box 1 as shown in Figure 4,5.DCU test box 1 is provided with potentiometer 16, actuator pilot lamp 15, system power supply interface 12 and signal transmission interface 11, potentiometer 16 is connected with signal transmission interface 11 respectively with actuator pilot lamp 15, and system power supply interface 12 and signal transmission interface 11 are communicated with DCU ECU (Electrical Control Unit) 23 to be measured by integration testing wire harness 2 respectively.System power supply interface 12 provides working power to DCU ECU (Electrical Control Unit) 23 to be measured.
Integration testing wire harness 2 comprises system power supply line 3, signal transmssion line 4 and OBD diagnostics lines 5, one end of system power supply line 3 is provided with the system power supply plug 6 for connected system power interface 12, one end of signal transmssion line 4 is provided with the signal transmission plug 7 for connecting signal transmission interface 11, one end of OBD diagnostics lines 5 is connected with above-mentioned OBD diagnostic plug 8, and the connection terminal of the other end of described system power supply line 3, signal transmssion line 4 and OBD diagnostics lines 5 is arranged on same DCU Signal plug 9.DCU Signal plug 9 is connected with DCU ECU (Electrical Control Unit) 23 to be measured.OBD diagnostic plug 8 is connected with CAN communication wire harness 24, is connected on test board 27 by CAN bus converter 25 and USB wire harness 6.
DCU test box 1 is simulated the working environment of DCU ECU (Electrical Control Unit) 23 to be measured by changing the resistance value of each potentiometer 16, simulate by actuator pilot lamp 15 each actuator that DCU ECU (Electrical Control Unit) 23 to be measured is controlled.The resistance value of each potentiometer 16 is transferred to DCU ECU (Electrical Control Unit) 23 to be measured as testing source by the signal transmssion line 4 of integration testing wire harness 2, after the steps such as DCU ECU (Electrical Control Unit) 23 settling signal collections to be measured, signal processing, logical calculated, the data transmission of each potentiometer 16 being simulated by OBD diagnostics lines 5, CAN bus communication equipment is to test board 27, test board 27 directly shows data on test interface, thereby realizes the diagnosis of the signal input circuit of test board 27 to DCU ECU (Electrical Control Unit) 23 to be measured.The process of the state control of actuator pilot lamp 15, to send instruction by the test interface of test board 27, be transferred to DCU ECU (Electrical Control Unit) 23 to be measured through CAN bus communication equipment, OBD diagnostics lines 5, DCU ECU (Electrical Control Unit) 23 to be measured receives instruction and by the corresponding control circuit of its order-driven, drive current, through the signal transmssion line 4 of integration testing wire harness 2, is applied to the actuator pilot lamp 15 on DCU test box 1.The bright corresponding control circuit that DCU ECU (Electrical Control Unit) 23 to be measured is described of actuator pilot lamp 15 can normally be worked, otherwise cannot normally work.
Test board 27 is provided with CAN bus communication device driver module and test interface application module.Test interface application module mainly comprises that program writes with a brush dipped in Chinese ink module, automatic cycle testing module, nozzle characteristic testing module, pump pressure test module, pipeline heating test module, casing heating test module, pump box heating test module and signal monitoring module.
CAN bus communication device driver module is for realizing the data communication between test board 27 and CAN bus communication equipment, in the time of CAN bus communication equipment connection test board 27, test board 27 can be identified its equipment and can connect and carry out data communication with this CAN bus communication equipment.
Program is write with a brush dipped in Chinese ink module for realizing test board 27 to the writing with a brush dipped in Chinese ink of DCU ECU (Electrical Control Unit) 23 built-in function programs to be measured and application data, to ensure the integrality of DCU ECU (Electrical Control Unit) 23, and in operative condition.
Automatic cycle testing module is one-touch test function, activate this function, test interface application program Automatic continuous sends instruction to DCU ECU (Electrical Control Unit) 23, drives DCU ECU (Electrical Control Unit) 23 all output interfaces, and whether the actuator pilot lamp 15 of test DCU test box 1 is lighted by the order of sending instruction.
Nozzle characteristic testing module, pump pressure test module, pipeline heating test module, casing heating test module, pump box heating test module are for the independent test function of each output interface of DCU ECU (Electrical Control Unit) 23, can test targetedly, whether the actuator pilot lamp 15 of the corresponding interface of test DCU test box 1 is lighted by sending instruction.
Whether whether signal monitoring module shows the data that each potentiometer 16 is simulated, and changes the resistance of potentiometer 16, can observe very intuitively each respective signal and change, normal to judge the input interface circuit of DCU ECU (Electrical Control Unit) 23 correspondences.
The whole system that all functions of test interface application program form in conjunction with CAN bus communication equipment, integration testing wire harness 2 and DCU test box 1 has completed the test of DCU ECU (Electrical Control Unit) 23 hardware circuits.
Test board 27 can be computer, notebook, smart mobile phone or other intelligent terminals.
In DCU test box 1, the number of potentiometer 16 and actuator pilot lamp 15 can arrange according to the actual requirements, as shown in Figure 5, the present embodiment needs the working environment state of real-time perception SCR after-treatment system in view of the DCU ECU (Electrical Control Unit) 23 in state's four vehicle SCR after-treatment systems, as urea temperature, urea level, urea pressure and exhaust temperature, for this reason, above-mentioned potentiometer 16 comprises urea temperature potentiometer 16, urea level potentiometer 16, urea pressure potentiometer 16 and exhaust temperature potentiometer 16, and adopt successively Turea urea temperature potentiometer 16, Lurea urea level potentiometer 16, Purea urea pressure potentiometer 16 and Tpre exhaust temperature potentiometer 16, and each potentiometer 16 is connected with DCU signal transmission interface 11 respectively.Simulate the working environment state of DCU to be measured by above-mentioned potentiometer 16, and be transferred to DCU to be measured, and as the testing source of test board 27, easy to use.
In addition, according to the actual controlled actuator kind of DCU ECU (Electrical Control Unit) 23 in state's four vehicle SCR after-treatment systems, above-mentioned actuator pilot lamp 15 comprises nozzle operation pilot lamp, pump work pilot lamp, pipeline heating pilot lamp, casing burner on light and pump box burner on light, and described nozzle operation pilot lamp, pump work pilot lamp, pipeline heating pilot lamp, casing burner on light and pump box burner on light are connected with DCU signal transmission interface 11 respectively.DCU signal transmission interface 11 comprises signal input interface and signal output interface.Each potentiometer link respectively DCU ECU (Electrical Control Unit) to be measured signal input interface place (urea temperature input interface, urea level input interface, urea pressure input interface and exhaust temperature input interface).Described nozzle operation pilot lamp, pump work pilot lamp, pipeline heating pilot lamp, casing burner on light and pump box burner on light are connected with nozzle signal output interface, pump signal output interface, pipeline signal output interface, casing heating signal output interface and the pump box heating signal output interface of DCU ECU (Electrical Control Unit) to be measured respectively.
When use, test board sends instruction to DCU ECU (Electrical Control Unit) 23 to be measured, such as test nozzles partial circuit, diagnostic tool sends the instruction of nozzle operation, DCU ECU (Electrical Control Unit) 23 to be measured receives this corresponding instruction, closed-nozzle operating circuit, and now nozzle pilot lamp is bright, its corresponding circuit can normally be worked, otherwise has fault.
DCU test box 1 is also provided with external power source interface 13, external power source interface 13 is connected with system power supply interface 12 by a power supply changeover device 10, power supply changeover device 10 is arranged in casing, between power supply changeover device 10 and system power supply interface 12, be provided with power switch 22, described power switch 22 is arranged on casing.Between described power switch 22 and system power supply interface 12, be provided with power switch 22 pilot lamp 14, and power switch 22 pilot lamp 14 are arranged on casing.What described power supply changeover device 10 adopted is that universal 220V is exchanged to the power supply changeover device 10 that is converted to 24V direct-current switch power supply, when use, this power supply changeover device 10 is converted to the alternating current of 220V in the direct current of 24V, for the design and DCU ECU (Electrical Control Unit) 23 to be measured are powered.And can be the design and DCU ECU (Electrical Control Unit) to be measured 23 normal power supply time, power switch 22 pilot lamp 14 are bright, otherwise can not normal power supply.Whether normal the use of power switch 22 pilot lamp 14, be convenient to observe intuitively power supply.
DCU test box 1 is also provided with CAN communication interface, is specially CAN1 communication interface 17 and CAN2 communication interface 18, and CAN1 communication interface 17 is connected respectively described signal transmission interface 11 with CAN2 communication interface 18.In the time that DCU ECU (Electrical Control Unit) 23 to be measured occurs that CAN bus data sends problem, available CAN bus diagnostic instrument reads the data analysis that DCU ECU (Electrical Control Unit) 23 to be measured sends, and solves failure problems.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1. a DCU electronic control unit testing system, is characterized in that: comprise DCU test box, integration testing wire harness, CAN bus communication equipment and test board, described CAN bus communication equipment comprises CAN bus converter, CAN communication wire harness and USB wire harness; Described integration testing wire harness connects respectively DCU test box, DCU ECU (Electrical Control Unit) and CAN communication wire harness, realizes three's data communication; Described CAN communication wire harness is connected with test board by CAN bus converter, USB wire harness successively.
2. a kind of DCU electronic control unit testing system according to claim 1, it is characterized in that: described DCU test box is provided with potentiometer, actuator pilot lamp, system power supply interface and signal transmission interface, described potentiometer is connected with signal transmission interface respectively with actuator pilot lamp, and described system power supply interface and signal transmission interface are communicated with DCU ECU (Electrical Control Unit) to be measured by integration testing wire harness respectively.
3. a kind of DCU electronic control unit testing system according to claim 2, it is characterized in that: described integration testing wire harness comprises system power supply line, signal transmssion line and OBD diagnostics lines, one end of described system power supply line is provided with the DCU attaching plug for connected system power interface, one end of described signal transmssion line is provided with the DCU signal transmission plug for connecting signal transmission interface, one end of described OBD diagnostics lines is connected with OBD diagnostic plug, described system power supply line, the connection terminal of the other end of signal transmssion line and OBD diagnostics lines is arranged on same DCU Signal plug, described DCU Signal plug is connected with DCU ECU (Electrical Control Unit) to be measured, described OBD diagnostic plug is connected with CAN communication wire harness.
4. a kind of DCU electronic control unit testing system according to claim 2, it is characterized in that: described potentiometer comprises urea temperature potentiometer, urea level potentiometer, urea pressure potentiometer and exhaust temperature potentiometer, each potentiometer is connected with DCU signal input interface respectively.
5. a kind of DCU electronic control unit testing system according to claim 2, it is characterized in that: described actuator pilot lamp comprises nozzle operation pilot lamp, pump work pilot lamp, pipeline heating pilot lamp, casing burner on light and pump box burner on light, described nozzle operation pilot lamp, pump work pilot lamp, pipeline heating pilot lamp, casing burner on light and pump box burner on light respectively with the nozzle signal output interface of DCU ECU (Electrical Control Unit) to be measured, pump signal output interface, pipeline signal output interface, casing heating signal output interface is connected with pump box heating signal output interface.
6. a kind of DCU electronic control unit testing system according to claim 1, it is characterized in that: described test board is provided with CAN bus communication device driver module and test interface application module, described CAN bus communication device driver module is for realizing the data communication between test board and CAN bus communication equipment; Described test interface application program realizes the test to DCU ECU (Electrical Control Unit) hardware circuit to be measured in conjunction with CAN bus communication equipment, integration testing wire harness and DCU test box.
7. a kind of DCU electronic control unit testing system according to claim 6, is characterized in that: described test interface application module mainly comprises that program writes with a brush dipped in Chinese ink module, automatic cycle testing module, nozzle characteristic testing module, pump pressure test module, pipeline heating test module, casing heating test module, pump box heating test module and signal monitoring module;
Described program is write with a brush dipped in Chinese ink module for realizing test board writing with a brush dipped in Chinese ink DCU ECU (Electrical Control Unit) built-in function program to be measured and application data; Described automatic cycle testing module is one-touch test function, after activating, Automatic continuous sends instruction to DCU ECU (Electrical Control Unit) to be measured, drive all output interfaces of DCU ECU (Electrical Control Unit) to be measured, whether the actuator pilot lamp of test DCU test box is lighted by the order of sending instruction; Described nozzle characteristic testing module, pump pressure test module, pipeline heating test module, casing heating test module, pump box heating test module are for the independent test function of each output interface of DCU ECU (Electrical Control Unit) to be measured, and whether the actuator pilot lamp of the corresponding interface of specific aim test DCU test box is lighted by sending instruction; Whether the described signal monitoring module data that show each potentiometer simulation directly perceived are normal to judge input interface circuit corresponding to DCU ECU (Electrical Control Unit).
8. a kind of DCU electronic control unit testing system according to claim 1, is characterized in that: described CAN bus converter is provided with CAN bus interface and is connected with USB wire harness with CAN communication wire harness respectively with USB interface.
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| CN201410481617.XA CN104181918A (en) | 2014-09-19 | 2014-09-19 | DCU electrical control unit testing system |
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| CN201410481617.XA CN104181918A (en) | 2014-09-19 | 2014-09-19 | DCU electrical control unit testing system |
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Application publication date: 20141203 |
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| RJ01 | Rejection of invention patent application after publication |