CN209070362U - A kind of automobile engine ECU test device - Google Patents
A kind of automobile engine ECU test device Download PDFInfo
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- CN209070362U CN209070362U CN201821993971.0U CN201821993971U CN209070362U CN 209070362 U CN209070362 U CN 209070362U CN 201821993971 U CN201821993971 U CN 201821993971U CN 209070362 U CN209070362 U CN 209070362U
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Abstract
The utility model discloses a kind of automobile engine ECU test device, including multiple failure boards, each failure board is made of two faulty channel switching groups in parallel, and every faulty channel switching group is by three and switch even forms；Wherein, first faulty channel switching group is made of first switch, second switch and third switch, and faulty channel switching group described in Article 2 is made of the 4th switch, the 5th switch and the 6th switch；The relay array is electrically connected relay driver, the relay driver is connect with the micro-controller communications, the ECU electronic control unit is connect by A/D feed circuit with the micro-controller communications, and the microcontroller is communicated by CAN communication module with host computer.The utility model automatically can inject failure by the external terminal to ECU, emulate for HIL, accelerate the time of ECU electronic control unit measurement and verifying, shorten the development cycle.
Description
Technical field
The utility model relates to a kind of automobile engine ECU test devices, in particular to automobile engine HIL system
The multiple faults injection device of system ECU interface.
Background technique
Automobile engine ECU (Engine Control Unit, engine controller) is a kind of each portion of control internal combustion engine
The electronic device of sub-operation, is the core component in Car Electronic Control system, and reliability is directly related to engine work
Make the driving safety of state and vehicle.
Although automobile engine ECU has very high stability, its sensor signal and control actuator signal
Short circuit between signal wire easily occurs between external interface, cable harness, signal wire is opened a way, signal wire is breaking, signal is short to power supply
The failures such as road, signal wire shorted to earth.In order to ensure ECU meets all technical, development process generally will successively pass through
Design, emulation, rapid prototyping, code building and software test, hardware in loop, system calibrating and test and etc..
In many hardware in loop (HIL) test macro, need hardware fault implant module for ECU and system other
Signal fault is added between part, and then is tested, the performance of characteristic description or verifying ECU under specific failure condition.
Utility model content
The purpose of this utility model is to provide a kind of automobile engine ECU test devices, can be automatically to the outer of ECU
Portion's pin injects failure, emulates for HIL.
In order to solve the above-mentioned technical problem, the utility model provides a kind of automobile engine ECU test device, including multiple
Failure board, each failure board are made of two faulty channel switching groups in parallel, every faulty channel switch
Group is by three and switch even forms；Wherein, first faulty channel switching group is by first switch, second switch and third
Switch forms, and faulty channel switching group described in Article 2 is made of the 4th switch, the 5th switch and the 6th switch；Every event
Barrier channel switch group one end is communicatively connected to the pin of ECU electronic control unit, is located at every faulty channel switching group other end,
The first switch communicates to connect I/O interface module, and the second switch is connected to power supply VCC by power switch, and described the
Three switches pass through ground switch earthing；4th Switch Communication connects I/O interface module, and the 5th switch is opened by power supply
Connection is connected to power supply VCC, and the 6th switch passes through ground switch earthing；Wherein, the first switch, second switch, third
Switch, the 4th switch, the 5th switch, the 6th switch, power switch, earthing switch are driven by relay array and are opened and closed；It is described
Relay array is electrically connected relay driver, and the relay driver is connect with micro-controller communications, and the ECU is automatically controlled
The pin of unit also passes through A/D feed circuit and connect with the micro-controller communications, and the microcontroller passes through CAN communication module
It is communicated with host computer.
Embodiment as a preferred embodiment of the above technical solution, automobile engine ECU provided by the embodiment of the utility model are surveyed
It further comprises some or all of following technical characteristic that trial assembly, which is set:
As an improvement of the above technical solution, in one embodiment of the utility model, the relay driver packet
It includes relay driving chip U1 and relay driving chip U2, the relay driving chip U1 and relay driving chip U2 is equal
Using MC1413BD, inside include 7 Darlington transistor arrays, A1-A7 is the microcontroller signal input tube foot, Y1-
Y7 is output pin；The input pin of the relay driving chip U1 is connect with the microcontroller signal, the relay
The output pin of driving chip U1 and the coil input end of relay switch are electrically connected；The relay driving chip U2's is defeated
The coil input end of pin communication connection relay switch K7, relay switch K8 out, the relay driving chip U2 input
Pin communication connects the pin of the microcontroller.
Further, the microcontroller uses MC9S12HY64VLL comprising have 64 pins, 1 road CAN, 28 it is fixed
When device, 8 channels 10 channels AD, the channel AD and the A/D feed circuit communicate to connect, the pin 76-81 and
The A1-A7 pin of pin 37 and the relay driving chip U1 communicate to connect, the pin 88, pin 87 and the relay
A1, A2 pin of driving chip U2 communicates to connect, and the microcontroller connects the CAN communication by CAN communication interface signal
Module.
As an improvement of the above technical solution, in one embodiment of the utility model, the ECU electronic control unit and every
The connecting pin of faulty channel switching group described in item is also connected with fuse.
As an improvement of the above technical solution, in one embodiment of the utility model, the I/O interface module difference
Communicate to connect sensor, driver.
Compared with prior art, the utility model has the following beneficial effects: the utility model can be automatically to ECU's
External terminal injects failure, emulates for HIL, accelerates the time of ECU electronic control unit measurement and verifying, shortens the development cycle.
Detailed description of the invention
It, below will be to institute in embodiment or description of the prior art in order to illustrate more clearly of the technical solution of the utility model
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some of the utility model
Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is the functional block diagram of the utility model automobile engine ECU test device；
Fig. 2 is the circuit diagram of the utility model figure failure board；
Fig. 3 is the circuit diagram of the utility model relay driving chip U1；
Fig. 4 is the circuit diagram of the utility model relay driving chip U2；
Fig. 5 is the logically equivalent circuit figure of the utility model relay driving chip U1 or relay driving chip U2；
Fig. 6 is the minimum system circuit diagram of the utility model microcontroller；
Fig. 7 is the connection schematic diagram of the utility model host computer and CAN communication module；
Fig. 8 is the circuit diagram of the utility model A/D feed circuit.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are in the premise for not making creative work
Under every other embodiment obtained, fall within the protection scope of the utility model.
As shown in figures 1-8, automobile engine ECU test device provided by the utility model, including multiple failure boards 10,
Each failure board 10 is made of two faulty channel switching groups in parallel, and every faulty channel switching group is by three
And switch composition even；Wherein, first faulty channel switching group is by first switch, second switch and third switching group
At faulty channel switching group described in Article 2 is made of the 4th switch, the 5th switch and the 6th switch；Every faulty channel
Switching group one end is communicatively connected to the pin of ECU electronic control unit 20, is located at every faulty channel switching group other end, described
First switch communicates to connect I/O interface module 30, and the second switch is connected to power supply VCC, the third by power switch
Switch passes through ground switch earthing；4th Switch Communication connects I/O interface module 30, and the 5th switch is opened by power supply
Connection is connected to power supply VCC, and the 6th switch passes through ground switch earthing；Wherein, the first switch, second switch, third
Switch, the 4th switch, the 5th switch, the 6th switch, power switch, earthing switch are driven by relay array 40 and are opened and closed；Institute
It states relay array 40 and is electrically connected relay driver 50, the relay driver 50 is communicated to connect with microcontroller 60,
The pin of the ECU electronic control unit also (ECU) DUT_Ch0, (ECU) DUT_Ch1 pass through A/D feed circuit 70 and the microcontroller
Device 60 communicates to connect, and the microcontroller 60 is communicated by CAN communication module 80 with host computer 90.Wherein, the automatically controlled list of the ECU
Member 20 and the connecting pin of every faulty channel switching group are also connected with fuse.The I/O interface module 30 communicates respectively
Connect sensor 100, driver 110.Specifically, sensor 100 can be clutch, throttle, brake, and driver 110 can be with
It is air throttle, spark plug, fuel injector, the test device of the utility model is used for analog circuit fault, detects automobile engine ECU
The response that electronic control unit is generated in Power Generation Road failure.
Specifically, logical in first failure as shown in Fig. 2, each failure board 10 contains two faulty channel switching groups
In road switching group, first is connected after 20 signal input port of ECU electronic control unit (ECU) DUT_Ch0, the self-recovery fuse F1 that connects
The signal input part (2,6,10) of switch K1, second switch K2, third switch K3, wherein first switch K1, second switch K2,
Third switch K3 is single-pole single-throw(SPST relay switch, and the signal output end 1 of first switch K1 connects the letter of I/O interface module 30
The signal output end (5,9) of number input terminal ((IO) Ch0), second switch K2 and third switch K3 are respectively as failure 2, failure 3
Connecting pin (33,34) power supply and ground connection are connected to by relay switch K7, relay switch K8 respectively；In Article 2 failure
In channel switch group, the is connected after 20 signal input port of ECU electronic control unit (ECU) DUT_Ch1, the self-recovery fuse F2 that connects
The signal input part (14,18,22) of four switch K4, the 5th switch K5, the 6th switch K6, wherein the 4th switch K4, the 5th switch
K5, the 6th switch K6 are also single-pole single-throw(SPST relay switch, and the signal output end 13 of the 4th switch K4 connects I/O interface module
30 signal input part ((IO) Ch1), the signal output end (17,21) of the 5th switch K5 and the 6th switch K6 are respectively as failure
2, the connecting pin (33,34) of the connecting pin (33,34) of failure 3, failure 2 and failure 3 passes through relay switch K7, relay respectively
Switch K8 is connected to power supply and ground connection；The failure 2 of two faulty channel switching groups and the connecting pin of failure 3 and company.
In the fault-injection module of the utility model, each channel to one or more fault bus open a way or
Short circuit.First switch K1 and the 4th switch K4 are just closed in original state, and I/O interface module 30 leads directly to the letter of ECU electronic control unit 20
Number input terminal, is connected (IO) _ CH0 with (ECU) DUT_Ch0, (IO) _ CH1 with (ECU) DUT_Ch1, in such a mode, failure
Board 10, A/D feed circuit 70 and microcontroller 60 are not influenced by ECU and test macro.
As shown in Figure 3-4, the relay driver 50 includes relay driving chip U1, relay driving chip U2,
Relay driving chip U1, relay driving chip U2 are all made of MC1413BD, there is 7 Darlington transistor battle arrays inside MC1413BD
Column, A1-A7 is relay driving chip signal input pin, and Y1-Y7 is output pin.The input pipe of relay driving chip U1
Foot is connect with microcontroller signal, the output pin of the relay driving chip U1 coil input end with each relay switch respectively
(K2-8, K3-12, K1-4, K5-20, K6-24, K4-16) is electrically connected, for increasing the driving capability of microcontroller (MCU),
So that relay switch all in microcontroller driving relay circuit can be made.Relay switch is imitated by the electromagnetism of coil
On-off purpose should be reached to control mechanical contact.The Y1-Y2 output pin communication connection relay of relay driving chip U2 is opened
The coil input end 28,32 of K7, K8 are closed, relay driving chip U2 input pin communicates to connect the pin of microcontroller (MCU),
As shown in figure 5, being the logically equivalent circuit figure of relay driving chip U1 or relay driving chip U2.
As shown in fig. 6, microcontroller 60 uses MC9S12HY64VLL, there are 64 pins, 1 road CAN, 28 bit timing devices, 8
10 channels AD in a channel integrate 16 performances and many customization function such as LCD driving and stepper motor driving etc., fit
Emerging automobile market is closed, R35, R26 of the channel AD (FB_Ch1, FB_Ch0) and A/D feed circuit are communicated to connect, pin 76-81
And the A1-A7 pin communication connection of pin 37 and relay driving chip U1, pin 88, pin 87 and relay driving chip U2
A1, A2 pin communication connection, microcontroller by CAN communication interface (TXCAN, RXCAN) signal connect CAN communication module.
As shown in fig. 7, being the connection schematic diagram of CAN communication module and host computer, keep automobile engine ECU test device logical
CAN communication module is crossed to communicate with host computer.
As shown in figure 8, passing through A/D feed circuit converted measurement ECU electronic control unit pin ((ECU) DUT_Ch0 and (ECU)
DUT_Ch1 voltage value), resistance R26, R35 are communicatively connected to the pin 93,94 of microcontroller, by faulty channel switching group
Whether the connection status feedback with ECU electronic control unit pin detects relay array and completes to control and lead to failure to microcontroller
Whether working properly the control of single-pole single-throw switch (SPST) in road switching group is used to self diagnosis equipment.It is very suitable to be embedded into ECU electricity
Unit hardware is controlled in the test of ring (HIL).Such as: citing channel 0 is normally connected with I/O module when (ECU) DUT_Ch0 is in
In the case of, AD voltage value is the value of a precognition (this ECU pin function is clear).If (ECU) DUT_Ch0 is short-circuited this moment
To VCC, then while after short circuit, AD value can be synchronized as VCC voltage value, i.e. explanation is shorted to the success of VCC fault-injection,
MCU can feed back state to host computer by CAN；If it is to be shorted to GND that (ECU) DUT_Ch0, which is generalized machine logic control, this
Carving AD value can be 0 moment, namely be shorted to the success of GND fault-injection.If breaking or pin is shorted with each other fault-injection,
AD value can also change in moment, and that is to say can feed back whether be out of order implantation success.
Embodiment 1, channel open-circuit fault: the signal wire (channel) between relay driver and the automatically controlled list of ECU should be located
In the state of open circuit, to determine the response of tested ECU electronic control unit after signal interruption.4th switch K4 is by relay driving core
Piece drives and disconnects, so that (IO) _ CH1 and (ECU) DUT_Ch1 form open circuit.Certainly, if rhythmical control the
The fault type that the four intermittent switches of switch K4, also analog go out first faulty channel switching group poor contact.
Embodiment 2, channel are to power supply short circuit: relay switch first switch K1 is disconnected from closed state, second switch K2
It is driven to be closed from off-state, relay switch K7 default closure is connected to VCC.First faulty channel switching group like this
To power supply VCC short circuit.
Embodiment 3, channel are shorted over the ground: it is similar to Example 2, in Article 2 faulty channel switching group, and the 4th switch K4
It is driven to disconnect from default closed state, the 6th switch K6 is driven to closed state from default off-state, then (ECU) DUT_
Ch1 is connected to ground terminal, i.e., Article 2 faulty channel switching group is shorted with ground.
Short-circuit between embodiment 4, pin: first switch K1 and the 4th switch K4 is disconnected, second switch K2 and the 5th switch K5
Closure, while relay switch K7 is also disconnected.(ECU) DUT_Ch0 is connected to (ECU) DUT_Ch1, i.e., first faulty channel is opened
The switching group short circuit of Guan Zuyu Article 2 faulty channel.
Preceding sections describe direct fault location type.The single faulty board fixture of the utility model is infused for the failure in 10 channels
Enter, due to being equipped with microcontroller and relay array, and have CAN transmitting-receiving communication, can multiple faulty channel switching groups in parallel,
There is AD feedback in all channels to be measured, for detecting ECU electronic control unit and sensor or driver whether in normal work.
Microcontroller all passes through controller local area network's CAN bus and communicates with host computer, and host computer passes through control logic
CAN message is sent to microcontroller, and driving relay completes direct fault location, then feeds back to microcontroller further through channel AD value
To detect whether relay is completed to control.It is whether working properly for self diagnosis equipment.Wherein, microcontroller can be by upper
Position machine automatically configures fault-injection, and feeds back execution operation to host computer, is an important test as hardware in loop (HIL)
Link accelerates the time of ECU electronic control unit measurement and verifying, shortens the development cycle.
The above is preferred embodiments of the present invention, certainly cannot with this come limit the utility model it
Interest field, it is noted that for those skilled in the art, before not departing from the utility model principle
It puts, several improvement and variation can also be made, these, which improve and change, is also considered as the protection scope of the utility model.
Claims (5)
1. a kind of automobile engine ECU test device characterized by comprising
Multiple failure boards, each failure board are made of two faulty channel switching groups in parallel, every failure
Channel switch group is by three and switch even forms；Wherein, first faulty channel switching group is opened by first switch, second
It closes and third switch forms, faulty channel switching group described in Article 2 is made of the 4th switch, the 5th switch and the 6th switch；
Every faulty channel switching group one end is communicatively connected to the pin of ECU electronic control unit, and it is logical to be located at every failure
The road switching group other end, the first switch communicate to connect I/O interface module, and the second switch is connected to by power switch
Power supply VCC, the third switch pass through ground switch earthing；The 4th Switch Communication connection I/O interface module, the described 5th
Switch is connected to power supply VCC by power switch, and the 6th switch passes through ground switch earthing；Wherein, the first switch,
Second switch, third switch, the 4th switch, the 5th switch, the 6th switch, power switch, earthing switch are by relay array
Driving opening and closing；
The relay array is electrically connected relay driver, and the relay driver is connect with micro-controller communications, institute
The pin for stating ECU electronic control unit also passes through A/D feed circuit and connect with the micro-controller communications, and the microcontroller passes through
CAN communication module is communicated with host computer.
2. automobile engine ECU test device according to claim 1, which is characterized in that the relay driver packet
It includes relay driving chip U1 and relay driving chip U2, the relay driving chip U1 and relay driving chip U2 is equal
Using MC1413BD, inside include 7 Darlington transistor arrays, A1-A7 is the microcontroller signal input tube foot, Y1-
Y7 is output pin；The input pin of the relay driving chip U1 is connect with the microcontroller signal, the relay
The output pin of driving chip U1 and the coil input end of relay switch are electrically connected；The relay driving chip U2's is defeated
The coil input end of pin communication connection relay switch K7, relay switch K8 out, the relay driving chip U2 input
Pin communication connects the pin of the microcontroller.
3. automobile engine ECU test device according to claim 2, which is characterized in that the microcontroller uses
MC9S12HY64VLL comprising have 64 pins, 1 road CAN, 28 bit timing devices, 8 channels 10 channels AD, the AD is logical
Road and the A/D feed circuit communicate to connect, the A1- of the pin 76-81 and pin 37 and the relay driving chip U1
A1, A2 pin of the communication connection of A7 pin, the pin 88, pin 87 and the relay driving chip U2 communicate to connect, institute
It states microcontroller and the CAN communication module is connected by CAN communication interface signal.
4. automobile engine ECU test device according to claim 1, which is characterized in that the ECU electronic control unit and every
The connecting pin of faulty channel switching group described in item is also connected with fuse.
5. automobile engine ECU test device according to claim 1, which is characterized in that the I/O interface module difference
Communicate to connect sensor, driver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821993971.0U CN209070362U (en) | 2018-11-30 | 2018-11-30 | A kind of automobile engine ECU test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821993971.0U CN209070362U (en) | 2018-11-30 | 2018-11-30 | A kind of automobile engine ECU test device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110502430A (en) * | 2019-07-12 | 2019-11-26 | 北京祥远通达科技有限公司 | A kind of automobile electric control unit flexibility HIL test center and test method |
| CN111487062A (en) * | 2020-04-21 | 2020-08-04 | 东风汽车集团有限公司 | Throttle valve automatic calibration system and method based on hardware-in-the-loop |
| CN115857466A (en) * | 2022-11-24 | 2023-03-28 | 天津经纬恒润科技有限公司 | Controller test system |
-
2018
- 2018-11-30 CN CN201821993971.0U patent/CN209070362U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110502430A (en) * | 2019-07-12 | 2019-11-26 | 北京祥远通达科技有限公司 | A kind of automobile electric control unit flexibility HIL test center and test method |
| CN110502430B (en) * | 2019-07-12 | 2023-06-02 | 北京祥远通达科技有限公司 | Flexible HIL test center and test method for vehicle electronic control unit |
| CN111487062A (en) * | 2020-04-21 | 2020-08-04 | 东风汽车集团有限公司 | Throttle valve automatic calibration system and method based on hardware-in-the-loop |
| CN115857466A (en) * | 2022-11-24 | 2023-03-28 | 天津经纬恒润科技有限公司 | Controller test system |
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