CN202548268U - Automobile engine harness diagnostic apparatus - Google Patents
Automobile engine harness diagnostic apparatus Download PDFInfo
- Publication number
- CN202548268U CN202548268U CN2012201331578U CN201220133157U CN202548268U CN 202548268 U CN202548268 U CN 202548268U CN 2012201331578 U CN2012201331578 U CN 2012201331578U CN 201220133157 U CN201220133157 U CN 201220133157U CN 202548268 U CN202548268 U CN 202548268U
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- wire harness
- motor car
- interface
- car engine
- pin
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Abstract
The utility model discloses an automobile engine harness diagnostic apparatus. The diagnostic apparatus is characterized in that the diagnostic apparatus comprises a singlechip, a nonvolatile memory, a display screen, a parallel-to-serial conversion chip, a serial-to-parallel conversion chip, a harness interface I and a harness interface II, wherein the singlechip sends a detection signal to each pin of the harness interface II from the output end via the serial-to-parallel conversion chip and obtains a feedback signal of each pin of the harness interface I from the input end via the parallel-to-serial conversion chip, then a schematic diagram of the automobile engine harness to be detected in the nonvolatile memory is called in and the fault conditions of the automobile engine harness to be detected are displayed on the display screen. The diagnostic apparatus has the advantages of convenience in use, time saving and efficiency improvement.
Description
Technical field
The utility model relates to a kind of trouble-shooter of automotive electronics.
Background technology
Automotive wire bundle is used for connecting each electrical and electronic parts of automobile and makes it to bring into play function.
Engine wiring harness is a most important parts in the automotive wire bundle, and it couples together each sensor (like pressure transducer), actuator (like fuel injector) and engine controller, with control ignition, oil spout etc., lets normal working of engine.
Common one four cylinder BBG has dozens of sensor and actuator, and each sensor and actuator have 2～6 pins again, and therefore an engine wiring harness is made up of tens of～up to a hundred circuits usually.
Engine wiring harness is followed the change of vehicle model and is changed.When engine wiring harness breaks down, (open circuit or short circuit like certain bar circuit), existing diagnostic method is one one ground investigation of schematic diagram that the maintenance personal uses this engine wiring harness of multimeter contrast, very time-consuming and inefficiency.
Therefore,, lost efficacy for certain sensor that is connected with engine controller or actuator after sale the time at automobile, this sensor or actuator are often at first changed in the maintenance station, if fault occurs again, then confirm it is that engine wiring harness goes wrong after a period of time of going.Concrete problem circuit can time-consumingly not searched arduously in the maintenance station yet, but changes the whole piece engine wiring harness.This makes that maintenance cost is higher, the cycle is long and has potential safety hazard.
The utility model content
The utility model technical matters to be solved provides a kind of device whether every circuit in the motor car engine wire harness is normally diagnosed quickly and accurately.
For solving the problems of the technologies described above, the utility model motor car engine wire harness diagnostic equipment comprises single-chip microcomputer, nonvolatile memory, display screen and goes here and there conversion chip, string and conversion chip, wire harness interface one, wire harness interface two;
Each input end of said single-chip microcomputer all connects one and go here and there conversion chip, and also goes here and there conversion chip rat tail interface one through these; Each output terminal of said single-chip microcomputer all connects a string and conversion chip, and through these string and conversion chip rat tail interface two; Said single-chip microcomputer also connects nonvolatile memory and display screen;
The pin of said wire harness interface one has comprised an end of all circuits of motor car engine wire harness to be detected; The pin of said wire harness interface two has comprised the other end of all circuits of motor car engine wire harness to be detected; The two ends of motor car engine wire harness to be detected are rat tail interface one and wire harness interface two respectively;
The output terminal of said single-chip microcomputer sends detection signal through string and conversion chip to each pin of wire harness interface two; And through and go here and there conversion chip and obtain the feedback signal of each pin of wire harness interface one from input end; Transfer the schematic diagram of the motor car engine wire harness to be detected in the nonvolatile memory again, on display screen, show the fault state of motor car engine wire harness to be detected.
Further, every pin of said wire harness interface one is corresponding to an end of all circuits of motor car engine wire harness to be detected; Said wire harness interface two every pin are corresponding to the other end of all circuits of motor car engine wire harness to be detected.
Further, motor car engine wire harness diagnostic equipment also comprises button, and the user is through the model of this button input or selection automobile model or motor car engine wire harness.
Further, said display screen and button unification replace with touch-screen.
The utility model motor car engine wire harness diagnostic equipment has advantage easy-to-use, that save time, raise the efficiency.Only need will engine wiring harness to be detected two ends get involved this diagnostic equipment, and the input vehicle numbers, this diagnostic equipment just can automatic diagnosis wire harness problem, and on display screen, informs fault type and related circuit number.Whole diagnostic procedure is accurately quick, has practiced thrift the time of artificial single line road investigation greatly.
Description of drawings
Fig. 1 is the structural representation of first embodiment of the utility model motor car engine wire harness diagnostic equipment;
Fig. 2 is the structural representation of second embodiment of the utility model motor car engine wire harness diagnostic equipment;
Fig. 3 is the structural representation of the 3rd embodiment of the utility model motor car engine wire harness diagnostic equipment.
Description of reference numerals among the figure:
11 is single-chip microcomputer; 12 is nonvolatile memory; 13 is display screen; 14 is button; 15 is touch-screen; 21 are and the string conversion chip; 22 are string and conversion chip; 31 is wire harness one end interface; 32 is wire harness other end interface;
Embodiment
See also Fig. 1; This is first embodiment of the utility model motor car engine wire harness diagnostic equipment, and it comprises single-chip microcomputer 11, nonvolatile memory 12, display screen 13 and goes here and there conversion chip 21, string and conversion chip 22, wire harness one end interface 31, wire harness other end interface 32.
The input end of said single-chip microcomputer 11 is one or more, and each input end all connects one and go here and there conversion chip 21, and these also go here and there conversion chip 21 rat tail one end interface 31 again.
The output terminal of said single-chip microcomputer 11 also is one or more, and each output terminal all connects a string and conversion chip 22, and these strings and conversion chip 22 be rat tail other end interface 32 again.
Said single-chip microcomputer 11 sends detection signal through output terminal and string and conversion chip 22 to each pin of wire harness other end interface 32, and through and go here and there conversion chip 21 and input end and obtain the feedback signal of each pin of wire harness one end interface 31.
Said single-chip microcomputer 11 also connects nonvolatile memory 12.It transfers the schematic diagram of motor car engine wire harness from nonvolatile memory 12, promptly each the root circuit in the engine wiring harness is corresponding to which pin in wire harness one end interface 31 and corresponding to which pin in the wire harness other end interface 32.
Said single-chip microcomputer 11 also connects display screen 13.It shows on display screen 13 whether motor car engine wire harness to be detected is normal, any fault occurred if which root circuit is out of order words are, fault type generally comprises short circuit and opens circuit two kinds.
Said nonvolatile memory 12 for example is EEPROM; It stores the schematic diagram of motor car engine wire harness to be detected, and promptly each the root circuit in the engine wiring harness is corresponding to which pin in wire harness one end interface 31 and corresponding to which pin in the wire harness other end interface 32.
Said and string conversion chip 21 is carried out the conversion of parallel signal to serial signal, and said string and conversion chip 22 are carried out the conversion of serial signal to parallel signal.Because because motor car engine wire harness to be detected generally includes tens of～up to a hundred circuits; And the number of pins of single-chip microcomputer 11 is often so not many; Thereby the more link tester of motor car engine wire harness is parallel excessively---the bi-directional conversion of serial is connected on the less pin of single-chip microcomputer 11.For example; Comprise 80 circuits in the motor car engine wire harness to be detected; And the pin that single-chip microcomputer 11 can be used for importing only has 10, and the pin that can be used for exporting also only has 10, can adopt this moment parallel 21,10 one tunnel serials of chip of changeing one tunnel serial of 10 octuples to change the parallel chip 22 of octuple.
Said wire harness one end interface 31 for example is the interface that motor car engine wire harness to be detected connects that end of engine controller; The number of pins of this interface 31 has comprised all circuits in the motor car engine wire harness to be detected, and under preferable case, equates with it.
Said wire harness other end interface 32 for example is the interface that automobile engine line to be detected connects that end of each sensor and actuator; In fact this interface 32 is divided into the little interface of respective amount according to the quantity of sensor and actuator, each little interface comprises one or more pin.But total number of pins of these little interfaces has comprised all circuits in the motor car engine wire harness to be detected, and under preferable case, equates with it.
The two ends of motor car engine wire harness to be detected are above-mentioned wire harness one end interface 31 and wire harness other end interface 32 of rat tail respectively.Said wire harness interface 31,32 can transposition in this motor car engine wire harness diagnostic equipment.
The motor car engine wire harness diagnostic equipment that above-mentioned first embodiment is appeared, in use, with the two ends difference rat tail interface 31,32 of motor car engine wire harness to be detected.The output terminal of single-chip microcomputer 11 sends detection signal through string and conversion chip 22 each pin (transmission pin) in wire harness interface 32 then; For example be high level signal, and through and string conversion chip 21 receive the feedback signal of each pin in the wire harness interface 31 by input end.Said feedback signal and said detection signal are same signal.
This testing process has following several kinds of situation:
First kind of situation do not have pin to receive feedback signal in the interface 31.This shows that open circuit fault takes place on that single line road of sending in the motor car engine wire harness to be detected that pin connected.
Second kind of situation has two above pins (reception pin) to receive feedback signal in the interface 31.This shows failed because between that single line road of sending in the motor car engine wire harness to be detected that pin connected and reception that several threads road that pin was connected.
The third situation has and only has a pin (reception pin) to receive feedback signal in the interface 31, and the transmission pin is used for being connected the single line road with the reception pin in the schematic diagram of the motor car engine wire harness to be detected that nonvolatile memory 12 is stored.This shows that this root circuit is normal.
The 4th kind of situation; Have and only have a pin (reception pin) to receive feedback signal in the interface 31, and the transmission pin is not to be used for being connected the single line bundle with receiving pin in the schematic diagram of the motor car engine wire harness to be detected that nonvolatile memory 12 is stored.This shows that open circuit fault has taken place on that single line road of sending in the motor car engine wire harness to be detected that pin connected, simultaneously also with receive failed because between that single line road that pin was connected.
In above-mentioned testing process or afterwards, single-chip microcomputer 11 is transferred the schematic diagram of motor car engine wire harness to be detected from nonvolatile memory 12, and on display screen 13, show diagnostic result.For example: the circuit generation open circuit fault that all circuits are all normal, be numbered x, the circuit y failed because in the lambda sensor ...
See also Fig. 2, this is second embodiment of the utility model motor car engine wire harness diagnostic equipment, and it has increased button 14 on the basis of first embodiment, and stores the schematic diagram of the automobile engine line of multiple different model in the nonvolatile memory 12.In use, the user is through the model of button 14 inputs or selection automobile model (its model with the motor car engine wire harness is corresponding one by one) or motor car engine wire harness, and all the other processes are identical with first embodiment.
See also Fig. 3, this is the 3rd embodiment of the utility model motor car engine wire harness diagnostic equipment, display screen 13 among second embodiment of its river and the button 14 unified touch-screens 15 that replace with.
More than be merely the preferred embodiment of the utility model, and be not used in qualification the utility model.For a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (4)
1. a motor car engine wire harness diagnostic equipment is characterized in that, comprises single-chip microcomputer, nonvolatile memory, display screen and goes here and there conversion chip, string and conversion chip, wire harness interface one, wire harness interface two;
Each input end of said single-chip microcomputer all connects one and go here and there conversion chip, and also goes here and there conversion chip rat tail interface one through these; Each output terminal of said single-chip microcomputer all connects a string and conversion chip, and through these string and conversion chip rat tail interface two; Said single-chip microcomputer also connects nonvolatile memory and display screen;
The pin of said wire harness interface one has comprised an end of all circuits of motor car engine wire harness to be detected; The pin of said wire harness interface two has comprised the other end of all circuits of motor car engine wire harness to be detected; The two ends of motor car engine wire harness to be detected are rat tail interface one and wire harness interface two respectively;
The output terminal of said single-chip microcomputer sends detection signal through string and conversion chip to each pin of wire harness interface two; And through and go here and there conversion chip and obtain the feedback signal of each pin of wire harness interface one from input end; Transfer the schematic diagram of the motor car engine wire harness to be detected in the nonvolatile memory again, on display screen, show the fault state of motor car engine wire harness to be detected.
2. motor car engine wire harness diagnostic equipment according to claim 1 is characterized in that every pin of said wire harness interface one is corresponding to an end of all circuits of motor car engine wire harness to be detected; Said wire harness interface two every pin are corresponding to the other end of all circuits of motor car engine wire harness to be detected.
3. motor car engine wire harness diagnostic equipment according to claim 1 is characterized in that, said motor car engine wire harness diagnostic equipment also comprises button, and the user is through the model of this button input or selection automobile model or motor car engine wire harness.
4. motor car engine wire harness diagnostic equipment according to claim 3 is characterized in that said display screen and button unification replace with touch-screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201331578U CN202548268U (en) | 2012-03-31 | 2012-03-31 | Automobile engine harness diagnostic apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201331578U CN202548268U (en) | 2012-03-31 | 2012-03-31 | Automobile engine harness diagnostic apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202548268U true CN202548268U (en) | 2012-11-21 |
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ID=47168884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201331578U Expired - Fee Related CN202548268U (en) | 2012-03-31 | 2012-03-31 | Automobile engine harness diagnostic apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202548268U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109387738A (en) * | 2018-12-14 | 2019-02-26 | 大连科技学院 | A kind of subway train debugging apparatus |
| CN112406744A (en) * | 2020-12-07 | 2021-02-26 | 安徽江淮汽车集团股份有限公司 | Method, device and equipment for detecting fire prevention of wire harness in engine compartment and storage medium |
-
2012
- 2012-03-31 CN CN2012201331578U patent/CN202548268U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109387738A (en) * | 2018-12-14 | 2019-02-26 | 大连科技学院 | A kind of subway train debugging apparatus |
| CN112406744A (en) * | 2020-12-07 | 2021-02-26 | 安徽江淮汽车集团股份有限公司 | Method, device and equipment for detecting fire prevention of wire harness in engine compartment and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121121 Termination date: 20190331 |