CN205333319U - Automobile engine fault detection device - Google Patents
Automobile engine fault detection device Download PDFInfo
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- CN205333319U CN205333319U CN201620054244.2U CN201620054244U CN205333319U CN 205333319 U CN205333319 U CN 205333319U CN 201620054244 U CN201620054244 U CN 201620054244U CN 205333319 U CN205333319 U CN 205333319U
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- automobile engine
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- flexray
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Abstract
The utility model discloses an automobile engine fault detection device, it includes the controller, and double - circuit flexRay bus transceiver circuit passes through the flexRay interface and controler to be connected, and simulation level sensor unit passes through the AD interface and controler to be connected, and digital level sensor unit passes through the ECT interface and controler and connects, the problem of prior art's automobile engine fault detection mainly adopt the description that the driver broke down to driving in -process engine, detect the engine through computer and special test appearance, the automobile engine troubleshooting of existence is with high costs, it is long to consume man -hour, has the trouble hourglass and examines, seriously influences techniques such as driving safety is solved.
Description
Technical field
This utility model belongs to intelligent automobile technical field, particularly relates to a kind of automobile engine failure detector。
Background technology
Automobile engine is the power set of running car, automobile engine is as the heart of automobile, its structure is complicated, parts are many, work under bad environment, is be easier to one of position of breaking down in automobile, and the performance of electromotor is the key factor of the performance determining automobile。When automotive electronic control system system malfunctions, if these faults can not find in time and get rid of, it is easy to have influence on the safety even entail dangers to life security to driver and passenger of running car；The method of conventional process engine failure is the description that electromotor in driving conditions is broken down by auto repair personnel according to driver, by computer and dedicated tester, electromotor is detected, especially to transient faults more occurrent in engine operation process and hidden failure, these faults but not easily find when overhauling after vehicle lay-off, cause that the automobile engine trouble shooting cost of prior art is high, expend man-hour long, and there is fault missing inspection, have a strong impact on traffic safety etc.。
Utility model content
The technical problems to be solved in the utility model: a kind of automobile engine failure detector is provided, automobile engine fault detect to solve prior art mainly adopts the description that electromotor in driving conditions is broken down by driver, by computer and dedicated tester, electromotor is detected, the automobile engine trouble shooting cost existed is high, expend man-hour long, there is fault missing inspection, have a strong impact on the technical problems such as traffic safety。
Technical solutions of the utility model:
A kind of automobile engine failure detector, it includes controller, two-way FlexRay bus transceiver circuit is connected by FlexRay Interface and Controler, and analog sensor unit is connected by AD Interface and Controler, and digital sensors unit is connected by ECT Interface and Controler。
Controller is also connected with RS232 communication module, BDM debugging interface, memorizer SD card module, liquid crystal display module, real-time clock and buzzer；Power module input is connected with Vehicular accumulator cell, outfan is connected with controller, two-way FlexRay bus transceiver circuit, memorizer SD card module, liquid crystal display module and buzzer, and described controller is 16 single-chip microcomputer MC9S12XF512 of FreeScale company。
Described analog sensor unit and digital sensors unit include: intake manifold pressure sensor, crank position and speed probe, throttle position detection sensor, intake air temperature and cooling-water temperature transmitter, detonation sensor and oxygen sensor。
The beneficial effects of the utility model:
This utility model overcomes the shortcoming of prior art, adopts integrated technical scheme, it is possible to meet to cost, board space, stability requirement；Transmission employs FlexRay bus communication, achieve two-forty, low-power consumption, and price is relatively inexpensive, meet the collection of automobile electrically-controlled electromotor operation information, record and analysis requirement, it is possible to help the ruuning situation of driver or auto repair personnel's labor automotive electronic control system system；This utility model have employed microcontroller as processor, take full advantage of multiple independent bus line interfaces of microcontroller, all chips have employed surface mount elements, volume is only small, transfer rate is high, capacity of resisting disturbance and anti-vibration ability are strong, and external EBI can be extended according to specific needs。
Fault incidental in automotive electronic control system system can be analyzed by this utility model running according to the diagnosis rule set, breakdown judge is provided when breaking down, and automatic alarm, demonstrate the type that breaks down, it is possible to help driver to analyze and process simple fault well simultaneously；Information having detailed record and storage, it is possible at non-operating state, fault is displayed in fault generating process, these data can meet the research worker fault to engine electric-controlled system and reproduce and analyze, and are also convenient for maintainer and process；Solve the description that the automobile engine fault detect of prior art mainly adopts driver that electromotor in driving conditions is broken down, by computer and dedicated tester, electromotor is detected, the automobile engine trouble shooting cost existed is high, expend man-hour long, there is fault missing inspection, have a strong impact on the technical problems such as traffic safety。
Accompanying drawing explanation
Fig. 1 this utility model structural representation。
Detailed description of the invention
A kind of automobile engine failure detector, it includes controller, two-way FlexRay bus transceiver circuit is connected by FlexRay Interface and Controler, and analog sensor unit is connected by AD Interface and Controler, and digital sensors unit is connected by ECT Interface and Controler。
Two-way FlexRay bus transceiver circuit connects electric-control system FlexRay bus, receives the information of electric-control system FlexRay bus。
AD interface primary recipient sensor die analog quantity signal。
ECT interface sensor high-speed pulse signal。
Controller is also connected with RS232 communication module, BDM debugging interface, memorizer SD card module, liquid crystal display module, real-time clock and buzzer；Power module input is connected with Vehicular accumulator cell, outfan is connected with controller, two-way FlexRay bus transceiver circuit, memorizer SD card module, liquid crystal display module and buzzer, and described controller is 16 8-digit microcontroller single-chip microcomputer MC9S12XF512 of FreeScale company。
The integrated AD interface of described controller has the analog-digital converter of 16 passages of 8/10/12 respectively；
ECT interface has the enhancement mode of 16 of 8 passages to catch intervalometer。
Described analog sensor unit and digital sensors unit include: intake manifold pressure sensor, crank position and speed probe, throttle position detection sensor, intake air temperature and cooling-water temperature transmitter, detonation sensor and oxygen sensor。
Work process of the present utility model is realized by software program, software program is divided into system initialization module program, outage condition by the present embodiment, performs interrupt task program, major cycle modular program, FlexRay interface interrupt program, AD interface interrupt program, ECT interface interrupt program；First run system initialization module program, then according to interrupting judging, if interrupt condition is unsatisfactory for, then run major cycle modular program always, return after having run and interrupt judging；If interrupting Rule of judgment to meet, then performing interrupt routine, major cycle modular program stops, and returns and interrupts determining program, circulate always after having performed interrupt routine；Interrupt routine is mainly just carried out: when any one meets interrupt condition in FlexRay transceiver circuit, AD collection analog signals and this three of pulse capture, all jumping into corresponding interrupt routine and perform, major cycle modular program temporarily ceases。
Concrete detection method is as follows:
It includes:
Step 1, operation system initialization module program；
Step 2, outage condition, perform interrupt task；
Step 3, operation major cycle modular program；
Step 4, operation FlexRay interface interrupt program；
Step 5, operation AD interface interrupt program；
Step 6, operation ECT interface interrupt program。
Operation system initialization module program described in step 1, it includes:
Step 1.1, A single-chip microcomputer initialize；
Step 1.2, judging whether SD card exists, SD card exists, then SD card carries out fat32 file initialization, and SD card is set as storage medium；SD card is absent from, then set buzzer warning and show that storage medium is absent from by LCDs；
Step 1.3, FlexRay communication module initial configuration；
Step 1.4, AD analog digital conversion Initialize installation；
Step 1.5, initialization ECT；
Step 1.6, LCDs Initialize installation；
Step 1.7, arrange real-time clock initialize；
Step 1.8, initialize automotive electronic control system system diagnosis rule；
Step 1.9, setting automotive electronic control system system information retrieval scope in non-faulting situation。
Outage condition described in step 2, the operation method performing interrupt task is: when FlexRay EBI, AD interface or ECT interface have signal to transmit, namely perform interruption, receive engine electric-controlled system data parameters, and store in corresponding controller cache。
It includes to run major cycle modular program described in step 3:
Step 3.1, the data message read in each corresponding buffer memory that FlexRay interface, AD interface and ECT interface receive；
The data message that step 3.2, basis read, it may be judged whether have fault to occur；
Step 3.3, storage that data message and fault message are packed。
In step 3.2, if there being fault to occur, according to diagnosis rule, the seriousness of fault analysis and judgement, if beyond the normal parameter area set, being then judged as catastrophe failure, showing catastrophe failure on a display screen, regulating PWM simultaneously and making buzzer send rapid sound；If according to diagnosis rule, it can be determined that go out set fault type, then show fault type title on a display screen, regulate PWM simultaneously and make buzzer send general alarm sound；It is title further according to current time, data is all packaged into the file format in SD card, and sequential storage is in SD card；The data of these storages be in order to automobile when non-operating state research worker to the reproduction of the fault in automotive electronic control system system driving process and analysis；
In step 3.2, occur without fault, then according to the extraction scope of the automotive electronic control system system of setting important information in non-faulting situation in system initialization module program, the data extracted filter out important information, and with current time for name, being packaged in SD card the type sequence of file stores in SD card, in order to automobile when non-operating state research worker to the reproduction of the running status of automobile and reduction。
Having used two FlexRay bus transceivers in FlexRay interface interrupt program, the two is also at different triggering modes, respectively Time Triggered and event triggered fashion, and both triggering modes are different, but the main step included is almost identical。
Running FlexRay interface interrupt program described in step 4, it includes:
Step 4.1, receive the FlexRay interface interrupt program that enters after FlexRay bus data；
Step 4.2, operation FlexRay bus control unit, control FlexRay bus transceiver and receive the data message of some time slot；
Step 4.3, the data that FlexRay bus transceiver receives are stored in the corresponding buffer memory within controller；
Step 4.4, removing are interrupted and exit。
Running AD interface interrupt program described in step 5, it includes:
Step 5.1, read the analog signals of analog sensor unit and be AD converted, being converted to digital quantity signal；
Step 5.2, by conversion after digital quantity signal carry out converting to the numerical value of analogue signal again；
The numerical value of analogue signal is stored in controller inner buffer by C；
D removes interrupt flag bit and exits。
Running ECT interface interrupt program described in step 6, it includes:
When step 6.1, the pulse signal received are detected rising edge, start ECT work；
Step 6.2, reading current timer numerical value；
Step 6.3, signal calculated cycle；
Step 6.4, is put into the internal corresponding buffer memory of controller each channel signal cycle；
Step 6.5, removing interrupt identification also exit。
The diagnosis rule set includes with lower part:
The leakage of gas handling system fault, gas handling system or aerofluxus blocking, throttle fault, failure of fuel system, injector failures, fuel system pharmacology are too low or too high, ignition failure, ignition module fault, spark plug, cylinder line fault, main sensors fault and egr system fault etc.。
Important information in above-mentioned setting non-faulting situation extracts scope and includes: current time, the camshaft location of cylinder, crank position, engine speed, intake pipe absolute pressure, MAF, cooling water temperature, intake air temperature, throttle position, detonating signal, exhaust gas oxygen, exhaust gas recirculation rate, fuel pump voltage, engine start holder rotaring signal and speed etc.。
Claims (3)
1. an automobile engine failure detector, it includes controller, it is characterized in that: two-way FlexRay bus transceiver circuit is connected by FlexRay Interface and Controler, analog sensor unit is connected by AD Interface and Controler, and digital sensors unit is connected by ECT Interface and Controler。
2. a kind of automobile engine failure detector according to claim 1, it is characterised in that: controller is also connected with RS232 communication module, BDM debugging interface, memorizer SD card module, liquid crystal display module, real-time clock and buzzer；Power module input is connected with Vehicular accumulator cell, outfan is connected with controller, two-way FlexRay bus transceiver circuit, memorizer SD card module, liquid crystal display module and buzzer, and described controller is 16 single-chip microcomputer MC9S12XF512 of FreeScale company。
3. a kind of automobile engine failure detector according to claim 1, it is characterised in that: described analog sensor unit and digital sensors unit include: intake manifold pressure sensor, crank position and speed probe, throttle position detection sensor, intake air temperature and cooling-water temperature transmitter, detonation sensor and oxygen sensor。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620054244.2U CN205333319U (en) | 2016-01-20 | 2016-01-20 | Automobile engine fault detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620054244.2U CN205333319U (en) | 2016-01-20 | 2016-01-20 | Automobile engine fault detection device |
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| Publication Number | Publication Date |
|---|---|
| CN205333319U true CN205333319U (en) | 2016-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620054244.2U Expired - Fee Related CN205333319U (en) | 2016-01-20 | 2016-01-20 | Automobile engine fault detection device |
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| CN (1) | CN205333319U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486513A (en) * | 2016-01-20 | 2016-04-13 | 贵州师范大学 | Automobile engine fault detection device and detection method |
| CN108051223A (en) * | 2017-09-30 | 2018-05-18 | 河北华北柴油机有限责任公司 | A kind of engine low pressure oil way monitoring system and monitoring method |
| CN112805547A (en) * | 2018-12-04 | 2021-05-14 | 宝马股份公司 | Method for reproducing a fault occurring during the driving operation of a vehicle |
| CN112805547B (en) * | 2018-12-04 | 2024-06-04 | 宝马股份公司 | Method for reproducing a fault occurring during a driving operation of a vehicle |
-
2016
- 2016-01-20 CN CN201620054244.2U patent/CN205333319U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486513A (en) * | 2016-01-20 | 2016-04-13 | 贵州师范大学 | Automobile engine fault detection device and detection method |
| CN108051223A (en) * | 2017-09-30 | 2018-05-18 | 河北华北柴油机有限责任公司 | A kind of engine low pressure oil way monitoring system and monitoring method |
| CN112805547A (en) * | 2018-12-04 | 2021-05-14 | 宝马股份公司 | Method for reproducing a fault occurring during the driving operation of a vehicle |
| CN112805547B (en) * | 2018-12-04 | 2024-06-04 | 宝马股份公司 | Method for reproducing a fault occurring during a driving operation of a vehicle |
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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: 20160622 Termination date: 20180120 |