CN2398625Y - Fault diagnosis instrument for diesel engine fuel system - Google Patents
Fault diagnosis instrument for diesel engine fuel system Download PDFInfo
- Publication number
- CN2398625Y CN2398625Y CN 99222050 CN99222050U CN2398625Y CN 2398625 Y CN2398625 Y CN 2398625Y CN 99222050 CN99222050 CN 99222050 CN 99222050 U CN99222050 U CN 99222050U CN 2398625 Y CN2398625 Y CN 2398625Y
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Abstract
The utility model relates to a fault diagnosis instrument for a diesel engine fuel system. Parameters of a diesel engine can be measured by using the utility model; thereby, the running state of the diesel engine is further judged. The utility model comprises a pressure sensor and an amplification shaping conditioning circuit which are connected with each other, an output terminal of the conditioning circuit is connected with a center control circuit by an A/D converting circuit, and a data output terminal and a control terminal of the center control circuit are connected with a display circuit and a frequency flashing device. All measuring parameters can be output as LCD figures and numerical values by making use of an LCD display circuit of the utility model, so the strong visibility is realized. The precision of the utility model can reach to +/-1% because of the control of the center control circuit. In addition, the utility model has the advantages of high reliability, good repeatability, strong applicability, simple structure, low cost and portability.
Description
The utility model is a kind of Fault of Diesel Fuel System diagnostic equipment, belongs to a kind of mensuration diesel engine parameter, thereby further judges the Fault of Diesel Fuel System diagnostic equipment of its running status.
Diesel engine the time has the realtime power etc. of its oil pressure, fuel system fuel feeding phase place, fuel system high-voltage tube leakage problem, fuel system fuel injector duty and complete machine duty reflect diesel engine work state and master data in operation.To obtain these data and state in the past and need the bigger oscillograph of sensor, microcomputer and volume.Its overall volume is big, and the equipment cost height is not portable, also damages easily when moving, and particularly often will carry out at the scene the measurement of diesel engine, uses just very inconvenience of the said equipment, the bad reliability that also can influence the gained data of its wiring.
The purpose of this utility model is: design a kind of simple in structure, cost is low, volume is little, easy to operate, precision is high, reliable and portable Fault of Diesel Fuel System diagnostic equipment.
The utility model comprises pressure transducer and the amplification shaping modulate circuit that is attached thereto, and the output terminal of modulate circuit connects central control circuit by the A/D change-over circuit, and the data output end of central control circuit is connected with strobe apparatus with display circuit with control end.
Can adopt the amplification shaping modulate circuit of following structure in the utility model: it comprises amplifier and comparer 339 (IC05), the 8th pin of the output termination IC05 of pressure transducer also connects the input end of A/D change-over circuit by circuit, the 9th pin of IC05 connects an end of rheostat W1 and resistance R 15, the 9th pin of another termination Sheffer stroke gate IC06C of resistance R 15, the 14th pin of comparer IC05 connects the 10th pin of Sheffer stroke gate IC06C, and connect the 9th pin of Sheffer stroke gate IC06C, the output termination central control circuit of Sheffer stroke gate IC06C by resistance R 14.
In addition, the central control circuit in the utility model comprises CPU integrated package, latch and storer and power unit and clock part, and the P17 end of CPU connects stroboscope by resistance R 16.
And the display circuit in the utility model adopts the LCD display that is connected with central control circuit.
Utilize LCD display circuit of the present utility model whole measurement parameters can be exported with LCD figure, numerical value, visual strong.Since the control of central control circuit, precision of the present utility model can reach ± 1%.In addition, its reliability height, good reproducibility, adaptability is strong, and the utility model also has characteristics simple in structure, with low cost, portable.
Below in conjunction with accompanying drawing the utility model is elaborated.
Fig. 1 is the circuit diagram of central control circuit, power circuit and amplification and rectification circuit;
Present embodiment is made up of central control circuit, power circuit and pressure transducer, A/D change-over circuit and stroboscope, display.As shown in the figure, the central control circuit of present embodiment comprises the clock circuit composition that CPU ic chip 01, latch IC02, memory IC 03 and CPU are required, this part circuit and it are same as the prior art with being connected of power circuit, A/D change-over circuit IC04, repeat no more here.The amplification and rectification circuit of present embodiment comprises amplifier comparator ic chip 05, and the 8th pin of the output termination ic chip 05 of pressure transducer connects the end of rheostat W1 simultaneously, and the 8th pin of amplifier comparator IC05 connects the A/D change-over circuit.Meet adjustable resistance W1 between the 9th pin of IC05 and the ground wire, it also connects an input end---the 9th pin of Sheffer stroke gate IC06C by resistance R 15.The 14th pin of comparer IC05 connects another input end of Sheffer stroke gate IC06C---the 10th pin, and connects the 9th pin of Sheffer stroke gate IC06C by resistance R 14.The data input pin of the output termination CPU of Sheffer stroke gate IC06C.The power supply of amplifier comparator and provide by the system power supply circuit.
Claims (4)
1, a kind of Fault of Diesel Fuel System diagnostic equipment, it is characterized in that: it comprises pressure transducer and the amplification shaping modulate circuit that is attached thereto, the output terminal of modulate circuit connects central control circuit by the A/D change-over circuit, and central control circuit data output end and control end are connected with strobe apparatus with display circuit.
2, Fault of Diesel Fuel System diagnostic equipment according to claim 1, it is characterized in that: said amplification shaping modulate circuit comprises amplifier and comparer 339 (IC05), the 8th pin of the output termination IC05 of pressure transducer also connects the input end of A/D change-over circuit by circuit, the 9th pin of IC05 connects an end of rheostat W1 and resistance R 15, the 9th pin of another termination Sheffer stroke gate IC06C of resistance R 15, the 14th pin of comparer IC05 connects the 10th pin of Sheffer stroke gate IC06C, and connect the 9th pin of Sheffer stroke gate IC06C by resistance R 14, the output termination central control circuit of Sheffer stroke gate IC06C.
3, Fault of Diesel Fuel System diagnostic equipment according to claim 1 and 2, it is characterized in that: said central control circuit comprises CPU integrated package, latch and storer and power unit and clock part, and the P17 end of CPU connects stroboscope by resistance R 16.
4, Fault of Diesel Fuel System diagnostic equipment according to claim 1 and 2, it is characterized in that: said display circuit comprises the LCD display that is connected with central control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99222050 CN2398625Y (en) | 1999-08-20 | 1999-08-20 | Fault diagnosis instrument for diesel engine fuel system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99222050 CN2398625Y (en) | 1999-08-20 | 1999-08-20 | Fault diagnosis instrument for diesel engine fuel system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2398625Y true CN2398625Y (en) | 2000-09-27 |
Family
ID=34012513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99222050 Expired - Fee Related CN2398625Y (en) | 1999-08-20 | 1999-08-20 | Fault diagnosis instrument for diesel engine fuel system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2398625Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353542A (en) * | 2011-09-28 | 2012-02-15 | 沈阳黎明航空发动机(集团)有限责任公司 | Lubricant pump testing device for automatically measuring flow of aeroengine and control method thereof |
| CN104034369A (en) * | 2014-06-23 | 2014-09-10 | 康吉诺（北京）科技有限公司 | Fault diagnosis analyzer |
-
1999
- 1999-08-20 CN CN 99222050 patent/CN2398625Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353542A (en) * | 2011-09-28 | 2012-02-15 | 沈阳黎明航空发动机(集团)有限责任公司 | Lubricant pump testing device for automatically measuring flow of aeroengine and control method thereof |
| CN102353542B (en) * | 2011-09-28 | 2014-05-07 | 沈阳黎明航空发动机(集团)有限责任公司 | Lubricant pump testing device for automatically measuring flow of aeroengine and control method thereof |
| CN104034369A (en) * | 2014-06-23 | 2014-09-10 | 康吉诺（北京）科技有限公司 | Fault diagnosis analyzer |
| CN104034369B (en) * | 2014-06-23 | 2016-06-01 | 康吉诺（北京）科技有限公司 | A kind of Analysis on Fault Diagnosis instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |