CN2136980Y - Portable test instrument for engine of vehicle - Google Patents
Portable test instrument for engine of vehicle Download PDFInfo
- Publication number
- CN2136980Y CN2136980Y CN 92206786 CN92206786U CN2136980Y CN 2136980 Y CN2136980 Y CN 2136980Y CN 92206786 CN92206786 CN 92206786 CN 92206786 U CN92206786 U CN 92206786U CN 2136980 Y CN2136980 Y CN 2136980Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- vehicle
- engine
- test instrument
- utility
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Testing Of Engines (AREA)
Abstract
The utility model discloses an improved test instrument for an engine of a vehicle which improves the existing test instrument for the engine of the vehicle at home and abroad utilizing the modern electronic technology and better satisfies the maintaining vehicle personnel's need of adjusting and testing the engine of the vehicle and failure diagnosis. The utility model is characterized in that the test instrument is provided with a circuit which can detect the peak voltage of the ignition coil of the vehicle to judge the ignition failure, a special low-voltage stabilizing circuit for stabilizing the precision and an automatic turn-off circuit for preventing from forgetting to turn off the power switch. The utility model has the advantages of high reliability, low cost and many measurement items.
Description
The utility model is to utilize a kind of innovative product of modern electronic technology to current domestic and international similar automotive engine test instrument, can satisfy automobile better and use the needs to motor car engine adjustment, test and fault diagnosis with the maintenance personal.
Current domestic and international similar instrument has two big classes, and a kind of is that analog (pointer instrument) another kind is digital, earlier this two classes instrument is compared before development.Though digital instrument is smart higher, but rotating speed is unsettled when engine has fault, numeral shows back two be difficult to stablely read (being generally four demonstrations) and can not give full play to the high advantage of its precision, and its cost is more than three times of pointer instrument, inconvenient penetration and promotion.As the SZT-01 type that homemade Shanghai rotating speed Watch Factory goes out, the EA-866C type that Japan produces.Cost is lower so the utility model adopts, the pointer instrument of applicable surface broad.
Traditional pointer instrument does not adopt electronic circuit, is the waveform of self is realized rotating speed and dwell angle when relying on the outage of automobile platinum by Resistor-Capacitor Unit measurement.Waveform can become and is directed at measuring accuracy and reduces when there is fault in igniting system.As homemade grand celebration QJ-2 type, Britain produces the B8.63 type.Though some has adopted the electronics shaping circuit,, also influenced measuring accuracy owing to used the bigger power supply of this change in voltage amplitude of dry cell.As the DTV-11 type that Japan produces, produced in USA-Accutune 745 types.
The purpose of this utility model is to utilize a kind of not only economy and durability of modern electronic technology design but also lasting accuracy is arranged and the portable apparatus of more measurement project, better meets the needs of automobile service personnel to motor car engine adjustment, test and fault diagnosis.
In the car engine machine testing, at first to get rid of fault, ignition failure, just might judge mechanical fault then by instrument.So the utility model is one of unusual to be to have designed an ignition coil crest voltage testing circuit (by D
5, T
9And relevant Resistor-Capacitor Unit composition) measures spark intensity.In conjunction with the measurement of platinum contact pressure drop, circuit and ignition failure are at first got rid of in electricity and voltage measurement etc. again.Then carry out other measurement successively.The utility model is in order to solve the big problem of dry cell change in voltage, designed one to the special preferably mu balanced circuit of low pressure (3V) voltage regulation result, it has utilized voltage stabilizing diode breakdown characteristics flex point change resistance characteristic partly, trustworthy diode is considered as a rheostat spare in circuit, reached than usually with its steady characteristic voltage regulation result preferably.This part is by DW2, T
5, T
7And RW
8, R
12Deng composition.In order to prevent to forget to close the battery consumption that power switch causes, the utility model has also designed by D
8, T
6, T
8And the automatic switching circuit formed of relevant Resistor-Capacitor Unit, insert test signal after 1-2 power supply second connect automatically, remove test signal after 20-40 power supply second automatically shut down.Make a 6V packed cell can use half a year like this.
The utility model is owing to adopted above-mentioned major technique measure, instrument is become at following similar individual event of lower cost or several test instrumentations can be to car engine machine circuit, igniting system and the differentiation of more mechanical fault and the integral test system of judgement, and the user can carry out 20 according to the process of measurement of operation instructions introduction successively and detect and fault diagnosis.Can reach better meet automobile use with the maintenance personal to motor car engine adjust, the purpose of test and fault diagnosis.
The utility model is a kind of portable vehicle Engine Block Test instrument, and its circuit is mainly by T
1, T
2The schmitt trigger of forming, T
3, T
4The monostable circuit of forming and by R
20-R
22And electric and voltage and drop measurement circuit that pointer header M forms constitute.It is characterized in that having increased by D
5, T
9The ignition coil crest voltage testing circuit of forming is by DW
2, T
5, T
7The special mu balanced circuit of forming is by D
8, T
8, T
6The automatic switching circuit of forming.
Circuit description: circuit of the present utility model is made up of following six parts
1, by D
1-D
4Form the impulse commutation circuit, by R
1, DW
1Form limiter protection circuit, by R
2, C
1Form anti-high-frequency interferencing circuit.
2, by T
1, T
2, R
3-R
7, RW
1, C
2Form schmitt trigger, mainly play shaping and form the dwell angle metering circuit with gauge outfit M.
3, by T
3, T
4, R
8-11, RW
2-RW
7And C
5Form the tachometric survey circuit that monostalbe trigger and gauge outfit M form variant range.
4, by T
9, D
5, C
10, RW
9, R
17-R
23, D
6, D
7And gauge outfit M forms voltage and the crest voltage testing circuit is used for carrying out ignition coil crest voltage and circuit voltage and voltage drop measurement, wherein D
6, D
7Play the limited amplitude protection gauge outfit.
5, by T
5, T
7, DW
2, DW
8, R
12Form the special mu balanced circuit of low pressure that utilizes voltage stabilizing diode to become the resistance characteristic.
6, by T
6, T
8, D
8, C
6-C
9And R
13-R
16Form power automatic switch circuit, in order to prevent to forget to close the battery waste that power supply causes.
Claims (1)
- The utility model is a kind of portable vehicle Engine Block Test instrument, is by T 1, T 2The schmitt trigger of forming, T 3, T 4The monostable circuit of forming and by R 20, R 21, R 22And the battery voltage of pointer instrument composition and drop measurement circuit formation, it is characterized in that having increased by D 5, T 9The ignition coil peak detection circuit of forming is by DW 2, T 5, T 7The special mu balanced circuit of forming is by D 8, T 8, T 6The automatic switching circuit of forming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92206786 CN2136980Y (en) | 1992-04-17 | 1992-04-17 | Portable test instrument for engine of vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92206786 CN2136980Y (en) | 1992-04-17 | 1992-04-17 | Portable test instrument for engine of vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2136980Y true CN2136980Y (en) | 1993-06-23 |
Family
ID=33762051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92206786 Expired - Fee Related CN2136980Y (en) | 1992-04-17 | 1992-04-17 | Portable test instrument for engine of vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2136980Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101761408A (en) * | 2010-03-04 | 2010-06-30 | 霸州市华威发动机技术有限公司 | Portable multifunctional manual operator of vehicle engine |
-
1992
- 1992-04-17 CN CN 92206786 patent/CN2136980Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101761408A (en) * | 2010-03-04 | 2010-06-30 | 霸州市华威发动机技术有限公司 | Portable multifunctional manual operator of vehicle engine |
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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 |