CN2374652Y - Electrically-controlled cutoff and engine oil underpressure protector for diesel engine - Google Patents
Electrically-controlled cutoff and engine oil underpressure protector for diesel engine Download PDFInfo
- Publication number
- CN2374652Y CN2374652Y CN 99220452 CN99220452U CN2374652Y CN 2374652 Y CN2374652 Y CN 2374652Y CN 99220452 CN99220452 CN 99220452 CN 99220452 U CN99220452 U CN 99220452U CN 2374652 Y CN2374652 Y CN 2374652Y
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- signal amplification
- terminal
- amplification circuit
- diode
- electric lock
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Abstract
The utility model relates to a device which can stop diesel engines through electric control and can stop diesel engines when the pressure shortage of engine oil occurs. The utility model comprises a signal amplifying circuit for engine run, an electric lock switch, a signal amplifying circuit for judging the state of oil pressure, a first output signal amplifying circuit, a second output signal amplifying circuit, a control circuit, and an energizing circuit. One end of an electromagnetic coil is connected with the output terminals of the two output signal amplifying circuits, and the other end is contacted with the ground. A moving contact of an electric magnet is connected with a pull rod, and when the utility model is used, the pull rod is connected with an extinguishing arm of an oil injection pump. The utility model has the advantages of simple circuit structure, small size, convenient installation, and long service life.
Description
The utility model relates to the automatically controlled flame-out and machine oil of diesel engine makes the flame-out device of diesel engine when under-voltage.
The flame-out mode of at present general diesel engine for automobile, the overwhelming majority adopts manual control flame-out arm-type, in use, forgets after the frame person of sailing is often flame-out and turn-offs electric lock, deenergization, its consequence is to cause the loss of the rapid wear and the electric energy of electrical apparatus for vehicle use, and operation is also inconvenient; When machine oil was under-voltage, the bearing shell of diesel engine will be subjected to badly damaged, even bag axle accident occurred.The patent No. is 98221050.7 diesel electric-controlled flame-out and machine oil under-voltage protection device, though the diesel engine in the time of realizing that the automatically controlled flame-out shutdown of diesel engine and machine oil are under-voltage by throw over switch is shut down, but its deficiency is: 1, complex structure, need install the diesel engine speed detector that constitutes by permanent magnet and the coil on permanent magnet additional, be not easy to install; 2, this protector is if be in flameout state for a long time, easily makes wherein electromagnet coil around bad, and working life is short.
The purpose of this utility model provides a kind of diesel electric-controlled flame-out and machine oil under-voltage protection device of simple in structure, easy for installation, long service life.
This diesel electric-controlled flame-out and machine oil under-voltage protection device comprises an electromagnet, with the pull bar that the moving contact of electromagnet is connected, its structural feature is also to comprise engine running signal amplification circuit, electric lock switch and oil pressure state judgement signal amplification circuit, first output signal amplification circuit, second output signal amplification circuit, control circuit and field circuit; The engine running signal amplification circuit comprises an amplifier, this amplifier input terminal by resistance-capacitance coupling be connected with the generator signal terminal, output terminal has two-way output, wherein one the tunnel judges that with electric lock switch and oil pressure state the output terminal of signal amplification circuit is connected, and another road is connected with the coil of second relay; Electric lock switch and oil pressure state judge that signal amplification circuit comprises an amplifier, this amplifier in has the two-way input, the resistance of wherein leading up to coupling starts terminal with electric lock and is connected, another road is connected with electric lock igniting terminal by the resistance coupling, this amplifier in also with between the alarm switch terminal is connected to the diode that forward is connected, and the output terminal of this amplifier is connected with first output signal amplification circuit; First output signal amplification circuit comprises a power amplifier, is connected to the coil of first relay between the output terminal of this power amplifier and the positive supply, the normally opened contact two ends of this relay, and an end is connected with positive supply, and the other end is connected with magnet spool; The other end ground connection of electromagnet coil, second output signal amplification circuit comprises a power amplifier, the input end of this power amplifier is connected, exports the coil the other end of termination second relay with control circuit, the normally opened contact two ends of second relay, one end is connected with positive supply, and the other end is connected with the non-grounding end of magnet spool; Control circuit comprises three branch roads, first branch road is serially connected with isolating diode, discharge resistance and the operation point adjustment diode that forward is connected successively between the input end of electric lock igniting terminal and second output signal amplification circuit, second branch road be above-mentioned isolating diode and discharge resistance be connected in series a little and be connected between the ground charge and discharge capacitance, the 3rd branch road is to be connected to catching diode between the output terminal of being connected in series a little of diode and electric lock switch and oil pressure state judgement signal amplification circuit is adjusted in above-mentioned discharge resistance and operation point; Field circuit is included in forward is connected between generator signal terminal and the generator voltage controller terminal diode, forward is connected between electric lock igniting terminal and generator voltage controller terminal diode, forward is connected between the non-grounding end of electromagnet coil and generator voltage controller terminal diode.
As the improvement to diesel electric-controlled flame-out and machine oil under-voltage protection device, the normally opened contact of first relay is connected with positive supply after being connected in series a current-limiting resistance again.
This diesel electric-controlled flame-out and machine oil under-voltage protection device; in use; pull bar connects the flame-out arm of Injection Pump; the signal output of generator signal terminal sending and receiving motor; alarm switch terminal switch taking alarm; electric lock igniting terminal connects the electric lock ignition wire, and electric lock starts terminal and connects electric lock startup line, and the generator voltage controller terminal connects voltage regulator.Its working principle is:
1, when motor is in non-operating condition, the output of generator no signal, the engine running signal amplification circuit is not worked, no-output, first output signal amplification circuit is because of no signal input no-output, no current in first relay coil, its normally opened contact is often opened, and second output signal amplification circuit is because of no positive supply no-output, also no current in second relay coil, its normally opened contact is often opened, therefore, because no positive source and no current, its moving contact is failure to actuate in the electromagnet coil, pull bar is motionless, makes the flame-out arm of Injection Pump be positioned at the fuel feeding position;
2, when motor is in operating condition,
A, normal, the electric lock ignition wire closure of engine oil pressure: engine oil pressure is normal, and alarm switch is earth-free; Electric lock ignition wire closure, electric lock switch and oil pressure state are judged signal amplification circuit work, its output terminal is a low potential, and at this moment, first output signal amplification circuit is not worked, no-output, second output signal amplification circuit is not worked under the effect of catching diode yet, no-output, as mentioned above, pull bar is motionless, and the flame-out arm of Injection Pump is in the fuel feeding position; At this moment, charge and discharge capacitance charging;
B, shutoff electric lock or machine oil are under-voltage: electric lock switch and oil pressure state judgement signal amplification circuit are not worked because of alarm switch ground connection, its output terminal is a high petential, at this moment, and the first output signal amplification circuit work, the normally opened contact closure of first relay, the power supply of connection electromagnet coil; At this moment, owing to be filled with voltage on the charge and discharge capacitance, make the second output signal amplification circuit work, the normally opened contact closure of one side second relay, connect the power supply of electromagnet coil, electric current is arranged in the electromagnet coil, under the situation of two-way positive supply power supply, this electric current is enough to make moving contact action, drives the pull bar displacement, the flame-out arm of Injection Pump is transferred to by the fuel feeding position stop for the position, engine stoping operation, charge and discharge capacitance begins discharge by discharge loop on the other hand, and after the discharge, second output signal amplification circuit quits work, the normally opened contact of second relay disconnects, at this moment, electromagnet coil only has the little electric current that closure produced of first relay normally open contact to keep moving contact not reset, directly cause engine stoping operation, first output signal amplification circuit quits work, the electromagnet moving contact resets, and the flame-out arm of Injection Pump is positioned at the fuel feeding position again, for startup next time of motor is prepared.
Because this diesel electric-controlled flame-out and machine oil under-voltage protection device has removed permanent magnet and the coil on the body forever, each amplification circuit only needs a spot of triode, diode, electric capacity, resistance and two relays, thereby circuit structure is simple, and volume is little, and is easy for installation; Again owing to after the moving contact of electromagnet inhaled, only have little electric current in coil, to flow through, thereby magnet spool can not make the long service life of this protector because of excess current burns out.
Accompanying drawing shows diesel electric-controlled flame-out and machine oil under-voltage protection device embodiment's circuit structure schematic diagram.
In the present embodiment, diesel electric-controlled flame-out and machine oil under-voltage protection device comprises an electromagnet 7, with the pull bar 8 that the moving contact of electromagnet 7 is connected, also comprise engine running signal amplification circuit 1, electric lock switch and oil pressure state judgement signal amplification circuit 2, first output signal amplification circuit 3, second output signal amplification circuit 4, control circuit 5 and field circuit 6; Engine running signal amplification circuit 1 comprises an amplifier BG
4, this amplifier BG
4Input end by resistance-capacitance coupling C
1, R
8Be connected with generator signal terminal N, output terminal has two-way output, wherein one the tunnel is connected another road and the second relay J D with the output terminal of electric lock switch and oil pressure state judgement signal amplification circuit 2
2Coil connect; Electric lock switch and oil pressure state judge that signal amplification circuit 2 comprises an amplifier BG
1, this amplifier BG
1Input end has the two-way input, the resistance of wherein leading up to coupling R
1, D
5Start terminal K with electric lock and be connected, another road is by the resistance R that is coupled
2, D
10Q is connected this amplifier BG with electric lock igniting terminal
1Input end also with between the alarm switch terminal BJ is connected to the diode D that forward is connected
4, this amplifier BG
1Output terminal be connected with first output signal amplification circuit 3; First output signal amplification circuit 3 comprises a power amplifier BG
2, this power amplifier BG
2Output terminal and positive supply between be connected to the first relay J D
1Coil, this relay J D
1The normally opened contact two ends, be connected to current-limiting resistance R between an end and the positive supply
4, the other end is connected with the coil of electromagnet 7; The other end ground connection of electromagnet 7 coils; Second output signal amplification circuit 4 comprises a power amplifier BG
3, this power amplifier BG
3Input end be connected, export the termination second relay J D with control circuit 5
2The coil the other end, the second relay J D
2The normally opened contact two ends, an end is connected with positive supply, the other end is connected with the non-grounding end of the coil of electromagnet 7; Control circuit 5 comprises three branch roads, and first branch road is serially connected with the isolating diode D that forward is connected successively between the input end of electric lock igniting terminal K and second output signal amplification circuit 4
11, discharge resistance R
5Adjust diode D with the operation point
13, second branch road is at above-mentioned isolating diode D
11With discharge resistance R
5Serial connection point and ground between be connected to charge and discharge capacitance C
3, the 3rd branch road is at above-mentioned discharge resistance R
5Adjust diode D with the operation point
13Be connected to catching diode D between the output terminal of serial connection point and electric lock switch and oil pressure state judgement signal amplification circuit 2
12, field circuit 6 is included in the diode D that forward is connected between generator signal terminal N and the generator voltage controller terminal B
2, forward is connected between electric lock igniting terminal K and generator voltage controller terminal B diode D
1, forward is connected between the non-grounding end of electromagnet 7 coils and generator voltage controller terminal B diode D
8In the accompanying drawing, the flame-out arm 9 of Injection Pump 10 is connected with pull bar 8.
Claims (2)
1, a kind of diesel electric-controlled flame-out and machine oil under-voltage protection device, comprise an electromagnet (7), with the pull bar (8) that the moving contact of electromagnet (7) is connected, it is characterized in that also comprising engine running signal amplification circuit (1), electric lock switch and oil pressure state judgement signal amplification circuit (2), first output signal amplification circuit (3), second output signal amplification circuit (4), control circuit (5) and field circuit (6); Engine running signal amplification circuit (1) comprises an amplifier (BG
4), this amplifier (BG
4) input end by resistance-capacitance coupling (C
1, R
0) be connected with generator signal terminal (N), output terminal has two-way output, wherein one the tunnel is connected another road and the second relay (JD with the output terminal of electric lock switch and oil pressure state judgement signal amplification circuit (2)
2) coil connect; Electric lock switch and oil pressure state judge that signal amplification circuit (2) comprises an amplifier (BG
1), this amplifier (BG
1) input end has two-way input, the resistance of wherein leading up to coupling (R
1, D
5) be connected with electric lock startup terminal (K), another road is by resistance coupling (R
2, D
10) be connected this amplifier (BG with electric lock igniting terminal (Q)
1) input end also with between the alarm switch terminal (BJ) is connected to the diode (D that forward is connected
4), this amplifier (BG
1) output terminal be connected with first output signal amplification circuit (3); First output signal amplification circuit (3) comprises a power amplifier (BG
2), this power amplifier (BG
2) output terminal and positive supply between be connected to the first relay (JD
1) coil, this relay (JD
1) the normally opened contact two ends, an end is connected with positive supply, the other end is connected with the coil of electromagnet (7); The other end ground connection of electromagnet (7) coil; Second output signal amplification circuit (4) comprises a power amplifier (BG
3), this power amplifier (BG
3) input end be connected, export the termination second relay (JD with control circuit (5)
2) the coil the other end, the second relay (JD
2) the normally opened contact two ends, an end is connected with positive supply, the other end is connected with the non-grounding end of coil of electromagnet (7); Control circuit (5) comprises three branch roads, and first branch road is serially connected with the isolating diode (D that forward is connected successively between electric lock is lighted a fire the input end of terminal (K) and second output signal amplification circuit (4)
11), discharge resistance (R
5) and operation point adjustment diode (D
13), second branch road is at above-mentioned isolating diode (D
11) and discharge resistance (R
5) serial connection point and ground between be connected to charge and discharge capacitance (C
3), the 3rd branch road is at above-mentioned discharge resistance (R
5) adjust diode (D with the operation point
13) serial connection point and electric lock switch and oil pressure state judge signal amplification circuit (2) output terminal between be connected to catching diode (D
12); Field circuit (6) is included in the diode (D that forward is connected between generator signal terminal (N) and the generator voltage controller terminal (B)
2), forward is connected between electric lock igniting terminal (K) and generator voltage controller terminal (B) diode (D
1), forward is connected between the non-grounding end of electromagnet (7) coil and generator voltage controller terminal (B) diode (D
8).
2, diesel electric-controlled flame-out and machine oil under-voltage protection device according to claim 1 is characterized in that the first relay (JD
1) normally opened contact be connected in series a current-limiting resistance (R
4) after, be connected with positive supply again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99220452 CN2374652Y (en) | 1999-04-08 | 1999-04-08 | Electrically-controlled cutoff and engine oil underpressure protector for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99220452 CN2374652Y (en) | 1999-04-08 | 1999-04-08 | Electrically-controlled cutoff and engine oil underpressure protector for diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2374652Y true CN2374652Y (en) | 2000-04-19 |
Family
ID=34011194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99220452 Expired - Fee Related CN2374652Y (en) | 1999-04-08 | 1999-04-08 | Electrically-controlled cutoff and engine oil underpressure protector for diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2374652Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100404840C (en) * | 2004-03-04 | 2008-07-23 | 现代自动车株式会社 | Fuel pump noise reducing apparatus and method thereof for liquefied petroleum injection vehicle |
-
1999
- 1999-04-08 CN CN 99220452 patent/CN2374652Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100404840C (en) * | 2004-03-04 | 2008-07-23 | 现代自动车株式会社 | Fuel pump noise reducing apparatus and method thereof for liquefied petroleum injection vehicle |
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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 |