CN1170815A

CN1170815A - Electromagnetic valve oil cut-off control mechanism for diesel engine

Info

Publication number: CN1170815A
Application number: CN97112601A
Authority: CN
Inventors: 叶邦恩
Original assignee: YE BANG'EN
Current assignee: YE BANG'EN
Priority date: 1997-05-13
Filing date: 1997-05-13
Publication date: 1998-01-21
Anticipated expiration: 2017-05-13
Also published as: CN1061738C

Abstract

The said control mechanism includes accumulator and electric generator comprising winding, rectifying diodes, voltage regulator and magnetic field coil, and it features that it also includes fuse, the loop comprising normally open contact of relay and electromagnetic valve controllingthe rocking arm of oil cut-off valve for oil pump, and control switch for connecting the magnetic field loop of electric generator and the relay loop separately. When the engine stops, the control switch turns off and turns on the relay to close the normally open contact, connect the electromagnetic valve and drive the rocking arm to cut off oil path, and makes the fire go out automatically.

Description

Electromagnetic valve oil cut-off control mechanism for diesel engine

The present invention relates to a kind ofly be used to control motorized vehicles and vessels and engineering machinery with the flame-out solenoid valve cut-off control mechanism of diesel engine.

Diesel engine adopts the ignition by compression mode, diesel engine is flame-out not only will turn off electric switch so make, also must cut off oil pump feed, at present the method that adopts have that steel wire is plug-type, pressurized air controlling type and solenoid valve push button, all need the extra action of doing to turn-off, particularly use the most general plug-type needs of steel wire always with pulling until engine misses, it is very inconvenient to operate, and can not only need the switch electric switch just can light a fire automatically, stop working as petrol engine.

Purpose of the present invention provides a kind of switch that utilizes can automatically control the flame-out solenoid valve cut-off control mechanism of diesel engine with regard to being for the defective that overcomes above-mentioned prior art.

The object of the present invention is achieved like this: electromagnetic valve oil cut-off control mechanism for diesel engine, comprise that storage battery E reaches by generator windings L1, commutation diode D1～D11, voltage regulator TJ, the band self-keeping circuit generator that field coil L2 constitutes, it is characterized in that also comprising and be connected in parallel on storage battery E two ends by safety fuse cutout RD, a loop and an on-off controller K1 that the solenoid valve DCF of relay J 1 normally opened contact and control oil pump oil cut-off valve rocking arm YB constitutes, corresponding 2 winding points are right respectively for two kinds of on off states of " ON " of K1 and " OFF ": a-b and b-c, wherein a contact connects the positive pole of storage battery E, the control output end N contact of b contact sending and receiving motor, the c contact is succeeded an end of electrical equipment J1 coil, the other end ground connection of relay J 1 coil; Also be that on-off controller K1 can be communicated with generator field loop and relay J 1 loop respectively, when needs are flame-out, K1 is put " OFF " position, promptly disconnect a, b and connect b, c, make normally opened contact closure, the connection solenoid valve DCF of relay J 1, thereby drive oil pump oil cut-off valve rocking arm YB and cut off oil circuit, make the motor auto extinguishing.

Use after the present invention, make engine misses, need only turn-off switch and get final product, operation settles at one go, and is very convenient, laborsaving, and the motor auto extinguishing protection when this control mechanism is also for realization temperature, pressure anomaly simultaneously provides precondition.

Description of drawings:

Fig. 1 is circuit theory diagrams of the present invention.

Fig. 2 is the circuit theory diagrams of one embodiment of the present of invention.

Fig. 3 is the circuit theory diagrams that increase a double-contact autocontrol switch K3 among Fig. 1.

Fig. 4 is the circuit theory diagrams that increase a double-contact autocontrol switch K3 among Fig. 2.

Fig. 5 is the circuit theory diagrams that increase a normally closed autocontrol switch K4 among Fig. 2.

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

As shown in Figure 1, generator windings L1, generator voltage controller TJ, field coil L2 and commutation diode D1-D11 constitute a band self-keeping circuit generator, this is existing a kind of electric generator structure in the diesel engine, K1 is an on-off controller among the figure, corresponding 2 winding points are right respectively for two kinds of on off states of " ON " of K1 and " OFF ": a-b and b-c, wherein a contact connects the positive pole of storage battery E, the control output end N contact of b contact sending and receiving motor, so the a-b contact is to can be used as switch, but when the a-b of on-off controller K1 contact disconnects, field coil L2 still can maintain certain magnetic field, keeping generator works on, when engine speed more and more slowly when stopping, field coil L2 goes up magnetic field and and then disappears, generator just really quits work;

DCF is the solenoid valve of a control oil pump oil cut-off valve rocking arm YB among Fig. 1, when it gets electric work, pulling rocking arm YB can cut off oil circuit, the normally opened contact of relay J 1 connects the two ends of storage battery E respectively behind series electrical magnet valve DCF, the safety fuse cutout RD, the c contact of one termination on-off controller K1 of relay J 1 coil, the other end ground connection

The concrete working state of entire circuit is as follows:

Working state 1: motor is in flameout state, this moment, on-off controller K1 was in " OFF " position, be that a-b disconnects and the b-c connection, generator does not generate electricity, the output of N end no-voltage does not have electric current to pass through on the coil of relay J 1, and its contact often remains opens, solenoid valve DCF does not have electricity and does not work, and oil circuit is in the fuel feeding state;

Working state 2: this moment, on-off controller K1 was in " ON " position, and promptly a-b connects and the b-c disconnection, and motor is in operating condition, the wire loop of relay J 1 does not have, its contact still often remains and opens, and solenoid valve DCF does not have electricity and do not work, and oil circuit still is in the fuel feeding state;

Working state 3: when motor need stop working; make on-off controller K1 be in " OFF " position; be that a-b disconnects and the b-c connection; because generator self self-keeping circuit's effect makes generator can continue generating; the coil of relay J 1 is held to such an extent that conduct from N; inhale moving its normally opened contact closure; so solenoid valve DCF gets electric work; drive oil pump oil cut-off valve rocking arm YB and cut off oil circuit; engine speed is slack-off gradually then; generator descends gradually at the output voltage of N end; when engine speed was reduced to minimum idling speed point, the N terminal voltage still was higher than the minimum pick-up voltage of relay J 1, and solenoid valve DCF continues to keep attracting state; at last when the N of generator output end voltage is lower than the pick-up voltage of relay J 1; solenoid valve DCF dead electricity resets, and oil circuit is unimpeded once more, but this moment, engine speed was close to zero; can not start voluntarily again, thus flame-out fully.

From top description as seen, the execution action of described on-off controller K1 is equivalent to a single-pole double-throw switch (SPDT), so the simplest on-off controller K1 can directly adopt a single-pole double-throw switch (SPDT), but more meet present actual conditions still as disclosed scheme among Fig. 2:

K switch 2 among Fig. 2, diode D12 and relay J 2 promptly constitute above-mentioned on-off controller K1, wherein K switch 2 is original motor switch, the one end promptly links to each other with the positive pole of storage battery as contact a, the other end connects an end of relay J 2 coils, the other end ground connection of relay J 2 coils, relay J 2 is used for the break-make of direct control relay J1, one end of its normally-closed contact links to each other with the control output end N contact of generator, the other end links to each other with the coil of relay J 1 as contact c, and the anode of diode D12 links to each other with K switch 2, negative electrode links to each other with the control output end N of generator as contact b; All the other are all identical with Fig. 1.

The concrete working state of entire circuit is as follows:

Working state 1: K switch 2 disconnects, motor is in flameout state, and generator does not generate electricity, and the output of N end no-voltage does not have electric current to pass through on the coil of relay J 1, and its contact often remains opens, and solenoid valve DCF does not work, and oil circuit is in the fuel feeding state;

Working state 2: K switch 2 closed conductings, motor are in operating condition, relay J 2 coils by K switch 2 from storage battery E, its normally-closed contact of adhesive makes it be in off state, thereby the coil power supply loop of block system relay J1, so the contact of relay J 1 still often remains and opens, solenoid valve DCF does not work, and oil circuit still is in the fuel feeding state;

Working state 3: when motor need stop working; cut off K switch 2; relay J 2 loses the voltage that storage battery E provides; simultaneously because the existence of isolating diode D12; the voltage of generator control output end N can not affact on the relay J 2; so coil losing electricity of relay J 2; its normally-closed contact closure; and because generator self self-keeping circuit's effect makes generator can continue generating; the coil of relay J 1 is held to such an extent that conduct by the normally-closed contact of relay J 2 from N; inhale moving its normally opened contact closure; connect the power supply of solenoid valve DCF; so solenoid valve DCF gets electric work; drive oil pump oil cut-off valve rocking arm YB and cut off oil circuit; engine speed is slack-off gradually then; generator descends gradually at the output voltage of N end; when engine speed is reduced to minimum idling speed point; the N terminal voltage still is higher than the minimum pick-up voltage of relay J 1; solenoid valve DCF continues to keep attracting state, and when the N of generator output end voltage was lower than the pick-up voltage of relay J 1, solenoid valve DCF dead electricity resetted at last; oil circuit is unimpeded once more; but this moment, engine speed was close to zero, can not start voluntarily again, thereby flame-out fully.

In sum, in the described circuit of Fig. 1, Fig. 2, make engine misses, only need cut-out b-N, connection N-c to get final product, if so between b, N, c, connect double-contact autocontrol switch K3, as reflect the pressure switch of the temperature detect switch (TDS) or the reflection engine lubrication oil pressure of engine coolant temperature, shown in Fig. 3,4, when engine temperature or pressure anomaly, this switch motion, cut off b-N, connect N-c, thereby reach the purpose of motor auto extinguishing protection;

The series loop of block system relay J2 and switch K2 also can make engine misses in Fig. 2; an if normally closed autocontrol switch K4 so in this series loop, connect again; as reflect the pressure switch of the temperature detect switch (TDS) or the reflection engine lubrication oil pressure of engine coolant temperature; as shown in Figure 5; when engine temperature or pressure anomaly; this switch automatic disconnection, thus reach the purpose that the motor auto extinguishing is protected.

The autocontrol switch that the also visual specific requirement of described autocontrol switch is other types.

Claims

1. electromagnetic valve oil cut-off control mechanism for diesel engine; comprise that storage battery E reaches by generator windings L1; commutation diode D1～D11; voltage regulator TJ; the band self-keeping circuit generator that field coil L2 constitutes; it is characterized in that also comprising and be connected in parallel on storage battery E two ends by safety fuse cutout RD; a loop and an on-off controller K1 that the solenoid valve DCF of relay J 1 normally opened contact and control oil pump oil cut-off valve rocking arm YB constitutes; corresponding 2 winding points are right respectively for two kinds of on off states of " ON " of K1 and " OFF ": a-b and b-c; wherein a contact connects the positive pole of storage battery E; the control output end N contact of b contact sending and receiving motor; the c contact is succeeded an end of electrical equipment J1 coil, the other end ground connection of relay J 1 coil.

2. electromagnetic valve oil cut-off control mechanism for diesel engine as claimed in claim 1 is characterized in that described on-off controller K1 is a single-pole double-throw switch (SPDT).

3. electromagnetic valve oil cut-off control mechanism for diesel engine as claimed in claim 1, it is characterized in that described on-off controller K1 is by K switch 2, diode D12 and relay J 2 constitute, one end of K switch 2 links to each other with the positive pole of storage battery as contact a, the other end connects an end of relay J 2 coils, the other end ground connection of relay J 2 coils, one end of its normally-closed contact links to each other with the control output end N contact of generator, the other end links to each other with the coil of relay J 1 as contact c, and the anode of diode D12 links to each other with K switch 2, negative electrode links to each other with the control output end N of generator as contact b.

4. as claim 1 or 3 described electromagnetic valve oil cut-off control mechanism for diesel engine, it is characterized in that being connected to double-contact autocontrol switch K3 between contact b, the c of described on-off controller K1 and the described generator control output end N.

5. electromagnetic valve oil cut-off control mechanism for diesel engine as claimed in claim 4 is characterized in that the temperature detect switch (TDS) of described double-contact autocontrol switch K3 for the reflection engine coolant temperature.

6. electromagnetic valve oil cut-off control mechanism for diesel engine as claimed in claim 4 is characterized in that the pressure switch of described double contact switch K3 for reflection engine lubrication oil pressure.

7. electromagnetic valve oil cut-off control mechanism for diesel engine as claimed in claim 3 is characterized in that also being in series with a normally closed autocontrol switch K4 in the series loop of the coil of described relay J 2 and switch K2.

8. electromagnetic valve oil cut-off control mechanism for diesel engine as claimed in claim 7 is characterized in that the temperature detect switch (TDS) of described normally closed autocontrol switch K4 for the reflection engine coolant temperature.

9. electromagnetic valve oil cut-off control mechanism for diesel engine as claimed in claim 7 is characterized in that the pressure switch of described normally closed autocontrol switch K4 for reflection engine lubrication oil pressure.