CN203287716U - Safety control system of engineering machinery engine - Google Patents
Safety control system of engineering machinery engine Download PDFInfo
- Publication number
- CN203287716U CN203287716U CN201320362527XU CN201320362527U CN203287716U CN 203287716 U CN203287716 U CN 203287716U CN 201320362527X U CN201320362527X U CN 201320362527XU CN 201320362527 U CN201320362527 U CN 201320362527U CN 203287716 U CN203287716 U CN 203287716U
- Authority
- CN
- China
- Prior art keywords
- engine
- relay
- control system
- pin
- power supply
- 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 - Lifetime
Links
Images
Abstract
The utility model provides a safety control system of an engineering machinery engine. The system comprises a key switch, a power supply system, an engine start control system and an engine protection control system; the key switch is used for sending out a work instruction, a start instruction or a stop instruction; the power supply system comprises a storage battery, a power supply main switch and a power supply relay; the power supply relay is connected with the key switch, and controls access of other electric equipment; the engine start control system comprises a starting motor, a starting relay and an engine, and the starting relay receives the starting instruction of the key switch, and controls the start of the starting motor and drives the engine to enter into a working state. The safety control system of an engineering machinery engine has the beneficial effects that secondary starting of the engine can be effectively prevented, and in case of emergency, can effectively realize flame-out of the engine in time and cut off a power system, thereby preventing engine failure caused by human factors and occurrence of engineering machinery vehicle accidents.
Description
Technical field
The utility model belongs to engineering machinery field, especially relates to a kind of engineering machinery engine safety control system.
Background technology
The working condition of engineering machinery vehicle is complicated, work under bad environment; Therefore in a single day, the probability that engineering machinery vehicle breaks down is higher, and often has an accident, the consequence that causes is also more serious, particularly breakdown in the motor.In order to ensure job security, engineering machinery generally all is provided with key switch and emergency stop switch in pilothouse, and purpose is in the vehicle launch process, can effectively prevent engine generation restarting, reduces artificial generator injury; On the other hand, when being in an emergency in the vehicle operation process, the driver can pass through emergency stop switch, cuts off timely and effectively power system, avoids the generation of accident.
As shown in Figure 1, the emergency stop switch S2 of prior art is between the positive pole of the lock catch of key switch S1 and accumulator BAT, and its main course of work is as follows:
(1) carry out the startup of control engine ECU by the startup shelves of key switch S1;
Key switch S1 is forwarded to and starts shelves, the output current of accumulator BAT is as the enabling signal of Engine ECU at this moment, startup shelves through insurance FU1, emergency stop switch S2, key switch S1, make the coil of starting relay K2 obtain electric, the normally opened contact of the starting relay K2 after electric is closed, the output current of accumulator BAT is starter motor QD power supply through the ST pin of starter motor QD, and starter motor QD drives Engine ECU and enters duty.
(2) lock catch by key switch S1 comes control engine ECU flame-out;
Originally the electric current of exporting from accumulator BAT, arrive the H pin of Engine ECU through the work shelves of insurance FU1, emergency stop switch S2 and key switch S1, when forwarding key switch S1 to lock catch, this current path can disconnect because of the lock catch state that is in of key switch S1.Because the H pin of generator ECU is Low level effective, so this moment, Engine ECU was flame-out.
(3) come control engine ECU flame-out by emergency stop switch S2;
In case while being in a state of emergency, can stop by the sudden-stop function of emergency stop switch S2 the work of Engine ECU.When emergency stop switch S2 is in anxious stop grade, at this moment,, originally from the electric current of accumulator BAT output,, through the work shelves of insurance FU1, emergency stop switch S2 and the key switch S1 H pin to Engine ECU, can stop disconnecting the input of cutting off electric current because of the urgency of emergency stop switch S2; Because the H pin of generator ECU is Low level effective, thus the time Engine ECU flame-out.
(4) show the duty of Engine ECU by the light on and off of pilot lamp H1;
When Engine ECU started, accumulator BAT was generator G and the power supply of whole electrical system.Electric current from accumulator BAT output, work shelves and diode D4 through insurance FU1, emergency stop switch S2, key switch S1, be delivered to the D pin of diode D5, charging indicator light H1 and generator G, and then make charging indicator light H1 luminous, show that accumulator BAT is being whole electrical system power supply.
When Engine ECU works, the D pin of generator G can be exported the voltage of DC28V, originally exported to the electric current of the D pin of generator G by accumulator, finally because of the D pin of generator G, exported DC28V voltage, and the electric current of circulation is originally ended at diode D5 place; At this moment, charging indicator light extinguishes, and shows that generator G is being accumulator BAT and the power supply of whole electrical system.
(5) realize the delay cut-off of whole electrical system is protected by relay K 3;
When generator G worked, D pin output DC28V voltage, made the coil of the 3rd relay K 3 obtain electric; The electric current of accumulator BAT just, through the normally opened contact of the 3rd relay K 3 closures, is the coil power supply of power supply relay K1.In case key switch S1 or scram button S2 disconnect, and can cut off the input voltage at the H pin place of Engine ECU, and then Engine ECU is quit work.But this moment, generator G can remain in operation and output voltage because of inertia, make the coil of the 3rd relay K 3 continue electricly, and then the normally opened contact that makes the 3rd relay K 3 is in the state that continues closure, the coil delay cut-off of power supply relay K1, and then the normally opened contact time delay of power supply relay K1 is disconnected, and then make whole electrical system delay cut-off, will reduce like this impact of the emergency cut-off of voltage or electric current to electric elements, thereby extend the serviceable life of electrical equipment.
Yet in prior art, still there is following problem in engineering machinery engine ECU safety control system:
First: in the Engine ECU start-up course, still may cause Engine ECU restarting fault.Some key switch has the function of anti-restarting, and still, if on engineering machinery, requirement can start Engine ECU in many places, so single key switch just can't prevent the damage of the restarting that occurs in all start-up courses to Engine ECU.
Second: in the Engine ECU operation process, there will be the fault that can't stop Engine ECU.
(1), now to the stopping of Engine ECU, all by key switch S1 or emergency stop switch S2, control.But, if diode D4 is breakdown, the normally opened contact of the 3rd relay K 3 is in closure state always simultaneously, will carry out short circuit to key switch S1 and emergency stop switch S2, and then cause key switch S1 and emergency stop switch S2 all can't stop the fault of Engine ECU.
(2) as diode D4 and diode D5 when breakdown, the electric current of generator G, through charging indicator light H1, diode D5, diode D4, key switch S1, arrives the H pin of generator ECU, makes the Engine ECU normal operation.So no matter which kind of duty key switch S1 or emergency stop switch S2 are in, and are all to stop Engine ECU.
The the 3rd: when by emergency stop switch S2, stopping Engine ECU, also can cut off the operating voltage of other consumer, for example can cause the illuminator cisco unity malfunction, affect the ability of working at night and other ability to work of engineering machinery.
Summary of the invention
Problem to be solved in the utility model is to provide a kind of engineering machinery engine safety control system, especially is fit to many places engine is started, the generation that can't stop breakdown in the motor of also having avoided the damage due to the part diode to cause simultaneously.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of engineering machinery engine safety control system comprises:
Key switch S1, have the work shelves, start shelves and lock catch, is used for sending work order, enabled instruction or halt instruction;
Electric power system, comprise accumulator BAT, battery main switch S0 and power supply relay K1, and described power supply relay K1 is connected with the work shelves of described key switch S1, and described power supply relay K1 controls the access of other consumer;
Engine start control system, comprise starter motor QD, starting relay K2 and Engine ECU, described starting relay K2 receives the enabled instruction of described key switch S1, and controlling the startup of described starter motor QD, the described starter motor QD after startup drives described Engine ECU and enters into duty;
Generator protection control system, comprise generator G, the 3rd relay K 3 and emergency stop switch S2, described generator G connects described accumulator BAT by described battery main switch S0, described the 3rd relay K 3 connects described generator G and controls the conducting state of described starting relay K2, and described emergency stop switch S2 sends the emergent stopping instruction to described Engine ECU;
Further, the lock catch of described key switch S1 connects the positive pole of described accumulator BAT by the first insurance FU1;
Further, the end of described accumulator BAT is by battery main switch S0 ground connection, and its other end connects respectively described engine start control system and described generator protection control system;
The coil of described power supply relay K1 connects the work shelves of described key switch S1 by diode D4, the normally opened contact of described power supply relay K1 connects described other consumer;
Further, the ST pin of described starter motor QD and B pin connect respectively the positive pole of described accumulator BAT, and its A pin is connected to the negative pole of described accumulator BAT by described battery main switch S0;
Coil one end of described starting relay K2 connects the startup shelves of described key switch S1, its other end connects the negative pole of described accumulator BAT, and the normally opened contact of described starting relay K2 is between the ST pin of the anodal and described starter motor QD of described accumulator BAT;
The F pin of described Engine ECU connects the positive pole of described accumulator BAT by the second insurance FU2, the H pin of described Engine ECU connects the work shelves of described key switch S1;
Further, the C pin of described generator G connects the positive pole of described accumulator BAT by the 3rd insurance FU3, is connected with the coil of described the 3rd relay K 3 between its D pin and E pin, and described E pin also connects the negative pole of described accumulator BAT;
The normally opened contact of described the 3rd relay K 3 is connected between the coil of the normally opened contact of described power supply relay K1 and described power supply relay K1, and the normally closed contact of described the 3rd relay K 3 is connected between the coil of the startup shelves of described key switch S1 and described starting relay K2;
Described emergency stop switch S2 is connected between the work shelves of the H pin of described Engine ECU and described key switch S1.
Further, described generator G Protection control system also comprises a power light H1, the end of described power light H1 is connected with the D pin of described Engine ECU, and its other end connects the positive pole of described accumulator BAT successively by diode D5 and the 4th insurance FU4;
Further, the coil two ends of described power supply relay K1 connect diode D1, and the coil two ends of described starting relay K2 connect diode D2, and the coil two ends of described the 3rd relay K 3 connect diode D3;
Further, described emergency stop switch S2 is the pushbutton switch that is provided with red coatings.
Advantage and the good effect that the utlity model has are: described engine start control system carrys out the disconnection of pilot relay normally closed contact by the voltage of self exporting, can in time disconnect the connection that starts between shelves and starting relay, prevent the restarting of engine; Described emergency stop switch is between the work shelves of the H of described engine pin and key switch, on the one hand, the function of the emergency stop switch in the utility model can not be subject to the impact of the components and parts damages such as diode, on the other hand, the power supply that in case of emergency can effectively cut off engine simultaneously can not have influence on the working condition of other consumer.
Description of drawings
Fig. 1 is the circuit diagram of prior art
Fig. 2 is the circuit diagram of the present embodiment
Embodiment
As shown in Figure 2, the utility model relates to a kind of engineering machinery engine safety control system, comprising:
Key switch S1, have the work shelves, start shelves and lock catch, is used for sending work order, enabled instruction or halt instruction, and the lock catch of described key switch S1 connects the positive pole of described accumulator BAT by the first insurance FU1;
Electric power system, comprise accumulator BAT, battery main switch S0 and power supply relay K1, and described power supply relay K1 is connected with the work shelves of described key switch S1, and described power supply relay K1 controls the access of other consumer; The end of described accumulator BAT is by battery main switch S0 ground connection, and its other end connects respectively described engine start control system and described generator protection control system; The coil of described power supply relay K1 connects the work shelves of described key switch S1 by diode D4, the normally opened contact of described power supply relay K1 connects described other consumer; The coil two ends of described power supply relay K1 connect diode D1;
Engine start control system, comprise starter motor QD, starting relay K2 and Engine ECU, described starting relay K2 receives the enabled instruction of described key switch S1, and controlling the startup of described starter motor QD, the described starter motor QD after startup drives described Engine ECU and enters into duty; The ST pin of described starter motor QD and B pin connect respectively the positive pole of described accumulator BAT, and its A pin is connected to the negative pole of described accumulator BAT by described battery main switch S0; Coil one end of described starting relay K2 connects the startup shelves of described key switch S1, its other end connects the negative pole of described accumulator BAT, the coil two ends of described starting relay K2 also are connected with diode D2, and the normally opened contact of described starting relay K2 is between the ST pin of the anodal and described starter motor QD of described accumulator BAT; The F pin of described Engine ECU connects the positive pole of described accumulator BAT by the second insurance FU2, the H pin of described Engine ECU connects the work shelves of described key switch S1;
Generator protection control system, comprise generator G, the 3rd relay K 3 and emergency stop switch S2, described generator G connects described accumulator BAT by described battery main switch S0, described the 3rd relay K 3 connects described generator G and controls the conducting state of described starting relay K2, and described emergency stop switch S2 sends the emergent stopping instruction to described Engine ECU; The C pin of described generator G connects the positive pole of described accumulator BAT by the 3rd insurance FU3, be connected with the coil of described the 3rd relay K 3 between its D pin and E pin, and the coil two ends of described the 3rd relay K 3 connect diode D3; Described E pin also connects the negative pole of described accumulator BAT; The normally opened contact of described the 3rd relay K 3 is connected between the coil of the normally opened contact of described power supply relay K1 and described power supply relay K1, and the normally closed contact of described the 3rd relay K 3 is connected between the coil of the startup shelves of described key switch S1 and described starting relay K2; Described emergency stop switch S2 is connected between the work shelves of the H pin of described Engine ECU and described key switch S1.
Described generator G Protection control system also comprises a power light H1, and the end of described power light H1 is connected with the D pin of described Engine ECU, and its other end connects the positive pole of described accumulator BAT successively by diode D5 and the 4th insurance FU4;
Described emergency stop switch S2 is the pushbutton switch that is provided with red coatings, presses locking, by anticlockwise or right rotation, it is resetted.
The course of work of this example:
(1) driver forwards key switch S1 to the work shelves, then closed electrical source switch S0, the coil of power supply relay K1 obtains electric, and the normally opened contact of power supply relay K1 is closed, and the output current of accumulator BAT exports sustained diode 4 to through insurance FU1, emergency stop switch S2, key switch S1; It is electric that one part of current obtains the coil of power supply relay K1, and the normally opened contact of power supply relay K1 is closed simultaneously, is other consumer power supply; Another part electric current makes charging indicator light H1 bright through diode D5;
(2) output current of accumulator BAT is through insurance FU2, F pin power supply for Engine ECU, the output current of accumulator BAT is the B pin power supply of engine cranking motor QD, and the output current of accumulator BAT is the C pin power supply of generator G through insurance FU3, and the C pin is the normal electricity end of generator G;
When (3) driver forwarded key switch S1 to the startup gear, the coil of starting relay K2 obtained electric, and the normally opened contact of starting relay K2 is closed.Electric current is the ST pin power supply of starter motor QD by accumulator BAT through the normally opened contact of the closure of starting relay K2, and Engine ECU starts to start under the drive of starter motor QD;
(4) key switch S1 is in while starting shelves, except the function with starting engine, also has other function in the work file location;
(5) after power switch S0 closure, when Engine ECU worked, generator G can normally outwards export the voltage of DC28V, and the coil of the 3rd relay K 3 obtains electric, the normally closed contact of the 3rd relay K 3 disconnects, and has cut off the connection that starts between shelves and starting relay K2; This moment starter motor QD with disconnect accumulator BAT or being connected all of generator G, the also startup of uncontrollable Engine ECU, thus prevented the restarting of Engine ECU, protected Engine ECU.
(6) when accumulator BAT powered with other consumer to generator G, charging indicator light H1 was bright, and when generator G powered to accumulator BAT with other consumer, charging indicator light H1 did not work; And regardless of the state of diode D5, the charging indication mechanism can not affect the normal operation of other electric elements;
(7) when Engine ECU needs orderly closedown, can pass through screw key switch S 1, cut off the electric current that is passed to generator ECU from accumulator BAT, and then stop the work of Engine ECU;
(8) when needs emergent stopping Engine ECU, can disconnect emergency stop switch S2, cut off the H pin of generator ECU and work being connected between shelves with key switch S2, thereby cut off the electric current that is passed to generator ECU from accumulator BAT, stop the work of Engine ECU; At this moment, other consumer can work, and any one diode of system breaks down, and does not affect the flame-out of engine.
Above an embodiment of the present utility model is had been described in detail, but described content is only preferred embodiment of the present utility model, can not be considered to be used to limiting practical range of the present utility model.All equalizations of doing according to the utility model application range change and improve etc., within all should still belonging to patent covering scope of the present utility model.
Claims (8)
1. an engineering machinery engine safety control system, is characterized in that, comprising:
Key switch (S1), have the work shelves, start shelves and lock catch, is used for sending work order, enabled instruction or halt instruction;
Electric power system, comprise accumulator (BAT), battery main switch (S0) and power supply relay (K1), described power supply relay (K1) is connected with the work shelves of described key switch (S1), and described power supply relay (K1) is controlled the access of other consumer;
Engine start control system, comprise starter motor (QD), starting relay (K2) and engine (ECU), described starting relay (K2) receives the enabled instruction of described key switch (S1), and control the startup of described starter motor (QD), the described starter motor (QD) after startup drives described engine (ECU) and enters into duty;
Generator protection control system; comprise generator (G), the 3rd relay (K3) and emergency stop switch (S2); described generator (G) connects described accumulator (BAT) by described battery main switch (S0); described the 3rd relay (K3) connects described generator (G) and controls the conducting state of described starting relay (K2), and described emergency stop switch (S2) sends the emergent stopping instruction to described engine (ECU).
2. a kind of engineering machinery engine safety control system according to claim 1 is characterized in that: the lock catch of described key switch (S1) connects the positive pole of described accumulator (BAT) by the first insurance (FU1).
3. a kind of engineering machinery engine safety control system according to claim 1, it is characterized in that: an end of described accumulator (BAT) is by battery main switch (S0) ground connection, and its other end connects respectively described engine start control system and described generator protection control system;
The coil of described power supply relay (K1) connects the work shelves of described key switch (S1) by diode D4, the normally opened contact of described power supply relay (K1) connects described other consumer.
4. a kind of engineering machinery engine safety control system according to claim 1, it is characterized in that: the ST pin of described starter motor (QD) and B pin connect respectively the positive pole of described accumulator (BAT), and its A pin is connected to the negative pole of described accumulator (BAT) by described battery main switch (S0);
Coil one end of described starting relay (K2) connects the startup shelves of described key switch (S1), its other end connects the negative pole of described accumulator (BAT), and the normally opened contact of described starting relay (K2) is positioned between the ST pin of the positive pole of described accumulator (BAT) and described starter motor (QD);
The F pin of described engine (ECU) connects the positive pole of described accumulator (BAT) by the second insurance (FU2), the H pin of described engine (ECU) connects the work shelves of described key switch (S1).
5. a kind of engineering machinery engine safety control system according to claim 1, it is characterized in that: the C pin of described generator (G) connects the positive pole of described accumulator (BAT) by the 3rd insurance (FU3), be connected with the coil of described the 3rd relay (K3) between its D pin and E pin, described E pin also connects the negative pole of described accumulator (BAT);
The normally opened contact of described the 3rd relay (K3) is connected between the coil of the normally opened contact of described power supply relay (K1) and described power supply relay (K1), and the normally closed contact of described the 3rd relay (K3) is connected between the coil of the startup shelves of described key switch (S1) and described starting relay (K2);
Described emergency stop switch (S2) is connected between the work shelves of the H pin of described engine (ECU) and described key switch (S1).
6. a kind of engineering machinery engine safety control system according to claim 5; it is characterized in that: described generator (G) Protection control system also comprises a power light (H1); one end of described power light (H1) is connected with the D pin of described engine (ECU), and its other end insures (FU4) by diode D5 and the 4th successively and connects the positive pole of described accumulator (BAT).
7. the described a kind of engineering machinery engine safety control system of any one according to claim 1-6, it is characterized in that: the coil two ends of described power supply relay (K1) connect diode D1, the coil two ends of described starting relay (K2) connect diode D2, and the coil two ends of described the 3rd relay (K3) connect diode D3.
According to claim 7 in the described a kind of engineering machinery engine safety control system of any one, it is characterized in that: described emergency stop switch (S2) is for being provided with the pushbutton switch of red coatings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320362527XU CN203287716U (en) | 2013-06-24 | 2013-06-24 | Safety control system of engineering machinery engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320362527XU CN203287716U (en) | 2013-06-24 | 2013-06-24 | Safety control system of engineering machinery engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203287716U true CN203287716U (en) | 2013-11-13 |
Family
ID=49544072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320362527XU Expired - Lifetime CN203287716U (en) | 2013-06-24 | 2013-06-24 | Safety control system of engineering machinery engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203287716U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103345171A (en) * | 2013-06-24 | 2013-10-09 | 天津山河装备开发有限公司 | Safety control system of engineering machinery engine |
| CN104753141A (en) * | 2015-04-10 | 2015-07-01 | 成都雅骏新能源汽车科技股份有限公司 | 12V charging platform circuit compatible with and suitable for 24V platform electromobile |
| CN110318927A (en) * | 2019-07-02 | 2019-10-11 | 安徽合力股份有限公司 | A kind of starting control protective unit of diesel fork lift truck and its control guard method |
| WO2021011258A1 (en) * | 2019-07-12 | 2021-01-21 | Schweitzer Engineering Laboratories, Inc. | Secure electric power delivery system protection during cyber threats |
| CN112483295A (en) * | 2020-11-25 | 2021-03-12 | 三一重机有限公司 | Starting control method and device and engineering machinery |
-
2013
- 2013-06-24 CN CN201320362527XU patent/CN203287716U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103345171A (en) * | 2013-06-24 | 2013-10-09 | 天津山河装备开发有限公司 | Safety control system of engineering machinery engine |
| CN104753141A (en) * | 2015-04-10 | 2015-07-01 | 成都雅骏新能源汽车科技股份有限公司 | 12V charging platform circuit compatible with and suitable for 24V platform electromobile |
| CN110318927A (en) * | 2019-07-02 | 2019-10-11 | 安徽合力股份有限公司 | A kind of starting control protective unit of diesel fork lift truck and its control guard method |
| WO2021011258A1 (en) * | 2019-07-12 | 2021-01-21 | Schweitzer Engineering Laboratories, Inc. | Secure electric power delivery system protection during cyber threats |
| US11108737B2 (en) | 2019-07-12 | 2021-08-31 | Schweitzer Engineering Laboratories, Inc. | Secure electric power delivery system protection during cyber threats |
| CN112483295A (en) * | 2020-11-25 | 2021-03-12 | 三一重机有限公司 | Starting control method and device and engineering machinery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203287716U (en) | Safety control system of engineering machinery engine | |
| CN103345171A (en) | Safety control system of engineering machinery engine | |
| CN202435320U (en) | Protection circuit of soft starter | |
| CN203050973U (en) | Vehicle starting motor overtime protection system | |
| CN106655475A (en) | Automatic switching and delay shutdown circuit of ship emergency power generation set | |
| CN201197086Y (en) | Redundant power supply used for digital electro-hydraulic control system of turbine | |
| CN113022313B (en) | VCU power-off protection circuit, power-off control method, system and engineering machinery | |
| CN105207344A (en) | Security power supply system and control method thereof | |
| CN203301225U (en) | Control device based on security-section interlocking self-switchover of gas-steam combined unit | |
| CN202165256U (en) | Controller for air compressor | |
| CN109412466B (en) | Steam turbine emergency direct-current lubricating oil pump composite start-stop device and control method | |
| CN205344543U (en) | A hybrid vehicle high -pressure interlocking return circuit (HVIL) based on security policy | |
| CN201736825U (en) | Low-voltage and self-locking power supply device of fuel-cell light bus | |
| CN203553046U (en) | Voltage sag prevention delay module | |
| CN202333962U (en) | Airborne emergency power supply system | |
| CN212079595U (en) | Emergency pump set control system | |
| CN205876582U (en) | Automatic keep off engine start circuit and vehicle of gearbox | |
| CN104037935B (en) | A kind of Double Power Switch Controller of band short circuit tripping protection | |
| CN210652696U (en) | New energy automobile and low-voltage power supply circuit thereof | |
| CN2893199Y (en) | Full-automatic controller for air compressor with diesel engine as power | |
| CN208010500U (en) | A kind of automobile start circuit | |
| CN206129581U (en) | Emergent pump electric device that opens of fire -fighting water pump machinery | |
| CN205960787U (en) | Fan oil station power loop control device | |
| CN204928648U (en) | Remote control system of anti -interference generator of 10kW remote control | |
| CN204383360U (en) | An a kind of key start up system power control circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131113 |
|
| CX01 | Expiry of patent term |