CN102157927B - Overvoltage protection circuit of engine - Google Patents
Overvoltage protection circuit of engine Download PDFInfo
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- CN102157927B CN102157927B CN 201110129202 CN201110129202A CN102157927B CN 102157927 B CN102157927 B CN 102157927B CN 201110129202 CN201110129202 CN 201110129202 CN 201110129202 A CN201110129202 A CN 201110129202A CN 102157927 B CN102157927 B CN 102157927B
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- generator
- electromagnetic switch
- total electromagnetic
- latching relay
- storage battery
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Abstract
The invention discloses an overvoltage protection circuit of an engine, which is capable of simultaneously preventing the unstable power supply system caused by a misoperation of a power switch and a circuit failure, wherein the overvoltage protection circuit comprises a power switch, a total electromagnetic switch, a storage battery, a generator and a latching relay; the positive electrode of the storage batteries connected to the positive electrode of a power supply through a normally opened contact of the total electromagnetic switch; the positive electrode of the storage battery is connected to a normally opened contact of the latching relay through the power switch and a control end of the total electromagnetic switch; a control end of the latching relay is connected to a neutral line of the generator; a positive output end of the generator and a stirring contact of the latching relay are connected to the positive end of the power supply; and the grounding ends of the storage battery, the total electromagnetic switch, the generator and the latching relay are connected to a negative electrode of the power supply. The overvoltage protection circuit of an engine provided by the invention has the advantage that the circuit can be used singly and also can be used by combining as a part of a starting circuit of an engine.
Description
Technical field
The present invention relates to the engine of automobile, refer more particularly to the overvoltage crowbar of engine.
Background technology
Modern bus engine automatically controlled Europe III, the Europe IV engines of adopting more; Core component ECU (Engine Control Unit) as control unit of engine is relatively more responsive to the voltage fluctuation of car load power-supply system; When higher fluctuation surge voltage appears in the car load power-supply system; Very easily puncture the electronic unit among the ECU, cause the ECU fault, thereby influenced the safe and reliable operation of engine.
In the conventional vehicles Electrical Appliances Designing, a lot of producers have designed the anti-misoperation snap close with the power supply rocker switch, and the powered-down switch could be operated after need pressing snap close.Adopt this kind mains switch only can prevent some rudimentary misoperations of driver, can not prevent the phenomenons such as power-supply system instability that break down and cause because of circuit on one's own initiative; And the range of choice of this anti-misoperation snap close power supply rocker switch is narrower, is unfavorable for the update of vehicle.
Summary of the invention
Technical problem to be solved by this invention is: a kind of overvoltage crowbar that can prevent to cause because of misoperation mains switch and fault the unsettled engine of power-supply system simultaneously is provided.
In order to solve the problems of the technologies described above; The technical scheme that the present invention adopted is: the overvoltage crowbar of engine; Comprise: mains switch, total electromagnetic switch, storage battery, generator and latching relay; The positive pole of storage battery links to each other with positive source through the normally opened contact group of total electromagnetic switch; The positive pole of storage battery links to each other with the control end of total electromagnetic switch and the normally opened contact of latching relay through mains switch; The control end of latching relay links to each other with the neutral line of generator, and the contact of stirring of the forward output of generator, latching relay links to each other with positive source, and storage battery, total electromagnetic switch, generator all link to each other with power cathode with latching relay earth terminal separately.
The corresponding contacts of the normally opened contact group of said total electromagnetic switch is prone to fuse through first and links to each other with positive source; The forward output of said generator is prone to fuse through second and links to each other with positive source.
Also be provided with the 5th between the positive pole of said storage battery and the mains switch and be prone to fuse.
The forward output of said generator links to each other with the positive pole of storage battery through the normally opened contact group of total electromagnetic switch.
Be serially connected with the 3rd between the normally opened contact group of the forward output of said generator and total electromagnetic switch and be prone to fuse the 4th easy fuse.
Described total electromagnetic switch is the direct solenoid contactor.
The invention has the beneficial effects as follows: the present invention after the vehicle motor running, utilizes generator neutral line N to bring out owing to increased latching relay; The work of drive latching relay; Control end power supply to total electromagnetic switch realizes the self-locking of total electromagnetic switch control circuit, makes the forward output of generator link to each other with the positive pole of storage battery all the time; Thereby after having avoided engine running; Make car load power-supply system moment produce overvoltage surge because of mains switch misoperation or fault cut off the storage battery main power circuit, puncture the vehicle electronics element, cause vehicle trouble.In addition, selecting for use of mains switch is unrestricted, helps the update of vehicle.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure: 2, mains switch, 6, total electromagnetic switch, 7, latching relay, 9, storage battery, 10, generator, 11, first is prone to fuse, and 12, second is prone to fuse, and the 13, the 3rd is prone to fuse, and the 14, the 4th is prone to fuse, and the 15, the 5th is prone to fuse.
Embodiment
Below in conjunction with accompanying drawing, describe specific embodiments of the present invention in detail.
As shown in Figure 1; The start-up circuit of engine according to the invention; Comprise: mains switch 2, total electromagnetic switch 6, storage battery 9, generator 10 and latching relay 7; The positive pole of storage battery 9 links to each other with the normally opened contact of the normally opened contact group of total electromagnetic switch 6, and the contact of stirring of this normally opened contact group links to each other with positive source through the first easy fuse 11; The positive pole of storage battery 9 links to each other with the control end of total electromagnetic switch 6 and the normally opened contact of latching relay 7 through mains switch 2; The control end of latching relay 7 links to each other with the neutral line (the centre cap N end of generator armature) of generator 10; The contact of stirring of latching relay 7 links to each other with positive source; The forward output B+ of generator 10 is prone to fuse 12 through second and links to each other with positive source; Storage battery 9, total electromagnetic switch 6, generator 10, latching relay 7 earth terminal separately all link to each other with power cathode, all are to link to each other through bonding usually; In the present embodiment, be provided with the 5th between the positive pole of said storage battery 9 and the mains switch 2 and be prone to fuse 15; Between the forward output B+ of said generator 10 and the normally opened contact group of total electromagnetic switch 6 except the connecting line through positive source links to each other; Also be provided with special-purpose charging circuit; That is: the forward output B+ of generator 10 links to each other with another root special wire with the contact of stirring of the normally opened contact group of total electromagnetic switch 6; And; Stirring of the normally opened contact group of one end of this special wire and total electromagnetic switch 6 is provided with the 3rd easy fuse 13 between the contact, be serially connected with the 4th between the forward output B+ of the other end of this special wire and generator 10 and be prone to fuse 14; Described total electromagnetic switch 6 is the direct solenoid contactor.
The course of work of the present invention is: in the vehicle operating process; Generator 10 neutral line N bring out the control end that electricity is given latching relay 7, drive latching relay 7 work, to the control end power supply of total electromagnetic switch 6; Realize the self-locking of total electromagnetic switch 6 control circuits; That is: the normally opened contact group of total electromagnetic switch 6 is in closure state always, makes the forward output B+ of generator 10 be in connected state with the positive pole of storage battery 9 all the time, and storage battery 9 directly can absorb some the unsettled surge voltages in the power-supply system; Guarantee the stable of car load power-supply system, the finished vehicle electronic element has been played the effect of voltage-stabilizing protection.
Claims (6)
1. the overvoltage crowbar of engine; Comprise: mains switch (2), total electromagnetic switch (6), storage battery (9) and generator (10); It is characterized in that; Also include: latching relay (7); The positive pole of storage battery (9) links to each other with positive source through the normally opened contact group of total electromagnetic switch (6), and the positive pole of storage battery (9) links to each other with the control end of total electromagnetic switch (6) and the normally opened contact of latching relay (7) through mains switch (2), and the control end of latching relay (7) links to each other with the neutral line of generator (10); The contact of stirring of the forward output of generator (10), latching relay (7) links to each other with positive source, and storage battery (9), total electromagnetic switch (6), generator (10) all link to each other with power cathode with latching relay (7) earth terminal separately.
2. overvoltage crowbar according to claim 1 is characterized in that: the corresponding contacts of the normally opened contact group of said total electromagnetic switch (6) is prone to fuse (11) through first and links to each other with positive source; The forward output of said generator (10) is prone to fuse (12) through second and links to each other with positive source.
3. overvoltage crowbar according to claim 1 is characterized in that: also be provided with the 5th between the positive pole of said storage battery (9) and the mains switch (2) and be prone to fuse (15).
4. overvoltage crowbar according to claim 1 is characterized in that: the forward output of said generator (10) links to each other with the positive pole of storage battery (9) through the normally opened contact group of total electromagnetic switch (6).
5. overvoltage crowbar according to claim 3 is characterized in that: be serially connected with the 3rd between the normally opened contact group of the forward output of said generator (10) and total electromagnetic switch (6) and be prone to fuse (13) and the 4th easy fuse (14).
6. according to each described overvoltage crowbar in the claim 1 to 5, it is characterized in that: described total electromagnetic switch (6) is the direct solenoid contactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110129202 CN102157927B (en) | 2011-05-18 | 2011-05-18 | Overvoltage protection circuit of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110129202 CN102157927B (en) | 2011-05-18 | 2011-05-18 | Overvoltage protection circuit of engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102157927A CN102157927A (en) | 2011-08-17 |
| CN102157927B true CN102157927B (en) | 2012-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110129202 Active CN102157927B (en) | 2011-05-18 | 2011-05-18 | Overvoltage protection circuit of engine |
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| Country | Link |
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| CN (1) | CN102157927B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104753416A (en) * | 2015-04-03 | 2015-07-01 | 国机重工（常州）挖掘机有限公司 | Voltage stabilizing circuit used for power generator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0377853A2 (en) * | 1989-01-09 | 1990-07-18 | Mitsubishi Denki Kabushiki Kaisha | Control device for a vehicle a.c. generator |
| CN1061369A (en) * | 1990-11-13 | 1992-05-27 | 乌克兰苏维埃主权共和国科学院巴顿电焊研究所 | Independent arc welding appratus |
| CN2826827Y (en) * | 2005-09-29 | 2006-10-11 | 李自祥 | Low-power consumption six wire internal earth voltage regulator with overcurrent and overvoltage protection function |
| CN202125390U (en) * | 2011-05-18 | 2012-01-25 | 江苏友谊汽车有限公司 | Overvoltage protection circuit for engine |
-
2011
- 2011-05-18 CN CN 201110129202 patent/CN102157927B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0377853A2 (en) * | 1989-01-09 | 1990-07-18 | Mitsubishi Denki Kabushiki Kaisha | Control device for a vehicle a.c. generator |
| CN1061369A (en) * | 1990-11-13 | 1992-05-27 | 乌克兰苏维埃主权共和国科学院巴顿电焊研究所 | Independent arc welding appratus |
| CN2826827Y (en) * | 2005-09-29 | 2006-10-11 | 李自祥 | Low-power consumption six wire internal earth voltage regulator with overcurrent and overvoltage protection function |
| CN202125390U (en) * | 2011-05-18 | 2012-01-25 | 江苏友谊汽车有限公司 | Overvoltage protection circuit for engine |
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| Publication number | Publication date |
|---|---|
| CN102157927A (en) | 2011-08-17 |
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