CN104377656A - Automobile engine circuit with overload delay start function - Google Patents
Automobile engine circuit with overload delay start function Download PDFInfo
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- CN104377656A CN104377656A CN201410700341.XA CN201410700341A CN104377656A CN 104377656 A CN104377656 A CN 104377656A CN 201410700341 A CN201410700341 A CN 201410700341A CN 104377656 A CN104377656 A CN 104377656A
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Abstract
The invention discloses an automobile engine circuit with the overload delay start function. The automobile engine circuit comprises a sampling module, a switching tube, an output bias module connected with the switching tube, a driving circuit connected with the output bias module, a delay start module connected with the sampling module and a release module connected with the delay start module, wherein the sampling module and the switching tube are connected with an engine coil, and the delay start module is connected with the driving circuit through an OR gate. A switching signal of the driving module controls switch-off or switch-on of the switching tube through the output bias module, and the sampling module samples the voltage of the engine coil in real time; when overloading occurs, the delay start module is started, and then the switching tube is controlled to be switched off through the Or gate and the driving module in sequence so that the phenomenon that the engine coil is burnt out due to long-term overloading can be avoided; when the release module finishes discharging, the delay start module sends a low level signal, and the switching tube is controlled to be switched on again through the Or gate and the driving module so that the phenomenon that the switching tube does not work due to long-term switch-off can be avoided.
Description
Technical field
The present invention relates to a kind of automobile engine circuit with overload delay start, belong to field of switch power, particularly relate to the control circuit to engine or tranformer protection.
Background technology
The progress of the traction of social demand, the promotion of policies and regulations and technology has impelled developing rapidly of modern automobile industry.And along with further developing of auto industry and being gradually improved and strengthening of the various regulations of regarding Car, the requirement of people to automotive performance index is more and more higher, such as, not only require that power is high, moment of torsion is large, oil consumption is low, it is little to pollute, and require that fail safe is good, comfortableness is good, reliability is high and with low cost etc.
The large multiplex discrete device of traditional automobile engine circuit is made, and protective circuit is less, and reliability is poor, and as shown in Figure 1, this circuit is not protected engine, and just likely burn once engine overload or block, the loss brought is larger.
In view of this, the present inventor studies this, and develop a kind of automobile engine circuit with overload delay start specially, this case produces thus.
Summary of the invention
The object of this invention is to provide a kind of automobile engine circuit with overload delay start, when motor winding overload or the short circuit of engine, closing switch pipe, delay start after waiting overload to remove, to prevent burn-down of electric motor, improves whole aircraft reliability.
To achieve these goals, solution of the present invention is:
A kind of automobile engine circuit with overload delay start, comprise the sampling module and switching tube that are connected with engine coil, the output offset module be connected with switching tube, the drive circuit be connected with output offset module, the delay start module be connected with sampling module, and the release module to be connected with delay start module, described delay start module by or door be connected with drive circuit; The switching signal of driver module passes through the disconnection or closed of biasing module control switch pipe, the voltage of sampling module real-time sampling engine coil, when overload occurs, open delay start module, and then successively by or door, driver module control switch pipe disconnect, after release module electric discharge terminates, delay start module sends low level signal, again by or door and driver module control switch pipe close.
As preferably, above-mentioned sampling module comprises the sampling resistor, sampling diode and the sampling capacitance that are connected successively, and sampling module detects engine coil load in real time, and by sampling resistor, sampling diode, reaches sampling capacitance by the information whether coil transships.
As preferably, described output offset module first biasing resistor, the second biasing resistor, the 3rd biasing resistor and bias diode, first biasing resistor is connected with the positive pole of sampling diode with the tie point of the second biasing resistor, bias diode one end ground connection, the other end connects the first biasing resistor and the 3rd biasing resistor simultaneously, and the other end of described 3rd biasing resistor is connected with drive circuit.Biasing module is mainly used in as sampling module provides an initial bias.
As preferably, described drive circuit comprises control chip, and first driving tube in parallel with control chip and the second driving tube, the signal input part of control chip with or door be connected, the output switching signal driving switch pipe work in turn of the first driving tube of driver module and the second driving tube.
As preferably, described delay start module mainly comprises the comparison amplifier be connected with sampling diode cathode, the output of comparison amplifier is connected with storage capacitance on the one hand by triode, on the other hand by postpone triode and delay resistance with or the input of door be connected.
As preferably, described release module comprise be connected with storage capacitance first discharge resistance, discharge with first the release triode that resistance is connected, and be connected with release transistor base second discharges resistance, release module is mainly used in the electricity of release storage capacitance.
The operation principle of the automobile engine circuit of above-mentioned band overload delay start: sampling module detects generator coil load in real time, pass through sampling resistor, sampling diode, the information whether coil transships is reached sampling capacitance, and simultaneously the first biasing resistor of output offset module, the second biasing resistor, the 3rd biasing resistor and bias diode provide initial information to sampling capacitance.When generator coil is normal, switching tube is in switch working state, and the voltage on sampling capacitance is low level, and delay start module exports as low level, and driver module normally works; When generator coil transships, voltage on sampling capacitance is high level, by delay start module, the voltage in storage capacitance is made to be high level, and then pass through or door, drive circuit on-off switching tube, after getting rid of for preventing coil fault, switching tube disconnects for a long time and not working, release module is increased at the output of delay start module, by the first release resistance, release triode and the second release resistance, storage capacitance is discharged when switching tube grid is high level, after electric discharge terminates (after namely coil fault is removed), switching tube opens normal work again.
Compared with prior art, the automobile engine circuit of the band overload delay start of said structure, by detecting the voltage on engine coil, dynamically be reacted on sampling capacitance, by delay start module, stored charge in storage capacitance, and then control driving tube, thus avoid motor coil long term overloading and burn; The electric charge that storage capacitance is stored is more, and the turn-off time of driving tube is also longer, the delay start time needed for being obtained, avoids switching tube to disconnect for a long time and does not work by the large I of adjustment storage capacitance.
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is automobile engine partial circuit figure of the prior art;
Fig. 2 is the automobile engine circuit diagram of the band overload delay start of the present embodiment.
Embodiment
As shown in Figure 2, a kind of automobile engine circuit with overload delay start, comprise the sampling module 1 and switching tube M0 that are connected with engine coil L0, the output offset module 2 be connected with switching tube M0, the drive circuit 3 be connected with output offset module 2, the delay start module 4 be connected with sampling module 1, and the release module 5 be connected with delay start module 4, described delay start module 4 passes through or door is connected with drive circuit 3.
In the present embodiment, described sampling module 1 comprises the sampling resistor R0, the sampling diode D0 and sampling capacitance C0 that are connected successively, and sampling module detects Transmitter coil load in real time; Described output offset module 2 first biasing resistor R13, the second biasing resistor R32, the 3rd biasing resistor R12 and bias diode D3, first biasing resistor R13 is connected with the positive pole of sampling diode D0 with the tie point of the second biasing resistor R32, bias diode D3 one end ground connection, the other end connects the first biasing resistor R13 and the 3rd biasing resistor R12 simultaneously, and the other end of described 3rd biasing resistor R12 is connected with drive circuit.Output offset module 2 is mainly used in as sampling module 1 provides an initial bias.
Described drive circuit 3 comprises control chip control, and the first driving tube Q11 in parallel with control chip control output and the second driving tube Q12, the signal input part of control chip control with or door be connected, the first driving tube Q11 of driver module 3 and the second driving tube Q12 in turn output switching signal driving switch pipe M0 works.
Described delay start module 4 mainly comprises the comparison amplifier AMP1 be connected with sampling diode cathode D0, the output of comparison amplifier AMP1 is connected with storage capacitance Cext by triode Q66 mono-aspect, on the other hand by postpone triode Q16 and delay resistance R31 with or the input of door be connected, in the present embodiment, described delay start module 4 comprises the benchmark VREF2 that inverter is powered further, reference voltage V REF1.Described release module 5 comprise be connected with storage capacitance Cext first discharge resistance R30, the release triode Q65 that resistance R30 is connected is discharged with first, and to be connected with release triode Q65 base stage second discharges resistance R29, release module 5 is mainly used in the electricity of release storage capacitance Cext.
The operation principle of the automobile engine circuit of above-mentioned band overload delay start: sampling module 1 detects generator coil load in real time, by sampling resistor R0, sampling diode D0, the information whether coil L0 transships is reached sampling capacitance C0, meanwhile, the first biasing resistor R13, the second biasing resistor R32 of output offset module 2, the 3rd biasing resistor R12 and bias diode D3 provide initial information to sampling capacitance C0.When generator coil L0 is normal, switching tube M0 is in switch working state, and the voltage on sampling capacitance C0 is low level, and delay start module exports as low level, and driver module 3 normally works, when generator coil L0 transships, voltage on sampling capacitance C0 is high level, by delay start module 4, the voltage on storage capacitance Cext is made to be high level, and then pass through or door, drive circuit on-off switching tube M0, after getting rid of for preventing coil fault, switching tube disconnects for a long time and not working, release module 5 is increased at the output of delay start module, by the first release resistance R29 when switching tube M0 grid is high level, release triode Q65 and second release resistance R30 discharges to storage capacitance Cext, after electric discharge terminates (after namely coil fault is removed), switching tube M0 opens normal work again.The operating time of release module 5 controls primarily of the accumulate capacity of storage capacitance Cext, according to the time that failture evacuation needs, carrys out the size of corresponding selection storage capacitance Cext, and then can control the delay start time.
Above-described embodiment and graphic and non-limiting product form of the present invention and style, any person of an ordinary skill in the technical field, to its suitable change done or modification, all should be considered as not departing from patent category of the present invention.
Claims (6)
1. the automobile engine circuit with overload delay start, it is characterized in that: comprise the sampling module and switching tube that are connected with engine coil, the output offset module be connected with switching tube, the drive circuit be connected with output offset module, the delay start module be connected with sampling module, and the release module to be connected with delay start module, described delay start module by or door be connected with drive circuit; The switching signal of driver module passes through the disconnection or closed of biasing module control switch pipe, the voltage of sampling module real-time sampling engine coil, when overload occurs, open delay start module, and then successively by or door, driver module control switch pipe disconnect, after release module electric discharge terminates, delay start module sends low level signal, again by or door and driver module control switch pipe close.
2. a kind of automobile engine circuit with overload delay start as claimed in claim 1, it is characterized in that: described sampling module comprises the sampling resistor, sampling diode and the sampling capacitance that are connected successively, sampling module detects engine coil load in real time, pass through sampling resistor, sampling diode, reaches sampling capacitance by the information whether coil transships.
3. a kind of automobile engine circuit with overload delay start as claimed in claim 1, it is characterized in that: described output offset module first biasing resistor, the second biasing resistor, the 3rd biasing resistor and bias diode, first biasing resistor is connected with the positive pole of sampling diode with the tie point of the second biasing resistor, bias diode one end ground connection, the other end connects the first biasing resistor and the 3rd biasing resistor simultaneously, and the other end of described 3rd biasing resistor is connected with drive circuit.
4. a kind of automobile engine circuit with overload delay start as claimed in claim 1, it is characterized in that: described drive circuit comprises control chip, and first driving tube in parallel with control chip and the second driving tube, the signal input part of control chip with or door be connected, the output switching signal driving switch pipe work in turn of the first driving tube of driver module and the second driving tube.
5. a kind of automobile engine circuit with overload delay start as claimed in claim 1, it is characterized in that: described delay start module mainly comprises the comparison amplifier be connected with sampling diode cathode, the output of comparison amplifier is connected with storage capacitance on the one hand by triode, on the other hand by postpone triode and delay resistance with or the input of door be connected.
6. a kind of automobile engine circuit with overload delay start as claimed in claim 1, it is characterized in that: described release module comprise be connected with storage capacitance first discharge resistance, the release triode that resistance is connected is discharged with first, and to be connected with release transistor base second discharge resistance, release module is mainly used in the electricity of release storage capacitance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410700341.XA CN104377656B (en) | 2014-11-28 | 2014-11-28 | Automobile engine circuit with overload delay start |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410700341.XA CN104377656B (en) | 2014-11-28 | 2014-11-28 | Automobile engine circuit with overload delay start |
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| CN104377656A true CN104377656A (en) | 2015-02-25 |
| CN104377656B CN104377656B (en) | 2018-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410700341.XA Active CN104377656B (en) | 2014-11-28 | 2014-11-28 | Automobile engine circuit with overload delay start |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3814251C1 (en) * | 1988-04-27 | 1989-06-22 | Bicc-Vero Elektronics Gmbh, 2800 Bremen, De | Protective circuit for capacitive loads |
| CN103178498A (en) * | 2011-12-20 | 2013-06-26 | 科勒公司 | Overvoltage protection system and method |
| CN103972869A (en) * | 2014-04-18 | 2014-08-06 | 深圳市诺比邻科技有限公司 | Dual-protection system and method for batteries |
| CN204230866U (en) * | 2014-11-28 | 2015-03-25 | 绍兴芯谷科技有限公司 | The automobile engine circuit of band overload delay start |
-
2014
- 2014-11-28 CN CN201410700341.XA patent/CN104377656B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3814251C1 (en) * | 1988-04-27 | 1989-06-22 | Bicc-Vero Elektronics Gmbh, 2800 Bremen, De | Protective circuit for capacitive loads |
| CN103178498A (en) * | 2011-12-20 | 2013-06-26 | 科勒公司 | Overvoltage protection system and method |
| CN103972869A (en) * | 2014-04-18 | 2014-08-06 | 深圳市诺比邻科技有限公司 | Dual-protection system and method for batteries |
| CN204230866U (en) * | 2014-11-28 | 2015-03-25 | 绍兴芯谷科技有限公司 | The automobile engine circuit of band overload delay start |
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| CN104377656B (en) | 2018-04-10 |
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