CN201314267Y - Solid type diesel engine starting and preheating relay - Google Patents
Solid type diesel engine starting and preheating relay Download PDFInfo
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- CN201314267Y CN201314267Y CNU2008202249292U CN200820224929U CN201314267Y CN 201314267 Y CN201314267 Y CN 201314267Y CN U2008202249292 U CNU2008202249292 U CN U2008202249292U CN 200820224929 U CN200820224929 U CN 200820224929U CN 201314267 Y CN201314267 Y CN 201314267Y
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Abstract
The utility model belongs to the technical field the diesel engine starting, and relates to a solid type diesel engine starting and preheating relay. The relay consists of an input part, an isolating part and an output part. The relay is characterized by adopting direct-current (DC) input; the isolating part consists of a double-end push-pull self excited oscillation circuit, a transformer, and a rectification and stabilization circuit connected with a secondary coil of the transformer; N (N is greater than or equal to 1) parallel power field effect transistors of the output part form a direct-current (DC) output circuit; the positive electrode of the output of the rectification and stabilization circuit is connected with a grid of the N parallel power field effect transistors; and a quick discharge circuit is connected between the rectification and stabilization circuit and the DC output circuit. The solid type diesel engine starting and preheating relay has the advantages of no moving parts, small input power, long service life, reliable operation, etc.
Description
Affiliated technical field
The utility model belongs to diesel engine starting technique field, relates to a kind of solid type diesel engine starting, preheating relay.
Background technique
The automotive industry of China has obtained significant progress in recent years, each big auto vendor constantly releases various new vehicles to comply with the needs in market, raising along with automotive performance, each auto vendor has also proposed higher requirement to the quality of component, some original component particularly electrical part can't adapt to the performance of new automobile, each auto vendor to more component particularly the performance of electrical part higher requirement has been proposed.
The vehicle starting system comprises switch starter, starter relay, starter motor and preheating auxiliary starting device etc.The starter relay that is used for the diesel engine launching system in the prior art adopts electromagnetic relay, though it has simple in structure, easy to maintenance, low cost and other advantages, but can produce the contact arc spark, and the contact is damaged easily, environmental suitability is poor, the welding phenomenon can occur at big current conditions lower contact especially.Starter relay is the critical component of control diesel engine starting, in case fault has taken place starter relay, diesel engine can't start.
The preheating auxiliary starting device is also very important in the vehicle starting system.Automobile adopts the Preheating unit of preheating relay control that the engine charge air is heated when cold-starting, thereby motor is started smoothly.According to national motor vehicle emission standard second stage restriction (being called for short state II), the flame Preheating unit is adopted in the diesel engine cold-starting, the work of preheating relay control Flame preheating plug, by the flame heating mode, make Engine Inlet Temperature improve 60 ℃～70 ℃, make motor starting smoothly at low temperatures.
According to GB/T18325.3-2005 country motor vehicle emission standard phase III restriction (being called for short state III), further reduced the content of sulphur in the engine exhaust emission, the diesel engine cold-starting adopts the flame Preheating unit can not be suitable for, state III standard diesel engine adopts preheating relay control electronic heater, the electrons heat actuator temperature is risen up to 950 ℃, directly the engine charge air is heated, thereby motor is started smoothly.What generally adopt at present also is electromagnetic relay, and it has simple in structure, easy to maintenance, low cost and other advantages, but can produce the contact arc spark, and the contact damages easily, the welding phenomenon can occur at big current conditions lower contact especially, and environmental suitability is poor.
The change of mode of heating makes the load current of preheating relay produce very big variation, load current has been increased to 150A from 70A, like this preheating relay is also had higher requirement, require preheating relay to work reliably down high-power, electromagnetic relay damages easily owing to the contact, the welding phenomenon can occur at big current conditions lower contact especially, under high power load, more can not work reliably.In case fault has taken place preheating relay,, also just can't realize the cold-starting of diesel engine with uncontrollable electronic heater.
The model utility content
It is little that the purpose of this utility model provides a kind of input power, long service life, the solid type diesel engine starting of reliable operation, preheating relay both can be used for the across-the-line starting diesel engine, can be used to control engine preheating system again, make diesel engine realize cold-starting.
The purpose of this utility model adopts following technological scheme to realize: solid type diesel engine starting provided by the utility model, preheating relay are made up of input, isolated part and output, be characterized in the input of described input part employing direct current, described isolated part is recommended self excited oscillation circuit, transformer and the rectification of joining with transformer secondary output, mu balanced circuit by both-end and is formed; Described output constitutes dc output circuit by N power field effect pipe only in parallel, N 〉=1, the positive pole of described isolated part rectification, mu balanced circuit output connects the only grid of power field effect pipe in parallel of N, is connected to quick discharging circuit between the output of rectification, mu balanced circuit and dc output circuit.
Solid type diesel engine provided by the utility model is started, the preheating relay working principle is as follows: adopt the direct current input, isolated part mainly is made up of vibrator circuit, transformer and the rectification of joining with transformer secondary output, mu balanced circuit.Convert the direct current input to interchange by vibrator circuit after adding the direct current input, adopt transformer isolation, avoid exporting the influence to input, vibrator circuit adopts both-end to recommend self oscillations output, and it more can improve the conversion efficiency of intake than single-ended output.Improve oscillation frequency, transfer speed is fast, the rectification of joining with transformer secondary output, mu balanced circuit with the ac voltage rectifier of transformer output, voltage stabilizing after for the dc output circuit that is made of N power field effect pipe only in parallel provides stable grid voltage, make N power field effect pipe conducting only in parallel export direct current.When the excision input voltage, make the grid of N power field effect pipe in parallel lose voltage, the output power field effect transistor that N is only in parallel turn-offs, cut-out output.Generally, by the control voltage of isolating transformer output to gate capacitance charges to the required time of power field effect pipe conducting be very fast, generally in 10 μ S, after removing control voltage, because grid capacitance lacks discharge loop, the velocity of discharge is very slow, make the field effect transistor turn-off time very long, tens ms even hundreds of ms have been reached, in this case, switching loss is very big, for powerful output loading, is easy to damage, the utility model is in rectification, the quick discharging circuit that is connected between mu balanced circuit and dc output circuit is that the velocity of discharge has been improved in the loop that the grid capacitance of power field effect pipe is provided with a repid discharge, output is turn-offed rapidly, improved the turn-off speed of field effect transistor, reduced its switching loss.
The utility model is owing to adopted the dc output circuit that is made of N power field effect pipe only in parallel, power field effect pipe belongs to voltage-controlled conduction device, the control electric current is minimum, the output-current rating of power field effect pipe can be accomplished very big, and internal resistance is less, when needs switch the load of bigger electric current, only need to adopt by mode and realize that output gets final product a plurality of power field effect pipe parallel connections, a plurality of power field effect pipe parallel connections can further reduce internal resistance again.The solid type diesel engine is started like this, the preheating relay output voltage falls will be very low, and the power consumption of entire product is also just very little.Again because the vibrator circuit of isolated part adopts both-end to recommend self excited oscillation circuit, it more can improve the conversion efficiency of intake than single-ended output, so this solid type diesel engine starting, the required direct current input power of preheating relay is little, simultaneously, in rectification, the quick discharging circuit that is connected between mu balanced circuit and dc output circuit is that the velocity of discharge has been improved in the loop that the grid capacitance of power field effect pipe is provided with a repid discharge, make after the direct current input is cut off in the diesel engine starting, the field effect transistor that constitutes dc output circuit can turn-off rapidly, improved turn-off speed, reduce switching loss, improved reliability of products.Solid type diesel engine starting provided by the utility model, preheating relay both can be used for the across-the-line starting diesel engine, can be used to control engine preheating system again, made diesel engine realize cold-starting.The quantity that only need change the power field effect pipe parallel connection according to the power requirements of output loading gets final product.Because this relay is all electronic circuit control, do not have mechanical contact and solved that electromagnetic switching relay is easy to generate the contact arc spark in the conventional art, and the contact is damaged easily, the problem that can occur the welding phenomenon especially at big current conditions lower contact has advantages such as environmental suitability is strong, reliable operation, life-span length.
Description of drawings
Fig. 1 provides the starting of solid type diesel engine, an embodiment's of preheating relay electrical schematic diagram for the utility model;
Fig. 2 starts for the utility model provides the solid type diesel engine, the wiring diagram when preheating relay is done preheating relay;
Fig. 3 starts for the utility model provides the solid type diesel engine, the wiring diagram when preheating relay is made starter relay;
Fig. 4 starts for the utility model provides the solid type diesel engine, the wiring diagram when preheating relay is made the auxiliary starter auxiliary reclay.
Embodiment
Below in conjunction with description of drawings enforcement of the present utility model.Fig. 1 provides the starting of solid type diesel engine, an embodiment's of preheating relay electrical schematic diagram for the utility model.Referring to Fig. 1: this solid type diesel engine starting, preheating relay are made up of input part, isolated part and output, the input part by DC input voitage, current-limiting resistance R1, protect diode V1 and reference diode V2 to constitute; Isolated part adopts by transistor V3, V4, and the both-end that resistance R 2, R3, capacitor C 1, C2 constitute is recommended self excited oscillation circuit, transformer T1 and is made up of the rectification, the mu balanced circuit that constitute with T1 time grade of two commutation diode V5, V6, voltage-stabiliser tube V7 and resistance R 4, R5 that joins of transformer; Output is the dc output circuit that power field effect pipe V11, V12, V13, the V14 by four parallel connections constitutes, and the positive pole of rectification, mu balanced circuit output connects the grid of power field effect pipe in parallel.In this embodiment in the rectification of isolated part, be connected between mu balanced circuit and dc output circuit by transistor V8, V9, diode V10, the quick discharging circuit that resistance R 6 constitutes, described rectification, the positive pole of mu balanced circuit output meets power field effect pipe V11 in parallel by diode V10, V12, V13, the grid of V14, the collector electrode of transistor V8 and transistor V9 base stage connect the positive pole of diode V10, the base stage of transistor V8 and transistor V9 collector electrode are by resistance R 6 ground connection, the grounded-emitter connection of transistor V8, the emitter of transistor V9 meet power field effect pipe V11 in parallel, V12, V13, the grid of V14.
Working principle is: the input part provides DC input voitage by storage battery, and reference diode V2 provides galvanic current to press to subsequent conditioning circuit, and the setting of protection diode V1 is the damage of avoiding causing because of wiring error relay.Isolated part is by transistor V3, V4, resistance R 2, R3, capacitor C 1, the both-end that C2 constitutes is recommended after self excited oscillation circuit becomes the VDC of input part alternating voltage and adopt transformer T1 coupling to isolate, by two commutation diode V5 that join with transformer T1 time level, V6, voltage-stabiliser tube V7 and resistance R 2, the R3 rectification, after the voltage stabilizing power field effect pipe V11 in parallel that constitutes dc output circuit, V12, V13, V14 provides stable direct current grid voltage, make power field effect pipe conducting in parallel, output D.C. high-current across-the-line starting diesel engine or preheating electronic heater are realized the cold-starting of diesel engine.After the diesel engine starting, the excision input voltage at this moment, makes the grid of power field effect pipe V11, V12, V13, V14 lose voltage, and output power field effect transistor V11, V12, V13, V14 are turn-offed.Generally, by the control voltage of isolated part output to gate capacitance charges to the required time of power field effect pipe conducting be very fast, generally in 10 μ S, remove control voltage after, because grid capacitance lacks discharge loop, the velocity of discharge is very slow, makes the power field effect pipe turn-off time very long, has reached tens ms even hundreds of ms, in this case, switching loss is very big, for powerful output loading, is easy to damage.At above-mentioned situation, in circuit by transistor V8, V9, diode V10, the quick discharging circuit that resistance R 6 constitutes improves the velocity of discharge, accelerated the turn-off time, after its working procedure is the excision input voltage, when the voltage at voltage-stabiliser tube V7 two ends drops to the low 0.7V of specific power fet gate voltage, transistor V9 conducting, grid capacitance is by transistor V9, the be knot of V8, resistance R 6 discharges make transistor V8 conducting, and voltage-stabiliser tube V7 both end voltage is further descended, form positive feedback, output is turn-offed rapidly, improved turn-off speed, reduced switching loss.Add the discharge prevention loop in the starting of solid type diesel engine, the preheating relay, made load switch rapid, generally in 50 μ S.The preheating of electromagnetic type diesel engine or starter relay are incomparable in this.
Isolating transformer T1 magnetic core is a Primary Component of this circuit among this embodiment, is directly connected to the characteristic and the conversion efficiency of circuit.According to the characteristics of material behavior and this circuit, adopted Mn-Zn high magnetic conductivity ferrite material as magnetic core of transformer.When selecting Ferrite Material, to consider following several aspect:
(1) permeability and saturation flux density want high, can reduce coil turn, reduce internal resistance, reduce the volume of magnet ring;
(2) coercivity is little, reduces hysteresis loss;
(3) specific resistance wants high, reduces eddy current loss;
(4) choose reasonable Curie temperature, the combination property of raising magnet ring.
Power-ourput device is selected many power field effect pipe parallel connections for use in the dc output circuit of solid type diesel engine starting provided by the utility model, preheating relay, the quantity of power field effect pipe parallel connection can be determined according to output loading, also the power field effect die can be adopted.It is 150A that solid type diesel engine starting among the embodiment shown in Figure 1, preheating relay are used as the preheating relay output load current, and output adopts the V-MOS power field effect pipe parallel way of 4 SUP75N06-08 to realize.Change into 6 identical power field effect pipe parallel connections as dc output circuit output, output load current can reach 200A and can be used to do starter relay, the across-the-line starting diesel engine, the output power device also can not use production tube of the same type, directly use field effect tube chip, a kind of IXFD170N10-9X chip that is to use needs two; Another kind is to use IXFD340N07-9Y to need a chip.Using the benefit of chip mainly is to be beneficial to heat radiation, reduces small product size.Solid type diesel engine provided by the utility model starting, the wiring skeleton diagram was as shown in Figure 2 when preheating relay was used for doing preheating relay, solid type diesel engine preheating relay makes diesel engine realize cold-starting by the control engine preheating system.Solid type diesel engine provided by the utility model starting, the wiring skeleton diagram was as shown in Figure 3 when preheating relay was used for making starter relay, solid type diesel engine starter relay is installed in the starter motor control circuit of diesel engine, by the break-make of the break-make of starter relay control starter relay circuit, starter motor is restarted diesel engine.
Solid type diesel engine starting provided by the utility model, preheating relay also can be used to do the auxiliary reclay of auxiliary starter, and wiring diagram as shown in Figure 4.Because the input power of electromagnetism starter relay is relatively large, and the output power that existing central unit ECU can provide does not satisfy the input power of electromagnetic type starter relay, here play the effect of conversion by auxiliary reclay, central unit ECU can directly control the input of auxiliary reclay, and the auxiliary reclay output current can satisfy the power requirements of electromagnetism starter relay fully.The auxiliary reclay circuit theory is identical with preheating relay, can be according to the model and the quantity of the field effect transistor that power selection is used of output loading.
Claims (3)
1, a kind of solid type diesel engine starting, preheating relay, form by input, isolated part and output, it is characterized in that the input of described input part employing direct current, described isolated part is recommended self excited oscillation circuit, transformer and the rectification of joining with transformer secondary output, mu balanced circuit by both-end and is formed; Described output constitutes dc output circuit by N power field effect pipe only in parallel, N 〉=1, the positive pole of described isolated part rectification, mu balanced circuit output connects the only grid of power field effect pipe in parallel of N, is connected to quick discharging circuit between the output of rectification, mu balanced circuit and dc output circuit.
2, solid type diesel engine starting according to claim 1, preheating relay, the both-end that it is characterized in that described isolated part is recommended self excited oscillation circuit by transistor (V3, V4), resistance (R2, R3), electric capacity (C1, C2) constitute, and the output that both-end is recommended self excited oscillation circuit connects the elementary of transformer (T1).
3, solid type diesel engine starting according to claim 1 and 2, preheating relay, it is characterized in that in described rectification, the quick discharging circuit that is connected between mu balanced circuit and dc output circuit is by transistor (V8, V9), diode (V10), resistance (R6) constitutes, described rectification, the positive pole of mu balanced circuit output connects the only grid of power field effect pipe in parallel of N by diode (V10), the collector electrode of transistor (V8) and transistor (V9) base stage connect the positive pole of diode (V10), the base stage of transistor (V8) and transistor (V9) collector electrode are by resistance (R6) ground connection, the grounded-emitter connection of transistor (V8), the emitter of transistor (V9) connect the only grid of power field effect pipe in parallel of N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202249292U CN201314267Y (en) | 2008-11-28 | 2008-11-28 | Solid type diesel engine starting and preheating relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202249292U CN201314267Y (en) | 2008-11-28 | 2008-11-28 | Solid type diesel engine starting and preheating relay |
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| Publication Number | Publication Date |
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| CN201314267Y true CN201314267Y (en) | 2009-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008202249292U Expired - Fee Related CN201314267Y (en) | 2008-11-28 | 2008-11-28 | Solid type diesel engine starting and preheating relay |
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| CN (1) | CN201314267Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496914A (en) * | 2011-12-20 | 2012-06-13 | 信息产业部电子第四十研究所华成高新技术公司 | Preheating relay preventing short-circuit failure |
| CN103746559A (en) * | 2012-11-23 | 2014-04-23 | 安徽省智纯动力科技有限公司 | Large-power DC controller possessing active and passive safety protection functions |
| CN114675625A (en) * | 2022-03-21 | 2022-06-28 | 潍柴动力股份有限公司 | Controller control method and device |
-
2008
- 2008-11-28 CN CNU2008202249292U patent/CN201314267Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496914A (en) * | 2011-12-20 | 2012-06-13 | 信息产业部电子第四十研究所华成高新技术公司 | Preheating relay preventing short-circuit failure |
| CN103746559A (en) * | 2012-11-23 | 2014-04-23 | 安徽省智纯动力科技有限公司 | Large-power DC controller possessing active and passive safety protection functions |
| CN114675625A (en) * | 2022-03-21 | 2022-06-28 | 潍柴动力股份有限公司 | Controller control method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090923 Termination date: 20161128 |