CN101871532A - Misoperation suppression system of power takeoff - Google Patents
Misoperation suppression system of power takeoff Download PDFInfo
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- CN101871532A CN101871532A CN201010214503A CN201010214503A CN101871532A CN 101871532 A CN101871532 A CN 101871532A CN 201010214503 A CN201010214503 A CN 201010214503A CN 201010214503 A CN201010214503 A CN 201010214503A CN 101871532 A CN101871532 A CN 101871532A
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Abstract
The invention discloses a misoperation suppression system of power takeoff, comprising a misoperation suppression controller, a power taking operation switch, a main tank neutral position switch, a vehicle power and a power taking solenoid valve, wherein the output of the power taking operation switch and the output of the main tank neutral position switch are respectively connected with the input end of the misoperation suppression controller so as to output the operation order and judge the state of the speed changing box; the output end of the misoperation suppression controller is connected with the power taking solenoid valve so as to output a control order; and the vehicle power is respectively connected with the input end of the power taking operation switch and the power end of the misoperation suppression controller to serve as the power supply. The invention suppresses the misoperation of the power takeoff and lowers adverse effect because of misoperation. The electronic controller collects the signals of the main tank neutral position switch of the speed changing box, the signal of the power taking operation switch and the signal of the power taking solenoid valve to judge the operation of a driver, if the operation is right, the electronic controller permits the driver to pass, if the operation is wrong, the system automatically locks to keep the original state.
Description
Technical field
What the present invention relates to is a kind of device of automotive transmission technical field, specifically is a kind of misoperation suppression system of power takeoff.
Background technique
Existing automobile power take-off device generally is divided into driving power taking and parking power taking two big classes.The driving power taking, promptly gearbox is put at the neutral gear and the gear that travels and can both be carried out the power taking operation.And the parking power takeoff must be connected disconnection to transmission system with the power of live axle when carrying out power taking, recovers transmission system immediately and be connected with the power of live axle in not power taking.On the heavy gearbox that generally is contained in the major-minor box structure of parking power takeoff power take-off.When power taking, the disconnection that is connected of odd-side and live axle, main tank is hung as required into gear and is carried out power taking.When disconnecting power taking, when the recovery odd-side was connected with the power of live axle, main tank must disconnect its mechanical connection, promptly hung neutral gear, disconnected the inertia of Engine torque and the transmission system gear train of main tank own, impacted to reduce odd-side.
At the power take-off of parking power taking class in actual use, two kinds of common misoperations are arranged: the one, the driver seeks easy, does not hang at main tank under the situation of neutral gear and directly closes power take-off, has caused odd-side to impact and beats tooth, has reduced the gearbox life-span; The 2nd, in the power taking process, not that power take-off is closed in the misoperation of subjective desire, cause power taking to interrupt, vehicle moves, and causes unnecessary accident.Misoperation of the present invention is installed suppresses to have only the driver to hang under the situation of neutral gear after the controller, just allow it to close power take-off, otherwise the power take-off self-locking; Promptly wanting to close power take-off as the driver, must be just can finish under power taking switch and the gear condition situation about all satisfying, and has not only protected gearbox, and has suppressed the power take-off of closing of non-subject intent from technical standpoint.
Summary of the invention
There is the present situation of misoperation in pin automobile power take-off of the present invention, and a kind of misoperation suppression system of power takeoff is provided, and the misoperation of power take-off is suppressed, and reduces the misoperation adverse effect.Suppress signal, power taking operation switching signal and the power taking solenoid valve signal that controller is gathered gearbox main tank neutral switch by misoperation, driver's operation is judged, correctly then let pass, mistake, then system's self-locking keeps original state.When preventing misoperation, in order to prevent the generation of solenoid valve short-circuit conditions, this misoperation restraining device has been equipped short-circuit protection function simultaneously.In order to prevent that the circuit polarities that may occur in entrucking in batches or the maintenance from connecing situations such as reversal connection mistake, electronic type misoperation of the present invention suppresses controller and also has the wiring error protection.
The present invention is achieved by the following technical solutions, the present invention includes: misoperation suppresses controller, power taking operating switch, main tank neutral switch, vehicle power and power taking solenoid valve, wherein: the output of power taking operating switch and main tank neutral switch is connected with the input operation instruction with the input end of misoperation inhibition controller respectively and judges the gearbox state, the output terminal that misoperation suppresses controller is connected with the power taking solenoid valve with the output control command, and vehicle power connects power taking operating switch input end respectively and misoperation suppresses the power end of controller as the power supply source.
Described misoperation suppresses comprising of controller: power supply processing module; first input processing module; second input processing module; logic processing module; valve control output module and short-circuit protection module; wherein: the input end of power supply processing module is connected with vehicle power; the output terminal of power supply processing module is out-put supply to the second input processing module circuit respectively; logical circuit and valve control output circuit; the input end of first input processing module and second puocessing module links to each other with neutral position switch with the power taking operating switch respectively and exports power taking signal and neutral signal respectively to logic processing module; the input end of short-circuit protection module is connected with logic processing module with valve control output module respectively with output terminal and sample rate current is converted into short-circuit signal output; logic processing module is according to the power taking signal of receiving; neutral signal and short-circuit signal delivery valve control signal are to valve control output module; the output terminal of valve control output module is connected with the power taking solenoid valve and exports control command, is provided with current sampling resistor in the valve control output module and its sample rate current end is connected with the short-circuit protection module.
The sample rate current of the input end receiving valve control output module of described short-circuit protection module exports comparative result to logic processing module as short-circuit signal after sample rate current and protective current are compared.
Described power supply processing module comprises: the first counnter attack diode, surge pipe, overvoltage protection pipe logic supply voltage protection voltage-stabiliser tube; wherein: the input end of the first counnter attack diode and overvoltage protection pipe is connected with vehicle power positive pole and vehicle power negative pole respectively; the output terminal of the first counnter attack diode and overvoltage protection pipe is connected to the input end of surge pipe and the 24V output terminal of power supply processing module, and the output terminal of surge pipe is as the 5V output terminal of power supply processing module and which is provided with logic supply voltage protection voltage-stabiliser tube.
Described first input processing module comprises: three counnter attack diodes; two divider resistances; first low-pass filter circuit; two the voltage protection diodes and first scmitt trigger circuit; wherein: the second counnter attack diode and the 3rd counnter attack diode lay respectively at the input end and the output terminal of first input processing module; the bleeder circuit that the first voltage protection diode and first divider resistance and second divider resistance constitute is parallel to the two ends of the second counnter attack diode and the second counnter attack diode respectively; the input end of first low-pass filter circuit is connected with the input end of second divider resistance and the input end of first scmitt trigger circuit respectively with output terminal; the input end of first scmitt trigger circuit is provided with the second voltage protection diode; be provided with the 4th counnter attack diode between the output terminal of the grounding end of first low-pass filter circuit and second divider resistance, the output terminal of first scmitt trigger circuit is connected with logic processing module and exports the power taking signal.
Described second input processing module comprises: three current limliting divider resistances, second low-pass filter circuit, the voltage-stabiliser tube and second scmitt trigger circuit, wherein: the two ends of the first current limliting divider resistance are connected with an end of neutral position switch and the output terminal of power supply processing module respectively, the two ends of the second current limliting divider resistance are connected with the other end of neutral position switch and the input end of second low-pass filter circuit respectively, the output terminal of second low-pass filter circuit is connected with the input end of second scmitt trigger circuit, be provided with the 3rd lower pass-filter resistance between the input end of the second lower pass-filter electric capacity and the grounding end, the input end of second scmitt trigger circuit is provided with voltage-stabiliser tube, and the output terminal of second scmitt trigger circuit is connected with logic processing module and exports the neutral signal.
Described valve control output module comprises: the switch type field effect transistor; two divider resistances; current sampling resistor; two voltage protection diodes; fly-wheel diode and the 5th counnter attack diode; wherein: the 3rd divider resistance and the 4th divider resistance of connecting with it are connected between the output terminal of the output terminal of power supply processing module and logic processing module; the two ends that the two ends of tertiary voltage protection diode and the grid of switch type field effect transistor and drain electrode are parallel to the 3rd divider resistance respectively; the two ends of current sampling resistor are connected with the source electrode and the power taking solenoid valve of switch type field effect transistor respectively; the two ends of the 4th voltage protection diode are connected with the drain electrode of switch type field effect transistor and the positive pole of power taking solenoid valve respectively; fly-wheel diode is connected in the positive and negative polarities of power taking solenoid valve; one end ground connection of the 5th counnter attack diode, the other end is connected with the negative pole of power taking solenoid valve.
The comparator that comprises two cascades of described short-circuit protection module.
The present invention carries out work in the following manner: at first enter non-power taking state after system powers on.Under the working state of non-power taking, when detect the power taking switching signal effectively after, system changes the power taking state over to.After entering the power taking state, at first control output power taking solenoid valve is monitored output current immediately, in case output current surpasses setting value, the output of short-circuit protection module cut-off valve control makes valve control output invalid, and controller enters the short-circuit protection state.If be not short-circuited, situation such as excess current, whether logic analysis module monitoring power taking switch closes, if do not close, continues to keep the power taking state; Whether if the power taking switch cuts out, it is effective then to inquire about neutral switch.If neutral switch is invalid, justification function person does not make the gearbox shelves that make the return trip empty in accordance with regulations earlier, and the request that disconnects power taking is invalid, and logic module maintaining valve control output remains in the power taking state.If neutral switch is effective, to close the request of power take-off and can let pass, valve control output is closed, power taking solenoid valve dead electricity, power take-off disconnects power taking, and system comes back to non-power taking state.After controller enters the short-circuit protection state, under the situation that the power taking instruction does not have to cancel (being the power taking switch opens), controller will remain on the short-circuit protection state always.Close when power taking request switch, controller withdraws from the short-circuit protection state, enters non-power taking state, for checking circuit and preparing power taking next time.
The present invention suppresses controller by the electronics misoperation, has suppressed driver's subject intent or unintentional misoperation, protects gearbox, prevents the human accident of some non-subject intents.
Description of drawings
Fig. 1 is a system schematic of the present invention.
Fig. 2 is a controlling method flow chart of the present invention.
Fig. 3 is the power supply processing module schematic representation.
Fig. 4 is the first input processing module schematic representation.
Fig. 5 is the second input processing module schematic representation.
Fig. 6 is a valve control output module schematic representation.
Fig. 7 is the short-circuit protection module diagram.
Embodiment
Below embodiments of the invention are elaborated, present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed mode of execution and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, present embodiment comprises: power taking operating switch 1, main tank neutral switch 2, misoperation suppress controller 3, vehicle power 4 and power taking solenoid valve 5, wherein: the output of power taking operating switch 1 and main tank neutral switch 2 is connected with the input operation instruction with the input end of misoperation inhibition controller 3 respectively and judges the gearbox state, the output terminal that misoperation suppresses controller 3 is connected with power taking solenoid valve 5 with the output control command, and vehicle power 4 connects power taking operating switch 1 input end respectively and misoperation suppresses the power end of controller 3 as the power supply source.
Described misoperation suppresses comprising of controller 3: power supply processing module 6; first input processing module 7; second input processing module 8; logic processing module 9; valve control output module 10 and short-circuit protection module 11; wherein: the input end of power supply processing module 6 is connected with vehicle power 4; the output terminal of power supply processing module 6 is out-put supply to the second input processing module 8 circuit respectively; logical circuit and valve control output circuit; the input end of first input processing module 7 and second puocessing module links to each other with neutral position switch with power taking operating switch 1 respectively and exports power taking signal and neutral signal respectively to logic processing module 9; the input end of short-circuit protection module 11 is connected with logic processing module 9 with valve control output module 10 respectively with output terminal and sample rate current is converted into short-circuit signal output; logic processing module 9 is according to the power taking signal of receiving; neutral signal and short-circuit signal delivery valve control signal are to valve control output module 10; the output terminal of valve control output module 10 is connected with power taking solenoid valve 5 and exports control command, is provided with current sampling resistor in the valve control output module 10 and its sample rate current end is connected with short-circuit protection module 11.
The sample rate current of the input end receiving valve control output module 10 of described short-circuit protection module 11 exports comparative result to logic processing module 9 as short-circuit signal after sample rate current and protective current are compared.
Described power supply processing module 6 comprises: counnter attack diode D1, surge pipe Q1, overvoltage protection pipe D12 and logic supply voltage protection voltage-stabiliser tube D13; wherein: the input end of counnter attack diode D1 and overvoltage protection pipe D12 is connected with vehicle power 4 positive poles and vehicle power 4 negative poles respectively; the output terminal of counnter attack diode D1 and overvoltage protection pipe D12 is connected to the input end of surge pipe Q1 and the 24V output terminal of power supply processing module 6, and the output terminal of surge pipe Q1 is as the 5V output terminal of power supply processing module 6 and which is provided with logic supply voltage protection voltage-stabiliser tube D13.After vehicle power 4 enters power supply processing module 6, shunt and pressure regulation according to the difference in functionality module, give second input processing module 8, valve control output module 10 and power logic circuitry respectively.
Described first input processing module 7 comprises: three counnter attack diode D21; D23; D24; two divider resistance R21; R23; low-pass filter circuit R22; C21; two voltage protection diode D22; D25 and a scmitt trigger circuit Q21; wherein: the second counnter attack diode D21 and the 3rd counnter attack diode D23 lay respectively at the input end and the output terminal of first input processing module 7; the bleeder circuit that the first voltage protection diode D22 and the first divider resistance R21 and the second divider resistance R23 constitute is parallel to the two ends of the second counnter attack diode D21 and the second counnter attack diode D23 respectively; filter resistance R22 is connected with the input end of the second divider resistance R23 and the input end of the first scmitt trigger circuit Q21 respectively with output terminal with the input end of first low-pass filter circuit that filter capacitor C21 constitutes; the input end of the first scmitt trigger circuit Q21 is provided with the second voltage protection diode D25, is provided with the 4th counnter attack diode D24 between the output terminal of the grounding end of first low-pass filter circuit and the second divider resistance R23.Three counnter attack diode D21, D23, D24 are used for that power taking operating switch 1 power supply connects anti-protection and power taking operating switch 1 connects anti-protection simultaneously entirely with vehicle power 4 inputs; first low-pass filter circuit and scmitt trigger circuit are used for the stable level of exporting to logic processing module 9, and the output terminal of the first scmitt trigger circuit Q21 is connected with logic processing module 9 and exports the power taking signal.
Described second input processing module 8 comprises: three current limliting divider resistance R31, R32, R33, the second low-pass filter circuit R34, C31, the voltage-stabiliser tube D31 and the second scmitt trigger circuit Q31, wherein: the two ends of the first current limliting divider resistance R31 are connected with an end of neutral position switch and the output terminal of power supply processing module 6 respectively, the input end of second low-pass filter circuit that the two ends of the second current limliting divider resistance R32 are formed with the other end of neutral position switch and the second lower pass-filter resistance R 34 and the second lower pass-filter capacitor C 31 respectively is connected, the output terminal of second low-pass filter circuit is connected with the input end of the second scmitt trigger circuit Q31, be provided with the 3rd lower pass-filter resistance R 33 between the input end of the second lower pass-filter capacitor C 31 and the grounding end, the input end of the second scmitt trigger circuit Q31 is provided with voltage-stabiliser tube D31, and the output terminal of the second scmitt trigger circuit Q31 is connected with logic processing module 9 and exports the neutral signal.The first current limliting divider resistance R31 prevents that external neutral switch is combined to form dividing potential drop and uses for input signal to the short circuit of chassis bonding and with the second current limliting divider resistance R32, the 3rd lower pass-filter resistance R 33.
Described valve control output module 10 comprises: switch type field effect transistor Q51; two divider resistance R51 and R52; current sampling resistor R53; two voltage protection diode D52; D53; sustained diode 54; the 5th counnter attack diode D55; wherein: the 3rd divider resistance R51 and the 4th divider resistance R52 that connects with it are connected between the output terminal of the output terminal of power supply processing module 6 and logic processing module 9; the two ends of tertiary voltage protection diode D52 and the grid of switch type field effect transistor Q51 and the two ends that drain electrode is parallel to the 3rd divider resistance R51 respectively; the two ends of current sampling resistor R53 are connected with source electrode and the power taking solenoid valve 5 of switch type field effect transistor Q51 respectively; the two ends of the 4th voltage protection diode D53 are connected with the drain electrode of switch type field effect transistor Q51 and the positive pole of power taking solenoid valve 5 respectively; sustained diode 54 is connected in the positive and negative polarities of power taking solenoid valve 5; the end ground connection of the 5th counnter attack diode D55, the other end is connected with the negative pole of power taking solenoid valve 5.
The comparator C that comprises two cascades 1 and the C2 of described short-circuit protection module 11; wherein: the electric current of first comparator C, 1 collection valve control output draws the high low signal of electric current; second comparator C 2 is used to set current limit value; the resistance on comparator side is used to adjust the comparator operation point as the auxiliary element of comparator work.
As shown in Figure 2, said apparatus is realized control by following steps:
After powering on, system at first enters non-power taking state.Under the working state of non-power taking, when detect power taking operating switch 1 signal effectively after, system changes the power taking state over to.After entering the power taking state, at first control output power taking solenoid valve 5, monitor output current immediately, in case delivery valve control electric current surpasses setting value, the output of short-circuit protection module 11 cut-off valve controls makes valve control output invalid, and controller enters the short-circuit protection state.If be not short-circuited, situation such as excess current, whether logic analysis module monitoring power taking operating switch 1 closes, if do not close, continues to keep the power taking state; Whether if power taking operating switch 1 is closed, it is effective then to inquire about neutral switch.If neutral switch is invalid, justification function person does not make the gearbox shelves that make the return trip empty in accordance with regulations earlier, and the request that disconnects power taking is invalid, and logic module maintaining valve control output remains in the power taking state.If neutral switch is effective, to close the request of power take-off and can let pass, valve control output is closed, power taking solenoid valve 5 dead electricity, power take-off disconnects power taking, and system comes back to non-power taking state.After controller enters the short-circuit protection state, under the situation that the power taking instruction does not have to cancel (being that power taking operating switch 1 is opened), controller will remain on the short-circuit protection state always.Close when power taking request switch, controller withdraws from the short-circuit protection state, enters non-power taking state, for checking circuit and preparing power taking next time.
In conjunction with actual driver's operation for example:
Driving power take-off normally is operating as: the driver is stopped and is stepped on clutch, and extension neutral gear or needed the gear of power taking, opens power taking operating switch 1 then; The misoperation controller as long as under non-power taking state, obtains the power taking operation signal according to the control flow of Fig. 2, and misoperation suppresses controller 33 will think that this is a legal operation, so valve control output makes 5 energisings of power taking solenoid valve, power take-off power taking.
The normal power take-off that closes is operating as: the driver steps on clutch, hangs neutral gear, closes power take-off valve then.Misoperation suppresses the control flow of controller 3 according to Fig. 2, will check whether gearbox is in neutral position after obtaining closing the signal of power take-off.If at neutral position, satisfy the condition that power take-off is thrown off, so the output terminal outage makes the solenoid valve dead electricity, power take-off is thrown off, program circuit forwards non-power taking state to.
Misoperation: the driver steps on clutch under the power taking state; Close power taking operating switch 1 under the situation of maintenance power taking gear, misoperation suppresses the control flow of controller 3 according to Fig. 2, after obtaining closing the signal of power take-off, checks whether gearbox is in neutral position.Find that gearbox not at neutral gear, so continue to forward to the power taking state according to program circuit, does not disconnect power take-off, suppressed the misoperation of band shelves disengagement power take-off.
Misoperation release: when above-mentioned misoperation takes place, after finding, the driver in time gearbox is fallen back on neutral gear, close power taking operating switch 1, misoperation suppresses controller 3 just can be according to Fig. 2 control flow, be checked through be in neutral state after, permit to throw off power take-off, so 5 outages of power taking solenoid valve, program forwards non-power taking state to, and power take-off is thrown off.
When valve control output short-circuit took place: when short circuit took place, misoperation suppresses controller 3 just can change the short-circuit protection state over to according to Fig. 2 control flow, closes up to power taking operating switch 1, enters non-power taking state.Do not solve if short circuit, when opening power take-off,, will reenter the short-circuit protection state next time according to Fig. 2 control flow.And if short circuit solves, then when opening power take-off,, will enter the power taking state smoothly according to Fig. 2 control flow next time.
Claims (7)
1. misoperation suppression system of power takeoff, comprise: misoperation suppresses controller, power taking operating switch, main tank neutral switch, vehicle power and power taking solenoid valve, wherein: the output of power taking operating switch and main tank neutral switch is connected with the input operation instruction with the input end of misoperation inhibition controller respectively and judges the gearbox state, the output terminal that misoperation suppresses controller is connected with the power taking solenoid valve with the output control command, vehicle power connects the power end of power taking operating switch input end and misoperation inhibition controller respectively as the power supply source, it is characterized in that:
Described misoperation suppresses comprising of controller: power supply processing module; first input processing module; second input processing module; logic processing module; valve control output module and short-circuit protection module; wherein: the input end of power supply processing module is connected with vehicle power; the output terminal of power supply processing module is out-put supply to the second input processing module circuit respectively; logical circuit and valve control output circuit; the input end of first input processing module and second puocessing module links to each other with neutral position switch with the power taking operating switch respectively and exports power taking signal and neutral signal respectively to logic processing module; the input end of short-circuit protection module is connected with logic processing module with valve control output module respectively with output terminal and sample rate current is converted into short-circuit signal output; logic processing module is according to the power taking signal of receiving; neutral signal and short-circuit signal delivery valve control signal are to valve control output module; the output terminal of valve control output module is connected with the power taking solenoid valve and exports control command, is provided with current sampling resistor in the valve control output module and its sample rate current end is connected with the short-circuit protection module.
2. misoperation suppression system of power takeoff according to claim 1; it is characterized in that; the sample rate current of the input end receiving valve control output module of described short-circuit protection module exports comparative result to logic processing module as short-circuit signal after sample rate current and protective current are compared.
3. misoperation suppression system of power takeoff according to claim 1; it is characterized in that; described power supply processing module comprises: the first counnter attack diode; surge pipe; overvoltage protection pipe logic supply voltage protection voltage-stabiliser tube; wherein: the input end of the first counnter attack diode and overvoltage protection pipe is connected with vehicle power positive pole and vehicle power negative pole respectively; the output terminal of the first counnter attack diode and overvoltage protection pipe is connected to the input end of surge pipe and the 24V output terminal of power supply processing module, and the output terminal of surge pipe is as the 5V output terminal of power supply processing module and which is provided with logic supply voltage protection voltage-stabiliser tube.
4. misoperation suppression system of power takeoff according to claim 1; it is characterized in that; described first input processing module comprises: three counnter attack diodes; two divider resistances; first low-pass filter circuit; two the voltage protection diodes and first scmitt trigger circuit; wherein: the second counnter attack diode and the 3rd counnter attack diode lay respectively at the input end and the output terminal of first input processing module; the bleeder circuit that the first voltage protection diode and first divider resistance and second divider resistance constitute is parallel to the two ends of the second counnter attack diode and the second counnter attack diode respectively; the input end of first low-pass filter circuit is connected with the input end of second divider resistance and the input end of first scmitt trigger circuit respectively with output terminal; the input end of first scmitt trigger circuit is provided with the second voltage protection diode; be provided with the 4th counnter attack diode between the output terminal of the grounding end of first low-pass filter circuit and second divider resistance, the output terminal of first scmitt trigger circuit is connected with logic processing module and exports the power taking signal.
5. misoperation suppression system of power takeoff according to claim 1, it is characterized in that, described second input processing module comprises: three current limliting divider resistances, second low-pass filter circuit, the voltage-stabiliser tube and second scmitt trigger circuit, wherein: the two ends of the first current limliting divider resistance are connected with an end of neutral position switch and the output terminal of power supply processing module respectively, the two ends of the second current limliting divider resistance are connected with the other end of neutral position switch and the input end of second low-pass filter circuit respectively, the output terminal of second low-pass filter circuit is connected with the input end of second scmitt trigger circuit, be provided with the 3rd lower pass-filter resistance between the input end of the second lower pass-filter electric capacity and the grounding end, the input end of second scmitt trigger circuit is provided with voltage-stabiliser tube, and the output terminal of second scmitt trigger circuit is connected with logic processing module and exports the neutral signal.
6. misoperation suppression system of power takeoff according to claim 1; it is characterized in that; described valve control output module comprises: the switch type field effect transistor; two divider resistances; current sampling resistor; two voltage protection diodes; fly-wheel diode and the 5th counnter attack diode; wherein: the 3rd divider resistance and the 4th divider resistance of connecting with it are connected between the output terminal of the output terminal of power supply processing module and logic processing module; the two ends that the two ends of tertiary voltage protection diode and the grid of switch type field effect transistor and drain electrode are parallel to the 3rd divider resistance respectively; the two ends of current sampling resistor are connected with the source electrode and the power taking solenoid valve of switch type field effect transistor respectively; the two ends of the 4th voltage protection diode are connected with the drain electrode of switch type field effect transistor and the positive pole of power taking solenoid valve respectively; fly-wheel diode is connected in the positive and negative polarities of power taking solenoid valve; one end ground connection of the 5th counnter attack diode, the other end is connected with the negative pole of power taking solenoid valve.
7. misoperation suppression system of power takeoff according to claim 1 is characterized in that, the comparator that comprises two cascades of described short-circuit protection module.
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| CN103303178B (en) * | 2013-06-06 | 2015-06-10 | 东风汽车公司 | Single-H operated power takeoff electrical control system capable of carrying out traveling power take-off and use method of electrical control system |
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| CN101520089A (en) * | 2009-03-26 | 2009-09-02 | 上海汽车变速器有限公司 | Pneumatic shift operating system of secondary box of gearbox |
| CN201615200U (en) * | 2010-02-28 | 2010-10-27 | 赵国贵 | Transmission device |
| CN102230531A (en) * | 2011-04-08 | 2011-11-02 | 浙江万里扬变速器股份有限公司 | Electronic control system of dual-clutch automatic transmission |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103303178B (en) * | 2013-06-06 | 2015-06-10 | 东风汽车公司 | Single-H operated power takeoff electrical control system capable of carrying out traveling power take-off and use method of electrical control system |
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| CN101871532B (en) | 2013-04-10 |
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