CN108590867A

CN108590867A - One kind is stopped in emergency circuit and its implementation

Info

Publication number: CN108590867A
Application number: CN201711371519.0A
Authority: CN
Inventors: 田阿利; 陈悦; 谢仪; 邵长斌; 王长宝
Original assignee: Jiangsu University of Science and Technology
Current assignee: Jiangsu University of Science and Technology
Priority date: 2017-12-19
Filing date: 2017-12-19
Publication date: 2018-09-28

Abstract

It stops in emergency circuit and its implementation the invention discloses one kind, circuit is：There is deficient, over-current detection electric current relay the major loop that stops in emergency including string, stop in emergency back-up circuit, the switch failure fault control circuit of major loop overcurrent and its switch module, major loop undercurrent switching control circuit, the switch failure short-circuit detecting circuit of switch module in major loop, spare coil energization and breaking measure loop, and corresponding alarm circuit in advance in back-up circuit.Method is, during stopping in emergency, Fisrt fault indicator light is lit, and prompts the undercurrent of major loop under the non-dissengaged positions of user；When switch failure short circuit carries out physical break in major loop overcurrent and its circuit；It is whole before spare coil circuit enables that spare coil, whether open circuit detects prompt；It during stopping in emergency, is powered in advance to spare coil before back-up circuit is for use, when major loop breaks down and is switched to back-up circuit, so as to solenoid valve quick acting parking of stopping in emergency.

Description

One kind is stopped in emergency circuit and its implementation

Technical field

The invention belongs to diesel engine safety protection technique fields, and in particular to diesel engine stop in emergency Electromagnetic Valve Circuit failure Switching, warning circuit and its implementation.

Background technology

At present：The emergency stopping system of diesel engine dies and oil-break two ways to stopping in emergency for diesel engine, dies Mode is the installation Electromagnetic Control valve at inlet and outlet mouth, can in case of emergency control valve be died；Oil-break mode be Install oil-break Electromagnetic Control valving on oil circuit additional, it can urgent oil-break when failure occurs.These Electromagnetic Control valves are i.e. logical The often signified solenoid valve that stops in emergency.It is designed when the solenoid valve that the solenoid valve that stops in emergency uses is normal-closed electromagnetic valve The Electromagnetic Valve Circuit that stops in emergency stops for degaussing (dead electricity)；When the solenoid valve that the solenoid valve that stops in emergency uses is normal-open electromagnetic valve When the designed Electromagnetic Valve Circuit that stops in emergency be magnetic (energization) stops.Magnetic (energization) parking is stopped and obtains in degaussing (dead electricity) In two methods, what prior art Literature was recorded：Diesel engine died with degaussing or the solenoid valve of oil-break setting it is urgent There are many Electromagnetic Valve Circuit monitoring alarm method in vehicle-parking circuit, just do not sketch herein, only to the main problem of degaussing parking method It reiterates：It misses the bus and stops！When parking power loss and/or the Electromagnetic Valve Circuit that stops in emergency disconnect, diesel engine mistakenly stop vehicle influences bavin Oil machine normal operation.And diesel engine is returned with obtaining solenoid valve in the circuit that stops in emergency that magnetic is died or the solenoid valve of oil-break is arranged Road monitoring alarm method is seldom.Diesel engine is worked to obtain the circuit that stops in emergency that magnetic is died or the solenoid valve of oil-break is arranged Cheng Shi：The solenoid valve that stops in emergency when diesel engine works normally is in dead electricity (loss of excitation) state, that is, solenoid valve dead electricity of stopping in emergency When state its control die, oil-break valve is logical；When logical to the solenoid valve that stops in emergency in urgent and significant trouble Electricity (magnetic) closes the dying of its control, oil-break valve, realizes that diesel engine stops in emergency.However, for diesel engine with magnetic into In the circuit that stops in emergency that row is died or the solenoid valve of oil-break is arranged, when need to stop in emergency, solenoid valve normal power-up of stopping in emergency Diesel engine ability emergency stop, when line fracture, coil open circuit, coil short and power supply electricity occurs in the electromagnetic valve coil that stops in emergency When the failures such as road poor contact, need to stop in emergency, can not just be closed by the solenoid valve that stops in emergency its control die, oil cut-off valve Door, leads to failure of stopping in emergency, to make the safety of diesel engine that cannot ensure.Therefore for magnetic is died or oil-break The diesel engine of solenoid valve setting stops in emergency circuit, to ensure the execution of diesel engine (diesel-driven generator) safe shutdown, is badly in need of pair Whether the corresponding Electromagnetic Valve Circuit that stops in emergency, which fails, is detected and alarms.Although being documented, as number of patent application is： A kind of diesel engine of 201510846141.X stops in emergency Electromagnetic Valve Circuit failure alarm circuit and its alarm method, is equipped with spare The redundant configuration of power supply and solenoid valve (being similarly normal-open electromagnetic valve) solves：It is switched to stand-by power supply when parking power loss Power supply；Control recognizes Electromagnetic Valve Circuit disconnection of stopping in emergency when stopping in emergency, be switched to spare solenoid valve and be powered on, pass through The dying of spare solenoid valve closing control, oil-break access.Perfect setting is seemed actually to can not be achieved at all：Stop power supply Stand-by power supply power supply is switched to when dead electricity；The Electromagnetic Valve Circuit that stops in emergency when control is stopped in emergency disconnects, and is switched to standby electricity Magnet valve is powered on, and passes through the dying of spare solenoid valve closing control, oil-break access.About when stop power loss when can not possibly Being switched to the reasons why stand-by power supply is powered is：Because of the current relay line of specific control parking power supply and stand-by power supply switching Enclose (the second current relay coil) rated current be greater than or equal to parking power supply rated current, and with the current mode after The rated current that can not possibly be greater than or equal to parking power supply for the electric current that the first alarm lamp flows through with LED of electric apparatus coil concatenation, Otherwise will not with LED as alarm lamp；When stop power loss when, it is assumed that flow through and the current relay coil tandem It is that the electric current that the first alarm lamp flows through is greater than or equal to the rated current of parking power supply with LED, current relay completion stops Vehicle power supply and stand-by power supply switch operating so require the rated current of alarm power supply to be greater than or equal to parking power supply again Rated current, otherwise cannot normally complete switching parking power supply and stand-by power supply and switch；Again because with being the second alarm with LED The rated current for the current relay coil (third current relay coil) that lamp string connects, which also requires that be greater than or equal to, stops The rated current of vehicle power supply just necessarily requires the specified electricity of alarm power supply so in order to ensure alarm power supply normal work Two times of the rated current or more more than or equal to parking power supply is flowed, and the rated current for power supply of alarming actually in engineering design It is required that can not possibly be relevant with the parking rated current of power supply, the current requirements individually flowed through with the alarm lamp for power supply power supply of alarming Be also impossible to it is relevant with the parking rated current of power supply, and with the current relay coil requirement for power supply power supply of alarming Rated current be also impossible to parking the rated current of power supply it is relevant, equally each alarm lamp is unlikely required to flow through Electric current is greater than or equal to the rated current of the power supply for its power supply.About the Electromagnetic Valve Circuit that stops in emergency when control is stopped in emergency It disconnects, it is impossible to which being switched to the reasons why spare solenoid valve is powered on is：It is serially connected in the current mode for the Electromagnetic Valve Circuit that stops in emergency Relay (the first current relay) identifies the case where being disconnected less than the Electromagnetic Valve Circuit that stops in emergency at all, because being serially connected in tight Its is specified for current relay coil (the first current relay coil) of the emergency stop vehicle Electromagnetic Valve Circuit invention setting requirements Electric current is greater than or equal to the rated current of parking power supply, to identify less than emergency stop vehicle Electromagnetic Valve Circuit disconnection, tool at all Body the reason is that：1. the situation of the short circuit for the Electromagnetic Valve Circuit that stops in emergency can only be recognized, because stopping in emergency Electromagnetic Valve Circuit just When being often powered on, the normal current of set generation can not possibly be more than or equal to the rated current of parking power supply, if institute The electric current of generation is greater than or equal to the rated current of parking power supply, that Electromagnetic Valve Circuit that stops in emergency certainly occurs short-circuit existing As；2. when the current relay for being serially connected in the Electromagnetic Valve Circuit that stops in emergency does not recognize the volume more than or equal to parking power supply Constant current, the Electromagnetic Valve Circuit institute galvanization that can only illustrate to stop in emergency are in normal range (NR) or because poor contact resistance become high current It is equal to zero less than normal value or direct breaking current；3. because being serially connected in the current relay for the Electromagnetic Valve Circuit that stops in emergency only Can recognize the Electromagnetic Valve Circuit that stops in emergency short circuit situation, to occur stopping in emergency Electromagnetic Valve Circuit institute's galvanization no matter In normal, when being also less than normal (such as open circuit)：Assuming that the third current relay coil being serially connected on the second alarm lamp Institute's galvanization is greater than or equal to the rated current of parking power supply, then spare solenoid valve is similarly in work once electrified state；Actually The third current relay coil institute's galvanization being serially connected on the second alarm lamp can not possibly be more than or equal to the volume of parking power supply Constant current is also less than standby when normal (such as open circuit) so when no matter the Electromagnetic Valve Circuit institute's galvanization that stops in emergency is in normal It must not electricity with solenoid valve；4. because promptly stopping when the current relay for being serially connected in the Electromagnetic Valve Circuit that stops in emergency can only recognize The situation of the short circuit of vehicle Electromagnetic Valve Circuit, when the electric current for the Electromagnetic Valve Circuit that stops in emergency is greater than or equal to the specified electricity of parking power supply When stream, to stopping in emergency, Electromagnetic Valve Circuit is not cut off, and is in energized state in the same old way, and the spare electromagnetism that has been turned off that there is no problem Valve, therefore the Electromagnetic Valve Circuit short-circuit protection work that stops in emergency is not had, spare solenoid valve can not be switched to and stopped in emergency, when Can not so overload protective function be played to parking power supply.Further reaffirm：Because be serially connected in two current modes on alarm lamp after The rated current of electric apparatus coil is required to be greater than or equal to the rated current of parking power supply, and the rated current of hardly possible to alarm power supply is big In or equal to parking power supply two times of rated current or more！And each with LED as alarm lamp light when the electric current that flows through it is big In or equal to parking power supply rated current！Otherwise, the current relay being serially connected on alarm lamp is had no idea work.Certainly Also number of patent application is：201510845456.2 a kind of diesel-driven generator stop in emergency Electromagnetic Valve Circuit failure alarm circuit And its alarm method, it is equipped with the redundant configuration of stand-by power supply and solenoid valve (being similarly normal-open electromagnetic valve), is solved：Stop power supply Stand-by power supply power supply is switched to when dead electricity；Control recognizes Electromagnetic Valve Circuit disconnection of stopping in emergency when stopping in emergency, be switched to standby It is powered on solenoid valve, passes through the dying of spare solenoid valve closing control, oil-break access.Emitting seemingly realizes above-mentioned function, but It is in addition to there are number of patent application：201510846141.X a kind of diesel engine stop in emergency Electromagnetic Valve Circuit failure alarm circuit And its alarm method it is all there are the problem of and defect, be that electricity caused by diesel-driven generator is straight there is also power supply used in alarm lamp Power supply is connect, alarm lamp indicates to can't see at all after diesel-driven generator emergency stop vehicle, because when controlling diesel-driven generator emergency stop, user It alarm lamp can not possibly be stared at sees, it may be noted that once alarm lamp instruction state only after emergency stop, however diesel-driven generator emergency stop is not sent out How electricity, what is said or talked about have power supply output.And froming the perspective of from number of patent application 201510846141.X and number of patent application 201510845456.2 Advantageous effect content described in bright book is seen：Diesel engine (diesel generator) stops in emergency Electromagnetic Valve Circuit Failure Alarm electricity Road can carry out self-shield in time in device fails, to ensure its Electromagnetic Valve Circuit normal work of stopping in emergency, to Realize the automatic emergency stop-working protection of diesel engine (diesel generator) in abnormal cases.Further illustrate number of patent application The attached drawing of 201510846141.X and number of patent application 201510845456.2 is diesel engine main control module to diesel engine (diesel engine Generator) the Electromagnetic Valve Circuit failure alarm circuit that stops in emergency send out emergency shutdown instruction, control switch module switch connection after Diesel engine (diesel generator) stop in emergency Electromagnetic Valve Circuit failure alarm circuit structural schematic diagram, that is to say, that patent Shen Please the attached drawing of number 201510846141.X and number of patent application 201510845456.2 be diesel engine (bavin when stopping in emergency Diesel engine) stop in emergency Electromagnetic Valve Circuit failure alarm circuit structural schematic diagram, to which patent Shen furtherly be illustrated Please number 201510846141.X and the diesel engine (diesel generator) described in number of patent application 201510845456.2 use Stop in emergency solenoid valve be magnetic electromagnetic valve for braking.

It is well-known：In working process of diesel engine, as long as the Electromagnetic Valve Circuit that stops in emergency is normal, spare solenoid valve is constantly in The whether breaking user of coil of idle state, spare solenoid valve can not know.When stopping in emergency, if the solenoid valve that stops in emergency returns Road is abnormal (such as undercurrent), the spare Electromagnetic Valve Circuit being just switched to stops in emergency, but at this time if spare solenoid valve Coil is in open circuit, then the spare Electromagnetic Valve Circuit being switched to will be unable to stop in emergency by spare solenoid valve.

It is well-known simultaneously：Redundancy is carried out using two electromagnetic valve for braking, realization is reliably stopped in emergency, but installs inconvenience, and It is of high cost.

Invention content

The purpose of the present invention in order to solve defect of the existing technology, for magnetic is died or the electromagnetism of oil-break The diesel engine of valve setting stops in emergency, and provides one kind and stops in emergency circuit and its implementation, and the solenoid valve that stops in emergency uses The function of Double coil electromagnetic valve, realization has：Parking power-fail is switched to stand-by power supply power supply, ought promptly stop when stopping in emergency Vehicle solenoid valve main coil circuit undercurrent, overcurrent, switch failure short circuit are switched to spare coil circuit and stop in emergency, promptly stop Short-circuit protection is also carried out when vehicle solenoid valve main coil circuit overcurrent or switch failure short circuit, ensures circuit normal work of stopping in emergency And prevent mistakenly stop；Spare coil circuit is stood by during the non-emergent parking of diesel engine and during stopping in emergency When, to spare coil, whether open circuit is detected identification；During stopping in emergency in diesel engine, before spare coil enables to its into Row is pre- to be powered, to be cut when changing to spare coil work, and spare coil rapidly enters normal through-flow magnetic, that is, stop in emergency solenoid valve The valve of control is closed in action, is stopped in emergency；And indicator light is carried out to failure and is prompted respectively.

In order to achieve the above purpose, the technical solution of realization of the invention is：

One kind is stopped in emergency circuit, including parking power supply DC1, stand-by power supply DC2, alarm power supply DC3, first voltage type after Electric appliance, second voltage type relay, tertiary voltage type relay, the 4th voltage-type relay, the 5th voltage-type relay, first Current relay, the second current relay, the solenoid valve that stops in emergency, Fisrt fault indicator light MIL1, the second indicating fault Lamp MIL2, third malfunction indicator lamp MIL3, the 4th malfunction indicator lamp MIL4, the 5th malfunction indicator lamp MIL5, first switch module K1, second switch module K2, switching tube 100, switching tube 200, diode D1, diode D2, diode D3, diode D4, two Pole pipe D5, diode D6, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, photoelectrical coupler U；It is described tight Anxious electromagnetic valve for braking is that twin coil stops in emergency solenoid valve, that is, the coil for the solenoid valve that stops in emergency is by spare two groups of coil groups of advocating peace At；The first voltage type relay coil KV11 directly power supply DC1 and connects with parking, the anode and first of parking power supply DC1 The normally open end of voltage-type relay two-way contact KV12 is connected, and the anode and first voltage type relay of stand-by power supply DC2 is double It is connected to the normal-closed end of contact KV12, the cathode of stand-by power supply DC2 is connected with the cathode of parking power supply DC1；First electric current Type relay coil KI11 is sequentially connected in series the second current relay coil KI21, tertiary voltage type relay normally closed contact KV33, the solenoid valve main coil VC1 that stops in emergency, first switch module K1 switch after, the first current relay coil KI11 The other end be connected with the common end of first voltage type relay two-way contact KV12, the switch of first switch module K1 it is another One end is connected with the cathode of parking power supply DC1, and foregoing circuit constitutes first with parking power supply DC1 or stand-by power supply DC2 and stops Vehicle circuit, first parking circuit is the major loop that stops in emergency, that is, solenoid valve main coil circuit of stopping in emergency；It stops in emergency After solenoid valve spare coil VC2 is sequentially connected in series the switch of second voltage type relay normally open contact KV22, second switch module K2, The other end of solenoid valve spare coil VC2 of stopping in emergency is connected with the common end of first voltage type relay two-way contact KV12 It connects, the other end of the switch of second switch module K2 is connected with the cathode of parking power supply DC1, foregoing circuit and parking power supply DC1 or stand-by power supply DC2 constitutes Article 2 parking circuit, and Article 2 parking circuit is the back-up circuit that stops in emergency, i.e., tightly Anxious electromagnetic valve for braking spare coil circuit；Second current relay normally opened contact KI22 is touched with tertiary voltage type relay normally open After point KV32 and the 4th voltage-type relay normally open contact KV42 are connected with each other, one end concatenates tertiary voltage type relay coil The common end of first voltage type relay two-way contact KV12 is accessed after KV31, the other end accesses the cathode of parking power supply DC1, on It states circuit and constitutes Article 3 parking circuit with parking power supply DC1 or stand-by power supply DC2, Article 3 parking circuit is promptly to stop The switch failure fault control circuit of car owner circuit overcurrent and first switch module；First current relay normally-closed contact KI12 One end be connected with the common end of first voltage type relay two-way contact KV12, the other end concatenate second voltage type relay It is accessed on the connecting line that second voltage type relay normally open contact KV22 is switched with second switch module K2 after coil KV21, it is above-mentioned Circuit constitutes Article 4 parking circuit with parking power supply DC1 or stand-by power supply DC2, and Article 4 parking circuit is to stop in emergency Major loop undercurrent switching control circuit；One end of the 4th voltage-type relay coil KV41 is double with first voltage type relay It is connected to the common end of contact KV12, the other end is connected with the hot end of switching tube 100, the low potential of switching tube 100 On the connecting line for terminating the solenoid valve main coil VC1 and first switch module K1 switches that stop in emergency, one end of resistance R1 and the The common end of one voltage-type relay two-way contact KV12 is connected, the other end and the anode of diode D1 and the sun of diode D3 Extremely connected with each other, the cathode access second voltage type relay normally open contact KV22 and second switch module K2 of diode D3 is switched Connecting line on, the cathode of diode D1 is connected with the anode of diode D2, the control of the cathode and switching tube 100 of diode D2 End processed and one end of resistance R2 are connected with each other, the cathode of the other end access parking power supply DC1 of resistance R2, foregoing circuit and parking Power supply DC1 or stand-by power supply DC2 constitutes Article 5 and stops circuit, and Article 5 parking circuit is the in stopping in emergency major loop The switch failure short-circuit detecting circuit of one switch module；Resistance R3 one end access stop in emergency solenoid valve spare coil VC2 with On the connecting line of second voltage type relay normally open contact KV22, the other end of resistance R3 and the anode and diode of diode D4 The anode of D6 is connected with each other, cathode access second voltage type relay normally open contact KV22 and the second switch module of diode D4 On the connecting line of K2 switches, the cathode of diode D6 is connected with the anode of diode D5, cathode and the resistance R4 of diode D5 One end be connected, the other end of resistance R4 and one end of the control terminal of switching tube 200 and resistance R5 are connected with each other, resistance R5's The cathode of other end access parking power supply DC1, the cold end of switching tube 200 are connected with the cathode of parking power supply DC1, switch The hot end of pipe 200 concatenates access first voltage type relay two-way contact KV12 after the 5th voltage-type relay coil KV51 Common end, one end access of resistance R6 stops in emergency solenoid valve spare coil VC2 and second voltage type relay normally open contact On the connecting line of KV22, the other end of resistance R6 is connected with the anode of light emitting diode in photoelectrical coupler U, photoelectrical coupler The connection of the cathode access second voltage type relay normally open contact KV22 of light emitting diode and second switch module K2 switches in U On line, the collector of phototriode is connected with the hot end of switching tube 200 in photoelectrical coupler U, in photoelectrical coupler U The emitter of phototriode is connected with the cathode of parking power supply DC1, foregoing circuit and parking power supply DC1 or stand-by power supply DC2 constitutes Article 6 parking circuit, and the Article 6 parking circuit is standby for the solenoid valve that stops in emergency in the back-up circuit that stops in emergency It is powered in advance with coil and breaking measure loop；First voltage type relay normally closed contact KV13 concatenation third malfunction indicator lamp MIL3 It power supply DC3 and is connect with alarm afterwards, parking power-fail alarm circuit is constituted with alarm power supply DC3；Tertiary voltage type relay is double It is connected to the common end of contact KV34 with the anode of alarm power supply DC3, tertiary voltage type relay two-way contact KV34's is normal Beginning is connected after concatenating the second malfunction indicator lamp MIL2 with the cathode of alarm power supply DC3, promptly stops with alarm power supply DC3 compositions Car owner circuit overcurrent and first switch Module Fail alarm circuit；The normal-closed end string of tertiary voltage type relay two-way contact KV34 It is connected with the cathode of alarm power supply DC3 after meeting second voltage type relay normally open contact KV23, Fisrt fault indicator light MIL1, The major loop undercurrent alarm circuit that stops in emergency is constituted with alarm power supply DC3；4th voltage-type relay normally open contact KV43 concatenations It power supply DC3 and is connect with alarm after 4th malfunction indicator lamp MIL4, the switch failure of first switch module is constituted with alarm power supply DC3 Short-circuit alarming circuit；5th voltage-type relay normally open contact KV52 concatenate after the 5th malfunction indicator lamp MIL5 with alarm power supply DC3 simultaneously connects, and solenoid valve spare coil breaking alarming circuit of stopping in emergency is constituted with alarm power supply DC3；The first switch module It is connected with the output of diesel engine main control module after the control terminal of K1 and the control terminal of second switch module K2 are connected with each other；It is described Switching tube 100 is N-type metal-oxide-semiconductor or the switching tube 100 is NPN type triode；The switching tube 200 is N-type metal-oxide-semiconductor or institute It is NPN type triode to state switching tube 200.

The above-described solenoid valve that stops in emergency is that twin coil stops in emergency solenoid valve, that is, the coil for the solenoid valve that stops in emergency By advocating peace, spare two groups of coils form, and any of which group coil is powered in two groups of coils or two groups of coils are powered simultaneously, promptly stops Vehicle solenoid valve obtain magnetic action close its control die or the valve of oil-break, realize diesel engine stop in emergency；Two groups of coils are When power failure state, the solenoid valve that stops in emergency is in loss of excitation state, solenoid valve control of stopping in emergency die or the valve of oil-break at In unlatching；It stops in emergency and is set as the solenoid valve main coil VC1 that stops in emergency, another group of setting for one group in two groups of coils of solenoid valve For the solenoid valve spare coil VC2 that stops in emergency.

The rated current of above-described first current relay coil KI11 is set equal to solenoid valve master of stopping in emergency The extinction current of coil VC1；The rated current of the second current relay coil KI21 is set equal to stop in emergency The maximum allowed current of solenoid valve main coil VC1.

Above-described first voltage type relay two-way contact KV12, second voltage type relay normally open contact KV22, And the maximum currents that allow to flow through of tertiary voltage type relay normally closed contact KV33 are equal to or the volume more than parking power supply DC1 Constant current.

The above-described extinction current for stopping in emergency solenoid valve main coil VC1 refers to：Ensure the electromagnetism that stops in emergency Valve works normally and flows through the minimum current for the solenoid valve main coil VC1 that stops in emergency.

The above-described maximum allowed current for stopping in emergency solenoid valve main coil VC1 refers to：Ensure the electromagnetism that stops in emergency Valve works normally, and will not burn out the maximum operating currenbt for the solenoid valve main coil VC1 that stops in emergency.

When above-described switching tube 100 and switching tube 200 are N-type metal-oxide-semiconductor, the grid of N-type metal-oxide-semiconductor is switching tube 100 With the control terminal of switching tube 200, the drain electrode of N-type metal-oxide-semiconductor is the hot end of switching tube 100 and switching tube 200, N-type metal-oxide-semiconductor Source electrode is the cold end of switching tube 100 and switching tube 200；The switching tube 100 and switching tube 200 is NPN type triode When, the base stage of NPN type triode is the control terminal of switching tube 100 and switching tube 200, and the current collection of NPN type triode extremely switchs The hot end of pipe 100 and switching tube 200, the low potential of the transmitting extremely switching tube 100 and switching tube 200 of NPN type triode End.

Above-described diode D1, diode D2, diode D3, diode D4, diode D5 and diode D6 are Switching diode；The N-type metal-oxide-semiconductor is the enhanced metal-oxide-semiconductor of N-channel；The NPN type triode is three pole of NPN type switch Pipe.

In order to achieve the above purpose, another technical solution of the invention is：

A kind of implementation method for the circuit that stops in emergency, includes the following steps:

One, stop power supply DC1 and stand-by power supply DC2 handoff procedures

1) when stop power supply DC1 output be it is normal when, first voltage type relay coil KV11 obtain it is electric, first voltage type after The contact of electric appliance acts：

(1) the common end Yu normally open end of first voltage type relay two-way contact KV12 is connected, and power supply DC1 is to parking for parking Loop power supply,

(2) first voltage type relay normally closed contact KV13 is disconnected, and third malfunction indicator lamp MIL3 extinguishes；

2) when the power supply DC1 that stops fails, first voltage type relay coil KV11 dead electricity, first voltage type relay Contact reverts to static state：

(1) the common end of first voltage type relay two-way contact KV12 is connected with normal-closed end, is switched to stand-by power supply DC2 To parking loop power supply,

(2) first voltage type relay normally closed contact KV13 is connected, and third malfunction indicator lamp MIL3 is lighted, and user is prompted to stop The DC1 failures of vehicle power supply；

3) when in stand-by power supply DC2 to during parking loop power supply, when power supply DC1 outputs of stopping revert to normal, the One voltage-type relay coil KV11 obtains electric, the contact action of first voltage type relay：

First voltage type relay two-way contact KV12 common end Yu normally open end connect, restore parking power supply DC1 to Stop loop power supply,

(2) first voltage type relay normally closed contact KV13 is disconnected, and the third malfunction indicator lamp MIL3 lighted extinguishes；

Two, the process in control parking circuit

1) assert that second switch module K2 is intact, first switch module K1 quality is set as being unknown：

When diesel engine main control module sends out emergency shut-down control device signal to first switch module K1 and second switch module K2 Whether the switch of period, the switch connection of second switch module K2, first switch module K1 are connected to be unknown,

When diesel engine main control module does not send out emergency shut-down control device letter to first switch module K1 and second switch module K2 During number, the switch of second switch module K2 disconnects, and it is unknown whether the switch of first switch module K1 is broken as；

2) when the switch of second switch module K2 in an ON state, that is, stop in emergency during, then switching tube 100 end, Switching tube 200 ends：

(1) switching tube 100 ends, and the contact of the 4th voltage-type relay is in static state, is not produced to tertiary voltage type relay Raw control signal, and the 4th malfunction indicator lamp MIL4 is to extinguish,

(2) switching tube 200 ends, and the 5th voltage-type relay coil KV51 is led by the phototriode in photoelectrical coupler U It is logical to control whether to be powered with cut-off：

1. being disconnected when second voltage type relay normally open contact KV22 is in, that is, the back-up circuit that stops in emergency is in for use shape When state：

If a. lumination of light emitting diode makes the phototriode of its light that saturation be connected in photoelectrical coupler U：

The solenoid valve spare coil VC2 that illustrates to stop in emergency is in non-off state, and is constituted through resistance R3 and diode D4 Branch and resistance R6 and photoelectrical coupler U in light emitting diode constitute branch jointly to for use back-up circuit that stops in emergency In the solenoid valve spare coil VC2 that stops in emergency be powered in advance, pre- electrical current is in the minimum of solenoid valve spare coil VC2 of stopping in emergency It maintains 3/5ths of electric current between one third,

5th voltage-type relay coil KV51 is powered, and the contact of the 5th voltage-type relay is in dynamic, the 5th voltage Type relay normally open contact KV52 is connected, and the 5th malfunction indicator lamp MIL5 is lighted, and prompts user is for use to stop in emergency spare time The solenoid valve spare coil VC2 that stops in emergency in road is in non-off state,

If b. light emitting diode does not shine in photoelectrical coupler U, the phototriode of light ends：

The solenoid valve spare coil VC2 that illustrates to stop in emergency is in off state, in the solenoid valve spare coil VC2 that stops in emergency No current passes through,

The contact of 5th voltage-type relay coil KV51 no powers, the 5th voltage-type relay is in static state, the 5th electricity Die mould relay normally open contact KV52 is disconnected, and the 5th malfunction indicator lamp MIL5 extinguishes, prompt user it is for use stop in emergency it is spare The solenoid valve spare coil VC2 that stops in emergency in circuit is in off state,

2. being connected when waiting for that second voltage type relay normally open contact KV22 is in, the branch constituted to resistance R3 and diode D4 The branch that light emitting diode is constituted in road and resistance R6 and photoelectrical coupler U short circuit simultaneously, i.e., using the back-up circuit that stops in emergency Carry out emergency shut-down control device：

A. in photoelectrical coupler U light phototriode cut-off, not to stop in emergency solenoid valve spare coil VC2 whether Open circuit detection, the 5th voltage-type relay coil KV51 no powers, the 5th malfunction indicator lamp MIL5 extinguish,

If the solenoid valve spare coil VC2 that b. stops in emergency is in non-off state, stop in emergency solenoid valve spare coil VC2 Normal through-flow magnetic is rapidly entered, the valve of control is closed, stopped in emergency by solenoid valve quick acting of stopping in emergency, no Then, the solenoid valve spare coil VC2 no currents that stop in emergency pass through, and the solenoid valve that stops in emergency cannot close the valve of control, i.e., The solenoid valve that stops in emergency cannot be completed to stop in emergency,

C. wait for that the switch of second switch module K2 disconnects, i.e., when into during non-emergent parking, second voltage type relay Device normally opened contact KV22 is disconnected；

3) when the switch of second switch module K2 is off, i.e., during non-emergent parking, in photoelectrical coupler U by The phototriode of light ends, and the 5th voltage-type relay coil KV51 is controlled whether to lead to by the conducting of switching tube 200 with cut-off Electricity, and cut-off and the admittance of the switch on and off control switching tube 100 of first switch module K1：

(1) disconnected if the switch of first switch module K1 is in, switching tube 100 ends, and the 4th voltage-type relay touches Point does not generate control signal in static state to tertiary voltage type relay, and the 4th malfunction indicator lamp MIL4 is to extinguish,

(2) connected if the switch of first switch module K1 is in, the conducting saturation of switching tube 100, the 4th voltage-type relay Contact be in dynamic：

1. the 4th voltage-type relay normally open contact KV42 is connected, control signal is generated to tertiary voltage type relay, if Tertiary voltage type relay is in energization self-locking, then tertiary voltage type relay remains powered on self-locking, otherwise, triggers tertiary voltage Type relay power and self-locking,

2. the 4th voltage-type relay normally open contact KV43 is connected, the 4th malfunction indicator lamp MIL4 is lighted, user is prompted to exist The switch failure short circuit of first switch module K1 during non-emergent parking,

(3) the control of switching tube 200 whether being powered to the 5th voltage-type relay coil KV51：

1. if the conducting saturation of switching tube 200, the 5th voltage-type relay coil KV51 are powered, the 5th voltage-type relay Contact be in dynamic, the 5th voltage-type relay normally open contact KV52 in an ON state, the 5th malfunction indicator lamp MIL5 points Bright, the solenoid valve spare coil VC2 that illustrates to stop in emergency during non-emergent parking is in non-off state,

2. if switching tube 200 ends, the 5th voltage-type relay coil KV51 no powers, the 5th voltage-type relay Contact is in static state, and the 5th voltage-type relay normally open contact KV52 is off, and the 5th malfunction indicator lamp MIL5 extinguishes, The solenoid valve spare coil VC2 that stops in emergency during the prompt non-emergent parking of user is in off state；

4) when the switch of second switch module K2 in an ON state, that is, stop in emergency during：

If (1) recognize stop in emergency solenoid valve main coil VC1 by electric current be more than its maximum allowed current when, second The contact of current relay is in dynamic, i.e. the second current relay normally opened contact KI22 is connected, to tertiary voltage type after Electric appliance generates control signal, if tertiary voltage type relay is in energization self-locking, tertiary voltage type relay remains powered on certainly Lock, otherwise, triggering tertiary voltage type relay power and self-locking,

If (2) recognize stop in emergency solenoid valve main coil VC1 by electric current be less than or equal to maximum allowed current when, the The contact of two current relay is in static state, i.e. the second current relay normally opened contact KI22 is disconnected, not to tertiary voltage Type relay generates control signal；

5) it is powered when tertiary voltage type relay is in, i.e., the contact of tertiary voltage type relay is in dynamic：

(1) the tertiary voltage type relay normally closed contact KV33 being serially connected in stopping in emergency major loop is disconnected, to stopping in emergency Major loop carries out physical break protection,

(2) the common end Yu normally open end of tertiary voltage type relay two-way contact KV34 is connected, and lights the second malfunction indicator lamp MIL2 prompts user to stop in emergency the switch failure short circuit of major loop overcurrent or/and first switch module：

1. when the second malfunction indicator lamp MIL2 is lit during diesel engine stops in emergency by extinguishing, illustrate master of stopping in emergency Circuit overcurrent,

2. when the second malfunction indicator lamp MIL2 is lit during the non-emergent parking of diesel engine by extinguishing, illustrate first switch The switch failure short circuit of module K1,

3. stopping in emergency with during non-emergent parking when in diesel engine, the 4th malfunction indicator lamp MIL4 is always maintained at extinguishing shape State, then, the second malfunction indicator lamp MIL2 lighted illustrate major loop overcurrent of stopping in emergency,

4. after the second malfunction indicator lamp MIL2 is lighted during diesel engine stops in emergency by extinguishing, the 4th malfunction indicator lamp MIL4 can be lit during non-emergent parking, then follow-up in the second malfunction indicator lamp MIL2 lighted, explanation is stopped in emergency The short circuit of the switch failure of major loop overcurrent and first switch module K1,

5. after the second malfunction indicator lamp MIL2 is lighted during the non-emergent parking of diesel engine by extinguishing, then point is subsequently in The second bright malfunction indicator lamp MIL2 illustrates the switch failure short circuit of first switch module K1；

6) when the switch of second switch module K2 in an ON state, that is, stop in emergency during, solenoid valve to be stopped in emergency Main coil VC1 by electric current be less than its extinction current when, the contact of the first current relay is in static state, the first electricity Flow pattern relay normally closed contact KI12 is connected, and second voltage type relay coil KV21 obtains electric, and second voltage type relay touches Point enter dynamic, using stop in emergency back-up circuit control stop in emergency, and if tertiary voltage type relay contact be in it is quiet State then lights Fisrt fault indicator light MIL1, and user is prompted not carry out the undercurrent of the major loop that stops in emergency of physical break protection, Otherwise, Fisrt fault indicator light MIL1 extinguishes；

7) when flow through the solenoid valve main coil VC1 that stops in emergency electric current be less than or equal to its maximum allowed current, be more than or equal to When its extinction current, the major loop that stops in emergency control diesel engine stops in emergency；

8) it after tertiary voltage type relay power self-locking, waits removing parking power supply DC1 and stand-by power supply DC2, third electricity The contact of die mould relay is static state by Dynamic- Recovery.

The above-described extinction current for stopping in emergency solenoid valve spare coil VC2 refers to：Ensure the electricity that stops in emergency Magnet valve works normally and flows through the minimum current for the solenoid valve spare coil VC2 that stops in emergency.

Advantageous effect：

A kind of diesel engine of the present invention stops in emergency circuit and its implementation, main feature：

(1) during the entire process of during diesel engine stops in emergency and during non-emergent parking, once parking power-fail, It is switched to stand-by power supply work, and lights third malfunction indicator lamp MIL3, prompts user's parking power-fail；Power supply to be stopped is extensive It is multiple normal, automatically return to parking power supply power supply.

(2) during diesel engine stops in emergency, if lighting Fisrt fault indicator light MIL1, prompt user not carry out physics and cut The undercurrent of the major loop that stops in emergency of disconnected protection, that is, tertiary voltage type relay normally closed contact during prompting user to stop in emergency KV33 is in connect in the case of stop in emergency the undercurrent of major loop.

(3) during stopping in emergency in diesel engine, if detecting major loop overcurrent of stopping in emergency, physical break stops in emergency master Circuit, to stopping in emergency, major loop carries out short-circuit protection, lights the second malfunction indicator lamp MIL2, prompts user to stop in emergency and leads back Stream is passed by, and is promptly stopped to the back-up circuit that stops in emergency by means of the major loop undercurrent switching control loop switch that stops in emergency Vehicle.

(4) stop in emergency during the non-emergent parking of diesel engine switch failure short circuit in major loop, light the 4th indicating fault Lamp MIL4 prompts user to stop in emergency switch failure short circuit in major loop, if the major loop that stops in emergency is not in physical break guarantor Shield state then carries out physical break to the major loop that stops in emergency and protects, and prevents mistakenly stop vehicle.

(5) it is in overcurrent or/and switch failure short-circuit protection before diesel engine stops in emergency, carries out diesel engine and stops in emergency When, it is switched to the back-up circuit that stops in emergency and stops in emergency.

(6) the back-up circuit that stops in emergency during the non-emergent parking of diesel engine and during stopping in emergency is stood by When, it is lighted if the 5th malfunction indicator lamp MIL5 is always maintained at, the solenoid valve spare coil VC2 that illustrates to stop in emergency is in non-breaking shape Otherwise state prompts the user solenoid valve spare coil VC2 that stops in emergency to be in off state.

(7) during diesel engine stops in emergency, stop in emergency electromagnetism in back-up circuit enabling of stopping in emergency is preceding to its circuit Valve spare coil VC2 is powered in advance, wait the major loop that stops in emergency break down be switched to stop in emergency back-up circuit work when, So that the solenoid valve spare coil VC2 that stops in emergency rapidly enters normal through-flow magnetic, making to stop in emergency solenoid valve quick acting will The valve of control is closed, and is stopped in emergency.

Description of the drawings

Fig. 1 is that one kind of the present invention is stopped in emergency schematic block circuit diagram；

In figure：KV11. first voltage type relay coil, KV12. first voltage type relay two-way contacts, KV13. One voltage-type relay normally closed contact, KV21. second voltage type relay coils, KV22, KV23. second voltage type relay are normal Open contact, KV31. tertiary voltage type relay coils, KV32. tertiary voltage type relay normally open contacts, KV33. tertiary voltages Type relay normally closed contact, KV34. tertiary voltage type relay two-way contacts, the 4th voltage-type relay coils of KV41., The 4th voltage-type relay normally open contact of KV42, KV43., the 5th voltage-type relay coils of KV51., the 5th voltage-types of KV52. Relay normally open contact, KI11. the first current relay coils, KI12. the first current relay normally-closed contacts, KI21. Second current relay coil, KI22. the second current relay normally opened contacts, 100. switching tubes, 200. switching tubes, D1, D2, D3, D4, D5, D6. diode, R1, R2, R3, R4, R5, R6. resistance, U. photoelectrical couplers, DC1. parking power supplys, DC2. are standby With power supply, DC3. alarms power supply, and VC1. stops in emergency solenoid valve main coil, and VC2. stops in emergency solenoid valve spare coil, MIL1. Fisrt fault indicator light, the second malfunction indicator lamp of MIL2., MIL3. third malfunction indicator lamp, the 4th malfunction indicator lamp of MIL4., MIL5. the 5th malfunction indicator lamp, K1. first switch modules, K2. second switch modules.

Specific implementation mode

The circuit as shown in Figure 1, one kind is stopped in emergency, including parking power supply DC1, stand-by power supply DC2, alarm power supply DC3, the One voltage-type relay, second voltage type relay, tertiary voltage type relay, the 4th voltage-type relay, the 5th voltage-type Relay, the first current relay, the second current relay, the solenoid valve that stops in emergency, Fisrt fault indicator light MIL1, Two malfunction indicator lamp MIL2, third malfunction indicator lamp MIL3, the 4th malfunction indicator lamp MIL4, the 5th malfunction indicator lamp MIL5, One switch module K1, second switch module K2, switching tube 100, switching tube 200, diode D1, diode D2, diode D3, two Pole pipe D4, diode D5, diode D6, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, photoelectrical coupler U；The solenoid valve that stops in emergency is that twin coil stops in emergency solenoid valve, that is, the coil of the solenoid valve that stops in emergency is by advocating peace spare two Group coil composition；The first voltage type relay coil KV11 directly power supply DC1 and connects with parking, and parking power supply DC1 is just Pole is connected with the normally open end of first voltage type relay two-way contact KV12, anode and the first voltage type of stand-by power supply DC2 The normal-closed end of relay two-way contact KV12 is connected, and the cathode of stand-by power supply DC2 is connected with the cathode of parking power supply DC1； It is normally closed that first current relay coil KI11 is sequentially connected in series the second current relay coil KI21, tertiary voltage type relay Contact KV33, the solenoid valve main coil VC1 that stops in emergency, first switch module K1 switch after, the first current relay coil The other end of KI11 is connected with the common end of first voltage type relay two-way contact KV12, the switch of first switch module K1 The other end be connected with the cathode of parking power supply DC1, foregoing circuit constitutes first with parking power supply DC1 or stand-by power supply DC2 Item parking circuit, first parking circuit is the major loop that stops in emergency, that is, solenoid valve main coil circuit of stopping in emergency；Promptly Electromagnetic valve for braking spare coil VC2 is sequentially connected in series second voltage type relay normally open contact KV22, second switch module K2 is opened The common end of the other end and first voltage type relay two-way contact KV12 of Guan Hou, the solenoid valve spare coil VC2 that stops in emergency It is connected, the other end of the switch of second switch module K2 is connected with the cathode of parking power supply DC1, foregoing circuit and parking electricity Source DC1 or stand-by power supply DC2 constitutes Article 2 parking circuit, and Article 2 parking circuit is the back-up circuit that stops in emergency, i.e., It stops in emergency solenoid valve spare coil circuit；Second current relay normally opened contact KI22 and tertiary voltage type relay normally open After contact KV32 and the 4th voltage-type relay normally open contact KV42 are connected with each other, one end concatenates tertiary voltage type relay coil The common end of first voltage type relay two-way contact KV12 is accessed after KV31, the other end accesses the cathode of parking power supply DC1, on It states circuit and constitutes Article 3 parking circuit with parking power supply DC1 or stand-by power supply DC2, Article 3 parking circuit is promptly to stop The switch failure fault control circuit of car owner circuit overcurrent and first switch module；First current relay normally-closed contact KI12 One end be connected with the common end of first voltage type relay two-way contact KV12, the other end concatenate second voltage type relay It is accessed on the connecting line that second voltage type relay normally open contact KV22 is switched with second switch module K2 after coil KV21, it is above-mentioned Circuit constitutes Article 4 parking circuit with parking power supply DC1 or stand-by power supply DC2, and Article 4 parking circuit is to stop in emergency Major loop undercurrent switching control circuit；One end of the 4th voltage-type relay coil KV41 is double with first voltage type relay It is connected to the common end of contact KV12, the other end is connected with the hot end of switching tube 100, the low potential of switching tube 100 On the connecting line for terminating the solenoid valve main coil VC1 and first switch module K1 switches that stop in emergency, one end of resistance R1 and the The common end of one voltage-type relay two-way contact KV12 is connected, the other end and the anode of diode D1 and the sun of diode D3 Extremely connected with each other, the cathode access second voltage type relay normally open contact KV22 and second switch module K2 of diode D3 is switched Connecting line on, the cathode of diode D1 is connected with the anode of diode D2, the control of the cathode and switching tube 100 of diode D2 End processed and one end of resistance R2 are connected with each other, the cathode of the other end access parking power supply DC1 of resistance R2, foregoing circuit and parking Power supply DC1 or stand-by power supply DC2 constitutes Article 5 and stops circuit, and Article 5 parking circuit is the in stopping in emergency major loop The switch failure short-circuit detecting circuit of one switch module；Resistance R3 one end access stop in emergency solenoid valve spare coil VC2 with On the connecting line of second voltage type relay normally open contact KV22, the other end of resistance R3 and the anode and diode of diode D4 The anode of D6 is connected with each other, cathode access second voltage type relay normally open contact KV22 and the second switch module of diode D4 On the connecting line of K2 switches, the cathode of diode D6 is connected with the anode of diode D5, cathode and the resistance R4 of diode D5 One end be connected, the other end of resistance R4 and one end of the control terminal of switching tube 200 and resistance R5 are connected with each other, resistance R5's The cathode of other end access parking power supply DC1, the cold end of switching tube 200 are connected with the cathode of parking power supply DC1, switch The hot end of pipe 200 concatenates access first voltage type relay two-way contact KV12 after the 5th voltage-type relay coil KV51 Common end, one end access of resistance R6 stops in emergency solenoid valve spare coil VC2 and second voltage type relay normally open contact On the connecting line of KV22, the other end of resistance R6 is connected with the anode of light emitting diode in photoelectrical coupler U, photoelectrical coupler The connection of the cathode access second voltage type relay normally open contact KV22 of light emitting diode and second switch module K2 switches in U On line, the collector of phototriode is connected with the hot end of switching tube 200 in photoelectrical coupler U, in photoelectrical coupler U The emitter of phototriode is connected with the cathode of parking power supply DC1, foregoing circuit and parking power supply DC1 or stand-by power supply DC2 constitutes Article 6 parking circuit, and the Article 6 parking circuit is standby for the solenoid valve that stops in emergency in the back-up circuit that stops in emergency It is powered in advance with coil and breaking measure loop；First voltage type relay normally closed contact KV13 concatenation third malfunction indicator lamp MIL3 It power supply DC3 and is connect with alarm afterwards, parking power-fail alarm circuit is constituted with alarm power supply DC3；Tertiary voltage type relay is double It is connected to the common end of contact KV34 with the anode of alarm power supply DC3, tertiary voltage type relay two-way contact KV34's is normal Beginning is connected after concatenating the second malfunction indicator lamp MIL2 with the cathode of alarm power supply DC3, promptly stops with alarm power supply DC3 compositions Car owner circuit overcurrent and first switch Module Fail alarm circuit；The normal-closed end string of tertiary voltage type relay two-way contact KV34 It is connected with the cathode of alarm power supply DC3 after meeting second voltage type relay normally open contact KV23, Fisrt fault indicator light MIL1, The major loop undercurrent alarm circuit that stops in emergency is constituted with alarm power supply DC3；4th voltage-type relay normally open contact KV43 concatenations It power supply DC3 and is connect with alarm after 4th malfunction indicator lamp MIL4, the switch failure of first switch module is constituted with alarm power supply DC3 Short-circuit alarming circuit；5th voltage-type relay normally open contact KV52 concatenate after the 5th malfunction indicator lamp MIL5 with alarm power supply DC3 simultaneously connects, and solenoid valve spare coil breaking alarming circuit of stopping in emergency is constituted with alarm power supply DC3；The first switch module It is connected with the output of diesel engine main control module after the control terminal of K1 and the control terminal of second switch module K2 are connected with each other.

The above-described solenoid valve that stops in emergency is that twin coil stops in emergency solenoid valve, that is, the coil for the solenoid valve that stops in emergency By advocating peace, spare two groups of coils form, as long as any group of coil is powered in two groups of coils or two groups of coils are powered simultaneously, promptly stop Vehicle solenoid valve obtain magnetic action close its control die or the valve of oil-break, realize diesel engine stop in emergency；Two groups of coils are When power failure state, the solenoid valve that stops in emergency is in loss of excitation state, solenoid valve control of stopping in emergency die or the valve of oil-break at In unlatching.The present invention sets in two groups of coils of the solenoid valve that stops in emergency one group as the solenoid valve main coil VC1 of stopping in emergency, another Group is then the solenoid valve spare coil VC2 that stops in emergency.

Above-described first switch module K1 and second switch module K2 are when for serviceable condition：Receiving diesel engine What main control module was sent out stop in emergency (machine) control signal, the switch connection accordingly controlled, the i.e. switch of first switch module K1 It connects, the switch connection of second switch module K2；It is controlled not receiving stop in emergency (machine) that diesel engine main control module is sent out Signal, the switch accordingly controlled are off, i.e. the switch of first switch module K1 is off, second switch mould The switch of block K2 is off.

The above controls signal receiving stop in emergency (machine) that diesel engine main control module sends out, that is to say, that this hair The bright circuit that stops in emergency controls signal receiving stop in emergency (machine) that diesel engine main control module is sent out, stops in emergency at this time Circuit is operated in control diesel engine and stops in emergency.

The above controls signal not receiving stop in emergency (machine) that diesel engine main control module sends out, that is to say, that this The circuit that stops in emergency of invention controls signal not receiving stop in emergency (machine) that diesel engine main control module sends out, at this time promptly Vehicle-parking circuit is operated in non-controlling diesel engine and stops in emergency.

But in actual operation：Due to stopping in emergency, solenoid valve spare coil VC2 frequency of use is not high, so second switch The switch of module K2 is less likely to be damaged；But the opposite solenoid valve spare coil VC2 that stop in emergency of the solenoid valve main coil VC1 that stops in emergency For：Frequency of use is high, be easy to if leading to its coil short after being used for multiple times as the solenoid valve main coil VC1 that stops in emergency by First switch module K1 switch burns short circuit, then stop in emergency during non-controlling diesel engine stops in emergency Electromagnetic Valve Circuit there is also During overcurrent or non-emergent parking, due to first switch module K1 switch failure short circuits, cause accidentally to stop in emergency.Therefore this hair Second switch module K2 described in bright middle identification is serviceable condition, and first switch module K1 is unknown state.

In working process of diesel engine, as long as since the major loop that stops in emergency is normal, back-up circuit is stopped in emergency always In idle state, that is, the solenoid valve spare coil VC2 that stops in emergency just is constantly in idle state, and tight in this idle state The whether breaking users of anxious electromagnetic valve for braking spare coil VC2 can not know.When stopping in emergency, detection recognizes master of stopping in emergency Circuit overcurrent or undercurrent are switched to the back-up circuit that stops in emergency and stop in emergency, if stopping in emergency solenoid valve siding at this time It encloses VC2 and is in open circuit, then the diesel engine circuit that stops in emergency will be unable to make the solenoid valve that stops in emergency by the back-up circuit that stops in emergency Spare coil VC2 be powered magnetic stops in emergency.

Above-described diode D1, D2 and D3 are switching diode, and diode D1 and D2 select transwitch diode, Diode D3 selects transwitch diode or germanium switching diode.

Above-described switching tube 100 is N-type metal-oxide-semiconductor or NPN type triode, and the N-type metal-oxide-semiconductor used increases for N-channel Strong type metal-oxide-semiconductor, the NPN type triode used is NPN type switching transistor；When switching tube 100 is N-type metal-oxide-semiconductor, N-type metal-oxide-semiconductor Grid (G) be switching tube 100 control terminal, the drain electrode (D) of N-type metal-oxide-semiconductor is the hot end of switching tube 100, N-type metal-oxide-semiconductor Source electrode (S) be switching tube 100 cold end, and the switch of second switch module K2 be in disconnect, first switch module When the switch of K1 is in connection (short circuit), gate-source voltage is adjusted by resistance R1 and resistance R2, keeps the conducting of switching tube 100 full With；When switching tube 100 is NPN type triode, the base stage of NPN type triode is the control terminal of switching tube 100, three pole of NPN type The hot end of the current collection of pipe extremely switching tube 100, the cold end of the transmitting extremely switching tube 100 of NPN type triode, and The switch of second switch module K2, which is in, to be disconnected, and when the switch of first switch module K1 is in connection (short circuit), passes through resistance R1 Base current is adjusted with resistance R2, makes the conducting saturation of switching tube 100.When the switch connection of second switch module K2, i.e. diode When D3 is connected, the cathode potential of diode D3 anodes to parking power supply DC1 are clamped at the following level of 0.7V or so, to anode The current potential of the diode D1 to connect with diode D3 anodes, anode to parking power supply DC1 cathode are arrived equal to diode D3 anodes The current potential of the current potential that parking power supply DC1 cathode are clamped, i.e. diode D1 anodes to parking power supply DC1 cathode is clamped at 0.7V The following level in left and right, therefore positive diode D1 and diode D2 cut-offs, no conductivity control signal along string is sent to switching tube 100 Control terminal, at this time whether the switch connection of first switch module K1, switching tube 100 is turned off.When opening for first switch module K1 Close in disconnect when, switching tube 100 use N-type metal-oxide-semiconductor, no matter second switch module K2 switch connection whether, N-type metal-oxide-semiconductor Equal no-voltage between grid source, the cut-off of N-type metal-oxide-semiconductor；When the switch of first switch module K1, which is in, to be disconnected, switching tube 100 uses NPN Type triode, no matter second switch module K2 switch connection whether, the equal no current of base stage of NPN type triode, three pole of NPN type Pipe ends.

For switching tube 100 is NPN type triode：It is disconnected when the switch of second switch module K2 is in, i.e. two poles When pipe D3 is in cut-off, if the switch of first switch module K1, which is in, connects (short circuit), stop power supply DC1 or stand-by power supply DC2 is diverted to NPN type triode base current through resistance R1, diode D1, diode D2, and it is full to meet NPN type triode conducting With require, NPN type triode conducting saturation, otherwise, parking power supply DC1 or stand-by power supply DC2 through resistance R1, diode D1, two It is zero that pole pipe D2, which is diverted to NPN type triode base current, NPN type triode cut-off；When the switch of second switch module K2 connects Logical, i.e. when diode D3 is connected, the current potential of diode D3 anodes to parking power supply DC1 are clamped at the following level of 0.7V or so, To the diode D1 that anode connects with diode D3 anodes, the current potential of anode to parking power supply DC1 cathode is equal to diode The current potential of the current potential that D3 anodes are clamped to parking power supply DC1, i.e. diode D1 anodes to parking power supply DC1 cathode is clamped at The following level of 0.7V or so, therefore positive diode D1 and diode D2 along string is obstructed, no current send the base of NPN type triode Pole, at this time no matter first switch module K1 switch connection whether, NPN type triode is turned off.

For switching tube 100 is N-type metal-oxide-semiconductor：It is disconnected when the switch of second switch module K2 is in, i.e. diode D3 When in cut-off, if the switch of first switch module K1, which is in, connects (short circuit), stop power supply DC1 or stand-by power supply DC2 warps Resistance R1, diode D1, diode D2, resistance R2 are divided to the gate-source voltage of N-type metal-oxide-semiconductor, and it is full to meet the conducting of N-type metal-oxide-semiconductor With require, N-type metal-oxide-semiconductor conducting saturation, otherwise, parking power supply DC1 or stand-by power supply DC2 through resistance R1, diode D1, diode The gate-source voltage that D2, resistance R2 are divided to N-type metal-oxide-semiconductor is zero, the cut-off of N-type metal-oxide-semiconductor；When the switch of second switch module K2 connects Logical, i.e. when diode D3 is connected, the current potential of diode D3 anodes to parking power supply DC1 are clamped at the following level of 0.7V or so, To the diode D1 that anode connects with diode D3 anodes, the current potential of anode to parking power supply DC1 cathode is equal to diode The current potential of the current potential that D3 anodes are clamped to parking power supply DC1, i.e. diode D1 anodes to parking power supply DC1 cathode is clamped at The following level of 0.7V or so, therefore positive diode D1 and diode D2 along string is obstructed, no-voltage adds to the grid of N-type metal-oxide-semiconductor, At this time no matter first switch module K1 switch connection whether, N-type metal-oxide-semiconductor is turned off.

When switching tube 100 be in cut-off, then the 4th voltage-type relay coil KV41 no currents pass through, the 4th voltage-type after Electric appliance does not work, and the contact of the 4th voltage-type relay is in static state.

When switching tube 100 is on saturation, then the 4th voltage-type relay coil KV41 has electric current to pass through, the 4th voltage Type relay works, and the contact of the 4th voltage-type relay is in dynamic.

When assert that second switch module K2 is serviceable condition, in second switch module K2 in during switch disconnection：It opens It closes pipe 100 to end, i.e., the contact of the 4th voltage-type relay is in static state, then illustrates that the switch of first switch module K1 is equally located It is intact in being broken as；The conducting saturation of switching tube 100, the i.e. contact of the 4th voltage-type relay are in dynamic, then assert that first opens The switch for closing module K1 is in connection (short circuit) as damage.

When assert second switch module K2 be serviceable condition, during the switch connection of second switch module K2：No matter Whether the switch of one switch module K1 is connected, and switching tube 100 is turned off, and the contact of the 4th voltage-type relay is in static state, I.e. during the switch connection of second switch module K2, then switch failure short-circuit detecting circuit does not open first switch module K1 Whether pass damages detection identification.

Above-described diode D4, D5 and D6 are switching diode, and diode D5 and D6 select two pole of transwitch Pipe, diode D4 select transwitch diode or germanium switching diode.

Above-described switching tube 200 is N-type metal-oxide-semiconductor or NPN type triode, and the N-type metal-oxide-semiconductor used increases for N-channel Strong type metal-oxide-semiconductor, the NPN type triode used is NPN type switching transistor；When switching tube 200 is N-type metal-oxide-semiconductor, N-type metal-oxide-semiconductor Grid (G) be switching tube 200 control terminal, the drain electrode (D) of N-type metal-oxide-semiconductor is the hot end of switching tube 200, N-type metal-oxide-semiconductor Source electrode (S) be switching tube 200 cold end；When switching tube 200 is NPN type triode, the base stage of NPN type triode is The control terminal of switching tube 200, the hot end of the current collection extremely switching tube 200 of NPN type triode, the transmitting of NPN type triode The extremely cold end of switching tube 200.It is connected when the switch of second switch module K2 is in：(1) if second voltage type relay is normal It opens contact KV22 and is in disconnection, when the solenoid valve spare coil VC2 that stops in emergency is in non-off state, diode D4 conductings, two The cathode potential of pole pipe D4 anodes to parking power supply DC1 are clamped at the following level of 0.7V or so, to anode and diode D4 The current potential of the diode D6 that anode connects, anode to parking power supply DC1 cathode are equal to diode D4 anodes to parking power supply DC1 The current potential of the current potential that cathode is clamped, i.e. diode D6 anodes to parking power supply DC1 cathode is clamped at the following electricity of 0.7V or so It is flat, therefore positive diode D6 and diode D5 cut-offs, no conductivity control signal along string send to the control terminal of switching tube 200, opens Pipe 200 is closed to end；(2) if second voltage type relay normally open contact KV22 is in connection, no matter the solenoid valve that stops in emergency is spare Which kind of state coil VC2 is in, and the current potential of diode D6 anodes to parking power supply DC1 cathode is by the switch of second switch module K2 Clamper is sent in 0V or so, therefore positive diode D6 and diode D5 cut-offs, no conductivity control signal along string to switching tube 200 Control terminal, switching tube 200 end；(3) disconnected if second voltage type relay normally open contact KV22 is in, stop in emergency solenoid valve When spare coil VC2 is in off state, parking power supply DC1 and stand-by power supply DC2 can not be spare by the solenoid valve that stops in emergency Coil VC2 is sent to the anode of diode D4 and diode D6, electricity of the diode D6 anodes to parking power supply DC1 cathode through resistance R3 Position is 0V, therefore is sent to the control terminal of switching tube 200 without conductivity control signal, and switching tube 200 ends；To sum up state (1), (2) and (3) point Known to：When the switch of second switch module K2, which is in, to be connected, no conductivity control signal is sent to the control terminal of switching tube 200, is opened Pipe 200 is closed to end.It is disconnected when the switch of second switch module K2 is in：(1) if at second voltage type relay normally open contact KV22 In disconnection, when the solenoid valve spare coil VC2 that stops in emergency is in non-off state, diode D4 cut-offs, stop power supply DC1 or standby It will be opened through resistance R3, diode D6, diode D5 and resistance R4 by the solenoid valve spare coil VC2 that stops in emergency with power supply DC2 The conductivity control signal for closing pipe 200 is sent to the control terminal of switching tube 200, the conducting saturation of switching tube 200；If second voltage type after Electric appliance normally opened contact KV22, which is in, to be disconnected, and when the solenoid valve spare coil VC2 that stops in emergency is in off state, stop power supply DC1 The anode of diode D6, two poles can not be sent to by stopping in emergency solenoid valve spare coil VC2 through resistance R3 with stand-by power supply DC2 The current potential of pipe D6 anodes to parking power supply DC1 cathode is 0V, therefore is sent to the control terminal of switching tube 200 without conductivity control signal, is opened Pipe 200 is closed to end；(3) connected if second voltage type relay normally open contact KV22 is in, stop in emergency solenoid valve spare coil When VC2 is in non-off state, diode D4 ends, and parking power supply DC1 or stand-by power supply DC2 is standby by the solenoid valve that stops in emergency The conductivity control signal of switching tube 200 is sent to switch through resistance R3, diode D6, diode D5 and resistance R4 with coil VC2 The control terminal of pipe 200, the conducting saturation of switching tube 200；(4) connected if second voltage type relay normally open contact KV22 is in, promptly When electromagnetic valve for braking spare coil VC2 is in off state, parking power supply DC1 and stand-by power supply DC2 can not be by stopping in emergency Solenoid valve spare coil VC2 is sent to the anode of diode D6, electricity of the diode D6 anodes to parking power supply DC1 cathode through resistance R3 Position is 0V, therefore is sent to the control terminal of switching tube 200 without conductivity control signal, and switching tube 200 ends；It to sum up states (1), (2), (3) and (4) Known to point：1. being disconnected when the switch of second switch module K2 is in, and the solenoid valve spare coil VC2 that stops in emergency is in non-open circuit When state, conductivity control signal is sent to the control terminal of switching tube 200, the conducting saturation of switching tube 200；2. as second switch module K2 Switch be in and disconnect, and when the solenoid valve spare coil VC2 that stops in emergency is in off state, no conductivity control signal is sent to opening The control terminal of pipe 200 is closed, switching tube 200 ends；In fact in the present invention：Shape is disconnected when the switch of second switch module K2 is in When state, second voltage type relay normally open contact KV22 is in the case where connecting and is not present.

It is connected when the switch of second switch module K2 is in, and second voltage type relay normally open contact KV22 is in disconnected It opens, when the solenoid valve spare coil VC2 that stops in emergency is in non-off state (regarding as intact), diode D4 conductings, switching tube 200 cut-offs, parking power supply DC1 or stand-by power supply DC2 is by the solenoid valve spare coil VC2 that stops in emergency through resistance R3 and diode D4 constitute branch and resistance R6 and photoelectrical coupler U in light emitting diode constitute branch to second switch module K2 switch Power circuit is formed, the present invention at this time meets the resistance value selection of resistance R3 and resistance R6 claimed below：Flow through resistance R3 and electricity Hinder the sum of electric current of R6 the solenoid valve spare coil VC2 that stops in emergency of solenoid valve requirement of stopping in emergency extinction current 3/5ths between one third, and includes 3/5ths and one third, and the electric current for flowing through resistance R6 meets photoelectricity coupling Lumination of light emitting diode makes the phototriode of its light that the requirement being saturated be connected in clutch U.To realize：In the phase of stopping in emergency Between, second voltage type relay normally open contact KV22 is off, that is, the back-up circuit that stops in emergency is in and waits for the used time, both right The solenoid valve spare coil VC2 that stops in emergency in back-up circuit of stopping in emergency is powered in advance, and makes light emitting diode in photoelectrical coupler U Shining makes the phototriode of its light that saturation be connected；The back-up circuit that stops in emergency to be cut of changing to stops in emergency, that is, waits for When two voltage-type relay normally open contact KV22 are in connection：The solenoid valve spare coil VC2 that not only makes to stop in emergency is rapidly entered It is normal through-flow that the valve of control is closed, stopped in emergency by magnetic, solenoid valve quick acting of stopping in emergency；Again because of resistance R6 and The branch no current that light emitting diode is constituted in photoelectrical coupler U passes through, and the phototriode of light in photoelectrical coupler U is made to cut Only.

It is disconnected when the switch of second switch module K2 is in connect to be in second voltage type relay normally open contact KV22 When, if the solenoid valve spare coil VC2 that stops in emergency is in open circuit, light emitting diode is constituted in resistance R6 and photoelectrical coupler U Branch no current pass through, in photoelectrical coupler U light phototriode cut-off, otherwise, in resistance R6 and photoelectrical coupler U The branch that light emitting diode is constituted has electric current to pass through, and lumination of light emitting diode makes photosensitive three pole of its light in photoelectrical coupler U Pipe conducting saturation.

It is disconnected when the switch of second switch module K2 is in, no matter whether the solenoid valve spare coil VC2 that stops in emergency is in The equal no current of branch that light emitting diode is constituted in off state, resistance R6 and photoelectrical coupler U passes through, i.e. photoelectrical coupler U The phototriode of middle light is in cut-off.

It is disconnected when the switch of second switch module K2 is in, i.e., diode D4 branches are obstructed, and the solenoid valve that stops in emergency is standby When being in non-off state (regarding as intact) with coil VC2, by selecting the resistance value of resistance R4 and R5, make parking power supply DC1 Or stand-by power supply DC2 by the solenoid valve spare coil VC2 that stops in emergency through resistance R3, diode D6, diode D5 and resistance R4 It send the conductivity control signal to 200 control terminal of switching tube to meet the conducting saturation of switching tube 200 to require.The preferred switching tube of the present invention 200 be N-type metal-oxide-semiconductor.

When the phototriode of light in switching tube 200 and photoelectrical coupler U is in cut-off, the 5th voltage-type relay Device coil KV51 no powers, the i.e. contact of the 5th voltage-type relay are in static state, the 5th voltage-type relay normally open contact KV52 is off, and the 5th malfunction indicator lamp MIL5, which is in, to be extinguished.

When saturation is connected in the phototriode that light in saturation or/and photoelectrical coupler U is connected in switching tube 200, the 5th Voltage-type relay coil KV51 is powered, i.e., the contact of the 5th voltage-type relay is in dynamic, and the 5th voltage-type relay is normal Open contact KV52 in an ON state, the 5th malfunction indicator lamp MIL5 is in and lights.

Above-described major loop undercurrent switching control circuit of stopping in emergency, is used for：It is received during stopping in emergency tight When the deficient flow control signals that anxious electromagnetic valve for braking main coil circuit is sent out, control is switched to the back-up circuit that stops in emergency and carries out promptly Parking；Stop in emergency solenoid valve undercurrent switching control circuit and lending give when stop in emergency major loop overcurrent when, control is switched to The back-up circuit that stops in emergency stops in emergency.

The switch failure fault control circuit of above-described stop in emergency major loop overcurrent and first switch module：For Stop in emergency during stopping in emergency the switch failure short circuit of first switch module during major loop overcurrent and non-emergent parking when, it is right The major loop that stops in emergency carries out physical break protection, and passes through major loop overcurrent and the alarm of first switch Module Fail of stopping in emergency Circuit carries out the second malfunction indicator lamp MIL2 alarms, and is remained to the physical break for the major loop that stops in emergency and wait removing It goes to terminate (releasing) when parking power supply DC1 and stand-by power supply DC2, otherwise, one is protected to the physical break for the major loop that stops in emergency It is straight be maintained at diesel engine it is later stop in emergency during and non-emergent parking during, that is, be always held at later entire of diesel engine In implementation procedure.When receiving the mistake flow control signals that the major loop that stops in emergency is sent out during stopping in emergency, to stopping in emergency Major loop carries out physical break protection, and is always held in the later entire implementation procedure of diesel engine, parking power supply to be removed (releasing) is terminated when DC1 and stand-by power supply DC2；When the switch failure short circuit for receiving first switch module between non-emergent dwelling period When controlling signal, to stopping in emergency, major loop carries out physical break/holding tripping protection, and it is later to be always held at diesel engine In entire implementation procedure, (releasing) is terminated when removing parking power supply DC1 and stand-by power supply DC2；It is examined during non-emergent parking Measure first switch module switch failure short circuit, to stop in emergency major loop carry out physical break protection, also solve due to The switch failure short circuit of first switch module causes the problem of accidentally emergency stop during non-emergent parking.When stopping in emergency, major loop is in The physical break guard mode that the switch failure fault control circuit of overcurrent and first switch module carries out it, then to diesel engine When stopping in emergency, directly by major loop undercurrent switching control circuit of stopping in emergency, control is switched to the back-up circuit that stops in emergency It stops in emergency.

Fisrt fault indicator light MIL1 described above does not carry out physics for the major loop that stops in emergency during stopping in emergency and cuts Undercurrent prompt in the case of disconnected protection, i.e., the undercurrent under the non-disconnections of tertiary voltage type relay normally closed contact KV33 carries Show, when Fisrt fault indicator light MIL1 is lighted, the major loop that illustrates to stop in emergency is likely to contact poor electrical resistance and becomes larger or emergency stop Vehicle solenoid valve main coil VC1 open circuits or the circuit are breaking elsewhere, if the switch failure of first switch module is opened a way, certainly Being possible to damage including institute's power supply source causes for stream deficiency.

The switch failure fault control circuit of major loop overcurrent of stopping in emergency and first switch module receives overcurrent or The switch failure fault control signal of one switch module, tertiary voltage type relay power self-locking/holding self-locking, tertiary voltage type The contact of relay is in action state.

When contacts of the above-described second malfunction indicator lamp MIL2 for tertiary voltage type relay is in action state, The second malfunction indicator lamp MIL2 is lighted, the second malfunction indicator lamp MIL2 lighted illustrates stop in emergency major loop overcurrent or/and The switch failure short circuit of one switch module：

1. when the second malfunction indicator lamp MIL2 is lit during diesel engine stops in emergency by extinguishing, illustrate master of stopping in emergency Circuit overcurrent；

2. when the second malfunction indicator lamp MIL2 is lit during the non-emergent parking of diesel engine by extinguishing, illustrate first switch The switch failure short circuit of module；

3. stopping in emergency with during non-emergent parking when in diesel engine, the 4th malfunction indicator lamp MIL4 is always maintained at extinguishing shape State, then, the second malfunction indicator lamp MIL2 lighted illustrates major loop overcurrent of stopping in emergency；

4. after the second malfunction indicator lamp MIL2 is lighted during diesel engine stops in emergency by extinguishing, the 4th malfunction indicator lamp MIL4 can be lit during non-emergent parking, then follow-up in the second malfunction indicator lamp MIL2 lighted, explanation is stopped in emergency The short circuit of the switch failure of major loop overcurrent and first switch module；

5. after the second malfunction indicator lamp MIL2 is lighted during the non-emergent parking of diesel engine by extinguishing, then point is subsequently in The second bright malfunction indicator lamp MIL2 illustrates the switch failure short circuit of first switch module.

Above-described 4th malfunction indicator lamp MIL4, the switch for first switch module K1 stop diesel engine is non-emergent Short circuit of failing during vehicle prompts, if diesel engine, during non-emergent parking, the switch failure of first switch module K1 is short-circuit, then point Otherwise bright 4th malfunction indicator lamp MIL4 keeps extinguishing.The present invention due to assert second switch module K2 be serviceable condition, therefore During diesel engine stops in emergency, the 4th malfunction indicator lamp MIL4 is in OFF state.

Above-described third malfunction indicator lamp MIL3 is prompted when failing for the power supply DC1 that stops, when parking power supply third When malfunction indicator lamp MIL3 is lighted, the power supply DC1 output voltages that illustrate to stop are less than the KV11 maintenances of first voltage type relay coil Voltage is equal to zero, here when parking power supply DC1 output voltages less than first voltage type relay coil KV11 maintenance voltages or Parking power supply DC1 failures (or halting vehicle power supply DC1 dead electricity or decompression) are regarded as when equal to zero.

Above-described 5th malfunction indicator lamp MIL5 is used for diesel engine (second switch module during non-emergent parking The switch of K2 is off) and the back-up circuit that stops in emergency during stop in emergency stand by (second switch mould The switch of block K2 in an ON state, and second voltage type relay normally open contact KV22 be in disconnect) when, if stopping in emergency electricity Magnet valve spare coil VC2 is in non-off state, lights the 5th malfunction indicator lamp MIL5, prompts user's solenoid valve that stops in emergency standby It is intact with coil VC2 contact, otherwise, extinguish the 5th malfunction indicator lamp MIL5, user is prompted to stop in emergency solenoid valve spare coil VC2 open circuits.

The rated voltage of first voltage type relay coil KV11 described above is more than the rated voltage of parking power supply DC1, Be conducive to the rated voltage for making first voltage type relay coil KV11 maintenance voltages close to parking power supply DC1, but ensure again The contact of first voltage type relay normally becomes dynamic from static, and the present invention selects first voltage type relay coil KV11's Rated voltage is equal to the 106% of the rated voltage of parking power supply DC1.

Above-described first voltage type relay two-way contact KV12, second voltage type relay normally open contact KV22, And the maximum current that tertiary voltage type relay normally closed contact KV33 is allowed to flow through is all higher than or equal to the volume for stopping power supply DC1 Constant current.

Above-described first current relay coil KI11：When the electric current flowed through is more than or equal to its rated current the The contact of one current relay acts, i.e., normally opened contact is connected, and normally-closed contact disconnects；When the electric current flowed through is less than its specified electricity The contact of the first current relay is in static state when stream, i.e. normally opened contact disconnects, and normally-closed contact is connected.

Above-described second current relay coil KI21：The second electricity when the electric current flowed through is more than its rated current The contact of flow pattern relay acts, i.e., normally opened contact is connected, and normally-closed contact disconnects；When the electric current flowed through is less than or equal to its specified electricity The contact of the second current relay is in static state when stream, i.e. normally opened contact disconnects, and normally-closed contact is connected.

The rated current of the first current relay coil KI11 of the above is set equal to anxious electromagnetic valve for braking main coil The extinction current of VC1；The rated current of the second current relay coil KI21 is set equal to anxious electromagnetic valve for braking The maximum allowed current of main coil VC1.

The above-described extinction current for stopping in emergency solenoid valve main coil VC1 is to refer to ensure the electricity that stops in emergency Magnet valve works normally the minimum current for flowing through the solenoid valve main coil VC1 that stops in emergency.

The above-described maximum allowed current for stopping in emergency solenoid valve main coil VC1 is to refer to ensure the electricity that stops in emergency Magnet valve works normally, and will not burn out the maximum operating currenbt for the solenoid valve main coil VC1 that stops in emergency.

When the electric current that solenoid valve main coil VC1 flows through that stops in emergency is permitted in its extinction current to maximum when stopping in emergency When perhaps between electric current, the identification of the present invention solenoid valve main coil VC1 that stops in emergency is in normal operating conditions, otherwise, assert urgent The major loop that stops breaks down.

The above-described extinction current for stopping in emergency solenoid valve spare coil VC2 is to refer to ensure to stop in emergency Solenoid valve works normally the minimum current for flowing through the solenoid valve spare coil VC2 that stops in emergency.

Identification of the present invention can guarantee that the output of parking power supply DC1 when the contact of first voltage type relay is attracted (action) is Normal output.

The parking power supply DC1 of the above-described circuit that stops in emergency and stand-by power supply DC2 handoff procedures are as follows：

(1) the common end Yu normally open end of first voltage type relay two-way contact KV12 is connected, and power supply DC1 is to parking for parking Loop power supply；

(1) the common end of first voltage type relay two-way contact KV12 is connected with normal-closed end, is switched to stand-by power supply (DC2) to parking loop power supply；

3) stand-by power supply DC2 to parking loop power supply during, wait stop power supply DC1 output revert to normal when, first Voltage-type relay coil KV11 obtains electric, the contact action of first voltage type relay：

First voltage type relay two-way contact KV12 common end Yu normally open end connect, restore parking power supply DC1 to Stop loop power supply；

(2) first voltage type relay normally closed contact KV13 is disconnected, and the third malfunction indicator lamp MIL3 lighted extinguishes.

The process in the control parking circuit of the above-described circuit that stops in emergency is as follows：

1, assert that second switch module K2 is intact, first switch module K1 quality is set as being unknown：

2, when the switch of second switch module K2 in an ON state, that is, stop in emergency during, then switching tube 100 end, Switching tube 200 ends：

1) switching tube 100 ends, and the contact of the 4th voltage-type relay is in static state, is not produced to tertiary voltage type relay Raw control signal, and the 4th malfunction indicator lamp MIL4 is to extinguish,

2) switching tube 200 ends, and the 5th voltage-type relay coil KV51 is led by the phototriode in photoelectrical coupler U It is logical to control whether to be powered with cut-off：

(1) disconnected when second voltage type relay normally open contact KV22 is in, that is, the back-up circuit that stops in emergency is in for use shape When state：

1. if the solenoid valve spare coil VC2 that stops in emergency is in non-off state, constituted through resistance R3 and diode D4 Branch and resistance R6 and photoelectrical coupler U in light emitting diode constitute branch jointly to for use back-up circuit that stops in emergency In the solenoid valve spare coil VC2 that stops in emergency be powered in advance, and set pre- electrical current in the solenoid valve spare coil VC2 that stops in emergency Extinction current 3/5ths between one third, and lumination of light emitting diode makes its light in photoelectrical coupler U Phototriode conducting saturation, the 5th voltage-type relay coil KV51 is powered, and the contact of the 5th voltage-type relay is in Dynamically, in an ON state, the 5th malfunction indicator lamp MIL5 is lighted the 5th voltage-type relay normally open contact KV52, prompts user The solenoid valve spare coil VC2 that stops in emergency in for use back-up circuit that stops in emergency is in non-off state, with stopping in emergency Back-up circuit can be completed to stop in emergency,

2. if the solenoid valve spare coil VC2 that stops in emergency is in breaking, nothing in the solenoid valve spare coil VC2 that stops in emergency Electric current passes through, the branch that light emitting diode is constituted in branch and resistance R6 and photoelectrical coupler U that resistance R3 and diode D4 are constituted The equal no current in road, light emitting diode does not shine in photoelectrical coupler U, the phototriode cut-off of light, the 5th voltage-type after The contact of electric apparatus coil KV51 no powers, the 5th voltage-type relay is in static state, the 5th voltage-type relay normally open contact KV52 is off, and the 5th malfunction indicator lamp MIL5 extinguishes, urgent in the back-up circuit that stops in emergency for prompting user for use Electromagnetic valve for braking spare coil VC2 is in off state, cannot complete to stop in emergency with the back-up circuit that stops in emergency,

(2) connected when second voltage type relay normally open contact KV22 is in, the branch that resistance R3 and diode D4 are constituted And short circuit, the back-up circuit that stops in emergency carry out urgent the branch that light emitting diode is constituted in resistance R6 and photoelectrical coupler U simultaneously Parking toll：

1. in photoelectrical coupler U light phototriode cut-off, not to stop in emergency solenoid valve spare coil VC2 whether Open circuit detection, the 5th voltage-type relay coil KV51 no powers, the 5th malfunction indicator lamp MIL5 extinguish, and the 5th failure refers at this time Show that lamp MIL5 instructions do not indicate that solenoid valve spare coil VC2 open circuits of stopping in emergency,

2. if the solenoid valve spare coil VC2 that stops in emergency is in non-off state, stop in emergency solenoid valve spare coil VC2 Normal through-flow magnetic is rapidly entered, the valve of control is closed, stopped in emergency by solenoid valve quick acting of stopping in emergency, no Then, the solenoid valve spare coil VC2 no currents that stop in emergency pass through, and the solenoid valve that stops in emergency cannot close the valve of control, i.e., The solenoid valve that stops in emergency cannot be completed to stop in emergency,

3) wait for that the switch of second switch module K2 disconnects, i.e., when into during non-emergent parking, second voltage type relay Device normally opened contact KV22 is disconnected/is remained open；

3, when the switch of second switch module K2 is off, i.e., during non-emergent parking, in photoelectrical coupler U by The phototriode of light ends, and the 5th voltage-type relay coil KV51 is controlled whether to lead to by the conducting of switching tube 200 with cut-off Electricity, and cut-off and the admittance of the switch on and off control switching tube 100 of first switch module K1：

It is disconnected 1) if the switch of first switch module K1 is in, switching tube 100 ends, and the 4th voltage-type relay touches Point does not generate control signal in static state to tertiary voltage type relay, and the 4th malfunction indicator lamp MIL4 is to extinguish,

It is connected 2) if the switch of first switch module K1 is in, the conducting saturation of switching tube 100, the 4th voltage-type relay Contact be in dynamic：

(1) the 4th voltage-type relay normally open contact KV42 is connected, and control signal is generated to tertiary voltage type relay, if Tertiary voltage type relay is in energization self-locking, then tertiary voltage type relay remains powered on self-locking, otherwise, triggers tertiary voltage Type relay power and self-locking,

(2) the 4th voltage-type relay normally open contact KV43 is connected, and lights the 4th malfunction indicator lamp MIL4, and user is prompted to exist The switch failure short circuit of first switch module K1 during non-emergent parking,

3) control whether switching tube 200 is powered to the 5th voltage-type relay coil KV51：

(1) when the solenoid valve spare coil VC2 that stops in emergency is in non-off state, then the conducting of switching tube 200 is saturated, and the 5th Voltage-type relay coil KV51 is powered, and the contact of the 5th voltage-type relay is in dynamic, the 5th voltage-type relay normally open In an ON state, the 5th malfunction indicator lamp MIL5 is lighted contact KV52, prompts the electricity that stops in emergency during the non-emergent parking of user Magnet valve spare coil VC2 is in non-off state,

(2) when the solenoid valve spare coil VC2 that stops in emergency is in off state, then switching tube 200 ends, the 5th voltage-type The contact of relay coil KV51 no powers, the 5th voltage-type relay is in static state, the 5th voltage-type relay normally open contact KV52 is off, and the 5th malfunction indicator lamp MIL5 extinguishes, and prompts the solenoid valve that stops in emergency during the non-emergent parking of user Spare coil VC2 is in open circuit, and the back-up circuit that stops in emergency cannot complete the task of stopping in emergency,

4) whether no matter the first current relay normally-closed contact KI12 is connected, second voltage type relay coil KV21 is equal Must not be electric, the contact of second voltage type relay is in static state, and Fisrt fault indicator light MIL1 extinguishes；

4, when the switch of second switch module K2 in an ON state, that is, stop in emergency during：

If 1) recognize stop in emergency solenoid valve main coil VC1 by electric current be more than its maximum allowed current when, second The contact of current relay is in dynamic, i.e. the second current relay normally opened contact KI22 is connected, to tertiary voltage type after Electric appliance generates control signal, if tertiary voltage type relay is in energization self-locking, tertiary voltage type relay remains powered on certainly Lock, otherwise, triggering tertiary voltage type relay power and self-locking,

If 2) recognize stop in emergency solenoid valve main coil VC1 by electric current be less than or equal to maximum allowed current when, the The contact of two current relay is in static state, i.e. the second current relay normally opened contact KI22 is disconnected, not to tertiary voltage Type relay generates control signal；

5, it is powered when tertiary voltage type relay is in, i.e., the contact of tertiary voltage type relay is in dynamic：

1) the tertiary voltage type relay normally closed contact KV33 being serially connected in stopping in emergency major loop is disconnected, to stopping in emergency Major loop carries out physical break protection,

2) common end Yu normally open end of tertiary voltage type relay two-way contact KV34 is connected, and lights the second malfunction indicator lamp MIL2 prompts user to stop in emergency the switch failure short circuit of major loop overcurrent or/and first switch module：

(1) it is lit by extinguishing during diesel engine stops in emergency as the second malfunction indicator lamp MIL2, illustrates master of stopping in emergency Circuit overcurrent,

(2) it is lit by extinguishing during the non-emergent parking of diesel engine as the second malfunction indicator lamp MIL2, illustrates first switch The switch failure short circuit of module K1,

(3) stop in emergency with during non-emergent parking when in diesel engine, the 4th malfunction indicator lamp MIL4 is always maintained at extinguishing shape State, then, the second malfunction indicator lamp MIL2 lighted illustrate major loop overcurrent of stopping in emergency,

(4) after the second malfunction indicator lamp MIL2 is lighted during diesel engine stops in emergency by extinguishing, the 4th malfunction indicator lamp MIL4 can be lit during non-emergent parking, then follow-up in the second malfunction indicator lamp MIL2 lighted, explanation is stopped in emergency The short circuit of the switch failure of major loop overcurrent and first switch module K1,

(5) after the second malfunction indicator lamp MIL2 is lighted during the non-emergent parking of diesel engine by extinguishing, then point is subsequently in The second bright malfunction indicator lamp MIL2 illustrates the switch failure short circuit of first switch module K1；

6, when the switch of second switch module K2 in an ON state, that is, stop in emergency during, solenoid valve to be stopped in emergency Main coil VC1 by electric current be less than its extinction current when, the contact of the first current relay is in static state, the first electricity Flow pattern relay normally closed contact KI12 is connected, and second voltage type relay coil KV21 obtains electric, and second voltage type relay touches Point is in dynamic：

1) second voltage type relay normally open contact KV22 is connected, if the solenoid valve spare coil VC2 that stops in emergency is in non- Off state, then the solenoid valve spare coil VC2 that stops in emergency rapidly enter normal through-flow magnetic by being powered in advance, and stop in emergency electromagnetism The valve of control is closed in valve quick acting, is stopped in emergency, otherwise, the back-up circuit that stops in emergency cannot be completed to stop in emergency Task,

2) second voltage type relay normally open contact KV23 is connected：

(1) if the contact of tertiary voltage type relay is in static state, the i.e. public affairs of tertiary voltage type relay two-way contact KV34 When end is connected with normal-closed end altogether, Fisrt fault indicator light MIL1 is lighted, prompts user not carry out the urgent of physical break protection and stops The undercurrent in car owner circuit,

(2) if the contact of tertiary voltage type relay is in dynamic, the i.e. public affairs of tertiary voltage type relay two-way contact KV34 End is disconnected with normal-closed end altogether, and Fisrt fault indicator light MIL1 extinguishes；

7, when flow through the solenoid valve main coil VC1 that stops in emergency electric current be less than or equal to its maximum allowed current, be more than or equal to When its extinction current, the major loop that stops in emergency control diesel engine stops in emergency；

8, it after tertiary voltage type relay power self-locking, waits removing parking power supply DC1 and stand-by power supply DC2, third electricity The contact of die mould relay is static state by Dynamic- Recovery.

In the present invention：Since the resistance value of biasing resistor R4 and R5 are very big, therefore while stopping in emergency, is once switched to and stops in emergency Back-up circuit carries out carry out emergency stop, after the switch of second switch module K2 disconnects, second voltage type relay coil KV21 warps The passage current very little that its second voltage type relay normally open contact KV22 being closed is constituted, therefore flow through second voltage type relay The electric current of coil KV21 is far smaller than second voltage type relay and keeps the requirement being attracted, that is, waits for the switch of second switch module K2 After disconnection, the contact of second voltage type relay reverts to static state.

Claims

The circuit 1. one kind is stopped in emergency, including parking power supply (DC1), stand-by power supply (DC2), alarm power supply (DC3), first voltage Type relay, second voltage type relay, tertiary voltage type relay, the 4th voltage-type relay, the 5th voltage-type relay, First current relay, the second current relay, the solenoid valve that stops in emergency, Fisrt fault indicator light (MIL1), the second event Hinder indicator light (MIL2), third malfunction indicator lamp (MIL3), the 4th malfunction indicator lamp (MIL4), the 5th malfunction indicator lamp (MIL5), first switch module (K1), second switch module (K2), switching tube (100), switching tube (200), diode D1, two Pole pipe D2, diode D3, diode D4, diode D5, diode D6, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, photoelectrical coupler (U)；It is characterized in that, the solenoid valve that stops in emergency is that twin coil stops in emergency solenoid valve, The coil of solenoid valve of stopping in emergency is made of spare two groups of coils of advocating peace；The first voltage type relay coil (KV11) is straight It connects and (DC1) and is connect with parking power supply, the anode of parking power supply (DC1) is normal with first voltage type relay two-way contact (KV12) Beginning is connected, and the anode of stand-by power supply (DC2) is connected with the normal-closed end of first voltage type relay two-way contact (KV12), The cathode of stand-by power supply (DC2) is connected with the cathode of parking power supply (DC1)；First current relay coil (KI11) is successively Concatenate that the second current relay coil (KI21), tertiary voltage type relay normally closed contact (KV33), stop in emergency solenoid valve Main coil (VC1), first switch module (K1) switch after, the other end and first of the first current relay coil (KI11) The common end of voltage-type relay two-way contact (KV12) is connected, the other end of the switch of first switch module (K1) and parking The cathode of power supply (DC1) is connected, and foregoing circuit constitutes first with parking power supply (DC1) or stand-by power supply (DC2) and stops back Road, first parking circuit is the major loop that stops in emergency, that is, solenoid valve main coil circuit of stopping in emergency；Stop in emergency electromagnetism Valve spare coil (VC2) be sequentially connected in series second voltage type relay normally open contact (KV22), second switch module (K2) switch Afterwards, stop in emergency solenoid valve spare coil (VC2) the other end and first voltage type relay two-way contact (KV12) it is public End is connected, and the other end of the switch of second switch module (K2) is connected with the cathode of parking power supply (DC1), foregoing circuit with Parking power supply (DC1) or stand-by power supply (DC2) constitute Article 2 parking circuit, and the Article 2 parking circuit is standby to stop in emergency With circuit, that is, solenoid valve spare coil circuit of stopping in emergency；Second current relay normally opened contact (KI22) and tertiary voltage After type relay normally open contact (KV32) and the 4th voltage-type relay normally open contact (KV42) are connected with each other, one end concatenates third Voltage-type relay coil (KV31) accesses the common end of first voltage type relay two-way contact (KV12), other end access afterwards The cathode of parking power supply (DC1), foregoing circuit constitute Article 3 parking circuit with parking power supply (DC1) or stand-by power supply (DC2), Article 3 parking circuit is the switch failure fault control circuit of major loop overcurrent and first switch module of stopping in emergency；The The common end phase of one end and first voltage type relay two-way contact (KV12) of one current relay normally-closed contact (KI12) Connection, the other end concatenate second voltage type relay coil (KV21) and access second voltage type relay normally open contact (KV22) afterwards With on the connecting line of second switch module (K2) switch, foregoing circuit constitutes the with parking power supply (DC1) or stand-by power supply (DC2) Four parking circuits, Article 4 parking circuit is major loop undercurrent switching control circuit of stopping in emergency；4th voltage One end of type relay coil (KV41) is connected with the common end of first voltage type relay two-way contact (KV12), the other end It is connected with the hot end of switching tube (100), the cold end of switching tube (100) accesses the solenoid valve main coil that stops in emergency (VC1) on the connecting line switched with first switch module (K1), one end and the first voltage type relay two-way contact of resistance R1 (KV12) common end is connected, and the other end and the anode of diode D1 and the anode of diode D3 are connected with each other, diode D3 Cathode access second voltage type relay normally open contact (KV22) with second switch module (K2) switch connecting line on, two poles The cathode of pipe D1 is connected with the anode of diode D2, the cathode of diode D2 and the control terminal and resistance R2 of switching tube (100) One end it is connected with each other, the cathode of the other end of resistance R2 access parking power supply (DC1), foregoing circuit and parking power supply (DC1) Or stand-by power supply (DC2) constitutes Article 5 parking circuit, the Article 5 parking circuit is opened in the major loop that stops in emergency first Close the switch failure short-circuit detecting circuit of module；One end access of resistance R3 is stopped in emergency solenoid valve spare coil (VC2) and the On the connecting line of two voltage-type relay normally open contacts (KV22), the other end of resistance R3 and the anode and diode of diode D4 The anode of D6 is connected with each other, cathode access second voltage type relay normally open contact (KV22) and the second switch mould of diode D4 On the connecting line of block (K2) switch, the cathode of diode D6 is connected with the anode of diode D5, cathode and the electricity of diode D5 One end of resistance R4 is connected, and the other end and the control terminal of switching tube (200) and one end of resistance R5 of resistance R4 is connected with each other, electricity The cathode of the other end access parking power supply (DC1) of R5 is hindered, the cold end of switching tube (200) is negative with the power supply (DC1) that stops Pole is connected, and the hot end of switching tube (200) concatenates the 5th voltage-type relay coil (KV51) and accesses first voltage type afterwards The common end of relay two-way contact (KV12), one end access of resistance R6 are stopped in emergency solenoid valve spare coil (VC2) and the On the connecting line of two voltage-type relay normally open contacts (KV22), the other end of resistance R6 and in photoelectrical coupler (U) luminous two The anode of pole pipe is connected, and the cathode of light emitting diode accesses second voltage type relay normally open contact in photoelectrical coupler (U) (KV22) with second switch module (K2) switch connecting line on, in photoelectrical coupler (U) collector of phototriode with open The hot end for closing pipe (200) is connected, the emitter of phototriode and parking power supply (DC1) in photoelectrical coupler (U) Cathode is connected, foregoing circuit and parking power supply (DC1) or stand-by power supply (DC2) composition Article 6 parking circuit, and the described 6th Item parking circuit is stop in emergency in stopping in emergency back-up circuit solenoid valve spare coil energization and breaking measure loop in advance；First Voltage-type relay normally closed contact (KV13) concatenation third malfunction indicator lamp (MIL3) (DC3) and connects with alarm power supply afterwards, with report Alert power supply (DC3) constitutes parking power-fail alarm circuit；The common end of tertiary voltage type relay two-way contact (KV34) with The anode of alarm power supply (DC3) is connected, and the normally open end of tertiary voltage type relay two-way contact (KV34) concatenates the second failure Indicator light (MIL2) is connected with the cathode of alarm power supply (DC3) afterwards, and major loop mistake of stopping in emergency is constituted with alarm power supply (DC3) Stream and first switch Module Fail alarm circuit；The second electricity of normal-closed end concatenation of tertiary voltage type relay two-way contact (KV34) Die mould relay normally open contact (KV23), Fisrt fault indicator light (MIL1) are connected with the cathode of alarm power supply (DC3) afterwards, with Alarm power supply (DC3) constitutes the major loop undercurrent alarm circuit that stops in emergency；4th voltage-type relay normally open contact (KV43) is gone here and there It connects the 4th malfunction indicator lamp (MIL4) (DC3) and to connect with alarm power supply afterwards, first switch module is constituted with alarm power supply (DC3) Switch failure short-circuit alarming circuit；After 5th voltage-type relay normally open contact (KV52) concatenates the 5th malfunction indicator lamp (MIL5) It (DC3) and connects with alarm power supply, stops in emergency solenoid valve spare coil breaking alarming circuit with alarm power supply (DC3) composition；Institute The control terminal rear and diesel engine master control mould connected with each other of the control terminal and second switch module (K2) of stating first switch module (K1) The output of block is connected；The switching tube (100) is N-type metal-oxide-semiconductor or the switching tube (100) is NPN type triode；It is described Switching tube (200) is N-type metal-oxide-semiconductor or the switching tube (200) is NPN type triode.
The circuit 2. one kind according to claim 1 is stopped in emergency, which is characterized in that the solenoid valve that stops in emergency is double Coil stops in emergency solenoid valve, that is, the coil for the solenoid valve that stops in emergency is made of spare two groups of coils of advocating peace, its in two groups of coils In any group of coil be powered or two groups of coils are powered simultaneously, what the solenoid valve that stops in emergency obtained that magnetic action closes that it controls dies or breaks The valve of oil realizes that diesel engine stops in emergency；When two groups of coils are power failure state, the solenoid valve that stops in emergency is in loss of excitation shape State, solenoid valve control of stopping in emergency die or the valve of oil-break be in open；It stops in emergency one in two groups of coils of solenoid valve Group is set as the solenoid valve main coil (VC1) that stops in emergency, and another group is set as the solenoid valve spare coil (VC2) that stops in emergency.
The circuit 3. one kind according to claim 1 is stopped in emergency, which is characterized in that the first current relay coil (KI11) rated current is set equal to stop in emergency the extinction current of solenoid valve main coil (VC1)；Second electric current The rated current of type relay coil (KI21) is set equal to stop in emergency the maximum allowed current of solenoid valve main coil (VC1).
The circuit 4. one kind according to claim 1 is stopped in emergency, which is characterized in that the first voltage type relay is double To contact (KV12), second voltage type relay normally open contact (KV22) and tertiary voltage type relay normally closed contact (KV33) maximum current allowed to flow through is equal to or is more than the rated current of parking power supply (DC1).
The circuit 5. one kind according to claim 3 is stopped in emergency, which is characterized in that the solenoid valve main line that stops in emergency Circle (VC1) extinction current refer to：Ensure to stop in emergency solenoid valve normal work and flow through the solenoid valve main line that stops in emergency Enclose the minimum current of (VC1).
The circuit 6. one kind according to claim 3 is stopped in emergency, which is characterized in that the solenoid valve main line that stops in emergency Circle (VC1) maximum allowed current refer to：Ensure solenoid valve normal work of stopping in emergency, and the solenoid valve that stops in emergency will not be burnt out The maximum operating currenbt of main coil (VC1).
The circuit 7. one kind according to claim 1 is stopped in emergency, which is characterized in that the switching tube (100) and switch When pipe (200) is N-type metal-oxide-semiconductor, the grid of N-type metal-oxide-semiconductor is the control terminal of switching tube (100) and switching tube (200), N-type metal-oxide-semiconductor Drain electrode be switching tube (100) and switching tube (200) hot end, the source electrode of N-type metal-oxide-semiconductor is switching tube (100) and switchs Manage the cold end of (200)；When the switching tube (100) and switching tube (200) is NPN type triode, NPN type triode Base stage is the control terminal of switching tube (100) and switching tube (200), the current collection extremely switching tube (100) and switch of NPN type triode Manage the hot end of (200), the cold end of the transmitting extremely switching tube (100) and switching tube (200) of NPN type triode.
The circuit 8. one kind according to claim 1 is stopped in emergency, which is characterized in that the diode D1, diode D2, Diode D3, diode D4, diode D5 and diode D6 are switching diode；The N-type metal-oxide-semiconductor enhances for N-channel Type metal-oxide-semiconductor；The NPN type triode is NPN type switching transistor.
9. a kind of implementation method of circuit that stops in emergency according to claims 1 to 3 any bar, which is characterized in that including Following steps:

One, parking power supply (DC1) and stand-by power supply (DC2) handoff procedure

1) when stop power supply (DC1) export be it is normal when, first voltage type relay coil (KV11) it is electric, first voltage type after The contact of electric appliance acts：

(1) the common end Yu normally open end of first voltage type relay two-way contact (KV12) are connected, and parking power supply (DC1) is to parking Loop power supply,

(2) first voltage type relay normally closed contact (KV13) disconnects, and third malfunction indicator lamp (MIL3) is extinguished；

2) when the power supply (DC1) that stops fails, first voltage type relay coil (KV11) dead electricity, first voltage type relay Contact reverts to static state：

(1) the common end of first voltage type relay two-way contact (KV12) is connected with normal-closed end, is switched to stand-by power supply (DC2) To parking loop power supply,

(2) first voltage type relay normally closed contact (KV13) is connected, and third malfunction indicator lamp (MIL3) is lighted, and user is prompted to stop Vehicle power supply (DC1) fails；

3) when in stand-by power supply (DC2) to during parking loop power supply, when power supply (DC1) output of stopping reverts to normal, the One voltage-type relay coil (KV11) obtains electric, the contact action of first voltage type relay：

First voltage type relay two-way contact (KV12) common end Yu normally open end connect, restore parking power supply (DC1) to Stop loop power supply,

(2) first voltage type relay normally closed contact (KV13) disconnects, and the third malfunction indicator lamp (MIL3) lighted is extinguished；

Two, the process in control parking circuit

1) assert that second switch module (K2) is intact, first switch module (K1) quality is set as being unknown：

When diesel engine main control module sends out emergency shut-down control device signal to first switch module (K1) and second switch module (K2) Whether the switch of period, the switch connection of second switch module (K2), first switch module (K1) are connected to be unknown,

When diesel engine main control module does not send out emergency shut-down control device letter to first switch module (K1) and second switch module (K2) During number, the switch of second switch module (K2) disconnects, and it is unknown whether the switch of first switch module (K1) is broken as；

2) when the switch of second switch module (K2) in an ON state, that is, stop in emergency during, then switching tube (100) end, Switching tube (200) ends：

(1) switching tube (100) ends, and the contact of the 4th voltage-type relay is in static state, is not generated to tertiary voltage type relay Signal is controlled, and the 4th malfunction indicator lamp (MIL4) is to extinguish,

(2) switching tube (200) ends, and the 5th voltage-type relay coil (KV51) is by the phototriode in photoelectrical coupler (U) Conducting controls whether to be powered with cut-off：

1. being disconnected when second voltage type relay normally open contact (KV22) is in, that is, the back-up circuit that stops in emergency is stood by When：

If a. lumination of light emitting diode makes the phototriode of its light that saturation be connected in photoelectrical coupler (U)：

The solenoid valve spare coil (VC2) that illustrates to stop in emergency is in non-off state, and constituted through resistance R3 and diode D4 The branch that light emitting diode is constituted in branch and resistance R6 and photoelectrical coupler (U) is jointly to for use back-up circuit that stops in emergency In stop in emergency solenoid valve spare coil (VC2) in advance be powered, pre- electrical current is in the solenoid valve spare coil (VC2) that stops in emergency 3/5ths of extinction current between one third,

5th voltage-type relay coil (KV51) is powered, and the contact of the 5th voltage-type relay is in dynamic, the 5th voltage-type Relay normally open contact (KV52) is connected, and the 5th malfunction indicator lamp (MIL5) lights, prompt user it is for use stop in emergency it is spare The solenoid valve spare coil (VC2) that stops in emergency in circuit is in non-off state,

If b. light emitting diode does not shine in photoelectrical coupler (U), the phototriode of light ends：

The solenoid valve spare coil (VC2) that illustrates to stop in emergency is in off state, in the solenoid valve spare coil (VC2) that stops in emergency No current passes through,

The contact of the 5th voltage-type relay coil (KV51) no power, the 5th voltage-type relay is in static state, the 5th voltage Type relay normally open contact (KV52) disconnects, and the 5th malfunction indicator lamp (MIL5) is extinguished, prompt user it is for use stop in emergency it is standby With stopping in emergency in circuit, solenoid valve spare coil (VC2) is in off state,

2. being connected when waiting for that second voltage type relay normally open contact (KV22) is in, the branch constituted to resistance R3 and diode D4 And the branch while short circuit that light emitting diode is constituted in resistance R6 and photoelectrical coupler (U), i.e., using the back-up circuit that stops in emergency Carry out emergency shut-down control device：

A. in photoelectrical coupler (U) light phototriode cut-off, not to stop in emergency solenoid valve spare coil (VC2) whether Open circuit detection, the 5th voltage-type relay coil (KV51) no power, the 5th malfunction indicator lamp (MIL5) are extinguished,

If the solenoid valve spare coil (VC2) that b. stops in emergency is in non-off state, stop in emergency solenoid valve spare coil (VC2) Normal through-flow magnetic is rapidly entered, the valve of control is closed, stopped in emergency by solenoid valve quick acting of stopping in emergency, no Then, solenoid valve spare coil (VC2) no current that stops in emergency passes through, and the solenoid valve that stops in emergency cannot close the valve of control, The solenoid valve that stops in emergency cannot be completed to stop in emergency,

C. wait for that the switch of second switch module (K2) disconnects, i.e., when into during non-emergent parking, second voltage type relay Normally opened contact (KV22) disconnects；

3) when the switch of second switch module (K2) is off, i.e., during non-emergent parking, in photoelectrical coupler (U) by The phototriode of light ends, and the 5th voltage-type relay coil (KV51) is with cut-off control by the conducting of switching tube (200) No energization, and cut-off and the admittance of the switch on and off control switching tube (100) of first switch module (K1)：

(1) disconnected if the switch of first switch module (K1) is in, switching tube (100) cut-off, the 4th voltage-type relay touches Point does not generate control signal in static state to tertiary voltage type relay, and the 4th malfunction indicator lamp (MIL4) is to extinguish,

(2) connected if the switch of first switch module (K1) is in, switching tube (100) conducting saturation, the 4th voltage-type relay Contact be in dynamic：

1. the 4th voltage-type relay normally open contact (KV42) is connected, control signal is generated to tertiary voltage type relay, if the Three voltage-type relays are in energization self-locking, then tertiary voltage type relay remains powered on self-locking, otherwise, trigger tertiary voltage type Relay power and self-locking,

2. the 4th voltage-type relay normally open contact (KV43) is connected, the 4th malfunction indicator lamp (MIL4) is lighted, user is prompted to exist The switch failure short circuit of first switch module (K1) during non-emergent parking,

(3) the control that whether switching tube (200) is powered to the 5th voltage-type relay coil (KV51)：

1. if switching tube (200) conducting saturation, the 5th voltage-type relay coil (KV51) are powered, the 5th voltage-type relay Contact be in dynamic, the 5th voltage-type relay normally open contact (KV52) in an ON state, the 5th malfunction indicator lamp (MIL5) it lights, the solenoid valve spare coil (VC2) that illustrates to stop in emergency during non-emergent parking is in non-off state,

2. if switching tube (200) ends, the 5th voltage-type relay coil (KV51) no power, the 5th voltage-type relay Contact is in static state, and the 5th voltage-type relay normally open contact (KV52) is off, the 5th malfunction indicator lamp (MIL5) Extinguish, the solenoid valve spare coil (VC2) that stops in emergency during the prompt non-emergent parking of user is in off state；

4) when the switch of second switch module (K2) in an ON state, that is, stop in emergency during：

If (1) recognize stop in emergency solenoid valve main coil (VC1) by electric current be more than its maximum allowed current when, second electricity The contact of flow pattern relay be in dynamic, i.e. the second current relay normally opened contact (KI22) connect, to tertiary voltage type after Electric appliance generates control signal, if tertiary voltage type relay is in energization self-locking, tertiary voltage type relay remains powered on certainly Lock, otherwise, triggering tertiary voltage type relay power and self-locking,

If (2) recognize stop in emergency solenoid valve main coil (VC1) by electric current be less than or equal to maximum allowed current when, second The contact of current relay is in static state, i.e. the second current relay normally opened contact (KI22) disconnects, not to tertiary voltage Type relay generates control signal；

5) it is powered when tertiary voltage type relay is in, i.e., the contact of tertiary voltage type relay is in dynamic：

(1) the tertiary voltage type relay normally closed contact (KV33) being serially connected in stopping in emergency major loop disconnects, to master of stopping in emergency Circuit carries out physical break protection,

(2) the common end Yu normally open end of tertiary voltage type relay two-way contact (KV34) are connected, and light the second malfunction indicator lamp (MIL2), prompt user is stopped in emergency the switch failure short circuit of major loop overcurrent or/and first switch module：

1. when the second malfunction indicator lamp (MIL2) is lit during diesel engine stops in emergency by extinguishing, illustrates to stop in emergency and lead back Stream is passed by,

2. when the second malfunction indicator lamp (MIL2) is lit during the non-emergent parking of diesel engine by extinguishing, illustrate first switch mould The switch failure short circuit of block (K1),

3. stopping in emergency with during non-emergent parking when in diesel engine, the 4th malfunction indicator lamp (MIL4) is always maintained at extinguishing shape State, then, the second malfunction indicator lamp (MIL2) lighted illustrate major loop overcurrent of stopping in emergency,

4. after the second malfunction indicator lamp (MIL2) is lighted during diesel engine stops in emergency by extinguishing, the 4th malfunction indicator lamp (MIL4) it can be lit during non-emergent parking, then it is follow-up in the second malfunction indicator lamp (MIL2) lighted, illustrate urgent The short circuit of the switch failure of major loop overcurrent of stopping and first switch module (K1),

5. after the second malfunction indicator lamp (MIL2) is lighted during the non-emergent parking of diesel engine by extinguishing, then follow-up be in is lighted The second malfunction indicator lamp (MIL2), illustrate first switch module (K1) switch failure short circuit；

6) when the switch of second switch module (K2) in an ON state, that is, stop in emergency during, solenoid valve master to be stopped in emergency Coil (VC1) by electric current be less than its extinction current when, the contact of the first current relay is in static state, the first electricity Flow pattern relay normally closed contact (KI12) is connected, and second voltage type relay coil (KV21) obtains electric, second voltage type relay Contact enter dynamic, using stop in emergency back-up circuit control stop in emergency, and if at the contact of tertiary voltage type relay In static state, then Fisrt fault indicator light (MIL1) is lighted, user is prompted not carry out the major loop that stops in emergency of physical break protection Undercurrent, otherwise, Fisrt fault indicator light (MIL1) extinguish；

7) when flow through the solenoid valve main coil (VC1) that stops in emergency electric current be less than or equal to its maximum allowed current, be more than or equal to its When extinction current, the major loop that stops in emergency control diesel engine stops in emergency；

8) it after tertiary voltage type relay power self-locking, waits removing parking power supply (DC1) and stand-by power supply (DC2), third electricity The contact of die mould relay is static state by Dynamic- Recovery.
10. the implementation method of the circuit according to claim 9 that stops in emergency, which is characterized in that the electricity that stops in emergency The extinction current of magnet valve spare coil (VC2) refers to：Guarantee stop in emergency solenoid valve normal work and flow through and stop in emergency The minimum current of solenoid valve spare coil (VC2).