CN110187181A - A kind of resistor detection method and device - Google Patents
A kind of resistor detection method and device Download PDFInfo
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- CN110187181A CN110187181A CN201910581846.1A CN201910581846A CN110187181A CN 110187181 A CN110187181 A CN 110187181A CN 201910581846 A CN201910581846 A CN 201910581846A CN 110187181 A CN110187181 A CN 110187181A
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- electric heating
- resistance
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- heater strip
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1486—Means to prevent the substance from freezing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Resistance Heating (AREA)
Abstract
The present invention provides a kind of resistor detection method and device, after monitoring engine start, the first close command is sent to pressure pipe electric heating relay, when engine is starting, post-processing heating main relay and pressure pipe electric heating relay are in open state, again by returning to the first information after receiving pressure pipe electric heating relay response the first close command execution closed procedure, the first information characterizes the pressure pipe electric heating relay and is in closed state, the first voltage at the 6th stitch is acquired, and the resistance value that pump is heated to mouth is calculated based on first voltage.Technical solution provided by the invention, the heating power P that pump arrives mouth heater strip can be accurately calculated by the actual resistance for calculating pump to mouth heater strip, actual resistance i.e. by precalculating pipeline heating resistance wire, the heating power of pipeline heating resistance wire can be accurately calculated, and then guarantees that SCR pipeline thaws completely.
Description
Technical field
The present invention relates to Mechanical Industry Technology field more particularly to a kind of resistor detection method and devices.
Background technique
Urea liquid can freeze when being lower than subzero 11 degree, in order to guarantee to SCR aftertreatment system normal injection urea, so that
Emission compliance, it usually needs thaw to using electrically heated SCR pipe-line system.Using electrically heated SCR pipe-line system, root
It tables look-up to obtain the energy W0 for thawing and completing to need according to environment temperature, the heating power P of pipeline heating resistance wire in pipeline is carried out
Integral is thought to thaw when integral is to energy W0 and be completed.
When calculating the heating power P of pipeline resistive heater, the resistance value R of pipeline heating resistance wire is needed.Prior art tube
The resistance value R of road resistive heater is that a scalar quantity if the pipeline replaced in operational process causes the true of pipeline heating resistance wire
Real resistance value changes, and cannot realize automatically to gauged update；Also, the factors such as the aging with pipeline heating resistance wire
The actual resistance value for also resulting in pipeline heating resistance wire changes, and can not realize automatically to gauged update at this time.
Because scalar quantity cannot automatically update, it frequently can lead to scalar quantity and actual resistance value difference be larger, such as scalar quantity is inclined
Greatly, then the resistance wire time of integration is partially short, and when theoretical upper integral is to energy W0, actual conditions, which may thaw, to be had not been completed, in turn
The normal work for influencing SCR aftertreatment system seriously will lead to and build pressure failure, causes SCR aftertreatment system failure.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of resistor detection method and device, passes through and calculate pipeline adding thermal resistance
The actual resistance of silk, and then realize the purpose thawed completely to SCR pipeline.
To achieve the above object, the embodiment of the present invention provides the following technical solutions:
First aspect present invention discloses a kind of resistor detection method, is applied to controller, controller and SCR pipe-line system
Circuit be connected；The circuit includes post-processing heating main relay, first resistor, pressure pipe electric heating relay, pump to mouth
Heater strip and second resistance；The first stitch and the second stitch of the controller are respectively and in post-processing heating main relay
The both ends of coil are connected, and the one end switched in the post-processing heating main relay passes through the first resistor and the first power supply phase
Even, the other end switched in the post-processing heating main relay is connected with the 6th stitch of the controller；The controller
The first stitch and third stitch be connected respectively with the both ends of the pressure pipe electric heating relay coil；The pressure pipe electricity
The one end switched in heating relay is connected to mouth heater strip with the 6th stitch by the pump, the pressure pipe electric heating
The other end switched in relay is grounded by the second resistance, this method comprises:
After monitoring engine start, Xiang Suoshu pressure pipe electric heating relay sends the first close command；Described
The post-processing heating main relay and the pressure pipe electric heating relay are in open state when engine is inactive；
It receives the pressure pipe electric heating relay and responds first close command and execute the returned after closed procedure
One information, the first information characterize the pressure pipe electric heating relay and are in closed state；
Acquire the first voltage at the 6th stitch；
The resistance that the pump arrives mouth heater strip is calculated based on the first voltage.
Optionally, the circuit further includes that return pipe electric heating relay and pump arrive case heater strip；The of the controller
One stitch and the 4th stitch are connected with the both ends of the return pipe electric heating relay coil respectively, the return pipe electric heating
The one end switched in relay is connected to case heater strip with the 6th stitch by the pump, the return pipe electric heating relay
The other end switched in device is grounded by the second resistance, this method further include:
The pressure pipe electric heating relay is controlled to open；
The second close command, the reflux when the engine is inactive are sent to the return pipe electric heating relay
Pipe electric heating relay is in the open state；
It receives the return pipe electric heating relay and responds second close command and execute the returned after closed procedure
Two information, return pipe electric heating relay described in second information representation are in closed state；
Acquire the second voltage at the 6th stitch；
The resistance that the pump arrives case heater strip is calculated based on the second voltage.
Optionally, the circuit further includes pipette electric heating relay and case to pump heater strip；The of the controller
One stitch and the 5th stitch are connected with the both ends of the pipette electric heating relay coil respectively, the pipette electric heating
The one end switched in relay is connected by the case to pump heater strip with the 6th stitch, the pipette electric heating relay
The other end switched in device is grounded by the second resistance, this method further include:
The return pipe electric heating relay is controlled to open；
Third close command, the imbibition when the engine is inactive are sent to the pipette electric heating relay
Pipe electric heating relay is in the open state；
It receives the pipette electric heating relay and responds the third close command and execute the returned after closed procedure
Three information, pipette electric heating relay described in the third information representation are in closed state；
Acquire the tertiary voltage at the 6th stitch；
The case is calculated to the resistance for pumping heater strip based on the tertiary voltage.
Optionally, second source and pull-up resistor built in the 6th stitch, the pump to mouth heater strip, the pump arrive case
Heater strip passes through the pull-up resistor to pump heater strip with the case and connects the second source；
It is described that the resistance that the pump arrives mouth heater strip is calculated based on the first voltage, comprising:
Obtain the resistance value of the voltage value of the second source, the resistance value of the pull-up resistor and the second resistance；
By the first voltage, the resistance value and the second resistance of the voltage value of the second source, the pull-up resistor
Input information of the resistance value as parameter in the first preset resistive value calculation formula, obtain the resistance that the pump arrives mouth heater strip；Its
In, the first preset resistive value calculation formula is generated based on Ohm's law.
It is optionally, described that the resistance that the pump arrives case heater strip is calculated based on the second voltage, comprising:
Obtain the resistance value of the voltage value of the second source, the resistance value of the pull-up resistor and the second resistance；
By the second voltage, the resistance value and the second resistance of the voltage value of the second source, the pull-up resistor
Input information of the resistance value as parameter in the second preset resistive value calculation formula, obtain the resistance that the pump arrives case heater strip；Its
In, the second preset resistive value calculation formula is generated based on Ohm's law.
It is optionally, described that the case is calculated to the resistance for pumping heater strip based on the tertiary voltage, comprising:
Obtain the resistance value of the voltage value of the second source, the resistance value of the pull-up resistor and the second resistance；
By the resistance value and the second resistance of the tertiary voltage, the voltage value of the second source, the pull-up resistor
Input information of the resistance value as parameter in third preset resistive value calculation formula, obtain the case to pump heater strip resistance；Its
In, the third preset resistive value calculation formula is generated based on Ohm's law.
Second aspect of the present invention discloses a kind of resistor detecting device, is applied to controller, and the controller and SCR are managed
The circuit of system is connected；The circuit includes post-processing heating main relay, first resistor, pressure pipe electric heating relay, pump
To mouth heater strip and second resistance；The first stitch and the second stitch of the controller heat main relay respectively at the post-processing
Device coil is connected with both ends, and the one end switched in the post-processing heating main relay passes through the first resistor and the first electricity
Source is connected, and the other end switched in the post-processing heating main relay is connected with the 6th stitch of the controller；The control
First stitch of device processed is connected with third stitch respectively at the both ends of the pressure pipe electric heating relay coil；The pressure
The one end switched in pipe electric heating relay is connected to mouth heater strip with the 6th stitch by the pump, the pressure pipe electricity
The other end switched in machine electrothermal relay is grounded by the second resistance, which includes:
First close command transmission unit, for after monitoring engine start, the hot relay of Xiang Suoshu pressure pipe motor
Device sends the first close command；When the engine is inactive, the post-processing heating main relay and the pressure pipe electricity add
Electrothermal relay is in open state；
First receiving unit is closed for receiving the pressure pipe electric heating relay response the first close command execution
The ground first information is returned to after closing operation, the first information characterizes the pressure pipe electric heating relay and is in closed state；
First acquisition unit, for acquiring the first voltage at the 6th stitch；
First computing unit, for calculating the resistance that the pump arrives mouth heater strip based on the first voltage.
Optionally, the circuit further includes that return pipe electric heating relay and pump arrive case heater strip；The of the controller
One stitch and the 4th stitch are connected respectively at the both ends of the return pipe electric heating relay coil, the return pipe electric heating
The one end switched in relay is connected to case heater strip with the 6th stitch by the pump, the return pipe electric heating relay
The other end switched in device is grounded by the second resistance, described device further include:
First control unit is opened for controlling the pressure pipe electric heating relay；
Second close command transmission unit, for sending the second close command to the return pipe electric heating relay,
The return pipe electric heating relay is in the open state when the engine is inactive；
Second receiving unit is closed for receiving the return pipe electric heating relay response the second close command execution
The second information returned after closing operation, return pipe electric heating relay described in second information representation are in closed state；
Second acquisition unit, for acquiring the second voltage at the 6th stitch；
Second computing unit, for calculating the resistance that the pump arrives case heater strip based on the second voltage.
Optionally, the circuit further includes pipette electric heating relay and case to pump heater strip；The of the controller
One stitch and the 5th stitch are connected with the both ends of the pipette electric heating relay coil respectively, the pipette electric heating
The one end switched in relay is connected by the case to pump heater strip with the 6th stitch, the pipette electric heating relay
The other end switched in device is grounded by the second resistance, the device further include:
Second control unit is opened for controlling the pipette electric heating relay；
Third close command transmission unit, for sending third close command to the pipette electric heating relay,
The pipette electric heating relay is in the open state when the engine is inactive；
Third receiving unit is closed for receiving the pipette electric heating relay response third close command execution
The third information returned after closing operation, pipette electric heating relay described in the third information representation are in closed state；
Third acquisition unit, for acquiring the tertiary voltage at the 6th stitch；
Third computing unit, the resistance for calculating the case to pump heater strip based on the tertiary voltage.
Optionally, second source and pull-up resistor built in the 6th stitch, it is the pressure pipe electric heating relay, described
Return pipe electric heating relay and the coil in the pipette electric heating relay pass through described in the pull-up resistor connects
Second source；
First computing unit, comprising:
First acquisition unit, for obtaining the voltage value of the second source, the resistance value and described of the pull-up resistor
The resistance value of two resistance；
The resistance calculations unit for pumping mouth heater strip, for by the voltage value of the first voltage, the second source, institute
Input information of the resistance value of the resistance value and the second resistance of stating pull-up resistor as parameter in the first preset resistive value calculation formula,
Obtain the resistance that the pump arrives mouth heater strip；Wherein, the first preset resistive value calculation formula is generated based on Ohm's law.
A kind of resistor detection method and device provided based on the embodiments of the present invention, is monitoring engine start
Afterwards, Xiang Suoshu pressure pipe electric heating relay sends the first close command, and when the engine is starting, the post-processing adds
Hot main relay and the pressure pipe electric heating relay are in open state, then by receive the pressure pipe electric heating after
Electric appliance responds after first close command executes closed procedure and returns to the first information, and the first information characterizes the pressure pipe
Electric heating relay is in closed state, acquires the first voltage at the 6th stitch, and calculate based on the first voltage
Resistance value of the pump to mouth heating.Technical solution provided by the invention is closed by sending first to pressure pipe electric heating relay
Instruction is closed, responds the first information returned after the first close command executes closure behaviour when receiving pressure pipe electric heating relay
Afterwards, the first voltage at the 6th stitch is acquired, and the resistance that pump arrives mouth heater strip is calculated based on first voltage, by calculating pump
Actual resistance to mouth heater strip can accurately calculate the heating power P pumped to mouth heater strip, i.e., by precalculating pipe
The actual resistance of road resistive heater can accurately calculate the heating power of pipeline heating resistance wire, and then guarantee SCR pipeline
It thaws completely.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of circuit structure diagram of SCR pipe-line system provided in an embodiment of the present invention；
Fig. 2 is a kind of flow diagram of resistor detection method provided in an embodiment of the present invention；
Fig. 3 is a kind of equivalent circuit structure figure provided in an embodiment of the present invention；
Fig. 4 is a kind of flow diagram for calculating pump and arriving the resistive method of mouth heater strip provided in an embodiment of the present invention；
Fig. 5 is the flow diagram of another resistor detection method provided in an embodiment of the present invention；
Fig. 6 is a kind of flow diagram for calculating pump and arriving the resistive method of case heater strip provided in an embodiment of the present invention；
Fig. 7 is the flow diagram of another resistor detection method provided in an embodiment of the present invention；
Fig. 8 is a kind of flow diagram of resistive method of the calculating case provided in an embodiment of the present invention to pump heater strip；
Fig. 9 is a kind of structural schematic diagram of resistor detecting device provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In this application, the terms "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion,
So that the process, method, article or equipment for including a series of elements not only includes those elements, but also including not having
The other element being expressly recited, or further include for elements inherent to such a process, method, article, or device.Do not having
There is the element limited in the case where more limiting by sentence "including a ...", it is not excluded that in the mistake including the element
There is also other identical elements in journey, method, article or equipment.
By above-mentioned background technique it is found that the resistance value R of pipeline heating resistance wire is a scalar quantity in the prior art, therefore,
If the pipeline replaced in operational process causes the actual resistance value of pipeline heating resistance wire to change, cannot realize automatically to mark
Quantitative update；Also, the factors such as the aging with pipeline heating resistance wire also result in the true resistance of pipeline heating resistance wire
Value changes, and can not realize automatically to gauged update at this time.Due to that cannot be updated to scalar quantity, often lead
Cause scalar quantity and actual resistance value difference larger, such as scalar quantity is bigger than normal, then the resistance wire time of integration is partially short, theoretical upper integral to energy
When measuring W0, actual conditions, which may thaw, to be had not been completed, and then influences the normal work of SCR aftertreatment system, seriously will lead to
Pressure failure is built, SCR aftertreatment system failure is caused.
Therefore, the present invention discloses a kind of resistor detection method and device, by the reality for precomputing pipeline heating silk
Resistance, the actual resistance based on pipeline heating silk calculates the heating power P of resistive heater, to the heating power of resistive heater
P is integrated, and when integral is to energy W0, SCR pipeline, which thaws, completes.
The present invention provides a kind of resistance electric measuring method and device, be applied to controller (Electronic ControlUnit,
ECU), controller ECU is connected with the circuit of SCR pipe-line system.
With reference to Fig. 1, the circuit structure diagram of SCR pipe-line system is shown, the circuit of the SCR pipe-line system, comprising: post-processing
Heating main relay, first resistor R1, pressure pipe electric heating relay, pump to mouth heating, return pipe electric heating relay, pump arrive
Case heater strip, pipette electric heating relay, case to pump heater strip and second resistance R2.
Wherein, the first stitch X1 and the second stitch X2 of controller ECU heats main relay coil with post-processing respectively
Both ends be connected, one end for switching passes through first resistor R1 and the first power supply Battery+ phase in post-processing heating main relay
Even, the other end switched in post-processing heating main relay is connected with the 6th stitch X6 of controller ECU；The of controller ECU
One stitch X1 and third stitch X3 is connected with the both ends of pressure pipe electric heating relay coil respectively；Pressure pipe electric heating relay
The one end switched in device is connected by pump to mouth heater strip with the 6th stitch X6, is switched in pressure pipe electric heating relay another
End is connected with the first end of second resistance R2；The first stitch X1 of controller ECU and the 4th stitch X4 add with return pipe electricity respectively
The both ends of electrothermal relay coil are connected, and the one end switched in return pipe electric heating relay passes through pump to case heater strip and control
The 6th stitch X6 of device ECU is connected, the first end of the other end and second resistance R2 that switch in return pipe electric heating relay；Control
The first stitch X1 of device ECU processed and the 5th stitch X5 is connected with the both ends of pipette electric heating relay coil respectively, imbibition
The one end switched in pipe electric heating relay is connected by case to pump heater strip with the 6th stitch of controller ECU, pipette electricity
The other end switched in heating relay is connected with the first end of second resistance R2, the second end ground connection of second resistance R2.
After the engine started, it in the case where the inc situation of main relay is heated in post-processing, is controlled by controller ECU
Pressure pipe electric heating relay, return pipe electric heating relay in the circuit of SCR pipe-line system, pipette electric heating relay
It is successively closed, situations such as whether circuit of SCR pipe-line system occurs short circuit, short circuit can be checked.
The present invention provides a kind of resistor detection method and device, in the work for the circuit script for not changing SCR pipe-line system
On the basis of process and circuit structure, then the pressure pipe electricity controlled by controller ECU in the circuit diagram of SCR pipe-line system adds
Electrothermal relay, return pipe electric heating relay, pipette electric heating relay are successively closed, and then are successively calculated and pressure pipe
Electric heating relay pumps resistance, return pipe electric heating relay to mouth heater strip accordingly and pump the electricity for arriving case heater strip accordingly
Resistance, the corresponding case of pipette electric heating relay to the resistance for pumping heater strip, realize the practical resistance for calculating pipeline resistive heater
Value, finally closure post-processing heating main relay, pressure pipe electric heating relay, return pipe electric heating relay and pipette
Electric heating relay, and the actual resistance based on the pipeline heating resistance wire precomputed accurately calculate pipeline heating electricity
The heating power P of silk is hindered, and then guarantees that SCR pipeline thaws completely.
Add it should be noted that pipeline heating resistance wire refers to pumping to mouth heater strip, pump to case heater strip and case to pump
Heated filament, SCR pipeline refer to urea pump to the pressure pipe of urea mouth, the return pipe of urea pump to urea box or urea box to urine
The pipette of element pump.
Further, it should be noted that the actual resistance based on the pipeline heating resistance wire precomputed, accurately
The heating power P of pipeline resistive heater is calculated, and then guarantees that SCR pipeline carries out thawing completely and refers to based on precalculating
The resistance of pump out to mouth heater strip accurately calculates the heating power P that pump arrives mouth heater strip, and then guarantees urea pump to urea
The pressure pipe of mouth thaws completely, or accurately calculates pump to case heater strip based on the pump precomputed to case heater strip
Heating power P, and then guarantee that the return pipe of urea pump to urea box thaws completely, or arrived based on outlet is precalculated
Pump heater strip resistance accurately calculate case to pump heater strip heating power P, and then guarantee urea box to urea pump pipette
It thaws completely.
Based on the circuit diagram of above-mentioned SCR pipe-line system shown in fig. 1, the embodiment of the present invention provides a kind of resistance electrical measurement side
Method is applied to controller with reference to Fig. 2 and shows a kind of flow diagram of resistor detection method provided in an embodiment of the present invention,
The resistance electric measuring method the following steps are included:
S201: after monitoring engine start, the first close command is sent to pressure pipe electric heater.
It should be noted that when engine is inactive, post-processing heating main relay, pressure pipe electric heating relay,
Return pipe electric heating relay and pipette electric heating relay are in open state.
During specifically executing step S201, monitors whether engine starts by controller ECU, sent out when detecting
After motivation starting, controller ECU sends the first closure to pressure pipe electric heating relay by the circuit of SCR pipe-line system and refers to
It enables.
It should be noted that the first closure information can execute closed procedure for control pressure pipe electric heating relay, it can
It is set according to practical reference, the embodiment of the present invention is not limited.
S202: it receives pressure pipe electric heater and responds the first information returned after the first close command execution closed procedure.
It should be noted that first information characterization pressure pipe electric heating relay is in closed state.
During specifically executing step S202, the execution of the first close command is responded by receiving pressure pipe electric heater
The first information returned after closed procedure determines that pressure pipe electric heating relay is in closed state.
S203: the first voltage at the 6th stitch of acquisition.
During specifically executing step S203, controller ECU is receiving pressure pipe electric heating relay response first
After the first information returned after instruction execution closed procedure, the first voltage at the 6th stitch X6 is acquired.
It should be noted that second source and pull-up resistor Rp built in the 6th stitch X6, pump passes through pull-up to mouth heater strip
Resistance Rp connection second source.
S204: the resistance that pump arrives mouth heater strip is calculated based on first voltage.
In the specific implementation process, when pressure pipe electric heating relay is in closed state, post-processing heating main relay,
When return pipe electric heating relay and pipette electric heating relay are in open state, obtain corresponding equivalent circuit and
A kind of equivalent circuit structure figure is shown with reference to Fig. 3 in conjunction with the resistance that Ohm's law calculates pump to mouth heater strip, the equivalent electricity
Road includes: second source, pull-up resistor Rp, pipeline heating resistance wire Rx and second resistance R2.
Wherein, second source is connected with one end of pull-up resistor Rp, the other end and pipeline heating resistance of pull-up resistor Rp
One end of silk R x is connected, and the other end of pipeline heating resistance wire Rx is connected with the first end of second resistance R2, second resistance R2's
Second end ground connection.
It should be noted that pipeline heating resistance wire Rx at this time is that pump arrives mouth heater strip, the other end of pull-up resistor Rp
It is connected with one end of pipeline heating resistance wire Rx, i.e., the other end of pull-up resistor Rp is connected with pump to one end of mouth heater strip.
Further, it should be noted that the company that the other end of pull-up resistor Rp is connected with pump to one end of mouth heater strip
Contact is voltage acquisition point, i.e. is voltage acquisition point at the 6th stitch X6 of controller ECU, passes through collection voltages collection point at this time
First voltage can be obtained in the voltage at place.
During specifically executing step S204, as shown in Figure 4, comprising the following steps:
S401: the resistance value of the voltage value of second source, the resistance value of pull-up resistor and second resistance is obtained.
S402: using the resistance value of first voltage, the voltage value of second source, the resistance value of pull-up resistor and second resistance as
The input information of parameter in one preset resistive value calculation formula obtains the resistance that pump arrives mouth heater strip.
Wherein, the first preset resistive value calculation formula is generated based on Ohm's law.
It should be noted that Ohm's law be electric current in same circuit, in conductor with conductor both ends voltage at
Direct ratio, the resistance with conductor are inversely proportional.
In the specific implementation process, by first voltage, the resistance value and second resistance of the voltage value of second source, pull-up resistor
Input information of the resistance value as parameter in the first preset resistive value calculation formula, and the first pre- handicapping generated based on Ohm's law
It is as follows to be worth calculation formula:
Wherein, Rx is the resistance value of pipeline heating resistance wire Rx, i.e. the resistance of pump to mouth heater strip, and V is the electricity of first voltage
Pressure value, u are the voltage value of second source, and Rp is the resistance value of pull-up resistor Rp, and R2 is the resistance value of second resistance R2.
For example, when the voltage value for obtaining second source is 5V, the resistance value of pull-up resistor Rp is 20 Europe and second resistance R2
Resistance value is 10 Europe, and the voltage value of collected first voltage is 3V, the first voltage that will acquire, the first power supply voltage value,
The input information base of the resistance value of pull-up resistor Rp and the resistance value of second resistance R2 as parameter in the first preset resistive value calculation formula
It is as follows in the first preset resistive value calculation formula that Ohm's law generates:
Wherein, Rx is the resistance value of pipeline heating resistance wire Rx, i.e. the resistance of pump to mouth heater strip, to acquire pipeline heating
The resistance value of resistance wire Rx is 20 Europe, i.e., the resistance of pump to mouth heater strip is 20 Europe.
A kind of resistor detection method provided in an embodiment of the present invention adds after monitoring engine start to pressure pipe electricity
Electrothermal relay sends the first close command, post-processing heating main relay and pressure pipe electric heating relay when engine is starting
Device is in open state, then by returning after receiving pressure pipe electric heating relay response the first close command execution closed procedure
The first information is returned, first information characterization pressure pipe electric heating relay is in closed state, acquires the first electricity at the 6th stitch
Pressure, and the resistance value that pump is heated to mouth is calculated based on first voltage.Technical solution provided by the invention, by pressure pipe electric heating
Relay sends the first close command, after receiving pressure pipe electric heating relay response the first close command execution closure behaviour
After the first information of return, the first voltage at the 6th stitch is acquired, and the electricity that pump arrives mouth heater strip is calculated based on first voltage
Resistance can accurately calculate the heating power P that pump arrives mouth heater strip by the actual resistance for calculating pump to mouth heater strip, i.e.,
By precalculating the actual resistance of pipeline heating resistance wire, the heating power of pipeline heating resistance wire can be accurately calculated,
And then guarantee that SCR pipeline thaws completely.
On the basis of present invention resistance electric measuring method disclosed above, as shown in figure 5, the resistance electric measuring method further includes
Following steps:
S501: control pressure pipe electric heating relay is opened.
During specifically executing step S201, after calculating resistance of the pump to mouth heater strip based on first voltage, control
Device ECU processed is controlled and is pumped pressure pipe electric heating relay unlatching corresponding to mouth heater strip.
S502: the second close command is sent to return pipe electric heating relay.
It should be noted that return pipe electric heating relay is in the open state when engine is starting.
During specifically executing step S502, controller ECU is added by the circuit of SCR pipe-line system to return pipe electricity
Electrothermal relay sends the second close command.
It should be noted that the second close command can execute closed procedure for control return pipe electric heating relay, it can
It is set according to practical application, the embodiment of the present invention is not limited.
S503: it receives return pipe electric heating relay and responds the second letter returned after the second close command execution closed procedure
Breath.
It should be noted that the second information representation return pipe electric heating relay is in closed state.
S504: the second voltage at the 6th stitch of acquisition.
During specifically executing step S504, controller ECU is receiving return pipe electric heating relay response second
After the second information returned after instruction execution closed procedure, the second voltage at the 6th stitch X6 is acquired.
It should be noted that second source and pull-up resistor Rp built in the 6th stitch X6, pump passes through pull-up to case heater strip
Resistance Rp connection second source.
S505: the resistance that pump arrives case heater strip is calculated based on second voltage.
In the specific implementation process, when return pipe electric heating relay is in closed state, post-processing heating main relay,
When pressure pipe electric heating relay and pipette electric heating relay are in open state, obtain corresponding equivalent circuit and
A kind of equivalent circuit structure figure is shown with reference to Fig. 3 in conjunction with the resistance that Ohm's law calculates pump to case heater strip, the equivalent electricity
Road includes: second source, pull-up resistor Rp, pipeline heating resistance wire Rx and second resistance R2.
It should be noted that pipeline heating resistance wire Rx at this time is that pump arrives case heater strip, the other end of pull-up resistor Rp
It is connected with one end of pipeline heating resistance wire Rx, i.e., the other end of pull-up resistor Rp is connected with pump to one end of mouth heater strip.
Further, it should be noted that the company that the other end of pull-up resistor Rp is connected with pump to one end of case heater strip
Contact is voltage acquisition point, i.e. is voltage acquisition point at the 6th stitch X6 of controller ECU, passes through collection voltages collection point at this time
Second voltage can be obtained in the voltage at place.
During specifically executing step S505, as shown in Figure 6, comprising the following steps:
S601: the resistance value of the voltage value of second source, the resistance value of pull-up resistor and second resistance is obtained.
S602: using the resistance value of second voltage, the voltage value of second source, the resistance value of pull-up resistor and second resistance as
The input information of parameter in two preset resistive value calculation formula obtains the resistance that pump arrives case heater strip.
Wherein, the second preset resistive value calculation formula is generated based on Ohm's law.
For example, when the voltage value for obtaining second source is 5V, the resistance value of pull-up resistor Rp is 20 Europe and second resistance R2
Resistance value is 10 Europe, and the voltage value of collected second voltage is 4V, the second voltage that will acquire, the first power supply voltage value,
The input information base of the resistance value of pull-up resistor Rp and the resistance value of second resistance R2 as parameter in the second preset resistive value calculation formula
It is as follows in the second preset resistive value calculation formula that Ohm's law generates:
Wherein, Rx is the resistance value of pipeline heating resistance wire Rx, i.e. the resistance of pump to case heater strip, to acquire pipeline heating
The resistance value of resistance wire Rx is 70 Europe, i.e., the resistance of pump to case heater strip is 70 Europe.
In embodiments of the present invention, it is opened by control pressure pipe electric heating relay, and to return pipe electric heating relay
Device sends the second close command, after by receiving return pipe electric heating relay response the second close command execution closed procedure
The second information is returned to, the second information representation return pipe electric heating relay is in closed state, acquires second at the 6th stitch
Voltage, and the resistance value that pump arrives case heater strip is calculated based on second voltage.Technical solution provided by the invention, by electric to return pipe
It heats relay and sends the second close command, execute closure when receiving the second close command of return pipe electric heating relay response
After the second information returned after behaviour, the second voltage at the 6th stitch is acquired, and pump is calculated based on second voltage and arrives case heater strip
Resistance, by calculate pump to case heater strip actual resistance can accurately calculate pump to case heater strip heating power P,
Guarantee that the return pipe of urea pump to urea box thaws completely, and then guarantees that SCR pipeline thaws completely.
On the basis of the present invention each resistor detection method disclosed above, as shown in fig. 7, the resistor detection method is also
The following steps are included:
S701: control return pipe electric heating relay is opened.
During specifically executing step S701, after calculating resistance of the pump to case heater strip based on second voltage, control
Device ECU processed is controlled and is pumped return pipe electric heating relay unlatching corresponding to case heater strip.
S702: third close command is sent to pipette electric heating relay.
During specifically executing step S702, controller ECU is by the circuit of SCR pipe-line system to return pipe motor
Electrothermal relay sends third close command.
It should be noted that third close command can execute closed procedure for control pipette electric heating relay, it can
It is set according to practical application, the embodiment of the present invention is not limited.
S703: it receives pipette electric heating relay response third close command and executes the third letter returned after closed procedure
Breath.
It should be noted that third information representation pipette electric heating relay is in closed state.
S704: the tertiary voltage at the 6th stitch of acquisition.
During specifically executing step S703, controller ECU is receiving pipette electric heating relay response third
After the third information returned after instruction execution closed procedure, the tertiary voltage at the 6th stitch X6 is acquired.
It should be noted that second source and pull-up resistor Rp built in the 6th stitch X6, case passes through pull-up to pump heater strip
Resistance Rp connection second source.
S705: case is calculated to the resistance for pumping heater strip based on tertiary voltage.
In the specific implementation process, when pipette electric heating relay is in closed state, post-processing heating main relay,
When return pipe electric heating relay and pressure pipe electric heating relay are in open state, obtain corresponding equivalent circuit and
A kind of equivalent circuit structure figure is shown with reference to Fig. 3 in conjunction with the resistance that Ohm's law calculates case to pump heater strip, the equivalent electricity
Road includes: second source, pull-up resistor Rp, pipeline heating resistance wire Rx and second resistance R2.
It should be noted that pipeline heating resistance wire Rx at this time is case to pump heater strip, the other end of pull-up resistor Rp
It is connected with one end of pipeline heating resistance wire Rx, i.e., the other end of pull-up resistor Rp is connected with one end of case to pump heater strip.
Further, it should be noted that the other end of pull-up resistor Rp and the other end of pull-up resistor Rp and case to pump
The connected tie point in one end of heater strip is voltage acquisition point, i.e. is voltage acquisition point at the 6th stitch X6 of controller ECU, this
When tertiary voltage can be obtained by the voltage at collection voltages collection point.
During specifically executing step S705, as shown in Figure 8, comprising the following steps:
S801: the resistance value of the voltage value of second source, the resistance value of pull-up resistor and second resistance is obtained.
S802: using the resistance value of tertiary voltage, the voltage value of second source, the resistance value of pull-up resistor and second resistance as
The input information of parameter in three preset resistive value calculation formula obtains case to the resistance for pumping heater strip.
Wherein, third preset resistive value calculation formula is generated based on Ohm's law.
For example, when the voltage value for obtaining second source is 5V, the resistance value of pull-up resistor Rp is 20 Europe and second resistance R2
Resistance value is 10 Europe, and the voltage value of collected second voltage is 2.5V, the voltage of the tertiary voltage, second source that will acquire
Input information of the resistance value of value, the resistance value of pull-up resistor Rp and second resistance R2 as parameter in third preset resistive value calculation formula
The the second preset resistive value calculation formula generated based on Ohm's law is as follows:
Wherein, Rx is the resistance value of pipeline heating resistance wire Rx, i.e. the resistance of case to pump heater strip, to acquire pipeline heating
The resistance value of resistance wire Rx is 10 Europe, i.e. the resistance of case to pump heater strip is 10 Europe.
In embodiments of the present invention, it is opened by control return pipe electric heating relay, and to pipette electric heating relay
Device send third close command, then by receive pipette electric heating relay respond third close command execute closed procedure after
Third information is returned to, third information representation pipette electric heating relay is in closed state, acquires the third at the 6th stitch
Voltage, and case is calculated to the resistance value for pumping heater strip based on tertiary voltage.Technical solution provided by the invention, by electric to pipette
It heats relay and sends third close command, execute closure when receiving pipette electric heating relay response third close command
After the third information returned after behaviour, the tertiary voltage at the 6th stitch is acquired, and pump is calculated based on tertiary voltage and arrives case heater strip
Resistance, by calculate outlet to pump heater strip actual resistance can accurately calculate outlet to pump heater strip heating power P,
I.e. by precalculating the actual resistance of pipeline heating resistance wire, the heating function of pipeline heating resistance wire can be accurately calculated
Rate, and then guarantee that SCR pipeline thaws completely.
The embodiment of the present invention corresponding with a kind of resistor detection method disclosed in the embodiments of the present invention provides a kind of electricity
Electric probe device is hindered, which is that the controller ECU and the circuit of SCR pipe-line system based on above-mentioned offer are connected come real
Existing.
As shown in figure 9, a kind of structural schematic diagram of resistor detecting device provided in an embodiment of the present invention, the device 900 packet
It includes:
First close command transmission unit 901, for after monitoring engine start, to pressure pipe motor electrothermal relay
Send the first close command；When engine is inactive, post-processing heating main relay and pressure pipe electric heating relay are in
Open state.
First receiving unit 902 responds the first close command execution closure behaviour for receiving pressure pipe electric heating relay
The ground first information is returned to after work, first information characterization pressure pipe electric heating relay is in closed state.
First acquisition unit 903, for acquiring the first voltage at the 6th stitch.
First computing unit 904, for calculating the resistance that pump arrives mouth heater strip based on first voltage.
The specific principle of each unit and implementation procedure in resistor detecting device disclosed in the embodiments of the present invention, and it is upper
It is identical to state resistor detection method disclosed by the embodiments of the present invention, reference can be made to resistor detection method disclosed in the embodiments of the present invention
In corresponding part, be not discussed here.
A kind of resistor detecting device provided in an embodiment of the present invention is monitoring to send out by the first close command transmission unit
After motivation starting, the first close command is sent to pressure pipe electric heating relay, the post-processing heating master when engine is starting
Relay and pressure pipe electric heating relay are in open state, receive pressure pipe electric heating relay by the first receiving unit
Device responds after the first close command executes closed procedure and returns to the first information, and the first information characterizes at pressure pipe electric heating relay
In closed state, the first voltage at the 6th stitch is acquired by the first acquisition unit, and is based on the by the first computing unit
One voltage calculates pump to the resistance value of mouth heating.Technical solution provided by the invention, by being sent to pressure pipe electric heating relay
First close command responds first returned after the first close command executes closure behaviour when receiving pressure pipe electric heating relay
After information, the first voltage at the 6th stitch is acquired, and the resistance that pump arrives mouth heater strip is calculated based on first voltage, pass through calculating
The actual resistance pumped out to mouth heater strip can accurately calculate pump to the heating power P of mouth heater strip, that is, pass through and count in advance
The actual resistance for calculating pipeline heating resistance wire can accurately calculate the heating power of pipeline heating resistance wire, and then guarantee SCR
Pipeline thaws completely.
Preferably, a kind of resistor detecting device, further includes:
First control unit 905 is opened for controlling pressure pipe electric heating relay.
Second close command transmission unit 906 is being sent out for sending the second close command to return pipe electric heating relay
Return pipe electric heating relay is in the open state when motivation is inactive.
Second receiving unit 907 responds the second close command execution closure behaviour for receiving return pipe electric heating relay
The second information returned after work, the second information representation return pipe electric heating relay are in closed state.
Second acquisition unit 908, for acquiring the second voltage at the 6th stitch.
Second computing unit 909, for calculating the resistance that pump arrives case heater strip based on second voltage.
In embodiments of the present invention, pressure pipe electric heating relay is controlled by first control unit to open, pass through second
Close command transmission unit sends the second close command to return pipe electric heating relay, then is received back by the second receiving unit
Flow tube electric heating relay responds after the second close command executes closed procedure and returns to the second information, the second information representation return pipe
Electric heating relay is in closed state, acquires the second voltage at the 6th stitch by the second acquisition unit, and pass through second
Computing unit calculates the resistance value that pump arrives case heater strip based on second voltage.Technical solution provided by the invention, by return pipe
Electric heating relay sends the second close command, closes when receiving response the second close command execution of return pipe electric heating relay
After closing the second information returned after behaviour, the second voltage at the 6th stitch is acquired, and pump is calculated based on second voltage and is heated to case
The resistance of silk can accurately calculate the heating power that pump arrives case heater strip by the actual resistance for calculating pump to case heater strip
P can accurately calculate the heating function of pipeline heating resistance wire that is, by precalculating the actual resistance of pipeline heating resistance wire
Rate, and then guarantee that SCR pipeline thaws completely.
Preferably, a kind of resistor detecting device, further includes:
Second control unit 9010 is opened for controlling pipette electric heating relay.
Third close command transmission unit 9011, for sending third close command to pipette electric heating relay,
Pipette electric heating relay is in the open state when engine is inactive.
Third receiving unit 9012 executes closure behaviour for receiving pipette electric heating relay response third close command
The third information returned after work, third information representation pipette electric heating relay are in closed state；
Third acquisition unit 9013, for acquiring the tertiary voltage at the 6th stitch.
Third computing unit 9014, the resistance for calculating case to pump heater strip based on tertiary voltage.
In embodiments of the present invention, return pipe electric heating relay is controlled by the second control unit to open, pass through third
Close command transmission unit sends third close command to pipette electric heating relay, then is received and inhaled by third receiving unit
Liquid pipe electric heating relay responds after third close command executes closed procedure and returns to third information, third information representation pipette
Electric heating relay is in closed state, acquires the tertiary voltage at the 6th stitch by third acquisition unit, and pass through third
Computing unit calculates case to the resistance value for pumping heater strip based on tertiary voltage.Technical solution provided by the invention, by pipette
Electric heating relay sends third close command, closes when receiving the response third close command execution of pipette electric heating relay
After closing the third information returned after behaviour, the tertiary voltage at the 6th stitch is acquired, and pump is calculated based on tertiary voltage and is heated to case
The resistance of silk can accurately calculate outlet to the heating power for pumping heater strip by the actual resistance for calculating outlet to pump heater strip
P can accurately calculate the heating function of pipeline heating resistance wire that is, by precalculating the actual resistance of pipeline heating resistance wire
Rate, and then guarantee that SCR pipeline thaws completely.
Preferably, the first computing unit 904, comprising:
First acquisition unit, for obtaining voltage value, the resistance value of pull-up resistor and the resistance value of second resistance of second source.
The resistance calculations unit that pumps mouth heater strip, for by the voltage value of first voltage, second source, pull-up resistor
Input information of the resistance value of resistance value and second resistance as parameter in the first preset resistive value calculation formula obtains pump to mouth heater strip
Resistance；Wherein, the first preset resistive value calculation formula is generated based on Ohm's law.
Preferably, the second computing unit 909, comprising:
Second acquisition unit, for obtaining voltage value, the resistance value of pull-up resistor and the resistance value of second resistance of second source.
The resistance calculations unit that pumps case heater strip, for by the voltage value of second voltage, second source, pull-up resistor
Input information of the resistance value of resistance value and second resistance as parameter in the second preset resistive value calculation formula obtains pump to case heater strip
Resistance；Wherein, the second preset resistive value calculation formula is generated based on Ohm's law.
Preferably, third computing unit 9014, comprising:
Third acquiring unit, for obtaining voltage value, the resistance value of pull-up resistor and the resistance value of second resistance of second source.
The resistance calculations unit that pumps case heater strip, for by the voltage value of tertiary voltage, second source, pull-up resistor
Input information of the resistance value of resistance value and second resistance as parameter in third preset resistive value calculation formula obtains case to pump heater strip
Resistance；Wherein, third preset resistive value calculation formula is generated based on Ohm's law.
All the embodiments in this specification are described in a progressive manner, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for system or
For system embodiment, since it is substantially similar to the method embodiment, so describing fairly simple, related place is referring to method
The part of embodiment illustrates.System and system embodiment described above is only schematical, wherein the conduct
The unit of separate part description may or may not be physically separated, component shown as a unit can be or
Person may not be physical unit, it can and it is in one place, or may be distributed over multiple network units.It can root
According to actual need that some or all of the modules therein is selected to achieve the purpose of the solution of this embodiment.Ordinary skill
Personnel can understand and implement without creative efforts.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure
And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These
Function is implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think beyond scope of the present application.
The foregoing description of the disclosed embodiments makes professional and technical personnel in the field can be realized or use the application.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the application.Therefore, the application
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
The above is only the preferred embodiment of the application, it is noted that for the ordinary skill people of the art
For member, under the premise of not departing from the application principle, several improvements and modifications can also be made, these improvements and modifications are also answered
It is considered as the protection scope of the application.
Claims (10)
1. a kind of resistor detection method, which is characterized in that be applied to controller, controller is connected with the circuit of SCR pipe-line system；
The circuit includes post-processing heating main relay, first resistor, pressure pipe electric heating relay, pump to mouth heater strip and second
Resistance；The first stitch and the second stitch of the controller heat the both ends phase of main relay coil with the post-processing respectively
Even, the one end switched in the post-processing heating main relay is connected by the first resistor with the first power supply, is located after described
The other end switched in reason heating main relay is connected with the 6th stitch of the controller；First stitch of the controller and
Third stitch is connected with the both ends of the pressure pipe electric heating relay coil respectively；In the pressure pipe electric heating relay
One end of switch is connected to mouth heater strip with the 6th stitch by the pump, is switched in the pressure pipe electric heating relay
The other end be grounded by the second resistance, this method comprises:
After monitoring engine start, Xiang Suoshu pressure pipe electric heating relay sends the first close command；Start described
The post-processing heating main relay and the pressure pipe electric heating relay are in open state when machine is inactive；
It receives the pressure pipe electric heating relay and responds the first letter returned after the first close command execution closed procedure
Breath, the first information characterize the pressure pipe electric heating relay and are in closed state；
Acquire the first voltage at the 6th stitch；
The resistance that the pump arrives mouth heater strip is calculated based on the first voltage.
2. the method according to claim 1, wherein the circuit further includes return pipe electric heating relay and pump
To case heater strip；The first stitch and the 4th stitch of the controller respectively with the return pipe electric heating relay coil
Both ends are connected, and the one end switched in the return pipe electric heating relay passes through the pump to case heater strip and the 6th stitch
It is connected, the other end switched in the return pipe electric heating relay is grounded by the second resistance, this method further include:
The pressure pipe electric heating relay is controlled to open；
The second close command is sent to the return pipe electric heating relay, the return pipe electricity when the engine is inactive
It is in the open state to heat relay；
It receives the return pipe electric heating relay and responds the second letter returned after the second close command execution closed procedure
It ceases, return pipe electric heating relay described in second information representation is in closed state；
Acquire the second voltage at the 6th stitch；
The resistance that the pump arrives case heater strip is calculated based on the second voltage.
3. the method according to claim 1, wherein the circuit further includes pipette electric heating relay and case
To pump heater strip；The first stitch and the 5th stitch of the controller respectively with the pipette electric heating relay coil
Both ends are connected, and the one end switched in the pipette electric heating relay passes through the case to pump heater strip and the 6th stitch
It is connected, the other end switched in the pipette electric heating relay is grounded by the second resistance, this method further include:
The return pipe electric heating relay is controlled to open；
Third close command is sent to the pipette electric heating relay, the pipette electricity when the engine is inactive
It is in the open state to heat relay；
It receives the pipette electric heating relay and responds the third letter returned after the third close command execution closed procedure
It ceases, pipette electric heating relay described in the third information representation is in closed state；
Acquire the tertiary voltage at the 6th stitch；
The case is calculated to the resistance for pumping heater strip based on the tertiary voltage.
4. according to the method described in claim 3, it is characterized in that, second source and pull-up resistor built in the 6th stitch,
The pump passes through described in the pull-up resistor connects to mouth heater strip, the pump to case heater strip and the case to heater strip is pumped
Second source；
It is described that the resistance that the pump arrives mouth heater strip is calculated based on the first voltage, comprising:
Obtain the resistance value of the voltage value of the second source, the resistance value of the pull-up resistor and the second resistance；
By the first voltage, the resistance of the voltage value of the second source, the resistance value of the pull-up resistor and the second resistance
It is worth the input information as parameter in the first preset resistive value calculation formula, obtains the resistance that the pump arrives mouth heater strip；Wherein, institute
The first preset resistive value calculation formula is stated to generate based on Ohm's law.
5. according to the method described in claim 4, it is characterized in that, described added based on the second voltage calculating pump to case
The resistance of heated filament, comprising:
Obtain the resistance value of the voltage value of the second source, the resistance value of the pull-up resistor and the second resistance；
By the second voltage, the resistance of the voltage value of the second source, the resistance value of the pull-up resistor and the second resistance
It is worth the input information as parameter in the second preset resistive value calculation formula, obtains the resistance that the pump arrives case heater strip；Wherein, institute
The second preset resistive value calculation formula is stated to generate based on Ohm's law.
6. according to the method described in claim 5, it is characterized in that, described added based on the tertiary voltage calculating case to pump
The resistance of heated filament, comprising:
Obtain the resistance value of the voltage value of the second source, the resistance value of the pull-up resistor and the second resistance；
By the resistance of the tertiary voltage, the voltage value of the second source, the resistance value of the pull-up resistor and the second resistance
It is worth the input information as parameter in third preset resistive value calculation formula, obtains the case to the resistance for pumping heater strip；Wherein, institute
Third preset resistive value calculation formula is stated to generate based on Ohm's law.
7. a kind of resistor detecting device, which is characterized in that be applied to controller, the circuit of the controller and SCR management system
It is connected；The circuit includes post-processing heating main relay, first resistor, pressure pipe electric heating relay, pump to mouth heater strip
And second resistance；The first stitch and the second stitch of the controller respectively at the post-processing heating main relay coil and
Both ends are connected, and the one end switched in the post-processing heating main relay is connected by the first resistor with the first power supply, institute
The other end switched in post-processing heating main relay is stated to be connected with the 6th stitch of the controller；The first of the controller
Stitch is connected with third stitch respectively at the both ends of the pressure pipe electric heating relay coil；The pressure pipe electric heating after
The one end switched in electric appliance is connected to mouth heater strip with the 6th stitch by the pump, the pressure pipe motor electrothermal relay
The other end of middle switch is grounded by the second resistance, which includes:
First close command transmission unit, for after monitoring engine start, Xiang Suoshu pressure pipe motor electrothermal relay to be sent out
Send the first close command；When the engine is inactive post-processing heating main relay and the pressure pipe electric heating after
Electric appliance is in open state；
First receiving unit responds the first close command execution closure behaviour for receiving the pressure pipe electric heating relay
The ground first information is returned to after work, the first information characterizes the pressure pipe electric heating relay and is in closed state；
First acquisition unit, for acquiring the first voltage at the 6th stitch；
First computing unit, for calculating the resistance that the pump arrives mouth heater strip based on the first voltage.
8. device according to claim 7, which is characterized in that the circuit further includes return pipe electric heating relay and pump
To case heater strip；The first stitch and the 4th stitch of the controller are respectively at the return pipe electric heating relay coil
Both ends are connected, and the one end switched in the return pipe electric heating relay passes through the pump to case heater strip and the 6th stitch
It is connected, the other end switched in the return pipe electric heating relay is grounded by the second resistance, described device further include:
First control unit is opened for controlling the pressure pipe electric heating relay；
Second close command transmission unit, for sending the second close command to the return pipe electric heating relay, described
The return pipe electric heating relay is in the open state when engine is inactive；
Second receiving unit responds the second close command execution closure behaviour for receiving the return pipe electric heating relay
The second information returned after work, return pipe electric heating relay described in second information representation are in closed state；
Second acquisition unit, for acquiring the second voltage at the 6th stitch；
Second computing unit, for calculating the resistance that the pump arrives case heater strip based on the second voltage.
9. device according to claim 7, which is characterized in that the circuit further includes pipette electric heating relay and case
To pump heater strip；The first stitch and the 5th stitch of the controller respectively with the pipette electric heating relay coil
Both ends are connected, and the one end switched in the pipette electric heating relay passes through the case to pump heater strip and the 6th stitch
It is connected, the other end switched in the pipette electric heating relay is grounded by the second resistance, the device further include:
Second control unit is opened for controlling the pipette electric heating relay；
Third close command transmission unit, for sending third close command to the pipette electric heating relay, described
The pipette electric heating relay is in the open state when engine is inactive；
Third receiving unit responds the third close command execution closure behaviour for receiving the pipette electric heating relay
The third information returned after work, pipette electric heating relay described in the third information representation are in closed state；
Third acquisition unit, for acquiring the tertiary voltage at the 6th stitch；
Third computing unit, the resistance for calculating the case to pump heater strip based on the tertiary voltage.
10. device according to claim 9, which is characterized in that second source and pull-up resistor built in the 6th stitch,
Coil in the pressure pipe electric heating relay, the return pipe electric heating relay and the pipette electric heating relay
The second source is connected by the pull-up resistor；
First computing unit, comprising:
First acquisition unit, for obtain the voltage value of the second source, the pull-up resistor resistance value and second electricity
The resistance value of resistance；
The resistance calculations unit for pumping mouth heater strip, for by the voltage value of the first voltage, the second source, described
Input information of the resistance value of the resistance value of pull-up resistor and the second resistance as parameter in the first preset resistive value calculation formula, obtains
The pump arrives the resistance of mouth heater strip；Wherein, the first preset resistive value calculation formula is generated based on Ohm's law.
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| CN113804967A (en) * | 2020-06-15 | 2021-12-17 | 卓品智能科技无锡有限公司 | Method for measuring heating resistance of sensor |
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