CN106226694A - A kind of inlet air heating relay fault diagnosis circuit, method for diagnosing faults and system - Google Patents
A kind of inlet air heating relay fault diagnosis circuit, method for diagnosing faults and system Download PDFInfo
- Publication number
- CN106226694A CN106226694A CN201610769803.2A CN201610769803A CN106226694A CN 106226694 A CN106226694 A CN 106226694A CN 201610769803 A CN201610769803 A CN 201610769803A CN 106226694 A CN106226694 A CN 106226694A
- Authority
- CN
- China
- Prior art keywords
- inlet air
- air heating
- voltage
- point
- common port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention discloses a kind of inlet air heating relay fault diagnosis circuit, method for diagnosing faults and system, the present invention is by the way of electronic control unit ECU gathers inlet air heating grid high side voltage, accurately judge relay whether adhesion, on the stitch T15 of electronic control unit ECU, whether electro-detection inlet air heating relay output state is 0, if 0, then detection inlet air heating grid high side voltage, judges whether inlet air heating relay sticks together when powering on；If inlet air heating relay output state is 1, then after it terminates heating, detection inlet air heating grid high side voltage, judge after heating, whether inlet air heating relay sticks together, this invention both can detect the inlet air heating relay adhesion state when T15 powers on, and can detect again inlet air heating relay after heating, if stick together.
Description
Technical field
The present invention relates to technical field of engine control, in particular, relate to a kind of inlet air heating relay fault
Diagnostic circuit, method for diagnosing faults and system.
Background technology
Before the normal startup of automobile engine, the air being required in electromotor input heats, and its objective is
In order to improve the low-temperature startup performance of electronic controlled diesel or gasoline engine, prevent from causing gaseous mixture not burn because intake air temperature is too low
Or the generation of the situation such as " over-emitting black exhaust ".
In order to realize the inlet air heating to electromotor, mostly use ECU (Electronic Control Unit, electronics control
Unit processed) control the opening and closing of inlet air heating relay control inlet air heating grid in pipeline for electrical heating, at inlet air heating
During relay Guan Bi, accumulator is powered to inlet air heating grid and is heated；When inlet air heating relay disconnects, accumulator is stopped
Only it is powered to inlet air heating grid.But when actually used, due to the physical cause of inlet air heating relay contacts part,
There may be inlet air heating relay close for a long time can not normally open situation, i.e. adhesion (refers to two copper of relay
Sheet fits together and causes inlet air heating relay to be constantly in conducting state, not by ECU control), thus cause intake air temperature
Drastically raise, make inlet air heating grid be in big current work state for a long time, and then cause inlet air heating grid wires circuit
Burn, vehicle fire time serious, may be caused, threaten the personal safety of driver, therefore, to judging that inlet air heating relay is
No adhesion is very important.
In the prior art, it is by preheating to enter during post-heating respectively for inlet air heating relay adhesion
Row gathers what battery tension carried out judging, if front and back the deviation of voltage is less than predetermined threshold value, the most normally disconnects；If voltage front and back
Deviation is more than predetermined threshold value, then show that adhesion, this determination methods can realize the adhesion state judged when ECU powers on.But
It is, for reality, when accumulator battery electric quantity abundance and during post-heating, owing to electromotor has begun to work
Making, the battery tension of monitoring is the most unstable, and the difference of front and back voltage is likely to be less than the predetermined threshold value demarcated, and i.e. cannot sentence
Cracked ends crosses the whether adhesion of the inlet air heating relay after heating.
Summary of the invention
In view of this, the invention provides a kind of inlet air heating relay fault diagnosis circuit, method for diagnosing faults and be
System, to solve to use in prior art the cell voltage before and after being heated by collection to carry out relatively sentencing of deviation and predetermined threshold value
The whether adhesion of disconnected relay, owing to during post-heating, cell voltage is unstable, the problem causing determining whether adhesion.
For achieving the above object, the present invention provides following technical scheme:
A kind of inlet air heating relay fault diagnosis circuit, including: electronic control unit ECU, inlet air heating relay with
And inlet air heating grid, wherein:
The input circuit of first stitch of described electronic control unit ECU and the second stitch and described inlet air heating relay
Being connected, the described input circuit that described first stitch is described inlet air heating relay provides high side voltage, described second stitch
Whether the described input circuit controlling described inlet air heating relay turns on；
Described inlet air heating relay output loop the first end be connected with the positive pole of accumulator, the second end with described enter
First end of gas heater grid is connected；
Second end ground connection of described inlet air heating grid；
The common port A point of described inlet air heating relay and described inlet air heating grid and described electronic control unit ECU
The 3rd stitch be connected, described 3rd stitch is the analog acquisition passage of described electronic control unit ECU.
A kind of inlet air heating relay method for diagnosing faults, is applied to inlet air heating relay fault diagnosis circuit, described
Inlet air heating relay fault diagnosis circuit includes: electronic control unit ECU, inlet air heating relay and inlet air heating lattice
Grid, the method includes:
Whether S1, the output state monitoring described electronic control unit ECU the second stitch are 0, if it is not, then enter S2,
If it is, described electronic control unit ECU the 3rd stitch monitors the voltage of described common port A point, enter S5；
S2, monitoring current ambient environmental temperature, when ambient temperature reaches preset temperature, monitor described inlet air heating
Can grid normally work；
S3, when described inlet air heating grid be normal operating conditions, and heat time heating time arrive preset heat time heating time (described pre-
If heat time heating time is more than 5s) time, it is 0 that described electronic control unit ECU controls the second stitch output state, disconnects described air inlet and adds
Thermorelay；
After S4, delay predetermined time delay, described electronic control unit ECU the 3rd stitch monitors described common port A point
Voltage；
Whether S5, the voltage judging described common port A point are high level；
S6, when the voltage of described common port A point is more than 4.5V, and the voltage of the most described common port A point is high level, then described in
Inlet air heating relay sticks together.
Preferably, can described monitoring described inlet air heating grid normally work, including:
S21, control described inlet air heating relay conducting, described electronic control unit ECU the 3rd stitch monitor described public affairs
Hold the voltage of A point altogether；
Whether S22, the voltage judging described common port A point are high level；
S23, when the voltage of described common port A point is less than 0.5V, and the voltage of the most described common port A point is low level, then institute
State inlet air heating relay and be in open-circuit condition, report described inlet air heating relay open fault；
S24, when monitor described common port A point voltage be more than 4.5V, the voltage of the most described common port A point is high level,
The most described inlet air heating grid normally works.
Preferably, the method also includes:
S7, when monitoring described inlet air heating relay and sticking together, controlled by the control mode of repeatedly open and close
The contact of described inlet air heating relay flicks；
After S8, delay predetermined time delay, described electronic control unit ECU the 3rd stitch monitors described common port A point
Voltage；
Whether S9, the voltage judging described common port A point are high level；
S10, when the voltage of described common port A point is less than 0.5V, and the voltage of the most described common port A point is low level, then institute
State inlet air heating relay not stick together；
S11, when the voltage of described common port A point is more than 4.5V, and the voltage of the most described common port A point is high level, then institute
State inlet air heating relay to stick together, report described inlet air heating relay adhesion fault.
Wherein, described predetermined time delay is 500ms.
A kind of inlet air heating relay fault diagnosis system, including:
First monitoring means, for monitoring the output state of described electronic control unit ECU the second stitch；
Second monitoring means, is used for monitoring current ambient environmental temperature, when ambient temperature reaches preset temperature, and prison
Survey described inlet air heating grid can normally work；
Switching units, is used for when described inlet air heating grid is normal operating conditions, and arrives default heating heat time heating time
During the time, it is 0 that described electronic control unit ECU controls the second stitch output state, disconnects described inlet air heating relay；
3rd monitoring means, after being used for postponing predetermined time delay, described electronic control unit ECU the 3rd stitch monitors institute
State the voltage of common port A point；
Whether the first judging unit, be high level for judging the voltage of described common port A point, when described common port A point
Voltage less than 0.5V, the voltage of the most described common port A point is low level, and the most described inlet air heating relay does not sticks together,
When the voltage of described common port A point is more than 4.5V, and the voltage of the most described common port A point is high level, and the most described inlet air heating continues
Electrical equipment sticks together.
Preferably, described second monitoring means includes:
Monitoring subelement, is used for controlling the conducting of described inlet air heating relay, described electronic control unit ECU the 3rd stitch
Monitor the voltage of described common port A point；
Whether the second judging unit, be high level for judging the voltage of described common port A point, when described common port A point
Voltage less than 0.5V, the voltage of the most described common port A point is low level, and the most described inlet air heating relay is in open circuit shape
State, reports described inlet air heating relay open fault, when the voltage monitoring described common port A point is more than 4.5V, the most described public
The voltage of end A point is high level, and the most described inlet air heating grid normally works.
Preferably, this system also includes:
Control contact and flick unit, for when monitoring described inlet air heating relay and sticking together, by repeatedly opening
The control mode closed controls the contact of described inlet air heating relay and flicks；
4th monitoring means, after being used for postponing predetermined time delay, described electronic control unit ECU the 3rd stitch monitors institute
State the voltage of common port A point；
Whether the 3rd judging unit, be high level for judging the voltage of described common port A point, when described common port A point
Voltage less than 0.5V, the voltage of the most described common port A point is low level, and the most described inlet air heating relay does not sticks together,
When the voltage of described common port A point is more than 4.5V, and the voltage of the most described common port A point is high level, and the most described inlet air heating continues
Electrical equipment sticks together, and reports described inlet air heating relay adhesion fault.
Understand via above-mentioned technical scheme, compared with prior art, the invention discloses a kind of inlet air heating relay
Fault diagnosis circuit, method for diagnosing faults and system, the present invention gathers inlet air heating grid flash by electronic control unit ECU
The mode of voltage, accurately judges relay whether adhesion, and on the stitch T15 of electronic control unit ECU, electro-detection inlet air heating continues
Whether electrical equipment output state is 0, if 0, then detection inlet air heating grid high side voltage, judges that inlet air heating relay is upper
Whether stick together during electricity；If inlet air heating relay output state is 1, then after it terminates heating, detect inlet air heating lattice
Grid high side voltage, judges whether inlet air heating relay sticks together, and this invention both can detect air inlet and add after heating
The thermorelay adhesion state when T15 powers on, can detect again inlet air heating relay after heating, if occur viscous
Even.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to
The accompanying drawing provided obtains other accompanying drawing.
A kind of inlet air heating relay fault diagnosis circuit figure that Fig. 1 provides for the embodiment of the present invention；
The schematic flow sheet of a kind of inlet air heating relay method for diagnosing faults that Fig. 2 provides for the embodiment of the present invention；
The flow chart of steps that can the monitoring inlet air heating grid that Fig. 3 provides for the embodiment of the present invention normally work；
The further flow chart of a kind of inlet air heating relay method for diagnosing faults that Fig. 4 provides for the embodiment of the present invention；
A kind of inlet air heating relay fault diagnosis system structural representation that Fig. 5 provides for the embodiment of the present invention；
Fig. 6 is the structural representation of the second monitoring means in the embodiment of the present invention；
A kind of inlet air heating further structural representation of relay fault diagnosis system that Fig. 7 provides for the embodiment of the present invention
Figure.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
Refer to accompanying drawing 1, a kind of inlet air heating relay fault diagnosis circuit figure that Fig. 1 provides for the embodiment of the present invention.
As it is shown in figure 1, the embodiment of the invention discloses a kind of inlet air heating relay fault diagnosis circuit, this circuit includes: electronics control
Unit ECU1 processed, inlet air heating relay 2 and inlet air heating grid 3, wherein: the first stitch X1 of electronic control unit ECU1
Being connected with the input circuit of inlet air heating relay 2 with the second stitch X2, the first stitch X1 is the input of inlet air heating relay 2
Loop provides high side voltage, the second stitch X2 to control whether the input circuit of inlet air heating relay 2 turns on；Inlet air heating relay
Output loop first end of device 2 is connected with the positive pole of accumulator, and the second end is connected with the first end of inlet air heating grid 3；Air inlet
Second end ground connection of heater grid 3；The common port A point of inlet air heating relay 2 and inlet air heating grid 3 and electronic control unit
The 3rd stitch X3 of ECU1 is connected, and the 3rd stitch X3 is the analog acquisition passage of electronic control unit ECU1.
It should be noted that in the present embodiment, the X1 stitch of ECU provides flash for inlet air heating relay input circuit
Voltage, X2 stitch controls whether inlet air heating relay input circuit turns on.If X2 stitch output state is 1, inlet air heating continues
Electrical equipment input circuit turns on, then its output loop simultaneously turns on, and now inlet air heating grid turns on battery positive voltage, adds
Heat.If X2 stitch output state is 0, inlet air heating relay input circuit is not turned on, and inlet air heating grid does not heats.Right
In the analog acquisition passage that X3 stitch is ECU, when inlet air heating grid works, A point turns on battery positive voltage, i.e. voltage
For accumulator positive pole tension, X3 stitch collects high voltage (more than 4.5V)；If inlet air heating grid does not works, A point voltage
Low-voltage is gathered less than 0.5V, X3 stitch.By such Voltage Feedback mode, ECU can accurately judge inlet air heating grid
Whether it is in heated condition.
Concrete, the work process of the circuit disclosed in the present embodiment is:
When the situations such as inlet air heating relay need not, be soaked with rain for a long time occur, may result in inlet air heating
Relay sticks together, and needs after the stitch T15 of ECU powers on, whether sticks together inlet air heating relay and detect.
If T15 powers on, X2 stitch output state is 0, then explanation inlet air heating relay heats, now, and X3 stitch monitoring A point
Voltage, if A point voltage is more than 4.5V, illustrates that inlet air heating relay sticks together；If A point voltage is less than 0.5V, relay is described
Device does not sticks together.Heat time heating time is less than 5s, and inlet air heating grid without heats, sets inlet air heating relay work to air inlet
The time of work can not be less than 5s.
(current environmental temperature, when current environmental temperature reaches preset temperature), inlet air heating under reaching certain condition
Relay closes, X3 stitch monitoring A point voltage, if A point voltage is less than 0.5V, illustrates that inlet air heating grid is in open-circuit condition,
Cannot be carried out normal heating, report inlet air heating relay open fault.If monitoring A point voltage is more than 4.5V, inlet air heating grid
Enter normal heating phases.
After heating terminates, inlet air heating relay disconnects, X2 stitch output 0, then after predetermined time delay 500ms
(after 500ms, inlet air heating relay can reach stable operation duty), X3 stitch gathers A point voltage, if inlet air heating
Relay does not sticks together, and A point voltage collects low-voltage less than 0.5V, X3 stitch, and trouble lamp is not reported to the police；If air inlet adds
Thermorelay sticks together, and its output loop turns on, and inlet air heating grid is in heated condition, and A point voltage is more than 4.5V, X3 pin
Foot gathers high voltage, opens, by 5 100ms, the control mode that 100ms closes, makes inlet air heating relay constantly open pass
Close concussion, relay contact is flicked, then after predetermined time delay 500ms, X3 gathers A point voltage again, if A point voltage
Collect low-voltage less than 0.5V, X3 stitch, then inlet air heating relay adhesion contact flicks, and trouble light is not reported to the police；If A point is electric
Pressure gathers high voltage more than 4.5V, X3 stitch, and inlet air heating relay adhesion contact does not flicks, and trouble light is reported to the police.
The invention discloses a kind of inlet air heating relay fault diagnosis circuit, the present invention passes through electronic control unit ECU
Gather the mode of inlet air heating grid high side voltage, accurately judge relay whether adhesion, the stitch of electronic control unit EDU
Whether T15 upper electro-detection inlet air heating relay output state is 0, if 0, then detection inlet air heating grid high side voltage, comes
Judge whether inlet air heating relay sticks together when powering on；If inlet air heating relay output state is 1, then terminate at it
After heating, detect inlet air heating grid high side voltage, judge whether inlet air heating relay sticks together after heating,
This invention both can detect the inlet air heating relay adhesion state when T15 powers on, and can detect again inlet air heating relay
After heating, if stick together.
Refer to accompanying drawing 2, a kind of inlet air heating relay method for diagnosing faults flow process that Fig. 2 provides for the embodiment of the present invention
Schematic diagram.As in figure 2 it is shown, the invention discloses a kind of inlet air heating relay method for diagnosing faults, the method is applied to air inlet
Adding thermorelay fault diagnosis circuit, inlet air heating relay fault diagnosis circuit includes: electronic control unit ECU, air inlet add
Thermorelay and inlet air heating grid, the method specifically includes following steps:
Whether S1, the output state of monitoring electronic control unit ECU the second stitch are 0, if it is not, then enter S2, if
It is that then the voltage of electronic control unit ECU the 3rd stitch monitoring common port A point, enters S5.
S2, monitoring current ambient environmental temperature, when ambient temperature reaches preset temperature, monitor inlet air heating grid
Can normally work.
Wherein, can monitoring inlet air heating grid normally work, and refers to accompanying drawing 3, and Fig. 3 provides for the embodiment of the present invention
The flow chart of steps that can monitoring inlet air heating grid normally work, this step specifically can include the following:
S21, control inlet air heating relay conducting, the electricity of electronic control unit ECU the 3rd stitch monitoring common port A point
Pressure.
Whether S22, the voltage judging common port A point are high level.
S23, when the voltage of common port A point is low level less than the voltage of 0.5V, i.e. common port A point, then inlet air heating continues
Electrical equipment is in open-circuit condition, reports inlet air heating relay open fault.
S24, when monitoring common port A point voltage be more than 4.5V, i.e. common port A point voltage be high level, then air inlet adds
Heat grate normally works.
S3, when inlet air heating grid be normal operating conditions, and heat time heating time arrive preset heat time heating time (preset heating time
Between more than 5s) time, it is 0 that electronic control unit ECU controls the second stitch output state, disconnects inlet air heating relay.
It should be noted that there is restriction the heat time heating time for relay, when heat time heating time is less than 5s, inlet air heating grid
To air inlet without heats, when being more than 5s heat time heating time, inlet air heating grid just has heats to air inlet, therefore, sets
The default heat time heating time of inlet air heating relay is more than 5s.
After S4, delay predetermined time delay, the voltage of electronic control unit ECU the 3rd stitch monitoring common port A point.
Whether S5, the voltage judging common port A point are high level.
S6, when the voltage of common port A point be high level, then inlet air heating relay more than the voltage of 4.5V, i.e. common port A point
Device sticks together.
It should be noted that be low level when the voltage of common port A point is less than the voltage of 0.5V, i.e. common port A point, then enter
Gas adds thermorelay and does not sticks together.
Preferably, refer to accompanying drawing 4, a kind of inlet air heating relay fault diagnosis that Fig. 4 provides for the embodiment of the present invention
The further flow chart of method.As shown in Figure 4, the method is on the basis of above-mentioned steps, it is also possible to comprise the steps:
S7, when monitoring inlet air heating relay and sticking together, control air inlet by the control mode of repeatedly open and close
The contact adding thermorelay flicks.
After S8, delay predetermined time delay, the voltage of electronic control unit ECU the 3rd stitch monitoring common port A point.
Whether S9, the voltage judging common port A point are high level.
S10, when the voltage of common port A point is low level less than the voltage of 0.5V, i.e. common port A point, then inlet air heating continues
Electrical equipment does not sticks together.
S11, when the voltage of common port A point is high level more than the voltage of 4.5V, i.e. common port A point, then inlet air heating continues
Electrical equipment sticks together, and reports inlet air heating relay adhesion fault.
Refer to accompanying drawing 5, a kind of inlet air heating relay fault diagnosis system structure that Fig. 5 provides for the embodiment of the present invention
Schematic diagram.As it is shown in figure 5, the invention discloses a kind of inlet air heating relay fault diagnosis system, this system concrete structure bag
Include:
Whether the first monitoring means 501, be 0 for monitoring the output state of electronic control unit ECU the second stitch；
Second monitoring means 502, is used for monitoring current ambient environmental temperature, when ambient temperature reaches preset temperature
Time, can monitoring inlet air heating grid normally work；
Switching units 503, is used for when inlet air heating grid is normal operating conditions, and when heat time heating time arrives default heating
Between time, it is 0 that electronic control unit ECU controls the second stitch output state, disconnect inlet air heating relay；
3rd monitoring means 504, after being used for postponing predetermined time delay, electronic control unit ECU the 3rd stitch monitoring public affairs
Hold the voltage of A point altogether；
Whether the first judging unit 505, be high level for judging the voltage of common port A point, when the voltage of common port A point
Be low level less than the voltage of 0.5V, i.e. common port A point, then inlet air heating relay does not sticks together, when the electricity of common port A point
Pressure is high level more than the voltage of 4.5V, i.e. common port A point, then inlet air heating relay sticks together.
Wherein, concrete, refer to accompanying drawing 6, described second monitoring means 502 includes:
Monitoring subelement 5021, is used for controlling the conducting of inlet air heating relay, and electronic control unit ECU the 3rd stitch is monitored
The voltage of common port A point；
Whether the second judging unit 5022, be high level for judging the voltage of common port A point, when the electricity of common port A point
Pressure is low level less than the voltage of 0.5V, i.e. common port A point, then inlet air heating relay is in open-circuit condition, reports inlet air heating
Relay open fault, is high level, then air inlet when the voltage of monitoring common port A point is more than the voltage of 4.5V, i.e. common port A point
Heater grid normally works.
Preferably, referring to accompanying drawing 7, this system can also include:
Control contact and flick unit 506, for when monitoring inlet air heating relay and sticking together, by repeatedly opening pass
The control mode closed controls the contact of inlet air heating relay and flicks；
4th monitoring means 507, after being used for postponing predetermined time delay, electronic control unit ECU the 3rd stitch monitoring public affairs
Hold the voltage of A point altogether；
Whether the 3rd judging unit 508, be high level for judging the voltage of common port A point, when the voltage of common port A point
Be low level less than the voltage of 0.5V, i.e. common port A point, then inlet air heating relay does not sticks together, when the electricity of common port A point
Pressure is high level more than the voltage of 4.5V, i.e. common port A point, then inlet air heating relay sticks together, and reports inlet air heating relay
Device adhesion fault.
The invention discloses a kind of inlet air heating relay method for diagnosing faults and system, the present invention passes through Electronic Control list
Unit ECU gathers the mode of inlet air heating grid high side voltage, accurately judges relay whether adhesion, electronic control unit EDU's
On stitch T15, whether electro-detection inlet air heating relay output state is 0, if 0, then detection inlet air heating grid flash electricity
Pressure, judges whether inlet air heating relay sticks together when powering on；If inlet air heating relay output state is 1, then exist
After it terminates heating, detect inlet air heating grid high side voltage, judge whether inlet air heating relay occurs after heating
Adhesion, this invention both can detect the inlet air heating relay adhesion state when T15 powers on, and can detect again inlet air heating and continue
Electrical equipment is after heating, if stick together；T15 powers on and carries out relay whether adhesion detection, it is ensured that whether relay can be just
Often use；Heat time heating time is protected, and heat time heating time is less than 5s, and inlet air heating grid without heats, sets relay work to air inlet
The time of work can not be less than 5s；If there is relay adhesion, can shake, by relay by controlling the continuous open and close of relay
Contact flicks；As open fault occurs in inlet air heating grid, when heating, can detect that open fault.
In sum, the invention discloses a kind of inlet air heating relay fault diagnosis circuit, method for diagnosing faults and be
System, whether the present invention, by the way of electronic control unit ECU gathers inlet air heating grid high side voltage, accurately judges relay
Adhesion, on the stitch T15 of electronic control unit EDU, whether electro-detection inlet air heating relay output state is 0, if 0, then examine
Survey inlet air heating grid high side voltage, judge whether inlet air heating relay sticks together when powering on；If inlet air heating continues
Electrical equipment output state is 1, then, after it terminates heating, detect inlet air heating grid high side voltage, judges, after heating, to enter
Gas adds whether thermorelay sticks together, and this invention both can detect the inlet air heating relay adhesion state when T15 powers on,
Inlet air heating relay can be detected again after heating, if stick together；T15 powers on and carries out relay whether adhesion inspection
Survey, it is ensured that whether relay can normally use；Heat time heating time protect, heat time heating time be less than 5s, inlet air heating grid to air inlet without
Heats, set the relay working time can not be less than 5s；If there is relay adhesion, can be continuous by controlling relay
Open and close is shaken, and is flicked by relay contact；As open fault occurs in inlet air heating grid, when heating, can detect
Go out open fault.
It should be noted that each embodiment in this specification all uses the mode gone forward one by one to describe, each embodiment weight
Point explanation is all the difference with other embodiments, and between each embodiment, identical similar part sees mutually.
Being exemplarily described method proposed by the invention above in association with accompanying drawing, the explanation of above example is simply
It is adapted to assist in the core concept understanding the present invention.For one of ordinary skill in the art, according to the thought of the present invention, specifically
All will change on embodiment and range of application, as front-rear axle has motor to participate in the hybrid power system etc. driven.
In sum, this specification content should not be construed as limitation of the present invention.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple amendment to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and features of novelty phase one
The widest scope caused.
Claims (8)
1. an inlet air heating relay fault diagnosis circuit, it is characterised in that including: electronic control unit ECU, inlet air heating
Relay and inlet air heating grid, wherein:
The input circuit phase of first stitch of described electronic control unit ECU and the second stitch and described inlet air heating relay
Even, the described input circuit that described first stitch is described inlet air heating relay provides high side voltage, described second stitch control
Whether the described input circuit making described inlet air heating relay turns on；
Described inlet air heating relay output loop the first end be connected with the positive pole of accumulator, the second end adds with described air inlet
First end of heat grate is connected；
Second end ground connection of described inlet air heating grid；
The of the common port A point of described inlet air heating relay and described inlet air heating grid and described electronic control unit ECU
Three stitch are connected, and described 3rd stitch is the analog acquisition passage of described electronic control unit ECU.
2. an inlet air heating relay method for diagnosing faults, it is characterised in that be applied to inlet air heating relay fault diagnosis
Circuit, described inlet air heating relay fault diagnosis circuit includes: electronic control unit ECU, inlet air heating relay and enter
Gas heater grid, the method includes:
Whether S1, the output state monitoring described electronic control unit ECU the second stitch are 0, if it is not, then enter S2, if
It is that the most described electronic control unit ECU the 3rd stitch monitors the voltage of described common port A point, enters S5；
S2, monitoring current ambient environmental temperature, when ambient temperature reaches preset temperature, monitor described inlet air heating grid
Can normally work；
S3, when described inlet air heating grid be normal operating conditions, and heat time heating time arrive preset heat time heating time (described preset add
The heat time is more than 5s) time, it is 0 that described electronic control unit ECU controls the second stitch output state, disconnects described inlet air heating and continues
Electrical equipment；
After S4, delay predetermined time delay, described electronic control unit ECU the 3rd stitch monitors the voltage of described common port A point；
Whether S5, the voltage judging described common port A point are high level；
S6, when the voltage of described common port A point is more than 4.5V, and the voltage of the most described common port A point is high level, the most described air inlet
Add thermorelay to stick together.
Method the most according to claim 2, it is characterised in that can described monitoring described inlet air heating grid normal work
Make, including:
S21, control described inlet air heating relay conducting, described electronic control unit ECU the 3rd stitch monitor described common port A
The voltage of point；
Whether S22, the voltage judging described common port A point are high level；
S23, when the voltage of described common port A point is less than 0.5V, and the voltage of the most described common port A point is low level, then described in enter
Gas adds thermorelay and is in open-circuit condition, reports described inlet air heating relay open fault；
S24, when monitor described common port A point voltage be more than 4.5V, the voltage of the most described common port A point is high level, then institute
State inlet air heating grid normally to work.
Method the most according to claim 2, it is characterised in that also include:
S7, when monitoring described inlet air heating relay and sticking together, controlled described by the control mode of repeatedly open and close
The contact of inlet air heating relay flicks；
After S8, delay predetermined time delay, described electronic control unit ECU the 3rd stitch monitors the voltage of described common port A point；
Whether S9, the voltage judging described common port A point are high level；
S10, when the voltage of described common port A point is less than 0.5V, and the voltage of the most described common port A point is low level, then described in enter
Gas adds thermorelay and does not sticks together；
S11, when the voltage of described common port A point is more than 4.5V, and the voltage of the most described common port A point is high level, then described in enter
Gas adds thermorelay and sticks together, and reports described inlet air heating relay adhesion fault.
5. according to the method described in claim 2 or 4, it is characterised in that described predetermined time delay is 500ms.
6. an inlet air heating relay fault diagnosis system, it is characterised in that including:
First monitoring means, for monitoring the output state of described electronic control unit ECU the second stitch；
Second monitoring means, is used for monitoring current ambient environmental temperature, when ambient temperature reaches preset temperature, monitors institute
State inlet air heating grid can normally work；
Switching units, is used for when described inlet air heating grid is normal operating conditions, and arrives default heat time heating time heat time heating time
Time, it is 0 that described electronic control unit ECU controls the second stitch output state, disconnects described inlet air heating relay；
3rd monitoring means, after being used for postponing predetermined time delay, described electronic control unit ECU the 3rd stitch monitors described public affairs
Hold the voltage of A point altogether；
Whether the first judging unit, be high level for judging the voltage of described common port A point, when the electricity of described common port A point
Pressure is less than 0.5V, and the voltage of the most described common port A point is low level, and the most described inlet air heating relay does not sticks together, and works as institute
The voltage stating common port A point is more than 4.5V, and the voltage of the most described common port A point is high level, the most described inlet air heating relay
Stick together.
System the most according to claim 6, it is characterised in that described second monitoring means includes:
Monitoring subelement, is used for controlling the conducting of described inlet air heating relay, and described electronic control unit ECU the 3rd stitch is monitored
The voltage of described common port A point；
Whether the second judging unit, be high level for judging the voltage of described common port A point, when the electricity of described common port A point
Pressure is less than 0.5V, and the voltage of the most described common port A point is low level, and the most described inlet air heating relay is in open-circuit condition, report
Described inlet air heating relay open fault, when monitoring the voltage of described common port A point more than 4.5V, the most described common port A point
Voltage be high level, the most described inlet air heating grid normally works.
System the most according to claim 2, it is characterised in that also include:
Control contact and flick unit, for when monitoring described inlet air heating relay and sticking together, by repeatedly open and close
Control mode control described inlet air heating relay contact flick；
4th monitoring means, after being used for postponing predetermined time delay, described electronic control unit ECU the 3rd stitch monitors described public affairs
Hold the voltage of A point altogether；
Whether the 3rd judging unit, be high level for judging the voltage of described common port A point, when the electricity of described common port A point
Pressure is less than 0.5V, and the voltage of the most described common port A point is low level, and the most described inlet air heating relay does not sticks together, and works as institute
The voltage stating common port A point is more than 4.5V, and the voltage of the most described common port A point is high level, the most described inlet air heating relay
Stick together, report described inlet air heating relay adhesion fault.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610769803.2A CN106226694B (en) | 2016-08-30 | 2016-08-30 | A kind of inlet air heating relay fault diagnosis circuit, fault diagnosis method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610769803.2A CN106226694B (en) | 2016-08-30 | 2016-08-30 | A kind of inlet air heating relay fault diagnosis circuit, fault diagnosis method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106226694A true CN106226694A (en) | 2016-12-14 |
| CN106226694B CN106226694B (en) | 2019-03-08 |
Family
ID=58072742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610769803.2A Active CN106226694B (en) | 2016-08-30 | 2016-08-30 | A kind of inlet air heating relay fault diagnosis circuit, fault diagnosis method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106226694B (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107359598A (en) * | 2017-08-30 | 2017-11-17 | 潍柴动力股份有限公司 | A kind of inlet air heating relay fault diagnosis and protection circuit, method and system |
| CN107461285A (en) * | 2017-07-27 | 2017-12-12 | 安徽江淮汽车集团股份有限公司 | Diesel engine intake heating system and its diagnostic method |
| CN106948994B (en) * | 2017-05-26 | 2018-06-01 | 合肥锐科控制系统有限公司 | A kind of engine charge Warming-up control circuit and control method |
| CN108281994A (en) * | 2017-12-19 | 2018-07-13 | 浙江泓林新能源科技有限公司 | A kind of power battery heating safety control system and method |
| CN109254244A (en) * | 2018-10-10 | 2019-01-22 | 中国核动力研究设计院 | A kind of diagnostic system of relay contact failure |
| CN111722104A (en) * | 2020-06-30 | 2020-09-29 | 潍柴动力股份有限公司 | Method and device for detecting state of air inlet heating relay |
| CN112986814A (en) * | 2021-04-28 | 2021-06-18 | 潍柴动力股份有限公司 | Fault diagnosis device and method for relay |
| CN113917322A (en) * | 2021-09-15 | 2022-01-11 | 潍柴动力股份有限公司 | Fault detection method of air inlet heating relay and related device |
| CN114113992A (en) * | 2020-08-25 | 2022-03-01 | 北汽福田汽车股份有限公司 | Power storage battery heating relay adhesion determining method and device and vehicle |
| CN114582670A (en) * | 2022-03-07 | 2022-06-03 | 潍柴动力股份有限公司 | Method and system for judging aging of relay and preventing excessive heating of grating |
| CN114753924A (en) * | 2022-04-21 | 2022-07-15 | 上海三一重机股份有限公司 | Engine preheating protection method and system and working machine |
| CN114582670B (en) * | 2022-03-07 | 2024-05-17 | 潍柴动力股份有限公司 | Method and system for judging ageing of relay and preventing grid from being overheated |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6212741U (en) * | 1985-07-09 | 1987-01-26 | ||
| CN202500683U (en) * | 2011-12-30 | 2012-10-24 | 洛阳理工学院 | Starting preheating control device of automobile engine |
| CN103064401A (en) * | 2012-12-12 | 2013-04-24 | 潍柴动力股份有限公司 | Air inlet heating system fault diagnosis method, controller and system |
| CN104330726A (en) * | 2014-10-24 | 2015-02-04 | 华晨汽车集团控股有限公司 | Relay state diagnosing method applied to high-voltage circuit of electric car |
| US20150241500A1 (en) * | 2012-09-13 | 2015-08-27 | Panasonic Intellectual Property Management Co., Ltd. | Device for detecting welding of relay |
| CN204758746U (en) * | 2015-06-30 | 2015-11-11 | 惠州市亿能电子有限公司 | Do benefit to and judge that electricity adds circuit of electrothermal relay adhesion |
| CN105425144A (en) * | 2015-11-11 | 2016-03-23 | 浙江中控自动化仪表有限公司 | Relay fault detection circuit and fault detection method thereof |
-
2016
- 2016-08-30 CN CN201610769803.2A patent/CN106226694B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6212741U (en) * | 1985-07-09 | 1987-01-26 | ||
| CN202500683U (en) * | 2011-12-30 | 2012-10-24 | 洛阳理工学院 | Starting preheating control device of automobile engine |
| US20150241500A1 (en) * | 2012-09-13 | 2015-08-27 | Panasonic Intellectual Property Management Co., Ltd. | Device for detecting welding of relay |
| CN103064401A (en) * | 2012-12-12 | 2013-04-24 | 潍柴动力股份有限公司 | Air inlet heating system fault diagnosis method, controller and system |
| CN104330726A (en) * | 2014-10-24 | 2015-02-04 | 华晨汽车集团控股有限公司 | Relay state diagnosing method applied to high-voltage circuit of electric car |
| CN204758746U (en) * | 2015-06-30 | 2015-11-11 | 惠州市亿能电子有限公司 | Do benefit to and judge that electricity adds circuit of electrothermal relay adhesion |
| CN105425144A (en) * | 2015-11-11 | 2016-03-23 | 浙江中控自动化仪表有限公司 | Relay fault detection circuit and fault detection method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 陈有兵等: "电控发动机的进气加热监控系统", 《工程机械与维修》 * |
| 陈有兵等: "电控发动机进气加热控制检测研究", 《客车技术与研究》 * |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106948994B (en) * | 2017-05-26 | 2018-06-01 | 合肥锐科控制系统有限公司 | A kind of engine charge Warming-up control circuit and control method |
| CN107461285A (en) * | 2017-07-27 | 2017-12-12 | 安徽江淮汽车集团股份有限公司 | Diesel engine intake heating system and its diagnostic method |
| CN107359598A (en) * | 2017-08-30 | 2017-11-17 | 潍柴动力股份有限公司 | A kind of inlet air heating relay fault diagnosis and protection circuit, method and system |
| CN107359598B (en) * | 2017-08-30 | 2019-09-27 | 潍柴动力股份有限公司 | A kind of inlet air heating relay fault diagnosis and protection circuit, method and system |
| CN108281994A (en) * | 2017-12-19 | 2018-07-13 | 浙江泓林新能源科技有限公司 | A kind of power battery heating safety control system and method |
| CN109254244A (en) * | 2018-10-10 | 2019-01-22 | 中国核动力研究设计院 | A kind of diagnostic system of relay contact failure |
| CN111722104A (en) * | 2020-06-30 | 2020-09-29 | 潍柴动力股份有限公司 | Method and device for detecting state of air inlet heating relay |
| CN111722104B (en) * | 2020-06-30 | 2023-10-20 | 潍柴动力股份有限公司 | Method and device for detecting state of air inlet heating relay |
| CN114113992A (en) * | 2020-08-25 | 2022-03-01 | 北汽福田汽车股份有限公司 | Power storage battery heating relay adhesion determining method and device and vehicle |
| CN114113992B (en) * | 2020-08-25 | 2022-09-20 | 北汽福田汽车股份有限公司 | Power storage battery heating relay adhesion determining method and device and vehicle |
| CN112986814A (en) * | 2021-04-28 | 2021-06-18 | 潍柴动力股份有限公司 | Fault diagnosis device and method for relay |
| CN113917322A (en) * | 2021-09-15 | 2022-01-11 | 潍柴动力股份有限公司 | Fault detection method of air inlet heating relay and related device |
| CN114582670A (en) * | 2022-03-07 | 2022-06-03 | 潍柴动力股份有限公司 | Method and system for judging aging of relay and preventing excessive heating of grating |
| CN114582670B (en) * | 2022-03-07 | 2024-05-17 | 潍柴动力股份有限公司 | Method and system for judging ageing of relay and preventing grid from being overheated |
| CN114753924A (en) * | 2022-04-21 | 2022-07-15 | 上海三一重机股份有限公司 | Engine preheating protection method and system and working machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106226694B (en) | 2019-03-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106226694A (en) | A kind of inlet air heating relay fault diagnosis circuit, method for diagnosing faults and system | |
| CN104205554B (en) | Charge cable | |
| US10464507B2 (en) | Battery management system and switching method thereof | |
| CN102175971A (en) | Relay state detection method and device of electric vehicle high-voltage system | |
| CN105226757A (en) | The trouble-shooter of heating of battery system and method | |
| CN106099255B (en) | A kind of low-temperature heating method and system of electric automobile power battery | |
| CN102332616A (en) | Diagnosis and control method for power battery management system | |
| CN108045266B (en) | Range extender starting control method and device | |
| CN205665378U (en) | Relay adhesion detection circuitry | |
| CN105730258B (en) | The Iganition control system and automobile of automobile | |
| CN103545573B (en) | A kind of method for controlling heating of battery and device | |
| CN107359598B (en) | A kind of inlet air heating relay fault diagnosis and protection circuit, method and system | |
| CN104793135A (en) | Hybrid electric vehicle relay state detection circuit and method thereof | |
| KR101641762B1 (en) | Apparatus and method for preventing damage of precharge resistance and relay | |
| CN109061073A (en) | A kind of oxygen sensor diagnostic device and its diagnostic method | |
| CN105406548B (en) | The whether online detection method of battery in electri forklift charger charging process | |
| CN110341483A (en) | A kind of detection system and detection method of electric vehicle motor controller | |
| CN113495202A (en) | Insulation detection circuit and method and electric automobile | |
| CN103545574B (en) | A kind of method for controlling heating of battery and device | |
| CN103568846B (en) | High-voltage protective system of electric automobile and method | |
| CN206775223U (en) | A kind of modularization intelligent power distribution equipment | |
| CN109932641A (en) | A kind of battery system heating relay method for diagnosing faults and device | |
| CN110165316A (en) | A kind of the battery hierarchical control method and system of electric car | |
| CN206471861U (en) | Detection apparatus for electric automobile's direct current charger | |
| CN106876809B (en) | The security protection system and battery system of battery system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |