CN108626004A - Dual-fuel engine management system and its management method - Google Patents
Dual-fuel engine management system and its management method Download PDFInfo
- Publication number
- CN108626004A CN108626004A CN201810400352.4A CN201810400352A CN108626004A CN 108626004 A CN108626004 A CN 108626004A CN 201810400352 A CN201810400352 A CN 201810400352A CN 108626004 A CN108626004 A CN 108626004A
- Authority
- CN
- China
- Prior art keywords
- fuel
- electric spray
- gas
- original machine
- controller
- 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.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 64
- 238000007726 management method Methods 0.000 title claims abstract description 42
- 239000007921 spray Substances 0.000 claims abstract description 97
- 239000002737 fuel gas Substances 0.000 claims abstract description 94
- 239000007789 gas Substances 0.000 claims abstract description 88
- 239000002283 diesel fuel Substances 0.000 claims abstract description 65
- 239000000567 combustion gas Substances 0.000 claims abstract description 35
- 230000009977 dual effect Effects 0.000 claims abstract description 27
- 238000004891 communication Methods 0.000 claims description 14
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 8
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000000523 sample Substances 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003502 gasoline Substances 0.000 description 3
- 210000000635 valve cell Anatomy 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/224—Diagnosis of the fuel system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0404—Throttle position
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0602—Fuel pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
A kind of dual-fuel engine management system and dual fuel engine management method, fuel gas electric spray valve is controlled by original machine controller, diesel oil solenoid valve is turned on and off, and control engine start or shutdown, fuel gas electric spray controller receives gas pressure force value, boost pressure value, engine rotational speed signal, throttle position signal, and the exhaust temperature signal of each single cylinder is received by original machine controller, in the case where multiple conditions meet simultaneously, the working mode change of control dual-fuel engine management system is dual fuel mode, later diesel oil amount and gas quantity are accurately controlled according to the Map figures to prestore, so that during combustion gas is added, engine operates steadily.Such fuel gas electric spray controller shares out the work and help one another with original machine controller, operating mode handoff-security and can return to dual fuel mode.Fuel cost so is reduced, improves economy, reduces exhaust emissions, is started more reliable and more stable.
Description
Technical field
The present invention relates to technical field of engines, especially a kind of dual-fuel engine management system and its management method.
Background technology
Engine is generally formed by gasoline or diesel driven, gasoline and diesel oil by non-renewable resources PETROLEUM PROCESSING.Cause
This starts to add gas control system on some engines, and substituting part diesel oil by combustion gas in due course burns,
Consumption to reduce gasoline or diesel oil provides power.Existing double fuel control mode has the following problems：1. although newly-increased
Double fuel control unit, but the electric-control system of double fuel control unit and original machine the division of labor and it is indefinite, double fuel control unit with
The electric-control system of original machine all can may receive some engine signals and lead to inconsistent control logic；2. operating mode switches
It is simple and crude, lead to engine roughness；3. dual fuel mode can be entered under the conditions of parameters meet, join in work
Dual fuel mode is will move out in the case that number is undesirable, into pure diesel fuel mode, but dual fuel mode will be difficult in return to later,
Dual fuel mode can just be again returned to by generally requiring shutdown and restarting.
Invention content
In view of this, the present invention provides a kind of newly-increased controllers and original machine controller to share out the work and help one another, operating mode safety
The dual-fuel engine management system and its management method that switches and can return to dual fuel mode, to solve the above problems.
A kind of dual-fuel engine management system, including fuel gas electric spray controller, original machine controller, boost pressure sensing
Device, speed probe, throttle position switch, gaseous-pressure sensor, several single cylinder exhaust gas temperature sensors, fuel gas electric spray
Valve, diesel oil solenoid valve, DC power supply, several fuses, several guard gratings, isolator, bus module, power switch, gas valve
Switch, diesel oil threshold switch, mode switch, scram button, warning device and several intermediate relays, the fuel gas electric spray controller
It is communicated to connect with original machine controller, boost-pressure sensor, speed probe, throttle position switch and gaseous-pressure sensor
It is connect with fuel gas electric spray controller, fuel gas electric spray controller is connect with fuel gas electric spray valve, several single cylinder exhaust gas temperature sensors
It is connect with original machine controller, gas electromagnetic valve and diesel oil the solenoid valve connection of original machine controller and fuel gas electric spray valve, direct current
Source is fuel gas electric spray valve, fuel gas electric spray controller and the power supply of original machine controller, the of the anode connection power switch of DC power supply
One end, the second end of power switch and the first end of several fuses are all connected with, and the second end of a fuse connects original machine control
The power end of device processed, the ground terminal ground connection of original machine controller, the second end of the fuse also respectively by guard grating, isolator and
Bus module is grounded；The second end of one fuse is connect with the power end of fuel gas electric spray controller, fuel gas electric spray controller
Ground terminal is grounded, and the second end of the fuse is also connect with the first end of mode switch, second end and the combustion gas electricity of mode switch
The pattern switching terminal connection of controller is sprayed, the second end of mode switch is also connect with the pattern terminal of original machine controller；Combustion gas
The common warning end of EFI controller is grounded by the first intermediate relay, and the important warning end of fuel gas electric spray controller passes through
Two intermediate relays are grounded, and the first, second intermediate relay and are separately connected different warning devices；The second of one fuse
The first end of end connection gas valve switch, the second end of gas valve switch and the first end of gas electromagnetic valve connect, combustion gas electromagnetism
The second end of valve is grounded, and the third end of gas valve switch is connect with the first control terminal of original machine controller, gas electromagnetic valve also with
Second control terminal of original machine controller connects；The second end of one fuse is connect with the first end of diesel oil threshold switch, diesel oil valve
The second end of switch is connect with the first end of diesel oil solenoid valve, the second end ground connection of diesel oil solenoid valve, the third of diesel oil threshold switch
End is connect with the third control terminal of original machine controller, and diesel oil solenoid valve is also connect with the 4th control terminal of original machine controller；One
The second end of fuse and the first end of scram button connect, the second end of scram button by third in parallel, the 4th among
Relay is grounded, and third intermediate relay is connect with gas electromagnetic valve, and the 4th intermediate relay is connect with diesel oil solenoid valve, this is molten
The second end of disconnected device is also connect with the first end of warning device, the second end ground connection of warning device.
Further, further include power supply indicator, the second end of a fuse passes through power supply indicator and DC power supply
Cathode connection.
Further, further include selecting switch, the first end that the selecting switch is connected to mode switch is melted with corresponding
Between the second end of disconnected device, the selecting switch is for selecting local control model or distance control mode.
Further, further include touch screen, communication module and remote computer, the touch screen is communicated with original machine controller
Connection, and communicated with remote computer by communication module, the communication module is also connect with the communication interface of original machine controller.
Further, further include the first diode, the second end of the gas electromagnetic valve connects the anode of the first diode,
The cathode of first diode and the first end of gas electromagnetic valve connect.
Further, further include the second diode, the second end of the diesel oil solenoid valve connects the anode of the second diode,
The cathode of second diode is connect with the first end of diesel oil solenoid valve.
A kind of dual fuel engine management method, includes the following steps：
Step S1：Complete machine powering initializes；
Step S2：Engine start；
Step S3：Fuel gas electric spray controller or original machine controller judge whether to shut down or emergency shutdown instructs, and is then
S4 is entered step, step S5-S8 is otherwise carried out at the same time；
Step S4：Original machine controller starts engine shutdown procedure；
Step S5：Several single cylinder exhaust gas temperature sensors acquire the delivery temperature of each single cylinder respectively, and are sent to original machine
Controller, original machine controller send the exhaust temperature signal of each single cylinder to fuel gas electric spray controller；
Step S6：Gaseous-pressure sensor acquires the gas pressure force value of engine；
Step S7：Boost-pressure sensor acquires the boost pressure value in air duct in engine, while gaseous-pressure
Sensor acquires the gas pressure force value of engine；
Step S8：The gas pressure force value of gaseous-pressure sensor acquisition pressure reducing valve front before pressure reducing valve, combustion gas after pressure reducing valve
Pressure sensor acquires the gas pressure force value of the position at pressure reducing valve rear portion；
Step S9：When fuel gas electric spray controller judge any single cylinder outlet air temperature be more than silicon carbide range, then into
Enter step S10 and S12；
Step S10：When any single cylinder outlet air temperature be less than interval limit value, enter step S11；
Step S11：The working mode change of dual-fuel engine management system is automatically pure bavin by fuel gas electric spray controller
Oily pattern；
Step S12：When any single cylinder outlet air temperature be more than section upper limit value, then enter step S13；
Step S13：Fuel gas electric spray controller starts common alert program；
Step S14：Further judge whether the outlet air temperature of any single cylinder is more than and shut down critical value, is to enter step
S15, otherwise return to step S13；
Step S15：Fuel gas electric spray controller transmits signal to original machine controller, starts engine by original machine controller and shuts down
Program；
Step S16：Fuel gas electric spray controller judges that gas pressure force value is greater than or equal to first threshold, is to enter step
S11；
Step S17：Fuel gas electric spray controller receives boost pressure value and gas pressure force value, calculates return difference value, and judge back
Whether difference is greater than or equal to second threshold, is to enter step S11；
Step S18：The gas pressure force value of fuel gas electric spray controller reception pressure reducing valve front and the position at pressure reducing valve rear portion
Gas pressure force value, and combustion gas pressure difference is calculated, and judge whether combustion gas pressure difference is greater than or equal to third threshold value, it is to enter step
S11；
Step S19：When the following conditions meet simultaneously：The outlet air temperature of all single cylinders is respectively positioned on silicon carbide model
It encloses, gas pressure force value is less than first threshold, return difference value is less than second threshold, combustion gas pressure difference is less than third threshold value, then fuel gas electric spray
The working mode change of dual-fuel engine management system is automatically dual fuel mode by controller；
Step S20：Under pure diesel fuel mode, if the following conditions meet simultaneously：The outlet air temperature of all single cylinders is more than
Or it is less than first threshold, return difference value less than second threshold, combustion gas pressure difference less than third threshold equal to interval limit value, gas pressure force value
Value, then the working mode change of dual-fuel engine management system is dual fuel mode by fuel gas electric spray controller.
Compared with prior art, dual-fuel engine management system of the invention and dual fuel engine management method pass through
Original machine controller control fuel gas electric spray valve, diesel oil solenoid valve are turned on and off, and control engine start or shutdown, fuel gas electric spray
Controller receives gas pressure force value, boost pressure value, engine rotational speed signal, throttle position signal, and passes through original machine controller
The exhaust temperature signal for receiving each single cylinder controls dual-fuel engine management system in the case where multiple conditions meet simultaneously
Working mode change be dual fuel mode, accurately control diesel oil amount and gas quantity according to the Map figures to prestore later so that combustion
During gas is added, engine operates steadily.Such fuel gas electric spray controller shares out the work and help one another with original machine controller, operating mode
Handoff-security and it can return to dual fuel mode.
Description of the drawings
The embodiment of the present invention is described below in conjunction with attached drawing, wherein：
Fig. 1 is the block diagram of dual-fuel engine management system provided by the invention.
Fig. 2 is the main circuit schematic diagram of dual-fuel engine management system provided by the invention.
Fig. 3 is the flow diagram of dual fuel engine management method provided by the invention.
Fig. 4 is the trend chart of diesel oil and combustion gas in engine in dual fuel mode.
Specific implementation mode
Specific embodiments of the present invention are further elaborated below based on attached drawing.It should be understood that herein
The explanation of the embodiment of the present invention is not intended to limit the scope of protection of the present invention.
It please refers to Fig.1 and Fig. 2, is a kind of dual-fuel engine management system provided by the invention, including fuel gas electric spray
Controller MVC, original machine controller PLC, boost-pressure sensor 110, speed probe 120, throttle position switch 130, combustion
Air pressure force snesor 140, several single cylinder exhaust gas temperature sensors 150, fuel gas electric spray valve YV1, diesel oil solenoid valve YV2,24V direct current
Power supply DC, touch screen B2 and communication module B3, several fuse FU1-FU6, guard grating B4-B5, isolator B6, bus module
B7, power switch SA1, power supply indicator GD1, selecting switch SA2, gas valve switch SA3, diesel oil threshold switch SA5, mode switch
SA4, scram button SB1, warning device HA and intermediate relay K4-K8.
Referring to FIG. 1, fuel gas electric spray controller MVC is connect with original machine controller plc communication, boost-pressure sensor 110,
Speed probe 120, throttle position switch 130 and gaseous-pressure sensor 140 are connect with fuel gas electric spray controller MVC,
Fuel gas electric spray controller MVC is connect with fuel gas electric spray valve YV1.Fuel gas electric spray controller MVC passes through EFI valve opening current signal
Fuel gas electric spray valve YV1 work is controlled, thus accurately regulating gas amount.
Several single cylinder exhaust gas temperature sensors 150 are connect with original machine controller PLC, original machine controller PLC and combustion gas electricity
Spray gas electromagnetic valve TV11 and the YV2 connections of diesel oil solenoid valve of valve YV1.
Touch screen B2 is connect with original machine controller plc communication, and is communicated with remote computer by communication module B3.
24V DC power supplies DC is fuel gas electric spray valve YV1, fuel gas electric spray controller MVC, original machine controller PLC and touch screen
B2 powers.
Referring to FIG. 2, the first end of the anode connection power switch SA1 of 24V DC power supplies DC, the of power switch SA1
Two ends and the first end of several fuse FU1-FU6 are all connected with.Air switch QF1 is equipped at 24V DC power supplies DC.
The second end of fuse FU1 is connect or is grounded with the cathode of 24V DC power supplies DC by power supply indicator GD1.Figure
The GD1 that middle dotted portion indicates is remote power supply indicator light.
The power end of the second end connection original machine controller PLC of fuse FU2, the ground terminal ground connection of original machine controller PLC.
The second end of fuse FU2 also passes through communication module B3, guard grating B4-B5, isolator B6, bus module B7 ground connection respectively.It is logical
News module B3 is also connect with the communication interface of original machine controller PLC.
The second end of fuse FU3 is connect with the power end of fuel gas electric spray controller MVC, fuel gas electric spray controller MVC's
Ground terminal is grounded.The second end of fuse FU3 is also connect with the first end of selecting switch SA2, the second end of selecting switch SA2 with
The first end of mode switch SA4 connects, the pattern switching terminal of the second end and fuel gas electric spray controller MVC of mode switch SA4
Connection, also connect with the pattern terminal 0.0 of original machine controller PLC.It is dual fuel mode that mode switch SA4, which is closed, is broken as pure
Diesel fuel mode.
Selecting switch SA2 is for selecting local control model or distance control mode, dotted portion indicates in figure SA4
It is remote mode switch.
The ready end of fuel gas electric spray controller MVC is grounded by intermediate relay K6；Fuel gas electric spray controller MVC's is common
Warning end is grounded by intermediate relay K7, and the important warning end of fuel gas electric spray controller MVC is grounded by intermediate relay K8.
Intermediate relay K7 and K8 are respectively used to control different warning device HA.
The first end of the second end connection gas valve switch SA3 of fuse FU4, the second end of gas valve switch SA3 and combustion
The first end of pneumoelectric magnet valve TV11 connects, the second end ground connection of gas electromagnetic valve TV11.The third end of gas valve switch SA3 and original
The control terminal 1.4 of machine controller PLC connects, and gas electromagnetic valve TV11 is also connect with the control terminal 1.2 of original machine controller PLC.It is former
The control terminal 1.4 of machine controller PLC controls the power supply of gas electromagnetic valve TV11, the control combustion of control terminal 1.2 of original machine controller PLC
The valve cell of pneumoelectric magnet valve TV11 is turned on and off.
The anode of the second end connection diode D1 of gas electromagnetic valve TV11, the cathode and gas electromagnetic valve of diode D1
The first end of TV11 connects.
The second end of fuse FU5 is connect with the first end of diesel oil threshold switch SA5, the second end of diesel oil threshold switch SA5 with
The first end of diesel oil solenoid valve YV2 connects, the second end ground connection of diesel oil solenoid valve YV2.The third end of diesel oil threshold switch SA5 and original
The control terminal 1.5 of machine controller PLC connects, and diesel oil solenoid valve YV2 is also connect with the control terminal 1.3 of original machine controller PLC.Original machine
The control terminal 1.5 of controller PLC controls the power supply of diesel oil solenoid valve YV2, and the control terminal 1.3 of original machine controller PLC controls diesel oil
The valve cell of solenoid valve YV2 is turned on and off.
The anode of the second end connection diode D2 of diesel oil solenoid valve YV2, cathode and the diesel oil solenoid valve YV2 of diode D2
First end connection.
The second end of fuse FU6 is connect with the first end of scram button SB1, during the second end of scram button SB1 passes through
Between relay K4-K5 ground connection.Intermediate relay K4, K5 are in parallel.Intermediate relay K4 is used to control the valve of gas electromagnetic valve TV11
Unit is turned on and off, and the valve cell that intermediate relay K5 is used to control diesel oil solenoid valve YV2 is turned on and off.Dotted line part in figure
It is long-range scram button to divide the SB1 indicated.
The second end of fuse FU6 is also connect with the first end of warning device HA, the second end ground connection of warning device HA.Figure
The HA that middle dotted portion indicates is remote alarming device.
The parking end of original machine controller PLC is also associated with shutdown switch.
Diesel oil-combustion gas Map figures are previously stored in fuel gas electric spray controller MVC, when dual-fuel engine management system into
When entering dual fuel mode, fuel gas electric spray controller MVC judges according to engine rotational speed signal, throttle position signal etc. in engine
Diesel oil amount, the air inlet amount in engine is judged according to boost pressure value etc., engine is judged according to gas pressure force value etc.
In gas quantity, in the case where maintaining current rotating speed, step up combustion gas supply replace part diesel oil acting, according to bavin
Oil-combustion gas Map figures, generates desired diesel oil amount under current rotating speed, i.e., reduces throttle automatically, as shown in Figure 4.
When orderly closedown, first mode switch SA4 is disconnected, is switched to pure diesel fuel mode, when engine speed is down to shutdown
When condition, shutdown switch is switched to parking position, engine cut-off.It can be carried out automatically according to preset program above.
When needing emergency shutdown, presses scram button SB1, diesel oil solenoid valve YV2 and gas electromagnetic valve TV11 and be turned off, together
When fuel gas electric spray controller MVC automatically switch to pure diesel fuel mode.Later autostop is carried out according to orderly closedown pattern.
Referring to FIG. 3, dual fuel engine management method provided by the invention includes the following steps：
Step S1：Complete machine powering initializes.
Step S2：Engine start.
Step S3：Fuel gas electric spray controller MVC or original machine controller PLC judges whether to shut down or emergency shutdown refers to
It enables, is to enter step S4, is otherwise carried out at the same time step S5-S8.The location of this step can be arbitrary in this method
Position.
Step S4：Original machine controller PLC starts engine shutdown procedure.
Step S5：Several single cylinder exhaust gas temperature sensors 150 acquire the delivery temperature of each single cylinder respectively, and are sent to original
Machine controller PLC, original machine controller PLC send the exhaust temperature signal of each single cylinder to fuel gas electric spray by bus module B7
Controller MVC.
Step S6：Gaseous-pressure sensor 140 acquires the gas pressure force value of the position at the pressure reducing valve rear portion of engine.Combustion gas
Pressure sensor 140 includes gaseous-pressure sensor after gaseous-pressure sensor before pressure reducing valve and pressure reducing valve, wherein before pressure reducing valve
Gaseous-pressure sensor acquires the gas pressure force value of pressure reducing valve front, and gaseous-pressure sensor acquires pressure reducing valve rear portion after pressure reducing valve
Position gas pressure force value, using the gas pressure force value of the position at pressure reducing valve rear portion as gas pressure force value.
Step S7：Boost-pressure sensor 110 acquires the boost pressure value in air duct, pressure reducing valve after-burning in engine
Air pressure force snesor acquires the gas pressure force value of the position at the pressure reducing valve rear portion of engine.
Step S8：The gas pressure force value of gaseous-pressure sensor acquisition pressure reducing valve front before pressure reducing valve, combustion gas after pressure reducing valve
Pressure sensor acquires the gas pressure force value of the position at pressure reducing valve rear portion.
Step S9：It is stored with silicon carbide value range in fuel gas electric spray controller MVC, when fuel gas electric spray controller MVC sentences
The outlet air temperature of disconnected any single cylinder is more than this silicon carbide range, then enters step S10 and S12.
Step S10：There are one section upper limit value and an interval limit values for the silicon carbide range tool, when any single cylinder
Outlet air temperature be less than interval limit value, fuel gas electric spray controller MVC judges that the working condition of engine is unsuitable for combustion gas work
Make, enters step S11.
Step S11：The working mode change of dual-fuel engine management system is automatically pure by fuel gas electric spray controller MVC
Diesel fuel mode.
Step S12：When the outlet air temperature of any single cylinder is more than section upper limit value, fuel gas electric spray controller MVC judges hair
The working condition of motivation is unsuitable for working on, then enters step S13.
Step S13：Fuel gas electric spray controller MVC starts common alert program, that is, controls warning device HA work, but not shadow
Engine is rung to work on.
Step S14：Further judge whether the outlet air temperature of any single cylinder is more than and shut down critical value, is to enter step
S15, otherwise return to step S13.
Step S15：Fuel gas electric spray controller MVC transmits signal to original machine controller PLC, is started by original machine controller PLC
Engine shutdown procedure.
Step S16：Fuel gas electric spray controller MVC judges that gas pressure force value is greater than or equal to first threshold, is then to enter step
Rapid S11.
Step S17：Fuel gas electric spray controller MVC receives boost pressure value and gas pressure force value, calculates return difference value, i.e. combustion gas
The difference of pressure value and boost pressure value.Change since gas pressure force value changes with boost pressure value, and gaseous-pressure is higher than
Boost pressure value, generally 0.5-1.5bar.Fuel gas electric spray controller MVC judges whether return difference value is greater than or equal to the second threshold again
Value, is to enter step S11.
Step S18：Fuel gas electric spray controller MVC receives the position of the gas pressure force value and pressure reducing valve rear portion of pressure reducing valve front
Gas pressure force value, and calculate combustion gas pressure difference, i.e. the combustion gas of the gas pressure force value and pressure reducing valve front of the position at pressure reducing valve rear portion
The difference of pressure value.Fuel gas electric spray controller MVC judges whether combustion gas pressure difference is greater than or equal to third threshold value again, is then to enter step
Rapid S11.
Step S19：When the following conditions meet simultaneously：The outlet air temperature of all single cylinders is respectively positioned on silicon carbide model
It encloses, gas pressure force value is less than first threshold, return difference value is less than second threshold, combustion gas pressure difference is less than third threshold value, then fuel gas electric spray
The working mode change of dual-fuel engine management system is automatically dual fuel mode by controller MVC.
Step S20：Under pure diesel fuel mode, fuel gas electric spray controller MVC judge any single cylinder outlet air temperature whether
More than or equal to interval limit value, if still less than interval limit value, persistently judge.
Step S21：Under pure diesel fuel mode, fuel gas electric spray controller MVC judges whether gas pressure force value is less than the first threshold
Value, if still greater than or be equal to first threshold, persistently judge.
Step S22：Under pure diesel fuel mode, fuel gas electric spray controller MVC judges whether return difference value is less than second threshold, if
Still greater than or equal to second threshold, then persistently judge.
Step S23：Under pure diesel fuel mode, fuel gas electric spray controller MVC judges whether combustion gas pressure difference is less than third threshold value,
If still greater than or equal to third threshold value, persistently judge.
If the following conditions meet simultaneously：The outlet air temperature of all single cylinders is greater than or equal to interval limit value, gas pressure
Force value is less than first threshold, return difference value is less than second threshold, combustion gas pressure difference is less than third threshold value, then fuel gas electric spray controller MVC
It is dual fuel mode by the working mode change of dual-fuel engine management system.
Compared with prior art, dual-fuel engine management system of the invention and dual fuel engine management method pass through
Original machine controller PLC control fuel gas electric spray valves YV1, diesel oil solenoid valve YV2 are turned on and off, and control engine start or stop
Machine, fuel gas electric spray controller MVC receive gas pressure force value, boost pressure value, engine rotational speed signal, throttle position signal, and
The exhaust temperature signal that each single cylinder is received by original machine controller PLC, in the case where multiple conditions meet simultaneously, control is double
The working mode change of fuel delivery machine management system is dual fuel mode, accurately controls bavin according to the Map figures to prestore later
Oil mass and gas quantity so that during combustion gas is added, engine operates steadily.Such fuel gas electric spray controller MVC and original machine
Controller PLC shares out the work and help one another, operating mode handoff-security and can return to dual fuel mode.It so realizes and a part is replaced by combustion gas
Diesel oil does work, and reduces fuel cost, improves economy, reduces exhaust emissions, relatively pure combustion gas scheme, and diesel oil starts more
Add it is reliable and stable, it is more convenient, startup stage have advantage.
The foregoing is merely a prefered embodiment of the invention, is not used to limitation protection scope of the present invention, any in the present invention
Modification, equivalent replacement or improvement in spirit etc., all cover in scope of the presently claimed invention.
Claims (7)
1. a kind of dual-fuel engine management system, it is characterised in that：The dual-fuel engine management system includes combustion gas electricity
Spray controller, original machine controller, boost-pressure sensor, speed probe, throttle position switch, gaseous-pressure sensor,
Several single cylinder exhaust gas temperature sensors, fuel gas electric spray valve, diesel oil solenoid valve, DC power supply, several fuses, several guard gratings,
If isolator, bus module, power switch, gas valve switch, diesel oil threshold switch, mode switch, scram button, warning device and
Dry intermediate relay, the fuel gas electric spray controller are communicated to connect with original machine controller, boost-pressure sensor, revolution speed sensing
Device, throttle position switch and gaseous-pressure sensor are connect with fuel gas electric spray controller, fuel gas electric spray controller and combustion gas
Electric spray valve connects, and several single cylinder exhaust gas temperature sensors connect with original machine controller, original machine controller and fuel gas electric spray valve
Gas electromagnetic valve and the connection of diesel oil solenoid valve, DC power supply are that fuel gas electric spray valve, fuel gas electric spray controller and original machine controller supply
Electricity, the first end of the anode connection power switch of DC power supply, the second end of power switch and the first end of several fuses are equal
Connection, the power end of the second end connection original machine controller of a fuse, the ground terminal ground connection of original machine controller, the fuse
Second end also respectively pass through guard grating, isolator and bus module be grounded；The second end of one fuse and fuel gas electric spray control
The power end of device processed connects, the ground terminal ground connection of fuel gas electric spray controller, the second end of the fuse also with mode switch the
One end connects, and the second end of mode switch is connect with the pattern switching terminal of fuel gas electric spray controller, the second end of mode switch
Also it is connect with the pattern terminal of original machine controller；The common warning end of fuel gas electric spray controller is connect by the first intermediate relay
The important warning end on ground, fuel gas electric spray controller is grounded by the second intermediate relay, the first, second intermediate relay and difference
Connect different warning devices；The first end of the second end connection gas valve switch of one fuse, the second of gas valve switch
End is connect with the first end of gas electromagnetic valve, the second end ground connection of gas electromagnetic valve, the third end of gas valve switch and original machine control
First control terminal of device processed connects, and gas electromagnetic valve is also connect with the second control terminal of original machine controller；The of one fuse
Two ends are connect with the first end of diesel oil threshold switch, and the second end of diesel oil threshold switch is connect with the first end of diesel oil solenoid valve, diesel oil
The second end of solenoid valve is grounded, and the third end of diesel oil threshold switch is connect with the third control terminal of original machine controller, diesel oil solenoid valve
Also it is connect with the 4th control terminal of original machine controller；The first end connection of the second end and scram button of one fuse, emergency stop
The second end of button is grounded by third in parallel, the 4th intermediate relay, and third intermediate relay is connect with gas electromagnetic valve,
4th intermediate relay is connect with diesel oil solenoid valve, and the second end of the fuse is also connect with the first end of warning device, alarm
The second end of device is grounded.
2. dual-fuel engine management system as described in claim 1, it is characterised in that：Further include power supply indicator, one
The second end of fuse is connected by the cathode of power supply indicator and DC power supply.
3. dual-fuel engine management system as described in claim 1, it is characterised in that：Further include selecting switch, the choosing
It selects switch to be connected between the first end of mode switch and the second end of corresponding fuse, the selecting switch is for selecting this
Ground control model or distance control mode.
4. dual-fuel engine management system as claimed in claim 3, it is characterised in that：Further include touch screen, communication module
And remote computer, the touch screen is communicated to connect with original machine controller, and is communicated with remote computer by communication module, institute
Communication module is stated also to connect with the communication interface of original machine controller.
5. dual-fuel engine management system as described in claim 1, it is characterised in that：Further include the first diode, it is described
The second end of gas electromagnetic valve connects the anode of the first diode, and the cathode of the first diode and the first end of gas electromagnetic valve connect
It connects.
6. dual-fuel engine management system as described in claim 1, it is characterised in that：Further include the second diode, it is described
The second end of diesel oil solenoid valve connects the anode of the second diode, and the cathode of the second diode connects with the first end of diesel oil solenoid valve
It connects.
7. a kind of dual fuel engine management method, includes the following steps：
Step S1：Complete machine powering initializes；
Step S2：Engine start；
Step S3：Fuel gas electric spray controller or original machine controller judge whether to shut down or emergency shutdown instructs, and is to enter
Otherwise step S4 is carried out at the same time step S5-S8；
Step S4：Original machine controller starts engine shutdown procedure；
Step S5：Several single cylinder exhaust gas temperature sensors acquire the delivery temperature of each single cylinder respectively, and are sent to original machine control
Device, original machine controller send the exhaust temperature signal of each single cylinder to fuel gas electric spray controller；
Step S6：Gaseous-pressure sensor acquires the gas pressure force value of engine；
Step S7：Boost-pressure sensor acquires the boost pressure value in air duct in engine, while gaseous-pressure senses
Device acquires the gas pressure force value of engine；
Step S8：The gas pressure force value of gaseous-pressure sensor acquisition pressure reducing valve front before pressure reducing valve, gaseous-pressure after pressure reducing valve
Sensor acquires the gas pressure force value of the position at pressure reducing valve rear portion；
Step S9：When fuel gas electric spray controller judges that the outlet air temperature of any single cylinder is more than silicon carbide range, then entrance walks
Rapid S10 and S12；
Step S10：When any single cylinder outlet air temperature be less than interval limit value, enter step S11；
Step S11：The working mode change of dual-fuel engine management system is automatically pure diesel oil mould by fuel gas electric spray controller
Formula；
Step S12：When any single cylinder outlet air temperature be more than section upper limit value, then enter step S13；
Step S13：Fuel gas electric spray controller starts common alert program；
Step S14：Further judge whether the outlet air temperature of any single cylinder is more than and shut down critical value, is to enter step S15,
Otherwise return to step S13；
Step S15：Fuel gas electric spray controller transmits signal to original machine controller, starts engine by original machine controller and shuts down journey
Sequence；
Step S16：Fuel gas electric spray controller judges that gas pressure force value is greater than or equal to first threshold, is to enter step S11；
Step S17：Fuel gas electric spray controller receives boost pressure value and gas pressure force value, calculates return difference value, and judge return difference value
Whether it is greater than or equal to second threshold, is to enter step S11；
Step S18：Fuel gas electric spray controller receives the combustion gas of the gas pressure force value of pressure reducing valve front and the position at pressure reducing valve rear portion
Pressure value, and combustion gas pressure difference is calculated, and judge whether combustion gas pressure difference is greater than or equal to third threshold value, it is to enter step S11；
Step S19：When the following conditions meet simultaneously：The outlet air temperature of all single cylinders is respectively positioned on silicon carbide range, combustion
Air pressure force value is less than first threshold, return difference value is less than second threshold, combustion gas pressure difference is less than third threshold value, then fuel gas electric spray controller
Automatically it is dual fuel mode by the working mode change of dual-fuel engine management system；
Step S20：Under pure diesel fuel mode, if the following conditions meet simultaneously：The outlet air temperature of all single cylinders is more than or waits
It is less than third threshold value less than second threshold, combustion gas pressure difference less than first threshold, return difference value in interval limit value, gas pressure force value,
Then the working mode change of dual-fuel engine management system is dual fuel mode by fuel gas electric spray controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810400352.4A CN108626004A (en) | 2018-04-28 | 2018-04-28 | Dual-fuel engine management system and its management method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810400352.4A CN108626004A (en) | 2018-04-28 | 2018-04-28 | Dual-fuel engine management system and its management method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108626004A true CN108626004A (en) | 2018-10-09 |
Family
ID=63694964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810400352.4A Pending CN108626004A (en) | 2018-04-28 | 2018-04-28 | Dual-fuel engine management system and its management method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108626004A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5868121A (en) * | 1997-12-19 | 1999-02-09 | Caterpillar Inc. | Method and apparatus for relieving a differential pressure across a gaseous fuel admission valve of a dual fuel engine |
| US20020007805A1 (en) * | 1998-10-13 | 2002-01-24 | Green Jason E. | Bi-fuel control system and retrofit assembly for diesel engines |
| CN103016168A (en) * | 2011-09-22 | 2013-04-03 | 北京易控凌博汽车电子技术有限公司 | Diesel engine/natural gas dual-fuel engine electric control system |
| CN103982308A (en) * | 2014-05-06 | 2014-08-13 | 南京盖驰动力科技有限公司 | Control system and control method of oil/gas dual-fuel engine in electronic control oil supply |
| CN105697161A (en) * | 2016-02-03 | 2016-06-22 | 福州大学 | Control system of LNG/diesel oil dual-fuel engine |
| CN208203425U (en) * | 2018-04-28 | 2018-12-07 | 海茵茨曼动力控制（嘉兴）有限公司 | dual-fuel engine management system |
-
2018
- 2018-04-28 CN CN201810400352.4A patent/CN108626004A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5868121A (en) * | 1997-12-19 | 1999-02-09 | Caterpillar Inc. | Method and apparatus for relieving a differential pressure across a gaseous fuel admission valve of a dual fuel engine |
| US20020007805A1 (en) * | 1998-10-13 | 2002-01-24 | Green Jason E. | Bi-fuel control system and retrofit assembly for diesel engines |
| CN103016168A (en) * | 2011-09-22 | 2013-04-03 | 北京易控凌博汽车电子技术有限公司 | Diesel engine/natural gas dual-fuel engine electric control system |
| CN103982308A (en) * | 2014-05-06 | 2014-08-13 | 南京盖驰动力科技有限公司 | Control system and control method of oil/gas dual-fuel engine in electronic control oil supply |
| CN105697161A (en) * | 2016-02-03 | 2016-06-22 | 福州大学 | Control system of LNG/diesel oil dual-fuel engine |
| CN208203425U (en) * | 2018-04-28 | 2018-12-07 | 海茵茨曼动力控制（嘉兴）有限公司 | dual-fuel engine management system |
Non-Patent Citations (2)
| Title |
|---|
| 傅明初;: "浦海211轮LNG双燃料动力改造" * |
| 张成江;石志勇;唐永华;: "双燃料发动机研制与性能试验等方面的研究" * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103016168A (en) | Diesel engine/natural gas dual-fuel engine electric control system | |
| CN104632432B (en) | Commercial car gas engine electronic-controlled installation and its control method | |
| CN108621809B (en) | A kind of permanent-magnet synchronous increasing journey system full working scope control method | |
| CN105697161A (en) | Control system of LNG/diesel oil dual-fuel engine | |
| CN103061926A (en) | System for preheating fuel oil of automotive diesel engine in winter and control method of system | |
| CN104533643A (en) | Gas engine lean combustion control method and system | |
| CN102155320B (en) | Genset engine with an electronic fuel injection system | |
| CN102501814B (en) | Air conditioning control panel system of electrombile and control method thereof | |
| CN107514023B (en) | Energy-saving control device and control method for excavator | |
| CN206054114U (en) | Natural gas engine is without electronic throttle intake-air quantity control apparatus | |
| CN208203425U (en) | dual-fuel engine management system | |
| CN204716409U (en) | Marine high-pressure common rail diesel engine automatical control system | |
| CN108626004A (en) | Dual-fuel engine management system and its management method | |
| CN105971746A (en) | Control system for marine medium-speed micro-jet ignition type dual-fuel engine | |
| CN102182573B (en) | Method for controlling load of electrospray diesel engine of diesel locomotive | |
| CN102305136B (en) | Automobile fuel control method and controller | |
| CN102182569A (en) | Burnable methanol fuel device of electrospray gasoline engine | |
| CN110296005B (en) | Natural gas engine double-output mode control system and control method | |
| CN111810340A (en) | Automatic start-stop control device for motorcycle and implementation method thereof | |
| CN201457070U (en) | Control device of double-accelerator electric-control engine of bidirectional running frame vehicle | |
| CN103511094B (en) | A kind of engine control and device | |
| CN211172173U (en) | Excavator control system | |
| CN102434442B (en) | Control module of automobile air conditioning compressor and control method of control module | |
| CN203347928U (en) | Small engine electronic control unit with igniting function | |
| CN101644208B (en) | Engine energy-saving and emission-reducing system coordinated by heat pipe and cold pipe and working method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181009 |
|
| RJ01 | Rejection of invention patent application after publication |