CN106837566A - A kind of natural gas engine electric-control system and co-generation unit - Google Patents
A kind of natural gas engine electric-control system and co-generation unit Download PDFInfo
- Publication number
- CN106837566A CN106837566A CN201710047736.8A CN201710047736A CN106837566A CN 106837566 A CN106837566 A CN 106837566A CN 201710047736 A CN201710047736 A CN 201710047736A CN 106837566 A CN106837566 A CN 106837566A
- Authority
- CN
- China
- Prior art keywords
- natural gas
- engine
- control system
- valve
- gas engine
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/02—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
- F02D19/021—Control of components of the fuel supply system
- F02D19/022—Control of components of the fuel supply system to adjust the fuel pressure, temperature or composition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/02—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
- F02D19/021—Control of components of the fuel supply system
- F02D19/023—Control of components of the fuel supply system to adjust the fuel mass or volume flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/12—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having slidably-mounted valve members; having valve members movable longitudinally of conduit
- F02D9/14—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having slidably-mounted valve members; having valve members movable longitudinally of conduit the members being slidable transversely of conduit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
-
- 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
- F02D2200/0406—Intake manifold 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
- F02D2200/06—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
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0606—Fuel temperature
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The invention discloses a kind of natural gas engine electric-control system and co-generation unit, it is related to cogeneration of heat and power technical field, solves the problems, such as that its use when gasoline air mixture ratio regulates and controls in natural gas engine of existing natural gas engine electric-control system is limited.The natural gas engine electric-control system includes engine electronic control unit, it is arranged on the regulating valve of damming in the natural gas air inlet pipe being connected with engine air throttle, and the drive device being connected with the valve element of regulating valve of damming, drive device is connected with engine electronic control unit signal, the natural gas demand adjustment signal that drive device sends according to engine electronic control unit drives valve core movement, regulates and controls aperture of the regulating valve in 0~100% scope of damming.The natural gas air inflow that the natural gas engine electric-control system and co-generation unit that the present invention is provided are used for natural gas engine is adjusted.
Description
Technical field
The present invention relates to cogeneration of heat and power technical field, more particularly to a kind of natural gas engine electric-control system and cogeneration of heat and power
System.
Background technology
Co-generation unit (Combined Heating and Power system, abbreviation CHP) is by using from Gao Pin
The tandem heat recovery mode that potential energy is reclaimed step by step to low-grade energy, realizes the cascade utilization of the energy.Common cogeneration of heat and power system
System, specifically provides power source, then using natural gas engine, Diesel engine or petrol engine for generating set generates electricity
The waste heat recovery that will be produced in generating set power generation process is used for heat supply.
As a example by using natural gas engine as its power source, automatic fortune of the natural gas engine in co-generation unit
OK, the control of natural gas engine electric-control system is often relied on to realize.At present, conventional natural gas engine electric-control system
Mainly have following two：
The first electric-control system is as shown in figure 1, hereinafter referred to as electric-control system one.In electric-control system one, natural gas enters
Tracheae 1 is connected by pressure reducer 12 with the air throttle 31 of natural gas engine 3, is connected to by pressure reducer 12 and engine electronic control system
The signal of unit 4 connection gas pressure force control valve 5, and gas pressure force control valve 5 also with the inlet manifold 33 of natural gas engine 3
It is connected, the arrival end of inlet manifold 33 is provided with the air inlet temperature/pressure sensor being connected with the signal of engine electronic control unit 4
42.The air inlet that the atmospheric pressure value that engine electronic control unit 4 prestores according to it is fed back with air inlet temperature/pressure sensor 42
The size of the difference of pressure value, the aperture size of correspondence regulation and control gas pressure force control valve 5, so that the part in natural gas air inlet pipe 1
Natural gas is directly entered motor intake manifold 33 when pressure reducer 12 is flowed through by gas pressure force control valve 5, and natural gas is entered
Pressure reducer 12, engine air throttle 31 are flowed through in tracheae 1 to be mended into the main air inflow of natural gas of motor intake manifold 33
Fill adjustment so that in natural gas engine 3 actual mixing ratio of gaseous mixture because of accounting of the natural gas total amount in gaseous mixture not
Change together, realize the regulation and control of gaseous mixture actual mixing ratio in a pair of natural gas engines of electric-control system 3.
However, in the actual motion of natural gas engine 3, due to the air inlet pressure force value and atmospheric pressure of inlet manifold 33
The difference of value is smaller so that engine electronic control unit 4 when the aperture of gas pressure force control valve 5 is regulated and controled, by gas pressure
Force control valve 5 be directly entered the natural gas of motor intake manifold 33 can magnitude of recruitment it is less, also allow for natural gas engine 3
The scope of the actual mixing ratio variable adjustment of middle gaseous mixture is smaller, causes electric-control system more than to be applied to natural gas engine 3
The regulation and control of its gasoline air mixture ratio during in homogeneous equivalent proportion combustion conditions, and be not suitable for natural gas engine 3 and be in lean-burn work
The regulation and control of its gasoline air mixture ratio during condition.
Second electric-control system is as shown in Fig. 2 hereinafter referred to as electric-control system two.In electric-control system two, natural gas enters
Tracheae 1 is connected by combustion gas air throttle 6 with engine air throttle 31, combustion gas air throttle 6 and the signal of engine electronic control unit 4
Connection, and combustion gas bypass pipe 7 is connect by the two ends of combustion gas air throttle 6.Engine electronic control unit 4 is by regulating and controlling combustion gas air throttle
6 aperture, can be adjusted to natural gas into the main air inflow of engine air throttle 31；And the connection combustion of combustion gas bypass pipe 7
The two ends of throttle valve 6, made portion of natural gas in natural gas air inlet pipe 1 before combustion gas air throttle 6 is entered, you can by combustion
Gas bypass pipe 7 is directly entered in engine air throttle 31, and engine air throttle 31 is entered by combustion gas air throttle 6 to natural gas
Main air inflow carries out quantitative supplement.And pass through the quantitative gas discharge of combustion gas bypass pipe 7, it is natural with reference to combustion gas air throttle 6 pairs
Gas enters the regulated quantity of the main air inflow of engine air throttle 31, can make the actual mixing ratio of gaseous mixture in natural gas engine 3
Change because accounting of the natural gas total amount in gaseous mixture is different, realize electric-control system two to gaseous mixture in natural gas engine 3
The regulation and control of actual mixing ratio.
However, combustion gas air throttle 6 enters the regulating power of the air inflow of engine air throttle 31 to natural gas, not only it is limited
The diameter dimension of air throttle in combustion gas air throttle 6, is also limited by operating mode residing for natural gas engine 3.For example, common combustion
A diameter of more than 30 millimeters of the air throttle of throttle valve 6, it is adaptable to the natural gas hair that 30kw power above generating sets are used
Motivation 3, when the air throttle of combustion gas air throttle 6 is minimum aperture, can correspond to will be much larger than low by its natural gas flow flux
Natural gas minimum regulation and control amount of the power section as needed for the natural gas engine 3 that 20kw power small power generation units are used, causes
It is not used in the natural gas engine 3 that low power period such as 20kw power small power generation unit is used；And natural gas engine
When machine 3 is in the high load working condition or the fully closed small load condition of combustion gas air throttle 6 of the standard-sized sheet of combustion gas air throttle 6, combustion gas air throttle 6
Also flow that just cannot be again to natural gas is adjusted.So also result in the natural gas engine 3 of low power period or
In the end value load condition of natural gas engine 3, electric-control system two is difficult to actual empty for gaseous mixture in natural gas engine 3
The regulation and control demand of ratio is fired, Reasonable Regulation And Control is carried out to natural gas air inflow.
From the foregoing, it will be observed that two kinds of conventional at present natural gas engine electric-control systems are carrying out its mixing to natural gas engine
In the regulation process of gas air-fuel ratio, electric-control system one is not suitable for the Lean Burn Operating of natural gas engine 3, and electric-control system two is not
The end value load condition of natural gas engine 3 and natural gas engine 3 suitable for low power period, i.e., existing electric-control system
One and electric-control system two there is a problem of when gasoline air mixture ratio in natural gas engine regulates and controls using limited.
The content of the invention
It is existing for solving it is an object of the invention to provide a kind of natural gas engine electric-control system and co-generation unit
Have natural gas engine electric-control system when gasoline air mixture ratio regulates and controls in natural gas engine its asked using limited
Topic.
To achieve these goals, the present invention provides following technical scheme：
The first aspect of the present invention provides a kind of natural gas engine electric-control system, including engine electronic control unit,
The regulating valve of damming in the natural gas air inlet pipe being connected with engine air throttle is arranged on, and is passed with the valve element of regulating valve of damming
The drive device of dynamic connection, and drive device is connected with engine electronic control unit signal, drive device is according to starting electromechanics
The natural gas demand adjustment signal that sub-control unit sends drives valve core movement, and regulation and control dam regulating valve in 0~100% scope
Aperture.
Compared with prior art, the natural gas engine electric-control system that the present invention is provided has the advantages that：
The natural gas engine electric-control system that the present invention is provided, sets regulating valve of damming, and cut in natural gas air inlet pipe
The valve element and drive device for flowing regulating valve are connected, and drive device is connected with engine electronic control unit signal so that day
Natural gas in right gas air inlet pipe flow through dam regulating valve when, engine electronic control unit is according to natural gas engine to entering
Enter the demand of natural gas air inflow in engine air throttle, send natural gas demand adjustment signal to drive device, so drive
Dynamic device drives the valve core movement of regulating valve of damming to correct position according to natural gas demand adjustment signal, so as to the tune that dams
The aperture for saving valve carries out Reasonable Regulation And Control in 0~100% scope, it is ensured that by regulating valve into the natural of engine air throttle of damming
Throughput, meets the requirement to natural gas demand when regulating and controlling gaseous mixture actual mixing ratio in natural gas engine.
Also, because engine electronic control unit can regulate and control to dam aperture of the regulating valve in the range of 0~100%,
Enable the natural gas engine electric-control system of present invention offer to by regulating valve into the day of engine air throttle of damming
Right throughput carries out the regulation and control of 0~100% scope, and also therefore, the natural gas engine electric-control system that the present invention is provided is to day
When gasoline air mixture ratio is regulated and controled in right gas engine, the homogeneous equivalent proportion burner of natural gas engine can not only be applied to
Condition, is equally applicable to its Lean Burn Operating.
Additionally, in the natural gas engine electric-control system that the present invention is provided, the The concrete specification of regulating valve of damming can be by this
Art personnel voluntarily select according to the size that natural gas engine is applicable generating set power, and for example natural gas engine is electromechanical
When control system is used for the natural gas engine of the small power generation unit of low power period such as 20kw power, regulating valve of damming can select most
Small guide vane circulates gas discharge the dam regulating valve equal with natural gas minimum essential requirement amount in natural gas engine.And,
Natural gas engine in end value operating mode be high load working condition or small load condition when, regulating valve of damming simultaneously need not accordingly be consolidated
It is set to standard-sized sheet or full off state, the natural gas demand adjustment signal energy that drive device sends according to engine electronic control unit
Enough apertures to regulating valve of damming regulate and control in 0~100% scope, to make to enter engine throttle by regulating valve of damming
The gas discharge of door can be regulated and controled in 0~100% scope.
Based on the technical scheme of above-mentioned natural gas engine electric-control system, the second aspect of the present invention provides a kind of thermoelectricity connection
Product system, the co-generation unit includes the natural gas engine electric-control system that above-mentioned technical proposal is provided.With prior art
Compare, the beneficial effect achieved by co-generation unit that the present invention is provided, the natural pneumoelectric provided with above-mentioned technical proposal
The control system beneficial effect to be reached is identical, will not be described here.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes a part of the invention, not
Constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structural representation of natural gas engine electric-control system one in the prior art；
Fig. 2 is the structural representation of natural gas engine electric-control system two in the prior art；
Fig. 3 is the structural representation of embodiment of the present invention natural gas engine electric-control system；
Fig. 4 is the structural profile schematic diagram of regulating valve of damming in the embodiment of the present invention；
Fig. 5 is the structural representation of the control valve stand that dams in the embodiment of the present invention；
Fig. 6 is the structural representation of plungers valve core in the embodiment of the present invention；
Fig. 7 is the structural representation of stepper motor in the embodiment of the present invention.
Reference：
1- natural gas air inlet pipes, 11- natural gas filters,
12- pressure reducers, 2- air intake ducts,
20- air inlet silencers, 21- air cleaners,
22- mass air flow sensor, 3- natural gas engines,
30- ignition coils, 31- engine air throttles,
32- proportional mixers, 33- inlet manifold,
34- exhaust manifolds, 35- triple mode catalytic converters,
36- exhaust silencers, 4- engine electronic control units,
41- natural gas temperature pressure sensors, 42- air inlet temperature/pressure sensors,
43- CMPS Camshaft Position Sensors, 44- crankshaft position sensors,
45- lambda sensors, 46- exhaust temperature sensors,
5- gas pressure force control valves, 6- combustion gas air throttles,
7- combustion gas bypass pipes, 8- dams regulating valve,
80- drive devices, 801- positioning ring grooves,
81- valve seats, 811- valve element guide pipes,
82- valve elements, 821- circular orientation structures,
9- safety valves.
Specific embodiment
For ease of understanding, with reference to Figure of description, to natural gas engine Electrical Control system provided in an embodiment of the present invention
System is described in detail.
Refering to Fig. 3 and Fig. 4, natural gas engine electric-control system provided in an embodiment of the present invention, including Motronic control maps control
Unit processed 4, is arranged on the regulating valve 8 of damming in the natural gas air inlet pipe 1 being connected with engine air throttle 31, and with the tune that dams
The drive device 80 of the drive connection of valve element 82 of valve 8 is saved, and drive device 80 is connected with the signal of engine electronic control unit 4,
The natural gas demand adjustment signal that drive device 80 sends according to engine electronic control unit 4 drives valve element 82 to move, and adjusts
Control aperture of the regulating valve 8 in 0~100% scope of damming.
In natural gas engine electric-control system provided in an embodiment of the present invention, regulating valve of damming 8 can be serially connected in naturally
In gas air inlet pipe 1, for example natural gas air inlet pipe 1 uses two-part structure, and damming, regulating valve 8 is docked with natural gas air inlet pipe 1
Both sides end faces flange is set, docked by flange and the fixation of natural gas air inlet pipe 1, and ensure that its joint face air-tightness is good；
Regulating valve of damming 8 can also be installed with the grafting of natural gas air inlet pipe 1, for example, set spliced eye in natural gas air inlet pipe 1, will be cut
Stream regulating valve 8 is plugged in natural gas air inlet pipe 1, and the valve element 82 of the regulating valve 8 that makes to dam is located in natural gas air inlet pipe 1, and with
Natural gas air inlet pipe 1 corresponds to the pipeline section of the valve element 82 of regulating valve 8 of damming as the valve seat 81 of regulating valve 8 of damming, and valve element 82 is used
The plungers valve core that can be matched with the inner tube of natural gas air inlet pipe 1, by valve element 82 with natural gas air inlet pipe 1 correspondence pipeline section it is relative
Motion, to regulating and controlling with the circulation area of the corresponding pipeline section of valve element 82 in natural gas air inlet pipe 1, so as to realize regulating valve 8 of damming
Aperture.Concatenated with natural gas air inlet pipe 1 when regulating valve 8 of damming or during grafting, the motion of the valve element 82 of regulating valve of damming 8 becomes
Change, in 0~100% range, realization 8 pairs of entrance of regulating valve of damming are started for the aperture of the regulating valve 8 that accordingly can regulate and control to dam
The regulation and control of gas discharge in machine air throttle 31.
In addition, drive device 80 can select automatically controlled mechanical mechanism, for example, it is provided with the reciprocating push rod of automatically controlled device
Formula mechanism, also can directly select motor, such as stepper motor.When drive device 80 is from push-down mechanism, drive device 80
With the drive connection of the valve element 82 of regulating valve 8 of damming, being fixedly connected for push rod end and valve element 82 is can behave as；And drive device
80 from motor when, drive device 80 and the drive connection of the valve element 82 of regulating valve 8 of damming can behave as motor output shaft and valve
Core 82 is fixedly connected.And it is above-mentioned be fixedly connected it is specific can select to be bonded connect, be threadedly coupled, welding and interference fit connection
Deng.
During specific implementation, according to 3 pairs of demands for entering natural gas air inflow in engine air throttle 31 of natural gas engine,
Engine electronic control unit 4 can be transmitted natural gas demand adjustment signal to drive device 80, make drive device 80 according to day
Right gas demand adjustment signal drives the valve element 82 of regulating valve 8 of damming to move to correct position, thus regulate and control to dam regulating valve 8 to
Suitable open position, realizes the 8 pairs of Effective Regulations for entering gas discharge in engine air throttle 31 of regulating valve that dam, it is ensured that logical
The gas discharge that regulating valve 8 of damming enters engine air throttle 31 is crossed, meets regulation and control gaseous mixture reality in natural gas engine 3
To the requirement of natural gas demand during air-fuel ratio.
Also, because engine electronic control unit 4 can regulate and control to dam the opening in the range of 0~100% of regulating valve 8
Degree so that natural gas engine electric-control system provided in an embodiment of the present invention can be to entering engine by regulating valve 8 of damming
The gas discharge of air throttle 31 carries out the regulation and control of 0~100% scope, also therefore, natural gas hair provided in an embodiment of the present invention
Motivation electric-control system can not only be applied to natural gas engine when gasoline air mixture ratio regulates and controls in natural gas engine 3
The homogeneous equivalent proportion combustion conditions of machine 3, are equally applicable to its Lean Burn Operating.
Additionally, in natural gas engine electric-control system provided in an embodiment of the present invention, the The concrete specification of regulating valve of damming 8
Can voluntarily be selected according to the size that natural gas engine 3 is applicable generating set power by those skilled in the art, such as natural gas
When engine electric-controlled system is used for the natural gas engine 3 of the small power generation unit of low power period such as 20kw power, regulation of damming
Valve 8 can select minimum aperture and circulate gas discharge the dam tune equal with natural gas minimum essential requirement amount in natural gas engine
Section valve.And, natural gas engine 3 in end value operating mode be high load working condition or small load condition when, regulating valve of damming 8 is simultaneously
Standard-sized sheet or full off state, the natural gas that drive device 80 sends according to engine electronic control unit 4 need not be accordingly fixed as
Demand adjustment signal can regulate and control to the aperture of regulating valve 8 of damming in 0~100% scope, to make by the tune that dams
Section valve 8 can be regulated and controled into the gas discharge of engine air throttle 31 in 0~100% scope.
In addition, natural gas engine electric-control system provided in an embodiment of the present invention, is sent out by engine electronic control unit 4
The natural gas demand adjustment signal of drive device 80 is delivered to, drive device 80 can be made to drive valve element 82 pairs to dam regulating valve 8
Aperture quickly regulated and controled, and utilize dam regulating valve 8 aperture change regulation and control enter engine air throttle 31 in it is natural
Throughput, improves natural gas engine electric-control system to entering the regulation and control speed of gas discharge in engine air throttle 31,
Also the natural gas quick response natural gas engine electric-control system control of which in natural gas air inlet pipe 1 is enable.
Additionally, when generating set carries out the test of the off-load of declared working condition 100%, the load change of generating set need to pass through
The closure of engine air throttle 31 is carried out, and in order to avoid natural gas engine 3 is flame-out and is maintained at the fluctuation of its rotating speed
In tolerance band, in natural gas engine electric-control system provided in an embodiment of the present invention, engine air throttle 31 can be without
Completely close, sent using engine electronic control unit 4 to the natural gas demand adjustment signal of drive device 80, make driving
It is 0 that device 80 drives the dam aperture of regulating valve 8 of the quick regulation and control of the valve element 82 of regulating valve 8 of damming, that is, the regulating valve 8 that makes to dam is fast
Speed cut-out natural gas air inlet pipe 1, " transient frequency difference and frequency of 100% anticlimax power are extensive generating set is easier satisfaction
The multiple time " this electrical performance indexes.Wherein, " transient frequency difference of 100% anticlimax power and frequency retrieval time " this electricity
Performance indications refer to：Generating set makes its load changing be zero when declared working condition is run, when testing the reaction of generating set
Between, determine that whether generating set can complete load dump, and maintain electric set electric supply frequency constant within the time of regulation
Ability.
You need to add is that, engine electronic control unit 4 (Electronic Control Unit, abbreviation ECU) is used for
Automatically controlling for natural gas engine 3 is realized, need to be believed with the engine air throttle 31 in natural gas engine 3 and each sensor
Number connection, each sensor includes：Natural gas temperature pressure sensor 41 for gathering natural gas temperature information and pressure information,
For gathering the air inlet pressure sensor 42 at inlet manifold 33, the cam axle position of the position signalling for gathering distribution cam axle
Sensor 43 is put, for the crankshaft position sensor 44 of collecting crankshaft rotational angle and engine rotational speed signal, for gathering day
The lambda sensor 45 of oxygen concentration and for gathering the emission temperature of natural gas engine 3 in the right emission of gas engine 3
Exhaust temperature sensor 46 of degree etc..Engine electronic control unit 4 by the comprehensive computing to each sensor feedback signal, and by its
Operation result is changed into adjustment signal, can run required each control parameter, such as air inlet by regulating and controlling natural gas engine 3
Pressure, time of ignition etc., it is ensured that the normal operation of natural gas engine 3.
It is noted that in the present embodiment, drive device 80 preferably uses stepper motor.The structure letter of stepper motor
Single, easy to use, the natural gas demand adjustment signal that can be sent engine electronic control unit 4 is converted to its output
The angular displacement of axle or displacement of the lines, make its output shaft drive valve element 82 to oppose and should move.And the output displacement of stepper motor, depend on
Pulse frequency and umber of pulse in natural gas demand adjustment signal, in the absence of cumulative errors so that under driving stepper motor
The amount of exercise of valve element 82 can accurately be measured.When engine electronic control unit 4 sends natural gas demand adjustment signal
During to stepper motor, stepper motor substep drives valve element 82 to move, can to the aperture of regulating valve 8 of damming its 0~100%
In the range of carry out accurate indexing regulation and control, improve natural gas engine electric-control system natural in engine air throttle 31 to entering
The regulation and control accuracy of throughput.
When in the present embodiment using stepper motor as drive device 80, stepper motor specifically can select displacement of the lines stepper motor
Or angular displacement stepper motor, and the difference of correspondence stepper motor output displacement, regulating valve 8 that what stepper motor can drive dam
The structure of valve element 82 is also corresponding different, and the valve seat construction of the regulating valve 8 of damming matched with valve element 82 is also differed.
It is described as follows so that stepper motor is from angular displacement stepper motor as an example.Drive device 80 selects angular displacement stepper motor
When, axis and the axis of natural gas air inlet pipe 1 of angular displacement stepper motor are vertically arranged, the regulating valve 8 of damming of its respective drive
Valve element 82 from match with the internal diameter of natural gas air inlet pipe 1 and can the axis of vertical natural gas air inlet pipe 1 rotation rounded tabs, this
Rounded tabs are set in the same direction with the cross section of natural gas air inlet pipe 1, and are fixedly connected with the output shaft of angular displacement stepper motor；Cut
The equal pipe of the valve seat from natural gas air inlet pipe 1 of regulating valve 8 is flowed, the two ends mouth of pipe of equal pipe is docked with natural gas air inlet pipe 1,
The output shaft that the side of equal pipe offers for angular displacement stepper motor stretches into the aperture being fixedly connected with rounded tabs；When angle position
During the output shaft rotation of walk stepper motor, rounded tabs are rotated therewith, realization dam regulating valve 8 aperture regulation and control.
It is described as follows so that stepper motor is from displacement of the lines stepper motor as an example.Refering to Fig. 4 and Fig. 5, in the present embodiment, step
When stepper motor selects displacement of the lines stepper motor, regulating valve of damming 8 includes：With the straight-through valve seat 81 being connected of natural gas air inlet pipe 1, valve
Seat 81 is provided with spool bore, and the end of the outer spool bore of valve seat 81 is provided with valve element guide pipe 811；The valve element 82 of regulating valve of damming 8 is post
Plug valve core, plungers valve core is inserted into spool bore, and plungers valve core is fixedly connected with the output shaft of displacement of the lines stepper motor.
Specifically, plungers valve core can be coaxially set with displacement of the lines stepper motor, also can vertical line displacement stepper motor
Axis is set, and being fixedly connected between plungers valve core and displacement of the lines stepper motor output shaft, specifically can by be bonded connect, screw thread
The modes such as connection, welding and interference fit are realized.In order to improve the installation positioning precision of plungers valve core, refering to Fig. 6 and Fig. 7,
The output shaft end of online displacement stepper motor also can be set positioning ring groove 801, and relative with positioning ring groove 801 in plungers valve core
Position circular orientation structure 821 is set, positioned by the fastening of circular orientation structure 821 and positioning ring groove 801.
When the motion of displacement of the lines driving stepper motor plungers valve core, during with the aperture for regulating and controlling regulating valve 8 of damming, if plungers valve core
End when not extending out valve element guide pipe 811 and entering the spool bore of valve seat 81, the aperture of regulating valve of damming 8 is 100%, if post
When the end of plug valve core moves to sealing chimeric with the spool bore of valve seat 81, the aperture of regulating valve of damming 8 is 0.
In addition, plungers valve core sealing chimeric with the spool bore of valve seat 81 for convenience, the end of plungers valve core can select half
Chondritic or arcuate structure, now, the bottom surface of the spool bore of valve seat 81 should be mutually matched with the end shape of plunger, with true
When guarantor's plungers valve core is chimeric with the spool bore sealing of valve seat 81, the aperture of regulating valve of damming 8 is 0.
The production assembling of regulating valve of damming for convenience 8, and regulating valve 8 of conveniently damming is matched somebody with somebody in natural gas air inlet pipe 1
Conjunction is used, and in embodiments of the present invention, valve seat 81 and the natural gas air inlet pipe 1 of regulating valve of damming 8 are integrally formed.
In above-described embodiment, when valve seat 81 and the natural gas air inlet pipe 1 of regulating valve 8 of damming are integrally formed, refering to Fig. 4 and
Fig. 5, it is contemplated that the shaping that matches of valve seat 81 and natural gas air inlet pipe 1, and dam the aperture of regulating valve 8 for 0 when, plungers valve core,
The air-tightness of valve seat 81 and natural gas air inlet pipe 1, the diameter of the spool bore of valve seat 81 should be slightly bigger than the interior of natural gas air inlet pipe 1
Footpath, the diameter of correspondence plungers valve core also should be slightly bigger than the internal diameter of natural gas air inlet pipe 1.
On the basis of above-described embodiment, with continued reference to Fig. 3, natural gas air inlet pipe 1 is provided with safety valve 9, and safety valve 9
It is connected with the signal of engine electronic control unit 4, engine electronic control unit 4 is in unusual service condition in natural gas engine 3
When, transmission makes safety valve 9 turn off the cut-off signals of natural gas air inlet pipe 1.Generally in the running of natural gas engine 3,
It is unavoidable that for example unusual service condition such as water temperature over-high, engine air throttle imbalance occurs, now by engine electronic control unit 4
Control to safety valve 9, being capable of direct fast shut-off natural gas air inlet pipe 1, it is to avoid natural gas continues into engine air throttle
In 31, the operation to natural gas engine brings security risk.
It is worth mentioning, natural gas engine electric-control system also includes proportional mixer 32, proportional mixer 32
Natural gas air inlet is connected with natural gas air inlet pipe 1, and the air inlet of proportional mixer 32 is connected with air intake duct 2,
The gas outlet of proportional mixer 32 connects with engine air throttle 31.Natural gas and air inlet in natural gas air inlet pipe 1
Air in pipe 2 was mixed beforehand through proportional mixer 32 before engine air throttle 31 is entered according to preset ratio
Close, it is possible to increase natural gas enters efficiency of combustion in natural gas engine 3 after engine air throttle 31, and sends out natural gas
The igniting of ignition coil 30 is safe and reliable to operation in motivation 3.
In above-described embodiment, air intake duct 2 is provided with mass air flow sensor 22, and mass air flow sensor 22 and Motronic control maps
The signal of control unit 4 is connected.According to 22 pairs of meterings for entering air mass flow in proportional mixer 32 of mass air flow sensor, can make
Determination of the engine electronic control unit 4 to natural gas demand adjustment signal is more accurate.In addition, in order to eliminate noise and
The air quality entered in natural gas engine 3 is improved, air inlet silencer 20 and air mistake are additionally provided with air intake duct 2
Filter 21.It should be noted that the erection sequence of air inlet silencer 20 and air cleaner 21 on air intake duct 2 is simultaneously
Restriction without sequencing.
Equally, in order to improve the quality of natural gas into natural gas engine 3, day is additionally provided with natural gas air inlet pipe 1
Right air filter 11.And, in order to ensure natural gas is using safety, pressure reducer 12 being additionally provided with natural gas air inlet pipe 1, can keep away
The gas pressure exempted from natural gas air inlet pipe road is excessive.
For the emission of purified natural gas engine 3, in above-described embodiment, the exhaust manifold of natural gas engine 3
34 are connected with triple mode catalytic converter 35, at the catalysis by triple mode catalytic converter 35 to the emission of natural gas engine 3
Reason, can vast scale reduction the emission of natural gas engine 3 in three kinds of major pollutants (hydrocarbon HC, carbon monoxide
CO and nitrogen oxide NOx).In addition, in order to eliminate noise, exhaust silencer is additionally provided with the exhaust side of triple mode catalytic converter 35
36。
It should be noted that exhaust manifold 34 is provided with the lambda sensor being connected with the signal of engine electronic control unit 4
45, the concentration of oxygen in the exhaust manifold 34 that engine electronic control unit 4 is detected according to lambda sensor 45 is generated corresponding
Natural gas demand adjustment signal.And, in the actual motion of natural gas engine 3, the basis of engine electronic control unit 4
The real-time concentration of oxygen in the exhaust manifold 34 that lambda sensor 45 is detected, can be dammed regulating valve 8 using drive device 80 pairs
Aperture carry out real-time monitoring, complete the accurate closed-loop control of Lambda parameters in natural gas engine 3, that is, realize natural
The accurate closed-loop control of air-fuel ratio in gas engine 3, so as to control the generation of noxious emission in natural gas engine 3, prevents
The severe exacerbation of NOx emission in natural gas engine 3.Lambda parameters refer to burning 1Kg natural gas effective supply air matter
The ratio of amount and air quality needed for 1Kg natural gases of burning completely in theory.When Lambda parameters are located near 1, ternary is urged
Changing converter 35 can carry out complete catalytic reaction to major pollutants in emission, improve its clean-up effect.
The embodiment of the present invention additionally provides a kind of co-generation unit, and the co-generation unit is carried including above-described embodiment
The natural gas engine electric-control system of confession.Natural gas engine electric-control system and above-described embodiment in the co-generation unit
In natural gas engine electric-control system have the advantage that identical, do not repeat herein.
In the description of above-mentioned implementation method, specific features, structure, material or feature can be at any one or many
Combined in an appropriate manner in individual embodiment or example.
The above, specific embodiment only of the invention, but protection scope of the present invention is not limited thereto, and it is any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of natural gas engine electric-control system, including engine electronic control unit, it is characterised in that the natural gas hair
Motivation electric-control system also includes：The regulating valve of damming in the natural gas air inlet pipe being connected with engine air throttle is arranged on, and
The drive device being connected with the valve element of the regulating valve of damming, the drive device and the engine electronic control unit
Signal is connected, and the natural gas demand adjustment signal that the drive device sends according to the engine electronic control unit drives
The valve core movement, dams aperture of the regulating valve in 0~100% scope described in regulation and control.
2. natural gas engine electric-control system according to claim 1, it is characterised in that
The drive device is displacement of the lines stepper motor；
The regulating valve of damming includes：The valve seat being connected is led directly to the natural gas air inlet pipe, the valve seat is provided with spool bore, institute
The end for stating the outer spool bore of valve seat is provided with valve element guide pipe；
The valve element of the regulating valve of damming is plungers valve core, and the plungers valve core is inserted into the spool bore, the plunger valve
Core is fixedly connected with the output shaft of the displacement of the lines stepper motor.
3. natural gas engine electric-control system according to claim 2, it is characterised in that the plungers valve core and the line
The output shaft of displacement stepper motor is coaxially set.
4. natural gas engine electric-control system according to claim 3, it is characterised in that the valve seat of the regulating valve of damming
It is integrally formed with the natural gas air inlet pipe.
5. the natural gas engine electric-control system according to claim any one of 2-4, it is characterised in that the plungers valve core
The end for inserting the spool bore is in hemispherical or arcuation.
6. natural gas engine electric-control system according to claim 1, it is characterised in that set in the natural gas air inlet pipe
There is safety valve, and the safety valve is connected with the engine electronic control unit signal；The engine electronic control unit
When natural gas engine is in unusual service condition, transmission makes the cut-off signals of natural gas air inlet pipe described in the safe valve breakdown.
7. natural gas engine electric-control system according to claim 1, it is characterised in that the natural gas engine Electrical Control
System also includes proportional mixer, and the natural gas air inlet of the proportional mixer is connected with the natural gas air inlet pipe,
The air inlet of the proportional mixer is connected with air intake duct, the gas outlet of the proportional mixer and the hair
Motivation air throttle is connected.
8. the natural gas engine electric-control system stated according to claim 6, it is characterised in that the air intake duct is provided with sky
Air-flow gauge, the mass air flow sensor is connected with the engine electronic control unit signal.
9. natural gas engine electric-control system according to claim 1, it is characterised in that the row of the natural gas engine
Gas manifold is provided with the lambda sensor being connected with the engine electronic control unit signal, the engine electronic control unit
According to the concentration of oxygen in the exhaust manifold that lambda sensor is detected, corresponding natural gas demand adjustment signal is generated.
10. a kind of co-generation unit, it is characterised in that including the natural gas engine any one of claim 1-9
Electric-control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710047736.8A CN106837566A (en) | 2017-01-20 | 2017-01-20 | A kind of natural gas engine electric-control system and co-generation unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710047736.8A CN106837566A (en) | 2017-01-20 | 2017-01-20 | A kind of natural gas engine electric-control system and co-generation unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106837566A true CN106837566A (en) | 2017-06-13 |
Family
ID=59120898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710047736.8A Pending CN106837566A (en) | 2017-01-20 | 2017-01-20 | A kind of natural gas engine electric-control system and co-generation unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106837566A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478452A (en) * | 2017-07-11 | 2017-12-15 | 新奥（中国）燃气投资有限公司 | The method of testing of cogeneration units |
| CN111102067A (en) * | 2019-12-30 | 2020-05-05 | 湖南省力宇燃气动力有限公司 | Gas generator set |
| CN112523882A (en) * | 2020-11-09 | 2021-03-19 | 广西玉柴机器股份有限公司 | Fuel control device and fuel control method of gas engine air inlet pressure closed loop |
| CN114508448A (en) * | 2020-11-17 | 2022-05-17 | 华益机电有限公司 | Double-fuel gas supply system with stepping motor |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2752464Y (en) * | 2004-12-24 | 2006-01-18 | 中国船舶重工集团公司第七一一研究所 | Gas engine fuel providing mechanism |
| CN2918767Y (en) * | 2005-12-15 | 2007-07-04 | 东风南充汽车有限公司 | Natural gas single fuel supercharging engine |
| CN101868606A (en) * | 2007-09-21 | 2010-10-20 | Mtu腓特烈港有限责任公司 | Method for controlling a stationary gas motor |
| CN202441501U (en) * | 2012-03-02 | 2012-09-19 | 中国石油天然气集团公司 | Air-fuel ratio control system for gas engine |
| JP2015137579A (en) * | 2014-01-22 | 2015-07-30 | 株式会社デンソー | Control device of internal combustion engine |
| CN105587429A (en) * | 2015-12-30 | 2016-05-18 | 贵州大学 | Gas supply system for gas and coke-oven gas cofiring engine and gas supply method of gas supply system |
| CN105973607A (en) * | 2016-06-28 | 2016-09-28 | 哈尔滨工程大学 | Intelligent monitoring segmented voltage-regulating gas supply system for natural gas engine experiment table |
| CN106224130A (en) * | 2016-10-08 | 2016-12-14 | 河南柴油机重工有限责任公司 | A kind of V-type integration natural gas compressor auxiliary fuel supply-system and method |
-
2017
- 2017-01-20 CN CN201710047736.8A patent/CN106837566A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2752464Y (en) * | 2004-12-24 | 2006-01-18 | 中国船舶重工集团公司第七一一研究所 | Gas engine fuel providing mechanism |
| CN2918767Y (en) * | 2005-12-15 | 2007-07-04 | 东风南充汽车有限公司 | Natural gas single fuel supercharging engine |
| CN101868606A (en) * | 2007-09-21 | 2010-10-20 | Mtu腓特烈港有限责任公司 | Method for controlling a stationary gas motor |
| CN202441501U (en) * | 2012-03-02 | 2012-09-19 | 中国石油天然气集团公司 | Air-fuel ratio control system for gas engine |
| JP2015137579A (en) * | 2014-01-22 | 2015-07-30 | 株式会社デンソー | Control device of internal combustion engine |
| CN105587429A (en) * | 2015-12-30 | 2016-05-18 | 贵州大学 | Gas supply system for gas and coke-oven gas cofiring engine and gas supply method of gas supply system |
| CN105973607A (en) * | 2016-06-28 | 2016-09-28 | 哈尔滨工程大学 | Intelligent monitoring segmented voltage-regulating gas supply system for natural gas engine experiment table |
| CN106224130A (en) * | 2016-10-08 | 2016-12-14 | 河南柴油机重工有限责任公司 | A kind of V-type integration natural gas compressor auxiliary fuel supply-system and method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478452A (en) * | 2017-07-11 | 2017-12-15 | 新奥（中国）燃气投资有限公司 | The method of testing of cogeneration units |
| CN107478452B (en) * | 2017-07-11 | 2020-04-10 | 新奥（中国）燃气投资有限公司 | Test method of cogeneration unit |
| CN111102067A (en) * | 2019-12-30 | 2020-05-05 | 湖南省力宇燃气动力有限公司 | Gas generator set |
| CN112523882A (en) * | 2020-11-09 | 2021-03-19 | 广西玉柴机器股份有限公司 | Fuel control device and fuel control method of gas engine air inlet pressure closed loop |
| CN112523882B (en) * | 2020-11-09 | 2023-04-28 | 广西玉柴船电动力有限公司 | Fuel control method for gas engine air inlet pressure closed loop |
| CN114508448A (en) * | 2020-11-17 | 2022-05-17 | 华益机电有限公司 | Double-fuel gas supply system with stepping motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106837566A (en) | A kind of natural gas engine electric-control system and co-generation unit | |
| CA2154011C (en) | Exhaust gas recirculation system for a compression ignition engine and a method of controlling exhaust gas recirculation in a compression ignition engine | |
| US8005603B2 (en) | Fuel control system and method for gas engines | |
| US8433499B2 (en) | Apparatus for detecting imbalance abnormality in air-fuel ratio between cylinders | |
| CN1070262C (en) | Control system for internal combustion engines | |
| CN1880744B (en) | System for controlling exhaust emissions produced by an internal combustion engine | |
| DK2652293T3 (en) | METHOD OF OPERATING A Piston Incinerator in Transient Load Change, a Control System to Operate the Function of an Internal Combustion Engine, and a Piston Engine | |
| EP1358399B1 (en) | A device and a method for controlling the fuel-air ratio | |
| WO2008135715A1 (en) | Control assembly | |
| US9518519B2 (en) | Transient control of exhaust gas recirculation systems through mixer control valves | |
| CN104641098A (en) | Gas mixer for internal combustion engines | |
| CN112855358A (en) | Special gas engine control system for gas heat pump | |
| KR101181814B1 (en) | Method for controlling the combustible air/fuel mixture located inside the combustion chamber of an internal combustion engine | |
| RU106662U1 (en) | GAS PISTON ENERGY INSTALLATION | |
| FI125390B (en) | Procedure for operating an ottoman engine and an ottoman engine | |
| Felayati et al. | Investigation of the effect of natural gas injection timing on dual-fuel engine emissions using split injection strategies | |
| CN210033646U (en) | Double-throttle engine control system applied to generator set | |
| US20080104944A1 (en) | Engine emissions control system | |
| EP2642103B1 (en) | Exhaust-gas recirculation system and method for exhaust-gas recirculation | |
| US20140261311A1 (en) | Fuel mixer | |
| RU2319846C1 (en) | Method of delivery of fuel gas into operating cylinders of ags-diesel engine | |
| CN113107722B (en) | Gas inlet mechanism for improving quality of mixed gas formed by high-power gas machine and control method | |
| WO2015046657A1 (en) | Homogeneous charge compression ignition engine system | |
| RU22638U1 (en) | STABILIZER OF COMPOSITION OF FUEL MIXTURE OF CARBURETTOR ENGINES | |
| EP2746560B1 (en) | Gas mixer for internal combustion engine |
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: 20170613 |
|
| RJ01 | Rejection of invention patent application after publication |