CN209704729U - A kind of double-fuel diesel engine oil circuit improvement structure - Google Patents

Abstract

The utility model discloses a kind of double-fuel diesel engine oil circuits to improve structure, it is used to control the Engine Injection Mass that diesel dual-fuel mixes burning mode using the Electrocontrolled high-pressure high speed electromagnetic valve gear with pressure sensor feedback, control suitable for diesel pumps all in addition to high-pressure common-rail oil pump, keep original mechanical pump fuel system structure completely under pure diesel fuel mode, it ensure that the runnability of original diesel fuel mode engine, transient state adjusts diesel oil distributive value under different operating conditions, reach the accurate control of engine diesel oil distributive value under different operating conditions, the reduction of distributive value can also flexibly be controlled, avoid the limitation of mechanical pump minimum fuel, it realizes and is ignited the function of natural gas based on the micro diesel injection of all mechanical pumps, it improves diesel gas double fuel and mixes the substitution rate for burning natural gas, come using automatically controlled high speed and high pressure solenoid valve End of injection is controlled, fuel oil injection can be cut off by quick overflow, avoids the ideal oil spout figure for generating oil spout cavitation pitting.

Description

A kind of double-fuel diesel engine oil circuit improvement structure

Technical field

The utility model relates to diesel engine technologies field, in particular to a kind of double-fuel diesel engine oil circuit improves Structure.

Background technique

With increasingly developed, the transportation and communication of China's economy, the ownership of engineering machinery and ship rapidly increases, Lead to that fuel oil is in short supply and environmental pollution is got worse, therefore a clean important side for becoming internal combustion engine research instead of fuel To.Natural gas just has the advantages that rich reserves, octane number is high, and pollution is small, technology maturation as substitute Fuel of Internal Combustion Engine, especially The yield of natural gas is significantly increased in the application of the production technique of shale gas.The internal combustion engine of development and application gas fuel is solution The certainly fuel oil effective ways in short supply with environmental pollution.Diesel engine big in particular for fuel consumption, seriously polluted uses Natural Gas & Diesel Dual Fuel Engine mixes the internal-combustion engine system of burning, and fuel can be made diversified, reduce fuel cost, reduce exhaust emission, It has important practical significance.

Diesel gas or LNG (Liquefied Natural Gas, liquefied natural gas) double fuel co-combustion system mode are It can work under original use diesel oil operating mode, and the mould that mix burning using natural gas and diesel oil can be switched by system It works under formula.Therefore, control system is required to keep the operating mode of original diesel oil constant, while can be transformed by switching Diesel gas double fuel mixes the mode of burning, and both of which can not influence engine stabilizer according to switching condition free switching Operation.Diesel gas double fuel blending and burning technology mainly has high pressure direct injection and diesel oil ignited technology two schemes in cylinder.It is high in cylinder Straightening spray technique is can be simultaneously to inner cylinder direct injection bavin oil and gas by integrated fuel injection device.But due to The manufacture of the direct-injection nozzle of high-pressure diesel and natural gas is complicated in cylinder, and service life is short, expensive, does not obtain pushing away for large area Wide application.At present using the commonplace of diesel oil ignited technical solution.Diesel oil ignited technology is ejected by as few as possible Diesel oil compression ignition is worked in engine with lighting natural gas in suction cylinder, is burnt with gas fuel and is replaced former diesel oil combustion in need Material.For diesel oil ignited natural gas engine, under the premise of guaranteeing engine performance, higher substitute gas is realized Rate is the main target of dual fuel engine research and development, and due to engine operation condition complexity, the natural gas under different operating conditions is replaced It is also different for rate, therefore reasonably optimizing improves the important development goal that substitution rate is dual fuel engine, it is therefore desirable to double combustions The diesel injection and natural gas injection for expecting engine are accurately controlled, the effective and reasonable raising substitution rate of ability.

Diesel pump is one of the important component of diesel engine supply and jet control system, can be sent out according to different diesel oil The requirement of motivation uses different types of diesel pump, leads diesel pump to be applied at present and is divided into mechanical inline pump, electric control linearly arranged pump, Dispensing pump, electronic control dispensing pump, electronically controlled unit pump and high voltage common rail pump.Mechanical inline pump, electric control linearly arranged pump, dispensing pump are automatically controlled Dispensing pump, electronically controlled unit pump are all to spray work of burning in diesel oil to engine by hydraulic injection device, belong to mechanical pump scope Diesel pump.High voltage common rail pump is to spray work of burning in diesel oil to engine by electric-controlled fuel injector, belongs to electronic control diesel oil Pump.Diesel oil Injection Control for the dual fuel engine using different type diesel pump is Diesel-CNG dual fuel engine Antecedent basis.

Such as patent (patent name: the control system and its control method of the oil gas dual-fuel engine of mechanical oil pump feed；Specially Sharp publication number: CN104033256A) propose a kind of control system and control method for double-fuel diesel pump, but this is existing Technology the problem is that: 1) this control system can not carry out diesel gas double fuel fortune under the full working scope of engine Row.According to the mechanical design structure of mechanical pump, start and idling operation under diesel oil supply can not pass through the oil of oil pump Door pull rod adjustment, causing diesel gas double fuel minimum diesel injection amount is that under idling conditions therefore diesel oil distributive value causes Under idling and running on the lower load the substitution rate of diesel gas double fuel is not high, strong influence system it is economical.

2) it is unable to improve and solves injection pump cavitation pitting that mechanical pump structure designs itself and injection tubing pressure oscillations cause After end of injection secondary injection, cause fuel consumption high, pollutant emission is high.

3) mechanical structure adjusts oil mass, and structure is complicated, and mechanical engagement and abrasion cause distributive value deviation big, while transient state is rung Should be slow, it is unable to satisfy engine stabilizer service requirement.Engine needs oil injection time and distributive value in the state of operating Transient response can just be such that engine stabilizer operates.Since the dynamic response of mechanical structure is slow, the transient response of distributive value is caused not It is able to satisfy the requirement of engine, will cause the unstable and performance decline of engine operating.

4) system structure complexity needs to install additional CMPS Camshaft Position Sensor 13 and crankshaft position sensor 14, while mating need It to install cam signal disk additional on camshaft, install crankshaft signal disk additional on crankshaft, make system structure and control more complicated.Cause System control needs the job order signal of each cylinder of engine and each cylinder working status signal therefore need to install cam axle position additional Sensor and cam signal disk are set for sentencing cylinder, installs crankshaft position sensor and crankshaft signal disk additional for calculating engine speed With the corresponding position of engine tope center.The program causes system structure and control complicated.

5) system cost is high, and due to system structure complexity, causing system to install additional, component is more, and system cost is high.

For another example patent publication No. is that the utility model patent of CN1570366A proposes a kind of electric controlled in-line combined pump/valve-pipe- Nozzle injection system is complete automatically controlledization to inline pump, is a kind of electric control pump of brand-new design, poor with the structure of original mechanical pump Different huge, the system that the diesel dual-fuel based on mechanical oil pump feed mixes the engine of burning mode mainly consider to be pumped in existing machinery The amount of injection for reducing diesel oil how is controlled in the system of fuel feeding, the natural gas acting of injection is lighted, to keep original diesel engine The output power and torque of machine.Normal operation of original diesel engine under pure diesel fuel mode is also kept simultaneously.Therefore it needs To controlling on the basis of original diesel engine, change corresponding construction and component are reduced to the greatest extent, to reach in original diesel fuel mode and mix The normal operation of burning mode and the free switching of both of which are a kind of electric control pump of brand-new design, by electronic fuel injection Measure the mechanical oil supply structure for original mechanical pump.

Therefore the utility model proposes a kind of double-fuel diesel engine oil circuits to improve structure, using with pressure sensor The Electrocontrolled high-pressure high speed electromagnetic valve gear of feedback is for controlling the Engine Injection Mass that diesel dual-fuel mixes burning mode, suitable for removing The control of all diesel pumps outside high-pressure common-rail oil pump, this structure and original pure diesel systems are parallel organization, in pure diesel fuel mode It keeps original mechanical pump fuel system structure completely down, ensure that the runnability of original diesel fuel mode engine, in diesel oil day Right gas double fuel is mixed under burning mode through the control of the Electrocontrolled high-pressure high speed electromagnetic valve gear with pressure sensor feedback, is adjusted Engine transient state under different operating conditions adjusts diesel oil distributive value, reaches engine diesel oil distributive value under different operating conditions Accurate control, can also flexibly control the reduction of distributive value, avoid the limitation of mechanical pump minimum fuel, realize based on all The micro diesel injection of mechanical pump is ignited the function of natural gas, is improved diesel gas double fuel and is mixed the substitution rate for burning natural gas.Make End of injection is controlled with automatically controlled high speed and high pressure solenoid valve, fuel oil injection can be cut off by quick overflow, avoids generating oil spout The ideal oil spout figure of cavitation pitting, this structure have strong applicability, and structure is simple, and transient control is accurate, the distinguishing features such as at low cost.

Utility model content

In view of the above-mentioned problems, the purpose of this utility model is that proposing that a kind of double-fuel diesel engine oil circuit improves knot Structure has strong applicability, and structure is simple, and transient control is accurate, the distinguishing features such as at low cost.

The utility model solves technical solution used by above-mentioned technical problem: a kind of double-fuel diesel engine oil circuit Improve structure characterized by comprising engine, battery, fuel tank, mechanical diesel pump, high-pressure oil pipe, overflow oil pipe, electricity Control high-voltage high-speed solenoid valve, fuel pressure transmitter, atomizer, accelerator rod position sensor and control system, the fuel oil Case connects the oil inlet of the mechanical diesel pump by high-pressure oil pipe, and the oil outlet of the machinery diesel pump is connected by high-pressure oil pipe One end of the fuel pressure transmitter is connect, the other end of the fuel pressure transmitter connects the Electrocontrolled high-pressure high speed electromagnetic The oil outlet of the oil inlet of valve, the Electrocontrolled high-pressure high-speed electromagnetic valve connects the atomizer by high-pressure oil pipe, described automatically controlled The overflow hydraulic fluid port of high-voltage high-speed solenoid valve connects the fuel tank；

The control system includes: ECU controller, change-over switch, antenna, mobile terminal, PC terminal, Cloud Server, institute The input/output terminal for stating ECU controller connects the change-over switch, and the change-over switch is separately connected described by CAN bus Fuel pressure transmitter, Electrocontrolled high-pressure high-speed electromagnetic valve, accelerator rod position sensor, the ECU controller by antenna without Line is connected to the mobile terminal and PC terminal, carries out communication company by Cloud Server between the mobile terminal and PC terminal It connects；

The battery is respectively the fuel pressure transmitter, Electrocontrolled high-pressure high-speed electromagnetic valve, accelerator rod position biography Sensor, ECU controller, change-over switch provide operating voltage.

Further, water temperature sensor is also equipped on the engine, the water temperature sensor passes through the change-over switch The ECU controller is connected, the battery is water temperature sensor power supply.

Further, the ECU controller uses MC9S12.

Further, the mechanical diesel pump is mechanical inline pump, electric control linearly arranged pump, dispensing pump, electronic control dispensing pump, automatically controlled list One of body pump.

Utility model has the advantages that 1) the utility model is to be completely independent structure, original diesel engine is not influenced Air inlet, fuel feeding, burning and exhaust system, guarantee the operation of original diesel fuel mode engine.

2) the utility model can be adapted for all diesel pumps in addition to high-pressure common rail jet pump, to different types of machinery What is pumped is adaptable, and the utility model is to install Electrocontrolled high-pressure additional by the high pressure oil pipeline between mechanical diesel pump and fuel injector High-speed electromagnetic valve controls the amount of injection of diesel oil, does not carry out any change to original diesel oil mechanical pump, still maintains original bavin The characteristic of oil pump, therefore to any diesel pump for controlling diesel injection amount using fuel-injection pressure, the utility model It is applicable in.

3) the utility model can carry out diesel gas double fuel operation under the full working scope of engine, improve substitution Rate.It, can be under any operating condition by the control of Electrocontrolled high-pressure high-speed electromagnetic valve according to the feedback signal of fuel pressure transmitter Control is adjusted to diesel gas double-fuel diesel the amount of injection, improves the comprehensive substitution of full working scope of diesel gas double fuel Rate.

4) the utility model can solve the injection pump cavitation pitting and injection tubing pressure that mechanical diesel oil pump configuration designs itself The secondary injection of after end of injection caused by concussion reduces fuel consumption and pollutant emission.Tthe utility model system passes through control The unlatching of Electrocontrolled high-pressure high-speed electromagnetic valve processed, quickly makes fuel overflow, quickly reduces fuel pressure, avoids high pressure fuel to spray The cavitation pitting of oil pump and injection tubing generate pressure oscillations improve making for diesel pump to avoid the cavitation pitting to diesel pump With the service life, while after end of injection being avoided, the secondary injection as caused by the concussion of oily overpressure reduces the consumption of fuel oil, Also it has been correspondingly improved the substitution rate of gas fuel.

5) the utility model uses the control of Electrocontrolled high-pressure high-speed electromagnetic valve, has and accurately controls to the transient state of fuel injection amount System.Avoid the labyrinth of mechanical structure adjustment distributive value and since mechanical engagement and abrasion cause distributive value deviation greatly and Transient response is slow and each non-uniform problem of cylinder distributive value, has ensured the equal of Diesel-CNG dual fuel engine runnability Even property, stability and consistency.

6) Tthe utility model system is at low cost.Due to system structure exquisiteness, complicated installation component is avoided, can reduce and be Maintenance cost in the cost and use process of the components of system.

7) Tthe utility model system has long range positioning, calibration and diagnostic function, provides cloud service.This system is internally integrated GPS and gsm module can position vehicle, can be realized long-range with system ECU controller telecommunication by gsm module Calibration and system diagnostics function simultaneously provide maintenance service to client by the cloud platform at the end PC.

Detailed description of the invention

It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art Under the premise of labour, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is the double-fuel diesel engine system structure diagram of the utility model；

Fig. 2 is that the oil circuit of the utility model improves structural schematic diagram.

Wherein: 1, storage cylinder；2, bottle valve；3, gas filter；4, pressure reducer；5, jet common rail assembly；6, jet temperature Spend pressure sensor；7, air nozzle；8, mixer；9, connecting flange 10, air inlet temperature/pressure sensor；11, throttle position Sensor；12, electronic air throttle body assembly；13, turbocharger；14, air filter；15, Electrocontrolled high-pressure high-speed electromagnetic valve；16, Overflow oil pipe；17, fuel pressure transmitter；18, mechanical diesel pump；19, draw rod positions sensor；20, exhaust pipe；21, it sprays Oil nozzle；22, fuel tank；23, water temperature sensor；24, lambda sensor；25, exhaust gas temperature sensor；26, change-over switch；27,ECU Controller；28, antenna；29 mobile terminals；30, diagnosis terminal；31 Cloud Servers；32, engine；33, battery；34, air inlet Manifold；35 fuel gas conduits；36, high-pressure oil pipe；37, CAN bus.

Specific embodiment

The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical Novel protected range.

It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.

As shown in Figure 1, the utility model is for the Diesel-CNG dual fuel engine system based on mechanical oil pump feed A kind of oil circuit proposed improves structure, which includes gas burning system and fuel system, the gas burning system Include: storage cylinder, bottle valve, gas filter, pressure reducer, jet common rail assembly, jet temperature pressure sensor, air nozzle, Mixer, air filter, turbocharger, electronic air throttle body assembly, air inlet temperature/pressure sensor, throttle position sensing Device, fuel gas conduit, inlet manifold, exhaust pipe, exhaust gas temperature sensor, lambda sensor, the bottle valve are mounted on the storage cylinder Bottleneck on, the fuel gas bottle connects the gas filter by fuel gas conduit, and the gas filter passes through fuel gas conduit and connects The pressure reducer, the pressure reducer connect the jet common rail assembly by fuel gas conduit, and the jet common rail assembly includes air inlet General pipeline and outlet general pipeline, multiple air nozzle parallel side-by-sides are mounted between the inlet manifold and outlet general pipeline, it is described go out Gas general pipeline is connected to mixer by fuel gas conduit, and the air filter connects the turbocharger, the turbocharger connection The electronic air throttle body assembly, the electronic throttle assembly are connect by flange with the mixer, and the mixer is logical Cross the air inlet that inlet manifold is connected to engine, wherein throttle position biography is installed on the electronic air throttle body assembly Sensor is provided with air inlet temperature/pressure sensor, the hair on the pipeline between the electronic air throttle body assembly and mixer The exhaust outlet of motivation connects the exhaust pipe, and the lambda sensor and exhaust gas temperature sensor are mounted on close on the exhaust pipe At air exit, lambda sensor is for measuring engine operation air-fuel ratio, and exhaust gas temperature sensor is for measuring engine exhaust Temperature, arrange warm protection, the purpose for arranging temperature protection is delivery temperature when reducing engine operation, after detection row's temperature, Row's temperature protection control is realized by reducing diesel oil substitution rate r, reducing total fuel injection quantity or being switched to pure diesel fuel mode, such as It carries out arranging warm protection more than 580 DEG C in the subsequent row's temperature of turbocharger (whirlpool heel row temperature).

It is the improvement made for fuel system that the oil circuit, which improves structure, a kind of double-fuel diesel engine oil circuit improvement knot Structure characterized by comprising engine, battery, fuel tank, mechanical diesel pump, high-pressure oil pipe, overflow oil pipe, Electrocontrolled high-pressure High-speed electromagnetic valve, fuel pressure transmitter, atomizer, accelerator rod position sensor and control system, the fuel tank pass through High-pressure oil pipe connects the oil inlet of the mechanical diesel pump, and the oil outlet of the machinery diesel pump passes through described in high-pressure oil pipe connection One end of fuel pressure transmitter, the other end of the fuel pressure transmitter connect the Electrocontrolled high-pressure high-speed electromagnetic valve into The oil outlet of hydraulic fluid port, the Electrocontrolled high-pressure high-speed electromagnetic valve connects the atomizer by high-pressure oil pipe, and the Electrocontrolled high-pressure is high The overflow hydraulic fluid port of fast solenoid valve connects the fuel tank；Using fuel pressure transmitter for sentencing cylinder, while tubing pressure is detected, And using the pressure detecting signal of every cylinder as fiducial time, the revolving speed of engine is calculated.Tthe utility model system uses fuel oil pressure Force snesor is separately mounted on mechanical diesel pump to the oil pipe between fuel injector, when fuel pressure transmitter detects that signal produces It is raw, that is, indicate that this cylinder will do work state, while can calculate and work as according to the signal interval of every cylinder fuel pressure transmitter The revolving speed of front engine, without installing CMPS Camshaft Position Sensor and crankshaft position sensor and mating installation cam additional Signal panels and crankshaft signal disk etc.；

The control system includes: ECU controller, change-over switch, antenna, mobile terminal, PC terminal, Cloud Server, institute The input/output terminal for stating ECU controller connects the change-over switch, and the change-over switch is separately connected described by CAN bus Fuel pressure transmitter, Electrocontrolled high-pressure high-speed electromagnetic valve, accelerator rod position sensor, bottle valve, jet temperature pressure sensing Device, air nozzle, air inlet temperature/pressure sensor, throttle position sensor, exhaust gas temperature sensor, lambda sensor are to realize number It is executed according to receiving with signal, the ECU controller is connected to the mobile terminal and PC terminal, the movement by antenna wireless Communication connection is carried out by Cloud Server between terminal and PC terminal；It is also integrated with GPS and gsm module in the control system, it can Vehicle is positioned, long-range calibration and system diagnostics function can be realized with system ECU controller telecommunication by gsm module Can and maintenance service be provided to client by the cloud platform at the end PC.

The battery is respectively the fuel pressure transmitter, Electrocontrolled high-pressure high-speed electromagnetic valve, accelerator rod position biography Sensor, bottle valve, jet temperature pressure sensor, air nozzle, air inlet temperature/pressure sensor, throttle position sensor, row Gas temperature sensor, lambda sensor, ECU controller, change-over switch provide operating voltage.

Further, water temperature sensor is also equipped on the engine, the water temperature sensor passes through the change-over switch The ECU controller is connected, the battery is water temperature sensor power supply.

Further, the battery uses lithium battery.

Further, storage has natural gas or liquefied natural gas in the storage cylinder.

Further, the mechanical diesel pump is mechanical inline pump, electric control linearly arranged pump, dispensing pump, electronic control dispensing pump, automatically controlled list One of body pump.

The workflow of dual fuel engine system is as follows:

Step S1: whether Diesel-CNG dual fuel engine system of the detection based on mechanical oil pump feed be working properly；

Which kind of step S2: worked by change-over switch detection system in operating mode, pure fuel oil service mode or fuel oil/combustion Gas double fuel operating mode；

Step S3: under pure fuel oil service mode, distributive value is controlled by mechanical pump and fuel injector；

Step S4: under oil and gas double fuel operating mode, ECU controller is special using the fuel feeding of mechanical diesel pump Property MAP, is calculated pilot fuel amount and gas quantity in conjunction with the fuel oil substitution rate MAP of setting, after obtaining pilot fuel amount, passes through The feedback signal of fuel pressure transmitter controls Electrocontrolled high-pressure high-speed electromagnetic valve, sprays by fuel injector, actual to obtain Pilot fuel amount, wherein gas quantity is controlled by combustion gas mouth, and air capacity passes through the throttle opening control of electronic air throttle body assembly It makes and realizes, to obtain ideal air-fuel ratio.Wherein diesel oil/combustion gas double fuel operating mode condition mainly has: (1) diesel oil is sent out The water temperature of motivation is in OK range, is greater than the overtemperature (such as 93 DEG C) that setting low temperature (such as 60 DEG C) is less than setting simultaneously, temperature Spending high or relatively low engine should not all work in dual fuel mode, and (2) engine speed meets switching condition, such as larger than 1000r/min, the signal of (3) jet temperature pressure sensor show that the amount of storage of the combustion gas of storage cylinder meets engine and enters bavin Oil/combustion gas double fuel operating mode operation, the voltage of (4) battery meet normal running (operation) conditions, and battery not start by power shortage, (5) Machine control system is with the presence or absence of failure etc..

Further, fuel oil substitution rate formula Qdiesel=(1-r) × Q and Qgas=r × Q, calculates separately and ignites Diesel oil amount Qdiesel and gaseous fuel quantity Qgas.

Further, the size of the throttle opening is determined by air capacity, and air capacity is according to known gas quantity, then passes through Air-fuel ratio is calculated.

Further, the measurement of the air capacity passes through the air inflow model meter of air inlet temperature/pressure sensor combination engine It obtains, forms closed-loop control system between the air inlet temperature/pressure sensor, electronic air throttle body assembly and ECU controller System.

Further, the air-fuel ratio is calculated with following formula: Ga=ρ Vc η v

In formula: Ga-air quality；

ρ --- the atmospheric density (kg/m3) in air inlet pipe；

Vc --- volume of cylinder (m3)；

η v --- volumetric efficiency.

Perfect gas equation ρ=P*M/ (R*T) substitution above formula is obtained:

C=Vc/R in formula is constant for specific model；

M --- be air molecule amount (kg/mol)；

R --- gas constant, R=8.314J/mol*K；

P --- air inlet pipe air absolute pressure (kPa)；

T --- air inlet pipe air absolute temperature (K).

It can be seen that ECU controller can be according to cylinder target inlet air quality Ga, air inlet temperature after as long as volumetric efficiency determines It spends T and calculates target inlet air manifold absolute pressure P.Volumetric efficiency is determined by engine calibrating test.According to setting (calibration) Target air-fuel ratio carries out the closed loop feedback amendment of pilot fuel amount and gaseous fuel quantity, by adjusting right amount of fuel and gas is drawn Fuel quantity keeps the actual air-fuel ratio of engine operation consistent with target air-fuel ratio, and obtains final pilot fuel amount and gas Fuel quantity.

Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new The range of each embodiment technical solution of type.

Claims (4)

1. a kind of double-fuel diesel engine oil circuit improves structure characterized by comprising engine, battery, fuel tank, Mechanical diesel pump, high-pressure oil pipe, overflow oil pipe, Electrocontrolled high-pressure high-speed electromagnetic valve, fuel pressure transmitter, atomizer, throttle are drawn Bar position sensor and control system, the fuel tank connects the oil inlet of the mechanical diesel pump by high-pressure oil pipe, described The oil outlet of mechanical diesel pump connects one end of the fuel pressure transmitter, the fuel pressure transmitter by high-pressure oil pipe The other end connect the oil inlet of the Electrocontrolled high-pressure high-speed electromagnetic valve, the oil outlet of the Electrocontrolled high-pressure high-speed electromagnetic valve passes through High-pressure oil pipe connects the atomizer, and the overflow hydraulic fluid port of the Electrocontrolled high-pressure high-speed electromagnetic valve connects the fuel tank；

The control system includes: ECU controller, change-over switch, antenna, mobile terminal, PC terminal, Cloud Server, the ECU The input/output terminal of controller connects the change-over switch, and the change-over switch is separately connected the fuel oil pressure by CAN bus Force snesor, Electrocontrolled high-pressure high-speed electromagnetic valve, accelerator rod position sensor, the ECU controller are connected by antenna wireless To the mobile terminal and PC terminal, communication connection is carried out by Cloud Server between the mobile terminal and PC terminal；

The battery be respectively the fuel pressure transmitter, Electrocontrolled high-pressure high-speed electromagnetic valve, accelerator rod position sensor, ECU controller, change-over switch provide operating voltage.

2. a kind of double-fuel diesel engine oil circuit according to claim 1 improves structure, which is characterized in that described to start Water temperature sensor is also equipped on machine, the water temperature sensor connects the ECU controller, the storage by the change-over switch Battery is water temperature sensor power supply.

3. a kind of double-fuel diesel engine oil circuit according to claim 1 improves structure, which is characterized in that the ECU Controller uses MC9S12.

4. a kind of double-fuel diesel engine oil circuit according to claim 1 improves structure, which is characterized in that the machinery Diesel pump is mechanical inline pump, electric control linearly arranged pump, dispensing pump, electronic control dispensing pump, one of electronically controlled unit pump.