CN115898720A - Method and apparatus for fuel heating for dual fuel engine - Google Patents
Method and apparatus for fuel heating for dual fuel engine Download PDFInfo
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- CN115898720A CN115898720A CN202310006444.5A CN202310006444A CN115898720A CN 115898720 A CN115898720 A CN 115898720A CN 202310006444 A CN202310006444 A CN 202310006444A CN 115898720 A CN115898720 A CN 115898720A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- 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
Abstract
The application provides a method and a device for heating fuel of a dual-fuel engine, which are applied to the dual-fuel engine, wherein the engine comprises a heater arranged on the outer surface of a methanol injector, an electromagnetic valve arranged at a water outlet of the engine, and the electromagnetic valve is connected with a cooling liquid inlet of the heater; the method comprises the following steps: detecting whether a control parameter of the engine meets a preset starting condition or not; the starting conditions comprise that the running mode is a dual-fuel mode, the ambient temperature is lower than a preset first temperature threshold value, and the temperature of the cooling liquid is higher than a preset second temperature threshold value; and if the control parameters meet the opening conditions, controlling the electromagnetic valve to open, so that the cooling liquid at the water outlet of the engine flows into the heater, and heating the methanol fuel in the methanol injector. This scheme can utilize the methanol fuel that the coolant liquid heating of the high temperature of engine delivery port will spray when methanol temperature is lower and coolant liquid temperature is higher to improve the atomization effect of the methanol fuel who sprays in the cylinder.
Description
Technical Field
The invention relates to the technical field of dual-fuel engines, in particular to a method and a device for heating fuel of a dual-fuel engine.
Background
The dual-fuel engine generally refers to a methanol-diesel engine, and when the engine works, methanol and diesel oil can be injected into a cylinder simultaneously, so that the two fuels are mixed and combusted in the cylinder, and the effects of improving the combustion efficiency of the engine and reducing the environmental pollution are achieved.
However, methanol has a high latent heat of vaporization, and therefore, poor atomization of methanol injected into a cylinder is likely to occur, which may cause engine misfire and insufficient combustion.
Disclosure of Invention
In view of the above disadvantages of the prior art, the present invention provides a method and apparatus for heating fuel for dual-fuel engine to improve the atomization effect of methanol in the dual-fuel engine.
The application provides a fuel heating method for a dual-fuel engine in a first aspect, which is applied to the dual-fuel engine, wherein the engine comprises a heater arranged on the outer surface of a methanol injector, and an electromagnetic valve arranged at a water outlet of the engine, and the electromagnetic valve is connected with a cooling liquid inlet of the heater;
the method comprises the following steps:
detecting whether control parameters of the engine meet preset starting conditions or not; the control parameters comprise an operation mode of the engine, an ambient temperature and a coolant temperature at a water outlet of the engine, and the starting conditions comprise that the operation mode is a dual-fuel mode, the ambient temperature is lower than a preset first temperature threshold value and the coolant temperature is higher than a preset second temperature threshold value;
and if the control parameter meets the opening condition, controlling the electromagnetic valve to open, so that the cooling liquid at the water outlet of the engine flows into the heater, and heating the methanol fuel in the methanol injector.
Optionally, the controlling the electromagnetic valve to open includes:
determining a target opening according to the environment temperature and the cooling liquid temperature;
and controlling the electromagnetic valve to be opened to the target opening.
Optionally, after detecting whether the control parameter of the engine meets the preset starting condition, the method further includes:
if the control parameter does not accord with the starting condition, detecting whether the control parameter accords with a preset heating condition;
if the control parameters accord with the heating condition, the electromagnetic valve is controlled to be opened, and a first resistance wire in the heater is controlled to be electrified so as to heat the cooling liquid flowing into the heater; wherein the heating condition includes the operating mode being a dual fuel mode, the ambient temperature being below the first temperature threshold and the coolant temperature not being above the second temperature threshold;
wherein when the control parameter does not comply with the heating condition, the electromagnetic valve is in a closed state.
Optionally, after detecting whether the control parameter of the engine meets the preset starting condition, the method further includes:
if the control parameter accords with the starting condition, outputting prompt information; wherein the prompt is for indicating that the temperature of the methanol fuel is too low.
Optionally, after detecting whether the control parameter of the engine meets the preset starting condition, the method further includes:
and if the control parameters meet the opening conditions, controlling a second resistance wire in the methanol injector to be electrified so as to heat the methanol fuel flowing into the methanol injector.
The second aspect of the application provides a fuel heating device for a dual-fuel engine, which is applied to the dual-fuel engine, wherein the engine comprises a heater arranged on the outer surface of a methanol injector, and an electromagnetic valve arranged at a water outlet of the engine, and the electromagnetic valve is connected with a cooling liquid inlet of the heater;
the device comprises:
the detection unit is used for detecting whether the control parameters of the engine meet preset starting conditions or not; the control parameters comprise an operation mode of the engine, an ambient temperature and a coolant temperature at a water outlet of the engine, and the starting conditions comprise that the operation mode is a dual-fuel mode, the ambient temperature is lower than a first temperature threshold value, and the coolant temperature is higher than a second temperature threshold value;
a control unit for:
and if the control parameter meets the opening condition, controlling the electromagnetic valve to open, so that the cooling liquid at the water outlet of the engine flows into the heater, and heating the methanol fuel in the methanol injector.
Optionally, when the control unit controls the electromagnetic valve to be opened, the control unit is specifically configured to:
determining a target opening according to the environment temperature and the cooling liquid temperature;
and controlling the electromagnetic valve to be opened to the target opening.
Optionally, the control unit is further configured to:
if the control parameters do not accord with the starting conditions, detecting whether the control parameters accord with preset heating conditions or not;
if the control parameters accord with the heating condition, the electromagnetic valve is controlled to be opened, and a first resistance wire in the heater is controlled to be electrified so as to heat the cooling liquid flowing into the heater; wherein the heating condition includes the operating mode being a dual fuel mode, the ambient temperature being below the first temperature threshold and the coolant temperature not being above the second temperature threshold;
wherein when the control parameter does not comply with the heating condition, the electromagnetic valve is in a closed state.
Optionally, the apparatus further comprises an output unit, configured to:
if the control parameter accords with the starting condition, outputting prompt information; wherein the prompt is for indicating that the temperature of the methanol fuel is too low.
Optionally, the control unit is further configured to:
and if the control parameters meet the opening conditions, controlling a second resistance wire in the methanol injector to be electrified so as to heat the methanol fuel flowing into the methanol injector.
The application provides a method and a device for heating fuel of a dual-fuel engine, which are applied to the dual-fuel engine, wherein the engine comprises a heater arranged on the outer surface of a methanol injector, an electromagnetic valve arranged at a water outlet of the engine, and a cooling liquid inlet of the electromagnetic valve and the heater are connected; the method comprises the following steps: detecting whether control parameters of the engine meet preset starting conditions or not; the control parameters comprise an operation mode of the engine, the ambient temperature and the coolant temperature at a water outlet of the engine, and the starting conditions comprise that the operation mode is a dual-fuel mode, the ambient temperature is lower than a preset first temperature threshold value and the coolant temperature is higher than a preset second temperature threshold value; and if the control parameters meet the opening conditions, controlling the electromagnetic valve to open, so that the cooling liquid at the water outlet of the engine flows into the heater, and heating the methanol fuel in the methanol injector. This scheme can utilize the methanol fuel that the high temperature coolant heating of engine delivery port will spray when the lower and coolant temperature of methanol temperature is higher to improve the atomization effect who sprays the methanol fuel in the cylinder.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of a conventional dual fuel engine;
FIG. 2 is a schematic structural diagram of a dual-fuel engine provided by an embodiment of the present application;
FIG. 3 is a flow chart of a method for fuel heating for a dual fuel engine provided by an embodiment of the present application;
FIG. 4 is a flow chart of another method of fuel heating for a dual fuel engine provided by an embodiment of the present application;
fig. 5 is a schematic diagram of an apparatus for heating fuel of a dual-fuel engine according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The methanol is liquid at normal temperature and normal pressure, has single chemical component, no sulfide, good anti-explosion performance, oxygen content up to 50 percent, only one C atom in a molecule and no C-C bond, and is ideal vehicle fuel. The cetane number of methanol is only 3, the autoignition temperature is as high as 500 ℃, the direct application of methanol fuel on a compression ignition engine requires a compression ratio as high as 25, and the direct compression ignition method is almost impossible. The most mature method for applying methanol to a compression ignition engine is a diesel/methanol binary fuel combustion method proposed by Tianjin university. The binary combustion adopts a fuel supply mode of injecting methanol fuel at low pressure in an air inlet channel and directly injecting diesel fuel in a cylinder, uniform methanol-air mixed gas is ignited and combusted by the directly injected diesel fuel in the cylinder, and the combustion efficiency of an engine is favorably improved by virtue of high latent heat of vaporization, low theoretical air-fuel ratio, high oxygen content and high H/C ratio of the methanol, and meanwhile, smoke intensity and NOx emission are reduced, and efficient clean combustion is realized.
In order to facilitate understanding of the technical solution of the present application, first, the operation principle of the dual-fuel engine is described with reference to the structural schematic diagram of the dual-fuel engine shown in fig. 1.
As shown in fig. 1, a methanol injector 101 is disposed at an intake pipe of the dual-fuel engine, and when the engine is in operation, the methanol injector can inject methanol fuel into air in the intake pipe 102, so as to form a methanol-air mixture in the intake pipe, and then the methanol-air mixture enters a cylinder, and a diesel injector 103 on one side of the cylinder injects diesel into the cylinder, so that methanol, diesel and air are finally mixed and combusted in the cylinder. The burned exhaust gas is discharged through an exhaust pipe 104.
Wherein both the diesel injector and the methanol injector are controlled by an Electronic Control Unit (ECU) 105 connected to the engine.
Although diesel/methanol dual-fuel engines have higher thermal efficiency and lower emission levels than diesel engines, due to the physicochemical properties of methanol fuel, the diesel/methanol dual-fuel engines have poor combustion performance at start-up and under small load, and have a fire risk in the cylinder. Therefore, the diesel/methanol dual-fuel engine uses a pure diesel working mode at the start and under the small load, and is switched into the diesel/methanol dual-fuel working mode after the engine is fully warmed up, and the injection proportion of the methanol is adjusted according to different working condition requirements.
The latent heat of vaporization of the methanol is 3-4 times that of the gasoline and diesel oil, the methanol fuel can absorb more heat in the evaporation process of the intake manifold due to high latent heat of vaporization, the average temperature in the intake manifold and a cylinder is reduced, the complete vaporization of the fuel can be prevented due to the generated cooling effect, the combustible mixed gas is difficult to form, the ignition time of the diesel oil can be delayed due to the addition of the methanol, the stagnation period is increased, the engine is not favorable for working at a low rotating speed and a low load, and the performance of the engine is deteriorated.
In order to solve the problem of poor atomization caused by large latent heat of vaporization of the methanol fuel, the invention provides a scheme for heating the methanol fuel in a dual-fuel engine.
In order to implement the solution of the present invention, it is first necessary to improve the structure of the existing dual fuel engine.
Fig. 2 is a schematic structural diagram of an improved dual-fuel engine provided in an embodiment of the present application.
As shown in fig. 2, a heater 202 is disposed on the outer surface of the methanol injector 201, the heater includes a coolant inlet 220 and a coolant outlet 221, the coolant inlet 220 is connected to the engine water outlet 203, and a solenoid valve 204 is disposed at the connection, and is connected to and controlled by an electronic control unit (i.e., ECU) 205.
The coolant outlet 221 is connected to the water pump inlet 206 of the engine.
When the engine works, the ECU can control the opening of the electromagnetic valve according to certain control logic, after the electromagnetic valve is opened, high-temperature cooling liquid which flows through the engine and absorbs heat generated during the working of the engine enters the heater through the cooling liquid inlet, so that the heat is transferred to methanol fuel in the methanol injector contacted with the heater, the methanol fuel 207 to be injected is heated, and the heated methanol fuel is sprayed out from the methanol nozzle 208. Then the cooling liquid flows out from the cooling liquid outlet and returns to the original cooling liquid circulating system through the water pump inlet.
Through the above improvement, the temperature of the methanol fuel to be injected in the methanol injector can be increased, and the problem of insufficient atomization of the methanol fuel is improved.
The coolant may be water or another liquid used to cool the engine.
According to the structure of the dual-fuel engine shown in fig. 2, the embodiment of the application provides a fuel heating method for the dual-fuel engine, which is applied to the dual-fuel engine, the engine comprises a heater arranged on the outer surface of a methanol injector, an electromagnetic valve arranged on a water outlet of the engine, and the electromagnetic valve is connected with a cooling liquid inlet of the heater.
Referring to fig. 3, which is a flow chart of the method, the method may include the following steps.
The method provided in any embodiment of the present application can be performed by the electronic control unit shown in fig. 2.
S301, detecting whether the control parameters of the engine meet preset starting conditions.
The control parameters comprise an operation mode of the engine, the ambient temperature and the coolant temperature at a water outlet of the engine, and the starting condition comprises that the operation mode is a dual-fuel mode, the ambient temperature is lower than a preset first temperature threshold value and the coolant temperature is higher than a preset second temperature threshold value.
The dual fuel mode refers to an operation mode in which the engine uses both methanol fuel and diesel fuel. Part of the dual fuel engine will use only diesel fuel for combustion during the start-up phase and the low speed phase, and the operating mode of the engine will be a single fuel mode, in which it is not necessary to open the solenoid valve to heat the methanol fuel in the methanol injector since no methanol is injected, as opposed to heating the methanol fuel in the methanol injector which may be required if in the dual fuel mode.
The operating mode may be determined based on whether the methanol injector is in operation, and if the methanol injector is not in operation, the operating mode may be determined to be the single fuel mode, and if the methanol injector is in operation, the operating mode may be determined to be the dual fuel mode.
The first temperature threshold and the second temperature threshold may be determined specifically according to an actual scene, and the embodiment does not limit specific numerical values thereof.
For example, the first temperature threshold may be set to 10 ℃ assuming that the methanol fuel is less effective in evaporation and atomization when the ambient temperature is less than 10 ℃ and is more effective in evaporation and atomization when the ambient temperature is greater than 10 ℃. That is, the electromagnetic valve needs to be opened only when the evaporation atomization effect of the methanol fuel is poor.
The second temperature threshold is set to avoid that the coolant with too low temperature enters the heater and adversely affects the atomization of the methanol fuel. For example, the second temperature threshold may be set at 25 ℃, and if the temperature of the coolant at the engine outlet is not higher than 25 ℃, the solenoid valve does not need to be opened.
The ambient temperature may be detected by a temperature sensor provided on the fuel tank, and the coolant temperature may be detected by a temperature sensor provided at the engine water outlet.
If the control parameter does not meet the opening condition, step S303 is executed.
That is, in the present embodiment, the solenoid valve is opened only when the dual-fuel mode is selected, the ambient temperature is lower than the preset first temperature threshold, and the coolant temperature is higher than the preset second temperature threshold.
And S302, controlling the electromagnetic valve to open, enabling the cooling liquid at the water outlet of the engine to flow into the heater, and heating the methanol fuel in the methanol injector.
In some alternative embodiments, the ECU may directly open the solenoid to the maximum opening degree, or may also open the solenoid to a preset fixed opening degree, for example, may open the solenoid to 70% of the maximum opening degree.
In other alternative embodiments, step S302, controlling the solenoid to open, may also include:
determining a target opening according to the ambient temperature and the cooling liquid temperature;
and controlling the electromagnetic valve to be opened to the target opening degree.
Specifically, the temperature difference between the ambient temperature and the coolant temperature may be calculated, and the target opening degree may be determined according to the temperature difference, where the larger the temperature difference is, the better the heating effect of the coolant is, and the coolant required for heating may be correspondingly reduced, so that a smaller target opening degree may be set, and conversely, the smaller the temperature difference is, a larger target opening degree may be set.
The beneficial effect of determining the target opening according to the ambient temperature and the cooling liquid temperature is as follows:
on one hand, the flow of the cooling liquid entering the heater can be controlled by controlling the opening of the electromagnetic valve, so that the temperature range of the heated methanol fuel is controlled, and the temperature of the methanol fuel to be injected in the methanol injector is not too high or too low. On the other hand, it is possible to avoid that too much coolant enters the heater and thus not enough coolant is used to cool the engine.
Optionally, after detecting whether the control parameter of the engine meets the preset starting condition, the method further includes:
if the control parameters accord with the starting conditions, outputting prompt information; wherein the prompt is for indicating that the temperature of the methanol fuel is too low.
The output mode of the prompt message can be that voice broadcasting is carried out in the vehicle cab, and text messages are displayed on a control panel in the vehicle cab.
The content of the output prompt message may include a prompt that the temperature of the methanol fuel is too low to be used in the dual fuel mode.
Optionally, the prompt may be output when the ambient temperature is lower than the first temperature threshold and the operating mode of the engine is the dual-fuel mode, regardless of whether the coolant temperature is higher than the second temperature threshold.
The beneficial effect of outputting the prompt message is that the driver is prompted to control the engine to switch to the single fuel mode, and the engine is prevented from working in the dual fuel mode under the condition that the temperature of the methanol fuel is too low.
Optionally, after detecting whether the control parameter of the engine meets the preset starting condition, the method further includes:
and if the control parameters meet the opening conditions, controlling a second resistance wire in the methanol injector to be electrified so as to heat the methanol fuel flowing into the methanol injector.
The second resistance wire may be disposed in a conduit of the methanol injector through which methanol fuel flows.
By controlling the second resistance wire to be electrified, the methanol fuel can be heated by the second resistance wire and the cooling liquid with higher temperature in the heater at the same time, and a better heating effect is obtained.
And S303, not controlling the electromagnetic valve to be opened.
In step S303, if the electromagnetic valve is in an open state before S303 is executed, the ECU sends a close command to the electromagnetic valve, thereby controlling the electromagnetic valve to close. If the electromagnetic valve is already in the closed state before execution of S303, the ECU does not send a command to the electromagnetic valve, and the electromagnetic valve maintains the original closed state. Therefore, the solenoid valve is not controlled to be opened, which corresponds to that the solenoid valve is in a closed state when the corresponding condition is not met.
The application provides a method and a device for heating fuel of a dual-fuel engine, which are applied to the dual-fuel engine, wherein the engine comprises a heater arranged on the outer surface of a methanol injector, an electromagnetic valve arranged at a water outlet of the engine, and the electromagnetic valve is connected with a cooling liquid inlet of the heater; the method comprises the following steps: detecting whether control parameters of the engine meet preset starting conditions or not; the control parameters comprise an operation mode of the engine, the ambient temperature and the coolant temperature at a water outlet of the engine, and the starting conditions comprise that the operation mode is a dual-fuel mode, the ambient temperature is lower than a preset first temperature threshold value and the coolant temperature is higher than a preset second temperature threshold value; and if the control parameters meet the opening conditions, controlling the electromagnetic valve to open, so that the cooling liquid at the water outlet of the engine flows into the heater, and heating the methanol fuel in the methanol injector. This scheme can utilize the methanol fuel that the high temperature coolant heating of engine delivery port will spray when the lower and coolant temperature of methanol temperature is higher to improve the atomization effect who sprays the methanol fuel in the cylinder.
Referring to fig. 4, a flow chart of another method for heating fuel for a dual fuel engine according to an embodiment of the present application may include the following steps.
S301, detecting whether the control parameters of the engine meet preset starting conditions.
The control parameters comprise an operation mode of the engine, the ambient temperature and the coolant temperature at a water outlet of the engine, and the starting condition comprises that the operation mode is a dual-fuel mode, the ambient temperature is lower than a preset first temperature threshold value and the coolant temperature is higher than a preset second temperature threshold value.
If the control parameter does not meet the opening condition, step S302 is executed, and if the control parameter does not meet the opening condition, step S403 is executed.
And S302, controlling the electromagnetic valve to open, enabling the cooling liquid at the water outlet of the engine to flow into the heater, and heating the methanol fuel in the methanol injector.
S403, detecting whether the control parameters accord with preset heating conditions.
If the control parameter is not in accordance with the heating condition, step S404 is executed, and if the control parameter is not in accordance with the heating condition, step S303 is executed.
The heating condition comprises that the operation mode is a dual-fuel mode, the ambient temperature is lower than a first temperature threshold value, and the temperature of the cooling liquid is not higher than a second temperature threshold value.
If the operating mode is a dual fuel mode and the ambient temperature is lower than the first temperature threshold, it indicates that the methanol fuel in the methanol injector needs to be heated at this time, but the coolant temperature is not higher than the second temperature threshold, i.e. the coolant temperature is too low to be used for heating, at this time, the coolant may be heated in other manners, so that the coolant temperature at the engine water outlet is increased to be higher than the second temperature threshold.
And S404, controlling the electromagnetic valve to be opened, and controlling the first resistance wire in the heater to be electrified so as to heat the cooling liquid flowing into the heater.
The first resistance wire can be arranged in a pipeline at a water outlet of the engine, and the surface of the first resistance wire is covered with an insulating coating.
And S303, not controlling the electromagnetic valve to be opened.
The beneficial effect of this embodiment lies in:
when the methanol fuel needs to be heated but the temperature of the cooling liquid is too low to be heated, the first resistance wire is utilized to heat the cooling liquid, so that the temperature of the cooling liquid is increased to be enough for heating the methanol fuel, and the methanol fuel can be heated when the temperature of the cooling liquid at the water outlet of the engine is lower.
According to the fuel heating method of the dual-fuel engine provided by the embodiment of the application, the embodiment of the application also provides a fuel heating device of the dual-fuel engine, which is applied to the dual-fuel engine.
Referring to fig. 5, which is a schematic structural diagram of the apparatus, the apparatus may include the following units.
The apparatus provided in the present embodiment may be regarded as an Electronic Control Unit (ECU) shown in fig. 2.
The detecting unit 501 is configured to detect whether a control parameter of the engine meets a preset starting condition.
The control parameters comprise an operation mode of the engine, the ambient temperature and the coolant temperature at a water outlet of the engine, and the starting conditions comprise that the operation mode is a dual-fuel mode, the ambient temperature is lower than a first temperature threshold value and the coolant temperature is higher than a second temperature threshold value;
a control unit 502 for:
and if the control parameters meet the opening conditions, controlling the electromagnetic valve to open, so that the cooling liquid at the water outlet of the engine flows into the heater, and heating the methanol fuel in the methanol injector.
Optionally, when the control unit 502 controls the solenoid to be turned on, the control unit is specifically configured to:
determining a target opening according to the ambient temperature and the cooling liquid temperature;
and controlling the electromagnetic valve to be opened to the target opening degree.
Optionally, the control unit 502 is further configured to:
if the control parameters do not accord with the starting conditions, detecting whether the control parameters accord with preset heating conditions or not;
if the control parameters meet the heating conditions, the electromagnetic valve is controlled to be opened, and a first resistance wire in the heater is controlled to be electrified so as to heat the cooling liquid flowing into the heater; the heating condition comprises that the operation mode is a dual-fuel mode, the ambient temperature is lower than a first temperature threshold value, and the temperature of the cooling liquid is not higher than a second temperature threshold value;
and if the control parameters do not accord with the heating condition, controlling the electromagnetic valve to be closed.
Optionally, the apparatus further comprises an output unit 503, configured to:
if the control parameters accord with the starting conditions, outputting prompt information; wherein the prompt is for indicating that the temperature of the methanol fuel is too low.
Optionally, the control unit 502 is further configured to:
and if the control parameters meet the opening conditions, controlling a second resistance wire in the methanol injector to be electrified so as to heat the methanol fuel flowing into the methanol injector.
The working principle of the device for heating fuel of a dual-fuel engine provided in this embodiment may refer to relevant steps in the method for heating fuel of a dual-fuel engine provided in any embodiment of this application, and details are not repeated here.
The application provides a fuel heating device of a dual-fuel engine, which is applied to the dual-fuel engine, wherein the engine comprises a heater arranged on the outer surface of a methanol injector, and an electromagnetic valve arranged at a water outlet of the engine, and the electromagnetic valve is connected with a cooling liquid inlet of the heater; the device comprises: the detection unit 501 detects whether the control parameter of the engine meets a preset starting condition; the control parameters comprise an operation mode of the engine, the ambient temperature and the coolant temperature at a water outlet of the engine, and the starting conditions comprise that the operation mode is a dual-fuel mode, the ambient temperature is lower than a preset first temperature threshold value and the coolant temperature is higher than a preset second temperature threshold value; if the control parameters meet the opening conditions, the control unit 502 controls the electromagnetic valve to open, so that the cooling liquid at the water outlet of the engine flows into the heater to heat the methanol fuel in the methanol injector. This scheme can utilize the methanol fuel that the coolant liquid heating of the high temperature of engine delivery port will spray when methanol temperature is lower and coolant liquid temperature is higher to improve the atomization effect of the methanol fuel who sprays in the cylinder.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
It should be noted that the terms "first", "second", and the like in the present invention are only used for distinguishing different devices, modules or units, and are not used for limiting the order or interdependence relationship of the functions performed by the devices, modules or units.
Those skilled in the art can make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The fuel heating method of the dual-fuel engine is characterized by being applied to the dual-fuel engine, wherein the engine comprises a heater arranged on the outer surface of a methanol injector, and an electromagnetic valve arranged at a water outlet of the engine, and the electromagnetic valve is connected with a cooling liquid inlet of the heater;
the method comprises the following steps:
detecting whether control parameters of the engine meet preset starting conditions or not; the control parameters comprise an operation mode of the engine, an ambient temperature and a coolant temperature at a water outlet of the engine, and the starting conditions comprise that the operation mode is a dual-fuel mode, the ambient temperature is lower than a preset first temperature threshold value and the coolant temperature is higher than a preset second temperature threshold value;
and if the control parameter accords with the opening condition, controlling the electromagnetic valve to open, so that the cooling liquid at the water outlet of the engine flows into the heater, and heating the methanol fuel in the methanol injector.
2. The method of claim 1, wherein said controlling said solenoid valve to open comprises:
determining a target opening according to the environment temperature and the cooling liquid temperature;
and controlling the electromagnetic valve to be opened to the target opening.
3. The method of claim 1, wherein after detecting whether the control parameter of the engine meets a preset starting condition, the method further comprises:
if the control parameters do not accord with the starting conditions, detecting whether the control parameters accord with preset heating conditions or not;
if the control parameters accord with the heating condition, the electromagnetic valve is controlled to be opened, and a first resistance wire in the heater is controlled to be electrified so as to heat the cooling liquid flowing into the heater; wherein the heating condition includes the operating mode being a dual fuel mode, the ambient temperature being below the first temperature threshold and the coolant temperature not being above the second temperature threshold;
wherein when the control parameter does not comply with the heating condition, the electromagnetic valve is in a closed state.
4. The method of claim 1, wherein after detecting whether the control parameter of the engine meets a preset starting condition, the method further comprises:
if the control parameter accords with the starting condition, outputting prompt information; wherein the prompt is for indicating that the temperature of the methanol fuel is too low.
5. The method of claim 1, wherein after detecting whether the control parameter of the engine meets a preset starting condition, the method further comprises:
and if the control parameters meet the opening conditions, controlling a second resistance wire in the methanol injector to be electrified so as to heat the methanol fuel flowing into the methanol injector.
6. A fuel heating device of a dual-fuel engine is characterized in that the fuel heating device is applied to the dual-fuel engine, the engine comprises a heater arranged on the outer surface of a methanol injector, and an electromagnetic valve arranged at a water outlet of the engine, and the electromagnetic valve is connected with a cooling liquid inlet of the heater;
the device comprises:
the detection unit is used for detecting whether the control parameters of the engine meet preset starting conditions or not; the control parameters comprise an operation mode of the engine, an ambient temperature and a coolant temperature at a water outlet of the engine, and the starting conditions comprise that the operation mode is a dual-fuel mode, the ambient temperature is lower than a first temperature threshold value and the coolant temperature is higher than a second temperature threshold value;
a control unit for:
and if the control parameter meets the opening condition, controlling the electromagnetic valve to open, so that the cooling liquid at the water outlet of the engine flows into the heater, and heating the methanol fuel in the methanol injector.
7. The device according to claim 6, wherein the control unit controls the solenoid valve to be opened, in particular to:
determining a target opening according to the environment temperature and the cooling liquid temperature;
and controlling the electromagnetic valve to be opened to the target opening.
8. The apparatus of claim 6, wherein the control unit is further configured to:
if the control parameter does not accord with the starting condition, detecting whether the control parameter accords with a preset heating condition;
if the control parameters accord with the heating condition, the electromagnetic valve is controlled to be opened, and a first resistance wire in the heater is controlled to be electrified so as to heat the cooling liquid flowing into the heater; wherein the heating condition includes the operating mode being a dual fuel mode, the ambient temperature being below the first temperature threshold and the coolant temperature not being above the second temperature threshold;
wherein when the control parameter does not comply with the heating condition, the electromagnetic valve is in a closed state.
9. The apparatus of claim 6, further comprising an output unit to:
if the control parameter accords with the starting condition, outputting prompt information; wherein the prompt is for indicating that the temperature of the methanol fuel is too low.
10. The apparatus of claim 6, wherein the control unit is further configured to:
and if the control parameters meet the opening conditions, controlling a second resistance wire in the methanol injector to be electrified so as to heat the methanol fuel flowing into the methanol injector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310006444.5A CN115898720A (en) | 2023-01-04 | 2023-01-04 | Method and apparatus for fuel heating for dual fuel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310006444.5A CN115898720A (en) | 2023-01-04 | 2023-01-04 | Method and apparatus for fuel heating for dual fuel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115898720A true CN115898720A (en) | 2023-04-04 |
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ID=86484764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310006444.5A Pending CN115898720A (en) | 2023-01-04 | 2023-01-04 | Method and apparatus for fuel heating for dual fuel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115898720A (en) |
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2023
- 2023-01-04 CN CN202310006444.5A patent/CN115898720A/en active Pending
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