CN114233505B - Method for injecting fuel into a swirl combustion chamber, vehicle and storage medium - Google Patents
Method for injecting fuel into a swirl combustion chamber, vehicle and storage medium Download PDFInfo
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- CN114233505B CN114233505B CN202210174142.4A CN202210174142A CN114233505B CN 114233505 B CN114233505 B CN 114233505B CN 202210174142 A CN202210174142 A CN 202210174142A CN 114233505 B CN114233505 B CN 114233505B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
- F02B23/10—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
- F02D41/402—Multiple injections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F3/26—Pistons having combustion chamber in piston head
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D2041/389—Controlling fuel injection of the high pressure type for injecting directly into the cylinder
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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
- 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
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses an oil injection method for a swirl combustion chamber, the swirl combustion chamber, a vehicle and a storage medium. The method comprises the steps of obtaining a target oil injection duration of a swirl combustion chamber, a first oil injection starting point, a first oil injection end point, a current oil injection starting point and a current oil injection end point of a first oil injection port; determining a first oil injection duration of the first oil injection port, and determining a current oil injection duration of the first oil injection port; and respectively determining a first target oil injection duration of the first oil injection port and a second target oil injection duration of the second oil injection port according to the target oil injection duration, the first oil injection duration and the current oil injection duration. The problem that the existing combustion chamber is designed only for one main spray and cannot meet the requirements of two main sprays is solved, the existing combustion system does not have a scheme of promoting atomized combustion of fuel oil by utilizing the impact of two oil bundles, and the switching of the single main spray and the double main spray is judged according to the fuel injection duration, so that the combustion speed in a cylinder is accelerated, and the fuel consumption of a diesel engine is improved.
Description
Technical Field
The invention relates to the technical field of combustion systems of diesel engines, in particular to an oil injection method of a swirl combustion chamber, the swirl combustion chamber, a vehicle and a storage medium.
Background
With the rising of fuel price, people begin to pay more attention to the energy conservation and consumption reduction of engines in the competition of vehicle power systems. Currently, diesel engines are widely used in automotive and non-road products and will continue to function for a considerable period of time.
The existing diesel engine electric control system is more and more adopted, the atomization quality of the oil sprayer is obviously improved, but the existing diesel engine combustion chamber cannot be matched with the injection pressure, researches find that the reasonable spray impact can improve the spatial distribution and the atomization effect of the spray, and the air utilization rate and the uniformity of mixed gas are improved. Therefore, how to actually reduce the oil consumption of the oil engine by using the enhanced atomization is a problem which needs to be continuously solved at present.
Disclosure of Invention
The invention provides an oil injection method of a swirl combustion chamber, the swirl combustion chamber, a vehicle and a storage medium, which aim to solve the problem of insufficient combustion of fuel in the combustion chamber.
According to an aspect of the present invention, there is provided a method of injecting fuel into a swirl chamber having an axial cross-sectional profile
The fuel injection method of the swirl combustion chamber comprises the following steps:
acquiring a target oil injection duration of the swirl combustion chamber, a first oil injection starting point, a first oil injection end point, a current oil injection starting point and a current oil injection end point of a first oil injection port;
determining a first oil injection duration of the first oil injection port according to the first oil injection starting point and the first oil injection end point, and determining a current oil injection duration of the first oil injection port according to the current oil injection starting point and the current oil injection end point;
and respectively determining a first target oil injection duration of the first oil injection port and a second target oil injection duration of the second oil injection port according to the target oil injection duration, the first oil injection duration and the current oil injection duration.
Optionally, obtaining the target fuel injection duration of the swirl combustor includes:
the method comprises the steps of obtaining rail pressure, circulating fuel injection quantity and fuel injector flow of an engine when the engine is in a current working condition point, and determining a target fuel injection duration of a swirl combustion chamber according to the rail pressure, the circulating fuel injection quantity and the fuel injector flow based on a Bernoulli equation.
Optionally, the current injection starting point is not earlier than the first injection starting point, and the current injection ending point is not later than the first injection ending point.
Optionally, determining a first target fuel injection duration of the first fuel injection port and a second target fuel injection duration of the second fuel injection port according to the target fuel injection duration, the first fuel injection duration, and the current fuel injection duration, respectively, includes:
if the target oil injection duration is greater than the first oil injection duration, determining that the first target oil injection duration of the first oil injection port is the first oil injection duration, and the second target oil injection duration of the second oil injection port is the difference value between the target oil injection duration and the first oil injection duration;
and if the target oil injection duration is less than or equal to the first oil injection duration, determining the first target oil injection duration of the first oil injection port as the current oil injection duration.
Optionally, the fuel injection method for the swirl combustion chamber further comprises:
the first oil injection port executes oil injection operation according to the first target oil injection duration, and the second oil injection port executes oil injection operation according to the second target oil injection duration.
According to another aspect of the present invention, there is provided a swirl combustor for performing the method of fuel injection of the swirl combustor of any of the embodiments of the present invention;
the inner wall of the swirl combustion chamber comprises a central boss table surface positioned in the center and an arc surface connected to the periphery of the central boss table surface; and a first oil beam sprayed by a first oil spray opening of the oil sprayer reaches the throat position of the swirl combustion chamber along the inner wall of the swirl combustion chamber, a second oil beam sprayed by a second oil spray opening of the oil sprayer faces the throat position, and the first oil beam and the second oil beam collide at the throat position.
Optionally, the first oil injection port includes a plurality of first oil injection holes, the second oil injection port includes a plurality of second oil injection holes, and the first oil injection holes are the same as the second oil injection holes.
Optionally, a bus included angle of the central boss mesa is α;
two symmetrical first oil spray holes of the first oil spray opening form an oil sprayer spray cone angle of the first oil spray opening, and the oil sprayer spray cone angle is larger than the included angle alpha of the bus.
According to another aspect of the present invention, there is provided a vehicle comprising a swirl combustion chamber according to any of the embodiments of the present invention.
According to another aspect of the present invention, a computer-readable storage medium is provided, which stores computer instructions for causing a processor to implement a method for fuel injection in a plume combustion chamber according to any one of the embodiments of the present invention when the computer instructions are executed.
According to the technical scheme of the embodiment of the invention, the target oil injection duration of the swirl combustion chamber, the first oil injection starting point, the first oil injection end point, the current oil injection starting point and the current oil injection end point of the first oil injection port are obtained; determining a first oil injection duration of the first oil injection port according to the first oil injection starting point and the first oil injection end point, and determining a current oil injection duration of the first oil injection port according to the current oil injection starting point and the current oil injection end point; and respectively determining a first target oil injection duration of the first oil injection port and a second target oil injection duration of the second oil injection port according to the target oil injection duration, the first oil injection duration and the current oil injection duration. The problem that the existing combustion chamber is designed only for one main spray and cannot meet the requirements of two main sprays is solved, the existing combustion system does not have a scheme of promoting atomized combustion of fuel oil by utilizing the impact of two oil bundles, and the switching of the single main spray and the double main sprays is judged according to the fuel injection duration, so that the beneficial effects of accelerating the combustion speed in a cylinder and improving the fuel consumption of a diesel engine are achieved.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1A is a flow chart illustrating a method for injecting fuel into a plume combustor, according to an embodiment of the present invention;
FIG. 1B is a schematic diagram illustrating a dual main injection strategy according to an embodiment of the present invention;
FIG. 1C is a schematic diagram of another dual main injection strategy according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating a method for injecting fuel into a swirl chamber according to a second embodiment of the present invention;
FIG. 3 is an axial cross-sectional schematic view of a swirl chamber provided in accordance with a third embodiment of the present invention;
fig. 4 is a schematic diagram of the fuel injection direction of a swirl combustion chamber according to the third embodiment of the invention.
Detailed Description
In order to make those skilled in the art better understand the technical solutions of the present invention, 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.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example one
FIG. 1A is a flow chart of a fuel injection method for a swirl combustor according to an embodiment of the present invention, which is applicable to a case where fuel injection is switched between single main injection and dual main injection according to a determination result of a fuel injection duration to ensure sufficient fuel atomization, and the fuel injection method for the swirl combustor is applied to the swirl combustor according to any embodiment of the present invention, and an axial cross-sectional profile of the swirl combustor is in a shape of a profile of
The swirl combustion chamber is matched with an oil injector with a double-layer spray hole for use, the oil injector is provided with a first oil injection port and a second oil injection port, and the swirl combustion chamber can be arranged in a diesel vehicle. As shown in fig. 1A, the fuel injection method of the swirl combustor includes:
and S110, acquiring a target oil injection duration of the swirl combustion chamber, a first oil injection starting point, a first oil injection ending point, a current oil injection starting point and a current oil injection ending point of a first oil injection port.
The target fuel injection duration is the sum of fuel injection durations corresponding to the first fuel injection port and the second fuel injection port which guarantee sufficient fuel atomization, namely the target fuel injection duration is the sum of the fuel injection duration of the first fuel injection port and the fuel injection duration of the second fuel injection port.
For example, the fuel injection duration is a rotation angle interval of the crankshaft of the fuel injector during fuel injection, for example, the fuel injection duration of the fuel injector is 25 ° ca, which means that the crankshaft of the fuel injector rotates 25 ° ca during fuel injection, if the first injection of the fuel injector is-5 ° ca before the top dead center and ends 5 ° ca after the top dead center, the second injection of the fuel injector starts to inject fuel at 8 ° ca after the top dead center, and ends at 23 ° ca after the top dead center, the fuel injection duration of the fuel injector is the sum of two fuel injection durations, which is 25 ° ca.
In one embodiment provided by the invention, under the condition that an engine is in a current working condition point, the rail pressure, the circulating fuel injection quantity and the fuel injector flow of the engine are obtained, and the target fuel injection duration of the swirl combustion chamber is determined according to the rail pressure, the circulating fuel injection quantity and the fuel injector flow based on a Bernoulli equation.
It is understood that the calculation method of the fuel injection duration through the bernoulli equation can adopt the existing calculation method, and the embodiment does not limit the method.
In this embodiment, the current oil injection starting point is that the first oil injection port injects near the top dead center, and the oil injection starting point of the second oil injection port injects after the top dead center.
The piston moves in the cylinder with the top of the piston reaching a position at the highest point, referred to as top dead center. Because the piston reciprocates up and down, the crankshaft rotates (360 degrees in one circle, generally, the degree of front/back of the top dead center starts to spray oil, namely the angle of the crankshaft rotating during oil spraying), the rotating motion of the crankshaft is converted into the reciprocating motion of the piston through the connecting rod, and the oil sprayer is fixed on a cylinder cover.
Fig. 1B is a schematic diagram of a dual main injection rule according to an embodiment of the present invention, as shown in fig. 1B, a first injection port injects near a top dead center, i.e., a current injection starting point inj1, and a second injection port injects after the top dead center, i.e., an injection starting point inj2 of the second injection port, and accordingly, an injection duration corresponding to the first injection port and an injection duration corresponding to the second injection port are MI1 and MI2, respectively.
Further, it can be known that the injection duration of the swirl combustion chamber is the sum of the injection duration MI1 corresponding to the first injection port and the injection duration MI2 corresponding to the second injection port.
And considering influence factors on the injection process, including the shape and the size of the combustion chamber, the position of the spray hole of the oil injector and the angle of the spray cone angle, and performing three-dimensional in-cylinder simulation calculation on the shape and the size of the combustion chamber, the position of the spray hole of the oil injector and the angle of the spray cone angle to obtain a first oil injection starting point and a first oil injection ending point of the first oil injection port.
S120, determining a first oil injection duration of the first oil injection port according to the first oil injection starting point and the first oil injection ending point, and determining a current oil injection duration of the first oil injection port according to the current oil injection starting point and the current oil injection ending point.
On the basis of the above, fig. 1C is a schematic diagram of another dual main injection law provided by the embodiment of the present invention, as shown in fig. 1C, a first injection start point of the first injection port is determined
And a first injection end point
The first oil injection starting point is the earliest oil injection starting point at which a first oil beam sprayed by the first oil injection port can collide with a second oil beam sprayed by the second oil injection port, and the first oil injection ending point is the latest oil injection ending point at which the first oil beam sprayed by the first oil injection port can collide with the second oil beam sprayed by the second oil injection port.
It is understood that if the present embodiment adopts two main injections, and the embodiment is continued with reference to fig. 1C, the injection start point inj2 of the second injection port is the injection advance angle of the second injection port
。
Specifically, the current injection start point inj1 is not earlier than the first injection start point
The current oil injection end point is not later than the first oil injection end point
The corresponding second oil injection port is at the oil injection starting point inj2 =of the second oil injection port
When the injection is started, the first oil beam and the second oil beam can be impacted, the oil beams are sufficiently mixed and atomized, the combustion speed in the cylinder is accelerated, and the oil consumption is reduced.
Further, on the basis, the first oil injection duration of the first oil injection port is
Duration of first injection
Equal to the first end of injection
With the first injection start
The interval of the angle of rotation of the crankshaft in between, i.e. the first duration of injection
From the start of the first injection
Start of injection, at the end of the first injection
The injection is ended.
In summary, a current fuel injection duration of the first fuel injection port is determined according to the current fuel injection starting point and the current fuel injection ending point, where the current fuel injection duration is an angle interval that the crankshaft of the actual first fuel injection port rotates during fuel injection, and it should be noted that the current fuel injection duration is a situation that only the first fuel injection port is opened for use when the swirl combustion chamber only adopts single main injection.
S130, respectively determining a first target oil injection duration of the first oil injection port and a second target oil injection duration of the second oil injection port according to the target oil injection duration, the first oil injection duration and the current oil injection duration.
Specifically, if the target oil injection duration is greater than the first oil injection duration, a first oil injection port and a second oil injection port are opened simultaneously, the first target oil injection duration of the first oil injection port is determined as the first oil injection duration, and the second target oil injection duration of the second oil injection port is determined as a difference value between the target oil injection duration and the first oil injection duration;
and if the target oil injection duration is less than or equal to the first oil injection duration, opening the first oil injection port, closing the second oil injection port, and determining that the first target oil injection duration of the first oil injection port is the current oil injection duration.
On the basis of the above-described embodiment, when the first injection port and the second injection port are simultaneously opened, the first injection port performs the injection operation according to the first target injection duration, which is the first injection duration
The second oil injection port executes oil injection operation according to the second target oil injection duration, and the second target oil injection duration is the target oil injection duration MI-the first oil injection duration
。
And when the first oil injection port is opened and the second oil injection port is closed, only the first oil injection port is adopted for injection, the first oil injection port executes oil injection operation according to the first target oil injection duration, and the first target oil injection duration is the current oil injection duration MI 1.
According to the technical scheme of the embodiment of the invention, the target oil injection duration of the swirl combustion chamber, the first oil injection starting point, the first oil injection end point, the current oil injection starting point and the current oil injection end point of the first oil injection port are obtained; determining a first oil injection duration of the first oil injection port according to the first oil injection starting point and the first oil injection end point, and determining a current oil injection duration of the first oil injection port according to the current oil injection starting point and the current oil injection end point; and respectively determining a first target oil injection duration of the first oil injection port and a second target oil injection duration of the second oil injection port according to the target oil injection duration, the first oil injection duration and the current oil injection duration. The problem that the existing combustion chamber is designed only for one main spray and cannot meet the requirements of two main sprays is solved, the existing combustion system does not have a scheme of promoting atomized combustion of fuel oil by utilizing the impact of two oil bundles, and the switching of the single main spray and the double main spray is judged according to the fuel injection duration, so that the combustion speed in a cylinder is accelerated, and the fuel consumption of a diesel engine is improved.
Example two
Fig. 2 is a flowchart of a fuel injection method for a swirl combustor according to a second embodiment of the present invention. As shown in fig. 2, the fuel injection method of the swirl combustor comprises the following steps:
and S210, starting.
In this step, the engine is ignited to start the engine.
And S220, acquiring a target oil injection duration of the swirl combustor, a first oil injection starting point, a first oil injection ending point, a current oil injection starting point and a current oil injection ending point of a first oil injection port.
In one embodiment provided by the invention, under the condition that an engine is in a current working condition point, the rail pressure, the circulating fuel injection quantity and the fuel injector flow of the engine are obtained, and the target fuel injection duration of the swirl combustion chamber is determined according to the rail pressure, the circulating fuel injection quantity and the fuel injector flow based on a Bernoulli equation.
The current oil injection starting point is not earlier than the first oil injection starting point, and the current oil injection end point is not later than the first oil injection end point.
S230, determining a first oil injection duration of the first oil injection port according to the first oil injection starting point and the first oil injection end point, and determining a current oil injection duration of the first oil injection port according to the current oil injection starting point and the current oil injection end point.
S240, judging whether the target oil injection duration is less than or equal to the first oil injection duration, if so, executing a step S250, and if not, executing a step S270.
And S250, opening the first oil injection port, closing the second oil injection port and executing the step S260.
Specifically, under the working condition that the target oil injection duration is less than or equal to the first oil injection duration, the swirl combustion chamber is enough to ensure the atomization and mixing of the oil bundles, so that single oil injection is adopted, namely only the first oil injection port is opened.
And S260, determining that the first target oil injection duration of the first oil injection port is the current oil injection duration, and executing the step S290.
S270, simultaneously opening the first oil injection port and the second oil injection port, and executing the step S280.
Specifically, under the working condition that the fuel injection duration of the fuel injector is long, namely under the working condition that the target fuel injection duration is larger than the first fuel injection duration, the swirl combustion chamber cannot ensure the atomized mixing of the fuel bundles, and the first fuel injection port and the second fuel injection port are opened simultaneously.
S280, determining a first target oil injection duration of the first oil injection port as the first oil injection duration, and determining a second target oil injection duration of the second oil injection port as a difference value of the target oil injection duration and the first oil injection duration, and executing a step S290.
And S290, executing the oil injection operation.
Specifically, when a first oil injection port and a second oil injection port are simultaneously opened, the first oil injection port executes oil injection operation according to the first target oil injection duration, and the first target oil injection duration is the first oil injection duration
The second oil injection port executes oil injection operation according to the second target oil injection duration, and the second target oil injection duration is the target oil injection duration MI-the first oil injection duration
。
And when the first oil injection port is opened and the second oil injection port is closed, only the first oil injection port is adopted for injection, the first oil injection port executes oil injection operation according to the current target oil injection duration, and the first target oil injection duration is the current oil injection duration MI 1.
EXAMPLE III
Fig. 3 is a schematic axial cross-sectional view of a swirl combustion chamber 100 according to a third embodiment of the present invention, fig. 4 is a schematic fuel injection direction of the swirl combustion chamber 100 according to the third embodiment of the present invention, and this embodiment is applicable to a case where atomized combustion of fuel is promoted by changing the propagation direction of the fuel bundle, and as shown in fig. 3 and 4, the axial cross-sectional profile of the swirl combustion chamber 100 is in the form of
The swirl combustion chamber 100 is matched with an oil injector for use, the oil injector is provided with a first oil injection port and a second oil injection port, and the inner wall of the swirl combustion chamber 100 comprises a central boss table surface 300 positioned in the center and an arc-shaped surface connected to the periphery of the central boss table surface 300; the first oil jet ejected from the first oil jet flows to the throat position of the swirl combustion chamber 100 along the inner wall of the swirl combustion chamber 100, the second oil jet ejected from the second oil jet flows towards the throat position, and the first oil jet and the second oil jet collide at the throat position.
Optionally, the central boss 300 includes a circular surface 310 at the center and a conical surface 320 connected to the periphery of the circular surface 310, the arc surface being connected to the conical surface 320. It will be appreciated that in other embodiments, the circular face 310 may be eliminated, and the central region of the plume combustion chamber 100 may be in the shape of a pointed cone, and the pointed tip may be replaced by a rounded tip, without limitation.
With continued reference to fig. 4, the first oil jet from the first oil jet is spread in a fan shape along the conical surface 320, atomized into oil mist, and collided with the arc surface to form upward plume telemotion for combustion with air outside the plume combustor 100. The second oil beam sprayed out of the second oil injection port faces the throat position and collides with the first oil beam at the throat position, so that atomization and mixing of the oil beam are effectively guaranteed, the combustion speed in the cylinder is accelerated, and the oil consumption is reduced.
On the basis of the above embodiment, the oil injector is a multi-hole oil injector, and the first oil injection port includes a plurality of first oil injection holes, and the second oil injection port includes a plurality of second oil injection holes, and the first oil injection holes are the same as the second oil injection holes.
It can be known that, from top to bottom, the oil spray holes of the oil injector are circumferentially distributed in 360 degrees, the included angle between the oil beams sprayed by two symmetrical oil spray holes is called as the oil injector spray cone angle, in this embodiment, two symmetrical first oil spray holes of the first oil spray hole form the oil injector spray cone angle of the first oil spray hole,
with continued reference to fig. 3, based on the above embodiment, the included angle of the generatrix of the central boss mesa 300 is α, and the spray cone angle of the oil injector is greater than the included angle α of the generatrix, so that the first oil jet is sprayed toward the generatrix of the central boss mesa 300 and then enters the swirl combustion chamber 100.
Further, with continued reference to fig. 3, on the basis of the above embodiment, the opening diameter of the plume combustion chamber 100 is d, the depth of the plume combustion chamber 100 is h, and the ratio of the opening diameter d to the depth h is 25% to 30%;
the cylinder diameter of the cylinder in which the swirl combustion chamber 100 is located is D, and the ratio of the opening diameter D to the cylinder diameter D is 75-85%.
On the basis of the above embodiments, the present embodiment provides a shape of the swirl combustion chamber 100 formed on the piston 200, such as the body of the piston 200 shown in fig. 1, and the swirl combustion chamber 100 is symmetrical around the center of the piston 200.
Example four
The fourth embodiment of the invention provides a vehicle, which comprises the swirl combustion chamber provided by any embodiment of the invention, and has the corresponding functions and beneficial effects of the swirl combustion chamber, wherein the swirl combustion chamber is used for executing the fuel injection method of the swirl combustion chamber provided by any embodiment of the invention.
The combustion chamber of the diesel engine on the vehicle is designed into the swirl combustion chamber of the embodiment of the invention, and the axial section of the swirl combustion chamber is provided with a profile
And the first oil beam sprayed by the first oil spray opening is controlled to move to the throat position of the swirl combustion chamber along the inner wall of the swirl combustion chamber, the second oil beam sprayed by the second oil spray opening moves towards the throat position, and the first oil beam and the second oil beam collide at the throat position. The problem of insufficient combustion of fuel in the combustion chamber is solved, and the beneficial effects of promoting atomization of fuel injection in the combustion chamber by utilizing impact of two kinds of oil beams, accelerating combustion speed in a cylinder and reducing fuel consumption are achieved.
EXAMPLE five
In some embodiments, the method of fuel injection for a plume combustor may be implemented as a computer program tangibly embodied on a computer readable storage medium. Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuitry, Field Programmable Gate Arrays (FPGAs), Application Specific Integrated Circuits (ASICs), Application Specific Standard Products (ASSPs), system on a chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be performed. A computer program can execute entirely on a machine, partly on a machine, as a stand-alone software package partly on a machine and partly on a remote machine or entirely on a remote machine or server.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic, speech, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a back-end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), Wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical host and VPS service are overcome.
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired results of the technical solution of the present invention can be achieved.
The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A method of injecting fuel into a swirl chamber having an axial cross-sectional profile
The style of calligraphy, the plume combustion chamber cooperation sprayer uses, the sprayer has first nozzle and second nozzle, its characterized in that includes:
acquiring a target oil injection duration of the swirl combustion chamber, a first oil injection starting point, a first oil injection end point, a current oil injection starting point and a current oil injection end point of a first oil injection port;
determining a first oil injection duration of the first oil injection port according to the first oil injection starting point and the first oil injection end point, and determining a current oil injection duration of the first oil injection port according to the current oil injection starting point and the current oil injection end point;
respectively determining a first target oil injection duration of the first oil injection port and a second target oil injection duration of a second oil injection port according to the target oil injection duration, the first oil injection duration and the current oil injection duration;
determining a first target fuel injection duration of the first fuel injection port and a second target fuel injection duration of the second fuel injection port according to the target fuel injection duration, the first fuel injection duration and the current fuel injection duration, respectively, wherein the method comprises the following steps:
if the target oil injection duration is greater than the first oil injection duration, determining that the first target oil injection duration of the first oil injection port is the first oil injection duration, and the second target oil injection duration of the second oil injection port is the difference value between the target oil injection duration and the first oil injection duration;
and if the target oil injection duration is less than or equal to the first oil injection duration, determining the first target oil injection duration of the first oil injection port as the current oil injection duration.
2. The method of injecting fuel into a swirl combustor of claim 1, wherein obtaining a target fuel injection duration for the swirl combustor comprises:
the method comprises the steps of obtaining rail pressure, circulating fuel injection quantity and fuel injector flow of an engine when the engine is in a current working condition point, and determining a target fuel injection duration of a swirl combustion chamber according to the rail pressure, the circulating fuel injection quantity and the fuel injector flow based on a Bernoulli equation.
3. The method of injecting fuel into a swirl combustor of claim 1, wherein said current start of injection is no earlier than said first start of injection and said current end of injection is no later than said first end of injection.
4. The method of injecting fuel into a plume combustor of claim 1, further comprising:
the first oil injection port executes oil injection operation according to the first target oil injection duration, and the second oil injection port executes oil injection operation according to the second target oil injection duration.
5. A plume combustion chamber, characterized in that it is used to carry out the method of fuel injection of the plume combustion chamber according to any one of claims 1 to 4;
the inner wall of the swirl combustion chamber comprises a central boss table surface positioned in the center and arc surfaces connected to the periphery of the central boss table surface; a first oil beam sprayed by a first oil spray opening of the oil sprayer moves to a throat position of the swirl combustion chamber along the inner wall of the swirl combustion chamber, a second oil beam sprayed by a second oil spray opening of the oil sprayer faces the throat position, and the first oil beam and the second oil beam collide at the throat position;
if the target oil injection duration of the swirl combustion chamber is greater than the first oil injection duration of the first oil injection port, determining that the first target oil injection duration of the first oil injection port is the first oil injection duration, and the second target oil injection duration of the second oil injection port is the difference value between the target oil injection duration and the first oil injection duration;
and if the target oil injection duration is less than or equal to the first oil injection duration, determining that the first target oil injection duration of the first oil injection port is the current oil injection duration of the first oil injection port.
6. The plume combustion chamber of claim 5 wherein the first fuel injector comprises a first plurality of fuel injectors and the second fuel injector comprises a second plurality of fuel injectors, the first and second fuel injectors being identical.
7. The plume combustion chamber of claim 6 wherein the included angle of the generatrix of the central boss mesa is α;
two symmetrical first oil spray holes of the first oil spray opening form an oil sprayer spray cone angle of the first oil spray opening, and the oil sprayer spray cone angle is larger than the included angle alpha of the bus.
8. A vehicle comprising the plume combustion chamber of any one of claims 5 to 7.
9. A computer readable storage medium storing computer instructions for causing a processor to perform the method of fuel injection for a plume combustion chamber as claimed in any one of claims 1 to 4 when executed.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210174142.4A CN114233505B (en) | 2022-02-25 | 2022-02-25 | Method for injecting fuel into a swirl combustion chamber, vehicle and storage medium |
| PCT/CN2023/070957 WO2023160274A1 (en) | 2022-02-25 | 2023-01-06 | Oil injection method for swirl combustion chamber, swirl combustion chamber, vehicle, and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210174142.4A CN114233505B (en) | 2022-02-25 | 2022-02-25 | Method for injecting fuel into a swirl combustion chamber, vehicle and storage medium |
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| CN114233505A CN114233505A (en) | 2022-03-25 |
| CN114233505B true CN114233505B (en) | 2022-05-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002276375A (en) * | 2001-03-21 | 2002-09-25 | Isuzu Motors Ltd | Combustion system for diesel engine |
| JP2002349267A (en) * | 2001-05-28 | 2002-12-04 | Isuzu Motors Ltd | Combustion system of diesel engine |
| JP2016540915A (en) * | 2013-10-15 | 2016-12-28 | ノストラム エナジー ピーティーイー．リミテッドＮｏｓｔｒｕｍ Ｅｎｅｒｇｙ Ｐｔｅ．Ｌｔｄ． | Gas-assisted fluid atomization injector |
| CN110145405A (en) * | 2019-04-23 | 2019-08-20 | 上海交通大学 | The double injected petrol lean-combustion engines of perforated plate type atomizer |
| JP7379966B2 (en) * | 2019-09-10 | 2023-11-15 | マツダ株式会社 | Diesel engine control device |
| CN111520247B (en) * | 2020-03-25 | 2022-05-10 | 吉利汽车研究院（宁波）有限公司 | Method and system for determining air-fuel ratio based on injection pulse width of oil injector |
| CN111734522B (en) * | 2020-07-23 | 2024-04-26 | 南京工业大学 | Combustion chamber of n-octanol internal combustion engine for combustion |
| CN212479397U (en) * | 2020-07-23 | 2021-02-05 | 南京工业大学 | Combustion chamber of n-octanol internal combustion engine for combustion |
| CN112879146A (en) * | 2021-01-25 | 2021-06-01 | 华中科技大学 | Main and auxiliary fuel injector system suitable for high-power-density diesel engine |
| CN113123892B (en) * | 2021-06-17 | 2021-08-20 | 潍柴动力股份有限公司 | Control method of combustion system, combustion system and engine |
| CN114233505B (en) * | 2022-02-25 | 2022-05-20 | 潍柴动力股份有限公司 | Method for injecting fuel into a swirl combustion chamber, vehicle and storage medium |
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| WO2023160274A1 (en) | 2023-08-31 |
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