CN114233496A - Oil injection method and device for cold start of diesel engine and electronic equipment - Google Patents
Oil injection method and device for cold start of diesel engine and electronic equipment Download PDFInfo
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- CN114233496A CN114233496A CN202111517534.8A CN202111517534A CN114233496A CN 114233496 A CN114233496 A CN 114233496A CN 202111517534 A CN202111517534 A CN 202111517534A CN 114233496 A CN114233496 A CN 114233496A
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- 238000002347 injection Methods 0.000 title claims abstract description 80
- 239000007924 injection Substances 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 55
- 239000000446 fuel Substances 0.000 claims abstract description 31
- 239000007858 starting material Substances 0.000 claims description 11
- 125000004122 cyclic group Chemical group 0.000 claims description 6
- 239000003921 oil Substances 0.000 description 57
- 239000002283 diesel fuel Substances 0.000 description 12
- 230000007613 environmental effect Effects 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
- F02D41/064—Introducing corrections for particular operating conditions for engine starting or warming up for starting at cold start
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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
- F02D41/3011—Controlling fuel injection according to or using specific or several modes of combustion
- F02D41/3017—Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used
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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
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
Abstract
The invention provides an oil injection method and device for cold start of a diesel engine and electronic equipment, wherein the method comprises the following steps: acquiring the ambient temperature and voltage of the diesel engine; judging whether the diesel engine meets a preset conventional starting condition or not according to the environment temperature and the voltage; if not, determining a cold start strategy according to a preset temperature range of the environment temperature; the cold start strategies corresponding to different preset temperature ranges are different; therefore, the cold start capability of the electric control diesel engine is improved by adding a fuel injection strategy in the cold start process on the basis of not changing any structure and hardware of the engine.
Description
Technical Field
The invention belongs to the technical field of cold start, and particularly relates to an oil injection method and device for cold start of a diesel engine and electronic equipment.
Background
In winter, especially in severe cold areas, the low ambient temperature causes the intake air temperature to drop, the capacity of the accumulator to decrease, and the viscosity of the lubricating oil to increase, which causes the diesel engine to be difficult to start.
In order to improve the cold start performance of the diesel engine, people in the industry have made many researches in this aspect, however, when the diesel engine is started under a low temperature condition, the temperature and the pressure of the compression end working medium are lower due to lower inlet air temperature and lower combustion chamber temperature. Meanwhile, the piston movement speed is low during starting, so that the air leakage loss is increased, and the temperature of the compression end point is reduced, so that the fuel atomization and ignition conditions are poor, and the cold starting of the diesel engine is difficult.
That is to say, in the cold start process of the diesel engine, the temperature in the cylinder is very low, and the diesel oil is difficult to ignite, and the fuel injection according to the conventional fuel injection strategy can cause the unburned diesel oil to be liquefied in the cylinder to aggravate the difficulty of cold start, so that a vicious circle is formed, and the vehicle is difficult to start.
Disclosure of Invention
In view of the above, the present invention provides a fuel injection method and apparatus for a cold start of a diesel engine, and an electronic device, which are used to increase a cold start capability of an electronically controlled diesel engine by adding a fuel injection strategy during the cold start process without changing any structure and hardware of the engine.
The application discloses in a first aspect a method for cold start injection of a diesel engine, comprising:
acquiring the ambient temperature and voltage of the diesel engine;
judging whether the diesel engine meets a preset conventional starting condition or not according to the environment temperature and the voltage;
if not, determining a cold start strategy according to a preset temperature range of the environment temperature;
wherein the preset temperature range includes: a first preset temperature range, a second preset temperature range and a third preset temperature range; the cold start strategies corresponding to the first preset temperature range, the second preset temperature range and the third preset temperature range are different.
Optionally, in the oil injection method for cold start of the diesel engine, judging whether the diesel engine meets a preset conventional start condition according to the ambient temperature and the voltage includes:
judging whether the environment temperature is lower than a first preset temperature or not;
if the ambient temperature is lower than a first preset temperature, judging whether the voltage is higher than a preset voltage or not; if so, judging that the diesel engine does not meet the preset conventional starting condition; if not, judging that the diesel engine meets a preset conventional starting condition;
and if the ambient temperature is higher than the first preset temperature, judging that the diesel engine meets the preset conventional starting condition.
Optionally, in the injection method for cold start of a diesel engine, before determining a cold start strategy according to a preset temperature range where the ambient temperature is located, the method further includes:
the rotational speed of an engine in the diesel engine is detected.
Optionally, in the oil injection method for cold start of the diesel engine, the determining a cold start strategy according to a preset temperature range of the ambient temperature includes:
oil is not injected within a preset time after the diesel engine is started, and a starter of the diesel engine drives the engine to idle, so that the temperature in an engine cylinder is raised;
after the preset time, adopting a cold start oil injection strategy until the rotating speed of the engine reaches a preset ratio range of normal idle speed, and adopting a preset normal oil injection strategy; the cold start oil injection strategy comprises the steps of injecting oil according to a first preset oil quantity for a first preset time, waiting for a second preset time, and performing cyclic reciprocation;
and the preset time and the preset ratio range corresponding to different temperature ranges are different.
Optionally, in the oil injection method for cold start of the diesel engine, the preset time corresponding to the temperature range with lower temperature is longer than the preset time corresponding to the temperature range with higher temperature;
the lower preset proportion range is larger than the higher preset proportion range.
The application second aspect discloses a fueling injection equipment of diesel engine cold start-up includes:
the acquisition unit is used for acquiring the ambient temperature and the voltage of the diesel engine;
the judging unit is used for judging whether the diesel engine meets a preset conventional starting condition or not according to the environment temperature and the voltage;
the cold starting unit is used for determining a cold starting strategy according to the preset temperature range of the environment temperature if the judgment result of the judging unit is negative;
wherein the preset temperature range includes: a first preset temperature range, a second preset temperature range and a third preset temperature range; the cold start strategies corresponding to the first preset temperature range, the second preset temperature range and the third preset temperature range are different.
Optionally, in the fuel injection device for cold start of the diesel engine, the determining unit is configured to, when determining whether the diesel engine meets a preset conventional start condition according to the ambient temperature and the voltage, specifically:
judging whether the environment temperature is lower than a first preset temperature or not;
if the ambient temperature is lower than a first preset temperature, judging whether the voltage is higher than a preset voltage or not; if so, judging that the diesel engine does not meet the preset conventional starting condition; if not, judging that the diesel engine meets a preset conventional starting condition;
and if the ambient temperature is higher than the first preset temperature, judging that the diesel engine meets the preset conventional starting condition.
Optionally, in the fuel injection device for cold start of the diesel engine, the obtaining unit is further configured to:
the rotational speed of an engine in the diesel engine is detected.
Optionally, in the fuel injection device for cold start of the diesel engine, when the cold start unit is configured to determine a cold start strategy according to a preset temperature range where the ambient temperature is located, the cold start unit is specifically configured to:
oil is not injected within a preset time after the diesel engine is started, and a starter of the diesel engine drives the engine to idle, so that the temperature in an engine cylinder is raised;
after the preset time, adopting a cold start oil injection strategy until the rotating speed of the engine reaches a preset ratio range of normal idle speed, and adopting a preset normal oil injection strategy; the cold start oil injection strategy comprises the steps of injecting oil according to a first preset oil quantity for a first preset time, waiting for a second preset time, and performing cyclic reciprocation;
and the preset time corresponding to the temperature range is different from the preset ratio range.
A third aspect of the present application discloses an electronic device, comprising:
one or more processors;
a storage device having one or more programs stored thereon;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement a method of cold start injection for a diesel engine as described in any one of the first aspects of the present application.
According to the technical scheme, the oil injection method for the cold start of the diesel engine, provided by the invention, comprises the following steps: acquiring the ambient temperature and voltage of the diesel engine; judging whether the diesel engine meets a preset conventional starting condition or not according to the environment temperature and the voltage; if not, determining a cold start strategy according to a preset temperature range of the environment temperature; the cold start strategies corresponding to different preset temperature ranges are different; therefore, the cold start capability of the electric control diesel engine is improved by adding a fuel injection strategy in the cold start process on the basis of not changing any structure and hardware of the engine.
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 introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of a method for injecting fuel during cold start of a diesel engine according to an embodiment of the present invention;
FIG. 2 is a flow chart of another method for cold-start injection of a diesel engine according to an embodiment of the present invention;
FIG. 3 is a flow chart of another method for cold-start injection of a diesel engine according to an embodiment of the present invention;
FIG. 4 is a flow chart of another method for cold-start injection of a diesel engine according to an embodiment of the present invention;
FIG. 5 is a flow chart of another method for cold-start injection of a diesel engine according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a fuel injection device for cold start of a diesel engine according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
In this application, 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 phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiment of the application provides an oil injection method for cold start of a diesel engine, which is used for solving the problems that in the cold start process of the diesel engine in the prior art, the temperature in an air cylinder is very low, diesel oil is difficult to ignite, and the difficulty of liquefaction and aggravation of cold start of unburned diesel oil in the air cylinder can be caused according to the conventional oil injection strategy, so that vicious circle is formed, and the start is difficult.
Referring to fig. 1, the injection method for cold start of the diesel engine comprises the following steps:
and S101, acquiring the ambient temperature and voltage of the diesel engine.
It should be noted that the ambient temperature and voltage can be obtained by sensors. Specifically, the ambient temperature of the diesel engine is collected through a temperature sensor; and collecting the voltage of the diesel engine through a voltage sensor.
The voltage of the diesel engine can be the voltage of a battery for supplying power to the diesel engine. Of course, other values are also possible, and are not described in detail herein, and all of them are within the protection scope of the present application, depending on the actual situation.
And S102, judging whether the diesel engine meets a preset conventional starting condition or not according to the ambient temperature and the voltage.
It should be noted that when the diesel engine meets the preset conventional starting condition, the conventional starting strategy is directly adopted, and when the diesel engine does not meet the preset conventional starting condition, the cold starting strategy is required.
The conventional starting strategy is normal mainly for the following cold starting strategy, if the vehicle is started, the fuel is normally injected as in the conventional environment, the normal diesel is injected, and the electric control diesel engine only needs to calibrate the injection quantity, so that the conventional starting strategy is only required to recover to a certain injection quantity and cancel the calibration of the injection at every other time after the condition is met.
Therefore, if the diesel engine does not satisfy the preset normal starting condition, step S103 is performed.
S103, determining a cold start strategy according to a preset temperature range of the environment temperature.
Wherein, predetermine the temperature range and include: a first preset temperature range, a second preset temperature range and a third preset temperature range; the cold start strategies corresponding to the first preset temperature range, the second preset temperature range and the third preset temperature range are different.
Note that, the cold start is: the engine is started under the condition that the water temperature is lower than the engine oil temperature; that is, the cold start strategy is: and (3) starting the engine under the condition that the water temperature is lower than the engine oil temperature.
Specifically, when the ambient temperature is within a first preset temperature range, determining the ambient temperature as a first cold start strategy; when the ambient temperature is within a second preset temperature range, determining a second cold start strategy; and determining to be a third cold start strategy when the ambient temperature is in a third preset temperature range.
The first, second and third predetermined temperature ranges may be adjacent and non-overlapping ranges. That is, the first preset temperature range, the second preset temperature range, and the third preset temperature range are combined into one continuous range.
Specifically, the first preset temperature range can be a range with an upper limit value of-30 ℃ and a lower limit value of-35 ℃; the second preset temperature range can be a range with an upper limit value of-35 ℃ and a lower limit value of-40 ℃; the third preset temperature range may be a range having an upper limit value of infinitesimal and a lower limit value of-40 ℃.
Of course, the selection of each preset temperature range is not limited to the above examples, and the details are not repeated here, and all of them are within the protection scope of the present application depending on the actual situation.
In the embodiment, the ambient temperature and the voltage of the diesel engine are acquired; judging whether the diesel engine meets a preset conventional starting condition or not according to the ambient temperature and the voltage; if not, determining a cold start strategy according to a preset temperature range of the environment temperature; the cold start strategies corresponding to different preset temperature ranges are different; therefore, the cold start capability of the electric control diesel engine is improved by adding a fuel injection strategy in the cold start process on the basis of not changing any structure and hardware of the engine.
In practical application, referring to fig. 2, step S102, determining whether the diesel engine meets a preset conventional starting condition according to the ambient temperature and the voltage includes:
s201, judging whether the ambient temperature is lower than a first preset temperature.
If the ambient temperature is less than the first preset temperature, executing step S202; if the ambient temperature is greater than the first predetermined temperature, step S204 is executed.
S202, judging whether the voltage is larger than a preset voltage or not.
If yes, go to step S203; otherwise, go to step S204.
And S203, judging that the diesel engine does not meet the preset conventional starting condition.
And S204, judging that the diesel engine meets a preset conventional starting condition.
Specifically, the first preset temperature may be-30 ℃, and of course, may also be other values, which are not described herein again one by one, and are all within the protection scope of the present application.
The preset voltage is not specifically limited herein, as long as the preset voltage can represent whether the voltage is normal or not, and the preset voltage is within the protection scope of the present application.
That is, firstly, judging whether the environmental temperature is lower than-30 ℃, if the environmental temperature is not lower than-30 ℃, performing the operation according to a conventional starting strategy; when the environmental temperature is lower than minus 30 ℃, the voltage is judged, if the power supply voltage is judged to be lower, in order to ensure that the voltage requirement of a starter for dragging an engine can be met, the conventional starting strategy is carried out, and the starting opportunity waste caused by low voltage is avoided.
In practical applications, as shown in fig. 3, before determining the cold start strategy according to the preset temperature range of the ambient temperature in step S103, the method further includes:
s301, detecting the rotation speed of the engine in the diesel engine.
The rotation speed of the engine may be detected by a rotation speed sensor, or may be calculated.
The specific process of detecting the rotating speed of the engine in the diesel engine is not repeated one by one here, and the process is determined according to actual conditions and is within the protection range of the application.
In practical applications, referring to fig. 4, the step S103 of determining the cold start strategy according to the preset temperature range of the ambient temperature includes:
s401, oil is not injected within the preset time after the diesel engine is started, and the starter of the diesel engine drives the engine to idle, so that the temperature in the engine cylinder is raised.
It should be noted that, when the diesel engine is started, i.e. after the key is ignited, the oil injection is delayed, only the air is acted, the function of air inlet heating is fully utilized, and the temperature in the cylinder is raised.
The specific value of the preset time is not repeated here, and is determined according to the actual situation, and is within the protection scope of the present application.
In addition, the preset time corresponding to different temperature ranges is different. That is, the preset time corresponding to the first preset temperature range is T1, the preset time corresponding to the second preset temperature range is T2, and the preset time corresponding to the third preset temperature range is T3; t1, T2 and T3 are mutually different in pairs.
S402, after the preset time, adopting a cold start oil injection strategy until the rotating speed of the engine reaches a preset ratio range of normal idle speed, and adopting a preset normal oil injection strategy.
The cold start oil injection strategy is to inject the oil according to a first preset oil quantity for a first preset time, wait for a second preset time and perform cyclic reciprocation. Specifically, the fuel injection method comprises the steps of injecting fuel according to a first preset fuel quantity for a first preset time, waiting for a second preset time, returning to execute the first preset fuel quantity for the first preset time, waiting for the second preset time, and so on.
And the preset proportion ranges corresponding to different temperature ranges are different. That is, the preset occupation ratio range corresponding to the first preset temperature range is D1, the preset occupation ratio range corresponding to the second preset temperature range is D2, and the preset occupation ratio range corresponding to the third preset temperature range is D3; d1, D2 and D3 are mutually different in pairs.
It should be noted that the first preset time and the second preset time are for increasing the cold start capability, and the determination criterion is that the start is faster when the temperature is low, and the start is better at a lower temperature, which has an effect shown by the test result.
The first predetermined amount of oil is a smaller amount of oil than the amount of oil at normal start-up. The small oil quantity interval oil injection can provide heat at a lower dragging rotating speed, the quantity of unburned diesel oil is reduced, and the unburned diesel oil can be emptied at intervals.
In practical application, the preset time corresponding to the temperature range with lower temperature is longer than the preset time corresponding to the temperature range with higher temperature;
the lower preset proportion range is larger than the higher preset proportion range.
In the embodiment, the cold start capability of the diesel engine is optimized by adding a fuel injection strategy, and the structure of the engine is not required to be changed; has no influence on the actual use experience of the user.
As shown in fig. 5, the injection method for cold start of the diesel engine is explained in a practical application scenario:
when the T15 is powered on, the environmental temperature and the voltage value of the storage battery are detected, whether the environmental temperature is lower than minus 30 ℃ or not is judged firstly, unsatisfied conditions are carried out according to a conventional starting strategy, when the environmental temperature is lower than minus 30 ℃, the voltage is judged, if the voltage is judged to be lower, in order to ensure that the voltage requirement of a starter for dragging an engine can be met, the voltage is carried out according to the conventional starting strategy, and the problem that starting opportunities are wasted due to low voltage is avoided.
When the environment temperature is lower than-30 ℃ and the power supply voltage is normal, different starting strategies are entered based on the environment temperature:
1. t environment temperature is more than or equal to minus 35 ℃ and less than minus 30 ℃, oil is not injected in the first 4s after the key is ignited, the starter drives the engine to idle, work is done through compressed air, intake air is fully utilized for heating, and the temperature in the engine cylinder is raised; after 4s, the small oil quantity is firstly injected for the time of t1s, so that the phenomenon that excessive unburnt diesel oil is increased under the conditions of low dragging rotating speed and low in-cylinder temperature is avoided, after the injection is stopped, the small oil quantity is injected for the time of t1s again after the interval of t2s, the in-cylinder temperature is continuously raised, the unburnt diesel oil in the previous cycle is emptied, and the interval small oil quantity injection strategy is repeated until the rotating speed of the engine reaches 30% -35% of the normal idling speed, and then the engine normally injects oil.
2. T environment temperature is more than or equal to minus 40 ℃ and less than minus 35 ℃, oil is not injected in the first 5s after the key is ignited, the starter drives the engine to idle, work is done through compressed air, intake air is fully utilized for heating, and the temperature in the engine cylinder is raised; after 5s, the small oil quantity is firstly injected for the time of t1s, so that the phenomenon that excessive unburnt diesel oil is increased under the conditions of low dragging rotating speed and low in-cylinder temperature is avoided, after the injection is stopped, the small oil quantity is injected again for the time of t1s after the interval of t2s, the in-cylinder temperature is continuously raised, the unburnt diesel oil in the previous cycle is emptied, and the interval small oil quantity injection strategy is repeated until the rotating speed of the engine reaches 35% -40% of the normal idling speed, and then normal oil injection is carried out.
3. The temperature of the T environment is lower than-40 ℃, oil is not injected in the first 6s after the key is ignited, the starter drives the engine to idle, work is done through compressed air, intake air is fully utilized for heating, and the temperature in the engine cylinder is increased; after 6s, the small oil quantity is firstly injected for the time of t1s, so that the phenomenon that excessive unburnt diesel oil is increased under the conditions of low dragging rotating speed and low in-cylinder temperature is avoided, after the injection is stopped, the small oil quantity is injected for the time of t1s again after the interval of t2s, the in-cylinder temperature is continuously raised, the unburnt diesel oil in the previous cycle is emptied, and the interval small oil quantity injection strategy is repeated until the rotating speed of the engine reaches 35% -40% of the normal idling speed, and then the engine normally injects oil.
It should be noted that the normal oil injection is: the diesel engine is controlled to only calibrate the quantity of the injected fuel, so that the diesel engine can recover to a certain injected fuel quantity and cancel the calibration of the injection of every other time as long as the condition is met.
The application further provides a fuel injection device for cold start of the diesel engine.
Referring to fig. 6, the fuel injection apparatus for cold start of a diesel engine includes:
and the acquisition unit 10 is used for acquiring the ambient temperature and the voltage of the diesel engine.
And the judging unit 20 is used for judging whether the diesel engine meets the preset conventional starting condition or not according to the ambient temperature and the voltage.
The cold start unit 30 is configured to determine a cold start policy according to a preset temperature range of the ambient temperature if the determination result of the determining unit 20 is negative;
wherein, predetermine the temperature range and include: a first preset temperature range, a second preset temperature range and a third preset temperature range; the cold start strategies corresponding to the first preset temperature range, the second preset temperature range and the third preset temperature range are different.
For details of the working process and principle of each unit, reference is made to the oil injection method for cold start of the diesel engine provided by the above embodiment, and details are not repeated here and are all within the protection scope of the present application.
In the present embodiment, the acquisition unit 10 acquires the ambient temperature and voltage of the diesel engine; the judging unit 20 judges whether the diesel engine meets a preset conventional starting condition or not according to the environmental temperature and the voltage; the cold start unit 30, if the judgment result of the judgment unit 20 is negative, determining a cold start strategy according to the preset temperature range of the environment temperature; the cold start strategies corresponding to different preset temperature ranges are different; therefore, the cold start capability of the electric control diesel engine is improved by adding a fuel injection strategy in the cold start process on the basis of not changing any structure and hardware of the engine.
In practical applications, the determining unit 20 is configured to, when determining whether the diesel engine meets the preset conventional starting condition according to the ambient temperature and the voltage, specifically:
and judging whether the ambient temperature is less than a first preset temperature.
If the ambient temperature is lower than the first preset temperature, judging whether the voltage is higher than a preset voltage or not; if so, judging that the diesel engine does not meet the preset conventional starting condition; if not, the diesel engine is judged to meet the preset conventional starting condition.
And if the ambient temperature is higher than the first preset temperature, judging that the diesel engine meets the preset conventional starting condition.
In practical applications, the obtaining unit 10 is further configured to:
the rotational speed of an engine in a diesel engine is detected.
In practical applications, the cold start unit 30 is specifically configured to, when determining the cold start policy according to a preset temperature range where the ambient temperature is located:
the diesel engine does not spray oil within the preset time after being started, and the starter of the diesel engine drives the engine to idle, so that the temperature in the engine cylinder is increased.
After the preset time, adopting a cold start oil injection strategy until the rotating speed of the engine reaches a preset ratio range of normal idle speed, and adopting a preset normal oil injection strategy; the cold start oil injection strategy is to inject the oil according to a first preset oil quantity for a first preset time, wait for a second preset time and perform cyclic reciprocation.
And the preset time corresponding to the temperature range is different from the preset ratio range.
For details of the working processes and principles of the units, reference is made to the oil injection method for cold start of the diesel engine provided by the embodiment, and details are not repeated here and are all within the protection scope of the present application.
Another embodiment of the present application provides an electronic device, including:
one or more processors.
A storage device having one or more programs stored thereon.
When the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the injection method for the cold start of the diesel engine as provided in any one of the embodiments above.
For details of the specific working process and principle of the processor, reference is made to the oil injection method for cold start of the diesel engine provided by the above embodiment, and details are not repeated here and are all within the protection scope of the present application.
Features described in the embodiments in the present specification may be replaced with or combined with each other, and the same and similar portions among the embodiments may be referred to each other, and each embodiment is described with emphasis on differences from other embodiments. In particular, the system or system embodiments are substantially similar to the method embodiments and therefore are described in a relatively simple manner, and reference may be made to some of the descriptions of the method embodiments for related points. The above-described system and system embodiments are only illustrative, wherein the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. 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 invention. Thus, the present invention 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. A fuel injection method for cold start of a diesel engine is characterized by comprising the following steps:
acquiring the ambient temperature and voltage of the diesel engine;
judging whether the diesel engine meets a preset conventional starting condition or not according to the environment temperature and the voltage;
if not, determining a cold start strategy according to a preset temperature range of the environment temperature;
wherein the preset temperature range includes: a first preset temperature range, a second preset temperature range and a third preset temperature range; the cold start strategies corresponding to the first preset temperature range, the second preset temperature range and the third preset temperature range are different.
2. The diesel engine cold start oil injection method according to claim 1, wherein judging whether the diesel engine meets a preset conventional starting condition according to the ambient temperature and the voltage comprises:
judging whether the environment temperature is lower than a first preset temperature or not;
if the ambient temperature is lower than a first preset temperature, judging whether the voltage is higher than a preset voltage or not; if so, judging that the diesel engine does not meet the preset conventional starting condition; if not, judging that the diesel engine meets a preset conventional starting condition;
and if the ambient temperature is higher than the first preset temperature, judging that the diesel engine meets the preset conventional starting condition.
3. The method for injecting fuel during cold start of a diesel engine according to claim 1, wherein before determining the cold start strategy according to the preset temperature range of the ambient temperature, the method further comprises:
the rotational speed of an engine in the diesel engine is detected.
4. The method for injecting fuel during cold start of a diesel engine according to claim 3, wherein said determining a cold start strategy according to a preset temperature range of the ambient temperature comprises:
oil is not injected within a preset time after the diesel engine is started, and a starter of the diesel engine drives the engine to idle, so that the temperature in an engine cylinder is raised;
after the preset time, adopting a cold start oil injection strategy until the rotating speed of the engine reaches a preset ratio range of normal idle speed, and adopting a preset normal oil injection strategy; the cold start oil injection strategy comprises the steps of injecting oil according to a first preset oil quantity for a first preset time, waiting for a second preset time, and performing cyclic reciprocation;
and the preset time and the preset ratio range corresponding to different temperature ranges are different.
5. The oil injection method for the cold start of the diesel engine as claimed in claim 4, wherein the preset time corresponding to the temperature range with the lower temperature is longer than the preset time corresponding to the temperature range with the higher temperature;
the lower preset proportion range is larger than the higher preset proportion range.
6. The utility model provides a fuel injection device of diesel engine cold start which characterized in that includes:
the acquisition unit is used for acquiring the ambient temperature and the voltage of the diesel engine;
the judging unit is used for judging whether the diesel engine meets a preset conventional starting condition or not according to the environment temperature and the voltage;
the cold starting unit is used for determining a cold starting strategy according to the preset temperature range of the environment temperature if the judgment result of the judging unit is negative;
wherein the preset temperature range includes: a first preset temperature range, a second preset temperature range and a third preset temperature range; the cold start strategies corresponding to the first preset temperature range, the second preset temperature range and the third preset temperature range are different.
7. The fuel injection device for the cold start of the diesel engine according to claim 6, wherein the determining unit is configured to, when determining whether the diesel engine meets a preset conventional starting condition according to the ambient temperature and the voltage, specifically:
judging whether the environment temperature is lower than a first preset temperature or not;
if the ambient temperature is lower than a first preset temperature, judging whether the voltage is higher than a preset voltage or not; if so, judging that the diesel engine does not meet the preset conventional starting condition; if not, judging that the diesel engine meets a preset conventional starting condition;
and if the ambient temperature is higher than the first preset temperature, judging that the diesel engine meets the preset conventional starting condition.
8. The fuel injection apparatus for cold start of diesel engine according to claim 6, wherein said obtaining unit is further configured to:
the rotational speed of an engine in the diesel engine is detected.
9. The fuel injection device for the cold start of the diesel engine according to claim 8, wherein the cold start unit is configured to, when determining the cold start strategy according to a preset temperature range in which the ambient temperature is located, specifically:
oil is not injected within a preset time after the diesel engine is started, and a starter of the diesel engine drives the engine to idle, so that the temperature in an engine cylinder is raised;
after the preset time, adopting a cold start oil injection strategy until the rotating speed of the engine reaches a preset ratio range of normal idle speed, and adopting a preset normal oil injection strategy; the cold start oil injection strategy comprises the steps of injecting oil according to a first preset oil quantity for a first preset time, waiting for a second preset time, and performing cyclic reciprocation;
and the preset time corresponding to the temperature range is different from the preset ratio range.
10. An electronic device, comprising:
one or more processors;
a storage device having one or more programs stored thereon;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the method for cold start injection of a diesel engine as recited in any one of claims 1-5.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115355100A (en) * | 2022-09-22 | 2022-11-18 | 潍柴动力股份有限公司 | Engine cold start control method and device, generator set and storage medium |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5752488A (en) * | 1995-12-15 | 1998-05-19 | Ngk Spark Plug Co., Ltd. | Method of controlling start of engine and device for carrying out the same |
| KR19990020414A (en) * | 1997-08-30 | 1999-03-25 | 정몽규 | Cold start device and method of automobile |
| US6354256B1 (en) * | 1999-12-24 | 2002-03-12 | Mobile Climate Control Industries, Inc. | Cold starting aid system for an internal combustion engine and method of start-up sequencing for same |
| US20070068485A1 (en) * | 2005-09-29 | 2007-03-29 | James Hilditch | Fuel injection strategy for reduced cold start emission from direct injection gasoline engines |
| WO2008071670A1 (en) * | 2006-12-11 | 2008-06-19 | Renault S.A.S | Method for improving the cold-start of a diesel engine |
| US20100012068A1 (en) * | 2008-07-03 | 2010-01-21 | International Engine Intellectual Property Company , Llc | Prioritizing Use Of Engine Cold Start Aids To mitigate Effect Of Weakened Battery Bank |
| CN105863864A (en) * | 2016-05-03 | 2016-08-17 | 清华大学 | Cold-start and small-load combustion control system and method for low-temperature combustion engine |
| US20180252176A1 (en) * | 2015-09-24 | 2018-09-06 | Cummins Power Generation Limited | Systems and method for enabling quick cold starting |
| US10156219B1 (en) * | 2017-11-27 | 2018-12-18 | GM Global Technology Operations LLC | Method for controlling spark timing in a cold start condition for an engine in a vehicle propulsion system and controller for executing the method |
| US20190226419A1 (en) * | 2014-10-23 | 2019-07-25 | Xiangjin Zhou | Hybrid combustion mode of internal combustion engine and controller thereof, internal combustion engine, and automobile |
-
2021
- 2021-12-13 CN CN202111517534.8A patent/CN114233496B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5752488A (en) * | 1995-12-15 | 1998-05-19 | Ngk Spark Plug Co., Ltd. | Method of controlling start of engine and device for carrying out the same |
| KR19990020414A (en) * | 1997-08-30 | 1999-03-25 | 정몽규 | Cold start device and method of automobile |
| US6354256B1 (en) * | 1999-12-24 | 2002-03-12 | Mobile Climate Control Industries, Inc. | Cold starting aid system for an internal combustion engine and method of start-up sequencing for same |
| US20070068485A1 (en) * | 2005-09-29 | 2007-03-29 | James Hilditch | Fuel injection strategy for reduced cold start emission from direct injection gasoline engines |
| WO2008071670A1 (en) * | 2006-12-11 | 2008-06-19 | Renault S.A.S | Method for improving the cold-start of a diesel engine |
| US20100012068A1 (en) * | 2008-07-03 | 2010-01-21 | International Engine Intellectual Property Company , Llc | Prioritizing Use Of Engine Cold Start Aids To mitigate Effect Of Weakened Battery Bank |
| US20190226419A1 (en) * | 2014-10-23 | 2019-07-25 | Xiangjin Zhou | Hybrid combustion mode of internal combustion engine and controller thereof, internal combustion engine, and automobile |
| US20180252176A1 (en) * | 2015-09-24 | 2018-09-06 | Cummins Power Generation Limited | Systems and method for enabling quick cold starting |
| CN105863864A (en) * | 2016-05-03 | 2016-08-17 | 清华大学 | Cold-start and small-load combustion control system and method for low-temperature combustion engine |
| US10156219B1 (en) * | 2017-11-27 | 2018-12-18 | GM Global Technology Operations LLC | Method for controlling spark timing in a cold start condition for an engine in a vehicle propulsion system and controller for executing the method |
Non-Patent Citations (3)
| Title |
|---|
| 李春萍;闫文俊;杨宏强;张微;刘全双;俞道云;: "非道路电控单体泵柴油机低温启动的探究", 拖拉机与农用运输车, no. 03, pages 28 - 30 * |
| 沃傲波;徐剑飞;丁晓兴;费栋梁;王波;: "自主电控高压共轨柴油机冷起动控制策略研究", 现代车用动力, no. 02, pages 48 - 51 * |
| 蒋齐秦;刘伍权;朱岩;伏广功;夏旭;: "车用柴油机冷起动燃烧过程研究及相关技术分析", 小型内燃机与车辆技术, no. 05, pages 87 - 92 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115355100A (en) * | 2022-09-22 | 2022-11-18 | 潍柴动力股份有限公司 | Engine cold start control method and device, generator set and storage medium |
| CN115355100B (en) * | 2022-09-22 | 2024-01-16 | 潍柴动力股份有限公司 | Engine cold start control method and device, generator set and storage medium |
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