CN116378839A - Engine control method and device, engine and vehicle - Google Patents

Engine control method and device, engine and vehicle Download PDF

Info

Publication number
CN116378839A
CN116378839A CN202310486109.XA CN202310486109A CN116378839A CN 116378839 A CN116378839 A CN 116378839A CN 202310486109 A CN202310486109 A CN 202310486109A CN 116378839 A CN116378839 A CN 116378839A
Authority
CN
China
Prior art keywords
temperature
engine
speed
water inlet
preset
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310486109.XA
Other languages
Chinese (zh)
Inventor
翟长辉
徐文娟
覃瀛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Weichai Power Co Ltd
Original Assignee
Weichai Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Weichai Power Co Ltd filed Critical Weichai Power Co Ltd
Priority to CN202310486109.XA priority Critical patent/CN116378839A/en
Publication of CN116378839A publication Critical patent/CN116378839A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • F02D41/08—Introducing corrections for particular operating conditions for idling
    • F02D41/086—Introducing corrections for particular operating conditions for idling taking into account the temperature of the engine
    • 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
    • F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
    • F02B43/10—Engines or plants characterised by use of other specific gases, e.g. acetylene, oxyhydrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/02—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
    • F02D19/025—Failure diagnosis or prevention; Safety measures; Testing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
    • F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
    • F02D31/001—Electric control of rotation speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • 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
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0027—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures the fuel being gaseous
    • 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
    • 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
    • F02D41/068—Introducing corrections for particular operating conditions for engine starting or warming up for warming-up
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
    • F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
    • F02M21/0242—Shut-off valves; Check valves; Safety valves; Pressure relief valves
    • 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
    • F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
    • F02B43/10—Engines or plants characterised by use of other specific gases, e.g. acetylene, oxyhydrogen
    • F02B2043/103—Natural gas, e.g. methane or LNG used as a fuel
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

The present invention relates to the field of vehicle control technologies, and in particular, to an engine control method and apparatus, an engine, and a vehicle. The engine control method includes: obtaining an initial water inlet temperature of the pressure reducing valve; comparing the initial water inlet temperature with a preset temperature; if the initial water inlet temperature is greater than or equal to the preset temperature, the engine works normally; if the initial water inlet temperature is smaller than the preset temperature, the rotating speed of the engine is increased until the water inlet temperature is larger than or equal to the preset temperature, and the engine works normally. The engine speed is increased, the water temperature can be quickly increased to the preset temperature, so that the waiting time of normal operation of the engine can be reduced, in addition, the engine can be normally operated after the water temperature is more than or equal to the preset temperature, normal running of the engine can be prevented when the water temperature does not reach the preset temperature, the pressure reducing valve can be protected, and the pressure reducing valve is prevented from entering water with lower temperature to cause icing faults.

Description

Engine control method and device, engine and vehicle
Technical Field
The present invention relates to the field of vehicle control technologies, and in particular, to an engine control method and apparatus, an engine, and a vehicle.
Background
CNG automobiles require the use of natural gas pressure reducing valves, which function to convert high pressure gas in a high pressure gas tank to low pressure gas. Wherein CNG (compressed natural gas) can expand fast and absorb a large amount of heat around from high pressure chamber to low pressure chamber, leads to temperature decline, frosting and icing, and relief pressure valve freezes light then reduces its working property and leads to the air feed insufficient and engine power unstable, and heavy then damages parts such as case, diaphragm and valve body, shortens relief pressure valve life, still can cause the potential safety hazard if there is gas leakage. In this regard, the pressure reducing valve is provided with a heating device for the air cavity, the water outlet pipe of the engine is communicated with the water inlet of the pressure reducing valve, and the fuel gas is heated by using engine cooling liquid.
In the prior art, an engine water outlet pipe is directly communicated with a pressure reducing valve water inlet, the temperature of an air cavity of the pressure reducing valve is limited by the temperature of engine water outlet, especially the temperature of the water outlet is lower when the engine is just started in cold seasons, and in order to reduce the frosting and icing risk of the pressure reducing valve, the cooling liquid needs to be raised to the normal working temperature through an idling warm car for a period of time, so that the time is long; and the idling time is controlled manually, if the idling does not enable the water temperature to rise to the normal temperature, the vehicle can normally run, and the icing fault of the pressure reducing valve is easy to cause.
Therefore, there is a need for an engine control method, an engine control device, an engine and a vehicle to solve the above-mentioned technical problems.
Disclosure of Invention
The invention aims to provide an engine control method and device, an engine and a vehicle, and aims to reduce frosting and icing faults of a pressure reducing valve.
To achieve the purpose, the invention adopts the following technical scheme:
an engine control method for water heating in an engine, comprising:
obtaining an initial water inlet temperature of the pressure reducing valve;
comparing the initial water inlet temperature with a preset temperature; if the initial water inlet temperature is greater than or equal to the preset temperature, the engine works normally; if the initial water inlet temperature is smaller than the preset temperature, the rotating speed of the engine is increased until the water inlet temperature is larger than or equal to the preset temperature, and the engine works normally.
As a preferable technical scheme of the engine control method, if the initial water inlet temperature is smaller than the preset temperature, increasing the engine speed until the water inlet temperature is greater than or equal to the preset temperature comprises:
obtaining a temperature difference value between the preset temperature and the initial water inlet temperature, determining the temperature lifting times, and carrying out stepwise lifting on the water inlet temperature according to the temperature lifting times until the water inlet temperature is lifted to the preset temperature; the engine speed is increased stepwise according to the temperature increasing times, the current engine speed is equal to the sum of the product of the preset increasing speed and the current temperature increasing times and the original engine speed, and the current water inlet temperature is equal to the sum of the product of the temperature value of each increasing time and the current temperature increasing times and the initial water inlet temperature; the temperature value of each lifting is obtained by the temperature difference value and the temperature lifting times, the preset increasing speed is a fixed value, and the original engine rotating speed is an idle rotating speed.
As a preferable technical scheme of the engine control method, after the rotating speed is increased each time, the rotating speed after the increase is compared with the limit rotating speed, and the rotating speed of the current engine is determined according to the comparison result.
As a preferable technical scheme of the engine control method, if the increased rotation speed is greater than the limit rotation speed, the engine rotates according to the limit rotation speed; and if the increased rotating speed is less than or equal to the limit rotating speed, the transmitter rotates according to the increased rotating speed.
As a preferable technical scheme of the engine control method, if the initial water inlet temperature is less than a preset temperature, increasing the engine speed includes:
and obtaining a temperature difference value between a preset temperature and a water inlet temperature, and obtaining an engine lifting rotating speed based on the temperature difference value, wherein the temperature difference value and the engine lifting rotating speed are in a mapping relation, and the sum of the engine lifting rotating speed and the current rotating speed is less than or equal to a limit rotating speed.
The invention also provides an engine control device, comprising:
the temperature acquisition module is used for acquiring the initial water inlet temperature of the pressure reducing valve;
and the speed lifting execution module is used for increasing the rotating speed of the engine until the water inlet temperature is greater than or equal to the preset temperature when the initial water inlet temperature is less than the preset temperature, and the engine works normally.
As a preferable embodiment of the engine control device, the speed-up executing module includes:
the temperature difference determining module is used for determining the temperature increasing times and obtaining a temperature difference value between a preset temperature and an initial water inlet temperature, and the initial water temperature is increased according to the temperature increasing times;
and the speed increase determining module is used for determining the current engine speed, wherein the current engine speed is equal to the sum of the product of the preset increase speed and the temperature increase times and the original engine speed, the water inlet temperature is increased in a step manner in the temperature increase process, and the engine speed is increased in a step manner.
The invention also provides an engine, and the engine control method according to any one of the schemes is used for controlling the temperature rise of circulating water in the pressure reducing valve.
The invention also provides a vehicle comprising the engine according to any one of the schemes.
The invention has the beneficial effects that:
the engine speed is increased, the water temperature can be quickly increased to the preset temperature, so that the waiting time of normal operation of the engine can be reduced, in addition, the engine can be normally operated after the water temperature is more than or equal to the preset temperature, normal running of the engine can be prevented when the water temperature does not reach the preset temperature, the pressure reducing valve can be protected, and the pressure reducing valve is prevented from entering water with lower temperature to cause icing faults.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings needed in the description of the embodiments of the present invention, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the contents of the embodiments of the present invention and these drawings without inventive effort for those skilled in the art.
FIG. 1 is a main step diagram of an engine control method according to an embodiment of the present invention;
FIG. 2 is a detailed step diagram of an engine control method according to an embodiment of the present invention;
fig. 3 is a block diagram of an engine control apparatus according to an embodiment of the present invention.
In the figure:
301. a temperature acquisition module; 302. and a speed lifting execution module.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
The pressure reducer in the prior art can ensure that gas fuel stably enters the engine, and stable pressure control ensures that the fuel mixing ratio is strictly and accurately, so that the normal operation of a vehicle is ensured. The prior art discloses an electronic heating control device of a natural gas pressure reducing valve for a natural gas automobile. The ceramic heater is arranged on the outer side of the high-pressure chamber, and the heat-insulating shell is arranged on the outer side of the ceramic heater and is made of heat-insulating materials and is arranged in the metal shell. The heat preservation shell is a hollow shell, a preheating water inlet and a preheating water outlet which are respectively communicated with the cavity inside the heat preservation shell are arranged on the heat preservation shell, and a high-pressure gas inlet and a high-pressure gas outlet which are communicated with the inside of the high-pressure chamber are arranged on the heat preservation shell. Before the automobile is started, the high-pressure chamber (the inside of the high-pressure chamber is in a low-pressure state at the moment) is heated by the ceramic heater, the high-pressure switch is turned on to enable high-pressure natural gas to enter the high-pressure chamber through the high-pressure gas inlet, surrounding heat is required to be absorbed by the natural gas when the high pressure is changed into low pressure, the ceramic heater provides heat energy for the high-pressure chamber at the moment, and the converted natural gas is subjected to low pressure and smoothly enters the second-stage decompression through the high-pressure gas outlet. The high pressure chamber is not communicated with the internal air conditioner, so that the water and air are prevented from being mixed.
The water outlet pipe of the engine is directly communicated with the water inlet of the pressure reducing valve, so that the temperature of the air cavity of the pressure reducing valve is the same as the temperature of the water outlet of the engine, and particularly, the temperature of the water outlet is lower when the engine is just started in cold seasons, and the icing fault of the pressure reducing valve is easy to cause. For this reason, the present embodiment provides an engine control method for raising the temperature of water inside an engine to reduce the frosting and icing failure of a pressure reducing valve.
As shown in fig. 1, the engine control method mainly includes:
s101, obtaining an initial water inlet temperature of a pressure reducing valve;
the water inlet of the pressure reducing valve is communicated with the water outlet of the engine, so that the water inlet temperature of the pressure reducing valve is the same as the water outlet temperature of the engine on the premise of not considering the heat loss of the pipeline. The initial inlet water temperature for the pressure reducing valve may be obtained by a temperature sensor provided at the water outlet of the engine, but may of course also be obtained by a temperature sensor provided at the water inlet of the pressure reducing valve, or by a temperature sensor on a line communicating the water inlet of the pressure reducing valve with the water outlet of the engine.
In this embodiment, the inlet water temperature is preferably obtained using a temperature sensor provided at the inlet of the pressure reducing valve.
S102, comparing the initial water inlet temperature with a preset temperature; if the initial water inlet temperature is greater than or equal to the preset temperature, the engine works normally; if the initial water inlet temperature is smaller than the preset temperature, the rotating speed of the engine is increased until the water inlet temperature is larger than or equal to the preset temperature, and the engine works normally.
The engine speed is increased, the water temperature can be quickly increased to the preset temperature, the preset temperature is the target temperature, so that the waiting time of normal operation of the engine can be reduced, in addition, the engine can be normally operated after the water temperature is more than or equal to the preset temperature, normal running of the water temperature can be prevented without reaching the preset temperature, the pressure reducing valve can be protected, and the pressure reducing valve is prevented from entering water with lower temperature to cause icing faults.
Further, if the initial water inlet temperature is less than the preset temperature, increasing the engine speed until the water inlet temperature is greater than or equal to the preset temperature includes:
obtaining a temperature difference value between the preset temperature and the initial water inlet temperature, determining the temperature lifting times, and carrying out stepwise lifting on the water inlet temperature according to the temperature lifting times until the water inlet temperature is lifted to the preset temperature; the engine speed is increased stepwise according to the temperature increasing times, the current engine speed is equal to the sum of the product of the preset increasing speed and the current temperature increasing times and the original engine speed, and the current water inlet temperature is equal to the sum of the product of the temperature value of each increasing time and the current temperature increasing times and the initial water inlet temperature; the temperature value of each lifting is obtained by the temperature difference value and the temperature lifting times, the preset increasing speed is a fixed value, and the original engine rotating speed is an idle rotating speed.
For example, the initial water inlet temperature is T1, the preset water temperature is T, the initial water temperature is smaller than the preset water temperature, the difference between the preset water temperature and the initial water temperature is T, the initial water temperature needs to be raised N times from the initial water temperature to the preset water temperature, and each time the initial water temperature is raised by M ℃, wherein t=t1+t×n, wherein n=1, 2, 3, … and N. It can be understood that after the temperature is raised for N times and the temperature of M ℃ is raised each time, the actually obtained water inlet temperature is more than or equal to the preset temperature, and when the actually obtained metal temperature reaches the preset temperature, the engine is operated normally. The original engine speed is V1, the preset increasing speed is V2, the current engine speed is V3, wherein v3=v1+v2×n, wherein n=1, 2, 3, …, N. The primary engine speed is idle speed and may be selected from 550rpm-800 rpm. The present embodiment is not particularly limited.
In this embodiment, the number of lifts corresponding to the temperature difference is obtained based on the correspondence between the temperature difference and the number of lifts. That is, the temperature difference value and the lifting times are in one-to-one correspondence, and the temperature can be lifted for multiple times in each heating process, and the temperature value of each lifting is the same. For example, the correspondence between the temperature difference and the number of lifts, such as map or data table, may be determined by simulation or experimental calibration.
In some embodiments, the temperature value of each boost is the same during a single heating of the engine; of course, in other embodiments, the corresponding elevated temperature values are different for a single engine heating. For example, at an initial inlet water temperature of 10 ℃, the temperature value of each boost is 10 ℃, while at an initial inlet water temperature of 30 ℃, the temperature value of each boost is 8 ℃, and the temperature value of each boost can be obtained according to multiple tests.
The rotational speed cannot exceed the limit rotational speed during the rising process, and if so, the engine is considered to be operating normally. For this purpose, further, after each increase of the rotation speed, the increased rotation speed is compared with the limit rotation speed, and the rotation speed of the current engine is determined according to the comparison result.
In this embodiment, the preset temperature may be set to 60℃and each time 10℃is raised, the preset increase rate is 100rpm, and the limit rotation rate is 1000rpm.
Further, if the increased rotation speed is greater than the limit rotation speed, the engine rotates according to the limit rotation speed; and if the increased rotating speed is less than or equal to the limit rotating speed, the transmitter rotates according to the increased rotating speed. Therefore, the energy waste caused by the overhigh rotation speed of the engine can be prevented.
Of course, in other embodiments, if the initial inlet water temperature is less than the preset temperature, increasing the engine speed includes: and obtaining a temperature difference value between a preset temperature and a water inlet temperature, and obtaining an engine lifting rotating speed based on the temperature difference value, wherein the temperature difference value and the engine lifting rotating speed are in a mapping relation, and the sum of the engine lifting rotating speed and the current rotating speed is smaller than or equal to a limit rotating speed. That is, the engine determines the rotation speed according to the temperature difference, and the engine works according to the determined rotation speed until the water inlet temperature is greater than or equal to the preset temperature. The temperature difference value and the engine lifting rotating speed are in one-to-one correspondence, and the correspondence between the temperature difference value and the engine lifting rotating speed, such as a map or a data table, can be determined through simulation or experimental calibration. However, the rotational speed cannot exceed the limit rotational speed, so that the waste of energy sources caused by the excessive rotational speed of the engine can be prevented.
In the present embodiment, the engine ECU obtains the initial intake water temperature and controls the engine speed. The temperature sensor regularly obtains the water inlet temperature of the pressure reducing valve, and the engine works normally after the water inlet temperature reaches the preset temperature.
As shown in fig. 2, the method specifically includes the following steps:
s201, starting;
s202, obtaining the initial water inlet temperature of the pressure reducing valve;
s203, judging whether the initial water inlet temperature is smaller than a preset temperature, if yes, executing S204, and if not, executing S209;
s204, determining the temperature increasing times, and obtaining a temperature difference value between a preset temperature and an initial water inlet temperature, wherein the water inlet temperature is increased stepwise according to the temperature increasing times; the engine speed is increased stepwise according to the temperature increasing times, the current engine speed is equal to the sum of the product of the preset increasing speed and the current temperature increasing times and the original engine speed, and the current water inlet temperature is equal to the sum of the product of the temperature value of each increasing time and the current temperature increasing times and the initial water inlet temperature;
s205, judging whether the current rotating speed is larger than the limit rotating speed, if so, executing S206, and if not, executing S207;
s206, the engine rotates according to the limit rotation speed, and S208 is executed;
s207, the engine rotates according to the sum of the product of the preset increasing speed and the current temperature increasing times and the original engine speed, and the engine speed is obtained;
s208, the water inlet temperature is greater than or equal to a preset temperature;
s209, the engine works normally.
There is also provided in an embodiment of the present invention an engine control apparatus, as shown in fig. 3, including a temperature acquisition module 301 and a speed-up execution module 302, wherein the temperature acquisition module 301 is configured to acquire an initial intake water temperature of a pressure reducing valve; the speed-up executing module 302 is configured to increase the engine speed when the initial inlet water temperature is determined to be less than the preset temperature, until the inlet water temperature is greater than or equal to the preset temperature, and the engine works normally.
More specifically, the speed-up executing module 302 includes a temperature field determining module and a speed-up determining module, where the temperature difference determining module is configured to determine a number of temperature-up times and obtain a temperature difference between a preset temperature and an initial water inlet temperature, and the initial water temperature is increased according to the number of temperature-up times; the speed increase determination module is configured to determine a current engine speed, wherein the current engine speed is equal to a sum of a product of a preset increase speed and a number of temperature increases and an original engine speed. The temperature of the inlet water increases stepwise in the temperature rising process, and the rotating speed of the engine increases stepwise; namely, when the water inlet temperature increases, the rotating speed increases. The speed lifting execution module can determine the rotation speed of the engine according to the temperature difference, and improves the water temperature rising capacity.
The embodiment also provides an engine, which uses the engine control method provided by the embodiment to control the temperature rise of the circulating water in the pressure reducing valve. Because the engine control method is used, the engine according to the embodiment of the present invention has all the advantages and benefits of the above embodiment, and will not be described herein.
The embodiment also provides a vehicle, which comprises the engine provided by the embodiment. Since the engine is included, the vehicle according to the embodiment of the present invention has all the advantages and benefits of the above embodiment, and will not be described here again.
Furthermore, the foregoing description of the preferred embodiments and the principles of the invention is provided herein. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims (10)

1. An engine control method for controlling the temperature rise of water in an engine, comprising:
obtaining an initial water inlet temperature of the pressure reducing valve;
comparing the initial water inlet temperature with a preset temperature; if the initial water inlet temperature is greater than or equal to the preset temperature, the engine works normally; if the initial water inlet temperature is smaller than the preset temperature, the rotating speed of the engine is increased until the water inlet temperature is larger than or equal to the preset temperature, and the engine works normally.
2. The engine control method according to claim 1, wherein if the initial intake water temperature is less than a preset temperature, increasing the engine speed until the intake water temperature is greater than or equal to the preset temperature comprises:
obtaining a temperature difference value between the preset temperature and the initial water inlet temperature, determining the temperature lifting times, and carrying out stepwise lifting on the water inlet temperature according to the temperature lifting times until the water inlet temperature is lifted to the preset temperature; the engine speed is increased stepwise according to the temperature increasing times, the current engine speed is equal to the sum of the product of the preset increasing speed and the current temperature increasing times and the original engine speed, and the current water inlet temperature is equal to the sum of the product of the temperature value of each increasing time and the current temperature increasing times and the initial water inlet temperature; the temperature value of each lifting is obtained by the temperature difference value and the temperature lifting times, the preset increasing speed is a fixed value, and the original engine rotating speed is an idle rotating speed.
3. The engine control method according to claim 2, characterized in that the number of lifts corresponding to the temperature difference is obtained based on a correspondence relationship between the temperature difference and the number of lifts.
4. The engine control method according to claim 2, wherein after each increase in the rotational speed, the magnitude of the increased rotational speed is compared with the magnitude of the limit rotational speed, and the rotational speed of the current engine is determined based on the result of the comparison.
5. The engine control method according to claim 4, wherein if the increased rotational speed is greater than the limit rotational speed, the engine is rotated in accordance with the limit rotational speed; and if the increased rotating speed is less than or equal to the limit rotating speed, the transmitter rotates according to the increased rotating speed.
6. The engine control method of claim 1, wherein increasing the engine speed if the initial intake water temperature is less than a preset temperature comprises:
and obtaining a temperature difference value between a preset temperature and a water inlet temperature, and obtaining an engine lifting rotating speed based on the temperature difference value, wherein the temperature difference value and the engine lifting rotating speed are in a mapping relation, and the sum of the engine lifting rotating speed and the current rotating speed is less than or equal to a limit rotating speed.
7. An engine control apparatus, comprising:
the temperature acquisition module is used for acquiring the initial water inlet temperature of the pressure reducing valve;
and the speed lifting execution module is used for increasing the rotating speed of the engine until the water inlet temperature is greater than or equal to the preset temperature when the initial water inlet temperature is less than the preset temperature, and the engine works normally.
8. The engine control device according to claim 7, characterized in that the speed-up execution module includes:
the temperature difference determining module is used for determining the temperature increasing times and obtaining a temperature difference value between a preset temperature and an initial water inlet temperature, and the initial water temperature is increased according to the temperature increasing times;
and the speed increase determining module is used for determining the current engine speed, wherein the current engine speed is equal to the sum of the product of the preset increase speed and the temperature increase times and the original engine speed, the water inlet temperature is increased in a step manner in the temperature increase process, and the engine speed is increased in a step manner.
9. An engine, characterized in that the temperature rise of circulating water inside a pressure reducing valve is controlled using the engine control method according to any one of claims 1 to 6.
10. A vehicle comprising an engine as claimed in claim 9.
CN202310486109.XA 2023-05-04 2023-05-04 Engine control method and device, engine and vehicle Pending CN116378839A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310486109.XA CN116378839A (en) 2023-05-04 2023-05-04 Engine control method and device, engine and vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310486109.XA CN116378839A (en) 2023-05-04 2023-05-04 Engine control method and device, engine and vehicle

Publications (1)

Publication Number Publication Date
CN116378839A true CN116378839A (en) 2023-07-04

Family

ID=86967571

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310486109.XA Pending CN116378839A (en) 2023-05-04 2023-05-04 Engine control method and device, engine and vehicle

Country Status (1)

Country Link
CN (1) CN116378839A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6026789A (en) * 1997-06-23 2000-02-22 Honda Giken Kogyo Kabushiki Kaisha Regulator for gas fuel engine
EP1154146A2 (en) * 2000-05-11 2001-11-14 Deere & Company Heating device in particular for gaseous fuels
CN204755115U (en) * 2015-06-19 2015-11-11 潍柴西港新能源动力有限公司 Heat transfer pressure relief device of engine natural gas
JP2020105910A (en) * 2018-12-26 2020-07-09 マツダ株式会社 Intake temperature control device for engine
CN113153549A (en) * 2021-04-07 2021-07-23 东风柳州汽车有限公司 Control method and system for improving performance of engine after starting and storage medium

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6026789A (en) * 1997-06-23 2000-02-22 Honda Giken Kogyo Kabushiki Kaisha Regulator for gas fuel engine
EP1154146A2 (en) * 2000-05-11 2001-11-14 Deere & Company Heating device in particular for gaseous fuels
CN204755115U (en) * 2015-06-19 2015-11-11 潍柴西港新能源动力有限公司 Heat transfer pressure relief device of engine natural gas
JP2020105910A (en) * 2018-12-26 2020-07-09 マツダ株式会社 Intake temperature control device for engine
CN113153549A (en) * 2021-04-07 2021-07-23 东风柳州汽车有限公司 Control method and system for improving performance of engine after starting and storage medium

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张付军, 郝利君, 黄英, 葛蕴珊, 孙业保: "电控顺序喷射天然气专用发动机的开发", 汽车工程, no. 05, 31 December 2000 (2000-12-31), pages 338 - 341 *

Similar Documents

Publication Publication Date Title
JP2002364925A (en) Hybrid water-heater
CN106285917A (en) A kind of diesel engine starting aid system being applicable to high altitude localities and method
CN106374122A (en) Residual heat utilization system of fuel cell and control method
WO2010057421A1 (en) Cooling system for testing lifetime of hybrid power vehicle controller
CN110828866B (en) Cooling circulation system of vehicle-mounted fuel cell and control method thereof
CN111287864A (en) Automobile-used LNG feed system
CN210087514U (en) Diesel oil low pressure oil feeding system for commercial vehicle
CN108266259B (en) Control method of cooling system and vehicle
EP1231092B1 (en) Reducing number of engine stop-start cycles in a hybrid electric vehicle
CN106401834A (en) Low-temperature heating system for diesel engine
JP3960524B2 (en) Gas fuel supply device for vehicles
CN111554954A (en) Fuel cell cold start assembly, vehicle and control method
CN114883611B (en) Fuel cell low-temperature start control system and method
CN110566382B (en) Automobile air inlet heating control system and method
CN105317584A (en) Energy recovery system and method for automobile engine
CN102865167B (en) Air inlet control method for diesel engine
CN109973262B (en) Water heating type double-cavity oil tank control system based on intelligent control
CN116378839A (en) Engine control method and device, engine and vehicle
EP3548794B1 (en) A fuel tank arrangement
JP2009121404A (en) Cogeneration system using hydrogen engine
CN214616824U (en) Thermal cycle oil supply unit
CN102562376A (en) Intelligent heat exchange system for diesel engines
CN204024862U (en) A kind of petrol engine low-temperature pre-heating device
CN103072448B (en) LNG (liquefied natural gas) automobile air-conditioning refrigeration system
KR100376677B1 (en) A pre-heating method of cooling water for diesel engines

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination