CN112253342A - Engine cold start warm-up control system and method - Google Patents
Engine cold start warm-up control system and method Download PDFInfo
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- CN112253342A CN112253342A CN202011061102.6A CN202011061102A CN112253342A CN 112253342 A CN112253342 A CN 112253342A CN 202011061102 A CN202011061102 A CN 202011061102A CN 112253342 A CN112253342 A CN 112253342A
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- 239000000446 fuel Substances 0.000 claims abstract description 208
- 239000000498 cooling water Substances 0.000 claims abstract description 91
- 238000001816 cooling Methods 0.000 claims abstract description 60
- 230000008569 process Effects 0.000 claims abstract description 17
- 230000007613 environmental effect Effects 0.000 claims abstract description 5
- 239000003921 oil Substances 0.000 claims description 142
- 239000000295 fuel oil Substances 0.000 claims description 60
- 238000010438 heat treatment Methods 0.000 claims description 46
- 239000007788 liquid Substances 0.000 claims description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 35
- 238000005485 electric heating Methods 0.000 claims description 15
- 239000000110 cooling liquid Substances 0.000 claims description 12
- 238000004064 recycling Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 3
- 239000002283 diesel fuel Substances 0.000 description 6
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- 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
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
- F02M31/12—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating electrically
- F02M31/125—Fuel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
- B60H1/04—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant from cooling liquid of the plant
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- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
- F02N19/04—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines
- F02N19/10—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines by heating of engine coolants
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/66—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
- H01M10/663—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells the system being an air-conditioner or an engine
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- General Engineering & Computer Science (AREA)
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Abstract
The invention belongs to the technical field of cold starting of engines, and particularly relates to a cold-start preheating control system of an engine, which comprises an engine preheating system, a battery preheating system and an electric control system, wherein the electric control system is used for determining a fuel preheating system and a cooling preheating system in the engine system and respective working time of the battery preheating system according to environmental temperature and engine starting conditions, respectively preheating fuel, cooling water and a storage battery of the engine according to the working time of each preheating system before the engine is started, judging whether to perform secondary preheating according to the fuel temperature, the cooling water temperature and the storage battery temperature in the running process of the engine, and performing secondary preheating by controlling the corresponding preheating system until the fuel temperature, the cooling water temperature and the storage battery temperature meet the normal running requirements of the engine. The preheating operation in the scheme of the invention has high automation degree, and is convenient, quick and convenient to control.
Description
Technical Field
The invention relates to the technical field of cold start of engines, in particular to a system and a method for controlling preheating of cold start of an engine.
Background
At present, the crane engine can not be started in extremely cold regions due to the phenomena of too low air inlet temperature, low-temperature power shortage of a storage battery, wax accumulation of fuel oil and the like.
In order to solve the problem of cold start of a heavy vehicle high-power diesel engine under an extremely cold condition, auxiliary cold start measures such as starting liquid filling, cooling medium heating, lubricating oil heating or storage battery heat preservation need to be additionally arranged on the vehicle, tests show that the measures can obviously improve the low-temperature start effect of the high-power diesel engine to a certain extent, but can only meet the cold start of the environment temperature above minus 30 ℃, and have requirements on the brand number of the used diesel oil under different environment temperatures, so that the cost of a user is higher.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a system and a method for controlling preheating of an engine in cold start.
The technical scheme is as follows:
a cold start preheating control system of an engine comprises an engine preheating system, a battery preheating system and an electric control system;
the engine preheating system comprises a fuel preheating system for preheating fuel entering the engine and a cooling preheating system for preheating cooling water in the engine;
the electric control system is respectively electrically connected with the fuel preheating system, the cooling preheating system and the battery preheating system, and is used for determining the respective working time of the fuel preheating system, the cooling preheating system and the battery preheating system according to the environmental temperature and the starting condition of the engine, respectively carrying out primary preheating on the fuel, the cooling water and the storage battery of the engine according to the working time of each preheating system before the engine is started, judging whether secondary preheating is carried out according to the fuel temperature, the cooling water temperature and the storage battery temperature in the running process of the engine, and carrying out secondary preheating work by controlling the corresponding preheating system until the fuel temperature, the cooling water temperature and the storage battery temperature meet the normal running requirements of the engine.
Preferably, the fuel preheating system comprises a fuel sensor with a heating function, a first oil pipe heater, a fuel filter and a second oil pipe heater which are sequentially communicated through an oil pipe;
the fuel sensor is arranged at an oil outlet of the oil tank, a PTC heating body is arranged in the fuel sensor, and the fuel sensor is used for heating fuel sucked out of the oil tank when being electrified;
the oil pipe heater comprises an electric heating wire and a temperature control element, wherein the first oil pipe heater is communicated with the fuel filter through a first preheating oil pipe, the electric heating wire of the first oil pipe heater is inserted into the first preheating oil pipe, the electric heating wire is used for heating fuel in the first preheating oil pipe when the first oil pipe heater is electrified, and the temperature control element is used for collecting the temperature of the fuel in the first preheating oil pipe in real time;
the fuel filter is internally provided with a PTC heating element and a temperature sensor, and is used for heating fuel oil flowing through the fuel filter when being electrified and collecting the temperature of the fuel oil in the fuel filter;
the second oil pipe heater is communicated with the engine through a second preheating oil pipe, an electric heating wire of the second oil pipe heater is inserted into the second preheating oil pipe, the electric heating wire is used for heating fuel oil in the second preheating oil pipe when the second oil pipe heater is powered on, and a temperature control element of the second oil pipe heater is used for collecting the temperature of the fuel oil in the second preheating oil pipe in real time.
Preferably, the oil inlet end of the fuel filter is further provided with an oil temperature sensor, the oil temperature sensor and the first preheating oil pipe are parallelly installed on the same side face of the fuel filter, and the oil temperature sensor is used for collecting the temperature of flowing fuel oil after an engine is started.
Preferably, the cooling preheating system is used for circularly heating cooling water in an engine, and comprises:
the liquid heater is communicated with an oil outlet of the oil tank through an oil pipe with an electric preheating function, the liquid heater sucks fuel oil by using a fuel pump and burns the fuel oil to heat internal cooling liquid when being electrified, and the flow direction of the cooling liquid is controlled by a water pump;
one end of the water outlet pipe is connected with a water outlet of the liquid heater, and the other end of the water outlet pipe is connected with a water inlet of the engine and used for leading cooling liquid heated by the liquid heater into the engine to exchange heat with cooling water in the engine;
and one end of the water return pipe is connected with a water outlet of the engine, and the other end of the water return pipe is connected with a water return port of the liquid heater and used for returning the cooling liquid subjected to heat exchange to the liquid heater for recycling.
Preferably, the battery preheating system is used for circularly heating the storage battery module, and comprises:
the gas heater is communicated with an oil outlet of the oil tank through an oil pipe with an electric preheating function, fuel oil is sucked by the fuel oil pump and is combusted to heat gas inside the gas heater when the gas heater is electrified, and the flow direction of the gas is controlled by the pneumatic pump;
one end of the gas outlet pipe is connected with the gas outlet of the gas heater, and the other end of the gas outlet pipe is connected with the gas inlet of the storage battery module and used for leading the gas heated by the gas heater into the storage battery module and exchanging heat with the storage battery module;
and one end of the air return pipe is connected with the air outlet of the storage battery module, and the other end of the air return pipe is connected with the air return ports of the other heaters, and is used for returning the gas subjected to heat exchange to the gas heater for recycling.
Preferably, the electrical control system comprises:
the main controller is connected with an engine Electronic Control Unit (ECU) through a Controller Area Network (CAN) bus and used for collecting the ambient temperature and the engine temperature, the main controller is also electrically connected with the fuel oil sensor, the first oil pipe heater, the fuel oil filter, the second oil pipe heater, the oil temperature sensor, the liquid heater and the gas heater respectively, under the power supply action of the storage battery module, the main controller collects temperature sensing signals from the elements in real time and controls the power-on and power-off of the elements according to the ambient temperature, the engine temperature and prestored engine starting/running related information;
the display, with main control unit connects for show the fuel preheats the system, the cooling preheats the system and the operating condition of battery preheating system includes: taking the power-on states of the fuel sensor, the first oil pipe heater, the fuel filter and the second oil pipe heater as input, and outputting a working state signal of the fuel preheating system; outputting a working state signal of the cooling and preheating system according to the power-on state of the liquid heater; outputting a working state signal of the battery preheating system according to the power-on state of the gas heater; and the number of the first and second groups,
and the cold start preheating switch is connected with the main controller and is used for starting/stopping the cold start function of the engine by one key.
Preferably, the main controller collects temperature sensing signals from the above elements in real time, and controls the power on and off of the above elements according to the ambient temperature, the engine temperature and pre-stored engine start/operation related information, specifically including:
in the primary preheating stage, according to the corresponding relation between the environment temperature, the engine temperature and the pre-stored engine temperature and the cold start preheating time, the working time of each of the cooling preheating system, the battery preheating system and the fuel oil preheating system is determined, the liquid heater is electrified according to the working time of the cooling preheating system, the gas heater is electrified according to the working time of the battery preheating system, and the fuel oil sensor, the first oil pipe heater, the fuel oil filter and the second oil pipe heater are simultaneously electrified according to the working time of the fuel oil preheating system, so that the primary preheating of the fuel oil, the cooling water and the storage battery of the engine is realized;
and in the secondary preheating stage, the temperature of cooling water, the temperature of fuel oil and the temperature of a storage battery in the running process of the engine are collected, whether the cooling preheating system continues to be electrified to work or not is judged according to a preset cooling water temperature threshold value, whether the fuel oil preheating system continues to be electrified to work or not is judged according to a preset storage battery temperature threshold value, and the secondary preheating work is carried out by controlling the corresponding preheating system, so that the temperature of the cooling water, the temperature of the fuel oil and the temperature of the storage battery are not less than respective threshold values.
In another aspect, the present invention further provides a warm-up control method for cold start of an engine, including:
determining the respective working time of a fuel preheating system, a cooling preheating system and a battery preheating system of the engine according to the environment temperature and the starting condition of the engine, and respectively carrying out primary preheating on the fuel, the cooling water and the storage battery of the engine according to the working time of each preheating system;
starting the engine, judging whether to carry out secondary preheating according to the fuel temperature, the cooling water temperature and the storage battery temperature which are collected in real time in the running process of the engine, and carrying out secondary preheating work by controlling a corresponding preheating system until the fuel temperature, the cooling water temperature and the storage battery temperature meet the normal running requirements of the engine.
Preferably, the engine cold start warm-up control method specifically includes:
step S1, before the engine is not started, ambient temperature T1 is acquired, and,
when the ambient temperature T1 is less than or equal to the cold start ambient temperature T0, executing step S2;
when the ambient temperature T1> the cold-start ambient temperature T0, step S4 is performed;
s2, obtaining the initial water temperature T2 of cooling water in an engine, and determining the working time T1 of the cooling preheating system and the battery preheating system and the working time T2 of the fuel preheating system according to the corresponding relation between the pre-stored initial water temperature of the cooling water and the cold start preheating time;
step S3, the cooling preheating system, the battery preheating system and the fuel preheating system are electrified, primary preheating is respectively carried out on cooling water, a storage battery and fuel of the engine according to the working time of each preheating system determined in the step S2, and each preheating system is powered off after the primary preheating is finished;
in step S4, the engine is started, and,
if the engine is operating normally, go to step S5;
if the starting is not successful, returning to execute the step S2;
and step S5, collecting the temperature of cooling water, the temperature of fuel oil and the temperature of a storage battery in the engine in real time, judging whether to perform secondary preheating according to preset temperature thresholds, and controlling a preheating system to be subjected to secondary preheating to continue electrifying.
Preferably, the determining whether to perform secondary preheating according to the preset temperature thresholds and controlling the preheating system to be subjected to secondary preheating to continue to be powered on to work specifically includes:
step S51, comparing the temperature of the cooling water in the engine with a preset cooling water temperature threshold value,
when the temperature of cooling water in the engine is not less than the temperature threshold of the cooling water, controlling the cooling and preheating system to be powered off, and adjusting the working state of the cooling and preheating system to be a preheating ending state;
when the temperature of cooling water in the running process of the engine is smaller than the temperature threshold of the cooling water, controlling the cooling and preheating system to continue electrifying and work, and simultaneously adjusting the working state of the cooling and preheating system to be a preheating state until the temperature of the cooling water in the engine reaches the temperature threshold of the cooling water;
step S52, comparing the temperature of the storage battery with a preset storage battery temperature threshold value,
when the temperature of the storage battery is not less than the temperature threshold of the storage battery, controlling the battery preheating system to be powered off, and simultaneously adjusting the working state of the battery preheating system to be a preheating ending state;
when the temperature of the storage battery is lower than the temperature threshold of the storage battery, controlling the battery preheating system to continue electrifying and work, and simultaneously adjusting the working state of the battery preheating system to be a preheating state until the temperature of the storage battery reaches the temperature threshold of the storage battery;
step S53, comparing the fuel temperature with a preset fuel temperature threshold value,
when the fuel temperature is not less than the fuel temperature threshold value, controlling the fuel preheating system to be powered off, and meanwhile, controlling the fuel preheating system to be powered off
Adjusting the working state of the heater to be a preheating end state;
and when the fuel temperature is lower than the fuel temperature threshold, controlling the fuel preheating system to continue electrifying and working, and simultaneously adjusting the working state of the fuel preheating system to be a preheating state until the fuel temperature reaches the fuel temperature threshold.
Compared with the prior art, the technical scheme has the following advantages:
(1) the electric controller automatically controls the working time of the fuel preheating system, the cooling preheating system and the battery preheating system to respectively preheat the fuel, the cooling water and the storage battery of the engine, and the preheating operation has high automation degree, is convenient and quick and is convenient to control;
(2) in the running process of the engine, the working state of each preheating system can be adjusted through the temperature of fuel oil, the temperature of cooling water and the temperature of a storage battery, so that the engine is ensured to work under a more proper temperature condition, and the reliability of the engine is improved;
(3) when the system is used for assisting the cold start of the engine, the selection range of the diesel grade of the engine is wider, so that the use cost of a user is reduced.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
FIG. 1 is a schematic diagram of a cold start warm-up control system for an engine;
FIG. 2 is a schematic view of a fuel filter construction;
FIG. 3 is a flow chart schematic of an engine cold start warm-up control method;
FIG. 4 is a schematic diagram of an engine cold start warm-up control method.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
The invention provides an engine cold start preheating control system in a first aspect.
The engine preheating system comprises a fuel preheating system for preheating fuel entering the engine and a cooling preheating system for preheating cooling water in the engine.
The electric control system is respectively electrically connected with the fuel preheating system, the cooling preheating system and the battery preheating system, and is used for determining the respective working time of the fuel preheating system, the cooling preheating system and the battery preheating system according to the environmental temperature and the starting condition of the engine, respectively carrying out primary preheating on the fuel, the cooling water and the storage battery of the engine according to the working time of each preheating system before the engine is started, judging whether secondary preheating is carried out according to the fuel temperature, the cooling water temperature and the storage battery temperature in the running process of the engine, and carrying out secondary preheating work by controlling the corresponding preheating system until the fuel temperature, the cooling water temperature and the storage battery temperature meet the normal running requirements of the engine.
Further, as shown in fig. 1, the fuel preheating system includes a fuel sensor 3 with a heating function and sequentially communicated with a first fuel pipe heater 5, a fuel filter 8 and a second fuel pipe heater 9 through a fuel pipe. The fuel preheating system is provided with a common fuel pipe 4, a first preheating fuel pipe 6 and a second preheating fuel pipe 10.
The fuel sensor 3 is installed at an oil outlet of the oil tank 2, a PTC heating body is arranged in the fuel sensor 3, and the PTC heating body is used for heating fuel sucked out of the oil tank 2 when the PTC heating body is electrified. In the present invention, the PTC heater in the fuel sensor 3 has a length of 200mm and is installed to extend upward from the filter mesh at the bottom of the sensor. The PTC heating element adopts PTC ceramics as a heating material, the heating material has the characteristic that the resistance value is rapidly increased along with the rise of the temperature, and when the environmental temperature is lower than minus 15 ℃, the PTC heating element heats the fuel around the fuel sensor 3 after the fuel sensor is electrified for 4-10 minutes, so that the temperature of the fuel can be increased by 5-10 ℃; when the temperature of the PTC heating element reaches a set temperature value (which is far lower than the ignition point 220 ℃ of diesel oil), the PTC heating element is close to a power-off state, so that the PTC heating element has good safety.
The oil pipe heater comprises an electric heating wire and a temperature control element. The first oil pipe heater 5 is communicated with the fuel filter 8 through a first preheating oil pipe 6, an electric heating wire of the first oil pipe heater 5 is inserted into the first preheating oil pipe 6, the electric heating wire is used for heating fuel in the first preheating oil pipe 6 when the first oil pipe heater is powered on, and a temperature control element of the first oil pipe heater is used for collecting the temperature of the fuel in the first preheating oil pipe 6 in real time.
Be provided with PTC heat-generating body and temperature sensor in the fuel filter 8, be used for the convection current when circular telegram fuel oil that fires oil filter 8 heats, and gathers the fuel temperature in the fuel filter 8. The fuel filter 8 is used for removing solid impurities such as iron oxide, dust and the like in fuel, preventing a fuel preheating system from being blocked, reducing mechanical abrasion, ensuring stable operation of an engine and improving reliability. The fuel filter 8 of the present invention uses PTC ceramic as a built-in heating material, and the PTC ceramic heating material is placed in a fuel passage in the middle of the fuel filter 8 (as shown in fig. 2) for heating fuel flowing through the fuel filter 8.
The second oil pipe heater 9 is communicated with the engine through a second preheating oil pipe 10, an electric heating wire of the second oil pipe heater 9 is inserted into the second preheating oil pipe 10, fuel oil in the second preheating oil pipe 10 is heated by the electric heating wire when the second oil pipe heater is powered on, and the temperature of the fuel oil in the second preheating oil pipe 10 is collected in real time by a temperature control element of the second oil pipe heater.
In the invention, the oil pipe heater adopts an oil-resistant heating wire with a high-resistance Teflon insulating layer, the heating wire generates heat after being electrified to realize a heating function, and the limit tolerance temperature of the insulating layer reaches 200 ℃, so that the oil pipe heater is safe and reliable. The length of the heating wire inserted into the first and second pre-heating oil pipes 6 and 10 is the same as the oil pipe length. When the ambient temperature is lower than minus 15 ℃, the first oil pipe heater 5 and the second oil pipe heater 9 are electrified for 3 to 10 minutes, so that the temperature of fuel oil in the oil pipe is increased by 10 to 15 ℃; and sending a sensing signal to the electric control system through the temperature sensor once the fuel temperature exceeds a preset fuel temperature threshold value.
Further, the oil inlet end of the fuel filter 8 is also provided with an oil temperature sensor 7, the oil temperature sensor 7 and the first preheating oil pipe 6 are parallelly installed on the same side face of the fuel filter 8, and the oil temperature sensor 7 is used for collecting the temperature of flowing fuel oil after the engine is started.
Further, the cooling water preheating device is used for circularly heating cooling water in an engine, and comprises: a liquid heater 13, a water outlet pipe 14 and a water return pipe 15.
The liquid heater 13 is communicated with an oil outlet of the oil tank 2 through oil pipes (11 and 12 in figure 1) with electric preheating function, when the liquid heater 13 is electrified, the fuel pump is used for sucking fuel oil and burning the fuel oil to heat internal cooling liquid, and the flow direction of the cooling liquid is controlled through the water pump. The cooling fluid may be water.
One end of the water outlet pipe 14 is connected with the water outlet of the liquid heater, and the other end of the water outlet pipe is connected with the water inlet of the engine, and is used for guiding the cooling liquid heated by the liquid heater 13 into the engine to exchange heat with the cooling water in the engine, so that the cooling water in the engine is preheated.
One end of the water return pipe 15 is connected with the water outlet of the engine, and the other end is connected with the water return port of the so-called heater, and is used for returning the cooling liquid after heat exchange to the liquid heater 13 for recycling.
In practical application, the capacity of the storage battery is changed along with the ambient temperature and the discharge current, namely, the lower the ambient temperature is, the smaller the battery capacity is; the larger the discharge current, the smaller the battery capacity. Therefore, the lower the ambient temperature is, the more easily the electric quantity of the storage battery is lost. The capacity of the battery can be increased by a factor of two by preheating the battery and increasing the temperature of the electrolyte, which is very necessary for cold starting of the engine.
Further, the battery preheating system is used for circularly heating the storage battery module, and comprises: a gas heater 17, a gas outlet pipe 18 and a gas return pipe 19.
The gas heater 17 is communicated with an oil outlet of the oil tank 2 through oil pipes (11 and 16 in figure 1) with an electric preheating function, the gas heater 17 sucks fuel oil by using a fuel pump when being electrified and burns the fuel oil to heat the gas inside, and the flow direction of the gas is controlled by using a pneumatic pump.
One end of the gas outlet pipe 18 is connected to the gas outlet of the gas heater, and the other end is connected to the gas inlet of the battery module 20, and is configured to introduce the gas heated by the gas heater 17 into the battery module 20, and perform heat exchange with the battery module, thereby preheating the battery module 20.
One end of the air return pipe 19 is connected with the air outlet of the storage battery module 20, and the other end is connected with the air return port of the gas heater, and is used for returning the gas subjected to heat exchange to the gas heater 17 for recycling.
In the present invention, the battery module 20 is composed of a sealed battery frame, a heating air pipe arranged in a separation layer at the bottom of the battery frame, a bottom plate arranged at the bottom of the battery frame, and a battery attached to the bottom plate. The gas heater 17 is started when the power is on, the heated gas enters the heating gas pipe of the storage battery module 20 through the gas outlet pipe 18, the heat of the high-temperature gas is transferred to the storage battery through the bottom plate of the storage battery frame, the gas after heat exchange returns to the gas heater 17 through the gas return pipe 19, and a gas heating cycle is formed, so that the purpose of continuously heating the storage battery is achieved.
And a temperature sensor is also arranged at the gas return end of the gas heater 17 and used for collecting the gas temperature in real time and sending the gas temperature to an electrical control system.
Further, the electrical control system includes: a main controller 21, a display 24 and a cold start preheat switch 23.
The main controller 21 is connected with an engine electronic control unit ECU25 through a CAN bus 22 for collecting the ambient temperature and the engine temperature, the main controller 21 is further respectively electrically connected with the fuel sensor 3, the first oil pipe heater 5, the oil temperature sensor 7, the fuel filter 8, the second oil pipe heater 9, the liquid heater 13 and the gas heater 17, under the power supply action of the storage battery module 20, the main controller 21 collects the temperature sensing signals from the above elements in real time, and controls the power on and off of the above elements according to the ambient temperature, the engine temperature and the pre-stored engine start/operation related information, specifically comprising:
in the primary preheating stage, according to the ambient temperature, the engine temperature and the corresponding relation between the pre-stored engine temperature and the cold start preheating time, the respective working time of the cooling preheating system, the battery preheating system and the fuel oil preheating system is determined, the liquid heater 13 is electrified according to the working time of the cooling preheating system, the gas heater 17 is electrified according to the working time of the battery preheating system, and the fuel oil sensor 3, the first oil pipe heater 5, the fuel oil filter 8 and the second oil pipe heater 9 are simultaneously electrified according to the working time of the fuel oil preheating system, so that the primary preheating of the fuel oil, the cooling water and the storage battery of the engine is realized;
and in the secondary preheating stage, the temperature of cooling water, the temperature of a storage battery and the temperature of fuel in the engine are collected, whether the cooling preheating system continues to be electrified to work or not is judged according to a preset cooling water temperature threshold value, whether the battery preheating system continues to be electrified to work or not is judged according to a preset storage battery temperature threshold value, whether the fuel preheating system continues to be electrified to work or not is judged according to a preset fuel temperature threshold value, and secondary preheating work is carried out by controlling the corresponding preheating system, so that the temperature of the cooling water, the temperature of the storage battery and the temperature of the fuel are not less than.
And, the display 24 is connected with the main controller 21, and is used for displaying the working states of the fuel preheating system, the cooling preheating system and the battery preheating system, and includes:
the power-on states of the fuel sensor 3, the first oil pipe heater 5, the fuel filter 8 and the second oil pipe heater 9 are used as input, and working state signals of the fuel preheating system are output; outputting a working state signal of the cooling and preheating system according to the power-on state of the liquid heater 13; and outputting an operating state signal of the battery preheating system according to the power-on state of the gas heater 17.
According to a specific embodiment, three display lamps corresponding to the fuel preheating system, the cooling preheating system and the battery preheating system are arranged on the display, and the working state of each preheating system is displayed through the color of the display lamps, for example, when the color of the display lamps is changed to green to represent that the corresponding preheating system is in a power-on state, and is changed to yellow to represent that the corresponding preheating system is in a power-off state.
The cold start preheating switch 23 is connected with the main controller 21 and is used for turning on/off the cold start function of the engine by one key.
As shown in FIG. 3, the invention also provides a method for controlling the preheating of the cold start of the engine:
s100, determining respective working time of a fuel preheating system, a cooling preheating system and a battery preheating system of the engine according to the environment temperature and the starting condition of the engine, and respectively controlling the fuel, the cooling water and a storage battery of the engine to carry out primary preheating according to the working time of each preheating system;
s200, starting the engine, judging whether to carry out secondary preheating according to the fuel temperature, the cooling water temperature and the storage battery temperature which are collected in real time in the running process of the engine, and carrying out secondary preheating by controlling a corresponding preheating system until the fuel temperature, the cooling water temperature and the storage battery temperature meet the normal running requirements of the engine.
Specifically, the engine cold start warm-up control method includes:
step S1, before the engine is not started, ambient temperature T1 is acquired, and,
when the ambient temperature T1 is less than or equal to the cold start ambient temperature T0, executing step S2;
when the ambient temperature T1> the cold-start ambient temperature T0, step S4 is performed;
when the ambient temperature is higher than the cold starting ambient temperature T0 (generally-15 ℃), the engine can be started basically normally; when the ambient temperature is lower than-15 ℃ but not lower than-40 ℃, the cold start of the engine can be assisted by the preheating system;
s2, obtaining the initial water temperature T2 of cooling water in an engine, and determining the working time T1 of the cooling preheating system and the battery preheating system and the working time T2 of the fuel preheating system according to the corresponding relation between the pre-stored initial water temperature of the cooling water and the cold start preheating time;
for example: when the temperature is more than or equal to-40 ℃ and less than or equal to T2< -35 ℃, T1 is 25min, and T2 is 10 min;
when the temperature is more than or equal to-35 ℃ and less than or equal to T2< -25 ℃, T1 is 21min, and T2 is 9 min;
when the temperature is more than or equal to-25 ℃ and less than or equal to T2< -20 ℃, T1 is 18min, and T2 is 6 min;
when the temperature is more than or equal to-20 ℃ and less than or equal to T2< -10 ℃, T1 is 15min, and T2 is 4 min;
step S3, electrifying the cooling preheating system, the battery preheating system and the fuel preheating system, and respectively carrying out primary preheating on cooling water, a storage battery and fuel of the engine according to the working time of each preheating system determined in the step S2;
generally, t1> t2, the cooling preheating system and the battery preheating system are electrified (t1-t2) for a time, and then the fuel preheating system is electrified for a time t2 until the preheating is finished at the same time;
in step S4, the engine is started, and,
if the engine is operating normally, go to step S5;
if the starting is not successful, returning to the step S2;
and step S5, collecting the temperature of cooling water, the temperature of a storage battery and the temperature of fuel oil in the running process of the engine in real time, judging whether to perform secondary preheating according to a preset temperature threshold value, and controlling a preheating system to be subjected to secondary preheating to continue electrifying work.
Specifically, the cooling water temperature is a cooling water temperature in the engine, and the fuel temperature is a fuel temperature in the fuel inlet pipe.
Further, the determining, according to a preset temperature threshold, whether to perform secondary preheating, and controlling the preheating system to be subjected to secondary preheating to continue to perform power-on operation specifically includes:
step S51, comparing the fuel temperature with a preset fuel temperature threshold value,
when the fuel temperature is not less than the fuel temperature threshold value, controlling the fuel preheating system to be powered off, and simultaneously adjusting the working state of the fuel preheating system to be a preheating ending state;
when the fuel temperature is lower than the fuel temperature threshold, controlling the fuel preheating system to continue electrifying and work, and simultaneously adjusting the working state of the fuel preheating system to be a preheating state until the fuel temperature reaches the fuel temperature threshold;
specifically, according to the GB19147-2016 automotive diesel oil standard, automotive diesel oil is divided into six grades according to condensation points: no. 5, No. 0, -No. 10, -No. 20, -No. 35 and-No. 50, the applicable environment temperature of the diesel is generally higher than the condensation point of the diesel by 4-6 ℃, for example, the No. 20 vehicle diesel is applicable to the areas with the lowest temperature of more than-14 ℃ and the risk rate of 10 percent. Therefore, the fuel temperature threshold value in the invention is equal to the condensation point of diesel oil with the used grade + (4-6 ℃);
step S52, comparing the temperature of the storage battery with a preset storage battery temperature threshold, wherein the storage battery temperature threshold is not less than 0 ℃ for example;
when the temperature of the storage battery is not less than the temperature threshold of the storage battery, controlling the battery preheating system to be powered off, and simultaneously adjusting the working state of the battery preheating system to be a preheating ending state;
and when the temperature of the storage battery is lower than the temperature threshold of the storage battery, controlling the battery preheating system to continue electrifying and work, and simultaneously adjusting the working state of the battery preheating system to be a preheating state until the temperature of the storage battery reaches the temperature threshold of the storage battery.
In order to guarantee the vehicle warm braw effect, still include:
step S53, comparing the temperature of cooling water in the engine with a preset temperature threshold of the cooling water, wherein the temperature threshold of the cooling water is 80-85 ℃;
when the temperature of cooling water in the engine is not less than the temperature threshold of the cooling water, controlling the cooling and preheating system to be powered off, and adjusting the working state of the cooling and preheating system to be a preheating ending state;
and when the temperature of the cooling water in the engine is smaller than the temperature threshold of the cooling water, controlling the cooling and preheating system to continue electrifying work, and simultaneously adjusting the working state of the cooling and preheating system to be a preheating state until the temperature of the cooling water in the engine reaches the temperature threshold of the cooling water.
Compared with the prior art, the technical scheme has the following advantages:
(1) the electric controller automatically controls the working time of the fuel preheating system, the cooling preheating system and the battery preheating system to respectively preheat the fuel, the cooling water and the storage battery of the engine, and the preheating operation has high automation degree, is convenient and quick and is convenient to control;
(2) in the running process of the engine, the working state of each preheating system can be adjusted through the temperature of fuel oil, the temperature of cooling water and the temperature of a storage battery, so that the engine is ensured to work under a more proper temperature condition, and the reliability of the engine is improved;
(3) when the system is used for assisting the cold start of the engine, the selection range of the diesel grade of the engine is wider, so that the use cost of a user is reduced.
With reference to fig. 1 and 4, the working flow of the engine cold start preheating and control system is described in the present invention by a specific embodiment:
step 1, rotating and electrifying by using a vehicle key;
when T1 is less than or equal to T0 and the engine is not started, executing a step 4;
when T1> T0 and the engine is not started, executing step 6;
executing the step 8 when the engine is started and in a running state;
t1 and T2 are generally obtained by a plurality of experiments, and exemplarily, when the temperature is-40 ℃ and less than or equal to T2< -35 ℃, T1 is 25min, and T2 is 10 min;
when the liquid heater (piece 13) and the gas heater (piece 17) are electrified and work (t1-t2), the fuel sensor (piece 3), the first oil pipe heater (piece 5), the fuel filter (piece 8) and the second oil pipe heater (piece 9) are electrified simultaneously, and the indicator light of the fuel preheating system is displayed in yellow;
illustratively, when the temperature T2 is more than or equal to-40 ℃ and less than or equal to-35 ℃, a liquid heater (part 13) and a gas heater (part 17) are electrified, a cooling preheating system and a battery preheating system start to work, indicator lamps of the cooling preheating system and the battery preheating system are changed into yellow, a fuel sensor (part 3), a first oil pipe heater (part 5), a fuel filter (part 8) and a second oil pipe heater (part 9) are electrified after 15min, the fuel preheating system starts to work, the indicator lamps of the fuel preheating system are changed into yellow, after 25min (the cooling preheating system, the battery preheating system and the fuel preheating system work for 10min at the same time), and three indicator lamps are changed into green;
if the engine runs normally, executing the step 8;
if the engine is not started successfully, closing a cold start preheating switch (element 23), and returning to execute the step 2;
and 8, collecting temperature sensing signals of a battery preheating system, a fuel preheating system and a cooling preheating system by a main controller (part 21), and judging whether secondary preheating is performed or not, wherein the method comprises the following steps:
(1) collecting the gas temperature A17 through a gas return end sensor of a gas heater (17), taking the gas temperature A17 as the temperature of the storage battery, and comparing the gas temperature A17 with a preset storage battery temperature threshold T17 (generally 0 ℃);
when A17 is not less than T17, the gas heater (element 17) is powered off, and the indicator light of the battery preheating system is green;
when A17< T17, the main controller (part 21) controls the gas heater (part 17) to continue to be electrified and work, meanwhile, the indicator light of the battery preheating system turns yellow, and the gas heater (part 17) continues to be electrified until the indicator light of the battery preheating system turns green;
(2) reading a sensor temperature value A5 of the first oil pipe heater (piece 5) and comparing the sensor temperature value A5 with a preset fuel temperature threshold value T7 (generally higher than the condensation point of diesel oil of the used grade by 4-6 ℃);
when A5 is more than or equal to T7, the first oil pipe heater (piece 5) is powered off;
when A5< T7, the main controller (element 21) controls the first oil pipe heater (element 5) to continue to work by electrifying, and the indicator light of the fuel preheating system turns yellow;
(3) reading a sensing temperature value A7 of an oil temperature sensor (element 7) and comparing the sensing temperature value A7 with a preset fuel temperature threshold value T7;
when A7 is more than or equal to T7, the fuel sensor (piece 3) is powered off;
when A7< T7, the main controller (piece 21) controls the fuel sensor (piece 3) to continue to work by electrifying, and simultaneously an indicator lamp of the fuel preheating system turns yellow;
(4) reading a sensor temperature value A8 of the fuel filter (element 8) and comparing the sensor temperature value A8 with a preset fuel temperature threshold value T7;
when A7 is more than or equal to T7, the fuel filter (element 8) is powered off;
when A7< T7, the main controller (element 21) controls the fuel filter (element 8) to continue to work by electrifying, and the indicator light of the fuel preheating system turns yellow;
(5) reading the sensor temperature value a9 of the second tube heater (element 9) and comparing it with a preset fuel temperature threshold T7;
when A9 is more than or equal to T7, the second oil pipe heater (element 9) is powered off;
when A9< T7, the main controller (element 21) controls the second oil pipe heater (element 9) to continue to work by electrifying, and the indicator light of the fuel preheating system turns yellow;
(6) reading the cooling water temperature T2 of the engine, and comparing the temperature with a preset cooling water temperature threshold T13 (generally 80-85 ℃ for ensuring the warm air effect);
when T2 is more than or equal to T13, the liquid heater (element 13) is powered off, and the indicator light of the cooling and preheating system is green;
when T2< T13, the main controller (element 21) controls the liquid heater (element 13) to continue to be powered on, the indicator light of the cooling and preheating system turns yellow, and the liquid heater (element 13) continues to be powered on until the indicator light of the cooling and preheating system turns green.
It should be noted that, in (2) - (5), the first oil pipe heater (piece 5), the oil temperature sensor (piece 7), the fuel filter (piece 8) and the second oil pipe heater (piece 9) share the fuel preheating system indicator light, and as long as one of the four elements is powered on, the fuel preheating system indicator light is yellow, and is green when the power is off.
It should also be noted that 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 the process, method, article, or apparatus that comprises the element.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A cold start preheating control system of an engine is characterized by comprising an engine preheating system, a battery preheating system and an electric control system;
the engine preheating system comprises a fuel preheating system for preheating fuel entering the engine and a cooling preheating system for preheating cooling water in the engine;
the electric control system is respectively electrically connected with the fuel preheating system, the cooling preheating system and the battery preheating system, and is used for determining the respective working time of the fuel preheating system, the cooling preheating system and the battery preheating system according to the environmental temperature and the starting condition of the engine, respectively carrying out primary preheating on the fuel, the cooling water and the storage battery of the engine according to the working time of each preheating system before the engine is started, judging whether secondary preheating is carried out according to the fuel temperature, the cooling water temperature and the storage battery temperature in the running process of the engine, and carrying out secondary preheating work by controlling the corresponding preheating system until the fuel temperature, the cooling water temperature and the storage battery temperature meet the normal running requirements of the engine.
2. The engine cold start preheating control system according to claim 1, wherein the fuel preheating system comprises a fuel sensor with a heating function and sequentially communicated with a fuel oil through an oil pipe, a first oil pipe heater, a fuel oil filter and a second oil pipe heater;
the fuel sensor is arranged at an oil outlet of the oil tank, a PTC heating body is arranged in the fuel sensor, and the fuel sensor is used for heating fuel sucked out of the oil tank when being electrified;
the oil pipe heater comprises an electric heating wire and a temperature control element, wherein the first oil pipe heater is communicated with the fuel filter through a first preheating oil pipe, the electric heating wire of the first oil pipe heater is inserted into the first preheating oil pipe, the electric heating wire is used for heating fuel in the first preheating oil pipe when the first oil pipe heater is electrified, and the temperature control element is used for collecting the temperature of the fuel in the first preheating oil pipe in real time;
the fuel filter is internally provided with a PTC heating element and a temperature sensor, and is used for heating fuel oil flowing through the fuel filter when being electrified and collecting the temperature of the fuel oil in the fuel filter;
the second oil pipe heater is communicated with the engine through a second preheating oil pipe, an electric heating wire of the second oil pipe heater is inserted into the second preheating oil pipe, the electric heating wire is used for heating fuel oil in the second preheating oil pipe when the second oil pipe heater is powered on, and a temperature control element of the second oil pipe heater is used for collecting the temperature of the fuel oil in the second preheating oil pipe in real time.
3. The engine cold start preheating control system according to claim 2, wherein an oil temperature sensor is further arranged at an oil inlet end of the fuel filter, the oil temperature sensor and the first preheating oil pipe are mounted on the same side face of the fuel filter in parallel, and the oil temperature sensor is used for collecting the temperature of flowing fuel oil after the engine is started.
4. The engine cold start warm-up control system according to claim 3, wherein the cooling warm-up system is for heating a cooling water circulation in the engine, and includes:
the liquid heater is communicated with an oil outlet of the oil tank through an oil pipe with an electric preheating function, the liquid heater sucks fuel oil by using a fuel pump and burns the fuel oil to heat internal cooling liquid when being electrified, and the flow direction of the cooling liquid is controlled by a water pump;
one end of the water outlet pipe is connected with a water outlet of the liquid heater, and the other end of the water outlet pipe is connected with a water inlet of the engine and used for leading cooling liquid heated by the liquid heater into the engine to exchange heat with cooling water in the engine;
and one end of the water return pipe is connected with a water outlet of the engine, and the other end of the water return pipe is connected with a water return port of the liquid heater and used for returning the cooling liquid subjected to heat exchange to the liquid heater for recycling.
5. The engine cold start warm-up control system of claim 4, wherein the battery warm-up system is configured to cycle heat the battery module, comprising:
the gas heater is communicated with an oil outlet of the oil tank through an oil pipe with an electric preheating function, fuel oil is sucked by the fuel oil pump and is combusted to heat gas inside the gas heater when the gas heater is powered on, and the flow direction of the gas is controlled through the pneumatic pump;
one end of the gas outlet pipe is connected with the gas outlet of the gas heater, and the other end of the gas outlet pipe is connected with the gas inlet of the storage battery module and used for leading the gas heated by the gas heater into the storage battery module and exchanging heat with the storage battery module;
and one end of the air return pipe is connected with the air outlet of the storage battery module, and the other end of the air return pipe is connected with the air return port of the gas heater and used for returning the gas subjected to heat exchange to the gas heater for recycling.
6. The engine cold start warm-up control system of claim 5, wherein the electrical control system comprises:
the main controller is connected with an engine Electronic Control Unit (ECU) through a Controller Area Network (CAN) bus and used for collecting the ambient temperature and the engine temperature, the main controller is also electrically connected with the fuel oil sensor, the first oil pipe heater, the fuel oil filter, the second oil pipe heater, the oil temperature sensor, the liquid heater and the gas heater respectively, under the power supply action of the storage battery module, the main controller collects temperature sensing signals from the elements in real time and controls the power-on and power-off of the elements according to the ambient temperature, the engine temperature and prestored engine starting/running related information;
the display, with main control unit connects for show the fuel preheats the system, the cooling preheats the system and the operating condition of battery preheating system includes: taking the power-on states of the fuel sensor, the first oil pipe heater, the fuel filter and the second oil pipe heater as input, and outputting a working state signal of the fuel preheating system; outputting a working state signal of the cooling and preheating system according to the power-on state of the liquid heater; outputting a working state signal of the battery preheating system according to the power-on state of the gas heater; and the number of the first and second groups,
and the cold start preheating switch is connected with the main controller and is used for starting/stopping the cold start function of the engine by one key.
7. The engine cold start preheating control system according to claim 6, wherein the main controller collects temperature sensing signals from the above elements in real time, and controls the power on and off of the above elements according to the ambient temperature, the engine temperature and pre-stored engine start/operation related information, specifically comprising:
in the primary preheating stage, according to the corresponding relation between the environment temperature, the engine temperature and the pre-stored engine temperature and the cold start preheating time, the working time of each of the cooling preheating system, the battery preheating system and the fuel oil preheating system is determined, the liquid heater is electrified according to the working time of the cooling preheating system, the gas heater is electrified according to the working time of the battery preheating system, and the fuel oil sensor, the first oil pipe heater, the fuel oil filter and the second oil pipe heater are simultaneously electrified according to the working time of the fuel oil preheating system, so that the primary preheating of the fuel oil, the cooling water and the storage battery of the engine is realized;
and in the secondary preheating stage, the temperature of cooling water, the temperature of fuel oil and the temperature of a storage battery in the running process of the engine are collected, whether the cooling preheating system continues to be electrified to work or not is judged according to a preset cooling water temperature threshold value, whether the fuel oil preheating system continues to be electrified to work or not is judged according to a preset storage battery temperature threshold value, and the secondary preheating work is carried out by controlling the corresponding preheating system, so that the temperature of the cooling water, the temperature of the fuel oil and the temperature of the storage battery are not less than respective threshold values.
8. An engine cold start warm-up control method applied to the system of any one of claims 1 to 7, characterized by comprising:
determining the respective working time of a fuel preheating system, a cooling preheating system and a battery preheating system of the engine according to the environment temperature and the starting condition of the engine, and respectively carrying out primary preheating on the fuel, the cooling water and the storage battery of the engine according to the working time of each preheating system;
starting the engine, judging whether to carry out secondary preheating according to the fuel temperature, the cooling water temperature and the storage battery temperature which are collected in real time in the running process of the engine, and carrying out secondary preheating work by controlling a corresponding preheating system until the fuel temperature, the cooling water temperature and the storage battery temperature meet the normal running requirements of the engine.
9. The engine cold start warm-up control method according to claim 8, characterized in that the engine cold start warm-up control method specifically includes:
step S1, before the engine is not started, ambient temperature T1 is acquired, and,
when the ambient temperature T1 is less than or equal to the cold start ambient temperature T0, executing step S2;
when the ambient temperature T1> the cold-start ambient temperature T0, step S4 is performed;
s2, obtaining the initial water temperature T2 of cooling water in an engine, and determining the working time T1 of the cooling preheating system and the battery preheating system and the working time T2 of the fuel preheating system according to the corresponding relation between the pre-stored initial water temperature of the cooling water and the cold start preheating time;
step S3, the cooling preheating system, the battery preheating system and the fuel preheating system are electrified, primary preheating is respectively carried out on cooling water, a storage battery and fuel of the engine according to the working time of each preheating system determined in the step S2, and each preheating system is powered off after the primary preheating is finished;
in step S4, the engine is started, and,
if the engine is operating normally, go to step S5;
if the starting is not successful, returning to execute the step S2;
and step S5, collecting the temperature of cooling water, the temperature of fuel oil and the temperature of a storage battery in the running process of the engine in real time, judging whether to carry out secondary preheating according to preset temperature thresholds, and controlling a preheating system to be subjected to secondary preheating to continue electrifying work.
10. The engine cold start preheating control method according to claim 8, wherein the determining whether to perform the secondary preheating according to the preset temperature thresholds and controlling the preheating system to be subjected to the secondary preheating to continue to be powered on specifically comprises:
step S51, comparing the fuel temperature with a preset fuel temperature threshold value,
when the fuel temperature is not less than the fuel temperature threshold value, controlling the fuel preheating system to be powered off, and simultaneously adjusting the working state of the fuel preheating system to be a preheating ending state;
when the fuel temperature is lower than the fuel temperature threshold, controlling the fuel preheating system to continue electrifying and work, and simultaneously adjusting the working state of the fuel preheating system to be a preheating state until the fuel temperature reaches the fuel temperature threshold;
step S52, comparing the temperature of the storage battery with a preset storage battery temperature threshold value,
when the temperature of the storage battery is not less than the temperature threshold of the storage battery, controlling the battery preheating system to be powered off, and simultaneously adjusting the working state of the battery preheating system to be a preheating ending state;
when the temperature of the storage battery is lower than the temperature threshold of the storage battery, controlling the battery preheating system to continue electrifying and work, and simultaneously adjusting the working state of the battery preheating system to be a preheating state until the temperature of the storage battery reaches the temperature threshold of the storage battery;
step S53, comparing the temperature of the cooling water in the engine with a preset cooling water temperature threshold value,
when the temperature of cooling water in the engine is not less than the temperature threshold of the cooling water, controlling the cooling and preheating system to be powered off, and adjusting the working state of the cooling and preheating system to be a preheating ending state;
and when the temperature of the cooling water in the engine is smaller than the temperature threshold of the cooling water, controlling the cooling and preheating system to continue electrifying work, and simultaneously adjusting the working state of the cooling and preheating system to be a preheating state until the temperature of the cooling water in the engine reaches the temperature threshold of the cooling water.
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| CN113431722A (en) * | 2021-07-21 | 2021-09-24 | 合肥康尔信电力系统有限公司 | Low-temperature starting preheating system of diesel generator |
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| CN115163354B (en) * | 2022-07-20 | 2024-04-02 | 徐州徐工挖掘机械有限公司 | Engine intake preheating sectional control method and engineering machinery |
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Application publication date: 20210122 Assignee: Hunan ZOOMLION Crawler Crane Co.,Ltd. Assignor: ZOOMLION HEAVY INDUSTRY SCIENCE AND TECHNOLOGY Co.,Ltd. Contract record no.: X2023980044887 Denomination of invention: Engine cold start preheating control system and method Granted publication date: 20220412 License type: Common License Record date: 20231030 Application publication date: 20210122 Assignee: Hunan Zoomlion engineering hoisting equipment Co.,Ltd. Assignor: ZOOMLION HEAVY INDUSTRY SCIENCE AND TECHNOLOGY Co.,Ltd. Contract record no.: X2023980044882 Denomination of invention: Engine cold start preheating control system and method Granted publication date: 20220412 License type: Common License Record date: 20231030 Application publication date: 20210122 Assignee: Zoomlion Heavy Industry Science and Technology Co.,Ltd. Assignor: ZOOMLION HEAVY INDUSTRY SCIENCE AND TECHNOLOGY Co.,Ltd. Contract record no.: X2023980044881 Denomination of invention: Engine cold start preheating control system and method Granted publication date: 20220412 License type: Common License Record date: 20231030 |