CN116877221A - Engine pre-oil supply system and method - Google Patents

Engine pre-oil supply system and method Download PDF

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Publication number
CN116877221A
CN116877221A CN202310664658.1A CN202310664658A CN116877221A CN 116877221 A CN116877221 A CN 116877221A CN 202310664658 A CN202310664658 A CN 202310664658A CN 116877221 A CN116877221 A CN 116877221A
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CN
China
Prior art keywords
oil
engine
pump
main
tank
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
CN202310664658.1A
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Chinese (zh)
Inventor
任利东
刘井年
董方龙
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 CN202310664658.1A priority Critical patent/CN116877221A/en
Publication of CN116877221A publication Critical patent/CN116877221A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/02—Pressure lubrication using lubricating pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/12—Closed-circuit lubricating systems not provided for in groups F01M1/02 - F01M1/10
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/16—Controlling lubricant pressure or quantity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/18—Indicating or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/18—Indicating or safety devices
    • F01M1/20—Indicating or safety devices concerning lubricant pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/001—Heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/005—Controlling temperature of lubricant
    • F01M5/007—Thermostatic control

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

The invention relates to an engine pre-oil supply system and method, comprising a main oil tank and an auxiliary oil tank, wherein the main oil tank is sequentially connected with an oil pump and a main oil duct through pipelines; the auxiliary oil tank is connected with the outlets of the main oil duct and the engine oil pump through corresponding pipelines respectively, a first pre-oil supply pump is arranged on the pipeline connected with the outlet of the engine oil pump, a second pre-oil supply pump is arranged on the pipeline connected with the main oil duct, and a heating device is arranged on the auxiliary oil tank. Through increasing bellytank and supporting pipeline and oil pump, utilize the oil duct pressure wave when engine start for the first time or normal operating to pour into lubricating oil into the bellytank into for when engine oil viscosity risees under low temperature environment, can utilize in the main oil duct is sent into after heating device heats the lubricating oil in the bellytank, avoid the bearing bush region to receive the dry grinding that the influence of oil viscosity arouses, lubrication and damage the problem.

Description

Engine pre-oil supply system and method
Technical Field
The invention relates to the technical field of engines, in particular to an engine pre-oil supply system and method.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The engine needs a matched lubricating system to send engine oil to all required positions so as to ensure normal operation. As shown in fig. 1, a conventional lubrication system is to pre-supply oil to a set pressure or to restart the engine after a set time has elapsed during engine start.
In cold areas, engine oil is affected by low temperature, so that viscosity is increased, and the operation effect of an oil supply pump is affected when an engine is started, so that a main oil duct, particularly a bearing bush area far away from the tail end of an oil inlet of the main oil duct, is difficult to be covered by engine oil, at the moment, if the engine oil pressure reaches a set value or the oil supply pump runs for a set period of time, the engine can execute a starting action, and the bearing bush at the moment is still in a state of lacking lubrication, so that the bearing bush is damaged by dry grinding.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides an engine pre-oil supply system and an engine pre-oil supply method, which are characterized in that devices such as an auxiliary oil tank, matched pipelines, valves, sensors and the like are added in the existing lubrication system to form four oil supply branches which play different roles, so that the problem of unsmooth lubrication caused by the increase of the viscosity of engine oil is solved.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a first aspect of the present invention provides an engine pre-oil supply system comprising:
the main oil tank is sequentially connected with the oil pump and the main oil duct through pipelines;
the auxiliary oil tank is connected with outlets of the main oil duct and the engine oil pump through corresponding pipelines respectively, a first pre-oil supply pump is arranged on a pipeline connected with the outlet of the engine oil pump, a second pre-oil supply pump is arranged on a pipeline connected with the main oil duct, and a heating device is arranged on the auxiliary oil tank.
The inlet of the engine oil pump is connected with the main oil tank, the outlet of the engine oil pump is sequentially connected with the thermostat, the first engine oil filter and the main oil tank through pipelines, and the first engine oil filter is provided with a bypass valve which is arranged in parallel with the first engine oil filter.
The inlet of the first pre-fuel feed pump is connected with the main fuel tank, the outlet is connected with a first interface of the first electromagnetic valve, a second interface of the first electromagnetic valve is connected with the second engine oil filter and the auxiliary fuel tank through pipelines, and a third interface of the first electromagnetic valve is connected with the outlet of the engine oil pump.
The first interface of the first electromagnetic valve is communicated with the second interface, or the first interface is communicated with the third interface.
The inlet of the second pre-fuel feed pump is connected with the auxiliary fuel tank, the outlet of the second pre-fuel feed pump is connected with the main fuel duct through a pipeline, and a one-way valve is arranged on the pipeline.
The auxiliary oil tank is connected with the main oil duct through a pipeline, and a second electromagnetic valve is arranged on the pipeline.
The main oil duct is provided with a pressure sensor and a pressure limiting valve, the auxiliary oil tank is provided with a liquid level sensor, and the opening sequence of the second electromagnetic valve and the pressure limiting valve is determined according to the pressure of the main oil duct and the liquid level of the auxiliary oil tank.
A second aspect of the present invention provides a system for implementing a method for engine pre-fueling, comprising the steps of:
determining that a first interface of a first electromagnetic valve is communicated with a third interface according to the result of whether the engine is started for the first time or not;
when the temperature of the main oil tank is not greater than a set value T1, starting a heating device of the auxiliary oil tank, after the temperature is greater than T1, starting a second pre-oil supply pump to pump the heated lubricating oil in the auxiliary oil tank into a main oil duct, and when the temperature at the tail end of the oil duct is greater than 90% multiplied by T1, starting an engine;
when the temperature of the main oil tank is higher than a set value T1, the first pre-oil supply pump starts to pump the lubricating oil in the main oil tank into the main oil duct, and when the pressure of the main oil duct is higher than a set value a, the engine starts; if the main oil duct pressure is not greater than the set value a, judging whether an engine starting condition is met according to the working time of the first pre-oil supply pump;
when the engine is started, the oil pump works, and the first pre-feed oil pump stops.
When the pressure of the main oil duct is larger than the set value b during the operation of the engine, if the liquid level in the auxiliary oil tank does not exceed the set position, the second electromagnetic valve is opened, lubricating oil in the main oil duct is leaked into the auxiliary oil tank, and the second electromagnetic valve is closed; if the liquid level in the auxiliary oil tank exceeds the set position, the second electromagnetic valve maintains the closed state, and the lubricating oil leaks into the main oil tank or the set area.
Judging whether the engine is started for the first time, specifically:
if so, the first interface of the first electromagnetic valve is communicated with the second interface, the first pre-supply oil pump pumps the lubricating oil in the main oil tank into the auxiliary oil tank, after the lubricating oil reaches the set liquid level, the first pre-supply oil pump stops, and the first electromagnetic valve acts to enable the first interface to be communicated with the third interface;
if not, the first pre-fuel supply pump is stopped, and the first interface of the first electromagnetic valve is communicated with the third interface.
Compared with the prior art, the above technical scheme has the following beneficial effects:
1. through increasing bellytank and supporting pipeline and oil pump, utilize the oil duct pressure wave when engine start for the first time or normal operating to pour into lubricating oil into the bellytank into for when engine oil viscosity risees under low temperature environment, can utilize in the main oil duct is sent into after heating device heats the lubricating oil in the bellytank, avoid the bearing bush region to receive the dry grinding that the influence of oil viscosity arouses, lubrication and damage the problem.
2. When the engine works, the auxiliary oil tank can absorb lubricating oil discharged by the pressure of the main oil duct in an ultrahigh mode, so that the opening times of the pressure limiting valve of the main oil duct are reduced, and the influence on the pressure of the main oil duct is reduced.
3. When the first pre-oil supply pump is used for starting the engine for the first time, the first pre-oil supply pump is used as a component for supplementing lubricating oil to the auxiliary oil tank, and is also used as a power component for pre-supplying the lubricating oil at normal temperature of the engine, and after the engine is normally operated, a spare component of the oil pump is formed, so that multiple functions are exerted.
4. The original engine lubricating oil way is not changed, but the original pre-oil way is decomposed into a plurality of branches which respectively play different roles in a way of adding components, so that fault points of the engine can be rapidly positioned in the overhaul process, and the working efficiency of the engine during overhaul is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding 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 invention.
FIG. 1 is a schematic diagram of a lubrication system according to the prior art;
FIG. 2 is a schematic diagram of an engine pre-oil supply system provided by one or more embodiments of the present disclosure;
FIG. 3 is a schematic diagram of a main gallery pressure limiting valve opening characteristic provided by one or more embodiments of the present disclosure;
FIG. 4 is a flow diagram of an engine pre-oil supply system in operation, as provided by one or more embodiments of the present invention.
Detailed Description
The invention will be further described with reference to the drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
As described in the background art, under the influence of low temperature in cold areas, the viscosity of engine oil is high, and the performance of the oil supply pump is affected, so that engine oil cannot be supplied to all lubrication points, at this time, if the engine oil pressure reaches a set value or the oil supply pump is operated for a set period of time, the engine is executing a starting action, and the bearing bush may still be in a state of lack of lubrication, so that the bearing bush is damaged by dry grinding.
The following embodiment provides an engine pre-oil supply system and method, which adds auxiliary oil tanks, matched pipelines, valves, sensors and other devices in the existing lubrication system to form four oil supply branches which are matched with each other, so as to solve the problem of unsmooth lubrication caused by the increase of the viscosity of engine oil.
Embodiment one:
in this embodiment, as shown in fig. 2, the oil filter 1 in fig. 2 corresponds to the first oil filter in the foregoing, the oil filter 2 in fig. 2 corresponds to the second oil filter in the foregoing, the solenoid valve 1 in fig. 2 corresponds to the first solenoid valve in the foregoing, the solenoid valve 2 in fig. 2 corresponds to the second solenoid valve in the foregoing, the pre-feed pump 1 corresponds to the first pre-feed pump in the foregoing, the pre-feed pump 2 in fig. 2 corresponds to the second pre-feed pump in the foregoing, the branch 1 in fig. 2 corresponds to the branch (1) in the foregoing, the branch 2 in fig. 2 corresponds to the branch (2) in the foregoing, the branch 3 in fig. 2 corresponds to the branch (3) in the foregoing, and the branch 4 in fig. 2 corresponds to the branch (4) in the foregoing.
As shown in fig. 2, an engine pre-oil supply system comprises a main oil tank and an auxiliary oil tank, wherein a heating device and a liquid level sensor are arranged on the auxiliary oil tank; the main oil tank in the embodiment is positioned at the oil pan;
the main oil tank is sequentially connected with the oil pump and the main oil duct through pipelines to form a branch (2); the branch (2) is provided with a thermostat, an oil cooler and an oil filter 1, the outlet of the oil pump is sequentially connected with the thermostat and the oil filter 1 through pipelines and is connected to a main oil tank, and the oil filter 1 is provided with a bypass valve which is connected with the thermostat and the oil filter 1 in parallel;
the auxiliary oil tank is sequentially connected with the pre-supply oil pump 1 and the outlet of the engine oil pump through pipelines to form a branch (1); the branch circuit (1) is provided with an electromagnetic valve 1 and an oil filter 2, an inlet of the pre-feed oil pump 1 is connected with a main oil tank, and an outlet of the pre-feed oil pump 1 is sequentially connected with the electromagnetic valve 1 and the oil filter 2 through pipelines and is connected to an auxiliary oil tank; the electromagnetic valve 1 is a two-position three-way electromagnetic valve, the first interface is connected with the outlet of the pre-fuel pump 1 through a pipeline, the second interface is connected with the engine oil filter 2 through a pipeline, and the third interface is connected with the outlet of the engine oil pump through a pipeline;
the auxiliary oil tank is sequentially connected with the pre-oil supply pump 2 and the main oil duct through pipelines to form a branch (3); a one-way valve is arranged on a pipeline between the outlet of the pre-feed oil pump 2 and the main oil duct;
the auxiliary oil tank is connected with the main oil duct through a pipeline to form a branch (4); and a solenoid valve 2 is arranged on a pipeline between the auxiliary oil tank and the main oil duct.
Branch (1): when the engine is started for the first time, the electromagnetic valve 1 is switched into the state position 1, so that the pre-supply oil pump 1 can pump lubricating oil in the main oil tank into the auxiliary oil tank, and the branch is provided with the oil filter 2 so as to ensure the cleanliness of oil in the auxiliary oil tank; when the engine is started for the first time, the pre-supply oil pump 1 is used as a backup oil pump of the oil pump, when the oil pump cannot work or needs to be stopped for inspection, the electromagnetic valve 2 is cut into the state position 2, and lubricating oil in the main oil tank is sent into a thermostat of the branch circuit (2) through the pre-supply oil pump 1, so that the same function as the oil pump is achieved.
Branch (2): the pre-oil supply way is consistent with the current lubrication system when the engine is started at normal temperature; during operation, lubricating oil in the main oil tank is sequentially sent into the main oil duct through the thermostat and the oil filter 1 by the oil pump to participate in lubrication circulation.
Branch (3): when the engine is started at low temperature, the heating device (the heating rod in fig. 2) is started to heat the lubricating oil in the auxiliary oil tank to a set temperature, and the pre-oil supply pump 2 pumps the lubricating oil heated by the auxiliary oil tank into the main oil duct through the one-way valve to perform lubrication circulation, so that the lubricating oil is always present in the bearing bush area when the engine is started at low temperature, and dry grinding is avoided.
Branch (4): and an auxiliary oil tank oil supplementing branch which is communicated with the main oil duct and is controlled by the electromagnetic valve 2. According to the opening characteristic of the main oil duct pressure limiting valve shown in fig. 3, the access time of the branch (4) is prioritized over the opening time of the pressure limiting valve, so that when the engine works normally, the oil pressure discharged when the pressure of the main oil duct fluctuates enters the auxiliary oil tank first, and when the liquid level of the auxiliary oil tank exceeds the set value, the auxiliary oil tank returns to the main oil tank, so that the influence on the pressure of the main oil duct is reduced.
By adding auxiliary oil tanks, matched pipelines, valves, sensors and other devices in the existing engine lubricating system, four oil supply branches matched with each other are formed, so that the problems of unsmooth lubrication caused by the increase of the viscosity of engine oil in a low-temperature environment and the problems of ultrahigh pressure of a main oil duct are solved.
Embodiment two:
as shown in fig. 4, the system based on the first embodiment implements an engine pre-fueling method, including the steps of:
judging whether the engine is started for the first time, if so, the branch (1) works, the electromagnetic valve 1 cuts into the state position 1, so that the pre-fuel pump 1 can pump the lubricating oil in the main fuel tank into the auxiliary fuel tank, and when the liquid level of the auxiliary fuel tank reaches a set value, the pre-fuel pump 1 stops, and the electromagnetic valve 1 is closed or cuts into the state position 2; if the engine is not started for the first time, the branch (1) does not work, the pre-fuel pump 1 is stopped, and the electromagnetic valve 1 is closed or cut into the state position 2;
acquiring the temperature of a main oil tank (or the temperature of an oil pan), when the temperature is not greater than a set value T1, starting a heating device of an auxiliary oil tank, after the temperature is greater than the set value T1, operating a branch (3), starting a pre-oil supply pump 2 to pump the heated lubricating oil in the auxiliary oil tank into the main oil duct, and when the temperature at the tail end of the oil duct is close to the set value T1 (for example, greater than 90% multiplied by T1), starting an engine;
when the temperature of the main oil tank (or the temperature of the oil pan) is greater than a set value T1, the branch circuit (2) works, the pre-oil pump 1 starts to pump the lubricating oil in the main oil tank into the main oil channel, and when the pressure of the main oil channel is greater than a set value a, the engine starts; when the main oil duct pressure is not greater than the set value a, the pre-feed oil pump 1 continues to work for a set period of time (t 1), and then continues to judge the main oil duct pressure until the engine starting condition is met;
during the operation of the engine, when the pressure of the main oil duct is greater than a set value b, the electromagnetic valve 2 is opened to enable the branch circuit (4) to work, the liquid level in the auxiliary oil tank is judged, and when the liquid level is not higher than a high level, the lubricating oil released by the excessive pressure in the main oil duct is discharged into the auxiliary oil tank through the branch circuit (4), and then the electromagnetic valve 2 is closed; if the height is exceeded, the lubricating oil is discharged into the main oil tank or into a designated position.
By adding auxiliary oil tanks, matched pipelines, valves, sensors and other devices in the existing engine lubricating system, four oil supply branches matched with each other are formed, so that the problems of unsmooth lubrication caused by the increase of the viscosity of engine oil in a low-temperature environment and the problems of ultrahigh pressure of a main oil duct are solved.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An engine pre-fueling system comprising:
the main oil tank is sequentially connected with the oil pump and the main oil duct through pipelines;
the auxiliary oil tank is connected with outlets of the main oil duct and the engine oil pump through corresponding pipelines respectively, a first pre-oil supply pump is arranged on a pipeline connected with the outlet of the engine oil pump, a second pre-oil supply pump is arranged on a pipeline connected with the main oil duct, and a heating device is arranged on the auxiliary oil tank.
2. An engine pre-oil supply system as set forth in claim 1 wherein the inlet of the oil pump is connected to the main tank and the outlet of the oil pump is connected in series via a conduit to the thermostat, the first oil filter and the main tank, the first oil filter having a bypass valve disposed in parallel therewith.
3. The engine pre-oil supply system according to claim 1, wherein the inlet of the first pre-oil supply pump is connected with the main oil tank, the outlet is connected with the first interface of the first electromagnetic valve, the second interface of the first electromagnetic valve is connected with the second oil filter and the auxiliary oil tank through a pipeline, and the third interface of the first electromagnetic valve is connected with the outlet of the oil pump.
4. An engine pre-fueling system as set forth in claim 3 wherein the first port of the first solenoid valve communicates with the second port or the first port communicates with the third port.
5. An engine pre-oil supply system according to claim 1, wherein the inlet of the second pre-oil supply pump is connected with the auxiliary oil tank, the outlet is connected with the main oil duct through a pipeline, and a one-way valve is arranged on the pipeline.
6. An engine pre-oil supply system as set forth in claim 1 wherein said secondary oil tank is connected to the main oil gallery by a conduit having a second solenoid valve disposed thereon.
7. The engine pre-oil supply system according to claim 1, wherein the main oil duct is provided with a pressure sensor and a pressure limiting valve, the auxiliary oil tank is provided with a liquid level sensor, and the opening sequence of the second electromagnetic valve and the pressure limiting valve is determined according to the pressure of the main oil duct and the liquid level of the auxiliary oil tank.
8. A method for achieving engine fueling based on the system of any of claims 1-7 comprising the steps of:
determining that a first interface of a first electromagnetic valve is communicated with a third interface according to the result of whether the engine is started for the first time or not;
when the temperature of the main oil tank is not greater than a set value T1, starting a heating device of the auxiliary oil tank, after the temperature is greater than T1, starting a second pre-oil supply pump to pump the heated lubricating oil in the auxiliary oil tank into a main oil duct, and when the temperature at the tail end of the oil duct is greater than 90% multiplied by T1, starting an engine;
when the temperature of the main oil tank is higher than a set value T1, the first pre-oil supply pump starts to pump the lubricating oil in the main oil tank into the main oil duct, and when the pressure of the main oil duct is higher than a set value a, the engine starts; if the main oil duct pressure is not greater than the set value a, judging whether an engine starting condition is met according to the working time of the first pre-oil supply pump;
when the engine is started, the oil pump works, and the first pre-feed oil pump stops.
9. The engine pre-oil supply method according to claim 7, wherein the second solenoid valve is opened to drain the lubricating oil in the main oil gallery into the auxiliary oil tank if the liquid level in the auxiliary oil tank does not exceed the set position when the main oil gallery pressure is greater than the set value b during the engine operation, and the second solenoid valve is closed; if the liquid level in the auxiliary oil tank exceeds the set position, the second electromagnetic valve maintains the closed state, and the lubricating oil leaks into the main oil tank or the set area.
10. The engine pre-fueling method of claim 7 wherein the first port of the first solenoid valve is configured to communicate with the third port based on a result of whether the engine is first started, specifically:
if the engine is started for the first time, a first interface of the first electromagnetic valve is communicated with a second interface, the first pre-supply oil pump pumps lubricating oil in the main oil tank into the auxiliary oil tank, after the lubricating oil reaches a set liquid level, the first pre-supply oil pump stops, and the first electromagnetic valve acts to enable the first interface to be communicated with a third interface;
if the engine is not started for the first time, the first pre-fuel supply pump is stopped, and the first interface of the first electromagnetic valve is communicated with the third interface.
CN202310664658.1A 2023-06-05 2023-06-05 Engine pre-oil supply system and method Pending CN116877221A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310664658.1A CN116877221A (en) 2023-06-05 2023-06-05 Engine pre-oil supply system and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310664658.1A CN116877221A (en) 2023-06-05 2023-06-05 Engine pre-oil supply system and method

Publications (1)

Publication Number Publication Date
CN116877221A true CN116877221A (en) 2023-10-13

Family

ID=88255721

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310664658.1A Pending CN116877221A (en) 2023-06-05 2023-06-05 Engine pre-oil supply system and method

Country Status (1)

Country Link
CN (1) CN116877221A (en)

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