CN112127963A - Engine, engine starting system, starting method and lubricating oil path cleaning method - Google Patents
Engine, engine starting system, starting method and lubricating oil path cleaning method Download PDFInfo
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- CN112127963A CN112127963A CN202010876217.4A CN202010876217A CN112127963A CN 112127963 A CN112127963 A CN 112127963A CN 202010876217 A CN202010876217 A CN 202010876217A CN 112127963 A CN112127963 A CN 112127963A
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- engine
- control switch
- oil pressure
- preset
- starting
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- 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
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- 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
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- 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
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- 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
- F01M5/02—Conditioning lubricant for aiding engine starting, e.g. heating
- F01M5/025—Conditioning lubricant for aiding engine starting, e.g. heating by prelubricating, e.g. using an accumulator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/04—Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines
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- 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
- F01M5/02—Conditioning lubricant for aiding engine starting, e.g. heating
- F01M5/025—Conditioning lubricant for aiding engine starting, e.g. heating by prelubricating, e.g. using an accumulator
- F01M2005/026—Conditioning lubricant for aiding engine starting, e.g. heating by prelubricating, e.g. using an accumulator with an auxiliary pump
Abstract
The invention belongs to the technical field of engines, and provides an engine starting system, a starting method and a lubricating oil path cleaning method. In the starting method, before the engine is started, a pre-oil supply pump is used for supplying and pre-lubricating oil, after the lubricating oil in a main oil duct reaches a certain pressure, a disc-type mechanism is used for enabling the engine to rotate at a low speed, so that the lubricating oil can cover the whole bearing, particularly a bearing area, and after the set pressure is reached, the engine is restarted, so that the lubricating state of the key bearing in the starting stage is enhanced, and the starting abrasion is reduced. The flushing and starting processes are automatically controlled, and the workload of people is reduced.
Description
Technical Field
The invention belongs to the technical field of engines, and particularly relates to an engine starting system. The invention also relates to an engine, a starting method and a method for cleaning a lubricating oil path.
Background
This section provides background information related to the present disclosure only and is not necessarily prior art.
In the prior art, for a large-bore engine, especially a large-bore diesel engine, a stationary flushing is often used for flushing (flushing an engine lubricating oil path), after the engine is flushed for a period of time, the engine is manually turned, and then the stationary flushing is performed until the time required for flushing is finished. Although the washing of the lubricating oil circuit of the engine is considered, the manual coiling is required regularly, and the time and the labor are wasted.
According to the existing starting technical scheme, certain lubricating oil is provided for a friction pair before an engine is started, so that friction in a starting stage is reduced, but the engine is always in a static state, the lubricating oil flows out from a bearing gap under the action of self weight of a crankshaft, a camshaft and the like, the lubricating oil is difficult to provide to a bearing area of the friction pair, and abrasion mainly occurs in the bearing area. When the engine is started, the required rotating speed is rapidly increased to the ignition rotating speed, so that the dry friction phenomenon still exists in the bearing area at the starting stage of the engine.
Disclosure of Invention
The invention aims to at least solve the problems that the cleaning method of the engine lubricating oil path in the prior art is low in efficiency and the key friction pair of the engine is easy to generate large abrasion in the starting stage, and the aim is realized by the following technical scheme:
a first aspect of the present invention proposes an engine starting system including:
the electronic control pre-feeding oil pump is used for pumping lubricating oil into a lubricating oil path of the engine;
the first control switch is connected in series with one end of the electric control pre-feeding oil pump and is used for controlling the opening and closing of the electric control pre-feeding oil pump;
the electric barring mechanism is used for barring the engine;
the second control switch is connected in series with one end of the electric turning mechanism and used for controlling the opening and closing of the electric turning mechanism;
the engine oil pressure sensor is used for monitoring the engine oil pressure of the engine main oil gallery;
and the ECU is electrically connected with the engine oil pressure sensor, the third control switch and the second control switch.
The engine starting system provided by the invention is provided with the electric control pre-oil-supply pump, and can pump lubricating oil into a lubricating oil path of the engine for flushing before starting.
In addition, the engine starting system according to the first aspect of the present invention may further have the following additional features:
in some embodiments of the invention, the engine starting system further comprises a battery electrically connected to the electronically controlled pre-feed oil pump, the electric turning gear and the starter.
In some embodiments of the present invention, the engine starting system further includes an engine speed sensor, a starter, and a third control switch connected in series to one end of the starter, wherein the third control switch and the engine speed sensor are both electrically connected to the ECU, the engine speed sensor is configured to monitor a speed of the engine, the starter is configured to start the engine, and the third control switch is configured to control the starter to be turned on or off.
A second aspect of the present invention provides a method of cleaning a lubricating oil passage of an engine, which is implemented according to the engine starting system set forth in the first aspect of the present invention, the method including the steps of:
controlling the first control switch to be closed;
receiving an oil pressure signal of the oil pressure sensor;
judging whether to control the second control switch to be closed or not according to the engine oil pressure signal;
judging whether to control the first control switch and the second control switch to be switched off or not according to the working time of the electric turning mechanism;
the method for cleaning the lubricating oil path provided by the second aspect of the invention adopts the electric control pre-feeder oil pump to flush the lubricating oil path, when the lubricating oil in the main oil path reaches a certain pressure, the electric control barring mechanism is adopted to barring the engine so that the engine rotates at a low speed, thus being more convenient to flush each part of the whole lubricating oil path, being convenient for flushing out particulate matters in the lubricating oil path, improving the cleaning effect, automatically controlling the cleaning process and reducing the manual workload.
In some embodiments of the present invention, the method for cleaning the lubricating oil path further comprises the steps of:
judging the relation between the engine oil pressure signal and a second preset engine oil pressure value;
judging the on-off state of the second control switch according to the result that the engine oil pressure signal is greater than or equal to the second preset engine oil pressure value;
controlling the second control switch to be closed according to the result that the second control switch is in an off state, and recording the moment as a first moment;
and recording the moment as a second moment according to the result that the second control switch is in a closed state. Judging the relation between the difference between the second moment and the first moment and a preset flushing time;
and controlling the first control switch and the second control switch to be switched off according to the result that the difference between the second moment and the first moment is greater than or equal to the preset flushing duration.
A third aspect of the present invention proposes a starting method for starting an engine, implemented according to the engine starting system proposed in the first aspect of the present invention, the starting method comprising the steps of:
controlling the first control switch to be closed;
the oil pressure sensor of the receiver monitors an oil pressure signal of the main oil duct in real time;
judging whether to execute a first action or a second action according to the engine oil pressure signal, wherein the first action is to judge the on-off state of the second control switch, and the second action is to judge the relation between the working time of the electric barring gear and the preset barring time;
judging the on-off state of the second control switch according to the result of executing the first action;
controlling the second control switch to be closed according to the result that the second control switch is in an off state;
judging the relation between the working time length of the electric barring gear and the preset barring time length according to the result of executing the second action;
according to the result that the working time length is greater than or equal to the preset barring time length, the second control switch is controlled to be switched off, and the third control switch is controlled to be switched on;
receiving a rotation speed signal of the engine rotation speed sensor;
judging the relation between the rotating speed signal and a preset rotating speed signal;
controlling the first control switch to be switched off according to the result that the rotating speed signal is greater than or equal to the preset rotating speed signal;
the third aspect of the invention provides a starting method, before the engine is started, an electric control pre-feeding oil pump is adopted for supplying oil for pre-lubrication, after the lubricating oil in the main oil gallery reaches a certain pressure, an electric turning mechanism is adopted to enable the engine to rotate at a low speed, so that the lubricating oil can cover the whole bearing, especially a bearing area, and after the set pressure is reached, the engine is started through a starter, so that the lubricating state of the key bearing in the starting stage is enhanced, and the starting abrasion is reduced.
In some embodiments of the invention, the first action is performed as a result of the oil pressure signal being greater than or equal to a first preset oil pressure value and less than the second preset oil pressure value;
executing the second action according to the result that the engine oil pressure signal is greater than or equal to the second preset engine oil pressure value;
in some embodiments of the invention, the starting method further comprises the steps of:
and recording the time for controlling the second control switch to be closed as a third time, recording the time for controlling the engine oil pressure signal to be greater than or equal to a second preset engine oil pressure value as a fourth time, and enabling the working time of the electric turning mechanism to be equal to the difference between the fourth time and the third time.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:
FIG. 1 schematically shows a schematic configuration of an engine starting system according to an embodiment of the present invention;
FIG. 2 schematically illustrates a logic diagram of a method of cleaning a lubrication circuit according to an embodiment of the present invention;
FIG. 3 schematically illustrates a logic diagram of a startup method according to an embodiment of the invention;
the reference symbols in the drawings denote the following:
0: a start signal switch; 00: cleaning signal switch, 11: oil pan, 12: oil pump, 13: electric control pre-feeder oil pump, 14: oil filter, 15: oil cooler, 16: main oil gallery, 17: an engine oil pressure sensor; 18: ECU, 19: storage battery, 20: starter, 21: electric turning mechanism, 22: third control switch, 23: second control switch, 24: first control switch, 25: engine speed sensor, 26: spindle bush, 27: link shoe, 28: valve train, 29: piston cooling nozzle, 30: supercharger, injection pump and gear, 31: a flywheel;
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "second" and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, an element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "inner", "side", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1, a first aspect of the present invention proposes an engine starting system including:
the electric control pre-feeding oil pump 13 is used for pumping lubricating oil into a lubricating oil path of the engine by the electric control pre-feeding oil pump 13;
the first control switch 24 is connected in series with one end of the electric control pre-feed oil pump 13 and is used for controlling the opening and closing of the electric control pre-feed oil pump 13;
the electric turning mechanism 21 is used for turning the engine;
the second control switch 23 is connected in series with one end of the electric turning mechanism 21, and is used for controlling the on and off of the electric turning mechanism 21;
the engine oil pressure sensor 17, the engine oil pressure sensor 17 is used for monitoring the engine oil pressure of the engine main oil gallery 16;
the ECU18, the ECU18 are electrically connected to the oil pressure sensor 17, the third control switch 22, and the second control switch 23.
The engine starting system provided by the invention is provided with an electric control pre-feeder oil pump 13, lubricating oil can be pumped into the lubricating system of the engine for flushing before the engine is started, and the traditional lubricating system of the engine is formed by bearings such as an oil pan 11, an oil pump 12, an oil filter 14, an oil cooler 15, a main oil duct 16, a main shaft bush 26, a connecting rod bush 27, a valve train 28 friction pair, a piston cooling nozzle 29, a supercharger oil injection pump gear 30 and the like. The engine oil pressure of the engine main oil gallery 16 is monitored through the engine oil pressure sensor 17 to determine the barring time of the electric barring mechanism 21, the electric barring mechanism 21 is adopted to enable the engine to rotate at a low speed, all parts of the whole lubricating oil way can be washed conveniently, particles in the lubricating oil way can be washed out conveniently, and the cleaning effect is improved.
In some embodiments of the present invention, the engine starting system further includes a battery 19, and the battery 19 is electrically connected to the electric pre-feeder pump 13, the electric turning gear 21, and the starter 20. The electric control pre-feeder oil pump 13, the ECU18, the starter 20, the electric turning mechanism 21 and the like of the engine are all powered by the storage battery 19, so that the starting is fast and the labor is saved.
In some embodiments of the present invention, the engine starting system further includes an engine speed sensor 25, a starter 20, and a third control switch 22 connected in series to one end of the starter 20, wherein the third control switch 22 and the engine speed sensor 25 are both electrically connected to the ECU18, the engine speed sensor 25 is connected to the flywheel 31 for monitoring the engine speed, the starter 20 is used for starting the engine, and the third control switch 22 is used for controlling the starter 20 to be turned on or off. Control of which by the ECU18 is facilitated by the provision of a control switch.
As shown in fig. 2, a second aspect of the present invention provides a method for cleaning a lubricating oil passage of an engine, which is implemented by an engine starting system according to the first aspect of the present invention, and includes the steps of:
control the first control switch 24 to close;
an oil pressure signal of the receiver oil pressure sensor 17;
judging whether to control the second control switch 23 to be closed or not according to the engine oil pressure signal;
judging whether to control the first control switch 24 and the second control switch 23 to be switched off or not according to the working time of the electric turning mechanism 21;
the method for cleaning the lubricating oil path provided by the second aspect of the invention adopts the electric control pre-feeder oil pump 13 to flush the lubricating oil path, when the lubricating oil in the main oil path 16 reaches a certain pressure, the electric control driving mechanism is adopted to drive the engine to rotate at a low speed, so that the parts of the whole lubricating oil path can be conveniently flushed, the particles in the lubricating oil path can be conveniently flushed out, the cleaning effect is improved, the flushing time is recorded until the flushing is finished, then the flushing function is controlled to be closed through the ECU18, the cleaning process is automatically controlled, and the manual workload is reduced.
The method for cleaning the lubricating oil way (flushing method) comprises the following specific processes:
when the engine executes the flushing cleaning operation, the flushing signal switch is closed, the ECU18 controls the first control switch 24 to be closed, the electric control pre-feeder oil pump 13 starts to work, and the lubricating oil enters the main oil gallery 16 from the oil pan 11 through the oil filter 14 and the oil cooler 15 to start to establish the oil pressure T of the main oil gallery 16. The ECU18 monitors the oil pressure T of the main oil gallery 16 in real time via the oil pressure sensor 17. When the oil pressure signal T reaches the set target value T2, that is, T is equal to or greater than T2, the ECU18 controls the second control switch 23 to close, the electric barring engine oil starts to operate, the barring engine rotates at an extremely low rotation speed, the car washing is performed, and the time T01 is synchronously recorded. When the preset flushing time is set to be t00, and the working time t-t01 of the electric turning mechanism 21 is more than or equal to t00, the ECU18 controller controls the first control switch 24 and the second control switch 23 to be simultaneously switched off, and the flushing is finished.
In some embodiments of the present invention, the method for cleaning the lubricating oil passage further comprises the steps of:
judging the relation between the engine oil pressure signal T and a second preset engine oil pressure value;
judging the on-off state of the second control switch 23 according to the result that the engine oil pressure signal T is greater than or equal to a second preset engine oil pressure value T2;
according to the result that the second control switch 23 is in the open state, the second control switch 23 is controlled to be closed and the time is recorded as a first time t 01;
and recording the moment as a second moment t according to the result that the second control switch 23 is in the closed state. Judging the relation between the difference between the second moment t and the first moment t01 and the preset flushing time t 00;
and controlling the first control switch 24 and the second control switch 23 to be switched off according to the result that the difference between the second moment t and the first moment t01 is greater than or equal to the preset flushing time period t 00.
The cleaning time is recorded when the electric barring gear 21 is started, and after the preset flushing time is reached, the ECU18 controls the cleaning to be finished.
As shown in fig. 3, a third aspect of the present invention proposes a starting method for starting an engine, implemented according to the engine starting system proposed by the first aspect of the present invention, the starting method comprising the steps of:
control the first control switch 24 to close;
a receiver oil pressure sensor 17 monitors an oil pressure signal T of the main oil gallery 16 in real time;
judging whether to execute a first action or a second action according to the engine oil pressure signal T, wherein the first action is to judge the on-off state of the second control switch 23, and the second action is to judge the relation between the working time length of the electric barring gear 21 and the preset barring time length;
judging the on-off state of the second control switch 23 according to the result of executing the first action;
controlling the second control switch 23 to be closed according to the result that the second control switch 23 is in the open state;
judging the relationship between the working time of the electric barring gear 21 and the preset barring time t0 according to the result of executing the second action;
according to the result that the working time length is greater than or equal to the preset barring time length t0, the second control switch 23 is controlled to be opened and the third control switch 22 is controlled to be closed;
receiving a rotation speed signal n of an engine rotation speed sensor 25;
judging the relation between the rotating speed signal n and a preset rotating speed signal n 0;
controlling the first control switch 24 to be switched off according to the result that the rotating speed signal n is greater than or equal to the preset rotating speed signal n 0;
in the third aspect of the invention, before the engine is started, the electric control pre-oil supply pump 13 is adopted for supplying oil for pre-lubrication, after the lubricating oil in the main oil duct 16 reaches a certain pressure, the electric turning mechanism 21 is adopted to enable the engine to rotate at a low speed, so that the lubricating oil can cover the whole range of the friction pair of the bearing, particularly a bearing area, and after the set pressure is reached, the engine is started through the starter 20, so that the lubrication state of the key bearing in the starting stage is enhanced, and the starting abrasion is reduced.
The starting method comprises the following specific processes:
when the engine needs to be started, the start signal switch 0 is closed, the ECU18 controls the first control switch 24 to be closed, the electrically controlled pre-feeder oil pump 13 starts to work, and the lubricating oil enters the main oil gallery 16 from the oil pan 11 through the oil filter 14 and the oil cooler 15 to start to build the oil pressure T of the main oil gallery 16. The ECU18 monitors the oil pressure signal T of the main oil gallery 16 in real time via the oil pressure sensor 17. And judging whether to execute the first action or the second action according to the engine oil pressure signal T, when the T reaches a set target value T1, namely T1 is not more than T < T2, the ECU18 controls the second control switch 23 to be closed, the electric barring mechanism 21 starts to work, the barring engine rotates at an extremely low rotating speed, pre-supplied lubricating oil is smeared on the whole friction pair, the time T1 for starting barring is synchronously recorded, and a secondary nozzle for cooling the piston can be designed to spray the lubricating oil to the joint surface of the connecting rod and the small head and splash the lubricating oil to the whole cylinder sleeve. When T reaches a set target value T2, namely T is more than or equal to T2, synchronously calculating the working time length T-T1 of the electric turning mechanism 21, and when the working time length T-T1 of the electric turning mechanism 21 is less than the preset turning time length T0, continuing turning the engine to execute the work of smearing lubricating oil; when the working time t-t1 of the electric barring gear 21 is greater than or equal to the preset barring time t0, the ECU18 controls the second control switch 23 to be switched off, the electric barring gear 21 stops working, and the engine stops barring instantaneously. Meanwhile, the ECU18 controls the third control switch 22 to be closed, the starter 20 starts to work, the gear 30 of the starter 20 slowly meshes with the flywheel ring gear, and the engine is started to work normally. The ECU18 monitors the rotation speed of the engine in real time through the engine rotation speed sensor 25, and when the rotation speed n of the engine is larger than or equal to the preset rotation speed signal n0, the ECU18 controls the third control switch 22 and the first control switch 24 to be disconnected, so that the engine is started.
In some embodiments of the present invention, the first action is performed as a result of the oil pressure signal T being greater than or equal to a first preset oil pressure value T1 and less than a second preset oil pressure value T2;
executing a second action according to the result that the engine oil pressure signal T is greater than or equal to a second preset engine oil pressure value T2;
the pressure target value of the main oil passage 16 of the engine is designed into a first preset oil pressure value T1 and a second preset oil pressure value T2, and T1 is less than T2. Before starting, the electric barring gear 21 is allowed to crank the engine at a low speed when the main oil gallery 16 pressure reaches T1, and the starter 20 is allowed to start operating when the main oil gallery 16 pressure reaches T2.
In some embodiments of the invention, the starting method further comprises the steps of:
the time for controlling the second control switch 23 to close is recorded as a third time T1, the time for recording the oil pressure signal T greater than or equal to a second preset oil pressure value T2 is recorded as a fourth time T, and the working time of the electric turning mechanism 21 is equal to the difference between the fourth time T and the third time T1.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An engine starting system, comprising:
the electronic control pre-feeding oil pump is used for pumping lubricating oil into a lubricating oil path of the engine;
the first control switch is connected in series with one end of the electric control pre-feeding oil pump and is used for controlling the opening and closing of the electric control pre-feeding oil pump;
the electric barring mechanism is used for barring the engine;
the second control switch is connected in series with one end of the electric turning mechanism and used for controlling the opening and closing of the electric turning mechanism;
the engine oil pressure sensor is used for monitoring the engine oil pressure of the engine main oil gallery;
and the ECU is electrically connected with the engine oil pressure sensor, the third control switch and the second control switch.
2. The engine starting system of claim 1, further comprising a battery electrically coupled to each of the electrically controlled pre-feed pump, the electric turning gear, and the starter.
3. The engine starting system according to claim 1 or 2, characterized by further comprising an engine speed sensor, a starter, and a third control switch connected in series to one end of the starter, both the third control switch and the engine speed sensor being electrically connected to the ECU, the engine speed sensor being configured to monitor a speed of the engine, the starter being configured to start the engine, and the third control switch being configured to control on and off of the starter.
4. A method of cleaning a lubricating oil passage of an engine, which is implemented by an engine starting system according to any one of claims 1 to 3, comprising the steps of:
controlling the first control switch to be closed;
receiving an oil pressure signal of the oil pressure sensor;
judging whether to control the second control switch to be closed or not according to the engine oil pressure signal;
and judging whether to control the first control switch and the second control switch to be switched off or not according to the working time of the electric turning mechanism.
5. The method of cleaning a lubrication circuit according to claim 4, further comprising the steps of:
judging the relation between the engine oil pressure signal and a second preset engine oil pressure value;
judging the on-off state of the second control switch according to the result that the engine oil pressure signal is greater than or equal to the second preset engine oil pressure value;
controlling the second control switch to be closed according to the result that the second control switch is in an off state, and recording the moment as a first moment;
recording the current moment as a second moment according to the result that the second control switch is in a closed state, and judging the relation between the difference between the second moment and the first moment and the preset flushing time;
and controlling the first control switch and the second control switch to be switched off according to the result that the difference between the second moment and the first moment is greater than or equal to the preset flushing duration.
6. A starting method for starting an engine, implemented according to the engine starting system of claim 3, characterized by comprising the steps of:
controlling the first control switch to be closed;
the oil pressure sensor of the receiver monitors an oil pressure signal of the main oil duct in real time;
judging whether to execute a first action or a second action according to the engine oil pressure signal, wherein the first action is to judge the on-off state of the second control switch, and the second action is to judge the relation between the working time of the electric barring gear and the preset barring time;
judging the on-off state of the second control switch according to the result of executing the first action;
controlling the second control switch to be closed according to the result that the second control switch is in an off state;
judging the relation between the working time length of the electric barring gear and the preset barring time length according to the result of executing the second action;
according to the result that the working time length is greater than or equal to the preset barring time length, the second control switch is controlled to be switched off, and the third control switch is controlled to be switched on;
receiving a rotation speed signal of the engine rotation speed sensor;
judging the relation between the rotating speed signal and a preset rotating speed signal;
and controlling the first control switch to be switched off according to the result that the rotating speed signal is greater than or equal to the preset rotating speed signal.
7. The starting method according to claim 6, characterized in that it further comprises the steps of:
executing the first action according to the result that the engine oil pressure signal is greater than or equal to a first preset engine oil pressure value and smaller than a second preset engine oil pressure value;
and executing the second action according to the result that the engine oil pressure signal is greater than or equal to the second preset engine oil pressure value.
8. The starting method according to claim 6 or 7, characterized in that it further comprises the steps of:
and recording the time for controlling the second control switch to be closed as a third time, recording the time for controlling the engine oil pressure signal to be greater than or equal to a second preset engine oil pressure value as a fourth time, and enabling the working time of the electric turning mechanism to be equal to the difference between the fourth time and the third time.
9. An engine, characterized in that the engine comprises an engine starting system according to any one of claims 1 to 3.
10. The engine of claim 9, wherein the engine is a large bore engine.
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