CN115750169A - Engine oil pressure linkage starting control strategy for large-cylinder-diameter diesel engine - Google Patents
Engine oil pressure linkage starting control strategy for large-cylinder-diameter diesel engine Download PDFInfo
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- CN115750169A CN115750169A CN202211459330.8A CN202211459330A CN115750169A CN 115750169 A CN115750169 A CN 115750169A CN 202211459330 A CN202211459330 A CN 202211459330A CN 115750169 A CN115750169 A CN 115750169A
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Abstract
The invention discloses a large-cylinder-diameter diesel engine oil pressure linkage starting control strategy, and relates to engine starting control. Calibrating the corresponding standard starter oil pressure according to the ambient temperature; controlling a pre-oil supply pump to supply oil, monitoring and acquiring the current starter oil pressure when the pre-oil supply pump works, and judging whether the starting requirement is met or not by a triple starting control strategy according to the current starter oil pressure, the standard starter oil pressure and the pre-oil supply frequency requirement; if yes, starting a starter; otherwise, outputting a fault prompt. The invention can meet the technical requirement of the three-time starting of the generator set and simultaneously eliminate the hidden trouble of low oil pressure of the starter of the engine.
Description
Technical Field
The present invention relates to engine start control, and more particularly, to a large bore diesel engine oil pressure coordinated start control strategy.
Background
The requirements of data centers and offshore platforms on standby power supplies are higher and higher, and diesel engines with high power and large cylinder diameters need to be pre-supplied with oil before starting and supporting, so that a safe lubricating oil film is established for a kinematic pair when the diesel engines are started in a supporting and rotating mode, the safe operation of the engines is further ensured, and mechanical problems such as dry grinding are prevented. If the large-cylinder-diameter diesel engine does not adopt any auxiliary control strategy to support the starting scene application of the generator set, the requirement of the generator set for three-time safe starting cannot be met, and the index is a key factor in the field of standby generator set power supplies.
In order to meet the starting logic requirement of the generator set in the existing market at present, a control strategy of pre-fuel supply in a single set time and three-time interval starting is adopted. Although the control strategy can meet the three-time technical requirements of the generator set, the problems of different engine oil pressures at different environmental temperatures can occur in fixed pre-oil supply time and interval time along with the change of seasons and different environmental temperatures, and the problems of large starting abrasion, high later maintenance cost and the like caused by the low hidden danger of the oil pressure of the engine starter exist.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art, provides a large-bore diesel engine oil pressure linkage starting control strategy, meets the technical requirement of three-time starting of a generator set, and eliminates the hidden trouble of low starter oil pressure of an engine.
The engine oil pressure linkage starting control strategy of the large-cylinder-diameter diesel engine provided by the invention is characterized in that the standard starter oil pressure corresponding to the engine oil pressure linkage starting control strategy is calibrated according to the ambient temperature; controlling a pre-oil supply pump to supply oil, monitoring and acquiring the current starter oil pressure when the pre-oil supply pump works, and judging whether the starting requirement is met or not by a triple starting control strategy according to the current starter oil pressure, the standard starter oil pressure and the pre-oil supply frequency requirement; if yes, starting a starter; otherwise, outputting a fault prompt.
The three-time starting control strategy is used for judging whether the starting requirement is met, and specifically comprises the following steps,
the method comprises the steps of firstly, judging whether the current starter oil pressure is equal to or greater than the standard starter oil pressure; if yes, meeting the starting oil pressure requirement and simultaneously performing the second step; otherwise, carrying out the third step;
secondly, judging whether the starter is started successfully or not; if yes, ending the starting control; otherwise, carrying out the third step;
thirdly, judging whether the times of pre-oil supply is less than or equal to the three times of oil supply requirements or not; if yes, continuing to control the pre-oil supply pump to work, and returning to the first step; otherwise, the starting oil pressure requirement is not satisfied.
If the starting requirement is not met, detecting whether a motor of the starter acts, and if the starter acts, sending an alarm prompt of low oil pressure of the starter; otherwise, sending out a starting failure alarm prompt.
The pre-oil supply pump is controlled by the ECU.
And the ECU starts the pre-oil supply pump to execute pre-oil supply after receiving a starting command of the unit instrument.
Advantageous effects
The invention has the advantages that:
1. the standard starter oil pressure is calibrated according to the environmental temperature, and a three-time starting control strategy is used for judging whether the starting requirement is met, so that when the starting requirement is met, the technical requirement of three-time starting of the generator set is met, the hidden danger of low starter oil pressure of an engine is eliminated, and the maintenance cost is reduced for customers.
2. The unit instrument is linked with the ECU, linkage control of the pre-oil supply pump and the starter is realized, no requirement on hardware is required, and the system has good universality and wide application range.
Drawings
FIG. 1 is a flow chart of a control strategy according to the present invention.
Detailed Description
The invention is further described below with reference to examples, but not to be construed as being limited thereto, and any number of modifications which can be made by anyone within the scope of the claims are also within the scope of the claims.
Referring to fig. 1, the engine oil pressure linkage starting control strategy of the large-bore diesel engine of the invention calibrates the standard starter oil pressure corresponding to the engine oil pressure according to the ambient temperature. The pressure of the starter oil can be divided into different starting oil pressure state thresholds according to different temperature thresholds of the starter oil, namely, the lower the temperature is, the larger the required starting oil pressure is, and the higher the temperature is, the smaller the required starting oil pressure is. In this regard, in the present embodiment, the ambient temperature and the starter oil pressure are related to each other, and the starter oil pressures at different ambient temperatures are set by a test means, and the starter oil pressure is used as the standard oil pressure.
After the unit instrument sends a starting command to the ECU, the ECU controls the pre-oil supply pump to execute pre-oil supply. The pre-oil supply pump of the present embodiment supplies oil at a pre-oil supply time and an interval time. When the pre-oil supply pump works, the ECU monitors and acquires the current starter oil pressure, and judges whether the starting requirement is met or not according to the current starter oil pressure, the standard starter oil pressure and the pre-oil supply frequency requirement. The specific procedure for the determination is as follows,
the method comprises the steps of firstly, judging whether the current starter oil pressure is equal to or greater than the standard starter oil pressure. If yes, the starting oil pressure requirement is met, and the second step is carried out at the same time. Otherwise, carrying out the third step;
and secondly, judging whether the starter is started successfully or not, namely judging whether the three-time starting action of the pre-oil supply pump is finished or not. If yes, the starter is started normally, and the starting control is finished. Otherwise, the third step is carried out.
And thirdly, judging whether the times of pre-oil supply is less than or equal to the three times of oil supply requirements. If yes, the pre-oil supply pump is continuously controlled to work, and the operation returns to the first step. Otherwise, the starting oil pressure requirement is not met, whether a motor of the starter acts or not is detected, and if the starter acts, an alarm prompt of low starter oil pressure is sent out. If the starter does not act, a starting failure alarm prompt is sent out.
Namely, the starting requirement needs to meet two conditions, namely whether the starting oil pressure meets the oil pressure requirement when the starter is started or not; and whether the three starting actions of the pre-oil supply pump are finished or not. When the two conditions are both met, the starter can be started, the technical requirement of the three-time starting of the generator set is met, and meanwhile, the hidden danger of low oil pressure of the starter of the engine is eliminated.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various changes and modifications without departing from the structure of the invention, which will not affect the effect of the invention and the practicability of the patent.
Claims (5)
1. The engine oil pressure linkage starting control strategy of the large-bore diesel engine is characterized in that the standard starter oil pressure corresponding to the engine oil pressure is calibrated according to the ambient temperature; controlling a pre-oil supply pump to supply oil, monitoring and acquiring the current starter oil pressure when the pre-oil supply pump works, and judging whether the starting requirement is met or not by a triple starting control strategy according to the current starter oil pressure, the standard starter oil pressure and the pre-oil supply frequency requirement; if yes, starting a starter; otherwise, outputting a fault prompt.
2. The engine oil pressure linkage starting control strategy of the large-bore diesel engine according to claim 1, wherein the three-time starting control strategy is used for judging whether the starting requirement is met, and specifically comprises,
the method comprises the steps of firstly, judging whether the current starter oil pressure is equal to or greater than the standard starter oil pressure; if yes, the starting oil pressure requirement is met, and meanwhile the second step is carried out; otherwise, carrying out the third step;
secondly, judging whether the starter is started successfully or not; if yes, ending the starting control; otherwise, carrying out the third step;
thirdly, judging whether the times of pre-oil supply is less than or equal to the three times of oil supply requirements or not; if so, continuing to control the pre-oil supply pump to work, and returning to the first step; otherwise, the starting oil pressure requirement is not satisfied.
3. The large-bore diesel engine oil pressure linkage starting control strategy according to claim 2, characterized in that if the starting requirement is not met, whether a motor of the starter is operated is detected, and if the starter is operated, a starter oil pressure low alarm prompt is given; otherwise, sending out a starting failure alarm prompt.
4. The large bore diesel engine oil pressure linked start control strategy of claim 1, 2 or 3, characterized in that the pre-oil supply pump is controlled by the ECU.
5. The large bore diesel engine oil pressure linked start control strategy of claim 4, wherein the ECU starts a pre-fueling pump to perform pre-fueling after receiving a start command from a crew meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211459330.8A CN115750169A (en) | 2022-11-16 | 2022-11-16 | Engine oil pressure linkage starting control strategy for large-cylinder-diameter diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211459330.8A CN115750169A (en) | 2022-11-16 | 2022-11-16 | Engine oil pressure linkage starting control strategy for large-cylinder-diameter diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115750169A true CN115750169A (en) | 2023-03-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211459330.8A Pending CN115750169A (en) | 2022-11-16 | 2022-11-16 | Engine oil pressure linkage starting control strategy for large-cylinder-diameter diesel engine |
Country Status (1)
| Country | Link |
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| CN (1) | CN115750169A (en) |
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2022
- 2022-11-16 CN CN202211459330.8A patent/CN115750169A/en active Pending
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