CN113847116A - Engine oil flow control method based on engine oil temperature and pressure - Google Patents
Engine oil flow control method based on engine oil temperature and pressure Download PDFInfo
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- CN113847116A CN113847116A CN202111254618.7A CN202111254618A CN113847116A CN 113847116 A CN113847116 A CN 113847116A CN 202111254618 A CN202111254618 A CN 202111254618A CN 113847116 A CN113847116 A CN 113847116A
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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
- F01M1/02—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
- F01M2250/00—Measuring
- F01M2250/60—Operating parameters
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
The invention belongs to the technical field of engine oil flow control, and discloses an engine oil flow control method based on engine oil temperature and pressure, which comprises S1, wherein a temperature control valve is arranged at a first position of an oil pump oil outlet pipeline, and is communicated with an oil pump oil inlet pipeline when the engine oil temperature is lower than a temperature threshold value; s2, arranging a pressure control valve at a second position of the oil pump oil outlet pipeline, and communicating the pressure control valve with the oil pump oil inlet pipeline when the oil pressure is higher than or equal to a pressure threshold value; the engine oil pump oil outlet pipeline is communicated with an engine oil pump outlet and an engine lubricating system, and the engine oil pump oil inlet pipeline is communicated with an engine oil pump inlet and an engine oil tank. The engine oil flow is controlled simultaneously according to the engine oil temperature and the engine oil pressure, so that the decoupling of the engine oil flow and the engine rotating speed is realized, the engine working condition during the running of a whole vehicle is better met, the problem of engine oil flow control of a commercial vehicle engine is solved, and the energy conservation and consumption reduction are realized.
Description
Technical Field
The invention relates to the technical field of engine oil flow control, in particular to an engine oil flow control method based on engine oil temperature and pressure.
Background
With the stricter requirements on environmental protection, the technical requirements on energy conservation and consumption reduction of automobile engines, especially commercial vehicle engines, are higher and higher. The fuel saving of the whole vehicle is a key research direction, and the reduction of accessory power consumption is one of the key technical fields of fuel saving of the whole vehicle.
The engine oil flow control of the engine is an important part of the whole vehicle fuel saving scheme, the conventional engine oil flow control is mainly controlled by pressure feedback, when the engine oil pressure is higher than a set value, a pressure limiting valve is opened, and the redundant engine oil flow is transmitted from an oil pump outlet to an oil pump inlet, so that the engine oil pressure of an engine lubricating system is ensured to be stable, and meanwhile, the power consumption of the oil pump is reduced. The main problem of the engine oil flow control method is that the engine oil flow control method is strongly related to the engine rotating speed, namely, when the engine rotating speed is high, the outlet flow of an oil pump is large, and the outlet pressure easily exceeds a limit value so as to trigger the working pressure of a pressure limiting valve; when the engine is in a low rotating speed, the flow cannot be controlled because the flow of the engine oil cannot trigger the working pressure of the pressure limiting valve. In the process of matching the whole vehicle with the engine, the engine runs at a medium-low rotating speed for a long time, so that the traditional engine oil flow control method cannot achieve the oil saving effect.
Disclosure of Invention
The invention aims to provide an engine oil flow control method based on the temperature and the pressure of engine oil, so as to solve the problem of engine oil flow control of a commercial vehicle engine and realize energy conservation and consumption reduction.
In order to achieve the purpose, the invention adopts the following technical scheme:
an engine oil flow control method based on oil temperature and pressure comprises the following steps:
s1, arranging a temperature control valve at a first position of an oil pump oil outlet pipeline, and communicating the temperature control valve with the oil pump oil inlet pipeline when the temperature of the engine oil is lower than a temperature threshold value;
s2, arranging a pressure control valve at a second position of the oil pump oil outlet pipeline, and communicating the pressure control valve with the oil pump oil inlet pipeline when the oil pressure is higher than or equal to a pressure threshold value;
the engine oil pump oil outlet pipeline is communicated with an engine oil pump outlet and an engine lubricating system, and the engine oil pump oil inlet pipeline is communicated with an engine oil pump inlet and an engine oil tank.
Optionally, the temperature control valve is in a closed state when the oil temperature is higher than or equal to the temperature threshold.
Optionally, the pressure control valve is in a closed state when the oil pressure is below the pressure threshold.
Optionally, the temperature control valve is a wax valve or an electronic valve.
Optionally, the pressure control valve is a spool valve.
Optionally, the temperature threshold is 100 ℃.
Optionally, the pressure threshold is 500 KPa.
Optionally, when the temperature control valve is communicated with the oil pump oil inlet pipeline, 10% -50% of the outlet flow of the oil pump is transmitted to the oil pump oil inlet pipeline.
Optionally, when the pressure control valve is communicated with the oil pump oil inlet pipeline, 10% -50% of the outlet flow of the oil pump is transmitted to the oil pump oil inlet pipeline.
Optionally, the oil pump outlet line is provided with a temperature sensor and a pressure sensor for detecting the oil temperature and the oil pressure, respectively.
The invention has the beneficial effects that:
according to the engine oil flow control method based on the engine oil temperature and the engine oil pressure, the temperature control valve and the pressure control valve are arranged, so that the engine oil flow can be controlled simultaneously according to the engine oil temperature and the engine oil pressure, the engine oil flow and the engine rotating speed are decoupled, and the engine oil flow control method is more suitable for the working condition of an engine when a whole vehicle runs. When the engine oil is in cold start or low-load operation, the flow of the engine oil is controlled according to the pressure of the engine oil, and the flow and the pressure of an outlet of the engine oil pump at the medium and low rotating speeds can be effectively reduced, so that the driving power of the engine oil pump is reduced, the problem of controlling the flow of the engine oil of a commercial vehicle engine is solved, and energy conservation and consumption reduction are realized.
Drawings
FIG. 1 is a flow chart of an engine oil flow control method based on oil temperature and pressure of the present invention;
FIG. 2 is a schematic illustration of the positional relationship between the sump, oil pump and engine lubrication system in an embodiment of the present invention.
In the figure:
1. an oil sump; 11. an oil suction pipe; 2. an engine lubrication system; 3. an oil pump; 4. an oil inlet pipeline of an oil pump; 5. an oil pump outlet pipeline; 6. a temperature control valve; 7. a pressure control valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning. The term "plurality" is to be understood as more than two.
The invention provides an engine oil flow control method based on engine oil temperature and pressure, which adjusts and controls the engine oil flow of an engine according to two parameters of the engine oil temperature and the engine oil pressure, solves the problem of engine oil flow control of a commercial vehicle engine, and realizes energy conservation and consumption reduction. As shown in fig. 1 and fig. 2, the method for controlling engine oil flow based on oil temperature and pressure according to the present embodiment includes the following steps:
s1, arranging a temperature control valve 6 at a first position of the oil pump oil outlet pipeline 5, and communicating the temperature control valve 6 with the oil pump oil inlet pipeline 4 when the temperature of the engine oil is lower than a temperature threshold value;
s2, arranging a pressure control valve 7 at a second position of the oil pump oil outlet pipeline 5, and communicating the pressure control valve 7 with the oil pump oil inlet pipeline 4 when the oil pressure is higher than or equal to a pressure threshold value;
an oil pump oil outlet pipeline 5 is communicated with an outlet of the oil pump 3 and the engine lubricating system 2, and an oil pump oil inlet pipeline 4 is communicated with an inlet of the oil pump 3 and the oil tank 1.
As shown in fig. 2, a control system for implementing the engine oil flow control method based on the engine oil temperature and pressure according to this embodiment includes an oil tank 1, an engine lubrication system 2, and an oil pump 3, wherein the oil is stored in the oil tank 1 and discharged through an oil suction pipe 11, an oil pump inlet pipeline 4 is arranged between the oil tank 1 and an inlet of the oil pump 3 for communication, an oil pump outlet pipeline 5 is arranged between an outlet of the oil pump 3 and the engine lubrication system 2, a temperature control valve 6 and a pressure control valve 7 are arranged on the oil pump outlet pipeline 5, both the temperature control valve 6 and the pressure control valve 7 are three-way valves, and one interface is connected to the oil pump inlet pipeline 4. In the running process of the engine, the temperature and the pressure of the engine oil on the engine oil outlet pipeline 5 are detected, specifically, the temperature of the engine oil can be detected by arranging a temperature sensor, and the pressure of the engine oil can be detected by arranging a pressure sensor.
According to the engine oil flow control method based on the engine oil temperature and the engine oil pressure, the temperature control valve 6 and the pressure control valve 7 are arranged, so that the engine oil flow can be controlled respectively or simultaneously according to the engine oil temperature and the engine oil pressure, the engine oil flow and the engine rotating speed are decoupled, and the engine oil flow control method is more suitable for the working condition of an engine when a whole vehicle runs. When the engine oil is in cold start or low-load operation, the flow of the engine oil is controlled according to the pressure of the engine oil, and the outlet flow and the pressure of the engine oil pump 3 with the medium and low rotating speed can be effectively reduced, so that the driving power of the engine oil pump 3 is reduced, the problem of engine oil flow control of a commercial vehicle engine is solved, and energy conservation and consumption reduction are realized.
According to the engine oil flow control method based on the engine oil temperature and the engine oil pressure, the temperature control valve 6 and the pressure control valve 7 are arranged between the outlet of the engine oil pump 3 and the engine lubrication system 2, the conditions that the first position is close to the outlet of the engine oil pump 3 and the second position is close to the outlet of the engine oil pump 3 are included, the execution sequence is not limited by the step S1 and the step S2, any one of two parameters of the engine oil pressure and the engine oil temperature meets the judgment condition, and the operation of communicating the oil inlet pipeline 4 of the engine oil pump can be executed respectively, so that the purpose of saving oil of the engine is achieved.
Example 1: a method for controlling the flow rate of engine oil based on the temperature and pressure of the engine oil, wherein a first position is arranged close to the outlet side of an oil pump 3 relative to a second position.
As shown in figure 1, an oil suction pipe 11 is arranged at the outlet end of an oil tank 1, the oil suction pipe 11 is connected with the inlet of an oil pump 3 through an oil pump oil inlet pipeline 4, the outlet of the oil pump 3 is communicated with an engine lubricating system 2 through an oil pump oil outlet pipeline 5, and by applying the engine oil flow control method based on the engine oil temperature and pressure provided by the invention, a temperature control valve 6 is firstly arranged on the oil pump oil outlet pipeline 5, and meanwhile, a temperature sensor is arranged on the oil pump oil outlet pipeline 5.
And S1, setting the temperature threshold value as 100 ℃. When the temperature of the engine oil is lower than the temperature threshold, as shown in fig. 1, the temperature control valve 6 is communicated with the oil pump oil inlet pipeline 4, 10-50% of the outlet flow of the engine oil pump is transmitted to the oil pump oil inlet pipeline 4, and the part of the engine oil returns to the engine oil tank 1 or returns to the engine oil pump 3 again in the oil pump oil inlet pipeline 4. When the temperature of the engine oil is higher than or equal to the temperature threshold value of 100 ℃, the temperature control valve 6 is in a closed state, and the engine oil is continuously supplied to the engine lubricating system 2;
and S2, setting the pressure threshold value to be 500 Kpa. When the engine oil pressure is higher than or equal to the pressure threshold value, the pressure control valve 7 is communicated with the oil pump oil inlet pipeline 4, 10-50% of the outlet flow of the oil pump 3 is transmitted to the oil pump oil inlet pipeline 4, and the part of the engine oil returns to the engine oil tank 1 or returns to the oil pump 3 again in the oil pump oil inlet pipeline 4. When the oil pressure is lower than the pressure threshold, the pressure control valve 7 is in a closed state, and the oil is continuously supplied to the engine lubrication system 2.
This embodiment 1 controls the machine oil flow through machine oil temperature feedback earlier, satisfies the demand of engine operating condition to machine oil flow, to the engine of well low-speed operation simultaneously, judges the machine oil temperature earlier, judges machine oil pressure again, realizes that the machine oil flow is practiced thrift.
Example 2: on the basis of embodiment 1, step S2 is executed first, and then step S1 is executed, and the engine oil pressure is detected first to preferentially meet the working condition requirement of the engine on the engine oil flow, because the engine temperature is low when the engine is running at medium and low speed, the engine oil temperature is detected and judged, double judgment and detection on the engine oil flow are realized, and energy conservation and consumption reduction are realized while the engine oil flow requirement of the engine is determined.
Optionally, the temperature control valve 6 is a wax valve or an electronic valve, preferably a wax thermostat valve, when the temperature of the engine oil is lower than a temperature threshold value, the main valve is completely closed, and the bypass valve is opened; when the temperature of the engine oil is higher than or equal to the temperature threshold value, the main valve is completely opened, and the bypass valve is completely closed, so that the supply of the engine oil is realized.
Alternatively, the pressure control valve 7 is a plunger valve. Control of the oil is achieved by movement of a piston in a spool valve, as shown in fig. 2.
Optionally, the oil pump 3 is provided with a vane or a rotor, and the vane or the rotor rotates at a high speed to generate a filling tooth to suck the engine oil, apply work to the engine oil, and lift the oil pressure to ensure the normal operation of the engine lubrication system 2.
Optionally, the temperature control valve 6 and the pressure control valve 7 are respectively connected to the oil pump oil inlet pipeline 4 through a feedback pipeline, and the engine oil in the feedback oil pipeline 4 can push the rotor or the blade in the oil pump 3 to rotate, so that the displacement of the oil pump 3 is changed, and the outlet flow is reduced. The flow rate of the engine oil in the feedback oil path 4 is smaller than that of the engine oil in the engine oil pump outlet oil path 5.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. An engine oil flow control method based on engine oil temperature and pressure is characterized by comprising the following steps:
s1, arranging a temperature control valve (6) at a first position of an oil pump oil outlet pipeline (5), and when the temperature of the engine oil is lower than a temperature threshold value, communicating the temperature control valve (6) with an oil pump oil inlet pipeline (4);
s2, arranging a pressure control valve (7) at a second position of the oil pump oil outlet pipeline (5), and communicating the pressure control valve (7) with the oil pump oil inlet pipeline (4) when the oil pressure is higher than or equal to a pressure threshold value;
the engine oil pump oil outlet pipeline (5) is communicated with an outlet of the engine oil pump (3) and the engine lubricating system (2), and the engine oil pump oil inlet pipeline (4) is communicated with an inlet of the engine oil pump (3) and the engine oil tank (1).
2. The engine oil flow control method based on oil temperature and pressure according to claim 1, characterized in that the temperature control valve (6) is in a closed state when the oil temperature is higher than or equal to the temperature threshold value.
3. The engine oil flow control method based on oil temperature and pressure according to claim 1, characterized in that the pressure control valve (7) is in a closed state when the oil pressure is lower than the pressure threshold.
4. The engine oil flow control method based on oil temperature and pressure according to claim 1, characterized in that the thermostatic control valve (6) is a wax valve or an electronic valve.
5. The engine oil flow control method based on oil temperature and pressure according to claim 1, characterized in that the pressure control valve (7) is a plunger valve.
6. The engine oil flow control method based on oil temperature and pressure of claim 1, wherein the temperature threshold is 100 ℃.
7. The method of claim 1, wherein the pressure threshold is 500 KPa.
8. The engine oil flow control method based on the temperature and the pressure of the engine oil according to claim 1, characterized in that when the temperature control valve (6) is communicated with the oil pump oil inlet pipeline (4), 10% -50% of the outlet flow of the oil pump (3) is transmitted to the oil pump oil inlet pipeline (4).
9. The engine oil temperature and pressure based flow control method of engine oil according to claim 1, characterized in that when the pressure control valve (7) is communicated with the oil pump oil inlet pipeline (4), 10% -50% of the outlet flow of the oil pump (3) is transmitted to the oil pump oil inlet pipeline (4).
10. The engine oil flow control method based on oil temperature and pressure according to claim 1, characterized in that the oil pump outlet line (5) is provided with a temperature sensor and a pressure sensor for detecting the oil temperature and the oil pressure, respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111254618.7A CN113847116B (en) | 2021-10-27 | 2021-10-27 | Engine oil flow control method based on engine oil temperature and pressure |
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| CN202111254618.7A CN113847116B (en) | 2021-10-27 | 2021-10-27 | Engine oil flow control method based on engine oil temperature and pressure |
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| CN113847116B CN113847116B (en) | 2023-01-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114542231A (en) * | 2022-01-19 | 2022-05-27 | 潍柴动力股份有限公司 | Engine oil pressure control method and system and engine |
| CN115217573A (en) * | 2022-02-15 | 2022-10-21 | 广州汽车集团股份有限公司 | Engine oil conveying system and engine oil temperature control method |
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| CN105960531A (en) * | 2013-11-21 | 2016-09-21 | 皮尔伯格泵技术有限责任公司 | Variable displacement lubricant pump |
| CN109072731A (en) * | 2015-12-07 | 2018-12-21 | 马勒国际有限公司 | Fluid feed system |
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2021
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Patent Citations (4)
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| CN1928331A (en) * | 2006-09-29 | 2007-03-14 | 中国船舶重工集团公司第七一一研究所 | Modularized lubricating system for diesel engine |
| CN105960531A (en) * | 2013-11-21 | 2016-09-21 | 皮尔伯格泵技术有限责任公司 | Variable displacement lubricant pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114542231A (en) * | 2022-01-19 | 2022-05-27 | 潍柴动力股份有限公司 | Engine oil pressure control method and system and engine |
| CN115217573A (en) * | 2022-02-15 | 2022-10-21 | 广州汽车集团股份有限公司 | Engine oil conveying system and engine oil temperature control method |
| CN115217573B (en) * | 2022-02-15 | 2024-01-23 | 广州汽车集团股份有限公司 | Engine oil conveying system and engine oil temperature control method |
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