CN111765009A - Oil supply method and system for engine and vehicle - Google Patents
Oil supply method and system for engine and vehicle Download PDFInfo
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- CN111765009A CN111765009A CN202010627198.1A CN202010627198A CN111765009A CN 111765009 A CN111765009 A CN 111765009A CN 202010627198 A CN202010627198 A CN 202010627198A CN 111765009 A CN111765009 A CN 111765009A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/224—Diagnosis of the fuel system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0611—Fuel type, fuel composition or fuel quality
- F02D2200/0612—Fuel type, fuel composition or fuel quality determined by estimation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0614—Actual fuel mass or fuel injection amount
- F02D2200/0616—Actual fuel mass or fuel injection amount determined by estimation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention provides an oil supply method and system for an engine and a vehicle, and relates to the field of vehicle engines. The method comprises the steps of firstly obtaining the rotating speed information of the engine, the oil supply quantity and the oil return quantity of an oil tank for supplying oil to the engine when the engine works at the preset power, then calculating the actual oil quantity required by the engine according to the rotating speed information, and finally adjusting the oil supply quantity according to the actual oil quantity and the oil return quantity so as to enable the oil return quantity to be equal to the preset oil quantity threshold value, thereby enabling the oil tank to supply oil at the preset power of the engine as required. The fuel pump can supply oil according to the requirement without always working at a high power point, thereby reducing the energy consumption of the whole vehicle.
Description
Technical Field
The invention relates to the field of vehicle engines, in particular to an oil supply method and system for an engine and a vehicle.
Background
At present, due to the restriction of battery technology and cost, the cost of pure electric vehicle products is high, the driving mileage is limited, and the new energy subsidy limit is greatly reduced and is cancelled step by step. The extended range automobile product not only has long endurance mileage and low fuel consumption, but also has been brought into new energy subsidy policy line by the nation.
The extended-range automobile adopts two oil supply systems, one is constant-pressure oil supply, namely, the oil pressure of the whole oil way is kept unchanged through a pressure regulating valve, and the fuel pump supplies oil at the maximum flow all the time. Alternatively, the fuel is supplied on demand, and the method controls the flow rate of the fuel pump via a fuel pump controller.
For a constant-pressure oil supply fuel system, the flow of a fuel pump is designed according to the maximum oil consumption point of a range extender, the fuel pump supplies oil according to the maximum flow when an engine works, the oil supply mode is economical for a high-power point, the oil supply mode is redundant for a power point below the high-power point, redundant oil can return to an oil tank through an oil return pipe, the energy consumption waste of the whole vehicle can be caused, and the service life of the fuel pump and the hydrocarbon emission of the whole vehicle are influenced.
And, for constant pressure fuel supply and fuel supply on demand systems, there is currently no fault diagnosis and no idle protection control strategy for the oil circuit.
Disclosure of Invention
The invention aims to provide an oil supply method for an engine, and solves the technical problem that the whole vehicle energy consumption is high in the prior art.
A further object of the first aspect of the invention is to improve the safety of the vehicle.
An object of a second aspect of the present invention is to provide an oil supply system for an engine.
It is an object of a third aspect of the invention to provide a vehicle.
According to an object of a first aspect of the present invention, there is provided a method of supplying oil to an engine, comprising:
when the engine works at a preset power, acquiring rotating speed information of the engine, and oil supply quantity and oil return quantity of an oil tank for supplying oil to the engine;
calculating the actual oil quantity required by the engine according to the rotating speed information;
and adjusting the oil supply amount according to the actual oil amount and the oil return amount so that the oil return amount is equal to a preset oil amount threshold value, and the oil is supplied to the oil tank at the preset power of the engine as required.
Optionally, after obtaining the rotation speed information of the engine, the oil supply amount of an oil tank for supplying oil to the engine, and the oil return amount when the engine is in operation at a preset power, the method further includes:
and sending a fault alarm after judging that the engine has a fault according to the rotating speed information of the engine, the oil supply quantity and the oil return quantity.
Optionally, adjusting the oil supply amount of the engine according to the actual oil amount, the oil supply amount, and the oil return amount specifically includes:
and when the oil return amount of the engine is lower than the preset oil amount threshold value, the oil supply amount of the engine is controlled to be increased, and when the oil return amount of the engine is higher than the preset oil amount threshold value, the oil supply amount of the engine is controlled to be decreased.
Optionally, the step of sending a fault alarm after determining that the engine has a fault according to the parameter information of the engine, the oil supply amount and the oil return amount specifically includes:
and when the rotating speed of the engine is detected to be zero and the oil return amount and the oil supply amount are detected to be not zero, controlling a fuel pump of the engine to stop working and sending out a fault alarm.
Optionally, after adjusting the oil supply amount according to the actual oil amount and the oil return amount, the oil supply method further includes:
detecting the rotation speed of the engine and the number of times of adjusting the oil supply amount of the engine;
and when the rotating speed of the engine changes and the oil return amount is still not equal to the preset oil amount threshold after the oil supply amount of the engine is adjusted for the preset threshold times, controlling a fuel pump of the engine to stop working and sending a fault alarm.
Optionally, the step of sending a fault alarm after determining that the engine has a fault according to the rotation speed information of the engine, the oil supply amount and the oil return amount further includes:
and when the rotating speed of the engine is detected to be zero and the oil return amount and the oil supply amount are both detected to be zero, controlling a fuel pump of the engine to stop working and sending a fault alarm.
Optionally, the preset oil amount threshold is any value ranging between 15% and 20% of the actual oil amount required when the engine is at maximum power.
Optionally, the preset threshold number of times is any number ranging from 4 times to 6 times.
According to an object of a second aspect of the present invention, there is also provided an oil supply system for an engine, characterized by comprising:
the detection module is used for acquiring the rotating speed information of the engine, the oil supply quantity of an oil tank for supplying oil to the engine and the oil return quantity when the engine works at preset power; and
the control device comprises a memory and a processor, wherein a control program is stored in the memory, and the control program is used for realizing the control method when being executed by the processor.
According to an object of a third aspect of the present invention, there is also provided a vehicle equipped with the oil supply system described above.
The method comprises the steps of firstly obtaining the rotating speed information of the engine, the oil supply quantity and the oil return quantity of an oil tank for supplying oil to the engine when the engine works at the preset power, then calculating the actual oil quantity required by the engine according to the rotating speed information, and finally adjusting the oil supply quantity according to the actual oil quantity and the oil return quantity so as to enable the oil return quantity to be equal to the preset oil quantity threshold value, thereby enabling the oil tank to supply oil at the preset power of the engine as required. The fuel pump can supply oil according to the requirement without always working at a high power point, thereby reducing the energy consumption of the whole vehicle.
Furthermore, the invention sends out a fault alarm after judging that the engine has faults according to the rotating speed information, the oil supply quantity and the oil return quantity of the engine. The invention can diagnose the fuel system of the engine and is beneficial to improving the running safety of the vehicle.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic flow chart diagram of a method of fueling an engine according to one embodiment of the present disclosure;
FIG. 2 is a schematic flow chart diagram of a method of fueling an engine according to another embodiment of the present disclosure;
FIG. 3 is a schematic block diagram of an oil supply system for an engine according to one embodiment of the present invention;
fig. 4 is a schematic configuration diagram of an oil supply system for an engine according to another embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
FIG. 1 is a schematic flow chart diagram of a method of fueling an engine according to one embodiment of the present invention. As shown in FIG. 1, in one particular embodiment, a fueling method for an engine may generally include the steps of:
s100, acquiring rotating speed information of the engine, and oil supply quantity and oil return quantity of an oil tank for supplying oil to the engine when the engine works at preset power;
s200, calculating the actual oil quantity required by the engine according to the rotating speed information;
s300, adjusting the oil supply amount according to the actual oil amount and the oil return amount to enable the oil return amount to be equal to a preset oil amount threshold value, and enabling the oil tank to supply oil according to the requirement at the preset power of the engine. Here, the preset oil amount threshold is any value ranging from 15% to 20% of the actual oil amount required when the engine is at maximum power.
The fuel pump can supply oil according to the requirement without always working at a high power point, thereby reducing the energy consumption of the whole vehicle and having better economy of the whole vehicle.
Specifically, the actual oil amount required by the engine is calculated according to the rotation speed information, specifically:
determining the torque force of the engine according to the rotation speed information, calculating the power of the engine according to a formula of the torque force, the rotation speed and the power, wherein n is a coefficient, and finally calculating the actual oil quantity required by the engine according to the fuel consumption rate under the power corresponding to the power/the gasoline density and the oil quantity required by the engine.
For an extended-range automobile, when the engine works at a certain fixed power point, the rotating speed and the torque force are fixed, and the fuel consumption rate under the fixed power is also a fixed value, so that the theoretical oil quantity required by the engine can be calculated.
Further, according to actual oil mass, fuel feeding and oil return volume regulation engine's fuel feeding, specifically include:
and when the oil return amount of the engine is higher than the preset oil amount threshold value, the oil supply amount of the engine is controlled to be increased.
In another embodiment, a method of fueling an engine further comprises:
and sending a fault alarm after judging that the engine has a fault according to the rotating speed information, the oil supply quantity and the oil return quantity of the engine. The invention can diagnose the fuel system of the engine and is beneficial to improving the running safety of the vehicle.
Further, a fault alarm is sent out after the engine is judged to have faults according to the parameter information, the oil supply quantity and the oil return quantity of the engine, and the method specifically comprises the following three conditions:
the first method comprises the following steps: when the rotating speed of the engine is detected to be zero and the oil return amount and the oil supply amount are detected to be not zero, the fuel pump of the engine is controlled to stop working, and a fault alarm is sent out. Here, it can be determined that there is a risk of clogging the fuel filter or the engine line of the engine.
And the second method comprises the following steps: when the rotating speed of the engine changes and the oil return amount is still not equal to the preset oil amount threshold after the oil supply amount of the engine is adjusted for the preset threshold times, the fuel pump of the engine is controlled to stop working, and a fault alarm is sent out. Here, if the oil return amount is not equal to the preset oil amount threshold value after the adjustment is carried out for multiple times, it can be judged that the engine oil supply system has the leakage risk. The preset threshold number is any number ranging from 4 to 6. The preset threshold times can also be set according to specific practical conditions.
And the third is that: when the rotating speed of the engine is detected to be zero and the oil return amount and the oil supply amount are detected to be zero, the fuel pump of the engine is controlled to stop working, and a fault alarm is sent out. Here, it can be determined that there is a risk of idling of the engine fuel pump. The idle rotation of the fuel pump can generate heat, so that the service life of components of the fuel pump can be influenced.
Fig. 2 is a schematic flow chart of an oil supply method for an engine according to another embodiment of the present invention. As shown in fig. 2, specifically, for the second case, namely after adjusting the oil supply amount according to the actual oil amount and the oil return amount, the oil supply method further includes the steps of:
s400, detecting the rotating speed of the engine and the number of times of adjusting the oil supply amount of the engine;
s500, when the rotating speed of the engine changes and the oil return amount is still not equal to the preset oil amount threshold after the oil supply amount of the engine is adjusted for the preset threshold times, controlling a fuel pump of the engine to stop working and sending a fault alarm.
Fig. 3 is a schematic configuration diagram of an oil supply system for an engine according to an embodiment of the present invention. As shown in fig. 3, in a specific embodiment, an oil supply system 100 for an engine includes a detection module 20 and a control device 10 connected to each other, wherein the detection module 20 is configured to obtain information about a rotation speed of the engine, an oil supply amount of a tank for supplying oil to the engine, and an oil return amount when the engine is operated at a preset power. The control device 10 includes a memory 111 and a processor 112, and a control program is stored in the memory 111, and when executed by the processor 112, is used to implement the control method in any one of the above embodiments. Fig. 4 is a schematic configuration diagram of an oil supply system 100 for an engine according to an embodiment of the present invention. As shown in fig. 4, in another embodiment, an oil supply system 100 for an engine includes an oil tank 3 for supplying oil to the engine 4, a rotation speed sensor 23, and an engine controller 11, wherein a first flow sensor 21 and a second flow sensor 22 are provided in the oil tank 3, the first flow sensor 21 is used for detecting the oil supply amount of the engine 4 when the engine 4 is operated at a preset power, and the second flow sensor 22 is used for detecting the oil return amount of the engine 4 when the engine 4 is operated at a preset power. The rotation speed sensor 23 is used to detect the rotation speed of the engine 4 when the engine 4 is operated at a preset power. The engine controller 11 is connected to the first flow sensor 21, the second flow sensor 22, and the rotation speed sensor 23, and is configured to calculate an actual oil amount required by the engine 4 according to the rotation speed information, and then adjust an oil supply amount according to the actual oil amount and an oil return amount, so that the oil return amount is equal to a preset oil amount threshold, and the oil tank 3 supplies oil at a preset power of the engine 4 as needed. Here, a fuel pump controller 12 is also provided between the engine controller 11 and the first and second flow sensors 21 and 22. In the present embodiment, the detection module 20 includes a rotation speed sensor 23, a first flow sensor 21, and a second flow sensor 22.
Referring to fig. 4, when the engine 4 is operated at a certain power point and the fuel pump in the fuel tank 3 is operated, gasoline passes through the first flow sensor 21 and then enters a high-pressure fuel rail of the engine 4 through the filter 5, excessive fuel returns to the fuel tank 3 through the fuel return pipe and the second flow sensor 22, the first flow sensor 21 and the second flow sensor 22 respectively transmit flow signals Q1 (oil supply) and Q2 (oil return) to the fuel pump controller 12 through the CAN network, the fuel pump controller 12 transmits flow signals Q1 (oil supply) and Q2 (oil return) to the engine controller 11, the rotation speed sensor 23 transmits a rotation speed signal to the engine controller 11, and the flow signal Q3 (actual oil amount) is calculated through the engine controller 11. The engine controller 11 finds Δ Q ═ Q1-Q3-Q, where Q is a fixed value, from the calculation. When Δ Q is 0 and Q2 is Q, it can be judged that the engine 4 is fuelled as needed at the current power point, the engine controller 11 sends the calculated flow signal Q1 to the fuel pump controller 12, and the fuel pump controller 12 controls the fuel pump according to the flow signal Q1. That is, the present invention needs to make Q1Q 3+ Q2 to ensure that the engine 4 is fueled on demand at the current power point. In the present embodiment, the control device 10 includes an engine controller 11 and a fuel pump controller 12.
Further, the engine controller 11 is further configured to issue a fault alarm after determining that the engine 4 has a fault according to the rotation speed information, the oil supply amount, and the oil return amount of the engine 4.
Specifically, if the rotation speed signal of the engine 4 disappears, Δ Q is 0, and the first flow sensor 21 and the second flow sensor 22 still have flow signals, it is determined that there is a risk of clogging in the fuel filter or the pipeline of the engine 4, and the engine controller 11 reports a three-stage failure and instructs to stop the operation of the fuel pump.
If the rotating speed of the engine 4 is changed, the engine controller 11 transmits a delta Q flow signal to the fuel pump controller 12, the fuel pump controller 12 converts the delta Q flow signal into a control signal to control the fuel pump, if the delta Q is not equal to 0 after being adjusted for multiple times, the leakage risk of the fuel system is judged to exist, the engine controller 11 reports a three-level fault, and a command is sent to stop the fuel pump.
If the rotating speed of the engine 4 disappears, the delta Q is equal to 0, and the first flow sensor 21 and the second flow sensor 22 have no flow signals, it is determined that the fuel pump has an idling risk, the engine 4 reports a three-level fault, and the engine instructs to stop the fuel pump.
The present invention also provides a vehicle equipped with the oil supply system 100 of any one of the above embodiments. The oil supply system 100 is not described in detail herein.
Compared with the on-demand oil supply control mode in the prior art, the invention does not need to supply oil completely on demand, only needs to select a plurality of control points (fixed power points of the engine 4) aiming at the characteristics of extended range type automobile control, can reduce the development difficulty and cost, and has relatively simple control mode.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
1. A method of fueling an engine, comprising:
the method comprises the steps that when an engine works at preset power, rotating speed information of the engine, and the oil supply quantity and the oil return quantity of an oil tank for supplying oil to the engine are obtained;
calculating the actual oil quantity required by the engine according to the rotating speed information;
and adjusting the oil supply amount according to the actual oil amount and the oil return amount so that the oil return amount is equal to a preset oil amount threshold value, and the oil is supplied to the oil tank at the preset power of the engine as required.
2. The oil supply method according to claim 1, after obtaining information on a rotation speed of an engine, an oil supply amount of a tank for supplying oil to the engine, and an oil return amount when the engine is operated at a preset power, further comprising:
and sending a fault alarm after judging that the engine has a fault according to the rotating speed information of the engine, the oil supply quantity and the oil return quantity.
3. The oil supply method according to claim 1, wherein adjusting the oil supply amount of the engine according to the actual oil amount, the oil supply amount, and the oil return amount specifically comprises:
and when the oil return amount of the engine is lower than the preset oil amount threshold value, the oil supply amount of the engine is controlled to be increased, and when the oil return amount of the engine is higher than the preset oil amount threshold value, the oil supply amount of the engine is controlled to be decreased.
4. The oil supply method according to claim 2, wherein the step of issuing a fault alarm after determining that the engine has a fault according to the rotational speed information of the engine, the oil supply amount and the oil return amount specifically comprises:
and when the rotating speed of the engine is detected to be zero and the oil return amount and the oil supply amount are detected to be not zero, controlling a fuel pump of the engine to stop working and sending out a fault alarm.
5. The oil supplying method according to claim 4, wherein after adjusting the oil supply amount according to the actual oil amount and the oil return amount, the oil supplying method further comprises:
detecting the rotation speed of the engine and the number of times of adjusting the oil supply amount of the engine;
and when the rotating speed of the engine changes and the oil return amount is still not equal to the preset oil amount threshold after the oil supply amount of the engine is adjusted for the preset threshold times, controlling a fuel pump of the engine to stop working and sending a fault alarm.
6. The oil supply method according to claim 4, wherein the step of issuing a malfunction alarm after determining that the engine has a malfunction based on the rotational speed information of the engine, the oil supply amount, and the oil return amount further comprises: and when the rotating speed of the engine is detected to be zero and the oil return amount and the oil supply amount are both detected to be zero, controlling a fuel pump of the engine to stop working and sending a fault alarm.
7. The oil supplying method according to claim 1,
the preset oil volume threshold is any value ranging from 15% to 20% of the actual oil volume required when the engine is at maximum power.
8. The oil supplying method according to claim 5,
the preset threshold number is any number ranging from 4 to 6.
9. An oil supply system for an engine, comprising:
the detection module is used for acquiring the rotating speed information of the engine, the oil supply quantity of an oil tank for supplying oil to the engine and the oil return quantity when the engine works at preset power; and
control device comprising a memory and a processor, the memory having stored therein a control program for implementing a control method according to any one of claims 1-8 when executed by the processor.
10. A vehicle, characterized in that the vehicle is equipped with the oil supply system according to claim 9.
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| CN202010627198.1A CN111765009B (en) | 2020-07-02 | 2020-07-02 | Oil supply method and system for engine and vehicle |
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| CN202010627198.1A CN111765009B (en) | 2020-07-02 | 2020-07-02 | Oil supply method and system for engine and vehicle |
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