CN115992772B - Engine control method, device, equipment and storage medium - Google Patents
Engine control method, device, equipment and storage medium Download PDFInfo
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- CN115992772B CN115992772B CN202310287743.0A CN202310287743A CN115992772B CN 115992772 B CN115992772 B CN 115992772B CN 202310287743 A CN202310287743 A CN 202310287743A CN 115992772 B CN115992772 B CN 115992772B
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Abstract
The invention discloses an engine control method, an engine control device, engine control equipment and a storage medium. The engine control method includes: acquiring the altitude; correcting the engine exhaust gas circulation control quantity according to the altitude, and determining a cold air inlet temperature target value according to the corrected engine exhaust gas circulation control quantity; acquiring engine working condition data, and determining a fuel injection control quantity and an engine water outlet temperature preset value according to the engine working condition data; determining the control quantity of an engine cooling device based on a preset value of the water outlet temperature of the engine and a target value of the air inlet temperature after cooling; correcting the outlet water temperature limit value of the engine according to the altitude, and determining the total fuel output control quantity according to the corrected outlet water temperature limit value of the engine; the engine work is cooperatively controlled by adopting the engine exhaust gas circulation control quantity, the fuel injection control quantity, the engine cooling device control quantity and the fuel output total control quantity.
Description
Technical Field
Embodiments of the present invention relate to control technologies, and in particular, to an engine control method, an engine control device, an engine control apparatus, and a storage medium.
Background
The engine is a main power source of commercial automobiles, engineering machinery, agricultural machinery, national defense equipment and the like, determines the dynamic property, economy and reliability of matched products, and plays a vital role in supporting economic and social development and guaranteeing national energy safety and national defense safety.
The plateau terrain of China has the characteristics of wide area, high altitude, large span and the like, and the area with the altitude of more than 3000m accounts for 26% of the total land area of China. The air pressure and oxygen content of the engine are reduced in the plateau environment, so that the engine air inflow is reduced, and the outstanding problems of reduced engine starting success rate, increased oil consumption, increased heat load and the like are easily caused. When the engineering machinery works on the plateau (for example, qinghai-Tibet plateau, which is the largest in China and the highest in the world, the average altitude is more than 4000m and is called as the world ridge), and the altitude reaches 5500m, the engine power loss can reach more than 30%, the average oil consumption is increased by 10%, and the problems of friction, wear, fatigue cracking and the like are more serious.
Based on the above, the high-performance engine (and the control method thereof) is developed to have super-strong self-adaptability, so that the high thermal efficiency and low emission can be maintained under different climates, road conditions, working conditions and altitudes, especially under the application scenes of high altitude, and the method has important strategic significance in improving the dynamic property, the economical efficiency and the reliability of engineering machinery provided with the engine.
At present, the mode of engine control based on altitude is single, and the working state of the engine is usually adjusted by directly multiplying the coefficient on the basis of the preset control parameter (for engine timing control or fuel injection quantity control), and the working state of the engine is difficult to reach the optimal state by simply adjusting the preset control parameter because an engine system is complex.
Disclosure of Invention
The invention provides an engine control method, an engine control device, engine control equipment and a storage medium, so as to achieve the purpose of improving the running state of an engine in a high-altitude area.
In a first aspect, an embodiment of the present invention provides an engine control method, including:
acquiring the altitude;
correcting an engine exhaust gas circulation control amount according to the altitude, and determining a cold intake air temperature target value according to the corrected engine exhaust gas circulation control amount;
acquiring engine working condition data, and determining a fuel injection control quantity and an engine water outlet temperature preset value according to the engine working condition data;
determining an engine cooling device control amount based on the preset engine water outlet temperature value and the target cold intake air temperature value;
Correcting an engine water outlet temperature limit value according to the altitude, and determining a total fuel output control quantity according to the corrected engine water outlet temperature limit value;
and cooperatively controlling the engine to work by adopting the engine exhaust gas circulation control quantity, the fuel injection control quantity, the engine cooling device control quantity and the fuel output total quantity control quantity.
Optionally, the engine exhaust gas circulation control amount includes: EGR valve control amount and booster electric control air release valve control amount.
Optionally, the fuel injection control amount includes: one of the pre-injection control amount, the main injection control amount and the post-injection control amount, and the injection angle control amount and the injection rail pressure control amount.
Optionally, the engine cooling device control amount includes: and controlling the quantity of the electric control water pump and the fan.
Optionally, correcting the engine exhaust gas circulation control amount according to the altitude includes:
acquiring an accelerator pedal control parameter, and determining a boost pressure target value by adopting a first MAP according to the accelerator pedal control parameter and the altitude;
and acquiring a boost pressure actual measurement value, and determining the EGR valve control quantity and the supercharger electric control air release valve control quantity by adopting a second MAP according to the boost pressure target value and the boost pressure actual measurement value.
Optionally, acquiring engine operating condition data includes: acquiring engine speed data, engine torque data and engine air inlet pressure data;
determining a fuel injection control amount according to the engine operating condition data includes:
determining the pre-injection control quantity, the main injection control quantity and the post-injection control quantity by adopting a third MAP according to the engine speed data, the engine torque data and the engine water outlet temperature;
determining the injection angle control quantity and the injection rail pressure control quantity by adopting a fourth MAP according to the air inlet pressure data of the engine;
and determining the preset value of the water outlet temperature of the engine by adopting a fifth MAP according to the engine speed data and the engine torque data.
Optionally, determining the engine cooling device control amount includes:
obtaining refrigeration control quantity by adopting an electric control model according to the preset value of the water outlet temperature of the engine and the target value of the air inlet temperature after cooling;
and determining the control quantity of the electric control water pump and the control quantity of the fan by adopting a sixth MAP according to the refrigeration control quantity, the measured value of the water outlet temperature of the engine and the measured value of the air inlet temperature after cooling.
In a second aspect, an embodiment of the present invention further provides an engine control apparatus, including an engine control unit configured to:
Acquiring the altitude;
correcting an engine exhaust gas circulation control amount according to the altitude, and determining a cold intake air temperature target value according to the corrected engine exhaust gas circulation control amount;
acquiring engine working condition data, and determining a fuel injection control quantity and an engine water outlet temperature preset value according to the engine working condition data;
determining an engine cooling device control amount based on the preset engine water outlet temperature value and the target cold intake air temperature value;
correcting an engine water outlet temperature limit value according to the altitude, and determining a total fuel output control quantity according to the corrected engine water outlet temperature limit value;
and cooperatively controlling the engine to work by adopting the engine exhaust gas circulation control quantity, the fuel injection control quantity, the engine cooling device control quantity and the fuel output total quantity control quantity.
In a third aspect, an embodiment of the present invention further provides an electronic device, including at least one processor, and a memory communicatively connected to the at least one processor;
the memory stores a computer program executable by the at least one processor, the computer program being executable by the at least one processor to enable the at least one processor to perform any one of the engine control methods described in the embodiments of the present invention.
In a fourth aspect, an embodiment of the present invention further provides a computer readable storage medium, where computer instructions are stored, where the computer instructions are configured to cause a processor to execute any one of the engine control methods described in the embodiments of the present invention.
Compared with the prior art, the invention has the beneficial effects that: the invention provides an engine control method, which is characterized in that the altitude is determined, and the engine exhaust gas circulation control quantity corresponding to an air system, the fuel injection control quantity corresponding to a combustion system, the total fuel output control quantity and the engine cooling device control quantity corresponding to a cooling system are determined according to the altitude, so that the altitude-variable self-adaptive control is realized, the requirements of multiple climates, multiple road conditions, multiple working conditions and multiple altitudes, especially high altitude are met, and the stable operation of the engine in an optimal state is ensured.
Drawings
FIG. 1 is a flow chart of an engine control method in an embodiment;
FIG. 2 is a flow chart of another engine control method in an embodiment;
FIG. 3 is a block diagram showing the structure of an engine control device in the embodiment;
fig. 4 is a schematic diagram of the electronic device structure in the embodiment.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Example 1
Fig. 1 is a flowchart of an engine control method in an embodiment, referring to fig. 1, the engine control method includes:
s101, acquiring the altitude.
In this embodiment, the manner of acquiring the altitude is not limited, for example, the environmental pressure may be acquired, and the altitude may be calculated according to the environmental pressure, where a conversion relation between the environmental pressure and the altitude may be a prior art, and details thereof are not described in detail;
alternatively, ambient pressure, ambient temperature may be collected, and altitude calculated from the ambient pressure and the ambient temperature.
S102, correcting the engine exhaust gas circulation control quantity according to the altitude, and determining a cold air inlet temperature target value according to the corrected engine exhaust gas circulation control quantity.
Illustratively, in this embodiment, the engine exhaust gas cycle is represented as: during the operation of the engine, a part of discharged exhaust gas is introduced into an air intake system, and the mixed gas (exhaust gas, fresh air and/or gas fuel) is fed into a circulation control process of combustion in a cylinder of the engine;
Accordingly, the engine exhaust gas circulation control amount is expressed as: in the above-described circulation control process, the control amount for the execution means for (exhaust gas) intake air amount control in the exhaust gas circulation control system, for example, the control amount for EGR (Exhaust Gas Recirculation, exhaust gas circulation control) control, the control amount for electromagnetic valve, etc.;
illustratively, in this embodiment, the intake air temperature after cooling is used to represent: in the above-described circulation control process, the temperature at which the cooled exhaust gas is introduced into the intake system;
accordingly, the intake air temperature target value after cooling is used for representing: when the engine exhaust gas circulation control amount is fixed, the target temperature which is reached by the exhaust gas which is led into the air inlet system after being cooled;
wherein adjusting the control amount for the EGR cooler may be employed to control the temperature of the exhaust gas after it is cooled to the above-described target temperature.
In the present embodiment, the manner of correcting the engine exhaust gas circulation control amount according to the altitude is not particularly limited;
for example, the corresponding relation between the altitude and the correction amount for the engine exhaust gas circulation control amount may be empirically determined, thereby realizing correction of the engine exhaust gas circulation control amount according to the altitude;
Or, the MAP graph of the altitude and the engine exhaust gas circulation control amount can be determined through a calibration test, and then the engine exhaust gas circulation control amount at different altitudes is determined by adopting the MAP graph, namely, when the altitude changes, the engine exhaust gas circulation control amount is corrected according to the altitude.
In the present embodiment, the manner of determining the post-cooling intake air temperature target value from the (corrected) engine exhaust gas circulation control amount is not particularly limited;
for example, the correspondence between the engine exhaust gas circulation control amount and the cold intake air temperature target value may be empirically determined, thereby achieving determination of the cold intake air temperature target value according to the engine exhaust gas circulation control amount;
alternatively, a MAP of the engine exhaust gas circulation control amount and the post-cooling intake air temperature target value may be determined through a calibration test, and when the engine exhaust gas circulation control amount is determined, the corresponding post-cooling intake air temperature target value is determined through the MAP.
S103, acquiring engine working condition data, and determining a fuel injection control quantity and an engine water outlet temperature preset value according to the engine working condition data.
For example, in this embodiment, the engine operating mode data may include engine speed data, engine torque data, gear data, engine power data, and the like, and the specific data type may be freely selected according to the requirement.
For example, in the present embodiment, the fuel injection control amount may include a fuel injection timing control amount and a fuel injection amount control amount;
the fuel injection timing control amount may include a control amount for a throttle valve (opening and closing timing), a control amount for a spark plug (advance angle), a control amount for an oil jet (oil jet sequential or alternate injection), and the like;
the fuel injection amount control amount may include a control amount for an injection pump, a control amount for a common rail supercharger, and the like.
Illustratively, in this embodiment, the engine outlet water temperature is expressed as: cooling water (liquid) for cooling the engine cools the engine;
correspondingly, the preset value of the water outlet temperature of the engine is adopted to represent: and when the working condition of the engine is fixed, the target value of the water outlet temperature of the engine is set.
In the present embodiment, the manner of determining the fuel injection control amount according to the engine operating condition data is not particularly limited;
for example, the corresponding relation between the engine working condition data and the fuel injection control quantity can be determined empirically, so that the fuel injection control quantity can be determined according to the engine working condition data;
or, the MAP of the engine working condition data and the fuel injection control quantity can be determined through a calibration test, and then the fuel injection control quantity under different engine working condition data is determined by adopting the MAP.
In this embodiment, the method for determining the preset value of the engine water outlet temperature according to the engine working condition data is not specifically limited;
for example, the corresponding relation between the engine working condition data and the preset value of the engine water outlet temperature can be determined empirically, so that the preset value of the engine water outlet temperature can be determined according to the engine working condition data;
or, a MAP of the engine working condition data and the preset engine water outlet temperature value can be determined through a calibration test, and after the engine working condition data is determined, the corresponding preset engine water outlet temperature value is determined through the MAP.
S104, determining the control quantity of the engine cooling device based on the preset value of the water outlet temperature of the engine and the target value of the air inlet temperature after cooling.
Illustratively, in the present embodiment, the engine cooling device is used for achieving cooling of the engine, and may include a (cooling) water pump, a fan, and the like;
accordingly, the engine cooling device control amount is a control amount for the engine cooling device, for example, a control amount for a water pump, a control amount for a fan, or the like.
In the present embodiment, the manner of determining the control amount of the engine cooling device according to the preset value of the water outlet temperature of the engine and the target value of the air inlet temperature after cooling is not particularly limited;
For example, a function model can be generated through sample data, an engine water outlet temperature preset value and a cold air inlet temperature target value are used as input of the function model, an engine cooling device control quantity is used as output of the function model, and after the engine water outlet temperature preset value and the cold air inlet temperature target value are determined, the corresponding engine cooling device control quantity is determined through the function model;
or, a MAP of the preset engine water outlet temperature value, the target cold intake air temperature value and the control amount of the engine cooling device can be determined through a calibration test, and when the preset engine water outlet temperature value and the target cold intake air temperature value are determined, the corresponding control amount of the engine cooling device is determined through the MAP.
S105, correcting the engine water outlet temperature limit value according to the altitude, and determining the total fuel output control quantity according to the corrected engine water outlet temperature limit value.
Illustratively, in this embodiment, the engine outlet water temperature limit is expressed as: and when the working condition of the engine is fixed, the maximum value of the water outlet temperature of the engine is obtained.
In the present embodiment, for example, the total fuel output control amount is set for control of the total amount of fuel injected to the engine for one engine cycle (720 ° corresponding to crankshaft rotation).
In the present embodiment, the way of correcting the engine outlet water temperature limit according to the altitude is not particularly limited;
for example, the corresponding relation between the altitude and the engine outlet water temperature limit value can be determined empirically, and when the altitude changes, the corresponding engine outlet water temperature limit value is determined, namely, the engine outlet water temperature limit value is corrected according to the altitude;
or, a MAP of altitude and the engine outlet temperature limit can be determined through a calibration test, and when altitude changes, the MAP is used to determine the corresponding engine outlet temperature limit.
In the present embodiment, the manner of determining the total fuel output control amount according to the engine outlet water temperature limit is not particularly limited;
for example, the corresponding relation between the engine outlet water temperature limit value and the total fuel output control quantity can be determined empirically, so that the total fuel output control quantity can be determined according to the engine outlet water temperature limit value;
or, a MAP of the engine outlet water temperature limit value and the total fuel output control amount can be determined through a calibration test, and the total fuel output control amount corresponding to the engine outlet water temperature limit value is determined by adopting the MAP.
S106, the engine work is cooperatively controlled by adopting the engine exhaust gas circulation control quantity, the fuel injection control quantity, the engine cooling device control quantity and the fuel output total control quantity.
In the present embodiment, the engine operation is controlled in cooperation with the engine exhaust gas circulation control amount, the fuel injection control amount, the engine cooling device control amount, and the total fuel output control amount in one engine operation cycle, for example.
The embodiment provides an engine control method, in which the altitude is determined, and the engine exhaust gas circulation control quantity corresponding to an air system, the fuel injection control quantity corresponding to a combustion system, the total fuel output control quantity and the engine cooling device control quantity corresponding to a cooling system are determined according to the altitude, so that the altitude-change self-adaptive control is realized, the requirements of multiple climates, multiple road conditions, multiple working conditions and multiple altitudes, especially high altitude, are met, and the stable operation of the engine in an optimal state is ensured;
the method provided by the embodiment is particularly suitable for solving the outstanding problems of power reduction, oil consumption increase, heat load increase and the like caused by the reduction of the air inflow of the engine at a high altitude, and meanwhile, the method provided by the embodiment can also be used for developing a multi-system cooperative control variable altitude self-adaptive system so as to realize the cooperative control variable altitude self-adaptive control through an air system, a combustion system and a cooling system and realize the high-performance stable operation of the engine.
On the basis of the scheme shown in fig. 1, in one possible embodiment, setting the engine exhaust gas circulation control amount includes: EGR valve control amount and booster electric control air release valve control amount.
In the scheme, the control amount of the EGR valve is set for controlling the opening degree of the EGR valve, so that the flow control of the exhaust gas entering the intake manifold through the EGR valve is realized;
the control quantity of the electric control air release valve of the supercharger is set for realizing the on-off control of the air release valve of the (turbine) supercharger, and further realizing the flow control of the exhaust gas discharged to the outside of the engine power assembly through the air release valve.
In the scheme, the initial value of the control quantity of the EGR valve and the initial value of the control quantity of the electric control bleed valve of the supercharger are determined by a calibration test;
according to different altitudes, a first correction coefficient sequence for the control quantity of the EGR valve and a second correction coefficient sequence for the control quantity of the electric control air release valve of the supercharger can be determined through a calibration test;
further, correcting an initial value of the EGR valve control amount by adopting a corresponding first correction coefficient at a specified altitude (section) to obtain the EGR valve control amount of the current altitude;
and (3) correcting the initial value of the control quantity of the electric control air release valve of the positive pressure booster by adopting a corresponding second correction coefficient at the designated altitude (section) to obtain the control quantity of the electric control air release valve of the booster at the current altitude.
As an embodiment, when the engine exhaust gas circulation control amount includes the EGR valve control amount, the supercharger electronic control purge valve control amount, the correction of the engine exhaust gas circulation control amount according to the altitude may be:
acquiring an accelerator pedal control parameter, and determining a boost pressure target value by adopting a first MAP according to the accelerator pedal control parameter and the altitude;
and acquiring a boost pressure actual measurement value, and determining the control quantity of the EGR valve and the control quantity of the electric control air release valve of the supercharger by adopting a second MAP according to the boost pressure target value and the boost pressure actual measurement value.
Illustratively, in this approach, the first MAP and the second MAP are generated based on bench tests and one-dimensional simulation calculations.
For example, in the present solution, the accelerator pedal control parameter may be an accelerator pedal stepping depth, an accelerator pedal stepping acceleration, and the like.
Illustratively, in this aspect, the boost pressure target value includes a first boost pressure target value for the EGR valve and a second boost pressure target value for the supercharger electronically controlled bleed valve;
the boost pressure actual measurement value comprises a first boost pressure actual measurement value corresponding to the EGR valve and a second boost pressure actual measurement value corresponding to the supercharger electric control air release valve;
The first boost pressure target value and the second boost pressure target value may be the same or different, and the first boost pressure actual measurement value and the second boost pressure actual measurement value may be the same or different.
Specifically, in the present solution, according to the first boost pressure target value and the first boost pressure actual measurement value, the control amount of the EGR valve is determined by using the second MAP, and at this time, the control mode for the EGR valve is an incremental control mode, that is, the control amount of the EGR valve is a control variation;
and determining the control quantity of the electric control air release valve of the supercharger by adopting a second MAP according to the second supercharging pressure target value and the second supercharging pressure actual measurement value, wherein the control mode of the electric control air release valve of the supercharger is an increment control mode, namely the control quantity of the electric control air release valve of the supercharger is a control variable quantity.
On the basis of the scheme shown in fig. 1, in one possible embodiment, setting the fuel injection control amount includes: one of the pre-injection control amount, the main injection control amount and the post-injection control amount, and the injection angle control amount and the injection rail pressure control amount.
In this embodiment, the engine is a diesel engine, specifically a high-pressure common rail diesel engine.
Illustratively, in this scheme, the main injection is used to represent the fuel (multiple) injection in the traditional sense, the pre-injection is used to represent the fuel (single or multiple) injection performed before the main injection, and the post-injection is used to represent the fuel (single or multiple) injection performed after the main injection;
The pilot injection control amount may include a pilot injection timing control amount and a pilot injection amount control amount, the main injection control amount may include a main injection timing control amount and a main injection amount control amount, and the post injection control amount may include a post injection custom control amount and a post injection amount control amount.
In this embodiment, the injection angle control amount is set as the injection advance angle control amount.
In this embodiment, the injection rail pressure control amount is set for adjusting the pressure in the (high pressure) common rail pipe, and thus the injection pressure at the time of pre-injection, the injection pressure at the time of main injection, and/or the injection pressure at the time of post-injection.
As one embodiment, the fuel injection control amount includes: when the pre-injection control amount, the main injection control amount, the post-injection control amount, the injection angle control amount and the injection rail pressure control amount are used, further, the obtaining of the engine working condition data comprises the following steps:
acquiring engine speed data, engine torque data and engine air inlet pressure data;
determining the fuel injection control amount based on the engine operating condition data includes:
determining a pre-injection control amount, a main injection control amount and a post-injection control amount by adopting a third MAP according to the engine speed data, the engine torque data and the engine water outlet temperature;
Determining an injection angle control amount and an injection rail pressure control amount by adopting a fourth MAP according to the air inlet pressure data of the engine;
and determining an engine water outlet temperature preset value by adopting a fifth MAP according to the engine speed data and the engine torque data.
For example, in this scenario, engine speed data, engine torque data, engine intake pressure data, engine outlet water temperature may be obtained by measurement or read from an engine controller.
Illustratively, in this approach, the third MAP, the fourth MAP, and the fifth MAP are generated based on bench tests and one-dimensional simulation calculations.
In one possible embodiment, the engine cooling device control amount is set to include an electronically controlled water pump control amount and a fan control amount, based on the scheme shown in fig. 1.
In one embodiment, when the engine cooling device control amount includes an electronically controlled water pump control amount, a fan control amount, further, determining the engine cooling device control amount includes:
obtaining refrigeration control quantity by adopting an electric control model according to the preset value of the water outlet temperature of the engine and the target value of the air inlet temperature after cooling, wherein the refrigeration control quantity is set as electric control water pump control quantity and fan control quantity corresponding to the preset value of the water outlet temperature of the engine and the target value of the air inlet temperature after cooling;
And determining the electric control water pump control quantity and the fan control quantity corresponding to the cooperative control (namely corresponding to the preset engine water outlet temperature value, the target cold air inlet temperature value, the actual engine water outlet temperature value and the actual cold air inlet temperature value) by adopting a sixth MAP according to the refrigeration control quantity, the actual engine water outlet temperature value and the actual cold air inlet temperature value.
Illustratively, in this scenario, the electronically controlled model is generated based on modeling results of simulation software (e.g., multisim), and the sixth MAP is generated based on bench test and one-dimensional simulation calculations.
Illustratively, in this embodiment, any of the engine control methods described above may be freely combined, and fig. 2 is a flowchart of another engine control method in the embodiment, and referring to fig. 2, for example, in one possible embodiment, the engine control method includes:
s201, acquiring the altitude.
In the scheme, the ambient pressure and the ambient temperature are obtained, and the altitude is calculated according to the ambient pressure and the ambient temperature.
S202, correcting the control quantity of the EGR valve and the control quantity of the electric control air release valve of the supercharger according to the altitude, and determining a target value of the air intake temperature after cooling according to the corrected control quantity of the EGR valve and the corrected control quantity of the electric control air release valve of the supercharger.
In the scheme, an accelerator pedal control parameter is obtained, and a first MAP is adopted to determine a supercharging pressure target value according to the accelerator pedal control parameter and the altitude;
and acquiring a boost pressure actual measurement value, and determining the control quantity of the EGR valve and the control quantity of the electric control air release valve of the supercharger by adopting a second MAP according to the boost pressure target value and the boost pressure actual measurement value.
In the scheme, a seventh MAP is adopted to determine a target value of the temperature of the air intake after cooling according to the control quantity of the EGR valve and the control quantity of the electric control air release valve of the supercharger;
and outputting a cold air inlet temperature target value (to a cooling device) after the EGR valve control quantity and the supercharger electric control air release valve control quantity reach the supercharging pressure target value correspondingly.
In the scheme, in the process of controlling the opening of the EGR valve and the opening of the electric control air release valve of the supercharger to be increased or decreased, if the rotation speed of the supercharger reaches the limit value and the opening of the electric control air release valve of the supercharger reaches the maximum, the opening of the EGR valve is controlled to be increased to reduce the rotation speed of the supercharger.
S203, acquiring engine speed data, engine torque data and engine air inlet pressure data.
S204, determining a pre-injection control amount, a main injection control amount and a post-injection control amount according to the engine rotating speed data, the engine torque data and the engine water outlet temperature.
In the scheme, a third MAP is adopted to determine the pre-injection control amount, the main injection control amount and the post-injection control amount according to the engine rotation speed data, the engine torque data and the engine water outlet temperature.
S205, determining an injection angle control quantity and an injection rail pressure control quantity according to engine air inlet pressure data.
In the scheme, according to the air inlet pressure data of the engine, a fourth MAP is adopted to determine the injection angle control quantity and the injection rail pressure control quantity.
S206, determining an engine water outlet temperature preset value according to the engine speed data and the engine torque data.
In the scheme, according to the engine speed data and the engine torque data, a fifth MAP is adopted to determine the preset value of the engine water outlet temperature.
S207, obtaining refrigeration control quantity by adopting an electric control model according to the preset value of the water outlet temperature of the engine and the target value of the air inlet temperature after cooling.
S208, determining the control quantity of the electric control water pump and the control quantity of the fan according to the refrigeration control quantity, the actual measured value of the water outlet temperature of the engine and the actual measured value of the air inlet temperature after cooling.
In the scheme, according to the refrigeration control quantity, the actual measurement value of the water outlet temperature of the engine and the actual measurement value of the air inlet temperature after cooling, a sixth MAP is adopted to determine the control quantity of the electric control water pump and the control quantity of the fan.
S209, correcting the engine water outlet temperature limit value according to the altitude, and determining the total fuel output control quantity according to the corrected engine water outlet temperature limit value.
In the scheme, according to the corrected engine water outlet temperature limit value, an eighth MAP is adopted to determine the total fuel output control quantity.
S210, controlling the engine to work by adopting at least one of an EGR valve control quantity, a booster electric control air release valve control quantity, a fuel injection control quantity, a pre-injection control quantity, an injection rail pressure control quantity, an electric control water pump control quantity, a fan control quantity, a fuel output total quantity control quantity, a main injection control quantity, a post-injection control quantity and an injection angle control quantity in a cooperative manner.
Example two
The present embodiment proposes an engine control device including an engine control unit configured to:
acquiring the altitude;
correcting the engine exhaust gas circulation control quantity according to the altitude, and determining a cold air inlet temperature target value according to the corrected engine exhaust gas circulation control quantity;
acquiring engine working condition data, and determining a fuel injection control quantity and an engine water outlet temperature preset value according to the engine working condition data;
determining the control quantity of an engine cooling device based on a preset value of the water outlet temperature of the engine and a target value of the air inlet temperature after cooling;
Correcting the outlet water temperature limit value of the engine according to the altitude, and determining the total fuel output control quantity according to the corrected outlet water temperature limit value of the engine;
the engine work is cooperatively controlled by adopting the engine exhaust gas circulation control quantity, the fuel injection control quantity, the engine cooling device control quantity and the fuel output total control quantity.
In this embodiment, the engine control unit may be specifically configured to implement any one of the engine control methods described in the first embodiment, and the implementation process and the beneficial effects thereof are the same as those of the corresponding content described in the first embodiment, which are not described herein.
Fig. 3 is a block diagram of an engine control apparatus in an example, referring to fig. 3, as an embodiment, the engine control apparatus may specifically configure an environmental parameter acquisition module 101, a pedal demand acquisition module 102, a first correction module 103, a boost pressure control module 104, an injection release control module 105, a second correction module 106, a boost pressure acquisition module 107, a third correction module 108, an electronically controlled accessory control module 109, and a combustion control module 110.
In connection with fig. 2, in this solution, the above modules may be configured to operate as follows:
The environmental parameter acquisition module 101 is configured to: and collecting the ambient pressure and the ambient temperature, and calculating the altitude according to the ambient pressure and the ambient temperature.
The pedal demand acquisition module 102 is configured to: and acquiring an accelerator pedal control parameter.
The first correction module 103 is arranged to: and determining a boost pressure target value by adopting a first MAP according to the control parameter of the accelerator pedal and the altitude.
The boost pressure control module 104 is configured to: and acquiring a boost pressure actual measurement value, and determining the control quantity of the EGR valve and the control quantity of the electric control air release valve of the supercharger by adopting a second MAP according to the boost pressure target value and the boost pressure actual measurement value.
The injection release control module 105 is provided for: and determining a pre-injection control amount, a main injection control amount and a post-injection control amount by adopting a third MAP according to the engine speed data, the engine torque data and the engine water outlet temperature.
The second correction module 106 is arranged to: and determining an engine water outlet temperature preset value by adopting a fifth MAP according to the engine speed data and the engine torque data.
The boost pressure acquisition module 107 is provided for: obtaining the actual measurement value of the boost pressure.
The third correction module 108 is arranged to: determining an injection angle control amount and an injection rail pressure control amount by adopting a fourth MAP according to the air inlet pressure data of the engine; and determining the total fuel output control quantity by adopting an eighth MAP according to the corrected engine outlet water temperature limit value.
The electronic control accessory control module 109 is arranged to: and determining the control quantity of the electric control water pump and the control quantity of the fan by adopting a sixth MAP according to the refrigeration control quantity, the measured value of the water outlet temperature of the engine and the measured value of the air inlet temperature after cooling.
The combustion control module 110 is configured to: the engine work is cooperatively controlled by at least one of an EGR valve control quantity, a booster electric control air release valve control quantity, a fuel injection control quantity, a pre-injection control quantity, an injection rail pressure control quantity, an electric control water pump control quantity, a fan control quantity, a fuel output total quantity control quantity, a main injection control quantity, a post-injection control quantity and an injection angle control quantity.
Example III
Fig. 4 shows a schematic diagram of the structure of an electronic device 10 that may be used to implement an embodiment of the invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. Electronic equipment may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 4, the electronic device 10 includes at least one processor 11, and a memory, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, etc., communicatively connected to the at least one processor 11, in which the memory stores a computer program executable by the at least one processor, and the processor 11 may perform various appropriate actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 may also be stored. The processor 11, the ROM 12 and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.
Various components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, etc.; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.
The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 11 performs the various methods and processes described above, such as an engine control method.
In some embodiments, the engine control method may be implemented as a computer program tangibly embodied on a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the engine control method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the engine control method in any other suitable manner (e.g., by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for carrying out methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (8)
1. An engine control method, characterized by comprising:
acquiring the altitude;
correcting an engine exhaust gas circulation control amount according to the altitude, and determining a cold intake air temperature target value according to the corrected engine exhaust gas circulation control amount;
acquiring engine working condition data, and determining a fuel injection control quantity and an engine water outlet temperature preset value according to the engine working condition data;
determining an engine cooling device control amount based on the preset engine water outlet temperature value and the target cold intake air temperature value;
Correcting an engine water outlet temperature limit value according to the altitude, and determining a total fuel output control quantity according to the corrected engine water outlet temperature limit value;
the engine exhaust gas circulation control quantity, the fuel injection control quantity, the engine cooling device control quantity and the fuel output total quantity control quantity are adopted to cooperatively control the engine to work;
the engine exhaust gas circulation control amount includes: EGR valve control amount, supercharger electric control bleed valve control amount;
correcting the engine exhaust gas circulation control amount according to the altitude includes:
acquiring an accelerator pedal control parameter, and determining a boost pressure target value by adopting a first MAP according to the accelerator pedal control parameter and the altitude;
and acquiring a boost pressure actual measurement value, and determining the EGR valve control quantity and the supercharger electric control air release valve control quantity by adopting a second MAP according to the boost pressure target value and the boost pressure actual measurement value.
2. The engine control method according to claim 1, characterized in that the fuel injection control amount includes: one of the pre-injection control amount, the main injection control amount and the post-injection control amount, and the injection angle control amount and the injection rail pressure control amount.
3. The engine control method according to claim 1, characterized in that the engine cooling device control amount includes: and controlling the quantity of the electric control water pump and the fan.
4. The engine control method of claim 2, wherein obtaining engine operating condition data comprises: acquiring engine speed data, engine torque data and engine air inlet pressure data;
determining a fuel injection control amount according to the engine operating condition data includes:
determining the pre-injection control quantity, the main injection control quantity and the post-injection control quantity by adopting a third MAP according to the engine speed data, the engine torque data and the engine water outlet temperature;
determining the injection angle control quantity and the injection rail pressure control quantity by adopting a fourth MAP according to the air inlet pressure data of the engine;
and determining the preset value of the water outlet temperature of the engine by adopting a fifth MAP according to the engine speed data and the engine torque data.
5. The engine control method of claim 3, wherein determining the engine cooling device control amount includes:
obtaining refrigeration control quantity by adopting an electric control model according to the preset value of the water outlet temperature of the engine and the target value of the air inlet temperature after cooling;
And determining the control quantity of the electric control water pump and the control quantity of the fan by adopting a sixth MAP according to the refrigeration control quantity, the measured value of the water outlet temperature of the engine and the measured value of the air inlet temperature after cooling.
6. An engine control apparatus, characterized by comprising an engine control unit configured to:
acquiring the altitude;
correcting an engine exhaust gas circulation control amount according to the altitude, and determining a cold intake air temperature target value according to the corrected engine exhaust gas circulation control amount;
acquiring engine working condition data, and determining a fuel injection control quantity and an engine water outlet temperature preset value according to the engine working condition data;
determining an engine cooling device control amount based on the preset engine water outlet temperature value and the target cold intake air temperature value;
correcting an engine water outlet temperature limit value according to the altitude, and determining a total fuel output control quantity according to the corrected engine water outlet temperature limit value;
the engine exhaust gas circulation control quantity, the fuel injection control quantity, the engine cooling device control quantity and the fuel output total quantity control quantity are adopted to cooperatively control the engine to work;
The engine exhaust gas circulation control amount includes: EGR valve control amount, supercharger electric control bleed valve control amount;
correcting the engine exhaust gas circulation control amount according to the altitude includes:
acquiring an accelerator pedal control parameter, and determining a boost pressure target value by adopting a first MAP according to the accelerator pedal control parameter and the altitude;
and acquiring a boost pressure actual measurement value, and determining the EGR valve control quantity and the supercharger electric control air release valve control quantity by adopting a second MAP according to the boost pressure target value and the boost pressure actual measurement value.
7. An electronic device comprising at least one processor, and a memory communicatively coupled to the at least one processor;
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the engine control method of any one of claims 1-5.
8. A computer readable storage medium storing computer instructions for causing a processor to execute the engine control method of any one of claims 1-5.
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| US4562821A (en) * | 1984-05-11 | 1986-01-07 | Toyota Jidosha Kabushiki Kaisha | System for controlling the amount of recirculated exhaust gas for a diesel engine |
| US9291091B2 (en) * | 2011-08-25 | 2016-03-22 | International Engine Intellectual Property Company, Llc | Turbocharger operation to increase brake effectiveness |
| CN105971711B (en) * | 2016-06-30 | 2018-11-16 | 潍柴动力股份有限公司 | Electric control silicone oil fan control method and device, electric control silicone oil fan and engine |
| CN109854354A (en) * | 2017-11-30 | 2019-06-07 | 中国人民解放军陆军军事交通学院 | Diesel altitude-variable cooling system with variable water flow and its control process |
| CN111120129B (en) * | 2019-12-31 | 2022-04-15 | 广西玉柴机器股份有限公司 | Method and system for reducing engine plateau power loss through EGR control |
| CN115182809A (en) * | 2022-07-29 | 2022-10-14 | 东风马勒热***有限公司 | Intelligent predictive silicone oil fan control method for commercial vehicle |
| CN115450774B (en) * | 2022-10-08 | 2023-08-18 | 一汽解放汽车有限公司 | Method and device for determining exhaust gas recirculation rate of natural gas engine and computer equipment |
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