CN111664016B - Engine control method and system and electronic equipment - Google Patents
Engine control method and system and electronic equipment Download PDFInfo
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- CN111664016B CN111664016B CN202010576187.5A CN202010576187A CN111664016B CN 111664016 B CN111664016 B CN 111664016B CN 202010576187 A CN202010576187 A CN 202010576187A CN 111664016 B CN111664016 B CN 111664016B
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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
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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
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/06—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving electric generators
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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
- F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
- F02D31/001—Electric control of rotation speed
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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
Abstract
The invention discloses a control method and a control system of an engine and electronic equipment. Wherein, the method comprises the following steps: acquiring an intake pressure parameter and an intake temperature parameter of the engine, wherein the intake pressure parameter at least comprises: the method comprises the steps that a first air inlet pressure value before mixed air enters a throttle valve of the engine and a second air inlet pressure value after the mixed air passes through the throttle valve; calculating a pressure difference value between the first intake pressure value and the second intake pressure value; if the pressure difference is lower than or equal to the pressure difference threshold, inquiring the opening of a throttle valve based on the air inlet temperature parameter; the amount of air-fuel mixture entering a cylinder of the engine is controlled based on the throttle opening to adjust the output power of the engine. The invention solves the technical problem that the engine cannot be stably controlled when running under high load.
Description
Technical Field
The invention relates to the technical field of engine control, in particular to a method and a system for controlling an engine and electronic equipment.
Background
In the related art, a natural gas engine adopts a throttle valve to control the flow of mixed gas entering a cylinder, and the throttle opening degree is different under different loads. At high load, the front and rear pressures of the throttle valve are approximately equal, the throttle valve is located at a near point of a throttle area and a non-throttle area, the small change of the opening of the throttle valve can cause large change of the air intake flow, so that the control of the power output and the rotating speed of the engine is influenced, and meanwhile, the power output of the engine cannot be further increased by controlling a supercharger on a mechanically supercharged engine, so that the power output and the rotating speed of the engine fluctuate at a near point.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the invention provides a control method and system of an engine and electronic equipment, and aims to at least solve the technical problem that the engine cannot be stably controlled when running under high load.
According to an aspect of an embodiment of the present invention, there is provided a control method of an engine, including: acquiring an intake pressure parameter and an intake temperature parameter of an engine, wherein the intake pressure parameter at least comprises: the first air inlet pressure value of the mixed air before entering a throttle valve of the engine and the second air inlet pressure value after passing through the throttle valve; calculating a pressure difference between the first intake pressure value and the second intake pressure value; if the pressure difference is lower than or equal to a pressure difference threshold, inquiring the opening of a throttle valve based on the air inlet temperature parameter; and controlling the air-fuel mixture amount entering a cylinder of the engine based on the throttle opening degree so as to regulate the output power of the engine.
Optionally, the step of querying the throttle opening degree based on the intake air temperature parameter includes: acquiring an intake temperature value of the mixed gas after passing through the throttle valve, and taking the intake temperature value as the intake temperature parameter; determining a first parameter mapping table, wherein the first parameter mapping table is used for indicating a mapping relation between the opening of a throttle valve and an inlet air temperature value; and inquiring the throttle opening corresponding to the intake temperature value behind the throttle valve based on the first parameter mapping table.
Optionally, after controlling the amount of mixture gas entering a cylinder of the engine based on the throttle opening to adjust the output power of the engine, the control method further comprises: receiving an output power boost request; acquiring a difference value between the engine load and the engine speed based on the output power lifting request; inquiring a correction value of the excess air coefficient based on the difference value between the engine load and the engine speed; adjusting the concentration of mixed gas entering a supercharger to improve the intake flow of the mixed gas entering the engine based on the corrected value of the excess air coefficient, wherein the supercharger is connected with the engine through a preset intake branch pipe, and the throttle valve is arranged on the preset intake branch pipe; after the flow of the intake air entering the engine is increased, the output power of the engine is increased so that the rotating speed of the engine reaches a target rotating speed of a power generation working condition, wherein the target rotating speed of the power generation working condition indicates the required rotating speed of the power generation working condition when the engine reaches a target power generation amount.
Optionally, the step of obtaining a difference between an engine load and an engine speed based on the output power boost request comprises: acquiring a target rotating speed and an actual rotating speed of the engine under the power generation working condition based on the output power lifting request; calculating a rotation speed difference value of the engine based on the target rotation speed and the actual rotation speed of the power generation working condition; a plurality of power parameters of the engine are obtained, and the engine load is determined based on the power parameters.
Optionally, the plurality of power parameters comprises: the method comprises the steps of obtaining a required torque of the engine, an actual torque of the engine, a current output power of the engine and an intake pressure value of a mixed gas after passing through the throttle valve, wherein the required torque of the engine indicates a torque value required by the engine to reach a target power generation amount.
Alternatively, the step of querying a correction value for the excess air ratio based on the difference between the engine load and the engine speed comprises: determining a second parameter mapping table, wherein the second parameter mapping table is used for indicating the relationship among the load of the engine, the difference value of the rotating speed and the corrected value of the excess air coefficient; and inquiring the corrected value of the excess air coefficient corresponding to the engine load and the rotating speed difference value based on the second parameter mapping table.
According to another aspect of the embodiments of the present invention, there is also provided a control system of an engine, including: the device comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring an intake pressure parameter and an intake temperature parameter of the engine, and the intake pressure parameter at least comprises: the first air inlet pressure value of the mixed air before entering a throttle valve of the engine and the second air inlet pressure value after passing through the throttle valve; a calculation unit configured to calculate a pressure difference between the first intake pressure value and the second intake pressure value; the query unit is used for querying the throttle opening degree based on the air inlet temperature parameter when the pressure difference value is lower than or equal to a pressure difference value threshold; and the adjusting unit is used for controlling the air-fuel mixture amount entering a cylinder of the engine based on the opening degree of the throttle valve so as to adjust the output power of the engine.
Optionally, the query unit includes: the first acquisition module is used for acquiring an intake temperature value of the mixed gas after passing through the throttle valve and taking the intake temperature value as the intake temperature parameter; the device comprises a first determination module, a second determination module and a control module, wherein the first determination module is used for determining a first parameter mapping table, and the first parameter mapping table is used for indicating the mapping relation between the opening of a throttle valve and an inlet air temperature value; and the first query module is used for querying the throttle opening corresponding to the intake temperature value after the throttle valve based on the first parameter mapping table.
Optionally, the control device further comprises: a receiving unit for receiving an output power boost request after controlling an amount of a mixture gas to be introduced into a cylinder of the engine based on the throttle opening to adjust an output power of the engine; the second obtaining module is used for obtaining the difference value between the engine load and the engine speed based on the output power lifting request; the second query module is used for querying the corrected value of the excess air coefficient based on the difference value of the engine load and the engine speed; the first adjusting module is used for adjusting the concentration of mixed gas entering a supercharger to improve the intake flow of the mixed gas entering the engine based on the corrected value of the excess air coefficient, wherein the supercharger is connected with the engine through a preset intake branch pipe, and the throttle valve is arranged on the preset intake branch pipe; the device comprises a first lifting module and a second lifting module, wherein the first lifting module is used for lifting the output power of the engine after the flow of the intake air entering the engine is lifted, so that the rotating speed of the engine reaches a target rotating speed of a power generation working condition, and the target rotating speed of the power generation working condition indicates the required rotating speed of the power generation working condition when the engine reaches a target power generation amount.
Optionally, the second obtaining module includes: the first obtaining submodule is used for obtaining the target rotating speed and the actual rotating speed of the power generation working condition of the engine based on the output power lifting request; the first calculation submodule is used for calculating a rotating speed difference value of the engine based on the target rotating speed and the actual rotating speed of the power generation working condition; a second acquisition submodule for acquiring a plurality of power parameters of the engine and determining the engine load based on the power parameters.
Optionally, the plurality of power parameters comprises: the method comprises the steps of obtaining a required torque of the engine, an actual torque of the engine, a current output power of the engine and an intake pressure value of a mixed gas after passing through the throttle valve, wherein the required torque of the engine indicates a torque value required by the engine to reach a target power generation amount.
Optionally, the second query module comprises: a first determining submodule for determining a second parameter map, wherein the second parameter map is used for indicating the relationship between the engine load, the rotation speed difference and the corrected value of the excess air coefficient; and the query submodule is used for querying the corrected value of the excess air coefficient corresponding to the engine load and the rotating speed difference value on the basis of the second parameter mapping table.
According to another aspect of the embodiments of the present invention, there is also provided an electronic device, including: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to perform the method of controlling the engine of any one of the above via execution of the executable instructions.
According to another aspect of the embodiments of the present invention, there is also provided a computer-readable storage medium including a stored computer program, wherein when the computer program runs, the apparatus on which the computer-readable storage medium is located is controlled to execute the control method of the engine according to any one of the above.
In the embodiment of the invention, when the engine is controlled, the air inlet pressure parameter and the air inlet temperature parameter of the engine are firstly obtained, wherein the air inlet pressure parameter at least comprises the following components: the method comprises the steps of firstly, enabling mixed gas to enter a first air inlet pressure value before a throttle valve of the engine and a second air inlet pressure value after the mixed gas passes through the throttle valve, then calculating a pressure difference value between the first air inlet pressure value and the second air inlet pressure value, inquiring the opening degree of the throttle valve based on an air inlet temperature parameter if the pressure difference value is lower than or equal to a pressure difference value threshold value, and controlling the amount of the mixed gas entering a cylinder of the engine based on the opening degree of the throttle valve so as to adjust the output power of the engine. In the embodiment, under the high-load working condition of the engine, the pressure difference value of the air inlet before and after the throttle valve is calculated, the near point of the throttle zone and the non-throttle zone is identified through the pressure difference value, and when the throttle valve is positioned at the near point, the engine is controlled to stably run in a mode of fixing the opening degree of the throttle valve, so that the technical problem that the engine cannot be stably controlled when the engine runs under the high load is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a flow chart of an alternative engine control method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an alternative engine control system according to an embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
To facilitate understanding of the invention by those skilled in the art, the following explanation is made for some terms or nouns referred to in the embodiments of the invention:
MAP: the two-dimensional array is input to X, Y to obtain corresponding output Z;
and C, CURVE: and inputting X to obtain corresponding output Y.
The following embodiments of the present application may be applied to various engines of at least: a natural gas engine for power generation.
The engine related to the application adopts a premixing technical route before supercharging, the supercharger is connected with the engine through an air inlet branch pipe, the air inlet flow of the engine is controlled through the density of mixed gas compressed by a throttle valve (also can be understood as an accelerator, and the flow of the mixed gas entering an engine cylinder is controlled through the throttling characteristic) and the supercharger (the gas before entering the engine cylinder is compressed to improve the air density), and low-pressure gas passes through a gas control valve and then is mixed with fresh air through a mixer before the supercharger to form the mixed gas.
In the embodiment of the invention, a sensor actuator is not required to be added, the problems that the rotating speed is unstable and the power output of the engine is influenced due to the fact that the throttle valve is located at the near point of a throttling area and a non-throttling area under the high-load working condition of the engine are effectively solved, and meanwhile, the power output of the engine can be improved to meet the change of the external load of the engine on the premise that the throttle valve cannot play a throttling role.
In accordance with an embodiment of the present invention, there is provided an embodiment of a method for controlling an engine, wherein the steps illustrated in the flowchart of the figure may be performed in a computer system, such as a set of computer-executable instructions, and wherein, although a logical order is illustrated in the flowchart, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
Fig. 1 is a flowchart of an alternative engine control method according to an embodiment of the present invention, as shown in fig. 1, including the steps of:
step S102, an air inlet pressure parameter and an air inlet temperature parameter of the engine are obtained, wherein the air inlet pressure parameter at least comprises: the method comprises the steps that a first air inlet pressure value before mixed air enters a throttle valve of the engine and a second air inlet pressure value after the mixed air passes through the throttle valve;
step S104, calculating a pressure difference value between the first air inlet pressure value and the second air inlet pressure value;
step S106, if the pressure difference value is lower than or equal to the pressure difference value threshold, inquiring the opening of a throttle valve based on the air inlet temperature parameter;
and step S108, controlling the air-fuel mixture amount entering a cylinder of the engine based on the opening degree of the throttle valve so as to adjust the output power of the engine.
Through the steps, when the engine is controlled, the intake pressure parameter and the intake temperature parameter of the engine can be obtained firstly, wherein the intake pressure parameter at least comprises the following steps: the method comprises the steps of firstly, enabling mixed gas to enter a first air inlet pressure value before a throttle valve of the engine and a second air inlet pressure value after the mixed gas passes through the throttle valve, then calculating a pressure difference value between the first air inlet pressure value and the second air inlet pressure value, inquiring the opening degree of the throttle valve based on an air inlet temperature parameter if the pressure difference value is lower than or equal to a pressure difference value threshold value, and controlling the amount of the mixed gas entering a cylinder of the engine based on the opening degree of the throttle valve so as to adjust the output power of the engine. In the embodiment, under the high-load working condition of the engine, the pressure difference value of the air inlet before and after the throttle valve is calculated, the near point of the throttle zone and the non-throttle zone is identified through the pressure difference value, and when the throttle valve is positioned at the near point, the engine is controlled to stably run in a mode of fixing the opening degree of the throttle valve, so that the technical problem that the engine cannot be stably controlled when the engine runs under the high load is solved.
The engine generally uses the required rotating speed of the generating working condition as the target rotating speed, such as 1500rpm or 1800rpm, and performs rotating speed PID closed-loop control to control the opening of the throttle valve through the required rotating speed and the actual rotating speed, so as to meet the change of the generating load, wherein the method for controlling the opening of the throttle valve selected by the application comprises the following steps: firstly, rotating speed PID closed-loop control is carried out, required torque is output, and a throttle valve is controlled through the conversion relation between the required torque and the required opening degree of the throttle valve; secondly, directly outputting the required opening degree of the throttle valve through rotating speed PID closed-loop control; thirdly, other parameters related to the opening degree of the throttle valve are output through rotating speed PID closed-loop control to control the throttle valve.
In the closed-loop control process of the engine, the opening of the throttle valve is increased along with the increase of the output power of the engine, when the opening of the throttle valve is positioned at a near point of a throttling area and a non-throttling area, the gas flow of mixed gas flowing through the throttle valve is unstable, and the output power and the rotating speed of the engine are easy to be unstable.
The present invention will be described in detail with reference to the above steps.
Step S102, an air inlet pressure parameter and an air inlet temperature parameter of the engine are obtained, wherein the air inlet pressure parameter at least comprises: the air-fuel ratio of the engine is controlled by the air-fuel ratio control method.
The intake air flow rate is different under the different intake temperature, therefore, this application still can obtain the intake temperature that corresponds with every throttle opening when obtaining the intake pressure value around the throttle.
And step S104, calculating a pressure difference value between the first intake pressure value and the second intake pressure value.
And step S106, if the pressure difference is lower than or equal to the pressure difference threshold, inquiring the throttle opening degree based on the air inlet temperature parameter.
In an embodiment of the present invention, the step of inquiring the opening degree of a throttle valve based on the intake air temperature parameter includes: acquiring an intake temperature value of the mixed gas after the mixed gas passes through a throttle valve, and taking the intake temperature value as an intake temperature parameter; determining a first parameter mapping table, wherein the first parameter mapping table is used for indicating the mapping relation between the opening of a throttle valve and an inlet air temperature value; and inquiring the throttle opening corresponding to the air inlet temperature value after the throttle valve based on the first parameter mapping table.
The first parameter mapping table can be a CURVE table, and the inlet air temperature value is input, so that the opening degree of a throttle valve needing to be fixed can be obtained through the table query.
And step S108, controlling the air-fuel mixture amount entering a cylinder of the engine based on the opening degree of the throttle valve so as to adjust the output power of the engine.
As an alternative embodiment of the present invention, after controlling the amount of air-fuel mixture entering a cylinder of the engine based on the throttle opening degree to adjust the output power of the engine, the control method further includes: receiving an output power boost request; acquiring a difference value between the engine load and the engine speed based on the output power lifting request; inquiring a correction value of the excess air coefficient based on the difference value between the engine load and the engine speed; adjusting the concentration of the mixed gas entering the supercharger based on the corrected value of the excess air coefficient to improve the intake flow of the mixed gas entering the engine, wherein the supercharger is connected with the engine through a preset intake branch pipe, and a throttle valve is arranged on the preset intake branch pipe; after the flow of intake air entering the engine is increased, the output power of the engine is increased so that the rotating speed of the engine reaches the target rotating speed of the power generation working condition, wherein the target rotating speed of the power generation working condition indicates the required rotating speed of the power generation working condition when the engine reaches the target power generation amount.
When the opening degree of the throttle valve is at the point close to the throttling area and the non-throttling area, the opening degree of the throttle valve is fixed at the moment, and the throttle valve cannot play a throttling role, the air mixture volume entering the engine cannot be controlled by adjusting the throttle valve, and at the moment, if the output power of the engine needs to be increased, the supercharging capacity of the supercharger needs to be improved to increase the air inflow. According to the method and the device, the concentration of the mixed gas entering the supercharger is adjusted through the corrected value of the excess air coefficient, so that the air intake flow of the mixed gas entering the engine is improved.
For the engine, the connection of the supercharger cannot be directly controlled, the exhaust gas energy is improved by thickening the mixed gas by correcting the set value of the excess air coefficient lambda, and the supercharging effect of the supercharger is further improved, so that the air inflow of the mixed gas is improved, the output power of the engine is increased, and the change of the external load of the engine is met.
Optionally, the step of obtaining the difference between the engine load and the engine speed based on the output power boost request includes: acquiring a target rotating speed and an actual rotating speed of the engine under the power generation working condition based on the output power lifting request; calculating a rotating speed difference value of the engine based on the target rotating speed and the actual rotating speed of the power generation working condition; a plurality of power parameters of the engine are obtained, and an engine load is determined based on the power parameters.
In an embodiment of the invention, the plurality of power parameters comprises: the method comprises the steps of obtaining a required torque of the engine, an actual torque of the engine, the current output power of the engine and an intake pressure value of a mixed gas after the mixed gas passes through a throttle valve, wherein the required torque of the engine indicates a torque value required by the engine to reach a target power generation amount.
Alternatively, the step of querying the correction value of the excess air ratio based on the difference between the engine load and the engine speed includes: determining a second parameter mapping table, wherein the second parameter mapping table is used for indicating the relationship among the load of the engine, the difference value of the rotating speed and the corrected value of the excess air coefficient; and inquiring the corrected value of the excess air coefficient corresponding to the engine load and the rotating speed difference value based on the second parameter mapping table.
The corrected value of the air excess coefficient Lambda set value is obtained by inquiring a second parameter mapping table according to the difference value of the engine load and the rotating speed, the second parameter mapping table can be a preset MAP table, and the corrected value of the air excess coefficient can be obtained by inputting the difference value of the engine load and the rotating speed, wherein the engine load can be represented by parameters such as required torque, actual torque, power, air intake pressure after a throttle valve and the like of the engine.
When the throttle valve cannot play a throttling role, the air mixture amount entering the engine cannot be adjusted by opening the throttle valve, and at the moment, if the power output of the engine needs to be increased, the air inlet flow is increased by improving the supercharging capacity of the supercharger. This application promotes air intake flow through the certain mode, and then promotes the pressure boost effect of booster to this air intake flow who promotes the mist increases the output of engine, satisfies the change of engine external load.
Through the embodiment, the instability of the power output and the rotating speed of the engine caused by the fact that the throttle valve is located at the close point of the throttling area and the non-throttling area under the high-load working condition of the natural gas engine for power generation can be effectively solved without adding a sensor actuator, and meanwhile, the power output of the engine can be improved to meet the change of the external load of the engine on the premise that the throttle valve cannot play a throttling role.
FIG. 2 is a schematic diagram of an alternative engine control system according to an embodiment of the present invention, which, as shown in FIG. 2, may include: an obtaining unit 21, a calculating unit 23, an inquiring unit 25, an adjusting unit 27, wherein,
an obtaining unit 21, configured to obtain an intake pressure parameter and an intake temperature parameter of the engine, where the intake pressure parameter at least includes: the method comprises the steps that a first air inlet pressure value before mixed air enters a throttle valve of the engine and a second air inlet pressure value after the mixed air passes through the throttle valve;
a calculation unit 23 for calculating a pressure difference between the first intake pressure value and the second intake pressure value;
the inquiring unit 25 is used for inquiring the opening of the throttle valve based on the air inlet temperature parameter when the pressure difference value is lower than or equal to the pressure difference value threshold value;
and an adjusting unit 27 for controlling the amount of air-fuel mixture entering the cylinders of the engine based on the throttle opening to adjust the output power of the engine.
In the control system of the engine, when the engine is controlled, the obtaining unit 21 may first obtain an intake pressure parameter and an intake temperature parameter of the engine, where the intake pressure parameter at least includes: the method comprises the steps of firstly, enabling mixed gas to enter a first air inlet pressure value before a throttle valve of the engine and secondly, enabling the mixed gas to pass through the throttle valve, then, calculating a pressure difference value between the first air inlet pressure value and the second air inlet pressure value through a calculating unit 23, inquiring the opening degree of the throttle valve through an inquiring unit 25 when the pressure difference value is lower than or equal to a pressure difference value threshold value, and controlling the amount of mixed gas entering a cylinder of the engine through an adjusting unit 27 according to the opening degree of the throttle valve so as to adjust the output power of the engine. In the embodiment, under the high-load working condition of the engine, the pressure difference value of the air inlet before and after the throttle valve is calculated, the near point of the throttle zone and the non-throttle zone is identified through the pressure difference value, and when the throttle valve is positioned at the near point, the engine is controlled to stably run in a mode of fixing the opening degree of the throttle valve, so that the technical problem that the engine cannot be stably controlled when the engine runs under the high load is solved.
Optionally, the query unit includes: the first acquisition module is used for acquiring an intake temperature value of the mixed gas after passing through the throttle valve and taking the intake temperature value as an intake temperature parameter; the first determining module is used for determining a first parameter mapping table, wherein the first parameter mapping table is used for indicating the mapping relation between the opening of a throttle valve and an inlet air temperature value; and the first query module is used for querying the throttle opening corresponding to the air inlet temperature value after the throttle valve based on the first parameter mapping table.
Alternatively, the control device further includes: a receiving unit for receiving an output power boost request after controlling an amount of a gas mixture entering a cylinder of an engine based on a throttle opening degree to adjust an output power of the engine; the second obtaining module is used for obtaining the difference value between the engine load and the engine speed based on the output power lifting request; the second query module is used for querying the corrected value of the excess air coefficient based on the difference value of the engine load and the engine speed; the first adjusting module is used for adjusting the concentration of the mixed gas entering the supercharger based on the corrected value of the excess air coefficient so as to improve the intake flow of the mixed gas entering the engine, wherein the supercharger is connected with the engine through a preset intake branch pipe, and a throttle valve is arranged on the preset intake branch pipe; the first lifting module is used for lifting the output power of the engine after lifting the air inlet flow entering the engine so as to enable the rotating speed of the engine to reach a target rotating speed of a power generation working condition, wherein the target rotating speed of the power generation working condition indicates the required rotating speed of the power generation working condition when the engine reaches a target power generation amount.
Optionally, the second obtaining module includes: the first obtaining submodule is used for obtaining a target rotating speed and an actual rotating speed of the engine under the power generation working condition based on the output power lifting request; the first calculation submodule is used for calculating the rotating speed difference value of the engine based on the target rotating speed and the actual rotating speed of the power generation working condition; the second acquisition submodule is used for acquiring a plurality of power parameters of the engine and determining the load of the engine based on the power parameters.
In an embodiment of the invention, the plurality of power parameters comprises: the method comprises the steps of obtaining a required torque of the engine, an actual torque of the engine, the current output power of the engine and an intake pressure value of a mixed gas after the mixed gas passes through a throttle valve, wherein the required torque of the engine indicates a torque value required by the engine to reach a target power generation amount.
Optionally, the second query module includes: the first determining submodule is used for determining a second parameter mapping table, wherein the second parameter mapping table is used for indicating the relation between the engine load, the rotating speed difference value and the corrected value of the excess air coefficient; and the query submodule is used for querying the corrected value of the excess air coefficient corresponding to the engine load and the rotating speed difference value on the basis of the second parameter mapping table.
The parameter adjusting device of the air conditioning equipment may further include a processor and a memory, the acquiring unit 21, the calculating unit 23, the querying unit 25, the adjusting unit 27, and the like are all stored in the memory as program units, and the processor executes the program units stored in the memory to implement corresponding functions.
The processor comprises a kernel, and the kernel calls a corresponding program unit from the memory. The kernel can be provided with one or more than one, and the air-fuel mixture amount entering the cylinder of the engine is controlled based on the opening degree of the throttle valve by adjusting the kernel parameters so as to adjust the output power of the engine.
The memory may include volatile memory in a computer readable medium, random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
According to another aspect of the embodiments of the present invention, there is also provided an electronic device, including: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to perform the method of controlling an engine of any of the above via execution of the executable instructions.
According to another aspect of the embodiments of the present invention, there is also provided a computer-readable storage medium including a stored computer program, wherein when the computer program runs, the apparatus in which the computer-readable storage medium is controlled performs the control method of the engine according to any one of the above.
The present application also provides a computer program product adapted to perform a program for initializing the following method steps when executed on a data processing device: acquiring an intake pressure parameter and an intake temperature parameter of the engine, wherein the intake pressure parameter at least comprises: the method comprises the steps that a first air inlet pressure value before mixed air enters a throttle valve of the engine and a second air inlet pressure value after the mixed air passes through the throttle valve; calculating a pressure difference value between the first intake pressure value and the second intake pressure value; if the pressure difference is lower than or equal to the pressure difference threshold, inquiring the opening of a throttle valve based on the air inlet temperature parameter; the amount of air-fuel mixture entering a cylinder of the engine is controlled based on the throttle opening to adjust the output power of the engine.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and amendments can be made without departing from the principle of the present invention, and these modifications and amendments should also be considered as the protection scope of the present invention.
Claims (8)
1. A control method of an engine, characterized by comprising:
acquiring an intake pressure parameter and an intake temperature parameter of an engine, wherein the intake pressure parameter at least comprises: the method comprises the steps that a first air inlet pressure value before mixed gas enters a throttle valve of the engine and a second air inlet pressure value after the mixed gas passes through the throttle valve, the air inlet flow of the engine is controlled through the density of the mixed gas after the throttle valve and a supercharger are compressed, and low-pressure fuel gas passes through a fuel gas control valve and then is mixed with fresh air before the supercharger through a mixer to form the mixed gas;
calculating a pressure difference between the first intake pressure value and the second intake pressure value;
if the pressure difference is lower than or equal to a pressure difference threshold, inquiring the opening of a throttle valve based on the air inlet temperature parameter, wherein the inquiring comprises the following steps: acquiring an intake temperature value of the mixed gas after passing through the throttle valve, and taking the intake temperature value as an intake temperature parameter; determining a first parameter mapping table, wherein the first parameter mapping table is used for indicating a mapping relation between the opening of a throttle valve and an inlet air temperature value; inquiring the throttle opening corresponding to the air inlet temperature value behind the throttle valve based on the first parameter mapping table;
and controlling the air mixture amount entering a cylinder of the engine based on the throttle opening degree so as to adjust the output power of the engine.
2. The control method according to claim 1, characterized in that, after controlling the amount of air-fuel mixture that enters a cylinder of the engine based on the throttle opening to adjust the output power of the engine, the control method further comprises:
receiving an output power boost request;
acquiring a difference value between the engine load and the engine speed based on the output power lifting request;
inquiring a corrected value of the excess air coefficient based on the difference value between the engine load and the engine speed;
adjusting the concentration of mixed gas entering a supercharger to improve the intake flow of the mixed gas entering the engine based on the corrected value of the excess air coefficient, wherein the supercharger is connected with the engine through a preset intake branch pipe, and the throttle valve is arranged on the preset intake branch pipe;
after the flow of the intake air entering the engine is increased, the output power of the engine is increased so that the rotating speed of the engine reaches a target rotating speed of a power generation working condition, wherein the target rotating speed of the power generation working condition indicates the required rotating speed of the power generation working condition when the engine reaches a target power generation amount.
3. The control method according to claim 2, wherein the step of obtaining a difference between an engine load and an engine speed based on the output power boost request comprises:
acquiring a target rotating speed and an actual rotating speed of the engine under the power generation working condition based on the output power lifting request;
calculating a rotation speed difference value of the engine based on the target rotation speed and the actual rotation speed of the power generation working condition;
a plurality of power parameters of the engine are obtained, and the engine load is determined based on the power parameters.
4. The control method of claim 3, wherein the plurality of power parameters comprises: the method comprises the steps of obtaining a required torque of the engine, an actual torque of the engine, a current output power of the engine and an intake pressure value of a mixed gas after passing through the throttle valve, wherein the required torque of the engine indicates a torque value required by the engine to reach a target power generation amount.
5. The control method according to claim 2, wherein the step of referring to the correction value of the excess air ratio based on the difference between the engine load and the engine speed comprises:
determining a second parameter mapping table, wherein the second parameter mapping table is used for indicating the relationship among the load of the engine, the difference value of the rotating speed and the corrected value of the excess air coefficient;
and inquiring the corrected value of the excess air coefficient corresponding to the engine load and the rotating speed difference value based on the second parameter mapping table.
6. A control system of an engine, characterized by comprising:
the device comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring an intake pressure parameter and an intake temperature parameter of the engine, and the intake pressure parameter at least comprises: the method comprises the steps that a first air inlet pressure value before mixed gas enters a throttle valve of the engine and a second air inlet pressure value after the mixed gas passes through the throttle valve, the air inlet flow of the engine is controlled through the density of the mixed gas after the throttle valve and a supercharger are compressed, and low-pressure fuel gas passes through a fuel gas control valve and then is mixed with fresh air before the supercharger through a mixer to form mixed gas;
a calculation unit configured to calculate a pressure difference between the first intake pressure value and the second intake pressure value;
the inquiring unit is used for inquiring the throttle opening degree based on the air inlet temperature parameter when the pressure difference value is lower than or equal to a pressure difference value threshold value, and comprises the following steps: the first acquisition module is used for acquiring an intake temperature value of the mixed gas after passing through the throttle valve and taking the intake temperature value as the intake temperature parameter; the device comprises a first determination module, a second determination module and a control module, wherein the first determination module is used for determining a first parameter mapping table, and the first parameter mapping table is used for indicating the mapping relation between the opening of a throttle valve and an inlet air temperature value; the first query module is used for querying the throttle opening corresponding to the intake temperature value behind the throttle valve based on the first parameter mapping table;
and the adjusting unit is used for controlling the air-fuel mixture amount entering a cylinder of the engine based on the opening degree of the throttle valve so as to adjust the output power of the engine.
7. An electronic device, comprising:
a processor; and
a memory for storing executable instructions of the processor;
wherein the processor is configured to execute the control method of the engine of any one of claims 1 to 5 via execution of the executable instructions.
8. A computer-readable storage medium, comprising a stored computer program, wherein when the computer program is run, an apparatus in which the computer-readable storage medium is located is controlled to execute a control method of an engine according to any one of claims 1 to 5.
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| CN112523882B (en) * | 2020-11-09 | 2023-04-28 | 广西玉柴船电动力有限公司 | Fuel control method for gas engine air inlet pressure closed loop |
| CN115030827A (en) * | 2021-10-20 | 2022-09-09 | 长城汽车股份有限公司 | Engine water temperature protection method and device, controller and automobile |
| CN114486264A (en) * | 2022-02-11 | 2022-05-13 | 中国第一汽车股份有限公司 | Method, system, storage medium and electronic device for controlling engine load |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006152821A (en) * | 2004-11-25 | 2006-06-15 | Denso Corp | Control system of internal combustion engine with supercharger |
| CN104533643A (en) * | 2014-12-19 | 2015-04-22 | 河南柴油机重工有限责任公司 | Gas engine lean combustion control method and system |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004251159A (en) * | 2003-02-19 | 2004-09-09 | Sanden Corp | Control valve for variable displacement swash plate type compressor |
| EP1645743B1 (en) * | 2003-07-10 | 2019-05-08 | Toyota Jidosha Kabushiki Kaisha | Method for estimating an amount of intake air supplied into a cylinder of an internal combustion engine |
| US7082924B1 (en) * | 2005-02-04 | 2006-08-01 | Caterpillar Inc | Internal combustion engine speed control |
| JP2007239650A (en) * | 2006-03-09 | 2007-09-20 | Mitsubishi Electric Corp | Controller for internal combustion engine |
| JP4650321B2 (en) * | 2006-03-28 | 2011-03-16 | トヨタ自動車株式会社 | Control device |
| JP4237214B2 (en) * | 2006-08-29 | 2009-03-11 | 三菱電機株式会社 | Internal combustion engine control device |
| US7597087B2 (en) * | 2006-10-20 | 2009-10-06 | Denso Corporation | Controller of internal combustion engine |
| CN106939826A (en) * | 2017-04-12 | 2017-07-11 | 潍柴西港新能源动力有限公司 | Natural gas engine antisurge control system and method |
-
2020
- 2020-06-22 CN CN202010576187.5A patent/CN111664016B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006152821A (en) * | 2004-11-25 | 2006-06-15 | Denso Corp | Control system of internal combustion engine with supercharger |
| CN104533643A (en) * | 2014-12-19 | 2015-04-22 | 河南柴油机重工有限责任公司 | Gas engine lean combustion control method and system |
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