CN114233497B - Engine control method, system and equipment - Google Patents
Engine control method, system and equipment Download PDFInfo
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- CN114233497B CN114233497B CN202111529032.7A CN202111529032A CN114233497B CN 114233497 B CN114233497 B CN 114233497B CN 202111529032 A CN202111529032 A CN 202111529032A CN 114233497 B CN114233497 B CN 114233497B
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- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000002485 combustion reaction Methods 0.000 claims abstract description 19
- 239000000446 fuel Substances 0.000 claims description 22
- 230000004913 activation Effects 0.000 claims description 21
- 238000007781 pre-processing Methods 0.000 claims description 18
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 239000000295 fuel oil Substances 0.000 claims description 2
- 238000010304 firing Methods 0.000 description 28
- 238000010586 diagram Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 238000004590 computer program Methods 0.000 description 3
- 239000002283 diesel fuel Substances 0.000 description 3
- 235000012419 Thalia geniculata Nutrition 0.000 description 2
- 244000145580 Thalia geniculata Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/08—Introducing corrections for particular operating conditions for idling
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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
- F02D37/00—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for
- F02D37/02—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for one of the functions being ignition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/008—Controlling each cylinder individually
- F02D41/0087—Selective cylinder activation, i.e. partial cylinder operation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/009—Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
Abstract
The application discloses a control method, a control system and control equipment of an engine, wherein the method comprises the following steps: determining an ignition cycle set of the engine based on an idle condition of the engine; determining the ignition sequence of each cylinder of the engine aiming at any ignition cycle in the set, and generating ignition mark signals of each cylinder; for any cylinder, an ignition control signal is generated according to an ignition sign signal of the cylinder, so that the engine performs a corresponding operation according to the ignition control signal. According to the control method of the engine, when the engine is in the idle working condition, the engine is enabled to execute a plurality of ignition cycles, each ignition cycle corresponds to a specific ignition sequence, ignition combustion of part of cylinders is controlled, other cylinders are not combusted, and the thermal efficiency of the engine is improved.
Description
Technical Field
The present disclosure relates to the field of control technologies, and in particular, to a method, a system, and an apparatus for controlling an engine.
Background
The idle speed condition is a condition in which the engine is not required to drive the vehicle to run when the vehicle is stationary or idling. For example, the automobile is temporarily stopped at a traffic light, temporarily stopped at a traffic jam, or the like, that is, the vehicle is stopped and the engine is in a normally started state.
In the prior art, when the engine is in an idle working condition, all cylinders of the engine are subjected to oil injection combustion, so that the content of fuel which is not fully combusted in an exhausted body is relatively high, unnecessary fuel consumption is caused, and the thermal efficiency of the engine is relatively low.
Disclosure of Invention
The embodiment of the application provides a control method, a control system and control equipment of an engine, so as to improve the thermal efficiency of the engine.
In a first aspect, an embodiment of the present application provides a control method of an engine, including:
determining an ignition cycle set of an engine based on an idle condition of the engine;
determining the ignition sequence of each cylinder of the engine for any ignition cycle in the set, and generating an ignition mark signal of each cylinder;
and generating an ignition control signal according to an ignition mark signal of any one of the cylinders, so that the engine executes corresponding operation according to the ignition control signal.
In one possible embodiment, the determining the firing order of each cylinder of the engine for any firing cycle in the set includes:
and determining an activation proportion corresponding to the ignition cycle for any ignition cycle in the set, and determining the ignition sequence of each cylinder of the engine according to the activation proportion, wherein the activation proportion is the ratio of the number of cylinders subjected to ignition combustion to the total number of cylinders of the engine.
In one possible implementation manner, the generating an ignition control signal according to the ignition sign signal of the cylinder includes:
when the ignition mark signal of the cylinder is ignition, an ignition control signal for normally opening and closing the air inlet valve, injecting fuel oil by the fuel injector and normally opening and closing the air outlet valve is generated.
In one possible implementation manner, the generating an ignition control signal according to the ignition sign signal of the cylinder includes:
and when the ignition mark signal of the cylinder is non-ignition, generating an ignition control signal without fuel injection and with the exhaust valve closed.
In one possible embodiment, the determining the set of ignition cycles of the engine based on the idle condition of the engine includes:
and determining an ignition cycle set of the engine based on the rotating speed of the engine and the required torque, wherein the rotating speed is smaller than or equal to a preset rotating speed, the required torque is smaller than or equal to a preset required torque, the rotating speed is calculated according to a crank shaft sensor signal and a cam shaft sensor signal, and the required torque is obtained by searching a required torque table according to an accelerator pedal position sensor signal.
In one possible embodiment, the method further comprises:
the engine executes a preset control method when at least one of the rotational speed greater than the preset rotational speed or the required torque greater than the preset required torque is satisfied.
In a second aspect, embodiments of the present application provide a control system for an engine, the system comprising: the device comprises a preprocessing unit, a basic control unit and an ignition processing unit;
the preprocessing unit is used for acquiring signals of an engine sensor, preprocessing the signals and then sending the preprocessed signals to the basic control unit;
the base control unit is used for determining an ignition cycle set of the engine based on the preprocessed signals;
the ignition processing unit is used for determining the ignition sequence of each cylinder of the engine for any ignition cycle in the set and generating an ignition mark signal of each cylinder;
the basic control unit is further used for generating an ignition control signal according to the ignition mark signal of any one of the cylinders so that the engine can execute corresponding operation according to the ignition control signal.
In one possible implementation manner, the basic control unit is specifically configured to generate, for any cylinder, a first control signal and a second control signal according to an ignition sign signal of the cylinder, where the first control signal is used to control the operation of the fuel injector, and the second control signal is used to control the operation of the intake valve and the exhaust valve of the cylinder.
In one possible implementation manner, the preprocessing unit is specifically configured to acquire a signal of a crank sensor, a signal of a cam shaft sensor, and a signal of an accelerator pedal position sensor, and send the signals to the basic control unit after preprocessing the signals.
In a third aspect, an embodiment of the present application provides a control apparatus of an engine, the apparatus including: a memory and a processor;
the memory is used for storing related program codes;
the processor is configured to invoke the program code to execute the method according to any one of the implementation manners of the first aspect.
In a fourth aspect, the embodiments of the present application further provide a computer readable storage medium, where the computer readable storage medium is configured to store a computer program, where the computer program is configured to perform the method according to any one of the embodiments of the first aspect.
In the above implementation manner of the embodiment of the present application, the ignition cycle set of the engine is determined based on the idle speed condition of the engine; determining the ignition sequence of each cylinder of the engine aiming at any ignition cycle in the set, and generating ignition mark signals of each cylinder; for any cylinder, an ignition control signal is generated according to an ignition sign signal of the cylinder, so that the engine performs a corresponding operation according to the ignition control signal. According to the control method of the engine, when the engine is in the idle working condition, the engine is enabled to execute a plurality of ignition cycles, each ignition cycle corresponds to a specific ignition sequence, ignition combustion of part of cylinders is controlled, other cylinders are not combusted, and the thermal efficiency of the engine is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments provided in the present application, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
FIG. 1 is a flow chart of a method of controlling an engine according to an embodiment of the present disclosure;
FIG. 2 is a flow chart of another engine control method in an embodiment of the present application;
FIG. 3 is a schematic diagram of a control system of an engine according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a control system of another engine according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of a control apparatus of an engine in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, where the described embodiments are only exemplary implementations of the present application, and not all implementations. Those skilled in the art can combine the embodiments of the present application to obtain other embodiments without inventive faculty, and such embodiments are also within the scope of the present application.
When the engine is in an idle working condition, the engine is not required to drive the vehicle to run, but at the moment, all cylinders of the engine can be ignited and burnt, so that the content of fuel which is not fully burnt in an exhausted body is relatively high, unnecessary fuel consumption is caused, and the thermal efficiency of the engine is relatively low. The thermal efficiency of an engine is the ratio of the heat converted into mechanical work in the engine to the heat consumed, and is an important index for measuring the economic performance of the engine.
Based on this, the embodiment of the application provides a control method of an engine so as to improve the thermal efficiency of the engine. When the method is specifically implemented, an ignition cycle set of the engine is determined based on an idle working condition of the engine; determining the ignition sequence of each cylinder of the engine aiming at any ignition cycle in the set, and generating ignition mark signals of each cylinder; for any cylinder, an ignition control signal is generated according to an ignition sign signal of the cylinder, so that the engine performs a corresponding operation according to the ignition control signal. According to the control method of the engine, when the engine is in the idle working condition, the engine is enabled to execute a plurality of ignition cycles, each ignition cycle corresponds to a specific ignition sequence, ignition combustion of part of cylinders is controlled, other cylinders are not combusted, and the thermal efficiency of the engine is improved.
The working principle of the engine will be described below in connection with a specific scenario, and a six-cylinder engine is taken as an example for illustration, i.e. the engine comprises 6 cylinders, the cylinder numbers of each cylinder are respectively 1, 2, 3, 4, 5 and 6.
The engine typically includes four piston strokes, an intake stroke, a compression stroke, a power stroke, and an exhaust stroke, during a complete ignition cycle.
Specifically, the engine opens the intake valve, the piston in the cylinder moves from top dead center to bottom dead center, and gas is drawn in until the piston moves to bottom dead center, closing the intake valve.
Then the piston moves upward to compress the gas in the cylinder, the gas temperature increases, and the in-cylinder pressure increases.
In the power stroke, the ignition modes of different types of engines are different, the gasoline engine directly ignites the combustible gas by utilizing the arc discharge principle between two electrodes of the spark plug, and diesel oil is injected when the compression stroke of the diesel engine is about to end, and the temperature in the cylinder exceeds the self-ignition temperature of the diesel oil at the moment, so that the self-ignition can occur after the diesel oil and air are mixed. The high-temperature high-pressure gas pushes the piston to move towards the bottom dead center quickly, and work is externally applied through the crank connecting rod mechanism.
When the power stroke is about to end, the exhaust valve is opened, the piston moves to the upper dead center beyond the lower dead center, and the exhaust gas in the cylinder is discharged.
The engine completes an ignition cycle through four strokes of air intake, compression, work application and air exhaust, in the process, the piston reciprocates up and down for four strokes, and the corresponding crankshaft rotates for two circles, namely 720 degrees.
The working principle of the control method of the engine provided by the application will be described below with reference to the accompanying drawings.
Referring to fig. 1, a flowchart of a control method of an engine according to an embodiment of the present application is provided.
The method specifically comprises the following steps:
s101: an ignition cycle set of the engine is determined based on an idle condition of the engine.
When the engine is in an idle working condition, ignition and combustion of all cylinders of the engine are not required to be controlled, and an ignition cycle set of the engine, namely a set comprising a plurality of ignition cycles, can be determined according to the specific working condition of the engine. The idle speed condition of the engine may include: the engine speed and the required torque, and the engine speed is less than or equal to a preset speed and the required torque is less than or equal to a preset required torque. Different rotational speeds and torque demands correspond to different idle conditions.
The engine can determine the crankshaft position of the engine according to signals acquired by the crankshaft sensor and the camshaft sensor, and can search a pre-calibrated required torque table according to signals acquired by the accelerator pedal position sensor to determine the required torque under the current working condition of the engine. If the rotation speed or the required torque of the engine exceeds a preset range, namely, only partial cylinder ignition combustion is controlled, the power requirement of the engine cannot be met, the engine cannot execute the control method, and the engine can realize normal operation according to other preset control methods.
When the engine is at some idle condition, there may be more than one corresponding firing cycle, and each firing cycle corresponds to a particular firing order. In practical application, the corresponding relation between the idle working condition of the engine and the ignition cycle set can be calibrated in advance through experiments so as to achieve the best possible thermal efficiency of the engine.
In addition, when the experiment is calibrated, the type of the engine, NVH characteristics of the engine and the like can be comprehensively considered, so that a corresponding ignition cycle set and a corresponding activation proportion of the ignition cycle of the engine under the idle working condition are determined. The NVH characteristics of an engine refer to noise, vibration and harshness (Noise, vibration, harshness), which is a comprehensive issue in measuring the quality of automobile manufacturing. In order to achieve the best possible thermal efficiency of the engine, the NVH characteristics of the engine are also made to meet prescribed requirements, for example, the vibration of the engine is below a prescribed vibration limit.
S102: for any ignition cycle in the set, the ignition sequence of each cylinder of the engine is determined, and an ignition mark signal of each cylinder is generated.
Since the engine is in more than one ignition cycle under the idle working condition, the ignition sequence of each cylinder of the engine is determined for any one ignition cycle, namely, the cylinders which need ignition combustion and the cylinders which do not perform ignition combustion are determined. And generating an ignition mark signal corresponding to each cylinder according to the ignition sequence of the engine to indicate that the cylinder is ignited or not ignited.
Specifically, for any one ignition cycle, the activation proportion corresponding to the ignition cycle, that is, the ratio of the number of cylinders required to be ignited and combusted by the engine to the total number of cylinders, may be determined first. For example, the engine may be represented as C1, C2, C3, C4, C5, and C6 for 6 ignition cycles during this idle condition, each corresponding to an activation ratio, and the activation ratios for different ignition cycles may be the same or different.
Taking a six-cylinder engine as an example, under normal working conditions, 6 cylinders of the engine all need ignition combustion to do work, and the ignition sequence of each cylinder is generally 1-5-3-6-2-4. In this embodiment, for any firing cycle of the engine, a corresponding activation ratio is determined. For example, in this ignition cycle, the engine is activated in a proportion of 4/6, i.e., 4 cylinders require ignition combustion and 2 cylinders do not.
One possible implementation manner is to determine which cylinders are ignited and burned and which cylinders are not ignited and burned in a specific activation proportion, wherein the ignition sequence determined according to the activation proportion can be calibrated in advance through experiments, and which ignition sequence meets the thermal efficiency requirement of the engine through experiments in advance.
For example, when the engine is activated in a 4/6 ratio, the corresponding firing order may be only 5-3-2-4 or 1-3-6-4, i.e., the corresponding firing order may be such that the engine achieves higher thermal efficiency only when 1 cylinder and 6 cylinder are not firing or 5 cylinder and 2 cylinder are not firing.
After determining the firing order of each cylinder, a corresponding firing flag signal is generated. For example, the firing order of the engine is 5-3-2-4, then the 1-cylinder and 6-cylinder fire flag signals are non-firing, and the 5-cylinder, 3-cylinder, 2-cylinder and 4-cylinder fire flag signals are firing.
In addition, in this embodiment, an ignition flag bit of the cylinder may be set to indicate an ignition flag signal of the cylinder. When the ignition flag bit of the cylinder is 0, the cylinder is indicated to be in non-ignition combustion; when the ignition flag bit of the cylinder is 1, the ignition flag bit indicates that the cylinder needs ignition combustion. For example, when the firing order of the engine is 5-3-2-4, the generated firing indicator signal for each cylinder is: the ignition zone bit of the 1 cylinder and the 6 cylinder is 0, and the ignition zone bit of the 5 cylinder, the 3 cylinder, the 2 cylinder and the 4 cylinder is 1.
It should be noted that, the manner of generating the ignition flag signal provided in the above embodiment is only an exemplary implementation, and is not limited to the above implementation.
S103: for any cylinder, an ignition control signal is generated according to an ignition sign signal of the cylinder, so that the engine performs corresponding operation according to the ignition control signal.
Taking an example that the ignition sequence of a six-cylinder engine is 5-3-2-4, wherein ignition mark signals corresponding to 1 cylinder and 6 cylinder are non-ignition, and generating ignition control signals corresponding to non-ignition of the cylinders; and the ignition mark signals of the 5 cylinder, the 3 cylinder, the 2 cylinder and the 4 cylinder are used as ignition, and an ignition control signal corresponding to the ignition of the cylinder is generated.
In one possible implementation manner, for 5 cylinders, 3 cylinders, 2 cylinders or 4 cylinders, the ignition mark signal of the cylinder is ignition, and then the generated ignition control signal is normal opening and closing of an intake valve, fuel injection of a fuel injector and normal opening and closing of an exhaust valve.
Specifically, when the ignition mark of the cylinder is ignition, the engine controls the opening of the intake valve of the cylinder, and the piston moves from the top dead center to the bottom dead center along with the progress of the intake stroke. When the piston moves to the vicinity of the bottom dead center, the intake valve is closed, and the piston moves upward to compress the gas in the cylinder. When the compression stroke is about to end, the fuel injector injects fuel into the cylinder to ignite the gas in the cylinder. After the cylinder ignites and burns, the gas pushes the piston to move downwards fast and work is done outwards through the crank-link mechanism. When the power stroke is about to end, the exhaust valve is opened, the piston moves towards the upper dead center, the exhaust gas in the cylinder is discharged, and after the exhaust stroke is ended, the exhaust valve is closed.
In one possible implementation, for 1 cylinder or 6 cylinders, the ignition flag signal of the cylinder is not ignited, and the generated ignition control signal is fuel injection-free, the exhaust valve is closed, that is, fuel is not injected into the cylinder, and the exhaust valve is kept in a closed state.
When generating the ignition control command according to the ignition mark of each cylinder, one possible implementation manner is to determine the cylinder in the exhaust stroke according to the position of the crankshaft and the position of the camshaft, and generate the corresponding ignition control command according to the ignition mark of the cylinder in the exhaust stroke.
In a working cycle of a six-cylinder engine, a crankshaft confirms whether a next cylinder needs ignition combustion every 120 degrees, when the cylinder is in an exhaust stroke, the working process of the cylinder is proved to be about to end, and based on the working cycle, the embodiment of the application also provides a possible implementation manner, namely, firstly, an ignition sign signal of the cylinder in the exhaust stroke is judged, and a corresponding ignition control signal is generated according to the ignition sign signal of the cylinder. If the ignition flag signal of the cylinder is ignition, a corresponding control instruction may be generated. After the last exhaust stroke of the cylinder is finished, ignition combustion can be realized according to the newly generated ignition control signal, and the waiting time of the engine is reduced.
Since the engine may have more than one corresponding ignition cycle under idle conditions, when the engine has performed the corresponding ignition sequence for the first ignition cycle, the next ignition cycle is continued, i.e., the next ignition sequence is performed, until all the ignition cycles are performed or the idle conditions of the engine change.
According to the control method of the engine, which is provided by the embodiment of the application, aiming at the idle working condition of the engine, the ignition sequences corresponding to different ignition cycles are determined, and only part of cylinders are controlled to ignite and burn, so that the cylinders are fully burned as much as possible, and the thermal efficiency of the engine is improved.
The principle of operation of the engine under idle conditions will be described in connection with a specific scenario.
In this application scenario, the engine has 6 cylinders, and first, according to the rotational speed and torque of the engine, a set of ignition cycles corresponding to the engine, and an activation proportion corresponding to each ignition cycle are determined. And determining the ignition sequence of each cylinder under the ignition cycle according to the activation proportion, and generating a corresponding ignition mark signal.
Referring to Table 1, the engine has a total of 5 ignition cycles in the set of ignition cycles at idle, the ignition cycle designations being indicated by C1, C2, C3, C4 and C5, respectively, and the ignition cycle corresponding ignition sequence designations being indicated by F1, F2, F3, F4 and F5, respectively.
In the table, an ignition flag bit is used to indicate an ignition flag signal, and an ignition flag bit of 1 indicates that the cylinder is ignited and burned, and an ignition flag bit of 0 indicates that the cylinder is not ignited and burned.
TABLE 1 ignition sequence set
For example, in the first firing cycle C1, the corresponding activation ratio is 4/6, and the firing order F1 for each cylinder is 1-3-6-4, i.e., 1 cylinder, 3 cylinder, 6 cylinder, and 4 cylinder firing, 2 cylinder, and 5 cylinder non-firing.
Based on the above embodiments, the present application further provides a control method of an engine. Referring to fig. 2, a flowchart of a control method of an engine according to an embodiment of the present application is provided.
The method specifically comprises the following steps:
one possible implementation may set the control method of the engine in the idle condition to an idle control mode in advance, and the engine executes the idle control mode when the rotation speed and torque of the engine satisfy a preset range of the idle condition.
S201: determining the rotating speed and the required torque of an engine;
s202: judging whether the rotating speed and the required torque are in a preset range of an idle working condition or not;
s203: if yes, initializing an idle speed control mode;
s204: controlling the engine to execute the idle speed control method;
according to the current rotating speed and the required torque of the engine, the ignition cycle of the engine and the ignition sequence corresponding to the ignition cycle are determined, and the engine sequentially executes the ignition sequence.
S205: judging whether the rotating speed and the required torque of the engine are still within a preset range of idle working conditions;
and after the engine executes each ignition sequence, judging whether the rotating speed and the required torque of the engine are still in the preset range of the idle working condition.
S206: if yes, continuing to execute the idle speed control method; otherwise, the idle speed control mode is exited, and the engine is controlled to execute a preset control method. According to the control method of the engine, when the engine is in the idle working condition, the engine is controlled to execute a plurality of ignition cycles, each ignition cycle corresponds to a specific ignition sequence, ignition combustion of part of cylinders is controlled, other cylinders are not ignited, and the thermal efficiency of the engine is improved.
Based on the engine control method provided by the above method embodiment, the present application embodiment further provides an engine control system, and the working principle of the system will be described below with reference to the accompanying drawings.
Referring to fig. 3, a schematic diagram of a control system of an engine according to an embodiment of the present application is provided.
The control system 300 includes: a preprocessing unit 301, a basic control unit 302, and an ignition processing unit 303.
The preprocessing unit 301 is configured to acquire a signal of an engine sensor, and send the signal to the basic control unit 302 after preprocessing the signal.
Specifically, the preprocessing unit 301 may acquire signals acquired by a crank sensor, a cam shaft sensor, and an accelerator pedal position sensor, and transmit the acquired signals to the base control unit 302 after preprocessing.
The basic control unit 302 is configured to determine the number of ignition cycles of the engine based on the preprocessed signal.
The basic control unit 302 calculates the current rotational speed of the engine according to the crank sensor signal and the cam shaft sensor signal sent by the preprocessing unit 301. And searching a required torque table according to the signal of the accelerator pedal position sensor, and determining the current required torque of the engine. The base control unit 302 determines a set of ignition cycles of the engine based on the rotational speed and the requested torque of the engine. When the rotation speed or the required torque of the engine exceeds the preset range of the idle condition, the basic control unit 302 is further configured to control the engine to execute a preset control method, so that the engine can realize normal operation.
The ignition processing unit 303 is configured to determine an ignition sequence of each cylinder of the engine for any ignition cycle in the set, and generate an ignition flag signal for each cylinder.
In one possible implementation manner, for any ignition cycle, the ignition processing unit 303 determines an activation proportion of the engine, that is, a ratio of the number of cylinders required to be ignited and burned by the engine to the total number of cylinders, according to the rotation speed and the required torque of the engine, and determines an ignition sequence of each cylinder of the engine according to the activation proportion.
The basic control unit 302 is further configured to generate, for any cylinder, an ignition control signal according to an ignition flag signal of the cylinder, so that the engine performs a corresponding operation according to the ignition control signal.
In one possible implementation, the base control unit 302 generates a first control signal and a second control signal according to an ignition sign signal of a cylinder, where the first control signal is used to control operation of an injector, and the second control signal is used to control operation of an intake valve and an exhaust valve of the cylinder.
Specifically, when the ignition flag signal of the cylinder is ignition, the first control signal generated by the basic control unit 302 is that the intake valve and the exhaust valve are normally opened and closed, the second control signal is that fuel is injected, the first control signal controls the electromagnetic valve actuator of the intake valve and the exhaust valve of the cylinder to normally work, and the second control signal controls the fuel injector to inject fuel into the cylinder.
When the ignition flag signal of the cylinder is misfire, the first control signal generated by the base control unit 302 is that the intake valve and the exhaust valve remain closed, the second control signal is that fuel is not injected, the first control signal controls the intake valve and the exhaust valve of the cylinder to remain closed, and the second control signal controls the fuel injector not to inject fuel.
The beneficial effects of the engine control system provided in the embodiment of the present application refer to the above method example, and are not described herein again.
The principle of operation of the control system of the engine will be described in connection with another specific scenario.
Referring to fig. 4, a schematic diagram of a control system of another engine according to an embodiment of the present application is provided.
In the control system, an engine control unit 401, a crank sensor 402, a cam shaft sensor 403, an accelerator pedal position sensor 404, and an engine 405;
the engine control unit 401 includes: a preprocessing unit 406, a base control unit 407, and an idle speed control unit 408, wherein the idle speed control unit 408 includes: an ignition sequence calculating unit 409, an ignition flag calculating unit 410, and a valve control unit 411.
The engine control unit 401 receives signals collected by the crank sensor 402, the camshaft sensor 403, and the accelerator pedal position sensor 404, and preprocesses these signals by the preprocessing unit 406, and sends the preprocessed sensor signals to the base control unit 407 and the idle control unit 408.
In one possible implementation, the base control unit 407 may determine the rotational speed of the engine based on the signals collected by the crankshaft sensor 402 and the camshaft sensor 403, and may find a pre-calibrated required torque table based on the signal collected by the accelerator pedal position sensor 404 to determine the current required torque of the engine. An ignition cycle set of the engine is determined based on the rotational speed and torque of the engine.
The firing order calculation unit 409 is configured to determine, for any firing cycle in the set, a firing order corresponding to the firing cycle, generate a firing order signal, and send the firing order signal of each cylinder to the firing indicator calculation unit 410 and the valve control unit 411. The ignition flag calculating unit 410 generates an ignition flag signal according to the ignition sequence signal, and the valve control unit 411 generates a valve control signal according to the ignition sequence signal for controlling opening and closing of the intake valve and the exhaust valve.
The idle speed control unit 408 sends an ignition flag signal and a valve control signal to the base control unit 407, and the base control unit 407 controls the operation of the fuel injector of the engine 405 according to the ignition flag signal and drives the operation of the intake valve and the exhaust valve of each cylinder of the engine 405 according to the valve control signal.
The beneficial effects of the control system provided in the embodiment of the present application refer to the above method example, and are not described herein again.
Based on the method embodiment and the device embodiment, the embodiment of the application also provides an ignition control device of an engine, which comprises: a memory and a processor.
Referring to fig. 5, a schematic diagram of an ignition control apparatus of an engine according to an embodiment of the present application is provided.
The apparatus 500 includes: a memory 501 and a processor 502;
a memory 501 for storing associated program code;
and the processor 502 is used for calling the program codes and executing the ignition control method of the engine provided by the method embodiment.
In addition, the embodiment of the application also provides a computer readable storage medium for storing a computer program for executing the ignition control method of the engine provided by the embodiment of the method.
It should be noted that the terms "first" and "second" are used herein to distinguish similar objects from each other and are not used to describe a particular order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances and are merely illustrative of the manner in which the embodiments of the application described herein have been described for objects of the same nature.
In this specification, each embodiment is described in a progressive manner, and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for the device embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and relevant portions are provided with reference to the partial description of the method embodiments. The above-described apparatus embodiments are merely illustrative, in which units or modules illustrated as separate components may or may not be physically separate, and components shown as units or modules may or may not be physical modules, i.e. may be located in one place, or may be distributed over multiple network units, where some or all of the units or modules may be selected according to actual needs to achieve the purposes of the embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
The foregoing is illustrative of the present application and is not to be construed as limiting thereof in any way. Equivalent changes or modifications of the above embodiments are intended to be included within the scope of the present application.
Claims (9)
1. A control method of an engine, characterized by comprising:
determining an ignition cycle set of an engine based on an idle speed working condition of the engine, wherein the ignition cycle set comprises a plurality of ignition cycles used for controlling ignition combustion of partial cylinders of the engine, and the idle speed working condition of the engine has a corresponding relation with the ignition cycle set;
determining the ignition sequence of each cylinder of the engine for any ignition cycle in the set, and generating an ignition mark signal of each cylinder;
wherein the determining an ignition sequence of each cylinder of the engine for any ignition cycle in the set comprises: determining an activation proportion corresponding to an ignition cycle for any ignition cycle in the set, and determining the ignition sequence of each cylinder of the engine according to the activation proportion, wherein the activation proportion is the ratio of the number of cylinders subjected to ignition combustion to the total number of cylinders of the engine;
and generating an ignition control signal according to an ignition mark signal of any one of the cylinders, so that the engine executes corresponding operation according to the ignition control signal.
2. The method of claim 1, wherein generating an ignition control signal from an ignition flag signal for the cylinder comprises:
when the ignition mark signal of the cylinder is ignition, an ignition control signal for normally opening and closing the air inlet valve, injecting fuel oil by the fuel injector and normally opening and closing the air outlet valve is generated.
3. The method of claim 1, wherein generating an ignition control signal from an ignition flag signal for the cylinder comprises:
and when the ignition mark signal of the cylinder is non-ignition, generating an ignition control signal without fuel injection and with the exhaust valve closed.
4. The method of claim 1, wherein the determining the set of ignition cycles of the engine based on an idle condition of the engine comprises:
and determining an ignition cycle set of the engine based on the rotational speed of the engine and the required torque, wherein the rotational speed is less than or equal to a preset rotational speed, and the required torque is less than or equal to a preset required torque.
5. The method according to claim 4, wherein the method further comprises:
the engine executes a preset control method when at least one of the rotational speed greater than the preset rotational speed or the required torque greater than the preset required torque is satisfied.
6. A control system of an engine, the system comprising: the device comprises a preprocessing unit, a basic control unit and an ignition processing unit;
the preprocessing unit is used for acquiring signals of an engine sensor, preprocessing the signals and then sending the preprocessed signals to the basic control unit;
the basic control unit is used for determining an ignition cycle set of the engine based on the preprocessed signals, wherein the ignition cycle set comprises a plurality of ignition cycles used for controlling ignition combustion of partial cylinders of the engine, and the idling working condition of the engine has a corresponding relation with the ignition cycle set;
the ignition processing unit is used for determining the ignition sequence of each cylinder of the engine for any ignition cycle in the set and generating an ignition mark signal of each cylinder;
the ignition processing unit is specifically configured to determine, for any ignition cycle in the set, an activation proportion corresponding to the ignition cycle, and determine an ignition sequence of each cylinder of the engine according to the activation proportion, where the activation proportion is a ratio of a number of cylinders that are ignited and burned to a total number of cylinders of the engine;
the basic control unit is further used for generating an ignition control signal according to the ignition mark signal of any one of the cylinders so that the engine can execute corresponding operation according to the ignition control signal.
7. The system according to claim 6, wherein the basic control unit is specifically configured to generate, for any cylinder, a first control signal and a second control signal according to an ignition sign signal of the cylinder, where the first control signal is used to control operation of an injector, and the second control signal is used to control operation of intake valves and exhaust valves of the cylinder.
8. The system according to claim 6, wherein the preprocessing unit is specifically configured to acquire a signal of a crank sensor, a signal of a cam shaft sensor, and a signal of an accelerator pedal position sensor, and to preprocessing the signals and send the signals to the basic control unit.
9. A control apparatus of an engine, characterized by comprising: a memory and a processor;
the memory is used for storing related program codes;
the processor being operative to invoke the program code to perform the method of any of claims 1 to 5.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5425335A (en) * | 1991-12-26 | 1995-06-20 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Automobile engine |
| US5584266A (en) * | 1994-10-18 | 1996-12-17 | Sanshin Kogyo Kabushiki Kaisha | Fuel control for multi-cylinder engine |
| US5645032A (en) * | 1994-10-18 | 1997-07-08 | Sanshin Kogyo Kabushiki Kaisha | Engine control system |
| US5720257A (en) * | 1994-10-18 | 1998-02-24 | Yamaha Hatsudoki Kabushiki Kaisha | Multiple cylinder engine management system |
| WO2005019629A1 (en) * | 2003-08-26 | 2005-03-03 | Seong-Soo Kim | Starting control method of a car for reducing hc and harmful gas emissions |
| KR20150071977A (en) * | 2013-12-19 | 2015-06-29 | 현대오트론 주식회사 | Method and apparatus for controlling cylinder deactivation of engine |
| DE102017112565A1 (en) * | 2016-06-09 | 2017-12-14 | Ford Global Technologies, Llc | SYSTEM FOR RESETTING THE DISCONNECTED CYLINDER |
| CN108049977A (en) * | 2013-03-15 | 2018-05-18 | 图拉技术公司 | In the case that with the engine diagnostic for skipping ignition control |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6951203B2 (en) * | 2003-06-05 | 2005-10-04 | Arctic Cat Inc. | Ignition timing control system |
| US8887692B2 (en) * | 2011-02-14 | 2014-11-18 | GM Global Technology Operations LLC | Systems and methods for decreasing torque fluctuations during cylinder deactivation and reactivation |
| US9441551B2 (en) * | 2014-07-29 | 2016-09-13 | Ford Global Technologies, Llc | Method for a variable displacement engine |
| US10465620B2 (en) * | 2014-11-24 | 2019-11-05 | Ford Global Technologies, Llc | Systems and methods for LP-EGR delivery in a variable displacement engine |
| US10107217B2 (en) * | 2016-06-09 | 2018-10-23 | Ford Global Technologies, Llc | System and method for determining engine knock |
| US10823093B2 (en) * | 2019-03-26 | 2020-11-03 | Ford Global Technologies, Llc | Method and system for variable displacement engines |
-
2021
- 2021-12-14 CN CN202111529032.7A patent/CN114233497B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5425335A (en) * | 1991-12-26 | 1995-06-20 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Automobile engine |
| US5584266A (en) * | 1994-10-18 | 1996-12-17 | Sanshin Kogyo Kabushiki Kaisha | Fuel control for multi-cylinder engine |
| US5645032A (en) * | 1994-10-18 | 1997-07-08 | Sanshin Kogyo Kabushiki Kaisha | Engine control system |
| US5720257A (en) * | 1994-10-18 | 1998-02-24 | Yamaha Hatsudoki Kabushiki Kaisha | Multiple cylinder engine management system |
| WO2005019629A1 (en) * | 2003-08-26 | 2005-03-03 | Seong-Soo Kim | Starting control method of a car for reducing hc and harmful gas emissions |
| CN108049977A (en) * | 2013-03-15 | 2018-05-18 | 图拉技术公司 | In the case that with the engine diagnostic for skipping ignition control |
| KR20150071977A (en) * | 2013-12-19 | 2015-06-29 | 현대오트론 주식회사 | Method and apparatus for controlling cylinder deactivation of engine |
| DE102017112565A1 (en) * | 2016-06-09 | 2017-12-14 | Ford Global Technologies, Llc | SYSTEM FOR RESETTING THE DISCONNECTED CYLINDER |
Non-Patent Citations (1)
| Title |
|---|
| 电控汽油机起动及暖机工况燃烧状况的分析统计;程勇, 王建昕, 庄人隽, 杨涛, 吴波, 张立梅;内燃机学报(01);第62-66页 * |
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