CN115839278B - Working method and device for dynamic cylinder deactivation of engine - Google Patents
Working method and device for dynamic cylinder deactivation of engine Download PDFInfo
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- CN115839278B CN115839278B CN202310098253.6A CN202310098253A CN115839278B CN 115839278 B CN115839278 B CN 115839278B CN 202310098253 A CN202310098253 A CN 202310098253A CN 115839278 B CN115839278 B CN 115839278B
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Abstract
The application provides a working method and device for dynamic cylinder deactivation of an engine, which are applied to the technical field of engine control. Determining a cylinder deactivation working condition area in which the obtained working condition point is located; determining a target cylinder deactivation number of the engine according to the cylinder deactivation operating condition area; determining a target balanced large cycle type according to the target cylinder deactivation number, and determining the running state of the engine as the target balanced large cycle type; if the working condition point is updated, determining an updated cylinder deactivation working condition area, a target cylinder deactivation number and a target large balance cycle type, and switching the target large balance cycle type into the updated large balance cycle type. The engine running state of the balanced large-cycle type is provided, so that the engine runs under the balanced large-cycle type of the target corresponding to the number of the cylinder deactivation, the switching stability of the balanced large-cycle type can be ensured, the structural reliability and NVH performance of the engine in the cylinder deactivation state or in the state switching process are improved, and the engine is in a stable state.
Description
Technical Field
The application relates to the technical field of engine control, in particular to a working method and device for dynamic cylinder deactivation of an engine.
Background
The vehicle engine is an important component of the normal operation of the vehicle. The fuel consumption rate of the engine under the low-load working condition is high, and the exhaust temperature is low. Too low an exhaust temperature results in a low conversion efficiency of the exhaust aftertreatment system, which in turn results in poor emissions performance of the engine. The dynamic cylinder deactivation technology can improve the oil consumption and the emission of the engine under the low-load working condition, but the control and the mechanism of the dynamic cylinder deactivation are difficult to realize, and the NVH (Noise, vibration, harshness, vibration, noise and smoothness) and the reliability of the engine are deteriorated. Currently, the TULA company's dynamic skip fire (Dynamic Skip Fire, DSF) technique is one of the dynamic cylinder deactivation techniques.
Disclosure of Invention
In view of this, the embodiments of the present application provide a working method and apparatus for dynamic cylinder deactivation of an engine, so that the engine can obtain fuel consumption and exhaust temperature benefits of cylinder deactivation technology, and meanwhile, can improve operational stability and structural reliability in a cylinder deactivation state. In order to achieve the above object, the technical scheme provided in the present application is as follows:
in a first aspect, the present application provides a method of operating an engine for dynamic cylinder deactivation, the method comprising:
determining a cylinder deactivation operating condition area where an operating condition point is located in response to acquiring the operating condition point of an engine;
determining a target cylinder deactivation number of the engine according to the cylinder deactivation operating condition zone;
determining a target balanced large cycle type of the engine according to the target cylinder deactivation number, and determining the running state of the engine as the target balanced large cycle type, wherein the target balanced large cycle type is a state that the number of ignition cylinders in each small cycle of the engine is the same and the loads of all cylinders in the whole large cycle are balanced;
if the working condition point of the engine is updated, determining a cylinder deactivation working condition area in which the updated working condition point is positioned, and determining the updated target cylinder deactivation number;
and switching the target equalizing large cycle type into the updated target equalizing large cycle type in response to determining the updated target equalizing large cycle type corresponding to the updated target cylinder deactivation number.
In one possible implementation manner, the switching the target equalization large loop type to the updated target equalization large loop type includes:
acquiring a target switching opportunity of an equilibrium large-cycle type, wherein the target switching opportunity comprises a target switching outlet and a target switching inlet;
and switching the target balanced large-cycle type into the updated target balanced large-cycle type based on the target switching outlet and the target switching inlet.
In one possible implementation manner, the acquiring the target switching opportunity of the balanced large loop type includes:
and calculating and determining the target switching time of the balanced large-cycle type in a dynamic simulation mode.
In one possible implementation, the determining the target balanced large cycle type of the engine according to the target cylinder deactivation number includes:
and determining a target balanced large cycle type corresponding to the target cylinder deactivation number according to the corresponding relation between the cylinder deactivation number and the balanced large cycle type.
In one possible implementation, the method further includes:
and determining the oil injection quantity of the engine according to the target balanced large cycle type.
In a second aspect, the present application provides an engine dynamic cylinder deactivation work device, the device comprising:
the first determining module is used for determining a cylinder deactivation working condition area where the working condition point is located in response to acquiring the working condition point of the engine;
a second determination module for determining a target cylinder deactivation number of the engine based on the cylinder deactivation operating condition region;
the third determining module is used for determining a target balanced large cycle type of the engine according to the target cylinder deactivation number, determining the running state of the engine as the target balanced large cycle type, wherein the target balanced large cycle type is a state that the number of ignition cylinders in each small cycle of the engine is the same and the loads of all cylinders in the whole large cycle are balanced;
a fourth determining module, configured to determine a cylinder deactivation operating condition area in which the updated operating condition point is located if the operating condition point of the engine is updated, and determine an updated target cylinder deactivation number;
and the switching module is used for switching the target balanced large cycle type into the updated target balanced large cycle type in response to determining the updated target balanced large cycle type corresponding to the updated target cylinder deactivation number.
In one possible implementation manner, the switching module is configured to switch the target equalization large loop type to the updated target equalization large loop type, and includes:
the system comprises an acquisition sub-module, a control sub-module and a control sub-module, wherein the acquisition sub-module is used for acquiring a target switching opportunity of an equilibrium large-cycle type, and the target switching opportunity comprises a target switching outlet and a target switching inlet;
and the switching sub-module is used for switching the target balanced large-cycle type into the updated target balanced large-cycle type based on the target switching outlet and the target switching inlet.
In one possible implementation manner, the acquiring submodule specifically includes:
and calculating and determining the target switching time of the balanced large-cycle type in a dynamic simulation mode.
In one possible implementation, the third determining module is configured to determine a target balanced large cycle type of the engine according to the target cylinder deactivation number, including:
and determining a target balanced large cycle type corresponding to the target cylinder deactivation number according to the corresponding relation between the cylinder deactivation number and the balanced large cycle type.
In one possible implementation, the apparatus further includes:
and a fifth determining module, configured to determine an oil injection amount of the engine according to the target balanced large cycle type.
In a third aspect, the present application provides an engine dynamic cylinder deactivation work apparatus comprising: a processor, memory, system bus;
the processor and the memory are connected through the system bus;
the memory is configured to store one or more programs, the one or more programs comprising instructions, which when executed by the processor, cause the processor to perform the method of dynamically deactivating an engine according to the first aspect described above.
In a fourth aspect, the present application provides a computer readable storage medium, where instructions are stored, when the instructions are executed on a terminal device, cause the terminal device to execute the working method for dynamic cylinder deactivation of an engine according to the first aspect.
In a fifth aspect, the present application provides a vehicle comprising a working device for dynamic cylinder deactivation of an engine according to the third aspect.
From this, this application has following beneficial effect:
the application provides a working method and a device for dynamic cylinder deactivation of an engine, wherein a cylinder deactivation working condition area where a working condition point is located is determined in response to obtaining the working condition point of the engine; determining a target cylinder deactivation number of the engine according to the cylinder deactivation operating condition zone; determining a target balanced large cycle type of the engine according to the target cylinder deactivation number, and determining the running state of the engine as the target balanced large cycle type, wherein the target balanced large cycle type is a state that the number of ignition cylinders in each small cycle of the engine is the same and the loads of all cylinders in the whole large cycle are balanced; if the working condition point of the engine is updated, determining a cylinder deactivation working condition area where the updated working condition point is located according to the determination, and determining the updated target cylinder deactivation number; and switching the target equalizing large cycle type into the updated target equalizing large cycle type in response to determining the updated target equalizing large cycle type corresponding to the updated target cylinder deactivation number. The engine running state of the balanced large-cycle type is provided, so that the engine runs under the balanced large-cycle type of the target corresponding to the number of the deactivated cylinders, and the switching stability of the balanced large-cycle type can be ensured.
Drawings
FIG. 1 is a flow chart of a method for dynamically deactivating an engine according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a correspondence relationship between rotational speed and torque of a six-cylinder engine, a cylinder deactivation operating condition area, and a cylinder deactivation number according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a six-cylinder engine according to an embodiment of the present disclosure in a same balanced large cycle;
FIG. 4 is a schematic diagram of a switching outlet and a switching inlet of a six-cylinder engine provided in an embodiment of the present application on a globally optimal dynamic cylinder deactivation path, where the switching outlet and the switching inlet are used for equalizing a large circulation matrix and equalizing a large circulation type of each working condition area;
FIG. 5a is a directed graph of switching between relatively optimal large cycles for different numbers of cylinder deactivation for a six-cylinder machine according to an embodiment of the present disclosure;
FIG. 5b is an undirected graph of switching between relatively optimal and balanced large cycles for different numbers of cylinder deactivation for a six-cylinder machine provided in an embodiment of the present application;
FIG. 5c is a diagram illustrating an undirected graph of working cylinder numbers from 3 to 6 according to an embodiment of the present application;
fig. 6 is a block diagram of a working device for dynamic cylinder deactivation of an engine according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In this application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
DSF technology developed by the TULA company enables the engine to operate in a corresponding firing fraction pattern in each operating region. However, in some DSF firing fraction modes, the firing times of the cylinders are not completely equal in each small cycle, and the loads of the cylinders are unbalanced; in some DSF ignition fraction modes, there are also cases where some cylinders are not always ignited, there is a risk of engine oil suck-back due to negative pressure generated in the cylinders by cylinder air leakage, and after a few small cycles, air supplementing operation is required to be performed on the cylinders; there is also a DSF firing fraction pattern with an unequal number of firing cylinders per small cycle. The method is not easy to ensure in the aspects of the running stability of the engine and the reliability of the engine structure.
Based on the above, the embodiment of the application provides a working method and a device for dynamic cylinder deactivation of an engine, and the working condition area of the cylinder deactivation of the working condition point is determined in response to the acquisition of the working condition point of the engine; determining a target cylinder deactivation number of the engine according to the cylinder deactivation operating condition zone; determining a target balanced large cycle type of the engine according to the target cylinder deactivation number, and determining the running state of the engine as the target balanced large cycle type, wherein the target balanced large cycle type is a state that the number of ignition cylinders in each small cycle of the engine is the same and the loads of all cylinders in the whole large cycle are balanced; if the working condition point of the engine is updated, determining a cylinder deactivation working condition area in which the updated working condition point is positioned, and determining the updated target cylinder deactivation number; and switching the target equalizing large cycle type into the updated target equalizing large cycle type in response to determining the updated target equalizing large cycle type corresponding to the updated target cylinder deactivation number. The engine running state of the balanced large-cycle type is provided, so that the engine runs under the balanced large-cycle type of the target corresponding to the number of the deactivated cylinders, and the switching stability of the balanced large-cycle type can be ensured.
In order to facilitate understanding of the technical scheme provided by the embodiments of the present application, the working method and device for dynamic cylinder deactivation of an engine provided by the embodiments of the present application are described below with reference to the accompanying drawings.
Fig. 1 is a flow chart of a working method of dynamic cylinder deactivation of an engine according to an embodiment of the present application, referring to fig. 1, the method specifically includes the following steps S101 to S105:
s101: in response to acquiring an operating condition point of an engine, a cylinder deactivation operating condition zone in which the operating condition point is located is determined.
In this embodiment of the present application, the working condition point may be any point of the engine speed gear, and according to the working condition point, the speed and torque of the engine may be obtained. The cylinder deactivation working condition area is in a cylinder deactivation dominant working condition area, and the running state of the engine is the balanced large cycle type corresponding to the working condition area.
Referring to fig. 2, fig. 2 is a schematic diagram of a correspondence relationship between rotational speed and torque of a six-cylinder engine, a cylinder deactivation operation condition area, and a cylinder deactivation number provided in an embodiment of the present application. The dominant operating condition zone for each cylinder deactivation number may be determined by simulation calculations or performance tests, with the dominant operating condition zone for cylinder deactivation number being indicated only later. The cylinder deactivation operating condition area in which the operating condition point is located can be determined based on the rotational speed and the torque.
And determining the optimal number of working cylinders of each working condition point in the external characteristic range of the engine by means of simulation calculation or performance test. The area formed by the working condition points with the same number of the optimal working cylinders is the cylinder deactivation dominant working condition area with the corresponding number of the working cylinders. Factors considered in simulation and experimentation may include exhaust temperature, fuel consumption, and protection limits for the supercharger. In each obtained working condition area, if the engine works according to the corresponding number of cylinders, the optimal oil consumption and exhaust temperature can be obtained, the supercharger cannot surge, and the engine can run stably. The operating condition point is a point for representing the main operating state of the engine, and is a point determined by the horizontal coordinate and the vertical coordinate of the engine speed and the output torque. The working condition point of the engine can be acquired in real time through a sensor or can be acquired from a database, and the embodiment of the application is not limited to a specific form of the acquisition mode and can be selected according to actual requirements.
S102: a target number of cylinder deactivation of the engine is determined based on the cylinder deactivation operating condition region.
After determining the cylinder deactivation operating condition region in which the operating condition point is located, a target cylinder deactivation number of the engine may be determined based on what is shown in FIG. 2. At each cylinder deactivation number, the equalization large cycle type corresponding to the target cylinder deactivation number may be optimized by dynamic calculation. The dynamic cylinder deactivation technology of the engine based on the balanced large cycle needs to screen the balanced large cycle with better dynamic response from a large number of balanced large cycles so as to provide candidates for finally determining the dynamic cylinder deactivation scheme. The balanced large cycle of the engine can be rapidly screened by calculating in a steady state dynamics simulation mode. The method specifically comprises the following steps: determining reference torque of each balanced large cycle in dynamic simulation according to the number of working cylinders; the cylinder pressure of the ignition cylinder in each balanced large cycle is adjusted to ensure that the average output torque of each balanced large cycle is equal to the corresponding reference torque; and carrying out steady-state dynamics calculation on each large balance cycle according to the same rotating speed to obtain steady-state dynamics response of each large balance cycle, and screening large balance cycles with better dynamics response under the number of each working cylinder according to the steady-state dynamics response.
S103: and determining a target balanced large cycle type of the engine according to the target cylinder deactivation number, and determining the running state of the engine as the target balanced large cycle type, wherein the target balanced large cycle type is a state that the number of ignition cylinders in each small cycle of the engine is the same and the loads of all cylinders in the whole large cycle are balanced.
It should be noted that, the engine small cycle is generally regarded as one small cycle per 720 degrees of crankshaft rotation of the four-stroke piston reciprocating engine; a large cycle refers to an engine duty cycle that is comprised of at least one small cycle.
The large cycles may be represented by a matrix, one matrix representing a large cycle, each row of the matrix representing a small cycle, each column of the matrix corresponding to one cylinder of the engine. The value of each element of the matrix may be 1 or 0, respectively, representing whether the corresponding cylinder fires normally in the corresponding small cycle. The element value is 1, which means that the cylinder can fire normally in a corresponding small cycle; an element value of 0 indicates that the cylinder is not properly fired in a corresponding small cycle.
Equalizing the large cycles refers to the large cycles meeting a preset condition that the number of cylinders that fire normally in each small cycle in the large cycles is the same; in one large cycle, the firing times of each cylinder are equal, that is, the firing cylinder loads are the same. In the balanced large-cycle representation matrix, the sum of values of each row is equal, and the sum of values of each column is also equal. Wherein the sum of the values of each row represents the number of firing cylinders in each small cycle, and the sum of the values of each column represents the number of firings of the firing cylinders in one large cycle.
In one possible implementation, the determining the target balanced large cycle type of the engine according to the target cylinder deactivation number includes: and determining a target balanced large cycle type corresponding to the target cylinder deactivation number according to the corresponding relation between the cylinder deactivation number and the balanced large cycle type.
The corresponding relation between the cylinder deactivation number and the balanced large cycle type can be obtained through calculation in a dynamic simulation mode, the obtaining mode of the corresponding relation is not limited in the embodiment of the application, and the obtaining mode can be selected according to actual conditions.
Referring to fig. 3, fig. 3 is a schematic diagram of a six-cylinder engine according to an embodiment of the present application in the form of a matrix with the same balanced large cycle, and is composed of three small cycles, where the sum of values in each row is equal and the sum of values in each column is also equal.
When the engine runs in a balanced large-cycle type, the load of each cylinder is balanced, the condition that the working load of each cylinder is obviously higher than that of other cylinders is avoided, and according to the wooden barrel principle, the balanced large-cycle can enable the engine to have a longer service life in a cylinder-stopping working state. The cylinder deactivation numbers of all small cycles in the same balanced large cycle are equal, and when the engine repeats the same balanced large cycle, the cylinder deactivation numbers of all small cycles are kept the same, so that the stable operation of the engine is realized.
S104: and if the updated working condition point of the engine is updated, determining a cylinder deactivation working condition area where the updated working condition point is located, and determining the updated target cylinder deactivation number.
After the operating condition point update is determined, the updated operating condition point is determined to be in the cylinder deactivation operating condition area, and the updated cylinder deactivation number can be determined according to the content shown in fig. 2. Under each cylinder deactivation number, the equilibrium large cycle type corresponding to the updated cylinder deactivation number can be selected through dynamic calculation.
S105: and switching the target equalizing large cycle type into the updated target equalizing large cycle type in response to determining the updated target equalizing large cycle type corresponding to the updated target cylinder deactivation number.
In one possible implementation manner, the switching the target equalization large loop type to the updated target equalization large loop type includes: acquiring a target switching opportunity of an equilibrium large-cycle type, wherein the target switching opportunity comprises a target switching outlet and a target switching inlet; and switching the target balanced large-cycle type into the updated target balanced large-cycle type based on the target switching outlet and the target switching inlet.
And determining a globally optimal dynamic cylinder deactivation path through a shortest path algorithm of the network diagram. Referring to fig. 4, fig. 4 is a schematic diagram of a switching outlet and a switching inlet of a balanced large cycle matrix and a balanced large cycle type of each working condition area on a globally optimal dynamic cylinder deactivation path of the six-cylinder engine according to an embodiment of the present application. In one possible implementation manner, the target switching time of the balanced large-cycle type is calculated and determined through a dynamic simulation manner, the target switching time comprises a target switching outlet and a target switching inlet, and the balanced large-cycle type is switched according to the target switching outlet and the target switching inlet.
An engine dynamic cylinder deactivation technology based on balanced large circulation relates to the switching among a large number of balanced large circulation. The number of working cylinders is different by 1, and the average output torque is close. If the two equalizing macrocycles have r_1 row and r_2 row respectively, there are r_1×r_2 switches between the two equalizing macrocycles. The dynamic response of all these switching processes needs to be calculated in a traversal to obtain the optimal switching of the dynamic response between the two balanced macrocycles where the switching may occur, providing the basis data for determining the final dynamic cylinder deactivation scheme. Specific: determining two balanced large cycles which are mutually switched and have the number of working cylinders different by 1, determining all switching modes for executing switching according to the number of lines of a balanced large cycle matrix, and determining reference torque of the two balanced large cycles in dynamic simulation according to the number of the working cylinders; the cylinder pressure of the ignition cylinder in the two balanced large cycles is regulated, so that the average output torque of the two balanced large cycles is equal to the corresponding reference torque; and respectively applying corresponding cylinder pressures to each cylinder, performing steady-state dynamics calculation of switching between the balanced large cycles, and correspondingly determining the optimal switching line between the two balanced large cycles according to the steady-state dynamics. The switching line is the target switching time.
The switching frequency between the balanced large cycles with different cylinder deactivation numbers is lower, and the difference value of the corresponding cylinder deactivation numbers of the two balanced large cycles which are mutually switched is 1, so that the disturbance influence caused by the switching of the cylinder deactivation numbers can be weakened maximally. When the cylinder deactivation working condition area is required to be switched, the engine is switched according to the switching outlet and the switching inlet of the corresponding balanced large circulation matrix, so that stable transient response is ensured. In an equilibrium large cycle in which the number of deactivated cylinders is not zero and the total number of cylinders is not, each cylinder has a deactivated state and a working state, the number of small cycles contained in the equilibrium large cycle is usually not too large, and the air supplementing operation of the cylinders is not needed. It should be noted that the embodiment of the application is not only applied to six-cylinder engines, but also can calculate and calibrate the corresponding relation between the working condition areas of the number of cylinder deactivation and the balanced large circulation according to the configuration information of each engine model, and can obtain a matching scheme aiming at each model, so that the reliability and the stability of the engines are further ensured on the basis that different engines can save oil and reduce emission.
In one possible implementation, after determining the target switch opportunity, it is necessary to further determine the optimal path of the engine at the time of switching of the different numbers of cylinder deactivation.
The preferred equalization large loops and the switching between them can be described by a directed graph model. Referring to fig. 5a, fig. 5a is a directed graph representation of a preferred balanced large cycle-to-cycle switching for different numbers of cylinder deactivation of a six-cylinder machine according to an embodiment of the present application. In the figure, each black dot corresponds to an equilibrium large cycle, the numbers beside them represent the number of working cylinders of the corresponding equilibrium large cycle, and the curve of each arrow represents the switching from the equilibrium large cycle at its head point to the equilibrium large cycle at its tail point. The cost of the switch is represented by the color of the curve, with the specific value corresponding to the colored bar on the right side of the graph. In order to make the control strategy as simple as possible and to facilitate the computation of the global optimal switch, it is necessary to convert the directed graph into an undirected graph. See fig. 5b. Fig. 5b is an undirected graph representation of the switching between the relatively optimal balanced large cycles for different numbers of cylinder deactivation for a six-cylinder machine according to an embodiment of the present application. The conversion from the directed graph to the undirected graph specifically comprises: the two directed edges connecting the two vertices in fig. 5a are merged into one undirected edge connecting the two vertices in fig. 5b. The length of the combined edges can be the sum or the maximum value of the lengths of the two edges before combination, and other reasonable combination rules can be adopted according to the concerned indexes. The length of the directed edge before merging should be weighted according to the frequency or importance of each level of switching.
Using the shortest path search algorithm of the graph, one shortest path from the vertex with the number of working cylinders 0 to the vertex with the number of working cylinders 6 in fig. 5b can be obtained. The equalization large cycle corresponding to each vertex on the path is the equalization large cycle which is selected under each working cylinder number in the final cylinder deactivation strategy.
In practice, not all working cylinder numbers are necessarily involved. As an example, referring to fig. 5c, fig. 5c is a graph of an undirected graph of the number of working cylinders from 3 to 6 provided in an embodiment of the present application. There is a shortest path from the vertex with 3 working cylinders to the vertex with 6 working cylinders, and the shortest one of these paths can be selected as the final cylinder deactivation switching scheme.
In one possible implementation, the method further includes: and determining the oil injection quantity of the engine according to the target balanced large cycle type.
The oil injection quantity of the corresponding balanced large cycle at each working condition point in the working condition area of the cylinder deactivation number can be determined through a calibration experiment.
The embodiment of the application provides a working method and device for dynamic cylinder deactivation of an engine, which are used for determining a cylinder deactivation working condition area where working condition points of the engine are located in response to the acquisition of the working condition points of the engine; determining a target cylinder deactivation number of the engine according to the cylinder deactivation operating condition zone; determining a target balanced large cycle type of the engine according to the target cylinder deactivation number, and determining the running state of the engine as the target balanced large cycle type, wherein the target balanced large cycle type is a state that the number of ignition cylinders in each small cycle of the engine is the same and the loads of all cylinders in the whole large cycle are balanced; if the working condition point of the engine is updated, determining a cylinder deactivation working condition area in which the updated working condition point is positioned, and determining the updated target cylinder deactivation number; and switching the target equalizing large cycle type into the updated target equalizing large cycle type in response to determining the updated target equalizing large cycle type corresponding to the updated target cylinder deactivation number. The engine running state of the balanced large-cycle type is provided, so that the engine runs under the balanced large-cycle type of the target corresponding to the number of the deactivated cylinders, and the switching stability of the balanced large-cycle type can be ensured.
The foregoing embodiments of the present application provide a working method based on the foregoing dynamic cylinder deactivation of an engine. Next, a description will be given of a working device for dynamic cylinder deactivation of an engine, which is provided in an embodiment of the present application and performs the method shown in fig. 1, and next, description will be given of a function of the working device for dynamic cylinder deactivation of an engine, where a block diagram of the working device for dynamic cylinder deactivation of an engine is shown in fig. 6, and includes: a first determining module 601, a second determining module 602, a third determining module 603, a fourth determining module 604 and a switching module 605.
A first determining module 601, configured to determine a cylinder deactivation operating condition area where an operating condition point of an engine is located in response to acquiring the operating condition point;
a second determination module 602 for determining a target number of cylinder deactivation of the engine based on the cylinder deactivation operating condition region;
a third determining module 603, configured to determine a target balanced large cycle type of the engine according to the target cylinder deactivation number, and determine an operation state of the engine as the target balanced large cycle type, where the target balanced large cycle type is a state in which the number of firing cylinders in each small cycle of the engine is the same and loads of the cylinders in the whole large cycle are balanced;
a fourth determining module 604, configured to determine a cylinder deactivation operating condition area in which the updated operating condition point is located and determine an updated target cylinder deactivation number if the operating condition point of the engine is updated;
and a switching module 605, configured to switch the target equalization large cycle type to the updated target equalization large cycle type in response to determining the updated target equalization large cycle type corresponding to the updated target cylinder deactivation number.
In one possible implementation manner, the switching module 605 is configured to switch the target equalization large loop type to the updated target equalization large loop type, and includes:
the system comprises an acquisition sub-module, a control sub-module and a control sub-module, wherein the acquisition sub-module is used for acquiring a target switching opportunity of an equilibrium large-cycle type, and the target switching opportunity comprises a target switching outlet and a target switching inlet;
and the switching sub-module is used for switching the target balanced large-cycle type into the updated target balanced large-cycle type based on the target switching outlet and the target switching inlet.
In one possible implementation manner, the acquiring submodule specifically includes:
and calculating and determining the target switching time of the balanced large-cycle type in a dynamic simulation mode.
In one possible implementation, the third determining module 603 is configured to determine a target balanced large cycle type of the engine according to the target cylinder deactivation number, including:
and determining a target balanced large cycle type corresponding to the target cylinder deactivation number according to the corresponding relation between the cylinder deactivation number and the balanced large cycle type.
In one possible implementation, the apparatus further includes:
and a fifth determining module, configured to determine an oil injection amount of the engine according to the target balanced large cycle type.
The embodiment of the application provides a working device for dynamic cylinder deactivation of an engine, which comprises a first determining module, a second determining module, a third determining module, a fourth determining module and a switching module. The first determining module is used for determining a cylinder deactivation working condition area where the working condition point is located in response to acquiring the working condition point of the engine; a second determination module for determining a target cylinder deactivation number of the engine based on the cylinder deactivation operating condition region; the third determining module is used for determining a target balanced large cycle type of the engine according to the target cylinder deactivation number, determining the running state of the engine as the target balanced large cycle type, wherein the target balanced large cycle type is a state that the number of ignition cylinders in each small cycle of the engine is the same and the loads of all cylinders in the whole large cycle are balanced. The fourth determining module is used for determining a cylinder deactivation working condition area where the updated working condition point is located and determining the updated target cylinder deactivation number if the working condition point of the engine is updated; the switching module is used for switching the target equalization large circulation type into the updated target equalization large circulation type in response to determining the updated target equalization large circulation type corresponding to the updated target cylinder deactivation number. The engine running state of the balanced large-cycle type is provided, so that the engine runs under the balanced large-cycle type of the target corresponding to the number of the deactivated cylinders, and the switching stability of the balanced large-cycle type can be ensured.
Based on the working method of dynamic cylinder deactivation of the engine provided by the embodiment of the method, the embodiment of the application also provides working equipment of dynamic cylinder deactivation of the engine, which comprises the following steps: a processor, memory, system bus;
the processor and the memory are connected through the system bus;
the memory is configured to store one or more programs, the one or more programs comprising instructions, which when executed by the processor, cause the processor to perform the method of dynamically deactivating an engine as described in any of the embodiments above.
Based on the working method of engine dynamic cylinder deactivation provided by the above method embodiment, the embodiment of the application further provides a computer readable storage medium, in which an instruction is stored, and when the instruction runs on a terminal device, the terminal device is caused to execute the working method of engine dynamic cylinder deactivation described in any one of the above embodiments.
Based on the working method of the engine dynamic cylinder deactivation provided by the embodiment of the method, the embodiment of the application also provides a vehicle, and the vehicle comprises the working equipment of the engine dynamic cylinder deactivation.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for a system or system embodiment, since it is substantially similar to a method embodiment, the description is relatively simple, with reference to the description of the method embodiment being made in part. The systems and system embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A method of operating an engine for dynamic cylinder deactivation, the method comprising:
responding to the obtained working condition point of the engine, and determining a cylinder deactivation working condition area where the working condition point is positioned according to the rotating speed and the torque;
determining a target cylinder deactivation number of the engine according to the cylinder deactivation operating condition zone;
determining a target balanced large cycle type of the engine according to the target cylinder deactivation number, and determining the running state of the engine as the target balanced large cycle type, wherein the target balanced large cycle type is a state that the number of ignition cylinders in each small cycle of the engine is the same and the loads of all cylinders in the whole large cycle are balanced;
if the working condition point of the engine is updated, determining a cylinder deactivation working condition area in which the updated working condition point is positioned, and determining the updated target cylinder deactivation number;
switching the target equalizing large cycle type to the updated target equalizing large cycle type in response to determining the updated target equalizing large cycle type corresponding to the updated target cylinder deactivation number;
the determining the target balanced large cycle type of the engine according to the target cylinder deactivation number comprises the following steps:
and determining a target balanced large cycle type corresponding to the target cylinder deactivation number according to the corresponding relation between the cylinder deactivation number and the balanced large cycle type.
2. The method of claim 1, wherein the switching the target equalization large loop type to the updated target equalization large loop type comprises:
acquiring a target switching opportunity of an equilibrium large-cycle type, wherein the target switching opportunity comprises a target switching outlet and a target switching inlet;
and switching the target balanced large-cycle type into the updated target balanced large-cycle type based on the target switching outlet and the target switching inlet.
3. The method of claim 2, wherein the obtaining a target switch opportunity for the balanced large loop type comprises:
and calculating and determining the target switching time of the balanced large-cycle type in a dynamic simulation mode.
4. The method according to claim 1, wherein the method further comprises:
and determining the oil injection quantity of the engine according to the target balanced large cycle type.
5. A working device for dynamic cylinder deactivation of an engine, said device comprising:
the first determining module is used for determining a cylinder deactivation working condition area where the working condition point is located according to the rotating speed and the torque in response to the acquisition of the working condition point of the engine;
a second determination module for determining a target cylinder deactivation number of the engine based on the cylinder deactivation operating condition region;
the third determining module is used for determining a target balanced large cycle type of the engine according to the target cylinder deactivation number, determining the running state of the engine as the target balanced large cycle type, wherein the target balanced large cycle type is a state that the number of ignition cylinders in each small cycle of the engine is the same and the loads of all cylinders in the whole large cycle are balanced;
a fourth determining module, configured to determine a cylinder deactivation operating condition area in which the updated operating condition point is located if the operating condition point of the engine is updated, and determine an updated target cylinder deactivation number;
the switching module is used for switching the target equalizing large cycle type into the updated target equalizing large cycle type in response to determining the updated target equalizing large cycle type corresponding to the updated target cylinder deactivation number;
the third determining module is configured to determine a target balanced large cycle type of the engine according to the target cylinder deactivation number, and includes:
and determining a target balanced large cycle type corresponding to the target cylinder deactivation number according to the corresponding relation between the cylinder deactivation number and the balanced large cycle type.
6. The apparatus of claim 5, wherein the means for switching the target equalization large loop type to the updated target equalization large loop type comprises:
the system comprises an acquisition sub-module, a control sub-module and a control sub-module, wherein the acquisition sub-module is used for acquiring a target switching opportunity of an equilibrium large-cycle type, and the target switching opportunity comprises a target switching outlet and a target switching inlet;
and the switching sub-module is used for switching the target balanced large-cycle type into the updated target balanced large-cycle type based on the target switching outlet and the target switching inlet.
7. The apparatus of claim 6, wherein the acquisition submodule specifically comprises:
and calculating and determining the target switching time of the balanced large-cycle type in a dynamic simulation mode.
8. The apparatus of claim 5, wherein the apparatus further comprises:
and a fifth determining module, configured to determine an oil injection amount of the engine according to the target balanced large cycle type.
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