Control method, device, equipment, medium and product

Abstract

The invention discloses a control method, device and equipment, a medium and a product. Relates to the technical field of vehicles. According to the operation parameters of the engine, the current working condition of the engine is determined, and the current working condition of the engine comprises any one of the first working condition, the second working condition and the third working condition; a current engine working mode corresponding to the current working condition of the engine is determined, and the current engine working mode comprises any one of a mild Miller cycle coupling multi-cylinder deactivation mode, a deep Miller cycle coupling single-cylinder deactivation mode, a diesel engine working mode and a mild Miller cycle mode; according to the technical scheme, the efficiency and emission problems of the diesel engine under the low load can be solved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of vehicle technology, and in particular to a control method, device, equipment, medium and product. Background Technology

[0002] With the upgrading of emission regulations, the overall speed and torque testing points are concentrated in the low-speed, low-load range, which places higher demands on emission control under low-load conditions. On the one hand, the lower combustion chamber wall temperature and cylinder temperature make it difficult for fuel to burn completely, resulting in relatively high incomplete combustion losses and poor fuel economy. On the other hand, the excessively low exhaust temperature restricts the function of aftertreatment technology, resulting in low aftertreatment conversion efficiency and difficulty in effectively controlling various harmful emissions. Therefore, reducing incomplete combustion losses, maintaining high thermal efficiency, and increasing exhaust temperature are key to improving the performance of diesel engines under low-load conditions.

[0003] To address the above challenges, two main technical approaches are proposed:

[0004] Miller cycle: By delaying or advancing the closing of the intake valve, the effective compression ratio is reduced, thereby reducing pumping losses and in-cylinder combustion temperature (which helps reduce NOx). However, implementing a deep Miller cycle can worsen cold start performance and low-load combustion stability.

[0005] Cylinder deactivation: This technique stops the operation of some cylinders under low load (by cutting off fuel and closing the valves), concentrating the load on the remaining working cylinders and allowing them to operate at a higher and more efficient mean effective pressure. However, cylinder deactivation alone cannot optimize the intake process of the working cylinders themselves, and pumping losses still exist. Summary of the Invention

[0006] This invention provides a control method, apparatus, device, medium, and product that can solve at least one of the above-mentioned problems, thereby achieving an optimal balance between emissions and efficiency.

[0007] According to one aspect of the present invention, a control method is provided, executed by a controller in an engine, the control method comprising:

[0008] Obtain engine operating parameters;

[0009] Based on the engine operating parameters, the current operating condition of the engine is determined, wherein the current operating condition of the engine includes any one of the first operating condition, the second operating condition, and the third operating condition;

[0010] Determine the current engine operating mode corresponding to the current engine operating condition. The current engine operating mode includes any one of the following: mild Miller cycle coupled multi-cylinder cylinder deactivation mode, deep Miller cycle coupled single-cylinder cylinder deactivation mode, diesel engine operating mode, and mild Miller cycle mode.

[0011] Control is based on the current engine operating mode.

[0012] According to another aspect of the present invention, a control device is provided, disposed in a controller in an engine, the control device comprising:

[0013] Engine operating parameter acquisition module, used to acquire engine operating parameters;

[0014] The engine current operating condition determination module is used to determine the current operating condition of the engine based on the engine operating parameters, wherein the current operating condition of the engine includes any one of the first operating condition, the second operating condition, and the third operating condition.

[0015] The current engine operating mode determination module is used to determine the current engine operating mode corresponding to the current operating condition of the engine. The current operating mode includes any one of the following: mild Miller cycle coupled multi-cylinder cylinder deactivation mode, deep Miller cycle coupled single-cylinder cylinder deactivation mode, diesel engine operating mode, and mild Miller cycle mode.

[0016] The control module is used for control based on the current engine operating mode.

[0017] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0018] At least one processor; and

[0019] A memory communicatively connected to the at least one processor; wherein,

[0020] The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the control method described in any embodiment of the present invention.

[0021] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions for causing a processor to execute and implement the control method described in any embodiment of the present invention.

[0022] According to another aspect of the present invention, a computer program product is provided, which, when executed by a processor, implements the control method as described in any of the embodiments of the present invention.

[0023] This invention provides an embodiment that acquires engine operating parameters; determines the engine's current operating condition based on these parameters, wherein the current operating condition includes any one of a first operating condition, a second operating condition, and a third operating condition; determines the current engine operating mode corresponding to the current operating condition, wherein the current engine operating mode includes any one of a mild Miller cycle coupled multi-cylinder cylinder deactivation mode, a deep Miller cycle coupled single-cylinder cylinder deactivation mode, a diesel engine operating mode, and a mild Miller cycle mode; and performs control based on the current engine operating mode, thereby solving the efficiency and emission problems of diesel engines under low load.

[0024] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a flowchart of a control method according to an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of an engine structure according to an embodiment of the present invention;

[0028] Figure 3 This is a flowchart of another control method in an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of a control device according to an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0033] It is understood that before using the technical solutions disclosed in the various embodiments of this disclosure, users should be informed of the types, scope of use, and usage scenarios of the personal information involved in this disclosure in an appropriate manner in accordance with relevant laws and regulations, and user authorization should be obtained.

[0034] Example 1

[0035] Figure 1 This is a flowchart illustrating a control method provided in an embodiment of the present invention. This embodiment is applicable to engine control. The method can be executed by the control device in this embodiment, which can be implemented in software and / or hardware, such as... Figure 1 As shown, the method specifically includes the following steps:

[0036] S110, obtain engine operating parameters.

[0037] In this embodiment, as Figure 2 As shown, the engine includes: engine body 1, central controller (Electronic Control Unit, ECU) 2, high-pressure common rail 3, fuel injectors 4, combined high-pressure pump 5, variable valve drive assembly 6, exhaust gas recirculation (EGR) system 7, intake intercooler 8, variable geometry turbocharger (VGT) 9, intake unit 10, exhaust unit 11, and various sensors. All actuators are connected to the central controller 2. The engine in this embodiment is a new type of heavy-duty diesel engine equipped with a camless electro-hydraulic fully variable valve system, a high-pressure common rail fuel system, a variable geometry turbocharger, an EGR system, and other electronically controlled components. This diesel engine is a camless heavy-duty diesel engine, which can achieve continuous variable valve lift and timing in the valve train. Combined with the high-pressure common rail fuel system, it can achieve completely flexible and controllable air and fuel circuits.

[0038] It should be noted that the camless electro-hydraulic fully variable valve system (including) Figure 2 The combined high-pressure pump 5 and variable valve drive assembly 6 are used to achieve Miller cycle and cylinder deactivation functions. Miller cycle is achieved by controlling the closing time of the intake valves, and single-cylinder or multi-cylinder cylinder deactivation is achieved by controlling the on / off state of the valve drive unit solenoid valves. High-pressure common rail fuel system (including...) Figure 2 The common rail system (3 and injectors 4) is responsible for providing precisely metered fuel to each cylinder. The variable geometry turbocharger (VGT) includes... Figure 2 Variable Geometry Turbocharger (VGT) 9: Adjusts the turbine nozzle cross-section in real time according to intake demand to compensate for the effects of Miller cycle and cylinder deactivation mode on intake volume. EGR system (including Figure 2 EGR System 7: Adjusts the EGR valve opening in real time according to combustion requirements under different operating conditions, utilizing high-temperature exhaust and inert gases to increase intake air temperature and control maximum combustion temperature. 2. Sensor System ( Figure 2 (Unlabeled components): These include engine speed sensors, load sensors, intake air pressure / temperature sensors, coolant temperature sensors, exhaust air temperature sensors, and NOx sensors, used to monitor engine operating status in real time. 3. Central Controller (ECU) ( Figure 2 Central Controller (ECU) 2: This is the core of the system and contains a pre-stored collaborative control MAP diagram calibrated based on a large amount of experimental data.

[0039] Figure 2 The main exhibit showcases the fuel injection system components and intake and exhaust system components required for engine combustion. The engine fuel system uses a combined high-pressure pump 5 to supply high-pressure diesel fuel to the high-pressure common rail 3. The high-pressure diesel fuel enters the injector 4, which injects it into the cylinders at regular intervals and in measured quantities. Simultaneously, the combined high-pressure pump 5 supplies high-pressure engine oil to the variable valve timing assembly 6, which controls the lift and timing of the intake and exhaust valves according to engine operating conditions. Air passes through the intake unit 10 and enters the variable geometry turbocharger (VGT) 9 for pressurization, then passes through the intake intercooler 8. Diesel exhaust passes through the EGR system 7 and enters the cylinders along with fresh air. The diesel fuel and air-fuel mixture in the cylinders are burned and then discharged through the exhaust unit 11.

[0040] In this embodiment, the engine operating parameters include at least one of the following: coolant temperature, exhaust temperature, accelerator pedal opening, engine speed, and load.

[0041] In this embodiment, the controller receives sensor signals in real time to obtain information such as engine coolant temperature, exhaust temperature, speed, and load.

[0042] S120 determines the current operating condition of the engine based on the engine's operating parameters.

[0043] The current operating condition of the engine includes any one of the following: the first operating condition, the second operating condition, and the third operating condition.

[0044] In this embodiment, the first operating condition includes: cold start or low load operating condition, the second operating condition includes: medium to high load operating condition, and the third operating condition includes: full load operating condition or rapid acceleration operating condition.

[0045] In this embodiment, the current operating condition of the engine can be determined based on the engine operating parameters as follows: if the accelerator pedal opening is less than 20%, the current operating condition of the engine is determined to be a low-load condition; if the accelerator pedal opening is greater than 20% and less than 90%, the current operating condition of the engine is determined to be a medium-high load condition; and if the accelerator pedal opening is greater than 90%, the current operating condition of the engine is determined to be a full-load condition.

[0046] S130 determines the current engine operating mode corresponding to the current engine operating condition.

[0047] The current engine operating modes include any one of the following: mild Miller cycle coupled multi-cylinder cylinder deactivation mode, deep Miller cycle coupled single-cylinder cylinder deactivation mode, diesel engine operating mode, and mild Miller cycle mode.

[0048] In this embodiment, the current engine operating mode corresponding to the current engine operating condition can be determined as follows: if the current engine operating condition is a cold start or low load condition, the current engine operating mode is determined to be a mild Miller cycle coupled multi-cylinder deactivation mode; if the current engine operating condition is a medium-high load condition, the current engine operating mode is determined to be a deep Miller cycle coupled single-cylinder deactivation mode; if the current engine operating condition is a full load condition, the current engine operating mode is determined to be a diesel engine operating mode or a mild Miller cycle mode.

[0049] Optionally, the first operating condition includes: cold start or low load operating condition; the second operating condition includes: medium to high load operating condition; and the third operating condition includes: full load operating condition.

[0050] Determine the current engine operating mode corresponding to the current engine operating condition, including:

[0051] If the engine's current operating condition is cold start or low load, then the current engine operating mode is determined to be mild Miller cycle coupled multi-cylinder deactivation mode.

[0052] In this embodiment, the industry problem of low efficiency and high emissions of the aftertreatment system during cold start of diesel engines is effectively solved by using a mild Miller cycle coupled multi-cylinder deactivation mode.

[0053] If the engine is currently operating under medium to high load conditions, then the current engine operating mode is determined to be the deep Miller cycle coupled single-cylinder cylinder deactivation mode.

[0054] If the engine is currently operating under full load, then the current engine operating mode is determined to be either diesel engine operating mode or mild Miller cycle mode.

[0055] In this embodiment, the diesel engine operating mode is the normal diesel engine operating mode.

[0056] In this embodiment, the optimal operating mode can be automatically selected based on real-time operating conditions (speed, load, temperature), achieving the best balance between emissions, efficiency, and power.

[0057] It should be noted that when the engine is under cold start or low load conditions, it enters a mild Miller cycle coupled multi-cylinder deactivation mode. This mode uses a smaller intake valve early closing angle to stop fuel injection and valve movement in a specified number of cylinders, increasing the load rate of the working cylinders, rapidly raising the coolant and exhaust temperatures, and promoting rapid ignition of after-treatment systems (such as DOC and SCR). When the engine is under medium to high load conditions, it enters a deep Miller cycle coupled single-cylinder deactivation mode. This mode uses a larger intake valve early closing angle, combined with single-cylinder deactivation. As the load increases, the intake valve early closing angle decreases, prioritizing thermal efficiency while maintaining power output and considering NOx control. When the engine is under full load conditions, it uses a mild Miller cycle or switches to a conventional diesel engine operating mode. This mode aims for maximum power and torque, employing optimal valve timing to ensure sufficient intake air volume.

[0058] Optionally, control can be based on the current engine operating mode, including:

[0059] Based on the engine operating parameters, the corresponding relationship table for the current working mode is queried to obtain the target control parameters, and control is performed based on the target control parameters. The target control parameters include at least one of the following: early intake valve closing angle, number of cylinder deactivation, fuel injection quantity, VGT blade angle of variable geometry turbocharger, and EGR valve opening.

[0060] In this embodiment, if the engine's operating mode is a mild Miller cycle coupled multi-cylinder deactivation mode, the target control parameters are obtained by querying the corresponding relationship table for the mild Miller cycle coupled multi-cylinder deactivation mode based on the engine's operating parameters. The target control parameters include: a first intake valve early closing angle, a first number of deactivated cylinders, a first fuel injection quantity, a first VGT blade angle, and a first EGR valve opening. If the engine's operating mode is a deep Miller cycle coupled single-cylinder deactivation mode, the target control parameters are obtained by querying the corresponding relationship table for the deep Miller cycle coupled single-cylinder deactivation mode based on the engine's operating parameters. The target control parameters include: a second intake valve early closing angle, a second number of deactivated cylinders, a second fuel injection quantity, a second VGT blade angle, and a second EGR valve opening. The first number of deactivated cylinders is greater than the second number of deactivated cylinders, the first intake valve early closing angle is less than the second intake valve early closing angle, the first VGT blade angle is less than the second VGT blade angle, and the first EGR valve opening is greater than the second EGR valve opening. If the engine is operating in diesel mode, the target control parameters are obtained by querying the corresponding relationship table for diesel engine operating mode based on the engine operating parameters. These target control parameters include: the early closing angle of the third intake valve, the angle of the third VGT blade, and the opening degree of the third EGR valve. The early closing angle of the third intake valve is greater than the early closing angle of the second intake valve, the angle of the third VGT blade is greater than the angle of the second VGT blade, and the opening degree of the third EGR valve is less than the opening degree of the second EGR valve. If the engine is operating in mild Miller cycle mode, the target control parameters are obtained by querying the corresponding relationship table for mild Miller cycle mode based on the engine operating parameters. These target control parameters include: the early closing angle of the fourth intake valve, the angle of the fourth VGT blade, and the opening degree of the fourth EGR valve. The early closing angle of the fourth intake valve is greater than the early closing angle of the second intake valve, the angle of the fourth VGT blade is greater than the angle of the second VGT blade, and the opening degree of the fourth EGR valve is less than the opening degree of the second EGR valve.

[0061] In this embodiment, the method of obtaining the target control parameters by querying the relationship table corresponding to the current working mode based on the engine operating parameters can be as follows: query the relationship table corresponding to the current working mode based on the engine operating parameters to obtain the initial control parameters, and then compare the control parameters with the target requirements based on the actual exhaust temperature, NOx emission value, and internal control model calculation value of the engine to obtain the target control parameters.

[0062] It should be noted that the engine controller retrieves and outputs initial control parameters from a pre-stored relation table based on the current engine operating mode requirements. It then compares the actual exhaust temperature, NOx emission value, and internal control model calculation value with the target requirements to correct the control parameters and output the optimal control parameters, ensuring that the engine operates in its best condition.

[0063] Optionally, the early intake valve closing angle corresponding to the mild Miller cycle coupled multi-cylinder cylinder deactivation mode is smaller than the early intake valve closing angle corresponding to the deep Miller cycle coupled single-cylinder cylinder deactivation mode; the early intake valve closing angle corresponding to the deep Miller cycle coupled single-cylinder cylinder deactivation mode is smaller than the early intake valve closing angle corresponding to the diesel engine operating mode or the mild Miller cycle mode; the number of cylinders deactivated corresponding to the mild Miller cycle coupled multi-cylinder cylinder deactivation mode is greater than the number of cylinders deactivated corresponding to the deep Miller cycle coupled single-cylinder cylinder deactivation mode; the VGT vane angle corresponding to the mild Miller cycle coupled multi-cylinder cylinder deactivation mode is smaller than the VGT vane angle corresponding to the deep Miller cycle coupled single-cylinder cylinder deactivation mode; the VGT vane angle corresponding to the deep Miller cycle coupled single-cylinder cylinder deactivation mode is smaller than the VGT vane angle corresponding to the diesel engine operating mode or the mild Miller cycle mode; the EGR valve opening degree corresponding to the mild Miller cycle coupled multi-cylinder cylinder deactivation mode is greater than the EGR valve opening degree corresponding to the deep Miller cycle coupled single-cylinder cylinder deactivation mode; the EGR valve opening degree corresponding to the deep Miller cycle coupled single-cylinder cylinder deactivation mode is greater than the EGR valve opening degree corresponding to the diesel engine operating mode or the mild Miller cycle mode.

[0064] In this embodiment, the mild Miller cycle coupling multi-cylinder deactivation mode uses a smaller intake valve early closing angle, multi-cylinder deactivation, a smaller VGT vane angle, and a larger EGR valve opening. The deep Miller cycle coupling single-cylinder deactivation mode uses a larger intake valve early closing angle, single-cylinder deactivation, a moderate VGT vane angle, and a moderate EGR valve opening. The mild Miller cycle coupling or normal diesel engine operation mode uses the maximum intake volume intake valve closing angle, cylinder deactivation, a larger VGT vane angle, and a smaller EGR valve opening.

[0065] Optional, also includes:

[0066] Obtain the engine's operating exhaust temperature and nitrogen oxide emission values;

[0067] The control parameters in the relationship table are adjusted based on the engine's operating exhaust temperature and nitrogen oxide emission values.

[0068] In this embodiment, the control parameters in the relationship table can be adjusted based on the engine's operating exhaust temperature and nitrogen oxide emission values ​​as follows: the control parameters in the relationship table are adjusted based on the difference between the engine's operating exhaust temperature and nitrogen oxide emission values ​​and the target values.

[0069] It should be noted that the control parameters in the relationship table corresponding to the current engine operating mode are adjusted based on the engine's exhaust temperature and nitrogen oxide emission values ​​corresponding to the current engine operating mode.

[0070] S140 controls the engine based on the current engine operating mode.

[0071] Optionally, the engine further includes: fuel injectors, a variable valve drive assembly, an EGR system, and a variable geometry turbocharger;

[0072] Control based on the target control parameters includes:

[0073] Based on the number of cylinders to be stopped, a cylinder stop command is generated and sent to the corresponding cylinder to switch the cylinder from the working state to the stopped state.

[0074] The intake valve early closing angle is sent to the variable valve drive assembly of the cylinder in operation so that the variable valve drive assembly controls the valve angle to be the intake valve early closing angle.

[0075] The fuel injection quantity is sent to the fuel injector so that the fuel injector injects high-pressure diesel fuel corresponding to the fuel injection quantity into the cylinder.

[0076] The VGT blade angle is sent to the variable geometry turbocharger so that the variable geometry turbocharger can adjust its angle based on the VGT blade angle;

[0077] The EGR valve opening is sent to the EGR system so that the EGR system can adjust the valve opening based on the EGR valve opening.

[0078] In this embodiment, as Figure 2As shown, the engine also includes: a high-pressure common rail 3, injectors 4, a combined high-pressure pump 5, a variable valve drive assembly 6, an EGR system 7, an intake intercooler 8, a variable geometry turbocharger (VGT) 9, an intake unit 10, an exhaust unit 11, and multiple sensors 12. The high-pressure common rail 3, injectors 4, combined high-pressure pump 5, variable valve drive assembly 6, EGR system 7, intake intercooler 8, variable geometry turbocharger (VGT) 9, intake unit 10, exhaust unit 11, and multiple sensors are all connected to the controller. The combined high-pressure pump 5 provides high-pressure diesel fuel to the high-pressure common rail 3, which in turn provides high-pressure diesel fuel to the injectors 4. The injectors 4 inject the corresponding high-pressure diesel fuel into the cylinders according to the injection quantity sent by the ECU. Simultaneously, the combined high-pressure pump 5... High-pressure engine oil is supplied to the variable valve drive assembly 6. The variable valve drive assembly 6 simultaneously receives the intake valve early closing angle sent by the ECU and controls the intake valve according to the intake valve early closing angle. The intake and exhaust valve lift and timing are controlled according to the engine operating conditions. Air enters the variable geometry turbocharger (VGT) 9 through the intake unit 10. The variable geometry turbocharger (VGT) 9 adjusts the blade angle according to the blade angle sent by the ECU and pressurizes the air. After pressurization, the air passes through the intake intercooler 8. The diesel engine exhaust is input into the EGR system. The EGR system adjusts the valve opening based on the EGR valve opening sent by the ECU. After adjustment, the exhaust passes through the EGR system 7 and enters the cylinder together with fresh air. The diesel fuel and air-fuel mixture in the cylinder are burned and discharged through the exhaust unit 11.

[0079] In this embodiment, a hysteresis range is set during engine operating mode switching to avoid frequent switching between different operating modes. The system optimizes the fuel-air coordination during cylinder deactivation and deactivation, and coordinates the variable geometry turbocharger and EGR valve for flexible control, ensuring a smooth transition in torque output and avoiding perceived shocks to the driver. Through the mode switching transition algorithm, driving smoothness is ensured when switching between different operating modes, improving the user experience.

[0080] This embodiment provides a synergistic control method combining Miller cycle and cylinder deactivation technology in a diesel engine. It can intelligently and smoothly switch and merge between Miller cycle mode and cylinder deactivation mode based on the engine's real-time operating conditions, organically combining the low-temperature combustion advantages of the Miller cycle with the reduced pumping gas loss advantages of cylinder deactivation technology, achieving a "1+1>2" effect. This significantly reduces NOx emissions and fuel consumption across the entire operating range, thereby achieving an optimal balance between emissions and thermal efficiency.

[0081] In a specific example, such as Figure 3As shown, in low-load areas (such as idling and slow city driving), the core objective is to optimize in-cylinder combustion, minimize pumping and mechanical losses, and improve exhaust manifold temperature while maintaining fuel economy. The main strategy is a mild Miller cycle, with intake valves closing slightly earlier and the compression ratio moderately reduced to ensure combustion stability. More than half of the cylinders are shut down (e.g., 3 out of 6 cylinders are shut down), increasing the load on the remaining cylinders and moving them away from the inefficient zone, significantly reducing pumping losses. Subsystem coordination involves a variable geometry turbocharger (VGT), where turbine blades are adjusted to a small angle to reduce exhaust back pressure, allowing exhaust gases to be expelled more smoothly and further reducing pumping losses. High-ratio EGR is used, where power demand is low, and the large amount of exhaust gas recirculation significantly reduces combustion temperature, thereby greatly suppressing NOx formation. In medium-to-high load areas (such as high-speed cruising and smooth acceleration), the core objective is to pursue maximum thermal efficiency while maintaining good power response and controlling emissions. Main strategy: Deep Miller cycle, with intake valves closing significantly earlier to achieve a high expansion ratio, maximizing the utilization of combustion gas energy, which is key to improving thermal efficiency. Only one or a few cylinders are shut down, partially reducing pumping losses and increasing the load on the remaining cylinders to their most efficient operating range. Subsystem coordination: Variable geometry turbocharger (VGT) precisely adjusts boost pressure to ensure sufficient intake density and power output even with reduced intake volume due to the Miller cycle. EGR: Medium-ratio EGR is used to balance NOx control and maintaining combustion efficiency. Full load / rapid acceleration conditions (e.g., overtaking, climbing steep hills), core objective: providing maximum power output. Main strategy: Conventional cycle or mild Miller cycle. To ensure maximum intake volume, a conventional cycle is typically used. Alternatively, in new technology engines, a very mild Miller cycle is used as the basic design to balance part-load efficiency. All cylinders are fully engaged, providing all power. Subsystem coordination: Variable Geometry Turbocharger (VGT), with blades adjusted to a large angle, provides maximum boost pressure, forcing as much air as possible into the cylinders. EGR: Off or at a very low ratio, at which point as much fresh air as possible is needed to support maximum fuel combustion, and the EGR system temporarily shuts down.

[0082] Figure 3 This demonstrates a highly integrated and intelligent diesel engine control concept: the ECU makes millisecond-level decisions based on real-time data. Load is the core of the decision-making process; the primary challenges differ under different loads, leading to fundamental switching of the operating mode. Miller cycle, cylinder deactivation, VGT, and EGR are no longer isolated technologies but rather work in tandem and reinforce each other. For example, cylinder deactivation technology creates conditions for the stable application of the Miller cycle under low loads (higher load on the working cylinder). VGT compensates for the intake losses caused by the Miller cycle. The EGR ratio is dynamically matched with the load and Miller cycle depth, always keeping emissions at optimal levels.

[0083] In summary, the embodiments of the present invention provide a practical solution for clean and efficient combustion in diesel engines, which has good prospects for industrial application.

[0084] This invention discloses a method for the coordinated control of Miller cycle and cylinder deactivation technology in diesel engines, belonging to the field of internal combustion engine technology. It aims to solve the technical problems of low thermal efficiency, large pumping losses, and low exhaust temperature leading to decreased efficiency of the aftertreatment system in existing diesel engines under partial load conditions. The method combines Miller cycle technology with cylinder deactivation technology and designs a coordinated control strategy. By adjusting the variable geometry turbocharger and exhaust gas recirculation system, exhaust temperature and air-fuel ratio are coordinated and controlled. This significantly improves the thermal efficiency of the diesel engine across the entire operating range, especially significantly reducing fuel consumption under low load, while effectively increasing exhaust temperature to ensure that aftertreatment systems (such as DPF and SCR) can still operate efficiently in low-temperature environments, meeting increasingly stringent emission regulations.

[0085] In addition, Miller cycle and cylinder deactivation technology work together to control VGT and EGR, ensuring high engine thermal efficiency and low emissions.

[0086] It should be noted that the cylinder deactivation rate increases as the engine load decreases, and the Miller cycle depth of the working cylinder also increases accordingly.

[0087] The technical solution of this embodiment obtains engine operating parameters; determines the current operating condition of the engine based on the engine operating parameters, wherein the current operating condition of the engine includes any one of a first operating condition, a second operating condition, and a third operating condition; determines the current engine operating mode corresponding to the current engine operating condition, wherein the current engine operating mode includes any one of a mild Miller cycle coupled multi-cylinder cylinder deactivation mode, a deep Miller cycle coupled single-cylinder cylinder deactivation mode, a diesel engine operating mode, and a mild Miller cycle mode; and controls the engine based on the current engine operating mode, which can solve the efficiency and emission problems of diesel engines under low load.

[0088] Example 2

[0089] Figure 4 This is a schematic diagram of a control device provided in an embodiment of the present invention. This embodiment is applicable to situations involving engine control. The device can be implemented using software and / or hardware, and can be integrated into any device that provides control functions, such as… Figure 4 As shown, the control device specifically includes: an engine operating parameter acquisition module 410, an engine current operating condition determination module 420, a current engine operating mode determination module 430, and a control module 440.

[0090] Among them, the engine operating parameter acquisition module is used to acquire engine operating parameters;

[0091] The engine current operating condition determination module is used to determine the current operating condition of the engine based on the engine operating parameters, wherein the current operating condition of the engine includes any one of the first operating condition, the second operating condition, and the third operating condition.

[0092] The current engine operating mode determination module is used to determine the current engine operating mode corresponding to the current operating condition of the engine. The current operating mode includes any one of the following: mild Miller cycle coupled multi-cylinder cylinder deactivation mode, deep Miller cycle coupled single-cylinder cylinder deactivation mode, diesel engine operating mode, and mild Miller cycle mode.

[0093] The control module is used for control based on the current engine operating mode.

[0094] The above-described products can perform the methods provided in any embodiment of the present invention, and have the corresponding functional modules and beneficial effects for performing the methods.

[0095] Example 3

[0096] Figure 5 A schematic diagram of an electronic device 10 that can be used to implement embodiments of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital assistants, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0097] like Figure 5 As shown, the electronic device 50 includes at least one processor 51 and a memory, such as a read-only memory (ROM) 52 and a random access memory (RAM) 53, communicatively connected to the at least one processor 51. The memory stores computer programs executable by the at least one processor. The processor 51 can perform various appropriate actions and processes based on the computer program stored in the ROM 52 or loaded from storage unit 58 into the RAM 53. The RAM 53 can also store various programs and data required for the operation of the electronic device 50. The processor 51, ROM 52, and RAM 53 are interconnected via a bus 54. An input / output (I / O) interface 55 is also connected to the bus 54.

[0098] Multiple components in electronic device 50 are connected to I / O interface 55, including: input unit 56, such as keyboard, mouse, etc.; output unit 57, such as various types of monitors, speakers, etc.; storage unit 58, such as disk, optical disk, etc.; and communication unit 59, such as network card, modem, wireless transceiver, etc. Communication unit 59 allows electronic device 50 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0099] Processor 51 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 51 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 51 performs the various methods and processes described above, such as control methods.

[0100] In some embodiments, the control method may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 58. In some embodiments, part or all of the computer program may be loaded and / or installed on electronic device 50 via ROM 52 and / or communication unit 59. When the computer program is loaded into RAM 53 and executed by processor 51, one or more steps of the control method described above may be performed. Alternatively, in other embodiments, processor 51 may be configured to execute the control method by any other suitable means (e.g., by means of firmware).

[0101] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0102] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0103] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0104] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0105] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or middleware components (e.g., application servers), or frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0106] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0107] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0108] This invention also provides a computer program product, including a computer program that, when executed by a processor, implements the control method according to any embodiment of the invention.

[0109] In implementing the computer program product, computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof. Programming languages ​​include object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0110] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A control method, characterized in that, The control method, executed by a controller in the engine, includes: Obtain engine operating parameters; Based on the engine operating parameters, the current operating condition of the engine is determined, wherein the current operating condition of the engine includes any one of the first operating condition, the second operating condition, and the third operating condition; Determine the current engine operating mode corresponding to the current engine operating condition. The current engine operating mode includes any one of the following: mild Miller cycle coupled multi-cylinder cylinder deactivation mode, deep Miller cycle coupled single-cylinder cylinder deactivation mode, diesel engine operating mode, and mild Miller cycle mode. Control is based on the current engine operating mode.

2. The method according to claim 1, characterized in that, The first operating condition includes: cold start or low load condition; the second operating condition includes: medium to high load condition; and the third operating condition includes: full load condition. Determine the current engine operating mode corresponding to the current engine operating condition, including: If the engine's current operating condition is cold start or low load, then the current engine operating mode is determined to be mild Miller cycle coupled multi-cylinder deactivation mode. If the engine is currently operating under medium to high load conditions, then the current engine operating mode is determined to be the deep Miller cycle coupled single-cylinder cylinder deactivation mode. If the engine is currently operating under full load, then the current engine operating mode is determined to be either diesel engine operating mode or mild Miller cycle mode.

3. The method according to claim 2, characterized in that, Control is based on the current engine operating mode, including: Based on the engine operating parameters, the corresponding relationship table for the current working mode is queried to obtain the target control parameters, and control is performed based on the target control parameters. The target control parameters include at least one of the following: early intake valve closing angle, number of cylinder deactivation, fuel injection quantity, VGT blade angle of variable geometry turbocharger, and EGR valve opening.

4. The method according to claim 3, characterized in that, The early intake valve closing angle corresponding to the mild Miller cycle coupled multi-cylinder cylinder deactivation mode is smaller than that corresponding to the deep Miller cycle coupled single-cylinder cylinder deactivation mode; the early intake valve closing angle corresponding to the deep Miller cycle coupled single-cylinder cylinder deactivation mode is smaller than that corresponding to the diesel engine operating mode or the mild Miller cycle mode; the number of cylinders deactivated corresponding to the mild Miller cycle coupled multi-cylinder cylinder deactivation mode is greater than that corresponding to the deep Miller cycle coupled single-cylinder cylinder deactivation mode; the VGT blade angle corresponding to the mild Miller cycle coupled multi-cylinder cylinder deactivation mode is smaller than that corresponding to the deep Miller cycle coupled single-cylinder cylinder deactivation mode; the VGT blade angle corresponding to the deep Miller cycle coupled single-cylinder cylinder deactivation mode is smaller than that corresponding to the diesel engine operating mode or the mild Miller cycle mode. The EGR valve opening for the mild Miller cycle coupled multi-cylinder shutdown mode is greater than the EGR valve opening for the deep Miller cycle coupled single-cylinder shutdown mode. The EGR valve opening for the deep Miller cycle coupled single-cylinder shutdown mode is greater than the EGR valve opening for the diesel engine operating mode or the mild Miller cycle mode.

5. The method according to claim 3, characterized in that, The engine also includes: fuel injectors, a variable valve drive assembly, an EGR system, and a variable geometry turbocharger; Control based on the target control parameters includes: Based on the number of cylinders to be stopped, a cylinder stop command is generated and sent to the corresponding cylinder to switch the cylinder from the working state to the stopped state. The intake valve early closing angle is sent to the variable valve drive assembly of the cylinder in operation so that the variable valve drive assembly controls the valve angle to be the intake valve early closing angle. The fuel injection quantity is sent to the fuel injector so that the fuel injector injects high-pressure diesel fuel corresponding to the fuel injection quantity into the cylinder. The VGT blade angle is sent to the variable geometry turbocharger so that the variable geometry turbocharger can adjust its angle based on the VGT blade angle; The EGR valve opening is sent to the EGR system so that the EGR system can adjust the valve opening based on the EGR valve opening.

6. The method according to claim 3, characterized in that, Also includes: Obtain the engine's operating exhaust temperature and nitrogen oxide emission values; The control parameters in the relationship table are adjusted based on the engine's operating exhaust temperature and nitrogen oxide emission values.

7. A control device, characterized in that, The control device, configured in the controller of the engine, includes: Engine operating parameter acquisition module, used to acquire engine operating parameters; The engine current operating condition determination module is used to determine the current operating condition of the engine based on the engine operating parameters, wherein the current operating condition of the engine includes any one of the first operating condition, the second operating condition, and the third operating condition. The current engine operating mode determination module is used to determine the current engine operating mode corresponding to the current operating condition of the engine. The current operating mode includes any one of the following: mild Miller cycle coupled multi-cylinder cylinder deactivation mode, deep Miller cycle coupled single-cylinder cylinder deactivation mode, diesel engine operating mode, and mild Miller cycle mode. The control module is used for control based on the current engine operating mode.

8. An electronic device, characterized in that, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the control method according to any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that are used to cause a processor to execute the control method according to any one of claims 1-6.

10. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the control method according to any one of claims 1-6.

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