Engine idle speed control method, device and equipment and storage medium

Abstract

The invention discloses an engine idle speed control method, device and equipment and a storage medium, and relates to the technical field of engine control. The engine idle speed control method comprises the steps that the braking torque, the load torque, the target idle speed and the actual engine speed of an engine are obtained; performing feedback control processing according to the target idle speed and the actual engine speed to obtain an idle speed control torque; according to the actual engine rotating speed and the idle speed control torque, corrected interference torque is obtained; and the idle speed of the engine is controlled based on the braking torque, the load torque, the corrected interference torque and the idle speed control torque, the problem of how to reduce the influence of interference factors on idle speed control is solved, the stability of the idle speed rotating speed is improved, and the driving experience is improved.

Description

Technical Field

[0001] The present application relates to the technical field of engine control, and in particular to an engine idle speed control method, device, equipment and storage medium. Background Art

[0002] In the field of engine technology, idle speed control is a key technology to ensure that the engine runs at the lowest stable speed when it is not doing work. Under idle conditions, the engine needs to overcome internal friction and accessory consumption to maintain a stable speed. However, due to various factors such as changes in the intake system, fuel system and accessories, the idle speed often fluctuates, affecting driving comfort.

[0003] At present, the engine idle speed control methods mainly include PID control, neural network control and predictive control. Although PID control is widely used, it has the problems of relying on experience in parameter selection, low control accuracy and difficulty in dealing with complex time-varying nonlinear systems. Although neural network control can handle uncertainty, it has high learning complexity and there is a contradiction between instance scale and network scale. Although predictive control has ideal control effect, it has weak anti-interference ability and large amount of calculation, which makes it difficult to meet real-time requirements.

[0004] Therefore, how to reduce the impact of interference factors on idle speed control is a problem that needs to be solved urgently. Summary of the invention

[0005] The main purpose of this application is to provide an engine idle speed control method, device, equipment and storage medium, aiming to solve the technical problem of how to reduce the influence of interference factors on idle speed control.

[0006] To achieve the above object, the present application proposes an engine idle speed control method, the method comprising:

[0007] Obtain the engine's brake torque, load torque, target idle speed, and actual engine speed;

[0008] Performing feedback control processing according to the target idle speed and the actual engine speed to obtain an idle control torque;

[0009] obtaining a corrected interference torque according to the actual engine speed and the idle speed control torque;

[0010] An engine idle speed is controlled based on the brake torque, the load torque, the correction disturbance torque, and the idle speed control torque.

[0011] In one embodiment, the step of performing feedback control processing according to the target idle speed and the actual engine speed to obtain the idle control torque comprises:

[0012] Obtaining a deviation speed according to the target idle speed and the actual engine speed;

[0013] Feedback control is performed on the deviation speed to obtain an idle speed control torque.

[0014] In one embodiment, the step of obtaining the corrected disturbance torque according to the actual engine speed and the idle control torque comprises:

[0015] Performing nominal inverse processing on the actual engine speed to obtain an actual control torque;

[0016] The idle control torque and the actual control torque are subjected to low-pass filtering to obtain a corrected interference torque.

[0017] In one embodiment, the step of performing low-pass filtering on the idle control torque and the actual control torque to obtain the corrected interference torque includes:

[0018] Obtaining a deviation control torque according to the idle speed control torque and the actual control torque;

[0019] The deviation control torque is subjected to low-pass filtering to obtain a corrected interference torque.

[0020] In one embodiment, the step of controlling the engine idle speed based on the brake torque, the load torque, the corrected disturbance torque and the idle speed control torque comprises:

[0021] Obtain engine rotational inertia and equivalent disturbance torque;

[0022] Obtaining an engine speed change rate according to the braking torque, the load torque and the engine rotational inertia;

[0023] The engine idle speed is controlled according to the engine speed change rate, the corrected disturbance torque, the equivalent disturbance torque, and the idle speed control torque.

[0024] In one embodiment, the step of controlling the engine idle speed according to the engine speed change rate, the corrected disturbance torque, the equivalent disturbance torque and the idle speed control torque comprises:

[0025] Obtaining a target control speed according to the engine speed change rate, the corrected disturbance torque, the equivalent disturbance torque and the idle control torque control;

[0026] The engine idle speed is controlled according to the target control speed.

[0027] In one embodiment, before obtaining the engine moment of inertia and equivalent disturbance torque, the method further includes:

[0028] Obtain vehicle interference information;

[0029] The vehicle interference information is converted into an equivalent interference torque according to a preset conversion rule.

[0030] In addition, to achieve the above-mentioned purpose, the present application also proposes an engine idle speed control device, the device comprising:

[0031] An information acquisition module for the engine's brake torque, load torque, target idle speed, and actual engine speed;

[0032] An information processing module, configured to perform feedback control processing according to the target idle speed and the actual engine speed to obtain an idle control torque;

[0033] An interference correction module, used for obtaining a corrected interference torque according to the actual engine speed and the idle control torque;

[0034] The idle speed control module is configured to control the engine idle speed based on the brake torque, the load torque, the corrected disturbance torque and the idle speed control torque.

[0035] In addition, to achieve the above-mentioned purpose, the present application also proposes an engine idle speed control device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the engine idle speed control method as described above.

[0036] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by the processor, the steps of the engine idle speed control method described above are implemented.

[0037] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the engine idle speed control method as described above are implemented.

[0038] The present application provides an engine idle speed control method, and the method of the present application includes: obtaining the engine's braking torque, load torque, target idle speed, and actual engine speed; performing feedback control processing according to the target idle speed and the actual engine speed to obtain the idle speed control torque; obtaining a corrected interference torque according to the actual engine speed and the idle speed control torque; and controlling the engine idle speed based on the braking torque, the load torque, the corrected interference torque, and the idle speed control torque. In summary, the present application solves the technical problem of how to reduce the influence of interference factors on idle speed control by dynamically correcting the idle speed demand torque using an interference observer, and combining feedforward compensation and feedback control to estimate and compensate for unknown interference in real time, thereby achieving rapid response and precise control, improving the stability of the idle speed, and improving the driving experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0040] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0041] Figure 1 A flow chart of the first embodiment of the engine idle speed control method of the present application;

[0042] Figure 2 This is a schematic diagram of an idle speed control strategy for an embodiment of an engine idle speed control method of the present application;

[0043] Figure 3 A flow chart of a second embodiment of the engine idle speed control method of the present application;

[0044] Figure 4 A flowchart diagram of a third embodiment of the engine idle speed control method of the present application;

[0045] Figure 5 This is a schematic diagram of the diesel engine system structure of an embodiment of the engine idle speed control method of the present application;

[0046] Figure 6 This is a schematic diagram of the gasoline engine system structure of an embodiment of the engine idle speed control method of the present application;

[0047] Figure 7 This is a schematic diagram of the module structure of the engine idle speed control device according to an embodiment of the present application;

[0048] Figure 8 This is a schematic diagram of the device structure of the hardware operating environment involved in the engine idle speed control method in the embodiment of the present application.

[0049] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0050] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0051] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0052] The main solution of the embodiment of the present application is: to obtain the engine's braking torque, load torque, target idle speed and actual engine speed; to perform feedback control processing according to the target idle speed and the actual engine speed to obtain the idle control torque; to obtain a corrected interference torque according to the actual engine speed and the idle control torque; and to control the engine idle speed based on the braking torque, the load torque, the corrected interference torque and the idle control torque.

[0053] In the field of engine technology, idle speed control is a key technology to ensure that the engine runs at the lowest stable speed when it is not doing work. Under idle conditions, the engine needs to overcome internal friction and accessory consumption to maintain a stable speed. However, due to various factors such as changes in the intake system, fuel system and accessories, the idle speed often fluctuates, affecting driving comfort.

[0054] At present, the engine idle speed control methods mainly include PID control, neural network control and predictive control. Although PID control is widely used, it has the problems of relying on experience in parameter selection, low control accuracy and difficulty in dealing with complex time-varying nonlinear systems. Although neural network control can handle uncertainty, it has high learning complexity and there is a contradiction between instance scale and network scale. Although predictive control has ideal control effect, it has weak anti-interference ability and large amount of calculation, which makes it difficult to meet real-time requirements. Therefore, how to reduce the impact of interference factors on idle speed control is a problem that needs to be solved urgently.

[0055] The present application solves the technical problem of how to reduce the influence of interference factors on idle speed control by utilizing a disturbance observer to dynamically correct the idle speed demand torque and combining feedforward compensation with feedback control to estimate and compensate for unknown interference in real time, thereby achieving rapid response and precise control, improving the stability of the idle speed, and improving the driving experience.

[0056] It should be noted that the execution subject of this embodiment can be an engine idle speed control system, or a computing service device with data processing, network communication and program running functions, or an electronic device capable of realizing the above-mentioned engine idle speed control function, etc., and this embodiment does not specifically limit this. The following takes the engine idle speed control system as an example to illustrate this embodiment and the following embodiments.

[0057] Based on this, the embodiment of the present application provides an engine idle speed control method, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the engine idle speed control method of the present application.

[0058] In this embodiment, the engine idle speed control method includes steps S10 to S40:

[0059] Step S10: Obtain the engine's braking torque, load torque, target idle speed, and actual engine speed.

[0060] It should be noted that brake torque refers to the torque required to overcome internal friction and accessory consumption when the engine is idling. Load torque refers to the torque required for the engine's external accessories (such as air-conditioning compressors, generators, etc.) to work. The target idle speed is the speed that the engine is expected to maintain at idle conditions, which is usually pre-set according to the type, performance, operating conditions, etc. of different vehicles. The actual engine speed refers to the actual current speed of the engine, which is measured in real time by the speed sensor.

[0061] In addition, it should be noted that in this step, the system will collect the engine's braking torque and load torque in real time through the EMS sensor network. The braking torque is mainly composed of internal engine friction, accessory consumption, and torque generated by electronic throttle or ignition system adjustment. Load torque includes external loads, such as the torque requirements of accessories such as air-conditioning compressors and power steering devices. At the same time, the actual engine speed is obtained through the speed sensor. It can be understood that the role of this step is to ensure that the system can accurately grasp the current operating status of the engine, including its power output and external load conditions, as well as the deviation between the actual speed and the target idle speed, to provide an accurate data basis for subsequent control strategies.

[0062] Step S20: performing feedback control processing according to the target idle speed and the actual engine speed to obtain an idle control torque.

[0063] It should be noted that if Figure 2As shown, the system will perform feedback control through a feedback controller, which is a PID controller. In this step, the system will use a classic PID controller as a feedback controller, and calculate the idle control torque through a PID algorithm based on the deviation between the target idle speed and the actual engine speed.

[0064] In a feasible implementation manner, the step S20 specifically includes:

[0065] Step S201: Obtaining a deviation speed according to the target idle speed and the actual engine speed.

[0066] It should be noted that in this step, the system will compare the target idle speed of the engine with the actual engine speed, and obtain the deviation speed through subtraction. The deviation speed reflects the difference between the current engine speed and the target idle speed, and is the basis for subsequent control strategy adjustments. By calculating the deviation speed, the direction and amplitude of the control system that needs to be adjusted can be clearly determined to ensure that the engine can quickly and stably reach the target idle speed. For example, when the air-conditioning system is suddenly turned on during vehicle driving, the operation of the air-conditioning compressor will increase the load on the engine, causing the actual engine speed to drop. At this time, the system will recalculate the target idle speed according to the current working conditions, and compare it with the actual speed to obtain the deviation speed. The control system will make corresponding adjustments based on this deviation speed to maintain the stability of the engine idle speed.

[0067] Step S202: performing feedback control processing on the deviation speed to obtain idle speed control torque.

[0068] It should be noted that, specifically, after the feedback controller receives the deviation speed, the feedback controller will calculate the corresponding control amount according to the PID control algorithm and the size and change trend of the deviation speed. This control amount is the idle control torque, which is used to adjust the torque output of the engine to eliminate the deviation speed and make the engine speed reach the target idle speed, as shown in the following formula 1:

[0069]

[0070] Where s is the deviation speed, and the PID controller is based on the proportion (P, i.e. 1), the integral (I, i.e. 1 / T i s), differential (D, that is, T d s) The three parameters are used to adjust the deviation to output a suitable control signal so that the actual engine speed approaches and stabilizes at the target idle speed as quickly as possible.

[0071] Step S30: obtaining a corrected disturbance torque according to the actual engine speed and the idle control torque.

[0072] It should be noted that in this step, the system will use the disturbance observer to perform real-time analysis on the actual engine speed and idle control torque to obtain the corrected disturbance torque. In addition, it should be noted that the disturbance observer is a mathematical model or algorithm for estimating external disturbances of the system, which can compensate for these disturbances by dynamically adjusting the corrected disturbance torque during the system control process. The corrected disturbance torque refers to the torque value calculated by the disturbance observer and used to correct the idle speed fluctuation caused by external disturbances.

[0073] Step S40: Controlling the engine idle speed based on the brake torque, the load torque, the corrected disturbance torque and the idle speed control torque.

[0074] It should be noted that if Figure 2 As shown, in this step, the system will combine the corrected interference torque with the brake torque and the load torque to generate the corresponding engine output torque through the electronic throttle and the injection system (or the ignition coil control module for gasoline engines). By continuously adjusting the engine output torque, the interference torque at the actual engine idle speed is offset, thereby achieving stable control of the idle speed.

[0075] The present embodiment provides an engine idle speed control method, and the method of the present embodiment includes: obtaining the engine's braking torque, load torque, target idle speed, and actual engine speed; performing feedback control processing according to the target idle speed and the actual engine speed to obtain the idle speed control torque; obtaining the corrected interference torque according to the actual engine speed and the idle speed control torque; and controlling the engine idle speed based on the braking torque, the load torque, the corrected interference torque, and the idle speed control torque. In summary, the present embodiment solves the technical problem of how to reduce the influence of interference factors on idle speed control by dynamically correcting the idle speed demand torque using a disturbance observer, and combining feedforward compensation and feedback control to estimate and compensate for unknown interference in real time, thereby achieving rapid response and precise control, improving the stability of the idle speed, and improving the driving experience.

[0076] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can refer to the above introduction, and will not be repeated later. Figure 3 , Figure 3 This is a flow chart of the second embodiment of the engine idle speed control method of the present application, wherein step S30 specifically includes:

[0077] Step S301: performing nominal inverse processing on the actual engine speed to obtain the actual control torque.

[0078] It should be noted that if Figure 2As shown in FIG. 1 , the disturbance observer is composed of a nominal inverse model and a low-pass filter. The nominal inverse process refers to the use of the reverse operation of the engine speed model to convert the actual measured engine speed into the corresponding actual control torque. As shown in the following equation 2, the actual control torque can be obtained by reverse calculation.

[0079]

[0080] Where k is the proportional constant (i.e. the proportional relationship between torque and speed), and τ is the time constant, which is determined based on actual vehicle tests. The time constant τ refers to the time required for engine actuators such as throttle valves and injectors to reach the required opening or injection amount under the premise of issuing instructions without interference.

[0081] In addition, it should be noted that the "actual control" in the actual control torque refers to the theoretical torque value obtained by converting the actual engine speed through the nominal inverse model. It does not represent the actual measured value of the engine output torque, but is a calculation result based on the model and algorithm.

[0082] Step S302: performing low-pass filtering on the idle control torque and the actual control torque to obtain a corrected interference torque.

[0083] It should be noted that low-pass filtering is achieved through a low-pass filter. The function of low-pass filtering is to allow low-frequency signals to pass through and suppress high-frequency signals. By reasonably designing the cutoff frequency and order of the filter, effective suppression of interference of different frequencies can be achieved. At the same time, the design of the filter needs to be optimized according to the characteristics and control requirements of the actual system. For the filter design of idling conditions, filtering is usually considered when there is external interference to achieve precise control of external torque loading. Specifically, it is assumed that the α filter is designed for the case where the vehicle lighting type is turned on; the β filter is designed for the case where the air conditioning load is turned on, and the γ filter is designed for the case where the turn signal, wiper, and glass lifting are turned on.

[0084] In a feasible implementation manner, the step S302 specifically includes:

[0085] Step A10: Obtaining a deviation control torque according to the idle control torque and the actual control torque.

[0086] It should be noted that in this step, the system will perform a difference calculation between the idle control torque and the actual control torque to obtain the deviation control torque. This deviation reflects the gap between the current idle control state and the target state, and is the basis for subsequent low-pass filtering to eliminate external interference. It can be understood that by calculating the deviation control torque, the idle control deviation caused by external interference can be clearly identified, providing accurate data input for the subsequent low-pass filtering process.

[0087] Step A20: low-pass filtering the deviation control torque to obtain a corrected interference torque.

[0088] It should be noted that the system will design a suitable low-pass filter based on the actual vehicle test data. For example, a multi-order low-pass filter series connection as shown in the following formula 3 can be used to ensure that the filter has a good signal pass rate below the cut-off frequency and effectively suppresses high-frequency noise. Specifically, the system will use the deviation control torque as the input signal of the filter and perform low-pass filtering through the filter. The filter will smooth the input signal according to the designed cut-off frequency and filter order to remove high-frequency interference components. The output signal after low-pass filtering is the corrected interference torque. The corrected interference torque reflects the steady-state component of the idle control deviation caused by external interference after filtering, which is used for subsequent feedforward compensation.

[0089]

[0090] Among them, α, β, γ are three low-pass filters with cut-off frequencies connected in series, where α, β, γ are the cut-off frequencies of the three low-pass filters, which are parameters determined based on actual vehicle test data.

[0091] In this embodiment, the nominal inverse model and the low-pass filter in the disturbance observer can significantly improve the anti-interference ability of the idle speed control system, so that the system can maintain more stable and accurate idle speed control when facing complex and changeable working conditions.

[0092] Based on the first and second embodiments of the present application, in the third embodiment of the present application, the same or similar contents as those in the first and second embodiments can be referred to the above description, and will not be described in detail later. Figure 4 , Figure 4 This is a flow chart of the third embodiment of the engine idle speed control method of the present application, wherein step S40 specifically includes:

[0093] Step S401: Obtain engine rotational inertia and equivalent disturbance torque.

[0094] It should be noted that the engine moment of inertia is an inherent physical property of the engine, which can be found according to the corresponding engine type, or measured experimentally, that is, when the engine is unloaded, the moment of inertia is estimated by measuring the response time of the speed change. The equivalent interference torque refers to the torque effect of all external interferences (intake system, fuel system, accessory changes, etc.) on the engine speed, which is uniformly converted into an equivalent torque value for easy processing by the control system.

[0095] In a feasible implementation manner, before step S401, the method further includes:

[0096] Step B10: Obtain vehicle interference information.

[0097] It should be noted that vehicle interference information refers to unstable factors when the engine is idling. Vehicle interference information includes but is not limited to changes in the intake system (such as changes in the throttle and intake volume), abnormalities in the fuel system (such as injector failure, fuel pressure fluctuations, carbon deposits in the injection volume), and sudden changes in accessories (such as starting the air-conditioning compressor, activation of the power steering device, etc.).

[0098] Step B20: converting the vehicle interference information into equivalent interference torque according to a preset conversion rule.

[0099] It should be noted that after obtaining the vehicle interference information, the system will convert this information into an equivalent interference torque value through a preset conversion rule. Specifically, according to the characteristics of the engine and accessories and experimental data, a set of conversion rules for converting vehicle interference information into equivalent interference torque is pre-set. These rules may include the corresponding torque change when different accessories are started or shut down, the corresponding relationship between engine speed and torque under different working conditions, etc. Then, the obtained vehicle interference information is used as input, and the preset conversion rules are applied for calculation to obtain the corresponding equivalent interference torque value.

[0100] Step S402: Obtaining the engine speed change rate according to the braking torque, the load torque and the engine rotational inertia.

[0101] It should be noted that, specifically, the engine speed model is shown in the following formula 4:

[0102]

[0103] Where J is the engine moment of inertia, dN / dt is the rate of change of engine speed, T e is the engine braking torque, T l is the engine load torque. For example, the execution process of a specific scenario is as follows: Assume that the engine is currently in a stable idle state, and the braking torque and load torque are balanced. At this time, if a sudden increase in load torque is detected (such as when the air conditioner is turned on), the control system will immediately calculate how the speed will change based on the new load torque value and the known moment of inertia, and adjust the control strategy accordingly to maintain idle stability. In addition, it should be noted that the engine speed change rate indicates how fast the engine speed changes over time, and is an important indicator reflecting the dynamic performance of the engine.

[0104] Step S403: Controlling the engine idle speed according to the engine speed change rate, the corrected disturbance torque, the equivalent disturbance torque and the idle speed control torque.

[0105] It should be noted that in this step, the control system will adjust the electronic throttle opening, fuel injection amount and timing and other control parameters through the feedback controller (such as PID controller) according to the engine speed change rate, the modified interference torque and equivalent interference torque estimated by the interference observer, and the preset idle control torque to achieve precise control of the engine idle speed. Specifically, the system will adjust the control parameters accordingly according to the estimated results of the interference torque in real time to offset the impact of external interference on idle stability.

[0106] In a feasible implementation manner, the step S403 specifically includes:

[0107] Step C10: obtaining a target control speed according to the engine speed change rate, the corrected disturbance torque, the equivalent disturbance torque and the idle control torque control.

[0108] It should be noted that in this step, the control system will input the adjusted idle control torque, engine speed change rate, corrected interference torque and equivalent interference torque into the engine speed model, and obtain the target control speed that can offset the influence of external interference through the calculation of the model. The target control speed takes into account the current state of the engine, external load and future change trends, aiming to achieve more stable and accurate idle control.

[0109] Step C20: Controlling the engine idle speed according to the target control speed.

[0110] It should be noted that if Figure 5 , Figure 6 As shown in the figure, the system can be applied to the idle speed control process of two different engines, diesel and gasoline engines. In this step, the system adjusts the control parameters of the electronic throttle control module and the injection system control module or the ignition coil control module according to the target control speed. Specifically, the target throttle opening and the target injection amount and the parameters such as timing, rail pressure or ignition advance angle are adjusted so that the output torque of the engine (which can be a diesel engine or a gasoline engine) can match the requirements of the target control speed. Then the adjusted control parameters are sent to the corresponding actuators (such as electronic throttle and injector or ignition coil) to perform the corresponding control operations. By accurately controlling the opening of the electronic throttle and the injection amount of the injection system and the parameters such as timing, rail pressure or ignition advance angle, the engine can quickly respond to changes in the target control speed.

[0111] It can be understood that the role of this step is to accurately control the idle speed of the engine according to the target control speed. By adjusting the control parameters and executing the control operation in real time, the engine can quickly respond to changes in the external load and maintain the stability and accuracy of the idle speed.

[0112] In this embodiment, by comprehensively considering the engine speed change rate, the corrected disturbance torque, the equivalent disturbance torque and the idle control torque, a target control speed that can overcome the influence of external disturbances is calculated. The engine idle speed is controlled according to the target control speed, thereby improving the stability and accuracy of the engine idle speed and thus enhancing driving comfort.

[0113] This application also provides an engine idle speed control device, please refer to Figure 7 , the engine idle speed control device comprises:

[0114] An information acquisition module 10 is used for the engine's braking torque, load torque, target idle speed, and actual engine speed;

[0115] An information processing module 20, configured to perform feedback control processing according to the target idle speed and the actual engine speed to obtain an idle control torque;

[0116] An interference correction module 30, configured to obtain a corrected interference torque according to the actual engine speed and the idle control torque;

[0117] The idle speed control module 40 is configured to control the engine idle speed based on the brake torque, the load torque, the corrected disturbance torque and the idle speed control torque.

[0118] The engine idle speed control device provided by the present application adopts the engine idle speed control method in the above embodiment, and can solve the technical problem of how to reduce the influence of interference factors on idle speed control. Compared with the prior art, the beneficial effects of the engine idle speed control device provided by the present application are the same as the beneficial effects of the engine idle speed control method provided by the above embodiment, and other technical features in the engine idle speed control device are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0119] The present application provides an engine idle speed control device, which includes: at least one processor; and a memory that is communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the engine idle speed control method in the above-mentioned embodiment one.

[0120] Reference below Figure 8, which shows a schematic diagram of the structure of an engine idle speed control device suitable for implementing the embodiment of the present application. The engine idle speed control device in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 8 The engine idle speed control device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0121] like Figure 8 As shown, the engine idle speed control device may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the engine idle speed control device are also stored. The processing device 1001, ROM1002, and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. Communication device 1009 can allow the engine idle speed control device to communicate wirelessly or wired with other devices to exchange data. Although the figure shows an engine idle speed control device with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or have alternatively.

[0122] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0123] The engine idle speed control device provided by the present application adopts the engine idle speed control method in the above embodiment, which can solve the technical problem of how to reduce the influence of interference factors on idle speed control. Compared with the prior art, the beneficial effects of the engine idle speed control device provided by the present application are the same as the beneficial effects of the engine idle speed control method provided by the above embodiment, and other technical features in the engine idle speed control device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0124] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0125] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0126] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the engine idle speed control method in the above-mentioned embodiment.

[0127] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0128] The computer-readable storage medium may be included in the engine idle speed control device; or may exist independently without being assembled into the engine idle speed control device.

[0129] The above-mentioned computer-readable storage medium carries one or more programs. When the above-mentioned one or more programs are executed by the engine idle control device, the engine idle control device: obtains the engine's braking torque, load torque, target idle speed and actual engine speed; performs feedback control processing according to the target idle speed and the actual engine speed to obtain the idle control torque; obtains the corrected interference torque according to the actual engine speed and the idle control torque; and controls the engine idle speed based on the braking torque, the load torque, the corrected interference torque and the idle control torque.

[0130] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0131] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0132] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0133] The readable storage medium provided by the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned engine idle speed control method, and can solve the technical problem of how to reduce the influence of interference factors on idle speed control. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the present application are the same as the beneficial effects of the engine idle speed control method provided by the above-mentioned embodiment, and will not be repeated here.

[0134] The present application also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the steps of the engine idle speed control method as described above are implemented.

[0135] The computer program product provided by the present application can solve the technical problem of how to reduce the influence of interference factors on idle speed control. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the engine idle speed control method provided by the above embodiment, which will not be repeated here.

[0136] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. An engine idle speed control method, characterized in that: The method comprises: Obtain the engine's brake torque, load torque, target idle speed, and actual engine speed; Performing feedback control processing according to the target idle speed and the actual engine speed to obtain an idle control torque; obtaining a corrected interference torque according to the actual engine speed and the idle speed control torque; An engine idle speed is controlled based on the brake torque, the load torque, the correction disturbance torque, and the idle speed control torque.

2. The method according to claim 1, characterized in that The step of performing feedback control processing according to the target idle speed and the actual engine speed to obtain the idle control torque comprises: Obtaining a deviation speed according to the target idle speed and the actual engine speed; Feedback control is performed on the deviation speed to obtain an idle speed control torque.

3. The method according to claim 1, characterized in that The step of obtaining the corrected interference torque according to the actual engine speed and the idle control torque comprises: Performing nominal inverse processing on the actual engine speed to obtain an actual control torque; The idle control torque and the actual control torque are subjected to low-pass filtering to obtain a corrected interference torque.

4. The method according to claim 3, characterized in that The step of performing low-pass filtering on the idle control torque and the actual control torque to obtain a corrected interference torque comprises: Obtaining a deviation control torque according to the idle speed control torque and the actual control torque; The deviation control torque is subjected to low-pass filtering to obtain a corrected interference torque.

5. The method according to claim 1, characterized in that The step of controlling the engine idle speed based on the brake torque, the load torque, the corrected disturbance torque and the idle speed control torque comprises: Obtain engine rotational inertia and equivalent disturbance torque; Obtaining an engine speed change rate according to the braking torque, the load torque and the engine rotational inertia; The engine idle speed is controlled according to the engine speed change rate, the corrected disturbance torque, the equivalent disturbance torque, and the idle speed control torque.

6. The method according to claim 5, characterized in that The step of controlling the engine idle speed according to the engine speed change rate, the corrected disturbance torque, the equivalent disturbance torque and the idle speed control torque comprises: Obtaining a target control speed according to the engine speed change rate, the corrected disturbance torque, the equivalent disturbance torque and the idle control torque control; The engine idle speed is controlled according to the target control speed.

7. The method according to claim 5, characterized in that Before obtaining the engine moment of inertia and equivalent disturbance torque, the method further includes: Obtain vehicle interference information; The vehicle interference information is converted into an equivalent interference torque according to a preset conversion rule.

8. An engine idle speed control device, characterized in that: The device comprises: An information acquisition module for the engine's brake torque, load torque, target idle speed, and actual engine speed; An information processing module, configured to perform feedback control processing according to the target idle speed and the actual engine speed to obtain an idle control torque; An interference correction module, used for obtaining a corrected interference torque according to the actual engine speed and the idle control torque; The idle speed control module is configured to control the engine idle speed based on the brake torque, the load torque, the corrected disturbance torque and the idle speed control torque.

9. An engine idle speed control device, characterized in that: The device comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the engine idle speed control method according to any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the engine idle speed control method according to any one of claims 1 to 7 are implemented.

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