A control method and device for preventing diesel engine combined parking and electronic equipment

Abstract

The application discloses a control method and device for preventing diesel engine combined parking and electronic equipment, and belongs to the technical field of diesel engine control, and comprises the following steps: after receiving a combined parking request signal, the current speed of the diesel engine is acquired; according to a preset corresponding relationship between the speed and the maximum limited fuel quantity, the maximum limited fuel quantity corresponding to the speed of the diesel engine is determined; the maximum limited fuel quantity is corrected by using a fuel quantity correction coefficient to obtain a maximum set fuel quantity; and the fuel supply quantity of the diesel engine is the maximum set fuel quantity. By using the fuel quantity correction coefficient to amplify the limitation of the combined parking fuel quantity, the fuel supply quantity during combined parking is increased, the speed reduction after the sudden load of the diesel engine is reduced, the situation that the cylinder cannot be ignited due to the low speed is avoided, and the diesel engine is prevented from being stalled.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of diesel engine control, and particularly relates to a control method and device for preventing diesel engine from parking after combined output and electronic equipment. BACKGROUND

[0002] A marine diesel engine power system generally comprises a diesel engine, a marine gearbox, a transmission shaft and a propeller. The diesel engine provides a power source, one end of the transmission shaft is connected to the propeller, and the other end is connected to the gearbox to transmit power to the propeller. The propeller is the final output unit of power, and the rotation of the propeller blades in water can generate thrust to drive the ship to move forward / backward. The marine gearbox is responsible for connecting the diesel engine and the transmission shaft, one end of which is kept in a connected state with the transmission shaft; the other end is in a disengaged state with the diesel engine when power output is not required; when power output is required, the diesel engine output shaft and the transmission shaft are connected together through the pressure of hydraulic oil in the gearbox, and this process is called combined output. The process of combined output is to transmit the power provided by the diesel engine to the propeller step by step through the gearbox and the transmission shaft.

[0003] The marine diesel engine is generally combined at a low speed close to idle speed, and a large load is suddenly added to the diesel engine when the combined output action is performed. If the diesel engine cannot supply enough oil due to oil quantity limitation, the diesel engine speed will decrease, and the diesel engine will stall when the speed decreases to a certain value because the cylinder cannot be ignited. SUMMARY

[0004] The technical problem to be solved by the application is to provide a control method, device and electronic equipment for preventing diesel engine from parking after combined output, which can increase the combined output oil quantity and improve the combined output responsiveness.

[0005] To solve the above technical problems, the technical scheme of the application is as follows:

[0006] A control method for preventing diesel engine from parking after combined output comprises the following steps: after receiving a combined output request signal, obtaining the current speed of the diesel engine; determining the maximum limited oil quantity corresponding to the current speed of the diesel engine according to a preset correspondence between speed and maximum limited oil quantity; correcting the maximum limited oil quantity by using an oil quantity correction coefficient to obtain a maximum set oil quantity; and the oil supply quantity of the diesel engine is the maximum set oil quantity.

[0007] Further, the maximum set oil quantity is the product of the maximum limited oil quantity and the oil quantity correction coefficient.

[0008] Further, the oil quantity correction coefficient is 1-1.5.

[0009] Further, the rotation speed of the diesel engine is monitored in real time, and when the rotation speed of the diesel engine is below the minimum running rotation speed of the diesel engine, a disengagement request is sent to the diesel engine, and the fuel supply amount of the diesel engine is restored to the maximum limited fuel supply amount corresponding to the current rotation speed of the diesel engine.

[0010] Further, when the rotation speed of the diesel engine is restored to the preset successful engagement rotation speed, the fuel supply amount of the diesel engine is restored to the maximum limited fuel supply amount corresponding to the current rotation speed of the diesel engine; if the rotation speed of the diesel engine is not restored to the successful engagement rotation speed, the fuel supply amount of the diesel engine is maintained unchanged at the maximum set fuel supply amount.

[0011] Further, the successful engagement rotation speed is a preset multiple of the engagement set rotation speed of the diesel engine.

[0012] Further, the minimum running rotation speed of the diesel engine is 0.5 times the engagement set rotation speed of the diesel engine.

[0013] Further, after receiving the engagement request signal, the fuel supply amount of the diesel engine is restored to the maximum limited fuel supply amount corresponding to the current rotation speed of the diesel engine after a preset time delay.

[0014] A control device for preventing the diesel engine from engaging and stopping, comprising:

[0015] A communication module for obtaining an engagement request signal sent by a gearbox control box or sending a disengagement request signal to the gearbox control box;

[0016] A determination module for obtaining the rotation speed of the diesel engine after receiving the engagement request signal, and determining the maximum limited fuel supply amount corresponding to the current rotation speed of the diesel engine according to a preset corresponding relationship between the rotation speed and the maximum limited fuel supply amount, and correcting the maximum limited fuel supply amount by a fuel supply correction coefficient to obtain a maximum set fuel supply amount;

[0017] A control module for controlling the diesel engine by taking the maximum set fuel supply amount as the fuel supply amount, and controlling the diesel engine to disengage, maintain the maximum set fuel supply amount, or restore the maximum limited fuel supply amount according to the real-time detected rotation speed of the diesel engine.

[0018] An electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the control method when executing the computer program.

[0019] After the above technical scheme is adopted, the present application has the following beneficial effects:

[0020] The control method for preventing diesel engine from stopping by combined discharge disclosed in the present application amplifies the limit of combined discharge fuel quantity by using fuel quantity correction coefficient, increases fuel quantity during combined discharge, reduces the speed after sudden load of diesel engine, avoids the situation that cylinder cannot be ignited due to low speed, and prevents diesel engine from stopping.

[0021] In the present application, when the combined discharge speed is too low, the combined discharge request can be sent in time to further prevent the diesel engine from stopping.

[0022] In the present application, after the combined discharge request signal is received for more than a preset time, the fuel quantity of the diesel engine returns to the normal value, and whether the combined discharge is successful or not, the fuel quantity amplification state is exited, which can prevent the situation that the diesel engine smokes black due to long-time combined discharge failure and fuel quantity amplification, and reduce the risk. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural schematic diagram of the control method for preventing diesel engine from stopping by combined discharge of the present application. DETAILED DESCRIPTION

[0024] The present application will be further described below in combination with the drawings and embodiments, and the preferred embodiments of the present application are shown in the drawings, and the drawings are used to supplement the description in the text part of the description, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the present application, but it cannot be understood as a limitation on the protection scope of the present application.

[0025] Embodiment one:

[0026] As shown in Figure 1 A control method for preventing diesel engine from stopping by combined discharge, comprising the following steps:

[0027] S2, after receiving the combined discharge request signal S1 sent by the gear box control box, the combined discharge fuel quantity is increased.

[0028] The execution subject of the present embodiment can be an electronic control unit ECU of the diesel engine, the electronic control unit ECU can monitor the operating condition of the diesel engine, obtain the speed of the diesel engine, and can communicate with the gear box control box to receive and send combined discharge and discharge request signals.

[0029] The specific calculation method of the increased fuel quantity Q includes:

[0030] S201, obtaining the current speed N of the diesel engine.

[0031] S202, according to the preset corresponding relationship between speed and maximum limit fuel quantity, the maximum limit fuel quantity Q1 corresponding to the current speed N of the diesel engine is determined.

[0032] S203, correct the maximum limit oil quantity Q1 using the oil quantity correction coefficient K1 to obtain the maximum set oil quantity Q2.

[0033] Wherein, the maximum set oil quantity Q2 is the product of the maximum limit oil quantity Q1 and the oil quantity correction coefficient K1, that is, the maximum set oil quantity Q2 = Q1*K1, the oil quantity correction coefficient K is 1-1.5, and in the embodiment, preferably K1 = 1.1.

[0034] S203, the oil supply quantity Q of the diesel engine is the maximum set oil quantity Q2, that is, Q = Q1*K1. By increasing the oil supply quantity during the combined discharge, the limitation of the combined discharge quantity is amplified, which can reduce the reduced speed after the diesel engine suddenly increases the load, avoid the situation that the diesel engine cannot be ignited due to the low speed, and prevent the diesel engine from stalling.

[0035] S3, the speed N of the diesel engine is monitored in real time, and when the speed N of the diesel engine is below the minimum running speed Nmin allowed by the diesel engine, that is, N≤Nmin, a discharge request is sent to the diesel engine, to prevent the diesel engine from being extinguished and stopped due to the low speed.

[0036] At this time, the oil supply quantity Q of the diesel engine returns to the maximum limit oil quantity Q1 corresponding to the current speed N of the diesel engine.

[0037] S4, when the speed N of the diesel engine returns to the preset combined discharge success speed N2, that is, N≥N2, at this time, the diesel engine completes the combined discharge, the speed N of the diesel engine also rises to a suitable value, the oil supply quantity Q of the diesel engine returns to the maximum limit oil quantity Q1 corresponding to the current speed N of the diesel engine, and Q = Q1.

[0038] But if the speed N of the diesel engine does not return to the combined discharge success speed N2, that is, N<N2, the diesel engine has not completed the combined discharge, or the combined discharge is completed but the speed is low, at this time, a larger oil supply is still needed to quickly restore the speed, then the oil supply quantity Q of the diesel engine remains unchanged at the maximum set oil quantity Q2, that is, Q = Q2.

[0039] Wherein, the combined discharge success speed N2 is the combined discharge set speed N1 of the diesel engine with a preset multiple K2, that is, N2 = K2*N1. The combined discharge set speed N1 is the speed value of the diesel engine during the combined discharge, which is the combined discharge speed preset by the diesel engine according to different types, generally between 300-500r / mim.

[0040] Therefore, the judgment condition for the completion of the combined discharge of the diesel engine is N≥K2*N1.

[0041] Wherein, the preset multiple K2 is 0.95-0.98, and in the embodiment, preferably K2 = 0.95.

[0042] Further preferably, the minimum running speed Nmin allowed by the diesel engine is 0.5 times the combined discharge set speed N1, that is, Nmin = 0.5*N1.

[0043] S5, after receiving the combined request signal S1, the oil supply is amplified, Q=Q*K1, the timing T is started, after the delay preset time T1, that is, T≥T1, the oil supply Q of the diesel engine is restored to the maximum limit oil amount Q1 corresponding to the current speed N of the diesel engine, Q=Q1. At this time, whether the combined is successful or not, the oil supply amplification state will be exited, which can prevent the diesel engine from smoking black smoke and other situations caused by long-time combined failure and oil supply in the amplification state.

[0044] Among them, the preset time T1 is 30s-60s, and in the embodiment, T1=40s is preferred.

[0045] Example two:

[0046] The application also protects a control device for preventing diesel engine combined parking, which can be realized by software, hardware or a combination of software and hardware. For example, the control device can include integrated or separate functional modules or units to perform the corresponding steps in the methods of example one. Since the device embodiments of the present embodiment are basically similar to the method embodiments of example one, the description is relatively simple, and the relevant parts can be referred to the part of the method embodiments. The device embodiments described below are only illustrative.

[0047] A control device for preventing diesel engine combined parking, comprising:

[0048] A communication module for obtaining the combined request signal sent by the gearbox control box, or sending the combined request signal to the gearbox control box;

[0049] A determination module for obtaining the speed of the diesel engine after receiving the combined request signal, and determining the maximum limit oil amount corresponding to the current speed of the diesel engine according to the preset corresponding relationship between the speed and the maximum limit oil amount, and correcting the maximum limit oil amount by the oil amount correction coefficient to obtain the maximum set oil amount;

[0050] A control module for controlling the diesel engine with the maximum set oil amount as the oil supply, and controlling the diesel engine to be combined, maintained at the maximum set oil amount or restored to the maximum limit oil amount according to the real-time detected speed of the diesel engine.

[0051] Example three:

[0052] The application also protects an electronic device corresponding to the control method for preventing diesel engine combined parking provided in example one, which can be a vehicle ECU, a mobile phone, a notebook computer, a tablet computer, a desktop computer, etc., to execute the control method of example one.

[0053] An electronic device includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor implements the control method in Embodiment I when executing the computer program.

[0054] The control method and device for preventing diesel engine from stopping during combined discharge and the electronic device of the present application can enlarge the limit of the combined discharge oil quantity by using the oil quantity correction coefficient during the combined discharge of the diesel engine, increase the oil supply quantity during the combined discharge, reduce the rotating speed after the sudden load of the diesel engine, and avoid the situation that the ignition in the cylinder cannot be achieved due to the low rotating speed, the control logic is simple and easy to realize, the combined discharge responsiveness can be effectively improved, and the diesel engine can be prevented from stopping during the combined discharge.

[0055] In the description of the present specification, greater than, less than, more than, and the like are understood as not including the number, and above, below, and the like are understood as including the number.

[0056] In the description of the present specification, unless otherwise explicitly limited, the words "set", "install", "connect", and the like should be understood in a broad sense, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0057] Although the specific embodiments of the present application are described above, those skilled in the art should understand that the described embodiments are only part of the embodiments of the present application, not all the embodiments, which are only illustrative, and the protection scope of the present application is defined by the claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, and without any creative labor, but these changes and modifications all fall within the protection scope of the present application.

Claims

1. A control method for preventing a diesel engine from stopping in a combined state, characterized by, The method comprises: After receiving the request signal, the current speed of the diesel engine is obtained; According to the preset correspondence between the speed and the maximum limited fuel quantity, the maximum limited fuel quantity corresponding to the current speed of the diesel engine is determined; The maximum limited fuel quantity is corrected by using a fuel quantity correction coefficient to obtain a maximum set fuel quantity; The fuel quantity supplied to the diesel engine is the maximum set fuel quantity.

2. The control method of preventing the diesel engine from stopping by the combined decoupling according to claim 1, characterized by, The maximum set fuel quantity is the product of the maximum limited fuel quantity and the fuel quantity correction coefficient.

3. The control method of preventing the diesel engine from stopping in a combined state according to claim 2, characterized by, The fuel quantity correction coefficient is 1-1.

5.

4. The control method of preventing the diesel engine from stopping by the combined decoupling according to claim 1, characterized by, The speed of the diesel engine is monitored in real time, and when the speed of the diesel engine is below the minimum running speed of the diesel engine, a request signal for disengagement is sent to the diesel engine, and the fuel quantity supplied to the diesel engine is restored to the maximum limited fuel quantity corresponding to the current speed of the diesel engine.

5. The control method of preventing the diesel engine from stopping in a combined state according to claim 4, characterized by, When the speed of the diesel engine is restored to the preset successful engagement speed, the fuel quantity supplied to the diesel engine is restored to the maximum limited fuel quantity corresponding to the current speed of the diesel engine; if the speed of the diesel engine is not restored to the successful engagement speed, the fuel quantity supplied to the diesel engine is maintained at the maximum set fuel quantity.

6. The control method of preventing the diesel engine from stopping in a combined state according to claim 5, characterized by, The successful engagement speed is a preset multiple of the engagement set speed of the diesel engine.

7. The control method of preventing the diesel engine from stopping in a combined state according to claim 6, characterized by, The minimum running speed of the diesel engine is 0.5 times the engagement set speed of the diesel engine.

8. The control method of preventing the diesel engine from stopping in a combined state according to any one of claims 1 to 7, characterized by, After receiving the request signal, the fuel quantity supplied to the diesel engine is restored to the maximum limited fuel quantity corresponding to the current speed of the diesel engine after a preset time delay.

9. A control device for preventing a diesel engine from stopping with a combined exhaust, characterized by comprising: a control unit which controls the engine to stop the engine when the engine is stopped with the combined exhaust. The method comprises: A communication module is configured to obtain an engagement request signal sent by a gear box control box or send a disengagement request signal to the gear box control box; A determination module is configured to obtain the speed of a diesel engine after receiving the request signal, and determine the maximum limited fuel quantity corresponding to the current speed of the diesel engine according to a preset correspondence between the speed and the maximum limited fuel quantity, and correct the maximum limited fuel quantity by using a fuel quantity correction coefficient to obtain a maximum set fuel quantity; A control module is configured to control the diesel engine by using the maximum set fuel quantity as the fuel quantity, and control the diesel engine to disengage, maintain the maximum set fuel quantity, or restore the maximum limited fuel quantity according to the real-time detected speed of the diesel engine.

10. An electronic device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the control method of any one of claims 1-8 when executing the computer program.

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