Engine control method and related device

Abstract

The application discloses an engine control method and related device, and relates to the field of engines, and comprises the following steps: when the engine starts successfully, determining the reference temperature of the external characteristic oil quantity correction coefficient according to the key temperature parameter of the engine; when the reference temperature is less than the preset correction temperature threshold value, determining the initial external characteristic correction oil quantity based on the reference temperature and the correction temperature threshold value; determining the final target external characteristic correction oil quantity based on the size relationship between the initial external characteristic correction oil quantity and the upper limit threshold value and the lower limit threshold value of the external characteristic oil quantity; when the generator set is loaded instantaneously, controlling the engine to perform the fuel injection operation according to the target external characteristic correction oil quantity in the cold state. In the application, the upper limit threshold value and the lower limit threshold value of the external characteristic oil quantity can be dynamically adjusted in coordination when simulating low temperature, so that the external characteristic oil quantity can be dynamically corrected in real time, and the rapid loading capacity of the engine in the cold state and the transient response characteristic of the generator set are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engine control, more particularly, to an engine control method and related device. BACKGROUND

[0002] At present, the data center of the Internet and communication industry usually uses a generator set as a standby power supply. When the generator set is loaded instantaneously, the performance index of the engine used by the generator set is very high, and the engine is usually required to be able to stably operate after loading a certain load in a cold state (for example, the data center usually heats water, and the water temperature and oil temperature are about 25-30℃ at this time).

[0003] When the engine starts in a cold state, due to large friction work, when a large load is loaded instantaneously, the engine may not be able to load to the target load due to the limitation of the fixed oil supply of the external characteristic, and the speed recovery time is too long, which easily causes under-frequency shutdown, and even causes the engine to stall. SUMMARY

[0004] Therefore, the present application discloses an engine control method and related device to improve the rapid loading capacity of the engine when starting in a cold state under the premise of ensuring the reliability of the engine, so that the engine can be quickly loaded to the target load; and improve the transient response characteristics of the generator set, and effectively avoid the occurrence of under-frequency shutdown, stalling and other situations caused by the limitation of the fixed oil supply of the external characteristic in the traditional technology.

[0005] An engine control method, comprising:

[0006] When the engine starts successfully, a reference temperature of an external characteristic oil amount correction coefficient is determined according to a key temperature parameter of the engine;

[0007] When the reference temperature is less than a preset correction temperature threshold, an initial external characteristic correction oil amount is determined based on the reference temperature and the correction temperature threshold;

[0008] Based on the size relationship between the initial external characteristic correction oil amount and an upper limit threshold and a lower limit threshold of the external characteristic oil amount, a final target external characteristic correction oil amount is determined, wherein the upper limit threshold and the lower limit threshold of the external characteristic oil amount are dynamically determined based on the engine speed, and are dynamically adjusted by simulating a low temperature environment;

[0009] When the generator set is loaded instantaneously, the engine is controlled to perform a fuel injection operation in a cold state according to the target external characteristic correction oil amount.

[0010] Optionally, when the reference temperature is less than the preset correction temperature threshold, the initial external characteristic correction oil amount is determined based on the reference temperature and the correction temperature threshold, comprising:

[0011] Determine the original external characteristic oil quantity corresponding to the current engine speed;

[0012] The first external characteristic correction oil quantity coefficient is determined based on the reference temperature and the correction temperature threshold.

[0013] The original external characteristic oil quantity is corrected using the first external characteristic correction oil quantity coefficient to obtain the initial external characteristic correction oil quantity.

[0014] Optionally, the process of determining the first external characteristic correction oil quantity coefficient based on the reference temperature and the correction temperature threshold includes:

[0015] A 温度 =1+k·(T_ 修正温度阈值 -T_ 参考温度 ) / T_ 修正温度阈值 ;

[0016] In the formula, A 温度 T_ represents the first external characteristic correction coefficient for oil quantity. 修正温度阈值 The corrected temperature threshold, T_, is determined based on different engine models. 参考温度 The reference temperature is represented by k, and the engine type coefficient is represented by k.

[0017] Optionally, the process of determining the final target external characteristic correction oil quantity based on the relationship between the initial external characteristic correction oil quantity and the upper and lower limits of the external characteristic oil quantity includes:

[0018] If the initial external characteristic correction oil quantity is not less than the upper limit threshold of the external characteristic oil quantity, the upper limit threshold of the external characteristic oil quantity shall be determined as the target external characteristic correction oil quantity;

[0019] If the initial external characteristic correction oil quantity is not greater than the lower limit threshold of the external characteristic oil quantity, the lower limit threshold of the external characteristic oil quantity is determined as the target external characteristic correction oil quantity;

[0020] If the initial external characteristic correction oil quantity is greater than the lower limit threshold of the external characteristic oil quantity and less than the upper limit threshold of the external characteristic oil quantity, the initial external characteristic correction oil quantity is determined as the target external characteristic correction oil quantity.

[0021] Optionally, the process of determining the upper limit threshold of the external characteristic oil quantity includes:

[0022] Determine the original external characteristic oil quantity corresponding to the current engine speed;

[0023] In the external characteristic oil quantity correction coefficient curve of the fatigue limit of engine materials, determine the reliability external characteristic oil quantity correction coefficient corresponding to the current engine speed;

[0024] The original external characteristic oil quantity is corrected by using the reliability external characteristic oil quantity correction coefficient to obtain the upper limit threshold of the external characteristic oil quantity.

[0025] Optionally, the determination process of the lower limit threshold of the external characteristic oil quantity comprises:

[0026] determining the original external characteristic oil quantity corresponding to the current engine speed;

[0027] In the external characteristic oil quantity correction coefficient curve obtained when the cold-state 0-100% transient loading is successful, the second external characteristic oil quantity correction coefficient corresponding to the current engine speed is determined;

[0028] The original external characteristic oil quantity is corrected by using the second external characteristic oil quantity correction coefficient to obtain the lower limit threshold of the external characteristic oil quantity.

[0029] Optionally, the reference temperature for determining the external characteristic oil quantity correction coefficient according to the key temperature parameter of the engine after the engine starts successfully comprises:

[0030] obtaining the key temperature parameter of the engine, wherein the key temperature parameter of the engine comprises an engine water outlet temperature, a turbine front exhaust temperature, an engine oil temperature, and a post-intercooler intake air temperature;

[0031] converting the turbine front exhaust temperature according to a preset proportion to obtain a target turbine front exhaust temperature;

[0032] selecting a minimum temperature value from the engine water outlet temperature, the target turbine front exhaust temperature, the engine oil temperature, and the post-intercooler intake air temperature;

[0033] determining the minimum temperature value as the reference temperature.

[0034] Optionally, the method further comprises:

[0035] starting timing while controlling the engine to perform fuel injection operation according to the target external characteristic correction oil quantity in the cold state;

[0036] controlling the engine to switch to perform fuel injection operation according to the original external characteristic oil quantity when the timing time reaches a maximum allowed time threshold.

[0037] An engine control device comprises:

[0038] a reference temperature determination unit configured to determine a reference temperature for an external characteristic oil quantity correction coefficient according to a key temperature parameter of an engine after the engine starts successfully;

[0039] an initial correction oil quantity determination unit configured to determine an initial external characteristic correction oil quantity based on the reference temperature and a correction temperature threshold when the reference temperature is less than the correction temperature threshold.

[0040] The final corrected fuel quantity determination unit is used to determine the final target external characteristic corrected fuel quantity based on the relationship between the initial external characteristic corrected fuel quantity and the upper limit threshold and lower limit threshold of the external characteristic fuel quantity. The upper limit threshold and the lower limit threshold of the external characteristic fuel quantity are both dynamically determined based on the engine speed and dynamically adjusted by simulating a low temperature environment.

[0041] The control unit is used to control the engine to perform fuel injection operations in a cold state according to the target external characteristics when the generator set is under transient load.

[0042] An electronic device, comprising: a memory and a processor;

[0043] The memory is used to store at least one instruction;

[0044] The processor is used to execute the at least one instruction to implement any engine control method.

[0045] A computer storage medium storing at least one instruction that, when executed by a processor, implements any engine control method.

[0046] As can be seen from the above technical solution, this invention discloses an engine control method and related devices. After the engine starts successfully, a reference temperature for the external characteristic fuel quantity correction coefficient is determined based on the engine's key temperature parameters. When the reference temperature is less than a preset correction temperature threshold, an initial external characteristic correction fuel quantity is determined based on the reference temperature and the correction temperature threshold. Based on the relationship between the initial external characteristic correction fuel quantity and the upper and lower limits of the external characteristic fuel quantity, the final target external characteristic correction fuel quantity is determined. When the generator set is subjected to transient loading, the engine is controlled to perform fuel injection operations according to the target external characteristic correction fuel quantity in a cold state. In this invention, the upper and lower limits of the external characteristic fuel quantity can be dynamically and collaboratively adjusted under simulated low-temperature environmental conditions. This allows for real-time dynamic correction of the external characteristic fuel quantity based on the adjusted dual threshold range, thereby improving the engine's rapid loading capability during cold starts while ensuring engine reliability, enabling it to quickly load to the target load. Simultaneously, it improves the transient response characteristics of the generator set, effectively avoiding under-frequency shutdowns and stalls caused by fixed external characteristic fuel supply limitations in traditional technologies. Attached Figure Description

[0047] In order to make the technical solutions of the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only aim to explain the embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative effort based on the disclosed drawings.

[0048] Figure 1 Flow chart of the engine control method disclosed in the embodiments of the present application;

[0049] Figure 2 Flow chart of the engine control method in one specific embodiment of the present application;

[0050] Figure 3 Structural schematic diagram of the engine control device disclosed in the embodiments of the present application;

[0051] Figure 4 Structural schematic diagram of the electronic device disclosed in the embodiments of the present application. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the protection scope of the present application.

[0053] Related term explanation

[0054] External characteristic working condition: the running state of the engine in the full throttle state, corresponding to the maximum output power or torque at each speed.

[0055] External characteristic fuel quantity: the fuel quantity injected by the engine control unit (ECU) into the cylinder in the external characteristic working condition.

[0056] The embodiment of the application discloses an engine control method and related device, when the engine starts successfully, the reference temperature of the external characteristic oil quantity correction coefficient is determined according to the key temperature parameter of the engine, when the reference temperature is less than the preset correction temperature threshold, the initial external characteristic correction oil quantity is determined based on the reference temperature and the correction temperature threshold, the final target external characteristic correction oil quantity is determined based on the size relationship between the initial external characteristic correction oil quantity and the upper limit threshold and the lower limit threshold of the external characteristic oil quantity, when the generator set is loaded instantaneously, the engine is controlled to perform the fuel injection operation according to the target external characteristic correction oil quantity in the cold state. In the application, the upper limit threshold and the lower limit threshold of the external characteristic oil quantity can be dynamically adjusted in the simulated low-temperature environment condition, so that the external characteristic oil quantity can be dynamically corrected based on the adjusted double threshold range, the rapid loading capacity of the engine in the cold state is improved when starting, the engine can be rapidly loaded to the target load, the transient response characteristics of the generator set are improved, and the under-frequency shutdown and flameout in the traditional technology are avoided.

[0057] Referring to Figure 1 The embodiment of the application discloses an engine control method flow chart, the method is applied to an engine control unit, and the method comprises the following steps:

[0058] Step S101, when the engine starts successfully, the reference temperature of the external characteristic oil quantity correction coefficient is determined according to the key temperature parameter of the engine.

[0059] When the engine is powered on, the engine control unit detects the running state of the engine, if it is determined that the engine starts successfully according to the running state of the engine, the engine control unit obtains the key temperature parameter of the engine, and the reference temperature of the external characteristic oil quantity correction coefficient is determined according to the key temperature parameter of the engine.

[0060] The key temperature parameter of the engine includes but is not limited to the engine water outlet temperature, the pre-turbine exhaust temperature, the oil temperature and the inter-cooled intake air temperature.

[0061] When the engine control unit determines that the engine does not start successfully according to the running state of the engine, the engine control unit determines the corresponding original external characteristic oil quantity Q_base according to the current engine speed, and controls the engine to perform the fuel injection operation according to Q_base.

[0062] Step S102, when the reference temperature is less than the preset correction temperature threshold, the initial external characteristic correction oil quantity is determined based on the reference temperature and the correction temperature threshold.

[0063] When the reference temperature is less than the preset correction temperature threshold, it is determined that the current engine operating condition satisfies the correction activation condition of the cold-state external characteristic oil amount, and at this time, the initial external characteristic correction oil amount is determined based on the reference temperature and the correction temperature threshold.

[0064] The determination process of the initial external characteristic correction oil amount can specifically include:

[0065] 1) Determine the original external characteristic oil amount Q_base corresponding to the current engine speed.

[0066] In actual application, the external characteristic oil amount corresponding to the current engine speed can be found from the existing external characteristic oil amount curve as the original external characteristic oil amount Q_base.

[0067] It should be noted that the original external characteristic oil amount Q_base is the uncorrected external characteristic oil amount in the present application.

[0068] 2) Determine the first external characteristic correction oil amount coefficient A based on the reference temperature and the correction temperature threshold 温度 .

[0069] Specifically, the expression of the first external characteristic correction oil amount coefficient is as follows:

[0070] A 温度 =1+k·(T_ 修正温度阈值 -T_ 参考温度 ) / T_ 修正温度阈值 (1);

[0071] In the formula, A 温度 represents the first external characteristic correction oil amount coefficient, T_ 修正温度阈值 represents the correction temperature threshold, which is determined according to different engine models, for example, the value of T_ 修正温度阈值 is 70℃, and T_ 参考温度 represents the reference temperature, and k represents the engine type coefficient, which has a value range of 0.3-0.5.

[0072] 3) The original external characteristic oil amount is corrected by using the first external characteristic correction oil amount coefficient to obtain the initial external characteristic correction oil amount.

[0073] The expression of the initial external characteristic correction oil amount Q_A 温度 is as follows:

[0074] Q_A 温度 =Q_base×A 温度 (2);

[0075] Combining formula (1) and formula (2), the final expression of the initial external characteristic correction oil amount Q_A 温度 is as follows:

[0076] Q_A温度 = Q_base x (1 + k x (T 修正温度阈值 -T 参考温度 ) / T 修正温度阈值 ) (3).

[0077] Step S103, based on the size relationship between the initial external characteristic correction oil amount and the upper limit threshold and the lower limit threshold of the external characteristic oil amount, determine the final target external characteristic correction oil amount.

[0078] Wherein, the upper limit threshold and the lower limit threshold of the external characteristic oil amount are dynamically determined based on the engine speed, and are dynamically adjusted through the simulation of low temperature environment.

[0079] It should be particularly pointed out that the upper limit threshold of the external characteristic oil amount considers the influence of the fatigue limit of engine material on the external characteristic oil amount when determining; the lower limit threshold of the external characteristic oil amount considers the influence of the cold loading demand reference on the external characteristic oil amount when determining.

[0080] The present application realizes the dynamic correction of the external characteristic oil amount by the double threshold composed of the upper limit threshold and the lower limit threshold of the external characteristic oil amount, and dynamically adjusts the corresponding value through the simulation of low temperature environment.

[0081] Step S104, when the generator set performs transient loading, the engine is controlled to perform fuel injection operation according to the target external characteristic correction oil amount in the cold state.

[0082] In conclusion, the present application discloses an engine control method, when the engine starts successfully, the reference temperature of the external characteristic oil amount correction coefficient is determined according to the key temperature parameter of the engine, when the reference temperature is less than the preset correction temperature threshold, the initial external characteristic correction oil amount is determined based on the reference temperature and the correction temperature threshold, the final target external characteristic correction oil amount is determined based on the size relationship between the initial external characteristic correction oil amount and the upper limit threshold and the lower limit threshold of the external characteristic oil amount, when the generator set performs transient loading, the engine is controlled to perform fuel injection operation according to the target external characteristic correction oil amount in the cold state. In the present application, the upper limit threshold and the lower limit threshold of the external characteristic oil amount can be dynamically adjusted in the simulation of low temperature environment, so that the external characteristic oil amount can be dynamically corrected in real time based on the adjusted double threshold range, the rapid loading capacity of the engine in the cold state is improved on the premise of ensuring the reliability of the engine, so that it can be quickly loaded to the target load; at the same time, the transient response characteristics of the generator set are improved, and the occurrence of under frequency shutdown, flameout and other situations caused by the fixed limitation of external characteristic oil supply in the traditional technology is effectively avoided.

[0083] In one embodiment, step S101 can specifically include:

[0084] 1) Obtain a key temperature parameter of the engine.

[0085] In practical applications, the engine control unit can obtain the key temperature parameter of the engine through a temperature sensor on the engine.

[0086] The key temperature parameter of the engine in this embodiment includes but is not limited to: engine water outlet temperature T_water, exhaust temperature before turbine T_exhaust, oil temperature T_oil, and intake temperature after intercooler T_intake.

[0087] 2) Convert the exhaust temperature before turbine according to a preset proportion to obtain a target exhaust temperature before turbine.

[0088] In practical applications, since the exhaust temperature before turbine T_exhaust has a faster temperature rising rate than the engine water outlet temperature T_water, in order to make the temperature rising amplitudes of the two consistent, this embodiment converts the exhaust temperature before turbine T_exhaust by a preset proportion to obtain a target exhaust temperature before turbine matching the engine water outlet temperature variation characteristic.

[0089] The preset proportion can be an exhaust temperature compensation coefficient, the value of the exhaust temperature compensation coefficient is determined according to the engine model, and the value range can be 0.6-0.8.

[0090] 3) Select the minimum value of the temperatures from the engine water outlet temperature, the target exhaust temperature before turbine, the oil temperature, and the intake temperature after intercooler.

[0091] 4) Determine the minimum value of the temperatures as a reference temperature.

[0092] Specifically, the reference temperature T_ref of the external characteristic oil quantity correction coefficient is determined as follows: 参考温度

[0093] T 参考温度 _ref = min (T_water, a · T_exhaust, T_oil, T_intake) (4).

[0094] In the formula, a is the exhaust temperature compensation coefficient.

[0095] In one embodiment, the determination process of the upper limit threshold Q_B 可靠性 of the external characteristic oil quantity includes:

[0096] 1) Determine the original external characteristic oil quantity corresponding to the current engine speed.

[0097] In practical applications, the external characteristic oil quantity corresponding to the current engine speed can be found from the existing external characteristic oil quantity curve as the original external characteristic oil quantity Q_base.

[0098] ​2) In the engine material fatigue limit outer characteristic oil quantity correction coefficient curve, the reliability of the current engine speed corresponding outer characteristic oil quantity correction coefficient is determined.

[0099] The engine material fatigue limit refers to the maximum stress amplitude or stress range that the material can withstand without fatigue failure under the long-term action of repeated alternating stress (or strain).

[0100] The engine material fatigue limit outer characteristic oil quantity correction coefficient curve is obtained by prior test, and the corresponding relationship between the engine speed and the reliability of the outer characteristic oil quantity correction coefficient is shown in the outer characteristic oil quantity correction coefficient curve, so that the corresponding reliability of the outer characteristic oil quantity correction coefficient B 可靠性 .

[0101] 3) The original outer characteristic oil quantity is corrected by using the reliability of the outer characteristic oil quantity correction coefficient, and the outer characteristic oil quantity upper threshold is obtained.

[0102] The expression of the outer characteristic oil quantity upper threshold Q_B 可靠性 is as follows:

[0103] Q_B 可靠性 =Q_base×B 可靠性 (5).

[0104] In one embodiment, the determination process of the outer characteristic oil quantity lower threshold Q_C 加载 includes:

[0105] 1) The original outer characteristic oil quantity corresponding to the current engine speed is determined.

[0106] 2) In the outer characteristic oil quantity correction coefficient curve obtained when the cold state 0-100% transient loading is successful, the second outer characteristic oil quantity correction coefficient corresponding to the current engine speed is determined.

[0107] The engine material fatigue limit outer characteristic oil quantity correction coefficient curve is obtained by prior test, and the corresponding relationship between the engine speed and the second outer characteristic oil quantity correction coefficient is shown in the outer characteristic oil quantity correction coefficient curve, so that the corresponding second outer characteristic oil quantity correction coefficient C 加载 is determined according to the current engine speed.

[0108] 3) The original outer characteristic oil quantity is corrected by using the second outer characteristic oil quantity correction coefficient, and the outer characteristic oil quantity lower threshold is obtained.

[0109] The expression of the outer characteristic oil quantity lower threshold Q_C 加载 is as follows:

[0110] Q_C 加载 =Q_base×C加载 (6).

[0111] In one embodiment, step S103 can specifically include:

[0112] 1) If the initial outer characteristic correction oil amount is not less than the upper limit threshold of the outer characteristic oil amount, the upper limit threshold of the outer characteristic oil amount is determined as the target outer characteristic correction oil amount.

[0113] 2) If the initial outer characteristic correction oil amount is not greater than the lower limit threshold of the outer characteristic oil amount, the lower limit threshold of the outer characteristic oil amount is determined as the target outer characteristic correction oil amount.

[0114] 3) If the initial outer characteristic correction oil amount is greater than the lower limit threshold of the outer characteristic oil amount and less than the upper limit threshold of the outer characteristic oil amount, the initial outer characteristic correction oil amount is determined as the target outer characteristic correction oil amount.

[0115] In actual application, by comparing the initial outer characteristic correction oil amount Q_A 温度 with the upper limit threshold of the outer characteristic oil amount Q_B 可靠性 and the lower limit threshold of the outer characteristic oil amount Q_C 加载 , the final target outer characteristic correction oil amount Q_T 修正 is determined.

[0116] If Q_A 温度 ≥ Q_B 可靠性 , the target outer characteristic correction oil amount Q_T 修正 = Q_B 可靠性 .

[0117] If Q_A 温度 ≤ Q_C 加载 , the target outer characteristic correction oil amount Q_T 修正 = Q_C 加载 .

[0118] If Q_C 加载 < Q_A 温度 < Q_B 可靠性 , the target outer characteristic correction oil amount Q_T 修正 = Q_A 温度 .

[0119] In the present application, the upper limit threshold of the outer characteristic oil amount Q_B 可靠性 and the lower limit threshold of the outer characteristic oil amount Q_C 加载The double-threshold dynamic cooperative adjustment can be realized in the simulated low-temperature environment condition, so that the external characteristic oil quantity can be dynamically corrected in real time based on the adjusted double-threshold range, the quick loading capacity of the engine during starting in the cold state is improved on the premise of ensuring the reliability of the engine, the engine can be quickly loaded to the target load; and the transient response characteristic of the generator set is improved, and the under-frequency shutdown and flameout and the like caused by the fixed limitation of the external characteristic oil quantity in the traditional technology are effectively avoided.

[0120] In one embodiment, after step S104, the engine control method can further include:

[0121] 1) starting timing while controlling the engine to perform the fuel injection operation according to the target external characteristic corrected oil quantity in the cold state;

[0122] 2) when the timing time reaches the maximum allowable time threshold, controlling the engine to switch to perform the fuel injection operation according to the original external characteristic oil quantity.

[0123] The value of the maximum allowable time threshold in the application is determined based on the time required for the engine to be loaded to the target load, and the specific value is determined according to actual needs, which is not limited in the application.

[0124] The embodiment starts timing while controlling the engine to perform the fuel injection operation according to the target external characteristic corrected oil quantity in the cold state, if the timing time does not reach the maximum allowable time threshold, the engine is continuously controlled to perform the fuel injection operation according to the target external characteristic corrected oil quantity Q 修正 , and if the timing time reaches the maximum allowable time threshold, the engine is controlled to switch to perform the fuel injection operation according to the original external characteristic oil quantity Q_base.

[0125] To facilitate understanding of the engine control method disclosed in the application, the engine control method will be described in detail in combination with Figure 2 . Referring to Figure 2 , Figure 2 , a flowchart of the engine control method in one specific embodiment of the application is shown, and the engine control process includes:

[0126] (1) the engine is powered on.

[0127] (2) determining the upper threshold Q_B 可靠性 of the external characteristic oil quantity based on the fatigue limit of the engine material.

[0128] (3) determining the lower threshold Q_C 加载 of the external characteristic oil quantity based on the cold-state loading demand reference.

[0129] (4) The engine control unit detects the engine operating status and determines whether the engine has started successfully based on the engine operating status. If the engine has not started successfully, it directly controls the engine to perform fuel injection operation according to the original external characteristic fuel quantity Q_base.

[0130] (5) If the engine starts successfully, obtain the key temperature parameters of the engine, including but not limited to the engine outlet water temperature, turbine exhaust temperature, engine oil temperature, and intercooler intake temperature.

[0131] (6) The turbine inlet exhaust temperature is converted according to a preset ratio to obtain the target turbine inlet exhaust temperature. The minimum temperature value is selected from the engine outlet water temperature, the target turbine inlet exhaust temperature, the engine oil temperature, and the intercooler intake temperature as the reference temperature T_ for the external characteristic oil quantity correction coefficient. 参考温度 .

[0132] (7) Taking the preset correction temperature threshold value of 70℃ as an example, determine the reference temperature T_ 参考温度 If the temperature is below 70℃, directly control the engine to perform fuel injection according to the original external characteristic fuel quantity Q_base.

[0133] (8) If the reference temperature T_ 参考温度 For temperatures below 70℃, the initial external characteristic correction oil quantity Q_A is determined based on the reference temperature and the correction temperature threshold. 温度 .

[0134] (9) Based on Q_A 温度 With Q_B 可靠性 Q_C 加载 The magnitude relationship determines the target external characteristic correction oil quantity Q_ 修正 The value of .

[0135] Specifically, if Q_A 温度 ≥Q_B 可靠性 Target external characteristics corrected oil quantity Q_ 修正 =Q_B 可靠性 ;

[0136] If Q_A 温度 ≤Q_C 加载 Target external characteristics corrected oil quantity Q_ 修正 =Q_C 加载 ;

[0137] If Q_C 加载 <Q_A 温度 <Q_B 可靠性 Target external characteristics corrected oil quantity Q_ 修正 =Q_A 温度 .

[0138] (10) When the generator set is under transient loading, the engine is controlled to correct the oil quantity Q according to the target external characteristic in the cold state 修正 The fuel injection operation is performed, and it is judged whether the timing time reaches the maximum allowable time threshold T time .

[0139] (11) If the maximum allowable time threshold T is not reached time , the engine is controlled to continue to correct the oil quantity Q according to the target external characteristic in the cold state 修正 The fuel injection operation is performed; otherwise, the engine is controlled to switch to perform the fuel injection operation according to the original external characteristic oil quantity Q_base.

[0140] Corresponding to the method embodiment, the application further discloses an engine control device.

[0141] Referring to Figure 3 , the engine control device disclosed by the embodiment of the application has a structural schematic diagram, and the device is applied to an engine control unit, and the device comprises:

[0142] The reference temperature determination unit 201 is used for determining the reference temperature of the external characteristic oil quantity correction coefficient according to the key temperature parameter of the engine when the engine starts successfully.

[0143] When the engine is powered on, the engine control unit detects the running state of the engine, and if it is determined that the engine starts successfully according to the running state of the engine, the engine control unit obtains the key temperature parameter of the engine, and determines the reference temperature of the external characteristic oil quantity correction coefficient according to the key temperature parameter of the engine.

[0144] The key temperature parameter of the engine includes but is not limited to the engine water outlet temperature, the pre-turbine exhaust temperature, the engine oil temperature and the inter-cooled intake air temperature.

[0145] When the engine control unit determines that the engine does not start successfully according to the running state of the engine, the engine control unit determines the original external characteristic oil quantity Q_base corresponding to the current engine speed, and controls the engine to perform the fuel injection operation according to Q_base.

[0146] The initial correction oil quantity determination unit 202 is used for determining the initial external characteristic correction oil quantity based on the reference temperature and the correction temperature threshold when the reference temperature is less than the preset correction temperature threshold.

[0147] When the reference temperature is less than the preset correction temperature threshold, it is determined that the current engine working condition satisfies the correction activation condition of the external characteristic oil quantity in the cold state, and the initial external characteristic correction oil quantity is determined based on the reference temperature and the correction temperature threshold.

[0148] The final correction oil amount determination unit 203 is configured to determine a final target external characteristic correction oil amount based on a size relationship between the initial external characteristic correction oil amount and an upper limit threshold of the external characteristic oil amount and a lower limit threshold of the external characteristic oil amount.

[0149] The upper limit threshold of the external characteristic oil amount and the lower limit threshold of the external characteristic oil amount are dynamically determined based on an engine speed and are dynamically adjusted in a simulated low-temperature environment.

[0150] The control unit 204 is configured to control the engine to perform fuel injection according to the target external characteristic correction oil amount in a cold state when the generator set is subjected to transient loading.

[0151] According to the engine control device, after the engine is successfully started, the reference temperature of the external characteristic oil amount correction coefficient is determined according to the key temperature parameter of the engine, the initial external characteristic correction oil amount is determined based on the reference temperature and the correction temperature threshold when the reference temperature is less than the preset correction temperature threshold, the final target external characteristic correction oil amount is determined based on a size relationship between the initial external characteristic correction oil amount and an upper limit threshold of the external characteristic oil amount and a lower limit threshold of the external characteristic oil amount, and the engine is controlled to perform fuel injection according to the target external characteristic correction oil amount in a cold state when the generator set is subjected to transient loading. In the engine control device, the upper limit threshold of the external characteristic oil amount and the lower limit threshold of the external characteristic oil amount can be dynamically adjusted in a simulated low-temperature environment, so that the external characteristic oil amount can be dynamically corrected based on the adjusted double threshold range, the rapid loading capacity of the engine during starting in a cold state is improved, the engine can be rapidly loaded to a target load, the transient response characteristic of the generator set is improved, and the occurrence of under-frequency shutdown and flameout in the prior art is avoided.

[0152] In one embodiment, the initial correction oil amount determination unit 202 can be specifically configured to:

[0153] determine an original external characteristic oil amount corresponding to a current engine speed;

[0154] determine a first external characteristic correction oil amount coefficient based on the reference temperature and the correction temperature threshold;

[0155] correct the original external characteristic oil amount by using the first external characteristic correction oil amount coefficient to obtain the initial external characteristic correction oil amount.

[0156] The process of determining the first external characteristic correction oil amount coefficient based on the reference temperature and the correction temperature threshold includes:

[0157] A 温度 =1+k·(T_ 修正温度阈值 -T_ 参考温度) / T_ 修正温度阈值 ;

[0158] In the formula, A 温度 represents the first outer characteristic correction oil amount coefficient, T 修正温度阈值 represents the correction temperature threshold value, which is determined according to different engine models, T 参考温度 represents the reference temperature, and k represents an engine type coefficient.

[0159] In one embodiment, the final correction oil amount determination unit 203 can be specifically configured to:

[0160] if the initial outer characteristic correction oil amount is not less than the outer characteristic oil amount upper threshold value, determining the outer characteristic oil amount upper threshold value as the target outer characteristic correction oil amount;

[0161] if the initial outer characteristic correction oil amount is not greater than the outer characteristic oil amount lower threshold value, determining the outer characteristic oil amount lower threshold value as the target outer characteristic correction oil amount;

[0162] if the initial outer characteristic correction oil amount is greater than the outer characteristic oil amount lower threshold value and less than the outer characteristic oil amount upper threshold value, determining the initial outer characteristic correction oil amount as the target outer characteristic correction oil amount.

[0163] In one embodiment, the engine control device can further include:

[0164] an upper threshold value determination unit configured to determine an outer characteristic oil amount upper threshold value.

[0165] The upper threshold value determination unit can be specifically configured to:

[0166] determine an original outer characteristic oil amount corresponding to a current engine speed;

[0167] determine a reliability outer characteristic oil amount correction coefficient corresponding to the current engine speed in an outer characteristic oil amount correction coefficient curve of an engine material fatigue limit;

[0168] correct the original outer characteristic oil amount by using the reliability outer characteristic oil amount correction coefficient to obtain the outer characteristic oil amount upper threshold value.

[0169] In one embodiment, the engine control device can further include:

[0170] a lower threshold value determination unit configured to determine an outer characteristic oil amount lower threshold value.

[0171] The lower threshold value determination unit can be specifically configured to:

[0172] determine an original outer characteristic oil amount corresponding to a current engine speed;

[0173] In the oil quantity correction coefficient curve of the external characteristic obtained when the cold-state 0-100% transient loading succeeds, a second external characteristic oil quantity correction coefficient corresponding to the current engine speed is determined;

[0174] The original external characteristic oil quantity is corrected by using the second external characteristic oil quantity correction coefficient, so as to obtain the external characteristic oil quantity lower limit threshold.

[0175] In an embodiment, the reference temperature determination unit 201 is specifically configured to:

[0176] Obtain the engine key temperature parameter, and the engine key temperature parameter includes an engine outlet water temperature, a turbine front exhaust temperature, an engine oil temperature, and a post-intercooler intake air temperature;

[0177] The turbine front exhaust temperature is converted according to a preset proportion, so as to obtain a target turbine front exhaust temperature;

[0178] From the engine outlet water temperature, the target turbine front exhaust temperature, the engine oil temperature, and the post-intercooler intake air temperature, a minimum temperature value is selected;

[0179] The minimum temperature value is determined as the reference temperature.

[0180] In an embodiment, the engine control device can further include:

[0181] A timing unit configured to start timing while controlling the engine to perform the fuel injection operation according to the target external characteristic correction oil quantity in the cold state;

[0182] A control switching unit configured to control the engine to switch to performing the fuel injection operation according to the original external characteristic oil quantity when the timing time reaches a maximum allowed time threshold.

[0183] It should be noted that the specific working principles of the components in the device embodiment are described in the corresponding part of the method embodiment, which will not be described here.

[0184] Corresponding to the above-mentioned embodiments, the present application further discloses a computer storage medium, which stores at least one instruction, and the at least one instruction is executed by a processor to realize the steps shown in the engine control method embodiment.

[0185] The computer storage media can be a tangible media that can include or store the programs for use by or in connection with an instruction execution system, apparatus, or device. The computer storage media can be a machine-readable signal media or a machine-readable storage media. The computer storage media can include, but not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of the machine-readable storage media will include, but not limited to, one or more lines of electrical connection, portable computer diskette, hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disc read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the foregoing.

[0186] Corresponding to the above-mentioned embodiments, as shown in Figure 4 The present application also provides a structural diagram of an electronic device, which can include a processor 1 and a memory 2.

[0187] The processor 1 and the memory 2 can communicate with each other through a communication bus 3.

[0188] The processor 1 can execute at least one instruction.

[0189] The memory 2 can store at least one instruction.

[0190] The processor 1 can be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0191] The memory 2 can include a high-speed RAM memory, and can also include a non-volatile memory, such as at least one disk memory.

[0192] The processor can execute at least one instruction to implement the steps shown in the engine control method embodiments.

[0193] In practical applications, the electronic device can be an engine control unit.

[0194] Finally, it should be noted that the terms "first", "second", and the like, herein do not denote any order, quantity, combination, or importance, but rather are used to distinguish one element from another, and are not intended to denote the presence of any such actual relationship or order. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0195] The various embodiments in the specification are described with progression in this order of description. Embodiments having the same or similar descriptions are referenced by the same reference numerals, and an overlapping description is not repeated.

[0196] The above description of disclosed embodiments provides enabling disclosure sufficient for one of ordinary skill in the art to practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An engine control method, characterized in that, include: Once the engine starts successfully, determine the reference temperature for the external characteristic oil quantity correction coefficient based on the engine's key temperature parameters. When the reference temperature is less than the preset correction temperature threshold, the initial external characteristic correction oil quantity is determined based on the reference temperature and the correction temperature threshold; Based on the relationship between the initial external characteristic correction oil quantity and the upper and lower limits of the external characteristic oil quantity, the final target external characteristic correction oil quantity is determined. The upper and lower limits of the external characteristic oil quantity are dynamically determined based on the engine speed and are dynamically adjusted by simulating a low-temperature environment. When the generator set is subjected to transient loading, the engine is controlled to perform fuel injection operation in a cold state by correcting the fuel quantity according to the target external characteristics. Wherein: the reference temperature for determining the external characteristic oil quantity correction coefficient based on key engine temperature parameters after successful engine start includes: The key temperature parameters of the engine are obtained, including: engine outlet water temperature, turbine exhaust temperature, engine oil temperature and intercooler intake temperature. The vortex inlet temperature is converted according to a preset ratio to obtain the target vortex inlet temperature; Select the minimum temperature value from the engine outlet water temperature, the target turbine exhaust temperature, the engine oil temperature, and the intercooler intake temperature; The minimum temperature value is determined as the reference temperature; When the reference temperature is less than a preset correction temperature threshold, determining the initial external characteristic correction oil quantity based on the reference temperature and the correction temperature threshold includes: Determine the original external characteristic oil quantity corresponding to the current engine speed; The first external characteristic correction oil quantity coefficient is determined based on the reference temperature and the correction temperature threshold. The original external characteristic oil quantity is corrected using the first external characteristic correction oil quantity coefficient to obtain the initial external characteristic correction oil quantity; The process of determining the final target external characteristic correction oil quantity based on the relationship between the initial external characteristic correction oil quantity and the upper and lower limits of the external characteristic oil quantity includes: If the initial external characteristic correction oil quantity is not less than the upper limit threshold of the external characteristic oil quantity, the upper limit threshold of the external characteristic oil quantity shall be determined as the target external characteristic correction oil quantity; If the initial external characteristic correction oil quantity is not greater than the lower limit threshold of the external characteristic oil quantity, the lower limit threshold of the external characteristic oil quantity is determined as the target external characteristic correction oil quantity; If the initial external characteristic correction oil quantity is greater than the lower limit threshold of the external characteristic oil quantity and less than the upper limit threshold of the external characteristic oil quantity, the initial external characteristic correction oil quantity is determined as the target external characteristic correction oil quantity.

2. The engine control method according to claim 1, characterized in that, The process of determining the first external characteristic correction oil quantity coefficient based on the reference temperature and the correction temperature threshold includes: A 温度 =1+k·(T_ 修正温度阈值 -T_ 参考温度 ) / T_ 修正温度阈值 ; In the formula, A 温度 T_ represents the first external characteristic correction coefficient for oil quantity. 修正温度阈值 The corrected temperature threshold, T_, is determined based on different engine models. 参考温度 The reference temperature is represented by k, and the engine type coefficient is represented by k.

3. The engine control method according to claim 1 or 2, characterized in that, The process for determining the upper limit threshold of the external characteristic oil quantity includes: Determine the original external characteristic oil quantity corresponding to the current engine speed; In the external characteristic oil quantity correction coefficient curve of the fatigue limit of engine materials, determine the reliability external characteristic oil quantity correction coefficient corresponding to the current engine speed; The original external characteristic oil quantity is corrected using the reliability external characteristic oil quantity correction coefficient to obtain the upper limit threshold of the external characteristic oil quantity.

4. The engine control method according to claim 1 or 2, characterized in that, The process for determining the lower limit threshold of the external characteristic oil quantity includes: Determine the original external characteristic oil quantity corresponding to the current engine speed; In the external characteristic oil quantity correction coefficient curve obtained when the cold state 0-100% transient loading is successful, the second external characteristic oil quantity correction coefficient corresponding to the current engine speed is determined. The original external characteristic oil quantity is corrected using the second external characteristic oil quantity correction coefficient to obtain the lower limit threshold of the external characteristic oil quantity.

5. The engine control method according to claim 1, characterized in that, Also includes: The timing begins while controlling the engine to perform fuel injection operations in a cold state by correcting the fuel quantity according to the target external characteristics; When the timing reaches the maximum allowable time threshold, the engine is controlled to switch to perform fuel injection operation according to the original external characteristic fuel quantity.

6. An engine control device, characterized in that, include: The reference temperature determination unit is used to determine the reference temperature for the external characteristic oil quantity correction coefficient based on the key temperature parameters of the engine after the engine has started successfully. An initial correction oil quantity determination unit is used to determine the initial external characteristic correction oil quantity based on the reference temperature and the correction temperature threshold when the reference temperature is less than a preset correction temperature threshold. The final corrected fuel quantity determination unit is used to determine the final target external characteristic corrected fuel quantity based on the relationship between the initial external characteristic corrected fuel quantity and the upper limit threshold and lower limit threshold of the external characteristic fuel quantity. The upper limit threshold and the lower limit threshold of the external characteristic fuel quantity are both dynamically determined based on the engine speed and dynamically adjusted by simulating a low temperature environment. The control unit is used to control the engine to perform fuel injection operations in a cold state by correcting the fuel quantity according to the target external characteristics when the generator set is subjected to transient loading. The reference temperature determination unit is specifically used for: The key temperature parameters of the engine are obtained, including: engine outlet water temperature, turbine exhaust temperature, engine oil temperature and intercooler intake temperature. The vortex inlet temperature is converted according to a preset ratio to obtain the target vortex inlet temperature; Select the minimum temperature value from the engine outlet water temperature, the target turbine exhaust temperature, the engine oil temperature, and the intercooler intake temperature; The minimum temperature value is determined as the reference temperature; The initial correction oil quantity determination unit is specifically used for: Determine the original external characteristic oil quantity corresponding to the current engine speed; The first external characteristic correction oil quantity coefficient is determined based on the reference temperature and the correction temperature threshold. The original external characteristic oil quantity is corrected using the first external characteristic correction oil quantity coefficient to obtain the initial external characteristic correction oil quantity; The final corrected oil quantity determination unit is specifically used for: If the initial external characteristic correction oil quantity is not less than the upper limit threshold of the external characteristic oil quantity, the upper limit threshold of the external characteristic oil quantity shall be determined as the target external characteristic correction oil quantity; If the initial external characteristic correction oil quantity is not greater than the lower limit threshold of the external characteristic oil quantity, the lower limit threshold of the external characteristic oil quantity is determined as the target external characteristic correction oil quantity; If the initial external characteristic correction oil quantity is greater than the lower limit threshold of the external characteristic oil quantity and less than the upper limit threshold of the external characteristic oil quantity, the initial external characteristic correction oil quantity is determined as the target external characteristic correction oil quantity.

7. An electronic device, characterized in that, The electronic device includes: a memory and a processor; The memory is used to store at least one instruction; The processor is used to execute the at least one instruction to implement the engine control method as described in any one of claims 1 to 5.

8. A computer storage medium, characterized in that, The computer storage medium stores at least one instruction, which, when executed by a processor, implements the engine control method as described in any one of claims 1 to 5.

Images