Control method for flexible regeneration of engine
By obtaining the engine's functional disable state, real-time carbon amount and real-time exhaust temperature, activate the thermal management mode and flexibly control the regeneration execution, the problem of the inability to flexibly control the regeneration execution for different application scenarios in the prior art is solved, and efficient exhaust heat management and fuel consumption reduction are achieved.
Patent Information
- Application Number
- CN202510561450.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2025-06-20
AI Technical Summary
The existing National VI engine DPF regeneration method cannot flexibly control and perform regeneration in different application scenarios, resulting in low exhaust heat management efficiency and deterioration of fuel consumption.
By obtaining the disabled status of the function, real-time carbon quantity and real-time temperature exhaust, the thermal management mode is activated for efficient engine regeneration. According to the real-time carbon trigger function exit strategy, the real-time temperature trigger function interrupt strategy, and the function disabled state is judged based on the interrupt status to achieve flexible control of regeneration execution.
It realizes flexible control and regeneration execution for different application scenarios, improves the working efficiency of the engine, reduces fuel consumption, improves the exhaust heat management efficiency, and extends the regeneration interval.
Smart Images
Figure CN120175462A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of engines, and more specifically, to a control method for flexible regeneration of an engine. Background Art
[0002] Existing methods for triggering DPF regeneration of national VI engines are all automatically triggered through a fitting model and a counter function. Therefore, for different application scenarios, the regeneration execution effects vary significantly, and the universality of the regeneration scheme is poor. For application scenarios such as short-distance transportation, frequent start-stop, and intermittent operation, it is impossible to flexibly control the regeneration execution according to the differences in application scenarios, resulting in low exhaust heat management efficiency, and easily causing problems such as frequent regeneration, oil dilution, high regeneration temperature, crystallization, deterioration of emissions and fuel consumption. Summary of the Invention
[0003] The technical problem to be solved by the present invention is to provide a control method for flexible regeneration of an engine in view of the deficiencies of the prior art, which solves the technical problem that the existing methods for DPF regeneration of national VI engines cannot flexibly control the regeneration execution according to the differences in application scenarios.
[0004] A control method for flexible regeneration of an engine according to the present invention includes obtaining a function disabled state, a real-time carbon amount, and a real-time exhaust temperature. When the function disabled state is not disabled and meets a preset function activation condition, a heat management mode is activated to enable efficient regeneration of the engine; a function exit strategy is triggered according to the real-time carbon amount to determine whether to exit the heat management mode, a function interruption strategy is triggered according to the real-time exhaust temperature to record an interruption state, and a function disable strategy is triggered according to the interruption state to determine the function disabled state.
[0005] For further improvement, the function activation conditions include a first activation condition, a second activation condition, a third activation condition, and a fourth activation condition;
[0006] The first activation condition is that the carbon loading of the engine is greater than a preset carbon loading standard value;
[0007] The second activation condition is that the driving mileage of the vehicle is greater than a preset standard mileage;
[0008] The third activation condition is that the driving time of the vehicle is greater than a preset driving standard time;
[0009] The fourth activation condition is that the average output power of the vehicle within a preset activation time is greater than a preset output power standard value;
[0010] When the first activation condition, the second activation condition, the third activation condition, and the fourth activation condition are all satisfied, the heat management mode is activated.
[0011] Furthermore, the function exit strategy is
[0012] Set a first exit time, a second exit time, and a function exit count value with an initial value of zero. When the thermal management mode is started, the first exit time starts counting; the real-time carbon amount after the first exit time ends is used as the first carbon amount. When the first carbon amount is less than a preset standard exit carbon amount, the second exit time starts counting, and the real-time carbon amount when the second exit time ends is used as the second carbon amount. When the second carbon amount is still less than the standard exit carbon amount, the thermal management mode is exited and the function exit count value is incremented by one.
[0013] When the second carbon amount is greater than or equal to the standard exit carbon amount or the duration of the thermal management mode is less than a preset thermal management mode duration setting value, the thermal management mode is not exited.
[0014] Furthermore, the function interruption strategy is as follows.
[0015] Set an interruption time threshold, an exhaust temperature threshold, and a function interruption count value with an initial value of zero. When the duration for which the real-time exhaust temperature is lower than the exhaust temperature threshold is greater than or equal to the interruption time threshold, it is determined that the interruption state is interrupted and the function interruption count value is incremented by one, and at the same time the thermal management mode is interrupted; otherwise, it is determined that the interruption state is not interrupted.
[0016] Furthermore, when the thermal management mode is exited, both the function interruption count value and the trigger condition for engine active regeneration are reset.
[0017] Furthermore, the function disabling strategy includes a first disabling condition, a second disabling condition, and a third disabling condition. Obtain the function disabling switch state.
[0018] The first disabling condition is that the function interruption count value is greater than or equal to a preset function interruption count threshold.
[0019] The second disabling condition is that the function exit count value is greater than or equal to a preset function exit count threshold.
[0020] The third disabling condition is that the function disabling switch state is on.
[0021] When the first disabling condition or the second disabling condition or the third disabling condition is satisfied, it is determined that the function disabling state is disabled; otherwise, it is determined that the function disabling state is not disabled.
[0022] Furthermore, when it is determined that the function disabling state is disabled and the engine active regeneration is completed, both the function exit count value and the function interruption count value are reset.
[0023] Beneficial effects
[0024] The advantages of the present invention are as follows:
[0025] By obtaining the function disabling state, the real-time carbon amount, and the real-time exhaust temperature, when the function disabling state is the non-disabled state and meets the preset function activation conditions, the heat management mode is activated to enable the engine to regenerate; a function exit strategy is triggered according to the real-time carbon amount to determine whether to exit the heat management mode, a function interruption strategy is triggered according to the real-time exhaust temperature to record the interruption state, and a function disabling strategy is triggered according to the interruption state to determine the function disabling state; realizing flexible control of regeneration execution for application scenarios, thereby improving the working efficiency of the engine, reducing fuel consumption, improving the exhaust heat management efficiency, and increasing the working life of engine components. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a flowchart of the control method for flexible regeneration of the engine according to the present invention. DETAILED DESCRIPTION OF THE INVENTION
[0027] The following will further describe the present invention in conjunction with embodiments, but it does not constitute any limitation to the present invention. Any limited modifications made by anyone within the scope of the claims of the present invention are still within the scope of the claims of the present invention.
[0028] Refer to Figure 1 , a control method for flexible regeneration of an engine according to the present invention. The method is to obtain the function disabling state, the real-time carbon amount, and the real-time exhaust temperature. When the function disabling state is the non-disabled state and meets the preset function activation conditions, the heat management mode is activated to enable the engine to regenerate efficiently; a function exit strategy is triggered according to the real-time carbon amount to determine whether to exit the heat management mode, a function interruption strategy is triggered according to the real-time exhaust temperature to record the interruption state, and a function disabling strategy is triggered according to the interruption state to determine the function disabling state.
[0029] This solution aims to extend the regeneration interval. By flexibly identifying application scenarios, selectively strengthening passive regeneration, delaying the regeneration trigger, and associating the regeneration function, a closed-loop management of the target solution and the regeneration function is achieved.
[0030] This solution controls the flexible regeneration of the engine through five functional modules:
[0031] 1. Function activation module: Under the premise condition of not disabling the function, identify function activation conditions such as carbon amount, time, or mileage, thereby activating the function request, and activating the function after detecting that the usage scenario meets the heat management requirements.
[0032] The function activation conditions include a first activation condition, a second activation condition, a third activation condition, and a fourth activation condition.
[0033] The first activation condition is that the carbon loading of the engine is greater than a preset carbon loading standard value. The second activation condition is that the driving mileage of the vehicle is greater than a preset standard mileage. The third activation condition is that the driving time of the vehicle is greater than a preset driving standard time. The fourth activation condition is that the average output power of the vehicle within a preset activation time is greater than a preset output power standard value. When the first activation condition, the second activation condition, the third activation condition, and the fourth activation condition are simultaneously met, the thermal management mode is activated. Timely activation of the thermal management mode is beneficial to balancing performance and fuel economy and improving driving safety.
[0034] 2. Thermal management module: Strengthen exhaust thermal management through combustion control (rail pressure, timing, throttle, exhaust throttle valve, etc.), electronically controlled accessories, and external heating devices. Rail pressure, that is, fuel rail pressure, refers to the fuel pressure delivered by the high-pressure fuel pump to the fuel rail. Engine timing refers to the relative positions and cooperation times of various components in the engine during the working cycle. It is related to the performance, stability, and fuel efficiency of the engine.
[0035] 3. Function exit module: After judging that the carbon amount and time conditions are met, automatically exit the function and reset the function interruption status and the non-carbon amount trigger condition for regeneration.
[0036] The function exit strategy is
[0037] Set the first exit time, the second exit time, and a function exit count value with an initial value of zero. When the thermal management mode is started, the first exit time starts timing; take the real-time carbon amount after the first exit time ends as the first carbon amount. When the first carbon amount is less than the preset standard exit carbon amount, the second exit time starts timing. Take the real-time carbon amount after the second exit time ends as the second carbon amount. When the second carbon amount is still less than the standard exit carbon amount, then exit the thermal management mode and the function exit count value is incremented by one.
[0038] When the second carbon amount is greater than or equal to the standard exit carbon amount or the duration of the thermal management mode is less than the preset thermal management mode duration setting value, the thermal management mode is not exited.
[0039] The function exit module realizes timely exit of the thermal management mode, enables the engine to avoid the risk of overheating, optimizes fuel economy, and promptly restores power performance.
[0040] 4. Function interruption module: During the function execution process, if the exhaust temperature remains low and the time condition is met, the function ends and the interruption status is recorded.
[0041] The function interruption strategy is
[0042] Set an interruption time threshold, an exhaust temperature threshold, and a function interruption count value with an initial value of zero. When the duration for which the real-time exhaust temperature is lower than the exhaust temperature threshold is greater than or equal to the interruption time threshold, it is determined that the interruption status is interrupted and the function interruption count value is incremented by one. At the same time, the thermal management mode is interrupted; otherwise, it is determined that the interruption status is not interrupted.
[0043] When exiting the thermal management mode, both the function interruption count value and the trigger condition for engine active regeneration are reset.
[0044] 5. Function disabling module: The disabling state is activated when conditions such as continuous function interruption, disable switch activation, and multiple function successes are met; the success state of the regeneration module resets the disabled function.
[0045] The function disabling strategy includes a first disabling condition, a second disabling condition, and a third disabling condition. Obtain the function disabling switch status. The first disabling condition is that the function interruption count value is greater than or equal to a preset function interruption count threshold; the second disabling condition is that the function exit count value is greater than or equal to a preset function exit count threshold; the third disabling condition is that the function disabling switch status is on. When the first disabling condition or the second disabling condition or the third disabling condition is met, it is determined that the function disabling state is disabled; otherwise, it is determined that the function disabling state is not disabled. This realizes flexible control of regeneration execution for application scenarios, without being restricted to data within one cycle, and improves the flexibility of data processing.
[0046] When it is determined that the function disabling state is disabled and the engine active regeneration is completed, both the function exit count value and the function interruption count value are reset.
[0047] The regeneration module in this application:
[0048] This control method is associated with the regeneration module. The success state of the regeneration module refers to the state where active regeneration is completed and the carbon amount is lower than the target threshold for regeneration exit.
[0049] The completion state of the regeneration module resets some conditions of the function disabling module, thereby restoring the activation of the target function of the function disabling module. The function exit module resets the trigger conditions (such as mileage, time) of the active regeneration counter of the regeneration module, thereby delaying the trigger of active regeneration. The regeneration described in this control method is passive regeneration, and the regeneration module described is active regeneration. Thus, flexible regeneration according to the engine conditions is realized.
[0050] The above are only the preferred embodiments of the present invention. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, and these will not affect the implementation effect of the present invention and the practicality of the patent.
Claims
1. A control method for flexible engine regeneration, characterized in that: The method includes obtaining a function disabling state, a real-time carbon amount, and a real-time exhaust temperature; when the function disabling state is not disabled and meets a preset function activation condition, activating a thermal management mode to regenerate the engine; triggering a function exit strategy according to the real-time carbon amount to determine whether to exit the thermal management mode, triggering a function interruption strategy according to the real-time exhaust temperature to record an interruption state, and triggering a function disabling strategy according to the interruption state to determine the function disabling state.
2. A control method for flexible engine regeneration according to claim 1, characterized in that: The function activation conditions include a first activation condition, a second activation condition, a third activation condition and a fourth activation condition; The first activation condition is that the carbon load of the engine is greater than a preset carbon load standard value; The second activation condition is that the vehicle's mileage is greater than a preset standard mileage; The third activation condition is that the driving time of the vehicle is greater than a preset standard driving time; The fourth activation condition is that the average output power of the vehicle within the preset activation time is greater than the preset output power standard value; When the first activation condition, the second activation condition, the third activation condition and the fourth activation condition are satisfied at the same time, the thermal management mode is activated.
3. A control method for flexible engine regeneration according to claim 1, characterized in that: The function exit strategy is: A first exit time, a second exit time and a function exit count value with an initial value of zero are set. When the thermal management mode is started, the first exit time starts to count; the real-time carbon amount after the first exit time ends is used as the first carbon amount. When the first carbon amount is less than the preset standard exit carbon amount, the second exit time starts to count, and the real-time carbon amount after the second exit time ends is used as the second carbon amount. When the second carbon amount is still less than the standard exit carbon amount, the thermal management mode is exited and the function exit count value is incremented by one. When the second carbon amount is greater than or equal to the standard exit carbon amount or the duration of the thermal management mode is less than a preset thermal management mode duration setting value, the thermal management mode is not exited.
4. A control method for flexible engine regeneration according to claim 3, characterized in that: The functional interruption strategy is: An interruption time threshold, an exhaust temperature threshold and a function interruption count value with an initial value of zero are set. When the duration of the real-time exhaust temperature being lower than the exhaust temperature threshold is greater than or equal to the interruption time threshold, the interruption state is judged to be interrupted and the function interruption count value is increased by one, and the thermal management mode is interrupted at the same time; otherwise, the interruption state is judged to be not interrupted.
5. A control method for flexible engine regeneration according to claim 4, characterized in that: When exiting the thermal management mode, the function interruption count value and the triggering condition for active engine regeneration are reset.
6. A control method for flexible engine regeneration according to claim 5, characterized in that: The function disabling strategy includes a first disabling condition, a second disabling condition and a third disabling condition, obtaining a function disabling switch state, The first disabling condition is that the function interruption count value is greater than or equal to a preset function interruption count threshold; The second disabling condition is that the function exit count value is greater than or equal to a preset function exit count threshold; The third disabling condition is that the function disabling switch state is on; When the first disabling condition, the second disabling condition, or the third disabling condition is met, the function disabling state is determined to be disabled; otherwise, the function disabling state is determined to be not disabled.
7. A control method for flexible engine regeneration according to claim 6, characterized in that: When it is determined that the function disabling state is disabled and the engine active regeneration is completed, both the function exit count value and the function interruption count value are reset.