A method for predicting engine oil change cycle based on regeneration frequency

Abstract

The present invention relates to a method for predicting the oil change cycle based on the regeneration frequency. The method obtains the oil dilution rate of a single regeneration cycle of a measured vehicle by simulating different environments and altitude conditions; then, the regeneration frequency is determined according to the regeneration trigger flag of the electronic control unit ECU of the measured vehicle, and the real-time oil dilution rate level is comprehensively calculated in combination with the obtained single regeneration cycle oil dilution rate; then, the maximum extreme value of the oil dilution rate is determined according to the reliability of the measured vehicle engine and the quality of its commonly used oil, so as to set high, medium and low frequency reminder strategies in different levels, and the instrument display specifications of the measured vehicle are determined accordingly. The method of the present invention can effectively eliminate the obstacles of DPF regeneration to the advancement of the long oil change strategy, without considering the use scenario and environment of the vehicle, and realizes real-time early warning reminders, while protecting the durability of the engine, achieving the maximum oil change as much as possible, so as to reduce the use cost and save oil.

Description

Technical Field

[0001] The invention relates to the technical field of diesel engine lubrication, and in particular to a method for predicting an engine oil change cycle based on a regeneration frequency. Background Art

[0002] At present, the diesel commercial vehicle industry is constantly pursuing long-term oil change, and long oil change technology has become a key point in market competition. The mainstream automobile manufacturers in the industry have started research on oil quality and oil filters, and have successively launched 40,000 or even longer oil change mileages; and due to the continuous upgrading and tightening of emission standards, the National VI stage diesel technology route must adopt diesel particulate filters (Diesel Particulate Filter, The DPF (DPF for short) is a post-treatment device. When the carbon particles are too full, the DPF will cause blockage. Therefore, when the carbon particles are captured to a certain extent, it is necessary to increase the inlet temperature of the device through diesel engine remote post-injection to achieve active regeneration and burn off the carbon particles to avoid blockage. The biggest disadvantage of the diesel engine remote post-injection temperature increase strategy is that the incompletely burned diesel injected into the post-injection will be brought into the oil pan by the piston, diluting the engine oil and affecting the oil quality. It is a great obstacle to long-term oil changes. The shorter the regeneration mileage (such as urban vehicles and special operation vehicles), the more frequent the regeneration, and the higher the oil dilution, the oil change mileage needs to be greatly shortened. When the regeneration mileage of high-speed logistics vehicles is very long, the regeneration frequency is very low, and the oil dilution is lower, the oil change mileage may not be affected by the DPF regeneration strategy.

[0003] To this end, the present invention provides a method for predicting an engine oil change cycle based on regeneration frequency. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a method for predicting the oil change cycle based on the regeneration frequency. The oil dilution model is designed based on the vehicle regeneration frequency, regeneration time, and operating environment. The oil dilution rate is then monitored in real time according to the model. An oil change time prediction model is designed based on the oil dilution rate, and vehicle instrument warnings are performed at multiple levels.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] A method for predicting an oil change cycle based on regeneration frequency comprises the following steps:

[0007] Step S1. Simulate under different environmental and altitude conditions to obtain the oil dilution rate of a single regeneration cycle of a measured vehicle;

[0008] Step S2, determining the regeneration frequency according to the regeneration trigger flag of the measured vehicle electronic control unit ECU, and comprehensively calculating the real-time oil dilution rate level in combination with the oil dilution rate of a single regeneration cycle obtained in step S1;

[0009] Step S3, determining the maximum extreme value of the oil dilution rate according to the measured reliability of the vehicle engine and the quality of the commonly used oil;

[0010] Step S4: according to the maximum extreme value of the oil dilution rate obtained in step S3, high, medium and low frequency reminder strategies are set in different levels, and the instrument display specification of the measured vehicle is determined accordingly.

[0011] Specifically, the simulation in step S1 is performed under different environmental and altitude conditions to obtain the oil dilution rate of a single regeneration cycle of a measured vehicle. The specific process is as follows:

[0012] In the laboratory, different environmental and altitude conditions are simulated, and the actual vehicle to be tested is used to test its actual oil dilution rate after m regeneration cycles. The average of the m test results is the oil dilution rate of a single regeneration cycle of the measured vehicle.

[0013] Specifically, in step S2, the regeneration frequency is determined according to the regeneration trigger flag of the measured vehicle electronic control unit ECU, and the real-time oil dilution rate level is comprehensively calculated in combination with the oil dilution rate of a single regeneration cycle obtained in step S1. The calculation process is as follows:

[0014] The regeneration trigger flag of the vehicle electronic control unit ECU is measured to determine the number of regeneration times n, and then the real-time oil dilution rate level b=a*n is calculated according to the oil dilution rate a of a single regeneration cycle obtained in step S1.

[0015] Specifically, in step S3, the maximum extreme value c of the oil dilution rate is determined according to the measured reliability of the vehicle engine and the quality of its commonly used oil. When the real-time oil dilution rate b of the vehicle is greater than or equal to the value c, the oil needs to be replaced.

[0016] Specifically, in step S4, according to the maximum extreme value of the oil dilution rate obtained in step S3, high, medium and low frequency reminder strategies are set in different levels, and the instrument display specifications of the measured vehicle are determined accordingly. The high, medium and low frequency reminder strategies are: when the b value is close to 90% of the c value, the instrument displays a first-level text reminder; when the b value reaches the c value, the instrument displays a second-level light reminder; when b exceeds the c value by 110%, the instrument displays a third-level flashing light reminder.

[0017] The beneficial effects of the present invention compared with the prior art are as follows:

[0018] The present invention designs an oil change time prediction model based on a simple oil dilution rate calculation model and an oil dilution rate boundary limit, which can accurately predict the oil change time for vehicle models in different usage scenarios, greatly promote the implementation of the long oil change strategy for diesel vehicles, eliminate the obstacle of DPF regeneration to the promotion of the long oil change strategy, and realize real-time early warning reminders without considering the usage scenario and environment of the vehicle, thereby protecting the durability of the engine and achieving the ultimate oil change as much as possible, so as to reduce the use cost and save the engine oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a flow chart of a method for predicting an oil change cycle based on regeneration frequency of the present invention;

[0021] Figure 2 is a logic diagram for calculating an oil dilution warning value based on the number of regenerations in an embodiment of the present invention;

[0022] Figure 3 It is a standard diagram of the interaction system between the engine EMS and the instrument IC in an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example: See Figure 1-3 .

[0025] like Figure 1 As shown, the present invention provides a method for predicting an oil change cycle based on a regeneration frequency, comprising the following steps:

[0026] Step S1. Simulate under different environmental and altitude conditions to obtain the oil dilution rate of a single regeneration cycle of a measured vehicle;

[0027] Step S2, determining the regeneration frequency according to the regeneration trigger flag of the measured vehicle electronic control unit ECU, and comprehensively calculating the real-time oil dilution rate level in combination with the oil dilution rate of a single regeneration cycle obtained in step S1;

[0028] Step S3, determining the maximum extreme value of the oil dilution rate according to the measured reliability of the vehicle engine and the quality of the commonly used oil;

[0029] Step S4: according to the maximum extreme value of the oil dilution rate obtained in step S3, high, medium and low frequency reminder strategies are set in different levels, and the instrument display specification of the measured vehicle is determined accordingly.

[0030] See also Figure 2 The following further describes the calculation method of the oil dilution rate of a single regeneration cycle and the real-time oil dilution rate level in step S1 and step S2 of the present invention.

[0031] Specifically, the simulation in step S1 obtains the oil dilution rate of a single regeneration cycle of a measured vehicle under different environmental and altitude conditions, and the calculation process is:

[0032] In the laboratory, different environmental and altitude conditions are simulated, and the actual vehicle to be tested is used to test its actual oil dilution rate after m regeneration cycles. The average of the m test results is the single regeneration cycle oil dilution rate of the measured vehicle. The test results of the regeneration cycle oil dilution rate under different environmental and altitude conditions are filled in the following Table 1.

[0033] Table 1 Statistics of oil dilution rate in a single regeneration cycle under different environmental and altitude conditions

[0034]

[0035] In the above table, x: ambient temperature, °C; y: atmospheric pressure, hPa;

[0036] Specifically, in step S2, the regeneration frequency is determined according to the regeneration trigger flag of the measured vehicle electronic control unit ECU, and the real-time oil dilution rate level is comprehensively calculated in combination with the oil dilution rate of a single regeneration cycle obtained in step S1. The calculation process is as follows:

[0037] The regeneration trigger flag of the vehicle electronic control unit ECU is measured to determine the number of regeneration times n, and then the real-time oil dilution rate level b=a*n is calculated according to the oil dilution rate a of a single regeneration cycle obtained in step S1.

[0038] Specifically, in step S3, the maximum extreme value c of the oil dilution rate is determined according to the measured reliability of the vehicle engine and the quality of its commonly used oil. When the real-time oil dilution rate b of the vehicle is greater than or equal to the value c, the oil needs to be replaced.

[0039] like Figure 3 The diagram shows the interaction system specification diagram of the engine EMS and the instrument IC of the measured vehicle used in the embodiment of the present invention. Specifically, according to the maximum extreme value of the oil dilution rate obtained in step S3, the high, medium and low frequency reminder strategies are set in different levels in step S4, and the instrument display specification of the measured vehicle is determined accordingly. The high, medium and low frequency reminder strategies are: when the b value is close to 90% of the c value, the instrument displays a first-level text reminder; when the b value reaches the c value, the instrument displays a second-level light reminder; when b exceeds the c value by 110%, the instrument flashes a third-level light reminder.

[0040] In summary, the present invention designs an oil change time prediction model based on a simple oil dilution rate calculation model and an oil dilution rate boundary limit, which can accurately predict the oil change time for vehicle models in different usage scenarios, greatly promote the implementation of the long oil change strategy for diesel vehicles, eliminate the obstacle of DPF regeneration to the promotion of the long oil change strategy, and realize real-time early warning reminders without considering the vehicle's usage scenario and environment, thereby protecting the engine's durability and achieving the ultimate oil change as much as possible, so as to reduce the cost of use and save oil.

[0041] The above is only a preferred embodiment of the present invention, and does not limit the structure of the present invention in any form. Any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A method for predicting an oil change cycle based on regeneration frequency, characterized in that: The following steps are involved: Step S1. Simulate under different environmental and altitude conditions to obtain the oil dilution rate of a single regeneration cycle of a measured vehicle; In the laboratory, different environmental and altitude conditions are simulated, and the actual vehicle to be tested is used to test its actual oil dilution rate after m regeneration cycles. The average of the m test results is the oil dilution rate of a single regeneration cycle of the measured vehicle; Step S2, determining the regeneration frequency according to the regeneration trigger flag of the measured vehicle electronic control unit ECU, and comprehensively calculating the real-time oil dilution rate level in combination with the oil dilution rate of a single regeneration cycle obtained in step S1; By measuring the regeneration trigger flag of the vehicle electronic control unit ECU, the regeneration number n is determined, and then according to the single regeneration cycle oil dilution rate a obtained in step S1, the real-time oil dilution rate level b=a*n is calculated; Step S3, determining the maximum extreme value of the oil dilution rate according to the measured reliability of the vehicle engine and the quality of the commonly used oil; Step S4: according to the maximum extreme value of the oil dilution rate obtained in step S3, high, medium and low frequency reminder strategies are set in different levels, and the instrument display specification of the measured vehicle is determined accordingly.

2. The method for predicting the oil change cycle based on the regeneration frequency according to claim 1, characterized in that: In step S3, the maximum extreme value c of the oil dilution rate is determined according to the measured reliability of the vehicle engine and the quality of its commonly used oil. When the real-time oil dilution rate b of the vehicle is greater than or equal to the value c, the oil needs to be replaced.

3. The method for predicting the oil change cycle based on the regeneration frequency according to claim 1, characterized in that: According to the maximum extreme value of the oil dilution rate obtained in step S3, step S4 sets high, medium and low frequency reminder strategies in different levels, and determines the instrument display specifications of the measured vehicle accordingly. The high, medium and low frequency reminder strategies are: when the b value is close to 90% of the c value, the instrument displays a first-level text reminder; when the b value reaches the c value, the instrument displays a second-level light reminder; when b exceeds the c value by 110%, the instrument displays a third-level flashing light reminder.

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