Oil dilution warning device and method
By detecting the vehicle's condition and calculating oil dilution parameters, an alarm device is used to remind the driver to check or change the engine oil, thus solving the problem of insufficient oil dilution prediction and reducing the risk of engine component damage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HYUNDAI MOTOR CO LTD
- Filing Date
- 2021-09-30
- Publication Date
- 2026-06-05
AI Technical Summary
Existing technologies are insufficient to effectively predict and alert drivers to engine oil dilution, leading to an increased risk of engine component damage.
By detecting the vehicle's cold start status, rapid acceleration status, and high-speed maintenance time, the control device calculates oil dilution parameters, judges the degree of oil dilution based on the average value of the sum of parameters, and reminds the driver to check or change the engine oil through an alarm device.
Predicting oil dilution in advance reduces the risk of engine component damage and ensures normal engine operation.
Smart Images
Figure CN115285038B_ABST
Abstract
Description
[0001] Cross-reference to related applications
[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2021-0056993, filed with the Korean Intellectual Property Office on May 3, 2021, the entire contents of which are incorporated herein by reference. Technical Field
[0003] This disclosure relates to an oil dilution alarm device and method. More specifically, this disclosure relates to an oil dilution alarm device and method capable of predicting oil dilution and alerting the driver. Background Technology
[0004] Oil dilution refers to the phenomenon where fuel is diluted in the engine oil of a vehicle, resulting in a decrease in the oil's lubricating properties.
[0005] When engine oil is excessively diluted, its viscosity decreases, thereby increasing the risk of damage to engine components such as bearings, connecting rods, and crankshaft.
[0006] Therefore, there is an increasing need to predict oil dilution and provide drivers with opportunities to check or change engine oil.
[0007] The information disclosed in this background section is only intended to enhance the understanding of the background of this disclosure, and therefore may contain information that does not constitute prior art known to those skilled in the art in this country. Summary of the Invention
[0008] This disclosure is made to solve the problems described above, and its purpose is to provide an oil dilution alarm device and method thereof, which can predict oil dilution in advance and provide this information to the driver.
[0009] An oil dilution alarm device according to an embodiment of the present disclosure may include: a control device that predicts oil dilution based on the vehicle's cold start state, the vehicle's rapid acceleration state, and the vehicle's high-speed holding time; and an alarm device that guides the driver to check or change the engine oil based on the oil dilution predicted by the control device.
[0010] The control device can determine a first parameter based on the vehicle's cold start state, a second parameter based on the vehicle's rapid acceleration state, a third parameter based on the vehicle's high-speed maintenance time, and predict oil dilution based on the first to third parameters.
[0011] The control device can set the first parameter to a reference value when the vehicle is not in a cold start state, and set the first parameter to a value greater than the reference value when the vehicle is in a cold start state.
[0012] When the coolant temperature is higher than the standard temperature, the control device can determine that the vehicle is not in a cold start state and set the first parameter to the reference value. When the coolant temperature is lower than the standard temperature, the control device can determine that the vehicle is in a cold start state and set the first parameter to be greater than the reference value.
[0013] When the coolant temperature is between the standard temperature and the threshold temperature, the control device can increase the first parameter by a first interval, and when the coolant temperature is below the threshold temperature, the control device can increase the first parameter by a second interval greater than the first interval.
[0014] When the acceleration time when the coolant temperature reaches the standard temperature is taken as the reference acceleration time, the control device can set the second parameter to the reference value. When the acceleration time is less than the reference acceleration time, the control device can increase the second parameter at a first interval based on the reference value. And when the acceleration time is greater than the reference acceleration time, the control device can decrease the second parameter at a second interval greater than the first interval based on the reference value.
[0015] When the high-speed holding time for which the coolant temperature is maintained at a predetermined temperature for a predetermined time is a reference high-speed holding time, the control device can set the third parameter to a reference value. When the high-speed holding time is greater than the reference high-speed holding time, the control device can decrease the third parameter at a first interval. And when the high-speed holding time is less than the reference high-speed holding time, the control device can increase the third parameter at a second interval greater than the first interval.
[0016] The control device can predict oil dilution based on the average value of the sum of the first to third parameters during a predetermined number of start-ups.
[0017] When the average value of the total parameters is greater than or equal to the reference average value, the control device can guide the driver to check or change the engine oil through the alarm device.
[0018] An oil dilution alarm method according to another embodiment of the present disclosure includes: determining the cold start state of a vehicle; determining the rapid acceleration state of a vehicle through a control device; determining the high-speed holding time of a vehicle through a control device; predicting oil dilution based on the cold start state of the vehicle, the rapid acceleration state of the vehicle, and the high-speed holding time of the vehicle through the control device; and guiding the driver to check or change the engine oil based on the oil dilution through an alarm device.
[0019] The first parameter can be determined based on the vehicle's cold start state, the second parameter can be determined based on the vehicle's rapid acceleration state, the third parameter can be determined based on the vehicle's high-speed maintenance time, and oil dilution can be predicted based on the first to third parameters.
[0020] When the vehicle is not in a cold start state, the first parameter can be set to a reference value, and when the vehicle is in a cold start state, the first parameter can be set to a value greater than the reference value.
[0021] When the coolant temperature is higher than the standard temperature, it can be determined that the vehicle is not in a cold start state, and the first parameter can be set as a reference value. When the coolant temperature is lower than the standard temperature, it can be determined that the vehicle is in a cold start state, and the first parameter can be increased to be greater than the reference value.
[0022] When the acceleration time when the coolant temperature reaches the standard temperature is taken as the reference acceleration time, the second parameter can be set as the reference value. When the acceleration time is less than the reference acceleration time, the second parameter can be increased at a first interval based on the reference value. And when the acceleration time is greater than the reference acceleration time, the second parameter can be decreased at a second interval greater than the first interval based on the reference value.
[0023] When the coolant temperature is between the standard temperature and the threshold temperature, the first parameter can be increased by a first interval, and when the coolant temperature is below the threshold temperature, the first parameter can be increased by a second interval greater than the first interval.
[0024] When the acceleration time when the coolant temperature reaches the standard temperature is taken as the reference acceleration time, the second parameter can be set as the reference value. When the acceleration time is less than the reference acceleration time, the second parameter can be increased at a first interval based on the reference value. And when the acceleration time is greater than the reference acceleration time, the second parameter can be decreased at a second interval greater than the first interval based on the reference value.
[0025] When the high-speed holding time of the coolant temperature at the predetermined temperature for the predetermined time is the reference high-speed holding time, the third parameter can be set to the reference value. When the high-speed holding time is greater than the reference high-speed holding time, the third parameter can be decreased at the first interval. And when the high-speed holding time is less than the reference high-speed holding time, the third parameter can be increased at the second interval greater than the first interval.
[0026] Oil dilution can be predicted based on the average value of the sum of the first to third parameters during a predetermined number of start-ups.
[0027] When the average value of the total parameters is greater than or equal to the reference average value, the alarm device can guide the driver to check or change the engine oil.
[0028] According to the oil dilution alarm device and method of the present disclosure as described above, oil dilution can be predicted and provided to the driver based on the vehicle's cold start state, rapid acceleration state, and high-speed holding time, so as to provide the driver with the opportunity to check or change the engine oil.
[0029] This allows for the prevention of damage to the components that make up the engine. Attached Figure Description
[0030] The accompanying drawings are provided for reference in explaining the illustrative embodiments of this disclosure, and the technical ideas of this disclosure should not be construed as being limited to the drawings.
[0031] Figure 1 This is a block diagram illustrating the configuration of an oil dilution alarm device according to an embodiment of the present disclosure.
[0032] Figure 2 and Figure 3 This is a flowchart illustrating an oil dilution alarm method according to an embodiment of the present disclosure.
[0033] <Explanation of Figure Markers>
[0034] 10: Detection device
[0035] 20: Control device
[0036] 30: Alarm device Detailed Implementation
[0037] The present disclosure will now be described more fully with reference to the accompanying drawings illustrating embodiments thereof. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present disclosure.
[0038] The accompanying drawings and descriptions are intended to be illustrative rather than restrictive. Throughout the specification, the same reference numerals denote the same elements.
[0039] Furthermore, in the accompanying drawings, the dimensions and thicknesses of each element are arbitrarily shown for better understanding and ease of description, but this disclosure is not limited thereto.
[0040] The oil dilution alarm device according to an embodiment of the present disclosure will now be described with reference to the accompanying drawings.
[0041] Figure 1 This is a block diagram illustrating the configuration of an oil dilution alarm device according to an embodiment of the present disclosure.
[0042] like Figure 1 As shown, the oil dilution alarm device according to an embodiment of the present disclosure may include a detection device 10, a control device 20, and an alarm device 30.
[0043] The detection device 10 may include a coolant temperature sensor for detecting the coolant temperature of the vehicle, an oil temperature sensor for detecting the engine oil temperature of the vehicle, an outside air temperature sensor for detecting the outside air temperature, and an accelerator pedal position sensor for detecting the accelerator pedal opening. The coolant temperature, engine oil temperature, outside air temperature, and accelerator pedal opening detected by the detection device 10 are transmitted to the control device 20.
[0044] The control device 20 can predict oil dilution based on the coolant temperature, engine oil temperature, outside air temperature, or accelerator pedal opening transmitted from the detection device 10. The control device 20 can convert the oil dilution predicted based on the coolant temperature or engine oil temperature into a quantified value and transmit it to the alarm device 30.
[0045] For this purpose, the control device 20 may include at least one processor operated by a predetermined program, and the predetermined program is adapted to perform each step of the oil dilution alarm method according to embodiments of the present disclosure.
[0046] The warning device 30 can guide the driver to check and / or change the engine oil based on the oil dilution predicted by the control device 20 and converted into a quantified value. The warning device 30 can be implemented through a combination instrument panel or a central instrument panel installed in the vehicle.
[0047] The oil dilution alarm method according to the embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings.
[0048] Figure 2 and Figure 3 This is a flowchart illustrating an oil dilution alarm method according to an embodiment of the present disclosure.
[0049] like Figure 2 and Figure 3 As shown, the control device 20 detects the vehicle's start request (S10). When the driver moves the start key to the start position or presses the start button, it can be determined that the driver has entered a start request.
[0050] When a driver enters a vehicle start request, the coolant temperature sensor of the detection device 10 detects the coolant temperature and transmits the detected coolant temperature to the control device 20.
[0051] The control device 20 determines whether the vehicle is in a cold start state based on the coolant temperature (S20). For example, if the coolant temperature detected when the vehicle is started is lower than a predetermined standard temperature (e.g., 30 degrees Celsius), it can be determined that the control device 20 is in a cold start state; otherwise, it can be determined that the control device 20 is not in a cold start state.
[0052] If the vehicle is not in a cold start state, the control device 20 sets the first parameter to a reference value (S21).
[0053] If the vehicle is in a cold start state, the control device 20 sets the first parameter to a value greater than a reference value (e.g., "1") (S23). At this time, the first parameter gradually increases as the coolant temperature decreases. When the coolant temperature is lower than a predetermined threshold temperature (e.g., -20 degrees Celsius), the first parameter increases sharply.
[0054] In other words, if the coolant temperature at startup is higher than the standard temperature, the first parameter can be set to a reference value. If the coolant temperature at startup is between the standard temperature and the threshold temperature, the first parameter can be increased in a first interval. And if the coolant temperature at startup is lower than the threshold temperature, the first parameter can be increased in a second interval greater than the first interval.
[0055] For example, as shown in Table 1 below, when the coolant temperature is above 30 degrees Celsius (standard temperature) at startup, the first parameter can be set to 1 (reference value). At startup, if the coolant temperature is between 30 degrees Celsius and -20 degrees Celsius (threshold temperature), the first parameter is set to greater than 1, and in this case, the first parameter can be increased in increments of 0.05 every 10 degrees Celsius. When the coolant temperature is below -20 degrees Celsius (threshold temperature) at startup, the first parameter is set to greater than 1, and in this case, the first parameter can be increased in increments of 0.1 every 10 degrees Celsius.
[0056] (Table 1)
[0057] Coolant temperature -30 -20 -10 0 30 40 Remark First parameter 1.30 1.20 1.15 1.10 1 1
[0058] During a vehicle cold start, the engine's fuel injection increases, leading to increased oil dilution. Therefore, the vehicle's cold start status can be determined based on coolant temperature, with a higher first parameter setting indicating a lower coolant temperature, thereby predicting increased oil dilution. In embodiments of this disclosure, determining the vehicle's cold start status based on coolant temperature is described as an example, but the scope of this disclosure is not limited thereto. The vehicle's cold start status can also be determined based on engine oil temperature or outside air temperature.
[0059] For this purpose, an oil temperature sensor detects the temperature of the engine oil and transmits it to the control unit 20, which can determine the cold start status of the vehicle based on the engine oil temperature detected by the oil temperature sensor. Since the method for determining the cold start status of the vehicle based on engine oil temperature is the same as the method described above for determining the cold start status based on coolant temperature, a detailed description is omitted.
[0060] Optionally, an external air temperature sensor can detect the external air temperature and transmit it to the control device 20, which can then determine the vehicle's cold start status based on the external air temperature detected by the sensor. Since the method for determining the vehicle's cold start status based on external air temperature is the same as the method described above for determining the cold start status based on coolant temperature, a detailed description is omitted.
[0061] Control device 20 determines whether the vehicle is accelerating rapidly (S30). At this time, the determination of whether the vehicle is accelerating rapidly can be based on the duration for which the coolant temperature reaches a predetermined standard temperature (e.g., 60 degrees Celsius) (hereinafter, this duration is defined as "acceleration time"). For example, when the acceleration time is less than a reference acceleration time, the vehicle is determined to be in a "rapid acceleration state".
[0062] If the vehicle is determined to be in a state of rapid acceleration, the control device 20 sets the second parameter to a value greater than a reference value (e.g., "1") (S31). At this time, the smaller the acceleration time is than the reference acceleration time, the larger the second parameter is, and the larger the acceleration time is than the reference acceleration time, the smaller the second parameter is.
[0063] If the vehicle's acceleration time is a reference acceleration time, the second parameter can be set to a reference value (e.g., "1") (S33). If the vehicle's acceleration time is less than the reference acceleration time, the second parameter can be increased at a first interval based on the reference value. Furthermore, if the vehicle's acceleration time is greater than the reference acceleration time, the second parameter can be decreased at a second interval greater than the first interval based on the reference value (S35).
[0064] For example, as shown in Table 2 below, if the vehicle's acceleration time is 100 seconds (reference acceleration time), the second parameter can be set to 1 (reference value). If the vehicle's acceleration time is less than 100 seconds (reference acceleration time), the second parameter is set to greater than 1 (reference value), and in this case, the second parameter can be increased by 0.2 every 50 seconds. Conversely, if the vehicle's acceleration time is greater than 100 seconds (reference acceleration time), the second parameter is set to less than 1 (reference value), and in this case, the second parameter can be decreased by approximately 0.025 every 50 seconds.
[0065] (Table 2)
[0066] time 50 seconds 100 seconds 200 seconds 300 seconds 400 seconds Remark Second parameter 1.20 1.00 0.95 0.93 0.90
[0067] During rapid vehicle acceleration, the engine's fuel injection volume increases, leading to increased fuel dilution. Therefore, the presence of rapid acceleration is determined by the time it takes for the coolant temperature to reach the standard temperature, and a second parameter is set larger for faster acceleration, thereby predicting the increase in fuel dilution. In this embodiment of the invention, determining rapid vehicle acceleration based on the time it takes for the coolant temperature to reach the standard temperature is used as an example, but the scope of this disclosure is not limited thereto. Rapid vehicle acceleration can also be determined based on the vehicle speed detected by a vehicle speed sensor.
[0068] To this end, the vehicle speed sensor detects the vehicle's speed and transmits it to the control device 20. The control device 20 can determine whether there is rapid acceleration of the vehicle based on the time it takes for the vehicle speed detected by the vehicle speed sensor to reach a reference speed. Since the method for determining whether the vehicle is rapidly accelerating based on vehicle speed is the same as the method for determining whether rapid acceleration has occurred based on the time it takes for the coolant temperature to reach a standard temperature, a detailed description is omitted.
[0069] The control device 20 determines the high-speed holding time of the vehicle (S40). For example, the control device 20 may determine the duration for which the coolant maintains a predetermined temperature (e.g., 95 degrees Celsius) for a predetermined time (e.g., 100 seconds) and define such duration as the high-speed holding time for which the vehicle speed is maintained above a certain speed.
[0070] As the vehicle's high-speed holding time becomes longer than the reference high-speed holding time, the control device 20 sets the third parameter to be less than the reference value (e.g., "1") (S41). In this case, the longer the high-speed holding time is compared to the reference high-speed holding time, the smaller the third parameter is, and the smaller the high-speed holding time is compared to the reference high-speed holding time, the larger the third parameter is.
[0071] If the vehicle's high-speed holding time is the reference high-speed holding time, the third parameter can be set to the reference value (S43). If the vehicle's high-speed holding time is greater than the reference high-speed holding time, the third parameter can be decreased by a first interval based on the reference value (S41). And if the vehicle's high-speed holding time is less than the reference high-speed holding time, the third parameter can be increased by a second interval greater than the first interval based on the reference value (S45).
[0072] For example, as shown in Table 3 below, if the vehicle's high-speed holding time is 100 seconds (reference high-speed holding time), the third parameter can be set to 1 (reference value). If the vehicle's high-speed holding time is greater than 100 seconds, the third parameter is set to less than 1 (reference value), and in this case, the third parameter can be decreased at intervals of 0.025 every 50 seconds. Conversely, if the vehicle's high-speed holding time is less than 100 seconds, the third parameter is set to greater than 1 (reference value), and in this case, the third parameter can be increased at intervals of 0.1 every 50 seconds.
[0073] (Table 3)
[0074] time 50 seconds 100 seconds 200 seconds 300 seconds 400 seconds Remark Third parameter 1.10 1.00 0.95 0.90 0.85
[0075] If a vehicle maintains a high speed for a longer period, the evaporation rate of the fuel contained in the engine oil increases, and oil dilution decreases. Therefore, the longer the vehicle maintains a high speed, the smaller the magnitude of the third parameter becomes, and the shorter the high-speed maintenance time, the larger the magnitude of the third parameter becomes, thereby predicting whether oil dilution will increase or decrease. In the embodiments of this disclosure, the determination of the vehicle's high-speed maintenance time based on the coolant temperature is described as an example, but the scope of this disclosure is not limited thereto; the vehicle's high-speed maintenance time can be determined based on the engine oil temperature or the vehicle speed.
[0076] For this purpose, an oil temperature sensor detects the temperature of the engine oil and transmits it to the control unit 20. The control unit 20 can determine the high-speed holding time of the vehicle based on the engine oil temperature detected by the oil temperature sensor. Since the method for determining the high-speed holding time of the vehicle based on the engine oil temperature is the same as the method for determining the high-speed holding time based on the coolant temperature described above, a detailed description is omitted.
[0077] Optionally, the vehicle speed sensor detects the vehicle's speed and transmits it to the control device 20. The control device 20 can determine the high-speed holding time of the vehicle based on the vehicle speed detected by the vehicle speed sensor. Since the method for determining the high-speed holding time of the vehicle based on vehicle speed is the same as the method for determining the high-speed holding time of the vehicle based on coolant temperature described above, a detailed description is omitted.
[0078] When the vehicle is turned off (S50), the control device 20 calculates a total parameter by adding the first to the third parameters (S60). The larger the total parameter, the more severe the oil dilution can be determined by the control device 20.
[0079] The control device 20 detects the number of times the vehicle is started (S70). If the number of starts is greater than or equal to a predetermined number (e.g., 30 times), the control device 20 calculates the average value of the total parameters (S80).
[0080] If the average value of the total parameters is greater than or equal to the reference average value (e.g., 3.4) (S90), the control device 20 determines that there is a problem with the engine oil due to the deterioration of oil dilution, and notifies the driver to check or replace the engine oil via the alarm device 30 (S100).
[0081] As described above, the oil dilution alarm device and method according to embodiments of the present disclosure can predict oil dilution based on the vehicle's cold start state, the vehicle's rapid acceleration state, and the vehicle's high-speed holding time, and provide this information to the driver.
[0082] Furthermore, drivers can check or change the engine oil based on its dilution status, thus preventing the risk of damage to engine components in advance.
[0083] While this disclosure has been described in conjunction with what is now considered to be actual embodiments, it should be understood that this disclosure is not limited to the disclosed embodiments. Rather, this disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims
1. An oil dilution alarm device, comprising: The control device predicts oil dilution based on the vehicle's cold start status, rapid acceleration status, and high-speed holding time. as well as An alarm device, based on oil dilution predicted by the control device, guides the driver to check or change the engine oil.
2. The oil dilution alarm device according to claim 1, wherein, The control device determines a first parameter based on the vehicle's cold start state, a second parameter based on the vehicle's rapid acceleration state, a third parameter based on the vehicle's high-speed maintenance time, and predicts oil dilution based on the first to third parameters.
3. The oil dilution alarm device according to claim 2, wherein, The control device is configured to, When the vehicle is not in a cold start state, the first parameter is set to a reference value, and When the vehicle is in a cold start state, the first parameter is set to be greater than the reference value.
4. The oil dilution alarm device according to claim 3, wherein, When the coolant temperature is higher than the predetermined standard temperature, the control device determines that the vehicle is not in a cold start state and sets the first parameter to the reference value. When the coolant temperature is lower than the standard temperature, the control device determines that the vehicle is in a cold start state and sets the first parameter to be greater than the reference value.
5. The oil dilution alarm device according to claim 4, wherein, When the coolant temperature is between the standard temperature and the predetermined threshold temperature, the control device increases the first parameter by a first interval, and When the coolant temperature is lower than the threshold temperature, the control device increases the first parameter by a second interval greater than the first interval.
6. The oil dilution alarm device according to claim 2, wherein, When the acceleration time for the coolant temperature to reach the predetermined standard temperature is taken as the reference acceleration time, the control device sets the second parameter to the reference value. When the acceleration time is less than the reference acceleration time, the control device increases the second parameter at a first interval based on the reference value, and When the acceleration time is greater than the reference acceleration time, the control device reduces the second parameter based on the reference value at a second interval greater than the first interval. Among these methods, the duration for which the coolant temperature reaches a predetermined standard temperature is used to determine whether the vehicle is accelerating rapidly. The duration is defined as the acceleration time.
7. The oil dilution alarm device according to claim 2, wherein, When the high-speed holding time at which the coolant temperature is maintained at a predetermined temperature for a predetermined time is a reference high-speed holding time, the control device sets the third parameter to a reference value. When the high-speed holding time is greater than the reference high-speed holding time, the control device causes the third parameter to decrease at a first interval, and When the high-speed holding time is less than the reference high-speed holding time, the control device increases the third parameter by a second interval greater than the first interval. The duration during which the coolant maintains a predetermined temperature within a predetermined time period is defined as the high-speed holding time.
8. The oil dilution alarm device according to claim 2, wherein, The control device predicts oil dilution based on the average value of the sum of the first to third parameters during a predetermined number of start-ups.
9. The oil dilution alarm device according to claim 8, wherein, When the average value of the total parameters is greater than or equal to the reference average value, the control device guides the driver to check or change the engine oil through the alarm device.
10. An oil dilution alarm method, comprising: Determine the vehicle's cold start status; The rapid acceleration state of the vehicle is determined by the control device; The control device determines the high-speed maintenance time of the vehicle. The control device predicts oil dilution based on the vehicle's cold start state, rapid acceleration state, and high-speed holding time; and The alarm system guides the driver to check or change the engine oil based on oil dilution.
11. The oil dilution alarm method according to claim 10, wherein, A first parameter is determined based on the vehicle's cold start state, a second parameter is determined based on the vehicle's rapid acceleration state, a third parameter is determined based on the vehicle's high-speed maintenance time, and oil dilution is predicted based on the first parameter to the third parameter.
12. The oil dilution alarm method according to claim 11, wherein, When the vehicle is not in a cold start state, the first parameter is set to a reference value, and When the vehicle is in a cold start state, the first parameter is set to be greater than the reference value.
13. The oil dilution alarm method according to claim 12, wherein, When the coolant temperature is higher than the predetermined standard temperature, it is determined that the vehicle is not in a cold start state, therefore the first parameter is set to the reference value, and When the coolant temperature is lower than the standard temperature, the vehicle is determined to be in a cold start state, and the first parameter is increased to be greater than the reference value.
14. The oil dilution alarm method according to claim 11, wherein, When the acceleration time for the coolant temperature to reach the predetermined standard temperature is taken as the reference acceleration time, the second parameter is set as the reference value. When the acceleration time is less than the reference acceleration time, the second parameter is increased by a first interval based on the reference value, and When the acceleration time is greater than the reference acceleration time, the second parameter is decreased based on the reference value at a second interval greater than the first interval. Among these methods, the duration for which the coolant temperature reaches a predetermined standard temperature is used to determine whether the vehicle is accelerating rapidly. The duration is defined as the acceleration time.
15. The oil dilution alarm method according to claim 14, wherein, When the coolant temperature is between the standard temperature and the predetermined threshold temperature, the first parameter is increased at a first interval, and When the coolant temperature is lower than the threshold temperature, the first parameter is increased by a second interval greater than the first interval.
16. The oil dilution alarm method according to claim 11, wherein, When the high-speed holding time at which the coolant temperature is maintained at a predetermined temperature for a predetermined time is a reference high-speed holding time, the third parameter is set to a reference value. When the high-speed holding time is greater than the reference high-speed holding time, the third parameter is reduced by a first interval, and When the high-speed holding time is less than the reference high-speed holding time, the third parameter is increased by a second interval greater than the first interval. The duration during which the coolant maintains a predetermined temperature within a predetermined time period is defined as the high-speed holding time.
17. The oil dilution alarm method according to claim 11, wherein, Oil dilution is predicted based on the average value of the sum of the first to the third parameters during a predetermined number of startups.
18. The oil dilution alarm method according to claim 17, wherein, When the average value of the total parameters is greater than or equal to the reference average value, the alarm device guides the driver to check or change the engine oil.