Novel engine oil pressure difference alarm strategy

Abstract

The invention discloses a novel engine oil pressure difference alarm strategy, relates to the field of engine fault control, and solves the technical problem that an existing engine oil pressure difference alarm strategy is prone to false alarm or missing alarm. The strategy comprises the steps that a first engine oil pressure difference alarm curve and a second engine oil pressure difference alarm curve are set, and a real-time engine oil temperature value and a real-time engine oil pressure difference value corresponding to the real-time engine oil temperature value are obtained; and judging a real-time engine oil pressure difference value through the first engine oil pressure difference alarm curve and the second engine oil pressure difference alarm curve so as to trigger a pressure difference alarm mechanism. The dynamic engine oil pressure difference alarm value is set, the problem of missing alarm or false alarm of engine oil pressure difference alarm is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of engine fault control, and more particularly to a novel oil pressure difference alarm strategy. Background Art

[0002] The existing oil pressure differential alarm strategy is to make a simple comparison of the alarm value with the difference between the pressure measurement value before the oil filter and the pressure measurement value after the oil filter. However, the oil pressure differential will decrease as the oil temperature increases. If the oil alarm value is set too low, the oil pressure differential alarm is prone to false alarm when the oil temperature is low. If the oil alarm value is set too high, when the oil temperature is high, if the oil filter shows a tendency to become clogged, the oil pressure differential alarm is prone to miss alarms, and oil filter abnormalities cannot be detected in advance. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a new oil pressure difference alarm strategy in view of the deficiencies in the prior art, so as to solve the technical problem that the prior oil pressure difference alarm strategy is prone to false alarm or missed alarm.

[0004] The present invention describes a novel oil pressure differential alarm strategy, which includes setting a first oil pressure differential alarm curve and a second oil pressure differential alarm curve, obtaining a real-time oil temperature value and a real-time oil pressure differential value corresponding to the real-time oil temperature value, and triggering a pressure differential alarm mechanism by judging the real-time oil pressure differential value through the first oil pressure differential alarm curve and the second oil pressure differential alarm curve.

[0005] As a further improvement, the method for setting the first oil pressure difference alarm curve and the second oil pressure difference alarm curve is:

[0006] Set the oil temperature axis, obtain the first pressure difference alarm value of the first oil at each oil temperature on the oil temperature axis, obtain the second pressure difference alarm value of the second oil at each oil temperature on the temperature axis, calibrate the first oil pressure difference alarm curve according to the oil temperature axis and the first pressure difference alarm value, and calibrate the second oil pressure difference alarm curve according to the oil temperature axis and the second pressure difference alarm value.

[0007] Furthermore, the first pressure difference alarm value at the same temperature on the temperature axis is greater than the second pressure difference alarm value.

[0008] Furthermore, the method for judging the real-time oil pressure difference value by using the first oil pressure difference alarm curve and the second oil pressure difference alarm curve is:

[0009] Obtain a third pressure differential alarm value corresponding to the real-time oil temperature value in the first oil pressure differential alarm curve, obtain a fourth pressure differential alarm value corresponding to the real-time oil temperature value in the second oil pressure differential alarm curve, and compare the real-time oil temperature with the third pressure differential alarm value and the fourth pressure differential alarm value, respectively.

[0010] Furthermore, the pressure difference alarm mechanism includes:

[0011] When the real-time oil pressure difference value is greater than or equal to the third pressure difference alarm value, a high pressure difference alarm is issued;

[0012] When the real-time oil pressure difference value is less than or equal to the fourth pressure difference alarm value, a low pressure difference alarm is issued;

[0013] When the real-time engine oil pressure difference value is greater than the fourth pressure difference warning value and less than the third pressure difference alarm value, the real-time engine oil pressure difference value is a normal pressure difference value and no alarm is issued.

[0014] Beneficial Effects

[0015] The advantages of the present invention are:

[0016] The present invention sets a first oil pressure difference alarm curve and a second oil pressure difference alarm curve, obtains a real-time oil temperature value and a real-time oil pressure difference value corresponding to the real-time oil temperature value, and triggers a pressure difference alarm mechanism by judging the real-time oil pressure difference value through the first oil pressure difference alarm curve and the second oil pressure difference alarm curve, thereby setting a dynamic oil pressure difference alarm value, reducing the problem of missed or false alarm of the oil pressure difference alarm, and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The oil pressure difference alarm strategy flow chart of the present invention;

[0018] Figure 2 A schematic diagram of a first engine oil pressure difference alarm curve and a second engine oil pressure difference alarm curve of the present invention;

[0019] Figure 3 It is a calibration diagram of the engine oil temperature and the corresponding first pressure difference alarm value and second pressure difference alarm value of the present invention. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the embodiments, but it does not constitute any limitation to the present invention. Any limited number of 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.

[0021] See also Figure 1-Figure 3 A novel oil pressure difference alarm strategy of the present invention includes setting a first oil pressure difference alarm curve and a second oil pressure difference alarm curve.

[0022] The method for setting the first engine oil differential pressure alarm curve and the second engine oil differential pressure alarm curve is as follows: setting the engine oil temperature axis, obtaining the first engine oil differential pressure alarm value at each engine oil temperature on the engine oil temperature axis, obtaining the second engine oil differential pressure alarm value at each engine oil temperature on the temperature axis, calibrating the first engine oil differential pressure alarm curve according to the engine oil temperature axis and the first engine oil differential pressure alarm value, and calibrating the second engine oil differential pressure alarm curve according to the engine oil temperature axis and the second engine oil differential pressure alarm value. The first engine oil differential pressure alarm value at the same temperature on the temperature axis is greater than the second engine oil differential pressure alarm value.

[0023] like Figure 2 As shown, on the oil temperature axis, the oil temperature is the vertical axis, the oil pressure difference alarm value is the horizontal axis, the oil pressure difference high alarm value at "a" oil temperature is set to "A", and the low alarm value is set to "A1"; the oil pressure difference high alarm value at "b" oil temperature is set to "B", and the low alarm value is set to "B1", and so on. Several oil temperature points are set to fit the first oil pressure difference alarm curve and the second oil pressure difference alarm curve.

[0024] The real-time oil temperature value and the real-time oil pressure difference value corresponding to the real-time oil temperature value are obtained, and the real-time oil pressure difference value is judged by the first oil pressure difference alarm curve and the second oil pressure difference alarm curve to trigger the pressure difference alarm mechanism.

[0025] The method for judging the real-time oil pressure difference value by using the first oil pressure difference alarm curve and the second oil pressure difference alarm curve is as follows:

[0026] Obtain a third pressure differential alarm value corresponding to the real-time oil temperature value in the first oil pressure differential alarm curve, obtain a fourth pressure differential alarm value corresponding to the real-time oil temperature value in the second oil pressure differential alarm curve, and compare the real-time oil temperature with the third pressure differential alarm value and the fourth pressure differential alarm value, respectively.

[0027] The differential pressure alarm mechanism includes:

[0028] When the real-time oil pressure difference value is greater than or equal to the third pressure difference alarm value, a high pressure difference alarm is issued.

[0029] When the real-time oil pressure difference value is less than or equal to the fourth pressure difference alarm value, a low pressure difference alarm is issued.

[0030] When the real-time oil pressure difference value is greater than the fourth pressure difference warning value and less than the third pressure difference alarm value, the real-time oil pressure difference value is a normal pressure difference value and no alarm is issued, thereby setting a dynamic oil pressure difference alarm value, reducing the problem of missed or false alarms of the oil pressure difference alarm, and improving work efficiency.

[0031] If the real-time oil pressure difference falls between the first oil pressure difference alarm curve (upper curve) and the second oil pressure difference alarm curve (lower curve), the oil pressure difference is judged to be normal. If the oil pressure difference falls above the first oil pressure difference alarm curve (upper curve) (including the first oil pressure difference alarm curve), the high oil pressure difference alarm takes effect; if the oil pressure difference falls below the second oil pressure difference alarm curve (lower curve) (including the second oil pressure difference alarm curve), the low oil pressure difference alarm takes effect.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A new oil pressure differential alarm strategy, characterized in that: The strategy includes setting a first oil pressure difference alarm curve and a second oil pressure difference alarm curve, obtaining a real-time oil temperature value and a real-time oil pressure difference value corresponding to the real-time oil temperature value, and judging the real-time oil pressure difference value by using the first oil pressure difference alarm curve and the second oil pressure difference alarm curve to trigger a pressure difference alarm mechanism.

2. A novel oil pressure difference alarm strategy according to claim 1, characterized in that: The method for setting the first oil pressure difference alarm curve and the second oil pressure difference alarm curve is: Set the oil temperature axis, obtain the first pressure difference alarm value of the first oil at each oil temperature on the oil temperature axis, obtain the second pressure difference alarm value of the second oil at each oil temperature on the temperature axis, calibrate the first oil pressure difference alarm curve according to the oil temperature axis and the first pressure difference alarm value, and calibrate the second oil pressure difference alarm curve according to the oil temperature axis and the second pressure difference alarm value.

3. A novel oil pressure difference alarm strategy according to claim 2, characterized in that: The first pressure difference alarm value at the same temperature on the temperature axis is greater than the second pressure difference alarm value.

4. A novel oil pressure difference alarm strategy according to claim 2, characterized in that: The method for judging the real-time oil pressure difference value by using the first oil pressure difference alarm curve and the second oil pressure difference alarm curve is: Obtain a third pressure differential alarm value corresponding to the real-time oil temperature value in the first oil pressure differential alarm curve, obtain a fourth pressure differential alarm value corresponding to the real-time oil temperature value in the second oil pressure differential alarm curve, and compare the real-time oil temperature with the third pressure differential alarm value and the fourth pressure differential alarm value, respectively.

5. A novel oil pressure difference alarm strategy according to claim 4, characterized in that: The pressure difference alarm mechanism includes: When the real-time oil pressure difference value is greater than or equal to the third pressure difference alarm value, a high pressure difference alarm is issued; When the real-time oil pressure difference value is less than or equal to the fourth pressure difference alarm value, a low pressure difference alarm is issued; When the real-time engine oil pressure difference value is greater than the fourth pressure difference warning value and less than the third pressure difference alarm value, the real-time engine oil pressure difference value is a normal pressure difference value and no alarm is issued.

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