Systems and methods for determining a state of deterioration of engine oil using multiple preselected oil properties

摘要

Systems and methods for automatically evaluating the useful life of an engine oil based on data corresponding to a plurality of preselected key oil properties. The evaluation includes determining, in connection with each of the pre-selected key oil properties, a first current measured oil property value, a first reference oil property value, a first deterioration-limit value, and a first weighting factor. The evaluation also includes determining a single index value, indicating a state of deterioration of the engine oil, in a calculation using each of the values and factors.

主权项

1. A system, comprising:
a plurality of sensor devices comprising a first sensor device and a second sensor device sensing distinct properties of oil used in a vehicle and generating first sensor-device data and second sensor-device data respectively; and a processing device configured to receive the first sensor-device data from the first sensor device and determine, regarding a first oil property of the distinct properties for the oil used in the vehicle, a first set of oil-property characteristics comprising:
a first presently-measured oil-property value (Pt1) based on the first sensor-device data;a first reference-oil-property value (Po1);a first deterioration-limit value (Pd1); anda first weighting factor (w1) representing a first pre-determined level of importance assigned to the first oil property; wherein the processing device is further configured to receive the second sensor-device data from the second sensor device and determine, regarding a second oil property of the distinct properties for the oil used in the vehicle, a second set of oil-property characteristics, comprising:
a second presently-measured oil-property value (Pt2) based on the second sensor-device data;a second reference-oil-property value (Po2);a second deterioration-limit value (Pd2); anda second weighting factor (w2) representing a second pre-determined level of importance assigned to the second oil property; and wherein the processing device is further configured to generate, using at least the first set of oil-property characteristics and the second set of oil-property characteristics, a system output comprising a single index value indicating a state of deterioration of the oil used by the vehicle, and the generating including performing at least one of a first function and a second function for determining an oil-deterioration index (ODI) as the single index value, the first and second functions being, respectively, as follows:ODI=1∑i⁢wi⁢(∑i⁢[(Pti-P0⁢i)(Pdi-P0⁢i)]2⁢(wi));andODI=1∑i⁢wi⁢(∑i⁢[(Pti-P0⁢i)(Pdi-P0⁢i)]2⁢(wi)).