METHOD AND SYSTEM FOR MEASURING ENGINE OIL DETERIORATION

• US 20130047708A1
• Filed: 12/11/2011
• Published: 02/28/2013
• Est. Priority Date: 08/30/2011
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group), Korea Research Institute of Chemical Technology
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group), Korea Research Institute of Chemical Technology
• Inventors: Oh, Ki Hwan, KIM, Won Gyu, Chung, Keun Woo, Kim, Young-Wun
• Granted Patent: US 8,752,415 B2
• Time in Patent Office: Days
• US Class Current: 73/53.05
• CPC Class Codes: G01N 21/3577 for analysing liquids, e.g. polluted water
• CPC Class Codes: G01N 21/359 using near infrared light
• CPC Class Codes: G01N 33/2876 Total acid number
• CPC Class Codes: G01N 33/2888 Lubricating oil characteristics, e.g. deterioration lubricating properties G01N33/30

Abstract

The present invention relates to a method of measuring engine oil deterioration, including measuring the first absorbance of engine oil using near infrared at a wavelength of 1000 nm or more, measuring the second absorbance of the engine oil during use using near infrared at the wavelength, and comparing the first absorbance and the second absorbance of the engine oil, so that the engine oil may be determined to be in a state of deterioration when the second absorbance may be at least 1.5 times the first absorbance, and to a system for measuring engine oil deterioration therefor.

Claims

1. A method of measuring engine oil deterioration, comprising:

measuring a first absorbance of engine oil using near infrared at a wavelength of 1000 nm or more;

measuring a second absorbance of the engine oil during use using near infrared at the wavelength; and

comparing the first absorbance and the second absorbance of the engine oil, so that the engine oil is determined to be in a state of the engine oil deterioration when the second absorbance is at least 1.5 times the first absorbance.

2. The method of claim 1, wherein the near infrared has a wavelength of 1100˜

1300 nm.

3. The method of claim 1, wherein the measuring the first absorbance is performed by measuring an initial absorbance upon injection of the engine oil into a vehicle.

4. A method of measuring engine oil deterioration, comprising:

measuring a first absorbance of engine oil using near infrared at a wavelength of 1000 nm or more;

measuring a second absorbance of the engine oil during use using near infrared at the wavelength;

multiplying a difference between the first absorbance and the second absorbance of the engine oil by a square of a daily average mileage, thus determining a determination value; and

determining the engine oil to be in a state of the engine oil deterioration when the determination value is 500 or more.

5. The method of claim 4, wherein the engine oil is determined to be in the state of the engine oil deterioration when the second absorbance of the engine oil during use is at least 1.5 times the first absorbance.

6. A system for measuring engine oil deterioration, comprising:

an absorbance measurement part for measuring a first absorbance of engine oil using near infrared at a wavelength of 1000 nm or more; and

a deterioration determination part for determining a ratio of increase of a second absorbance relative to the first absorbance of the engine oil, so that the engine oil is determined to be in a state of the engine oil deterioration when the ratio of increase is at least 1.5.

7. The system of claim 6, wherein in the absorbance measurement part the near infrared has a wavelength of 1100˜

1300 nm.

8. The system of claim 6, wherein the first absorbance is an initial absorbance upon injection of the engine oil into a vehicle.

9. A system for measuring engine oil deterioration, comprising:

an absorbance measurement part for measuring a first absorbance of engine oil using near infrared at a wavelength of 1000 nm or more;

a mileage determination part for determining a daily average mileage; and

a deterioration determination part for determining a determination value by multiplying a difference between the first absorbance and a second absorbance of the engine oil by a square of the daily average mileage, so that the engine oil is determined to be in a state of the engine oil deterioration when the determination value is 500 or more.