1、 FORD LABORATORY TEST METHOD BJ 124-01 Date Action Revisions 2001 07 25 Revised Editorial no technical change A. Cockman 1992 02 03 Printed copies are uncontrolled Page 1 of 8 Copyright 2001, Ford Global Technologies, Inc. ENGINE OIL FILTERABILITY TEST Application This test is designed to determine
2、the tendency of an oil to form a precipitate which can plug an oil filter. It simulates a problem which can be encountered in a new engine run for a short period of time followed by a long period of storage with some water and blowby condensate in the oil. The procedure involves testing an oil as-re
3、ceived (termed “new oil“) and then after the oil has been subjected to hot and cold environments in the presence of moisture (termed “environmentalized“). Apparatus Required Blender Base Blender with low speed of 1800 rpm +/- 10 % unloaded. Waring Model 7011 two-speed blender base or equivalent. Con
4、tainer Waring MC-3, 50 - 250 m “mini-container“ or equivalent. Syringe 1000 microlitre. Glass Jar 60 mL glass jars. Oven Oven with fan and capable of maintaining 70 +/- 2 C. Thelco Model 18 or equivalent. Buret 25 mL (refer to Note 1). Filter Holder Millipore XX30-012-00; effective filters are 0.7 c
5、m2 (refer to Note 2). Stopwatch Capable of timing sequential events. Note 1: To ensure that there are no restrictions to the oil flow in the buret, a PTFE (Teflon) stopcock with a minimum opening of 1.8 mm must be used. Likewise, the tip of the buret must have an opening of 1.8 mm or greater. FORD L
6、ABORATORY TEST METHOD BJ 124-01 Page 2 of 8 Copyright 2001, Ford Global Technologies, Inc. Note 2: The effective filter area for each new filter holder is calculated by measuring the flow times and calculating the average flow time for a reference fluid (FR No. 1) of known average flowrate. Equation
7、 No. 1 is then solved for the area of the filter. This calculated filter area is used in subsequent calculations of flow rates measured with the filter holder. Refer to the sample calculation and Table 1. This procedure is sued to calibrate the system for each new filter holder or whenever changes a
8、re made in the air pressure regulator, pressure gauge, or batch of filter paper (AC MS-4275). To compensate for possible variations in pressure gauges, a slight adjustment in air pressure (+/- 7 kPa) may be made to keep the average flow time of Ford Reference Oil No. 1 in the range of 5.5 to 6.5 sec
9、onds. The pressure must be held constant after this adjustment. Materials Required Dry Ice Compressed Air Regulated to 69 kPa. Automotive Oil Filter Paper 40 micrometre AC MS-4275 - (refer to Note 3). Deionized or Distilled Water 20 micromhos/cm at 25 C max conductivity (ASTM D 1125). Reference Oils
10、 Refer to Note 3. Note 3: Information on availability of reference oils (FR No. 1 and FR No. 2) and AC MS-4275 filter paper can be obtained from: Fuels and Lubricants Section Engine Product and Manufacturing Engineering Engine Division, EEE Bldg. 21500 Oakwood Blvd. Dearborn, Michigan 48121 Conditio
11、ning and Test Conditions All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/- 2 C and 50 +/- 5 % relative humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise specified. FORD LABORATORY TEST METHOD B
12、J 124-01 Page 3 of 8 Copyright 2001, Ford Global Technologies, Inc. Procedure 1. Tests on the engine oil(s) must be run in duplicate at 23 +/- 2 C along with at least one test with each of the Ford Reference Oils. . New oil flowrate is to be checked at 5, 10, 15, 20, and 25 mL. . “Environmentalized“
13、 oil flowrate is to be checked at 5, 10, 15, 20, and 25 mL. . A plot of the flowrates vs oil volume shall be prepared for each run. . Percent change in flowrate shall be determined each test. The results of the Ford Reference Oils (after environmentalization) must be similar (+/- 10 %) to those show
14、n below: mL FR No. 1 FR No. 2 Flowrate (s) (cm2) 0.95 0.1 or less Change in Flowrate (%) 20 95 2. “Cold“ Environment - mix 49.7 g of test oil, 0.3 g (0.3 mL with the microliter syringe) of deionized water and about 10 g of dry ice for 30 s at low speed in a Waring “mini-container.“ The top of the co
15、ntainer should be loosely covered to prevent oil spattering while allowing rapid vaporization of the dry ice. 3. “Hot“ Environment - transfer the sample to a 60 mL wide mouth glass bottle and place the uncapped bottle in an oven at 70 C for 30 minutes. Remove from the oven and allow to cool to 23 +/
16、- 2 C. 4. Store at 23 +/- 2 C for 48 +/- 2 h before determining the filterability. Filterability Note: Some form of safety shield should be utilized during this test. 5. The apparatus, a 25 mL buret, filter holder with automotive oil filter paper (AC MS-4275), and a source of 69 kPa air pressure, is
17、 shown in Figure 1. Discs of filter paper are cut to fit the holder and installed with the tan colored, resin-coated side down. Note: In step 6 and 7, the temperature of the oil and buret should be 23 +/- 2 C. 6. The new oil flowrate is determined by placing a sample of new oil in the buret and syst
18、em is pressurized to 69 kPa. Fifteen mL of oil are forced through the filter to saturate the filter with oil and remove any air bubbles. The air line is disconnected and the buret is filled with new oil to a level 10 - 20 mm above the “O“ mark. The system is then repressurized to 69 kPa, the stopcoc
19、k is opened, and the flow time for each successive 5 mL of oil is measured between the “O“ and 25 mL graduations. FORD LABORATORY TEST METHOD BJ 124-01 Page 4 of 8 Copyright 2001, Ford Global Technologies, Inc. The flowrate for each 5 mL portion of oil is calculated using Equation (1). (1) Flowrate
20、= _A_ (B) (C) Where A = Volume of oil B = Flow time C = Area of filter (ref. to “calculation“ section of this FLTM). 7. To determine the environmentalized oil flowrate, the flow times of the new oil are first determined as outlined in Step 6. Using the same filter disc and filter holder, the new oil
21、 level in the buret is reduced to the lowest level which allows no air bubbles below the stopcock. The air line is disconnected and the buret is filled with a well-mixed sample of environmentalized oil to a level 10 - 20 mm above the “O“ mark. The system is pressured to 69 kPa, the stopcock is opene
22、d, and the flow time for each successive 5 mL of oil is measured between the “O“ and 25 mL graduations. The flowrate for each 5 mL portion of environmentalized oil is calculated using Equation (1). 8. The percent decrease in flowrate of the environmentalized oil relative to the new oil is calculated
23、 from the final oil flowrates (between 20 and 25 mL measured with the same filter disc) using Equation 2. Equation (2) Percent change in flowrate (b) - (a) x 100 (a) Where a = Final new oil flowrate b = Final environmentalized oil flowrate Calculations Calculation of Effective Filter Area: The filte
24、r area is calculated from Equation No. 1 using the average flow time for Ford Reference Oil No. and a flowrate of 1.21 mL/S.cm2. Flowrate = (Volume of Oil)/(Flow time) (Area of Filter) 1.21 mL/s.cm2 = (5mL)/(6.53 s) (Area of Filter) Area of Filter = 0.633 cm2 FORD LABORATORY TEST METHOD BJ 124-01 Pa
25、ge 5 of 8 Copyright 2001, Ford Global Technologies, Inc. TABLE 1 - REFERENCE OIL FLOWRATE FR#1 Volume Flow Time Flowrate ML s mL/s.cm2 5 6.36 1.25 10 6.45 1.23 15 6.62 1.20 20 6.65 1.19 25 6.56 1.19 _ Average 6.53 1.21 _ Measurement of Flow Times The flow times shown in the example in Table 2 are fo
26、r the 5 mL portion of oil ending at the indicated volume. Flow times were measured with a digital stopwatch capable of timing sequential events (i.e., the time for the new oil to flow from the 5 mL mark to the 10 mL is 6.75 s). If the stopwatch used gives only elapsed time, then the time at the prec
27、eding mark must be subtracted to obtain the time for the interval (i.e., 12.36 - 5.61 = 6.75 s). Example TABLE 2 - FLOW TIMES AT INDICATED VOLUMES Factory Fill Volume New Factory Fill Envmtlzd. Sample ML s s 5 5.61 7.60 10 6.75 11.24 15 6.77 16.00 20 6.81 22.01 25 7.16 30.99 Calculation of Flowrate:
28、 The flowrate is calculated from Equation (1). Thus for the first 5 mL or new oil, the flowrate is: Flowrate = (A)/(B) (C) = (5 mL)/(5.61 s)(0.633 cm2) = 1.41 mL/s.cm2) FORD LABORATORY TEST METHOD BJ 124-01 Page 6 of 8 Copyright 2001, Ford Global Technologies, Inc. Where A = Volume of oil B = Flow t
29、ime C = Area of filter The calculated flowrates obtained using Equation (1) for the rest of the example are shown in Table 3. Example TABLE 3 - FLOWRATE AT INDICATED VOLUMES Factory Fill Volume New Factory Fill Envmtlzd. Sample ML s mL/s.m2 5 1.41 1.03 10 1.16 0.70 15 1.16 0.49 20 1.15 0.36 25 1.10
30、0.25 Calculation of Percent Change in Flowrate: The percent change in flowrate is: Percent Change = (b) - (a) (a) = 0.25 - 1.10 1.10 = - 77.3 Where a = Final new oil flowrate b = Final oil flowrate Chemicals, materials, parts, and equipment referenced in this document must be used and handled proper
31、ly. Each party is responsible for determining proper use and handling in its facilities. FORD LABORATORY TEST METHOD BJ 124-01 Page 7 of 8 Copyright 2001, Ford Global Technologies, Inc. Engine Oil Filterability Test Candidate Oil Test Report Candidate Oil Identification _ Date Test Laboratory Comple
32、ted: FLOWRATES (mL/s.cm2) FLOWRATES (mL/s.cm2) Environmentalized Environmentalized Oil Volume (mL) New Oil Oil New Oil Oil 5 10 15 20 25 Change in Flowrates, Percent (b) - (a) (a) x 100 = % % FORD LABORATORY TEST METHOD BJ 124-01 Page 8 of 8 Copyright 2001, Ford Global Technologies, Inc. Engine Oil Filterability Test Reference Oil Test Report Reference Oil Identification _ Date Test Laboratory Completed: FLOWRATES (mL/s.cm2) FLOWRATES (mL/s.cm2) Environmentalized Environmentalized Oil Volume (mL) New Oil Oil New Oil Oil 5 10 15 20 25 Change in Flowrates, Percent (b) - (a) (a) x 100 = % %
