From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Test procedure to diagnose excessive oil flow in an engine by measuring the oil return rate.
| Identifier | ExFiles\Box 178\1\ img150 | |
| Date | 19th May 1926 | |
| - 18 - Hs{Lord Ernest Hives - Chair}/ACL/T19.5.26. be arranged for the test. It must be remembered that the oil supply to the gears and rockers must be stopped. Commence the test with the apparatus arranged as shewn in Fig. 4. The main tank A must be full of oil. Run the engine until the temperature of the oil in this tank is approx. 60°C which can be ascertained by an ordinary transmitting thermometer. When this temperature is reached the engine must be run at the speed desired - either 1000 or 1500 R.P.M. - and the oil tanks moved into the position shewn in Fig. 5. Immediately the oil starts to enter the measuring tank 'B', the time for it to fill should be taken with a stop watch. This tank can be of any convenient capacity - a quart is found to be a useful size. When measure 'B' is full return tanks to the position shewn in Fig. 4. From the measurements obtained we can determine the flow in PTS/MIN. and compare this with the curve given earlier in this report. During the test the oil pressure should be noted to see that it is approx. the same as given by the car previously. The above simple test when carried out on an overoiling car enables us at once to determine with very little trouble if the fault is due to excessive oil flow. Should this be the case, the factors affecting oil flow have been enumerated, it remains to apply this knowledge to effect a cure. Hs{Lord Ernest Hives - Chair}/ACL. | ||