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).
Proposal for a cheaper automatic chassis lubrication system.
| Identifier | ExFiles\Box 141\2\ scan0190 | |
| Date | 12th May 1939 | |
| 1184 To HPS{Horace Percy Smith - Experimental Factory Mgr}/WB.{Mr Brazier/Mr Bell} from Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} c. Da.{Bernard Day - Chassis Design} c. Roy{Sir Henry Royce}/Les.{Ivan A. Leslie} c. Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux} c. Rm{William Robotham - Chief Engineer}/HFP. CHASSIS LUBRICATION. With the object of still further cheapening the automatic chassis lubrication system will you please rig up the following scheme. The main engine oil pump supplies the oil under pressure through a metering valve (say Bijur No.5) and through a cut-off valve which is opened for a definite time (say 5 secs.) every few miles. The time and distance intervals, and valve sizes are arranged to give the correct amount of oil. The cut-off valve is a piston valve so that the valve may be opened by a cam and slowly shut by dash pot action, but will give a sharp cut off and unrestricted orifice the whole time it is open. The piston further acts as a dash pot plunger and contains a non-return valve to enable the cam to open it easily. The cam is driven by the impulse coupling developed for the Tecalemit unit. The cam operating the cut-off valve will be the same as the cam in the impulse coupling but the other way round on the shaft. The whole mechanism will be contained in an aluminium die casting bolted to the engine sump so that any slight leaks do not cause oil loss. The drive will be similar to that on the Tecalemit unit but rather slower so as to allow longer metering periods. It is thought that the viscosity changes in the oil will not matter as the pump gives higher pressures when cold. Will you see what you can make of this scheme, simplicity and cheapness being all important. Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} | ||