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).
Various engine control methods, including sampling, ignition, boost, and carburation.
| Identifier | ExFiles\Box 41\4\ Scan025 | |
| Date | 29th January 1930 guessed | |
| - 2 - 9. Connection to two middle cylinders in a line engine. 10. Collection of the first sample from one cylinder and the second from another cylinder. 11. Slightly raising compression in cylinder from which sample is taken. 12. Sampling valve operating in the water jacket for cooling. 13. Interconnection of spark advance with starting switch. 14. In carburation control use of thermostat to lock the control when engine is warm. 15. Use of a supplementary throttle to prevent detonation, improve atomisation etc. Might be used for boost control. In connection with these it is only necessary to state:- 1. Mr. Stanton had trouble in lubrication and cooling of the disc valve and prefers at present the piston valve with means of pumping air back towards the cylinder. 2. Electrical valveless operation is new to us and apparently has not been developed by Mr. Stanton. It seems to offer great possibilities. 3. Taking a third sample from the end of the induction stroke has proved unnecessary. The induction vacuum is good enough and is described in Fig. 6a of the French Patent. 4. Use of a supplementary throttle might be the best way of boost control on an aero engine. In this latter case where the altitude changes considerably it is necessary to keep the intake vacuum out of the question and use pressure sample only as described in Figs. 24-27 of French patent and sketch SK-382. 5. If the Stanton control is used for ignition in addition to the ordinary advance governor, the governor has no effect whatever so long as the pressure-control works normally, since the pressure-control will always set the ignition at the point giving the best indicator diagram. But if the cylinder from which samples are taken is not working right (missing or leaking valves) the tendency of the Stanton control to fully retard the spark is partly overcome by the advance governor. 6. Use of a "servo" mechanism using oil or air pressure between the control mechanism and the ignition advance is described in the French Patent. (Similar to R.R. oil relay but not nearly as good). Carburation Control. - The control of carburation, and exhaust heat to intake, are both shown actuated by the same mechanism. - continued - | ||