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).
Mr. Royce's proposal to experiment with a hot spot induction system to improve fuel vaporization and cold starting.
| Identifier | Morton\M2.4\ img031 | |
| Date | 15th December 1920 | |
| To- HS.{Lord Ernest Hives - Chair} from E.{Mr Elliott - Chief Engineer} Copy to H.{Arthur M. Hanbury - Head Complaints} EFG. ORIGINAL RECEIVED 17 DEC 1920 XH305 RE HOT SPOT INDUCTION SYSTEMS AND FOG MIXTURE. X4298 In connection with the new chassis, Mr. Royce has for some time proposed to try exhaust heat for the induction system. It is to be applied in the manner now known whereby a small part of the induction system where the petrol is likely to accumulate is made very hot, and it is supposed that the petrol is boiled off into vapour, and shortly afterwards condenses into a kind of fog in which condition it is easily distributed in an even manner to the cylinders. The duration of the hot spot is so small that its effect in heating the charge is supposed to be inappreciable. For the purpose of obtaining an immediate test of this principle, Mr. Royce would like an experiment made on the 40/50 H.P. at the earliest possible moment, in which a large stream of hot exhaust gas is passed through the throttle valve jacket; enough to make it very hot. This experiment is also of interest in view of Mr. Platford's memo KP5/F13/12/20 on the difficulties of starting in cold weather. E.{Mr Elliott - Chief Engineer} | ||