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).
Scheme for an exhaust-heated fuel chamber to improve engine starting and performance.
Identifier | ExFiles\Box 50\3\ Scan153 | |
Date | 1st June 1921 | |
Oyl - G 18821 Sheet #2. S.A.E. Journal for June, 1921 (page 35). A further development of the scheme is to run the fuel out of the pipe into an exhaust heated chamber. We have fixed such a device on a car, draining the fuel into jackets around each exhaust downtake - each jacket holds about 1/4 pt. of fuel. The exhaust downtakes and jackets become warm in two or three minutes after starting up and boil off the accumulated fuel very vigorously. Whether this scheme would do away with the necessity of applying any heat we cannot say. Dorris uses a very considerable hot-spot in addition, but possibly the carburetter used in his tests (apparently a Stromberg) does not give as good atomization as the R-R.{Sir Henry Royce} If such a device can be used with the existing manifold, it appears to be a very safe and economical way of taking care of cars already on the road. It implies no danger of detonation, no loss of power, and appears to avoid the very condition which leads to carbonizing of cylinders and crankcase dilution - namely, the slugs of liquid heavy ends which are thrown irregularly into the cylinders when starting from cold in such quantities that it is impossible for the cylinders to burn them. Yours truly, MO/G ROLLS-ROYCE OF AMERICA, Inc. Per M.{Mr Moon / Mr Moore} Olley | ||