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).
Side injection and combined pump and injector systems, detailing nozzle configurations and performance results.
| Identifier | ExFiles\Box 133\3\ scan0072 | |
| Date | 8th March 1939 | |
| -3- Side Injection - Cont'd.{John DeLooze - Company Secretary} A differential nozzle using three horizontal holes .016" dia. x .032" long x 45° angle showed a power of 86.0 lbs/sq.in. with a specific cons. of .538 lbs/BHP/Hr. Combined Pump and Injector. An original power equal to the Bosch system was obtained by using a Bosch nozzle with 8 holes .010" dia. x .025" long x 140° cone angle. Two types of inlet port were tried, viz:- (1) Annular groove round inside of barrel, and (2) A single hole through side of barrel. The latter arrangement gave approximately 5 MEP more power due presumably to the slower rate of injection experienced with this arrangement suiting combustion conditions in the cylinder. The rate of injection of this system is the same as the Bosch. The power was now 94.8 lbs/sq.in. at .495 lbs/BHP/hr. consumption, and a consumption of less than .400 was experienced at all speeds, for MEP's less than 73 lbs/sq.in. The maximum pressure remained constant throughout the speed range without any variation in injection timing being necessary. Rm{William Robotham - Chief Engineer}/Ed.{J. L. Edwards} | ||