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).
Summary of a 100-hour contract test on a 4-stroke compression ignition engine.
| Identifier | ExFiles\Box 133\3\ scan0061 | |
| Date | 6th March 1939 | |
| Rm{William Robotham - Chief Engineer}/Ed.{J. L. Edwards}4/MH.{M. Huckerby}6.3.39. SUMMARY OF SECOND 100 HOURS CONTRACT RUNNING ON C.I. 4-STROKE UNIT. Introduction. Running was commenced on the 17.7.31 and completed on the 5.10.32. Range of Investigation. (A) Original Cylinder. (1) Development of nozzles and injectors. (2) Fuel injection pump experiments. (3) Rotational air swirl tests. (4) Volumetric efficiency. (5) Mechanical efficiency. (6) Effects of injection timing on starting. (7) Ramming Pipes. (8) Piston experiments. (9) Reduced compression ratio experiments. (B) Modified Cylinder. (1) Power loss occasioned by modified cylinder. (2) Volumetric efficiency. (3) Compression pressures. (4) Mechanical efficiency. General Conclusions. (1) Integral nozzle valve and seat construction is preferable as it gives lower injection pressures with a higher BMEP. This is the construction employed on the Bosch injector. (2) Less spray divergence is required if rotational swirl is employed. | ||