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).
Article discussing a swashplate-operated injection pump for a Diesel Dodge Truck, with an advertisement for Timken tubing from Ryerson Steels.
| Identifier | ExFiles\Box 133\3\ scan0020 | |
| Date | 1st December 1938 | |
| 742 DIESEL FOR DODGE TRUCK usual flexibility and to assure smoke-less operation. The injection pump is of the swashplate-operated type, the axes of its six pump cylinders being parallel with and in a circle about the axis of the pump drive shaft. The six pistons are driven through tappets which are held by spring pressure in contact with a single rotating swash plate. Each cylinder is connected through a port to a central fuel supply chamber. Rotating within the supply chamber is a shaft carrying a valve with a tri-angular-shaped section or land which, in passing over each port, closes it. The port is uncovered during the intake stroke of the pump piston and covered only during that portion of the delivery stroke when injection is desired. Sectional view of the injection pump with its injection-timing and quantity-limiting governors The rotating shaft and valve are so arranged that they may be displaced both axially and angularly, the latter displacement creating a change in the phase relationship of the rotating valve and the engine crankshaft. Since the land is triangular in shape, axial movement of the shaft and land controls the length of time during which the port is covered and hence the length of time during which injection takes place. The shaft is moved axially by a mechanical connection to the accelerator pedal, thus controlling the amount of fuel delivered to the engine. It is also subject to control by a centrifugal governor, so that the maximum desirable fuel quantity for any engine speed is not exceeded. Angular or phase displacement of the rotary valve is controlled by a second set of governor weights. As the engine speed increases, the angular position of the rotating land is set ahead so that in turning, it closes each port sooner than it otherwise would. Since the rotary valve is not a power-transmitting unit, only little friction has to be overcome by the governor in making the phase adjustments. Operating results obtained during the development period are said to have been most satisfactory, and fuel mileage records are said to show an improvement of at least 40 per cent over the performance of gasoline trucks in comparable service. Indications are that there will be no appreciable difference between maintenance costs with the two types of power. [Advertisement Section] RYERSON CERTIFIED STEELS Timken Quality Tubing Immediate Ryerson Shipment Timken Tubing is not an ordinary steel mill product, but a specialty manufactured to meet exacting requirements. As large users of tubing for the cones and cups of bearings, Timken definitely realizes the value of uniform chemical and physical characteristics, and carefully controls these factors to develop a dense close structure that assures good machinability. Timken Quality is safeguarded through every step of manufacture. Complete, modern mill equipment is skillfully manned by operators of long experience, and an unusually strong staff of metallurgists is equipped with the most complete laboratory facilities. Each heat of steel is subject to frequent tests from furnace to finished product, thus insuring uniform high quality whether you order a single tube or a carload. Ten strategically located Ryerson plants offer you Immediate Shipment of Timken Tubing. Rigid inspection systems, special storing methods, experienced crews, and unsurpassed transportation facilities assure prompt, intelligent service. Draw on the Ryerson plant nearest you. JOSEPH T. RYERSON & SON, Inc. Plants at: Chicago, Milwaukee, St.{Capt. P. R. Strong} Louis, Cincinnati, Detroit, Cleveland, Buffalo, Boston, Philadelphia, Jersey City. RYERSON Certified STEELS Automotive Industries | ||