28-10-2010, 02:50 PM
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ROTARY DISTRIBUTOR DIESEL FUEL INJECTION PUMP
Stanadyne, Inc.
Diesel Systems Division
Windsor, Connecticut
National Historic Engineering Landmark
HISTORY
The year was 1947. The place was Hartford, Connecticut. Diesel power was about to make an historic move forward. At that time, the world of high-speed diesel power in the U.S. was very limited. Less than 5 percent of all engines being built, even for nonautomotive applications, were diesels. Diesel power had proven to have real advantages. But for many applications, the price was prohibitive. A small or medium-size high-speed diesel engine simply cost too much compared to its gasoline counterpart. The high cost problem centered around the diesel fuel injection systems available at the time. A simpler, less expensive form of fuel injection was needed before diesels could compete effectively in the small or medium-size high-speed engine field. The answer came from a man who had learned about diesel engines the hard way – by installing and Rotary Distribution Principle maintaining diesel-electric generator sets in New York City. His name was Vernon Roosa. And he brought his answer to Stanadyne’s Hartford Division. Roosa threw aside the traditional in-line injection pump with its pumping element for each engine cylinder. Instead, he used a single pumping unit to feed all the cylinders. Thus, the new pump had the same number of parts regardless of the number of cylinders.
