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Of the three types of carburetors used on large, high-performance aircraft engines manufactured in the United States during World War II, the Bendix-Stromberg pressure carburetor was the one most commonly found. The other two carburetor types were manufactured by Chandler Groves (later Holley Carburetor Company) and Chandler Evans Control Systems (CECO). Both of these types of carburetors had far too many internal parts, and in the case of the Holley Carburetor, there were complications in its "variable venturi" design. A floatless pressure carburetor is a type of aircraft fuel control that provides very accurate fuel delivery, prevents ice from forming in the carburetor and prevents fuel starvation during negative "G" and inverted flight by eliminating the customary float-controlled fuel inlet valve. Unlike the float-type carburetor fuel system that relies on venturi suction to draw fuel into the engine, a pressure carburetor only uses the venturi to measure the mass airflow into the engine and manages the flow of fuel that is continuously under pressure from the fuel pump to the spray nozzle. In 1936, the first Bendix-Stromberg pressure carburetor (a model PD12-B) was installed and flown on an Allison V-1710-7. == Background == The Bendix Corporation marketed three types of aircraft fuel systems under the Bendix-Stromberg name: : Low performance aircraft engines, and almost all aircraft engines produced before 1940 were typically equipped with conventional float-type carburetor that were not much different, except for size, than those found on automobiles or farm tractors of that time.〔Stromberg Aircraft carburetors p 16〕 : After 1938 high performance aircraft engines were equipped with floatless pressure carburetors, especially those engines used in combat aircraft. These carburetors were a big step forward in technology, and could be looked upon as mechanical counterparts of today's electronic fuel control computers. These floatless pressure carburetors are the topic of this article.〔Schlaifer, Chapter XVIII, pp 509-546〕 : In the last years of World War II, aircraft engines that exceeded a specific horsepower of greater than 1.0, were equipped first with distributed fuel injection and later with direct injection, which became the fuel system of choice. Using the same principles as the pressure carburetor to measure air flow into the engine, the distributed fuel injection system used individual fuel lines to each cylinder, injecting the fuel at the intake port. The direct-injection systems differed only in that it injected the fuel directly into the cylinder head, much like a diesel engine fuel system. These fuel control devices were individually sized and calibrated to fit almost all piston aircraft engines used by both civil and allied military aircraft made in the post war era. These fuel injection systems are found on high performance general aviation piston engines that continue flying into the 21st century.〔Stromberg carburetor application spreadsheet, author's collection〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Bendix-Stromberg pressure carburetor」の詳細全文を読む スポンサード リンク
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