Hydraulics of Fuel-Injection Pumps for Compression-ignition Engines (1932)
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ations the stem area exposed to the hydrauHc pressure before (6) and (11) fit the experimental results more closely, the stem lifted to the area exposed after the stem lifted while at the higher closing pressures the curve accord- was 0.70 for the injection valve used in the tests. ing to equation… … Time, second Figure 13.—Effect of valve closing pressure on stem lift and fuel pressure at low pump speed. Tube length=34 inches; inside tube diameter=0.076 inch; pump speed=470 r. p. m.; orifice diameter=0.020 inch high pump speeds at low injection valve closing pres- sures, and, consequently,…
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