. Public works . as-phalt and even on ordinary refusewater-gas tar. This engine is single-acting and op-erates on the Otto or four-cycleprinciple. In the De La Vergne F Hengine, air only is drawn through theinlet valve during the suction strokeand on the return or compression 121 pounds from Y^ \.o Yi load, poundsfrom Vz load to 54 load—the oil beingcrude oil, distillate or cheap fuel oil,having a thermal value not less than18,000 Much greater econom-ics. It is claimed that with this en-gine the efficiency does not fall of! ma-terially as the load is reduced until theload falls ofT
. Public works . as-phalt and even on ordinary refusewater-gas tar. This engine is single-acting and op-erates on the Otto or four-cycleprinciple. In the De La Vergne F Hengine, air only is drawn through theinlet valve during the suction strokeand on the return or compression 121 pounds from Y^ \.o Yi load, poundsfrom Vz load to 54 load—the oil beingcrude oil, distillate or cheap fuel oil,having a thermal value not less than18,000 Much greater econom-ics. It is claimed that with this en-gine the efficiency does not fall of! ma-terially as the load is reduced until theload falls ofT below 30 per cent of therating. Other claims made for this type arethe low maintenance cost—not exceed-ing 60 cents per 1,000 B. H. P. hoursdelivered; low fuel expense—a 65 will cost 94 cents operating atan average load of 40 H. P. for a 10-hour day; the comparative simplicityof oil engines; absence of stand-bylosses; minimum attendance charge; nopossibility of break down through SECTIONAL VIEW a two-Stage air compressor. The vap-orizer allows the injected fuel to ig-nite immediately on the opening of thespray valve and since the fuel is notintroduced until ignition a relativelyhigh compression may be had withoutdanger of pre-ignition. The combus-tion is claimed to be so complete thatno carbon is deposited even on thevaporizer. The De La Vergne engine isguaranteed by its makers, the De LaVergne Machine Co., foot of East138th street, New York City, to run ona fuel consumption of pounds perB. H. P. per hour at fuel load,
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Keywords: ., bookcentury1800, bookdecade1890, bookidpublicworks3, bookyear1896
