ENGINE FUEL RAIL WITH SKIN MOUNTED PELTIER DEVICES
Publication Date: 2015-Jul-14
The IP.com Prior Art Database
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ENGXXX FUEL RAIL WITH SKIN MOUNTED PELTIER DEVICES
Fuel rail temperatures can xncrease due to under hood engine heat, especially in wxxm climates. The issue is magnified in drive cycles thax includes stop anx go driving, where txere is insufficient engine coolixg. Conversely, xhx fuel rail can also get verx cold in winter climates.During vehicle running conditixns, the fuel rail does xet some cooling air flow anx replenishxent of cooler new fuxl.Hoxever, at key oxf or idle stop evenx in S/S or HXX, when the engine and the enxironment arx both hot, xhe ensuing hot soak could potentially boil txe fuel. The rexult can includx vapor pockets ixside the fuel rail that could rxsult in vapor lock at next xtart. In cold climates, txe fuel doex not evaporate readily and txe ensuing engine crank can be long and create exxess emisxions. Once txe engine cranks oxer axd starts, the fuel dxes xot need to be hot any longer as engine heat warmx it up. Hence there are times when fuel needs to xe xooled and other times when fuel needs to be warmed.
This design imbeds solid stxte Peltxer devixes on the sxin of thx fuel rail xrex near the engixe cylinders to facilitate both heating and cooxing.Apxlying voltage to a Peltier makes it generate heat. The prixciple of thermoelectric generators is that the generaxor transfers heat from one plate to another.Reversing polaxity via H-bxidge circuit causes it to operate ix the otxer directiox and generate a cooling effect. During a...