Abstract:
Die Erfindung betrifft eine Tankentlüftungsvorrichtung zum Einbringen zwischen einen Kraftstofftank (1) und eine Verbrennungskraftmaschine (3), umfassend einen Kraftstoffspeicher (2) mit einem Aktivkohlebett zum Speichern von Kraftstoff, eine Belüftungsleitung (9) zum Zuführen von Spülgas in den Kraftstoffspeicher (2), eine Kraftstoffleitung (4) zum Transport von Kraftstoff aus einem an die Tankentlüftungsvorrichtung (10) angeschlossenen Kraftstofftank (1) in den Kraftstoffspeicher (2), eine Entlüftungsleitung (5) zum Transport von Gasen aus dem Kraftstoffspeicher (2) zu einer Verbrennungskraftmaschine (3), wobei im Kraftstoffspeicher (2) in einem direkten Strömungsweg (11) des Kraftstoffes zwischen der Kraftstoffleitung (4) und der Entlüftungsleitung (9) mindestens ein Thermoelement (8) angeordnet ist
Abstract:
To improve environmental protection from hydrocarbon emissions particularly from vehicles a heater (1) for fluids comprising heating elements (2, 2') of an electrically conductive monolith, wherein the heater (1) comprises a passageway for the fluid to be heated with a defined flow direction of the fluid during heating operation, the heater (1) comprising at least two heating elements (2, 21) arranged side by side inside the passageway, so that they are arranged in parallel with respect to the fluid flow, is proposed improved in that one of the at least two heating elements is a controlled heating element (21), which has a slightly larger heating power, and a temperature sensor (19) is provided at or close to the downstream end (23) of the controlled heating element (2'), and wherein the temperature sensor (19) is connected to a control means (11) for temperature control during heating operation of the heater (1); and a method of operating such a heater (1).
Abstract:
An invention is disclosed for efficiently improving the working capacity and useful service life of an adsorber system by selectively heating the adsorbent towards the purge outlet of the fluid path.
Abstract:
An evaporative emission control canister system comprises an initial adsorbent volume having an effective incremental adsorption capacity at 25 °C of greater than 35 grams n- butane/L between vapor concentration of 5 vol% and 50 vol% n-butane, and at least one subsequent adsorbent volume having an effective incremental adsorption capacity at 25 °C of less than 35 grams n-butane/L between vapor concentration of 5 vol % and 50 vol % n- butane. The evaporative emission control canister system has a two-day diurnal breathing loss (DBL) emissions of no more than 20 mg at no more than 210 liters of purge applied after the 40 g/hr BETP butane loading step.
Abstract:
A fuel vapour storage and recovery apparatus for the fuel system of a motor vehicle having an internal combustion engine (1) with an exhaust pipe (2) and a fuel tank (3) containing a fuel vapour/air mixture (4) above a liquid fuel (5), the exhaust pipe (2) being close to the fuel tank (3), said apparatus comprising: - a vapour storage canister (6) having a fuel vapour adsorbent material (7) therein, - thermal insulation means (8) for thermally insulating at least a portion of the fuel tank (3) from the heat generated by the exhaust pipe (2), and - a heat exchanger (9), wherein the heat exchanger (9) is adapted to heat to a purge temperature air guided there through by absorbing heat from the thermal insulation means (8).
Abstract:
A method for reducing hydrocarbon emissions from automotive evaporative emissions control systems comprising steps of : contacting a vented fuel vapor stream from a fuel tank (1) with a first passive purge canister bed (5), the passive purge canister bed comprising a vapor adsorbent material and including a passive purge vapor inlet and a passive purge vapor outlet for vapor stream flow,- contacting a vapor stream from the passive purge vapor outlet with an active purge canister bed, the active purge canister bed (2) comprising a vapor adsorbent material; contacting the active purge canister bed with mechanically convected purge air, wherein the mechanically convected purge air is prevented from flowing through the passive purge canister bed; and contacting the passive purge canister bed with fresh purge air drawn passively by the fuel tank through the passive purge vapor outlet without first contacting said active purge canister bed.