A system (10) to control fuel-pressure (12) of fuel (14) delivered to a fuel-injector (16) includes a fuel-pump (24), an absolute-pressure-sensor (22), a pressure-regulator (30), and a controller (40). The fuel-pump (24) is operable to vary fuel-pressure (12) of fuel (14) output by the fuel-pump (24). The absolute-pressure-sensor (22) indicates an absolute-pressure (26) of the fuel (14). The pressure-regulator (30) limits the fuel-pressure (12) by releasing fuel (14) output by the fuel-pump (24) when the fuel-pressure (12) exceeds a tank-pressure (34) of the fuel-tank (32) by a pressure-threshold (36). The controller (40) is in communication with the absolute-pressure-sensor (22) and the fuel-pump (24). The controller (40) periodically operates the fuel-pump (24) in a test-mode (42) where the fuel-pressure (12) is such that the pressure-regulator (30) releases fuel (14) output by the fuel-pump (24), estimates a barometric-pressure (18) outside of the fuel-tank (32) based on the absolute-pressure (26) while the pressure-regulator (30) is releasing fuel (14) output by the fuel-pump (24) into the fuel-tank (32), and operates the fuel-pump (24) in a normal-mode (44) where the fuel-pressure (12) is controlled so the absolute-pressure (26) corresponds to a desired-pressure (46) that is determined based on the barometric-pressure (18).
BAROMETRIC PRESSURE COMPENSATED FUEL PRESSURE CONTROL SYSTEM
LUFTDRUCKAUSGEGLICHENES KRAFTSTOFFDRUCKSTEUERUNGSSYSTEM
SYSTÈME DE RÉGLAGE DE PRESSION DE CARBURANT À COMPENSATION DE PRESSION BAROMÉTRIQUE
16.10.2019
Patent
Elektronische Ressource
Englisch
IPC: | B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen |
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