Patent ID: 9556828
Date: 2017-01-31
CPC Classifications: F02D,F02M

Claim:
1. A method for operating a tank ventilating system having an adsorption container configured to capture and buffer fuel vapors from a fuel tank, wherein a purge airflow flows through the adsorption container, a regeneration duct that connects the adsorption container to an intake duct, and a pump arranged in the regeneration duct configured to draw purge air out of the adsorption container and add it to intake air in the intake duct, the method comprising: receiving, by a controller, an input from at least one sensor; determining by the controller a density of the purge air that flows in the regeneration duct with based at least in part on the input from the at least one sensor; determining by the controller a purge air mass flow that flows in the regeneration duct based at least in part on the density of the purge air determined based at least in part on the input from the at least one sensor and a predefined pump characteristic of the pump, wherein the predefined pump characteristic of the pump comprises a volume throughput rate of the pump being proportional to a rotational speed of the pump; and controlling, by the controller, the pump and a purge air valve arranged in the regeneration duct based at least in part on at least one of a determined purge air mass flow and the detected hydrocarbon concentration.