Active purge system for hybrid vehicle and active purge method for hybrid vehicle
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorsYoung-Kyu Oh, Keum-Jin Park
Life of this patent
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Abstract
The present disclosure relates to an active purge system and an active purge method for a hybrid vehicle, and changes a control method for the throughput of the evaporation gas according to the engine torque according to a change in an optimal operating line, the system efficiency, or the state of charge (SOC) condition of a battery using an active purge unit for pressing the evaporation gas generated by a fuel tank and supplying the pressed evaporation gas to an intake pipe, thereby efficiently purging the evaporation gas.
Claims12
An active purge system for a hybrid vehicle comprising:
- an active purge unit for pressing evaporation gas generated by a fuel tank and supplying the pressed evaporation gas to an intake pipe;
- and
- a control unit for controlling the active purge unit;
- wherein the control unit controls a purge flow rate of the evaporation gas according to change of an engine torque according to a change in an optimal operating line which is an operating line of an engine having maximum system efficiency which is defined as a rate of driving energy of the hybrid vehicle to an amount of fuel used, and wherein the purge flow rate is controlled by adjusting an RPM of a purge pump and an opening amount of a purge valve.
An active purge method for a hybrid vehicle having an active purge system comprising an active purge unit for pressing evaporation gas generated by a fuel tank and supplying the pressed evaporation gas to an intake pipe;
- and a control unit for controlling the active purge unit, the method comprising:
- updating, via the control unit, an optimal operating line of the hybrid vehicle;
- increasing an engine torque compared to a reference torque so as to satisfy the updated optimal operating line;
- and
- controlling the purge flow rate of the evaporation gas according to the increasing control of the engine torque according to a change in the optimal operating line;
- wherein the optimal operating line is an operating line of an engine having maximum system efficiency which is defined as a rate of driving energy of the hybrid vehicle to an amount of fuel used.
Dependencies are inferred from the claim text.