Method for controlling idle stop mode in hybrid electric vehicle
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorYong Kak Choi
Life of this patent
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Abstract
A method for controlling an idle stop mode in a hybrid electric vehicle includes performing an engine RPM lift-up control to raise an engine RPM if a deceleration is less than a medium deceleration when a speed of a hybrid electric vehicle reaches an idle stop mode entering speed such that as the engine RPM is raised, a gear changing oil pressure is increased, so that a continuously variable transmission (CVT) gear ratio according to a deceleration reaches a target minimum gear ratio, and as the CVT gear ratio reaches the target minimum gear ratio, entering an idle stop mode even when a deceleration is less than a medium deceleration while a transmission control unit (TCU) does not perform a control operation for preventing an idle stop mode from being entered.
Claims5
A method for controlling an idle stop mode in a hybrid electric vehicle, comprising:
- performing an engine RPM lift-up control to raise an engine RPM if a deceleration is less than a medium deceleration when a speed of the hybrid electric vehicle reaches an idle stop mode entering speed such that as the engine RPM is raised, a gear changing oil pressure is increased so that a continuously variable transmission (CVT) gear ratio according to the deceleration reaches a target minimum gear ratio;
- and
- as the CVT gear ratio reaches the target minimum gear ratio, entering the idle stop mode even when the deceleration is less than the medium deceleration while a transmission control unit (TCU) does not perform a control operation for preventing the idle stop mode from being entered.
Dependencies are inferred from the claim text.