Abstract: In a hybrid vehicle, a hybrid type lubrication control valve which is a solenoid valve type turned on/off by electricity is used as a lubrication system component for circulating lubricating oil to a transmission and an engine clutch. A method includes measuring, by an engine clutch pressure sensor, first engine clutch engagement pressure in an off-state of the independent type lubrication control valve and second engine clutch engagement pressure in an on-state thereof; and determining, by the TCU, whether or not the independent type lubrication control valve is stuck, on the basis of a pressure difference between the first engine clutch engagement pressure and the second engine clutch engagement pressure. The method can diagnose a stuck state of the hybrid type lubrication control valve using hydraulic pressure for operating engine clutch engagement, before starting the vehicle.

Abstract: In a hybrid vehicle, a hybrid type lubrication control valve which is a solenoid valve type turned on/off by electricity is used as a lubrication system component for circulating lubricating oil to a transmission and an engine clutch. A method includes measuring, by an engine clutch pressure sensor, first engine clutch engagement pressure in an off-state of the independent type lubrication control valve and second engine clutch engagement pressure in an on-state thereof; and determining, by the TCU, whether or not the independent type lubrication control valve is stuck, on the basis of a pressure difference between the first engine clutch engagement pressure and the second engine clutch engagement pressure. The method can diagnose a stuck state of the hybrid type lubrication control valve using hydraulic pressure for operating engine clutch engagement, before starting the vehicle.

Abstract: In a hybrid vehicle, a hybrid type lubrication control valve which is a solenoid valve type turned on/off by electricity is used as a lubrication system component for circulating lubricating oil to a transmission and an engine clutch. A method for diagnosing sticking of a lubrication control valve of a hybrid vehicle includes measuring a drag torque acting on an input shaft of the transmission through an output shaft of the motor by measuring a first drag torque in an off-state of the independent type lubrication control valve and a second drag torque in an on-state thereof; and determining whether or not the independent type lubrication control valve is stuck, on the basis of a torque difference between the first drag torque and the second drag torque. The method can diagnose a stuck state of the hybrid type lubrication control valve using motor speed control, before starting the vehicle.

Abstract: A method for controlling stabilization of an exhaust gas recirculation (EGR) gas supply may include executing an intake detector condensation stuck resolving mode including, when output abnormality of an intake detector provided at an intake manifold and a variation amount of an EGR rate of an EGR system are detected by a controller while the EGR system is operated, stopping an operation of an EGR valve of the EGR system and then re-operating the EGR valve to resolve abnormality of the intake detector, which is caused by condensation of the EGR gas which is supplied to the intake manifold.

Abstract: A method for controlling stabilization of an exhaust gas recirculation (EGR) gas supply may include executing an intake detector condensation stuck resolving mode including, when output abnormality of an intake detector provided at an intake manifold and a variation amount of an EGR rate of an EGR system are detected by a controller while the EGR system is operated, stopping an operation of an EGR valve of the EGR system and then re-operating the EGR valve to resolve abnormality of the intake detector, which is caused by condensation of the EGR gas which is supplied to the intake manifold.