Method and device for warning of insufficient engine oil for a vehicle

A device for warning of insufficient engine oil for a vehicle, the device comprising:

• a hydraulic continuously variable valve timing (CVVT) device included in an engine of the vehicle;
• and
• a controller determining whether conditions for determining that the vehicle has insufficient engine oil are satisfied, after the engine is started,
• wherein, when the conditions for determining that the vehicle has insufficient engine oil are satisfied, the controller determines whether an integrated value, obtained by integrating a difference between a target operating value and an actual operating value of the hydraulic CVVT device within an operating time period of the hydraulic CVVT device, is equal to or greater than a reference difference value, and
• the controller determines that the vehicle has insufficient engine oil based on counting information on a number of times the integrated value, obtained by integrating the difference between the target operating value and the actual operating value, is equal to or greater than the reference difference value.

A method for warning of insufficient engine oil for a vehicle, the method comprising:

• determining, by a controller, whether conditions for determining that the vehicle has insufficient engine oil are satisfied, after an engine of the vehicle is started;
• determining, by the controller, whether a difference value between a target operating value and an actual operating value of a hydraulic continuously variable valve timing (CVVT) device included in the engine within an operating time period of the hydraulic CVVT device is equal to or greater than a reference difference value, when the conditions for determining whether the vehicle has insufficient engine oil are satisfied;
• and
• determining, by the controller, that the vehicle has insufficient engine oil based on counting information on a number of times the difference value between the target operating value and the actual operating value is equal to or greater than the reference difference value.