A drain plug for a component of a vehicle includes: a plug body having a stem portion configured to plug a corresponding hole in the component of the vehicle, and a sensor module. The sensor module includes a sensor and a wireless transmitter configured to transmit data regarding a reading from the at least one sensor. The sensor includes at least one of a temperature sensor, a pressure sensor, and an accelerometer. A system for wireless monitoring a component of a vehicle includes: a plug body having a stem portion configured to plug a corresponding hole in the component of the vehicle, and a sensor module having at least one sensor and a wireless transmitter configured to transmit data regarding a reading from the at least one sensor. The system also includes a receiver located on the vehicle and configured to receive the data from the wireless transmitter.

A method for warning of insufficient engine oil for a vehicle includes: 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 an integrated value obtained by integrating a difference 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 the 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 learned neural network learned in weights using an engine load, an engine speed, and an intake pressure inside the engine intake passage downstream of the throttle valve (19) as input parameters of the neural network and using leakage of blow-by gas from a blow-by gas feed path (20) as a truth label is stored. At the time of operation of the vehicle, the learned neural network is used to detect the abnormality of leakage of blow-by gas from the blow-by gas feed path (20) from the above input parameters.

A method for warning of insufficient engine oil for a vehicle includes: 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 an integrated value obtained by integrating a difference 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 the 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 learned neural network learned in weights using an engine load, an engine speed, and an intake pressure inside the engine intake passage downstream of the throttle valve (19) as input parameters of the neural network and using leakage of blow-by gas from a blow-by gas feed path (20) as a truth label is stored. At the time of operation of the vehicle, the learned neural network is used to detect the abnormality of leakage of blow-by gas from the blow-by gas feed path (20) from the above input parameters.

Methods and systems are provided for improving engine oil level sensing while a vehicle is moving. The output of a hot wire sensor partially immersed in an engine oil well is sampled during selected vehicle moving conditions when lateral and longitudinal acceleration is limited and the vehicle is driving in a straight line. A transfer function is used to correlate a rate of change in sensor output, sampled during the selected vehicle operating conditions, with engine oil level.

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.

A method for determining a degree of loading on a filter medium of a filter device on a vehicle through which a fluid flows includes determining an operating characteristic of the filter device based on at least one operating quantity of the vehicle and comparing a predefined reference characteristic of the filter device with the operating characteristic. The degree of loading is derived from a result of the comparing step.

A drain plug for a component of a vehicle includes: a plug body having a stem portion configured to plug a corresponding hole in the component of the vehicle, and a sensor module. The sensor module includes a sensor and a wireless transmitter configured to transmit data regarding a reading from the at least one sensor. The sensor includes at least one of a temperature sensor, a pressure sensor, and an accelerometer. A system for wireless monitoring a component of a vehicle includes: a plug body having a stem portion configured to plug a corresponding hole in the component of the vehicle, and a sensor module having at least one sensor and a wireless transmitter configured to transmit data regarding a reading from the at least one sensor. The system also includes a receiver located on the vehicle and configured to receive the data from the wireless transmitter.

An apparatus and method for controlling an electric oil pump with a pump control signal generated by an electronic control unit (ECU) of a vehicle. The pump control signal has a variable drive time portion during which the electric oil pump is actuated to supply oil to an engine of the vehicle and a variable cycle time defining a frequency of the pump control signal.