Disclosed is a transmission oil bypass assembly including: a body formed in a pipe shape such that a first longitudinal side of the body is inserted into a first heat exchanger for heat exchange of transmission oil, with a bypass passage provided at a second longitudinal side of the body by protruding outside the first heat exchanger, and openings formed on a side wall of the body to allow the transmission oil to be introduced therethrough; a returning pipe configured to return the transmission oil introduced through the body to the transmission; a thermal expansion unit inserted into the body; a returning-side on/off valve configured to close an internal passage of the returning pipe when a length of the thermal expansion unit is increased; and a bypass-side on/off valve configured to close the bypass passage when the length of the thermal expansion unit is decreased.

A method and apparatus for controlling transmission oil temperature are provided. The transmission oil is heated using a motor coil of an electric oil pump (EOP) as a heater before a startup of a vehicle. The method includes applying a current to the motor coil of the EOP configured to operate a transmission of the vehicle to thus heat the transmission oil by heat generated from the motor coil.

A network device that is used in a mobile communication system that supports cellular communication in which a data path passes through a core network, and D2D communication that is direct device-to-device communication in which a data path does not pass through the core network, comprises: a control unit that sets a D2D radio resource that is ensured for the D2D communication from radio resources be available to the mobile communication system. The control unit changes an amount of the D2D radio resource such that the D2D radio resource reaches an appropriate amount.

The internal combustion engines (M) of the invention are provided with a cooling water circuit, associated with a water radiator and with a lubricant oil circuit. The heat exchanger (HE) comprises an inlet and an outlet of water connected, in series, to an outlet of the water radiator, by means of a cooled water conduit and of the cooling water circuit, and to an inlet of the water radiator, by means of a return conduit and a hot water conduit; a fuel inlet nozzle and a fuel outlet nozzle, selectively connected to the fuel supply to the engine (M); and an inlet and an outlet of lubricant oil, connected to the lubricant oil circuit by means of respective oil conduits.

A surface type air to oil cooler enables oil to flow from an inlet and down a first pass of an oil passageway. A first bypass, before the end of the first pass, allows oil to flow from the first pass to a second pass of the oil passageway. A second bypass may exist toward the end of the second pass to allow the oil to flow from the second pass to an outlet before the end of the second pass.

A vehicle includes a powertrain having an engine and at least one controller. The controller is programmed to selectively heat at least one of a plurality of components of the powertrain with a given amount of waste heat based on an expected decrease in friction power associated with an expected increase in temperature from the given amount of waste heat for each of the components.

The present disclosure relates to a cooling system and method of a HEV for cooling an engine clutch and a motor in a HEV, and includes an EOP for pumping oil from an oil pan, a flow regulating valve for adjusting a coolant amount supplied to an engine clutch and a motor in the EOP, and a controller that determines whether to adjust a coolant amount based on a temperature of the engine clutch and a temperature of the motor, accelerates a motor of the EOP based on at least one of an ATF temperature, an engine clutch temperature, a motor temperature, or a TMM control mode, and controls the flow regulating valve depending on a motor speed of the EOP to adjust the coolant amount supplied to from the EOP the engine clutch and the motor.

Methods and systems are provided for an oil heater of a hybrid electric vehicle. The oil heater comprises a metal foam comprising a plurality of pores. The oil heater is activated during a regenerative braking event where an oil temperature is less than a predefined temperature.

The present invention provides a preheating, lubricating, and cooling system that oil essentially used for lubrication, wear resistance, and cooling of an internal combustion engine, industrial equipment, or a mobile vehicle is used as a preheating medium, a manager supplies the oil most optimized for load operation of equipment through a preheating system separated from the existing main oil system, and an oil supply path uses a path of the existing oil system, so that the preheating and the load operation are facilitated during an extremely cold season and an extremely hot season, and a normal operation is possible even in a case of being immediately stopped after the operation.

A lubricating system of an engine equipped with an idle reduction system includes an oil cooler, a remotely operable valve configured to open and close a bypass passage that bypasses the oil cooler, and an electronic control unit. The electronic control unit is configured to perform the steps of: controlling the valve so that a temperature of lubricating oil approaches a target temperature; and lowering the target temperature when an average torque of the engine is less than a predetermined threshold.