An engine unit including a heater provided in a blow-by gas returning path for returning a blow-by gas that leaks out from a combustion chamber of an engine to an intake path. The heater is electrically connected to a controller of the engine through wiring harnesses. The controller is configured to, while controlling energization of the heater, perform an abnormality detection on the wiring harness based on a magnitude of current flowing to the wiring harness during energization of the heater, and perform an abnormality detection on the heater and the wiring harnesses based on a magnitude of voltage applied to the wiring harness located downstream from the heater during non-energization of the heater.

A refiner device for refining of a liquid, wherein the refiner device includes a housing provided with a liquid inlet for unrefined oil or fuel, a liquid outlet for refined oil or fuel, an air inlet for supplying a flow of air into the housing, and an air outlet for discharging air and contaminants removed from the liquid. The refiner device further includes a liquid receiving plate arranged inside the housing, the refiner device arranged such that when liquid has passed through the liquid inlet during operation of the device, the liquid is contacted with an upper surface of the liquid receiving plate before it reaches the liquid outlet, and at least one heating element arranged to directly or indirectly heat the liquid while the liquid is in contact with the liquid receiving plate. The refiner device further includes a hollow air-guiding member arranged at the liquid receiving plate.

Methods and systems are provided for warming an engine and/or engine fluids. In one example, a method may comprise powering on an electric motor of an intake boost device to generate heat, circulating coolant and/or engine oil through the boost device to absorb the heat produced by the boost device, and then flowing the coolant and/or engine oil to the engine to transfer the heat absorbed from the boost device to the engine. In this way, an engine may be warmed without running the engine rich by using the heat generated by the electric motor of the boost device to warm the engine.

The present invention relates to a vehicle oil warmer and a heat exchange system. More particularly, the present invention relates to a vehicle oil warmer and a heat exchange system, which enable a heat exchange between a coolant and oil to be automatically controlled according to the temperature of the coolant discharged from an engine, without a separate bypass valve for controlling the flow rate of the coolant, to thereby secure a heating performance of the vehicle interior while simultaneously heating the oil at the time of an initial start of the engine, and when the vehicle is running, lower the temperature of the oil by using an oil cooler in which low-temperature coolant flows, so that the temperature of the oil can be adjusted appropriately.

To provide a construction machine including a novel preheating unit that can efficiently preheat entire circulation channel where fluid flows, and a preheating method of the construction machine. A bypass channel is arranged in a circulation channel through which the fluid is circulated, this bypass channel is provided with the preheating unit that is formed of a heater and a bypass pump. According to such configuration, even in a state circulation of the fluid may stop in the circulation channel, the fluid can be heated while the fluid is circulated through the bypass channel, and therefore the entire circulation channel can be efficiently preheated. Moreover, since retrofitting to the existing circulation channel is possible, sound versatility can be exerted.

Method for controlling the supply of oil to an internal combustion engine, comprising a procedure for detecting a potentially dangerous condition for the correct operation of an internal combustion engine (1). Said condition is the clogging of an oil filter (3) upstream of the engine (1) or the excessive presence of fuel in the lubricant oil. The detection procedure comprises the steps of: changing the flow rate of oil that transits through the filter (3) and that is processed by a pump (2) for lubricating the engine (1); detecting the time that passes between changing the oil flow rate and a detection of a pre-established variation in a parameter connected at least with the pressure downstream of said filter (3), said variation being determined by said change of the flow rate, said filter (3) being placed upstream of the engine (1); comparing said time with pre-established values.

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.

Systems and apparatuses include a generator set including an alternator, a transmission coupled to the alternator and structured to receive power from an engine, and an oil heating system including an oil pan structured to provide lubricating oil to the engine and including an oil outlet and an oil inlet, a plurality of immersion heaters positioned at least partially within the oil pan, a return line positioned within the oil pan, coupled to the oil inlet, and including a plurality of apertures for providing oil into the oil pan, each aperture aligned with a corresponding one of the plurality of immersion heaters, and a pump receiving oil from the oil outlet, and providing oil to the oil inlet.

A turbocharger includes a housing and a rotor with a shaft that is housed within the housing. The turbocharger also includes a bearing structure that supports rotation of the shaft within the housing and a locating fastener that retains the bearing structure in a position relative to the housing. Furthermore, the turbocharger includes a heating system coupled to the locating fastener and that is configured for selectively heating the locating fastener.

A valve group (10) is housed in a duct (40) of a pressurized oil circuit of a vehicle. The valve group (1) extends along an axis (X-X) including a valve body (11) axially fixed to the conduit (40) and an obturator (15) fitted axially movably, on the valve body (11). The obturator (15) has an exchanger aperture (153) through which oil flows to a heat exchanger (3) in the circuit and an auxiliary aperture (152) through which the oil flows to an auxiliary component of the circuit. The valve group (10) includes a pair of elastically yieldable elements (180) of a material selected from among the shape-memory alloys, operatively connected between the valve body (11) and obturator (15), and suitable, as a function of the oil temperature and/or the oil pressure, to axially move and to maintain the obturator (15) in a predefined axial position.