A second temperature adjustment medium branches and flows into the first branch flow path and the second branch flow path at the branching portion, the second temperature adjustment medium and the second temperature adjustment medium are merged at the merging portion and flow through the pressure feed flow path to be supplied to the first pump, and the second temperature adjustment medium circulates through the second temperature adjustment circuit. A valve device configured to adjust a flow rate of the second temperature adjustment medium flowing through the second branch flow path is provided in the second branch flow path between the branching portion and the heat exchanger. The control device is configured to control the valve device to block the second temperature adjustment medium from flowing through the second branch flow path when a failure of the heat exchanger is detected.

A method for thermal management of a motor vehicle engine includes one or more of the following: determining a current lube oil temperature; determining a lube oil temperature for optimal friction; turning on piston cooling jets based on the current lube oil temperature and the lube oil temperature for optimal friction; and turning off the piston cooling jets.

A piston cooling apparatus of an engine and a method for controlling the same are provided. The piston cooling apparatus includes a piston cooling jet that has a first nozzle configured to spray oil towards an inner wall of a cylinder configured such that a piston reciprocates thereon, and a second nozzle configured to spray the oil towards the lower part of the piston. A jet control valve is installed to adjust a hydraulic pressure that is supplied from an oil pump to the piston cooling jet. A controller is configured to operate the jet control valve and adjust the hydraulic pressure discharged from the oil pump.

A vehicle includes: an electric motor; and a temperature-control circuit through which a non-conductive temperature-control medium for temperature control for the electric motor circulates. The temperature-control circuit includes: a heat exchanger configured to exchange heat between the non-conductive temperature-control medium and a conductive temperature-control medium; and a pump driven in accordance with driving of the vehicle to circulate the non-conductive temperature-control medium. The temperature-control circuit further includes a liquid pressure holding unit configured to hold liquid pressure of the non-conductive temperature-control medium in the heat exchanger equal to or higher than a predetermined pressure.

The present invention relates to a cooling jet nozzle (10) for an engine piston. The nozzle (10) comprises a cooling stream pathway (14), in which the internal cross-sectional dimensions of the pathway vary along the length of the pathway; and a plunger (28) located within the cooling stream pathway to impinge a cooling feedstream received within the pathway to provide a cooling jet. The plunger (28) is axially moveable within the pathway to adjust the internal cross-sectional dimensions of the cooling jet.

A vehicle drive-force transmitting apparatus including: a casing; a drive-force transmitting mechanism disposed in the casing; and first and second oil pumps configured to suck, through respective inlet ports thereof, oil stored in a bottom portion of a casing, such that the drive-force transmitting mechanism is lubricated by the oil pumped up by the first and second oil pumps. The casing is provided with a drain hole through which the oil stored in the bottom portion of the casing is to be discharged to an exterior of the casing. A position of opening of the inlet port of the first oil pump is lower than a position of a lower end of the drain hole, and a position of opening of the inlet port of the second oil pump is higher than the position of the lower end of the drain hole.

A system and a method for cooling a prime mover and lube oil, comprising: a prime mover configured to drive a pump with a motor shaft; a prime mover cooling assembly that encases the prime mover, wherein the prime mover cooling assembly comprises: an air intake and an exhaust ventilator mounted above the prime mover; and a lube oil cooling assembly mounted above the prime mover, wherein the lube oil cooling assembly cools lube oil circulating within the pump and is mounted above the prime mover such that the lube oil cooling assembly does not hang off one or more sides of the prime mover and prime mover cooling assembly.

The present invention is proposed to simplify a structural complexity of a conventional oil cooling method for a car motor, reduce a material cost, and also achieve improved cooling performance, in which a cooling liquid, which is provided through a cooling pipe in a conventional case, is sprayed onto a heating portion in a motor through a reservoir tank and a nozzle which are attached to a motor housing through a direct cooling method. A reservoir space is integrally formed with the motor housing or is formed to be separate from the motor housing, a pressure of the cooling liquid is uniformly maintained and damped, and the cooling liquid introduced into the reservoir tank through a flow path formed without a cooling pipe is directly sprayed onto the heating portion to cool the heating portion such as a stator core or a coil.

A method of cooling an aircraft power plant having a combustion engine is disclosed. The method comprises in a first operating mode, inducing a cooling air flow through a heat exchanger in an air conduit via a flow inducing device fluidly connected to the air conduit, the heat exchanger connected in heat exchange relationship with the power plant of the aircraft. The method comprises, in a second operating mode, bypassing the cooling air flow from the flow inducing device via a selectively closable air outlet of the air conduit downstream of the heat exchanger. A cooling system for an aircraft power plant is also disclosed.

A combustion-chamber structure of an engine comprises a combustion chamber which is partitioned by a cylinder block, a cylinder head, a piston, an intake valve, and an exhaust valve. The intake valve (exhaust valve) comprises an intake valve body including an umbrella part having a valve head and a valve face, a heat-insulation layer provided at the valve head and having smaller heat conductivity than the valve body, a heat-barrier layer provided to cover the valve head with the heat-insulation layer and having smaller heat conductivity than the valve body and the heat-insulation layer, and a heat-diffusion layer provided between the heat-insulation layer and the heat-barrier layer and having larger heat conductivity than the heat-insulation layer and the heat-barrier layer. The heat-diffusion layer comprises a contact portion which contacts with the cylinder head when the intake valve is closed.