A spray nozzle comprising: a body comprising a duct, a seat arranged at the first end, and including an opening forming an inlet, a guide comprising a tubular jacket and a retaining member, the retaining member retaining the jacket in the duct, a plug mounted to slide axially in the channel of the jacket, the plug being pushed back against the opening by a spring, and in abutment against the bottom of the jacket, the guide comprising a radial vent, which comprises a vent channel isolated from the flow of fluid and connecting the inside of the guide jacket to a bore formed in the body of the spray nozzle.

The present invention relates to a technology of efficiently cooling a vacuum pump that produces a vacuum in a process chamber of a semiconductor manufacturing facility. The present invention provides a new type of vacuum pump cooling method that keeps the internal temperature of a vacuum pump at a predetermined level by circulating oil through rotors of the vacuum pump, such that it is possible to prevent a rapid increase in the temperature of the vacuum pump and smoothly lubricate bearings at the early stage of operation, whereby it is possible to ensure stability when performing processes and operating the pump and economically maintain the facility.

The present invention is related to a cooling device for a forklift brake system, which is capable of maintaining a predetermined level of heat-radiation performance by reducing heat when heat is generated in a service brake that is provided at a forklift driving shaft. A cooling device for a forklift brake system according to an exemplary embodiment of the present invention allows cooling oil to bypass a cooler when a pressure of the cooling oil is abnormally increased or there is a concern that a pressure of the cooling oil is increased, thereby preventing the cooler from being damaged.

An oil supply element for supplying oil into a cooling channel of a piston in an internal combustion engine, may include a channel having a lateral opening with an oil discharge element and may be configured to direct a partial oil flow via the oil discharge element and the lateral opening to at least one of an underside of a piston crown, a hub, and a piston interior.

A top surface of the piston includes a first region. A heat shielding film is formed on the first area. The top surface further includes a second region. There is no heat shielding film formed on the second region. Instead, the second area is mirror-finished. The top surface includes a central portion. A valve recess portion is formed on an intake side of the central portion. A squish portion is formed the intake side of the valve recess portion. The first area includes at least the central portion. The second area includes at least the squish portion.

A piston of an internal-combustion engine may include a piston head and a piston skirt, a cooling duct circulating in the piston head, a boss for receiving a piston pin, and a feed hopper for supplying cooling oil into the cooling duct. The feed hopper may be fastened to another component of the piston via a retaining lug by at least one of a material closure, a force closure, and a positive closure.

A piston cooling device includes a main body which includes a communication path communicating with an oil passage provided in the internal combustion engine, a nozzle pipe portion which includes an oil injection port for injecting an oil passing through the communication path, toward the piston, and a filter which is provided at an upstream side of the nozzle pipe portion in an oil flow path to filter the oil. The main body includes a cylindrical portion inserted into the oil passage. The filter has a bottomed cylindrical shape in which a filter side surface stands from a filter bottom surface, and is held inside the cylindrical portion. Filter holes are formed in the filter bottom surface and the filter side surface. The filter is disposed such that the filter bottom surface protrudes further upstream side in the oil flow path than a tip end of the cylindrical portion.

An oil distributor is provided for a lubricating and cooling system in a powertrain, comprising a housing with a first oil outlet connected to a first oil chamber and a first oil circuit and a second oil outlet connected to a second oil chamber and a second oil circuit; and a piston arranged in a cavity of the housing and movable between first and second positions and comprising: a first bore partly constituting the second oil chamber; and a second bore connecting the first bore with an outer periphery of the piston, so that when the piston is in the first position, the first oil inlet is connected to the first oil chamber and the first oil outlet, and when the piston is in the second position, the first oil inlet is connected to the second oil chamber and the second oil outlet.

A marine outboard motor is provided with an internal combustion engine comprising an engine block having an engine lubrication fluid circuit, at least one turbocharger having at least one lubricating fluid inlet and at least one lubricating fluid outlet, and a turbocharger lubrication system configured to lubricate the at least one turbocharger. The turbocharger lubrication system includes a feed path extending from the engine lubrication fluid circuit to the at least one lubricating fluid inlet, and a drain path extending from the at least one lubricating fluid outlet to the engine block. The drain path includes at least one drain tank configured to receive lubricating fluid drained from the at least one lubricating fluid outlet, and a scavenge pump configured to return lubricating fluid from the at least one drain tank back to the engine lubrication fluid circuit.

An internal combustion engine includes: a cylinder head (3); a combustion chamber recess (15) formed in the cylinder head; an intake passage (16) and an exhaust passage (17) formed in the cylinder head and communicating with the combustion chamber recess; a head oil passage (80) formed in the cylinder head, and having a first end (81A) communicating with an oil pump (62) and a second end (81B) opening out at a sliding contact surface of a valve actuating mechanism (23) provided in the cylinder head; and an oil jacket (84) formed in the cylinder head in a path of the head oil passage so as to at least partly surround the exhaust passage.