Ring oiler

Abstract: PROBLEM TO BE SOLVED: To improve a gas sealing function by a piston ring in an exhaust emission control device for an internal combustion engine SOLUTION: Ring grooves 44, 45 and 46 are formed to the peripheral surface of a piston body 41, a top ring 51, a second ring 52 and an oil ring 53 are fitted to these ring grooves 44, 45 and 46, and purifying catalysts 54, 55 purifying a harmful component contained in exhaust gas (blowby gas) is supported by coating on the wall surface of a space part S1 partitioned by the bottom surface 44a of the ring groove 44 positioned in the upper part and the inner peripheral surface 51a of the top ring 51 COPYRIGHT: (C)2008,JPO&INPIT

Abstract: A gas turbine engine (10) having an oil cavity architecture and bearing placement which reduce heat rejection and oil system complexity by enclosing the reduction gearbox bearings (54) and at least the shaft bearings (42, 44) supporting the high pressure shaft (38) in the same oil cavity (60).

Abstract: An integrated emergency lubrication system is provided to lubricate the bearings of a gas turbine engine in the event that the normal lubrication system for the engine fails for any reason. The emergency system includes an accumulator for storing oil, derived from the normal lubrication system, that is released in a controlled manner to lubricate the engine's bearings for several minutes after the normal lubrication system fails. During that time, the operator of the engine has an opportunity to cope with the situation. Energy for operating the emergency lubrication system is derived from compressed air bled form the compressor section of the engine, the compressed air also being combined with oil from the accumulator to form an air/oil mist that is sprayed over the bearings to be lubricated. A plurality of valves provided to control the flow of the oil and the air and to regulate the pressure of the air, all valves and associated elements being integrated in an assembly that is relatively inexpensive to manufacture, highly reliable, and easily maintained. The configuration also minimizes vulnerability to extraneous forces and has the further benefit of not being attitude sensitive, rendering it particularly useful in aircraft employing gas turbine engines.

Abstract: A hydraulic control device is equipped with an oil jet that injects oil to a piston, an oil gallery through which oil injected by the oil jet and oil supplied to a lubrication part of an engine pass, an oil pump that pumps oil to the oil gallery, and a switching valve that is provided on an oil jet passage connecting the oil gallery and the oil jet together and leads oil supplied from the oil gallery to either the oil jet or an oil pan disposed at an upstream side of the oil pump. An ECU controls the switching valve on the basis of an engine speed and an engine cooling water temperature.