Abstract:
An oil jet (45) is provided for each cylinder at a lower part of a cylinder block (5). The oil jet (45) has a first injection nozzle (46) that injects lubricating oil toward a back side of a positon (2) during opening of a pressure control valve (51A) and a second injection nozzle (47) that injects lubricating oil toward a connection part between a lower link (7) and a control link (9) during opening of a pressure control valve (51B). By this configuration, it is possible to continuously supply the lubricating oil to the connection part between the lower link (7) and the control link (9).
Abstract:
A ferrous piston for gasoline powered engines having dimensions which achieve reduced mass and improved performance is provided. The piston crown has a thickness of less than 4 mm and includes valve pockets with an axial clearance between the valve pockets and an uppermost ring groove of less than 1.5 mm. The pin bosses have an axial thickness of less than 3.7% of a bore diameter, which is the largest outer diameter of the piston, measured between a pin bore and the crown at 1 mm from an inner face forming the pin bore. Each pin boss has a radial thickness of less than 3% of the bore diameter measured between the pin bore and a lower end of the pin boss. An undercrown surface presents a projected area of less than 45% of a total piston bore area, wherein the total piston bore area is &pgr;BD2/4, BD being the bore diameter.
Abstract:
Production of condensed water in an intercooler is suppressed. The apparatus comprises a high temperature system cooling water passage through which cooling water having a high temperature flows; a low temperature system cooling water passage which is a cooling water passage through which cooling water having a low temperature flows and which passes through at least the intercooler; two communication passages which communicate the high temperature system cooling water passage and the low temperature system cooling water passage, one of the communication passages through which the cooling water flows from the high temperature system cooling water passage toward the low temperature system cooling water passage, and the other through which the cooling water flows from the low temperature system cooling water passage toward the high temperature system cooling water passage; valves which are provided for the communication passages respectively; and a control unit which controls the valves provided for the communication passages respectively so that a temperature of the gas flowing out from the intercooler is higher than a dew point temperature.
Abstract:
An engine block (104, 105) is disclosed. The engine block (104, 105) includes a cylinder (106, 107) and a piston (108) slidably received within the cylinder (106, 107). The engine block (104, 105) also includes a liner (128, 129) between the cylinder (106, 107) and the piston (108). The engine block (104, 105) further includes a groove (134, 135) provided about and in communication with the liner (128, 129) and the cylinder (106, 107). The engine block (104, 105) includes at least two oil nozzles (124, 126) arranged spaced apart from each other. The oil nozzles (124, 126) are configured to spray oil on the piston (108). The engine block (104, 105) also includes an oil channel (118). The oil channel (118) is configured to supply oil to at least one of the at least two oil nozzles (124, 126) via the groove (134, 135).
Abstract:
The invention relates to a system for cooling the pistons of an internal combustion engine, comprising an oil pump driven by the engine, nozzles for spraying oil on the pistons, and a control device (2) provided between the oil pump and the nozzles, the control device including a valve (14) arranged between an oil inlet duct (8) connected to the pressurised oil pump and a nozzle supply duct (10), said valve (14) enabling the oil flow from the pump to the nozzles when the oil pressure is at least equal to a threshold pressure, wherein said device further comprises an electrovalve (22) capable of closing the valve (14) while enabling the pressurised oil to contact the plug (16) in the closing direction of the valve (14).
Abstract:
Die Erfindung betrifft einen Verbrennungsmotor mit einer Ölversorgungseinrichtung (9) zum Schmieren eines Zylinders (2) und/oder zum Kühlen eines Kolbens (3), wobei die Ölversorgungseinrichtung (9) so ausgebildet ist, dass eine Schmierung des Zylinders (2) ständig erfolgt, während die Kühlung des Kolbens (3) zuschaltbar ist, und/oder dass die Schmierung des Zylinders bereits bei einem geringeren Öldruck erfolgt, bei welchem noch keine Kühlung des Kolbens stattfindet.
Abstract:
This nozzle is (15) adapted to direct a jet (J15) of oil under pressure on internal combustion engine. It has a variable outlet section, and it is provided with mechanical means (154, 155) adapted to control its outlet section on the basis of the pressure (P8) of a fluid under pressure provided to these mechanical means, independently of the oil going through (F6) the outlet (152) of the nozzle. In the lubrication system an auxiliary line is provided with first proportional means controlling oil flow (F6) toward a nozzle (15). A control line connects a main line or the auxiliary line, upstream of the first proportional means, to mechanical means (154, 155) adapted to control the outlet section of the nozzle (15). The control line is provided with second proportional means controlling the pressure (P8) of oil delivered (F8) to said mechanical means (154, 155). The nozzle can be used as a piston cooling nozzle to direct oil toward a piston of an internal combustion engine.