Abstract:
A fluid motor has working chambers which take in and expell a fluid. The fluid under pressure acts in working chambers to produce a torque and thereby to drive the motor, constituting with the associated parts the drive of the motor.At least one separated fluid line supplies fluid into a space which includes or operates an additional member provided on the fluid motor. The mentioned fluid line and space are able to operate independently of the drive system of the motor.It is thereby possible to operate over the fluid line, for example by remote control, the additional member on the motor independently of the fluid flow of the drive of the motor. The additional member is thereby able to do an additional work or function independently of the drive of the motor.In other embodiments of the invention, the additional member may work in unison or dependence on the fluid drive of the motor, when so desired. Instead of applying only a single separated fluid line a number of separated fluid lines can also be applied and may provide different actions of one or more additional members on the fluid motor.
Abstract:
In a liquid-cooled, composite piston for internal-combustion engines, particularly for medium-speed diesel engines, comprising a lower part, which made of a material comprising an eutectic aluminum-silicon alloy which lower part is connected to an upper part comprised of a ferrous material, said upper part formed on its underside with a concentric top rib, which rib forces the opposite bearing surface of the lower part and is so arranged that the rib constitutes the radially inner boundary of an annular cooling channel, which is disposed in the upper part behind the top land of the piston and behind at least part of the ring-carrying portion of the piston said rib also defining a central cooling chamber, which is disposed in the upper part and which communicates with the cooling channel by radial coolant bores, the improvement comprising a ring comprised of a ferrous material concentrically disposed and gripped between the bearing surface of the bearing rib and the opposite bearing surface of the lower part of the piston in an arrangement in which the confronting bearing surfaces of the bearing rib and the gripped ring are in peripheral rolling contact with one another.
Abstract:
To provide for separate expansion control actions at the top and bottom edges of the skirt of an expansion-controlled light alloy piston, to prevent a direct propagation of deformation between the top and bottom edges of the skirt and to reduce the skirt area between the top and bottom edges of the skirt, the skirt of the piston is provided at its periphery with a transverse slot, which extends around the entire periphery of the skirt or part thereof and is disposed on the level of the piston pin boss.
Abstract:
The present invention provides a hot spark that is more-or-less uniform over the combustion chamber volume in a liquid oxidant/liquid fuel combustion engine. In addition, heat losses are reduced and low wear/low friction surfaces are provided. Flame sprayed ceramic coatings are utilized to provide all embodiments of the present invention.
Abstract:
In a cast light-alloy piston having a skirt which is recessed adjacent to the piston pin bosses, the two sides of the skirt are unsymmetrical with respect to the piston pin bosses.For an improved adaptation to the different conditions of operation of the engine, the skirt is connected to the piston pin bosses on one side by supporting ribs which extend at an angle of 30 to 60 degrees to the piston pin axis, and on the other side by supporting ribs extending at an angle of 90.degree. to the piston pin axis.
Abstract:
An oil cooled diesel engine piston is designed to restrict heat loss from the combustion chamber through provision of a combustion chamber insert defining a central non-oil-cooled chamber and a surrounding annular insulating air gap. The air gap controls heat flow primarily between the combustion gas exposed wall of the insert and an adjacent coolant exposed wall of the main piston volume.The insert is press fitted into a recess in the main piston body and is positively locked therein by a retaining ring. A seal ring closes expansion clearance provided at the upper edge of the insert against significant gas flow into the insulating air gap. Insulating efficiency of the air gap is maximized by forming the gap with a thickness throughout a major portion of its extent of between about 0.040 and 0.060 inches.Numerous additional features are also disclosed.
Abstract:
Fuel porting and passage arrangements including transfer porting and passages between the crankcase and the combustion side of the piston, together with intake porting and passage arrangements for delivering fuel to the crankcase. The transfer and intake passages include portions of regions common to both or in communication with each other in relationships providing not only for direct delivery of fuel to the crankcase but also for augmenting fuel transfer into the combustion space.
Abstract:
A piston incorporating a thermal barrier is produced by first making an annular piston ring carrier insert from steel. The insert comprises an annular body to the upper and lower radially-inner edges of which are secured the upper and lower edges of an annular element which is channel shaped in radial cross-section and the channel in which faces radially outward. The element is soldered or welded to the insert body so that an enclosed annular space is defined between the element and body. The insert thus formed is then heated in molten aluminium to "alfinize" its external surface. The treated insert is subsequently placed in a piston mold and the piston is molded about it from aluminium.
Abstract:
A coating is disclosed herein together with a method of forming that coating on metal surfaces of an internal combustion chamber. The coating is deposited for example, on the combustion surface of a piston to form a thermal barrier and thus enable higher temperatures to be sustained within the chamber. Combustion at higher temperatures achieves a more complete fuel burning thus increasing performance and reducing emissions. The coating is formed on the combustion surface by successively depositing layers of different materials preferably applied utilizing a plasma flame spray process. More particularly, the formation of the coating on the combustion surface involves preparing the surface as by grit blasting and then initially depositing a thin (approximately 0.001 - 0.003 inches) nickel aluminum alloy layer. Thereafter, a second thicker layer (approximately 0.003 - 0.006 inches) comprised primarily of said nickel aluminum alloy and refractory zirconium oxide is deposited followed by the deposition of a still thicker layer (approximately 0.008 - 0.010 inches) primarily of zirconium oxide.
Abstract:
A deposit of a reinforcing material is formed on an aluminium alloy piston by spraying one or more regions of the piston with a copper-based material from an electric-arc spray gun which produces molten particles of a heat content sufficient to produce an effective metallurgical interaction with the piston alloy so that the copper-based material is bonded to the region or regions of the piston.