Abstract:
Die Erfindung betrifft eine Fördereinrichtung (100; 100a) für kryogene Kraftstoffe (1), mit einer mit einem Antrieb (35) verbundenen Förderpumpe (10; 10a), wobei der Antrieb (35) mit einem linear oder rotativ beweglichen Antriebselement (22; 22a) der Förderpumpe (10; 10a) zum zumindest mittelbaren Antreiben der Förderpumpe (10; 10a) verbunden ist, und wobei die Förderpumpe (10; 10a) dazu ausgebildet ist, den Druck des Kraftstoffs (1) auf einen Systemdruck zu erhöhen.
Abstract:
In a tappet-driven single piston pump, piston side loads caused by return spring out-of- squareness are eliminated by effectively piloting the piston return spring, preferably the associated spring seat, by the tappet, thereby allowing the tappet to bear the spring side load. The piston engages and is returned by the spring seat, but radial clearance between the piston and spring seat is greater than radial clearance between the spring seat and tappet, thus eliminating side loading imparted to the piston. The spring seat can be considered a piston retainer, in which the piston is not closely attached to the retainer but instead exhibits a predefined radial clearance greater than the piloting clearance between the retainer and the tappet.
Abstract:
A method for compressing gaseous fuel is disclosed, which comprises the steps: a) ingesting gaseous fuel into a chamber; b) ingesting air into the chamber and mixing the gaseous fuel with the air; c) igniting and partially combusting the resulting mixture of gaseous fuel and air in a confined space such that a predominant fraction of the gaseous fuel is not combusted, causing an increased temperature and therefore an increased pressure of the fraction of the gaseous fuel which is not combusted; and d) discharging the resulting compressed gaseous fuel. Moreover, a compressor (1) is provided, comprising a casing (2), a rotor (3) with at least three vanes (6), at least one inlet (7) for gaseous fuel, at least one outlet (11) for gaseous fuel, at least one air inlet (9) and at least one igniter (14). The rotor (3) is placed in the casing (2) such that at least three variable-volume chambers (15, 16, 17) part-bounded by the vanes (6) are formed during a rotor revolution, the inlet (7) for gaseous fuel is placed in the casing (2) such that the inlet (7) for gaseous fuel is connected to a first location where a chamber (15) has an increasing volume during a revolution of the rotor (3), the air inlet (9) and the igniter (14) are placed in the casing (2) in a second location where a chamber (16) has an increasing, decreasing or constant volume during a revolution of the rotor (3), and the outlet (11) for gaseous fuel is placed in the casing in a third location where a chamber (17) has a decreasing volume during a revolution of the rotor (3). Furthermore, a gas turbine comprising an inventive compressor (1) is disclosed.
Abstract:
The invention concerns a pump for pumping a first liquid, called transferred liquid, and comprising a main unit (18) for pumping the transferred liquid actuated by an auxiliary unit (20) pumping a second liquid, called working liquid. The auxiliary unit (20) comprises a hub (64) mounted rotatable in a housing (16). Said hub (64) comprises a cylindrical guiding surface (SG) rotatable in the housing (16) extended by a shoulder (FE) axially positioning the hub in the housing (16). The guiding surface (SG) and the shoulder (FE) co-operate respectively with matching rotation guiding and axial positioning means (SP, FP) borne by the housing (16). The hub (64) is integral with a skew plate (62) actuating at least a piston (54) elastically returned towards said skew plate. The shoulder (FE) is urged to press against the matching means (FP) for axial positioning by the return force of the piston and the pressure of the working liquid in contact with the skew plate (62). The invention is applicable to a high pressure pump for supplying a motor vehicle engine with fuel.
Abstract:
A fuel pump assembly includes a fuel pump. The fuel pump includes a camshaft having a cam lobe. The camshaft is configured to rotate. The fuel pump includes a first cam roller and a second cam roller disposed about an outer surface of the cam lobe, a first pumping assembly configured to interact with the first cam roller, and a second pumping assembly configured to interact with the second cam roller. The second pumping assembly is offset from the first pumping assembly. The fuel pump further includes a housing configured to support the camshaft, the first cam roller, the second cam roller, the first pumping assembly, and the second pumping assembly.
Abstract:
A fuel pump for an internal combustion engine is provided comprising a barrel including a central bore having a longitudinal axis, a plunger disposed partially in the central bore and movable along the longitudinal axis, a spring retainer, a first coil spring having a proximal end in contact with a first section of the barrel and a distal end in contact with the spring retainer to urge the spring retainer into engagement with a tappet assembly, an extender element coupled to the plunger, and a second coil spring having a proximal end in contact with a second section of the barrel and a distal end in contact with the extender element to urge the plunger toward the spring retainer, wherein the extender element includes a counter-bore to couple the extender element to the plunger.
Abstract:
A fuel pump is disclosed wherein a substantially cylindrical plunger bore is provided with an annular drain groove fluidically coupled to a drain duct. A pump plunger is driven by a drive system located in a separate mechanical compartment that holds a reservoir of lubricating oil. An annular seal is provided adjacent the drain groove substantially at the end of the bore and retained in position by a seal support. Exemplary embodiments provide the drain groove and seal as being positioned immediately adjacent one another so that the seal forms a lower wall of the drain groove.