Aginfor Ag Fur Industrielle Forschung

Asea Brown Boveri Inc.

Bbc Brown Boveri Ag

Sig Schweizerische Industrie-gesellschaft

Crt Common Rail Technologies, Ag

Sig Schweizerische Industrie-gesellschaft Industrieplatz

Roland Kolb

Fritz W Spinnler

Gregor Jetzer

Marco A Ganser

Markus Tappolet

Andreas Carelli

Jurg Weber

Severin Kern

The control space of the fuel injection valve is delimited, on the one hand, by the piston of the injection-valve member, on the other hand by the slide-valve body and circumferentially by the sleeve. Both the double-acting piston and the slide-valve body are guided in a narrow sliding fit on the sleeve. The throttle passage runs through the slide-valve body and is flow-connected permanently to the control passage in the control body. The throttle inlet leads from the high-pressure space into the control passage. The latter, on the side facing away from the slide-valve body, can, via a pilot valve, be connected to a low-pressure space and be separated again from the latter. The connection of the control passage to the low-pressure space leads to a pressure drop in the control space, with the result being that the injection-valve member moves in the direction of the slide-valve body and releases the injection nozzles. After the control passage has been separated from the low-pressure space, as a result of the pressure difference in the control space and on that side of the slide-valve body which faces away from the latter, the slide-valve body, together with the injection valve, is moved in a direction away from the control body, thus leading to a rapid closing of the injection nozzles. Under the force of the spring element, the slide valve body then again sealingly engages the control body.

Fuel-injection valve for internal combustion engine

A housing (7') of the displacement machine for compressible media includes an end wall (28). Placed onto the housing (7') in the axial direction is a hood (50), which, together with the end wall (28), bounds a space (51). The two inlets (12, 12'), which are located on the outside in the radial direction, are connected to each other by this space. For its part, the hood (50) has a nozzle-like connection (52), via which the displacement machine can be connected to an upstream air filter. The displacement machine needs little space, as viewed in the radial direction.

Displacement machine for compressible media

A displacement machine for compressible media includes a displacer (1) which is arranged in a stationary housing. When the machine is operating, the displacer executes a circulating but non-rotating movement. Spiral bars (3, 3') are arranged perpendicularly on the disk (2). The bars (3, 3') have outer sealing faces (30, 30') and inner sealing faces (31, 31'). The beginning (32) of the outer sealing faces (30, 30') is offset with respect to the beginning (33) of the inner scaling faces (31, 31'), as viewed in the circumferential direction. This is correspondingly true of the end (34, 35) of the sealing faces. The bars (3, 3') engage in spiral delivery spaces in the housing and, when the machine is operating, the sealing faces (30, 30', 31, 31'), together with the cylindrical walls of the delivery spaces, form working chambers in a uniform rotational angle interval of the drive.

A positive-displacement machine for compressible media has a positive displacement body that is retained on a disk-like rotor, which is eccentrically drivable relative to the housing, in such a manner that each of its points executes a circular motion during operation. To that end, an eccentric disk is disposed on a drive shaft, and the rotor is supported on this disk by means of an oil-lubricated bearing. The lubricating oil is delivered and removed to and from the side remote from the drive side of the drive shaft, and the separation of the oil inflow from the oil return flow is effected in the housing by a slide bearing which has one oil chamber each on both ends. The separation of the oil streams is effected by an indentation that does not extend over the entire length of the slide bearing. Through this indentation, the slide bearing is likewise supplied with oil. The indentation connects the oil inflow bore in the housing with the oil chamber.

Positive-displacement machine operating by the spiral principle

In a positive-displacement device for compressible media with a helically-shaped conveying chamber disposed in a stationary housing, a helically-shaped positive-displacement body is associated with the conveying chamber. The body is maintained on a disk-shaped rotor which can be eccentrically driven in relation to the housing in such a way that during operation, each one of its points performs a circular movement which is limited by the circumferential walls of the conveying chamber. The front faces of the positive-displacement body adjoining one lateral wall of the conveying chamber are provided with a groove into which a sealing strip, consisting of a resilient material which is capable of gliding, is inserted. The groove has at least partially a meander-like extent.

Helical positive-displacement machine having a meandering sealing strip

A displacement machine for compressible mediums exhibits several spiral-shaped conveying spaces, which are disposed in a stationary housing and which span a circumferential angle of approximately 360.degree.. The spiral-shaped displacement bodies, which are assigned to the conveying spaces and which span a circumferential angle of approximately 360.degree., are held in such a manner on a disk-shaped rotor, driven off-centered with respect to the housing, that during service each of their points effects a circular movement defined by the circumferential walls of the conveying spaces. The predominant reach of both the spirals of the conveying spaces and the displacement bodies extends with a first curvature and their exit-sided end exhibits over an angular range (.alpha.) of 45.degree. a second curvature that is clearly smaller.

Displacement machine spiral shaped strip with different curvatures

A displacement machine for compressible mediums exhibits several spiral-shaped convoying spaces (11a, 11b), which are disposed in a stationary housing (7a, 7b). A displacement body (1-4) is assigned to the conveying spaces and is held in such a manner on a disk-shaped rotor (1) that can be driven eccentrically relative to the housing that during service each of its points effects a circular movement defined by the circumferential walls of the conveying spaces. To this end an eccentric disk (23), on which the rotor (1) is mounted by means of an oil-lubricated mounting, is disposed on the drive shaft (24). A sliding bearing (22) is provided on the rotating eccentric disk (23) for the orbiting rotor (1). The oil is fed in and drawn off by way of a borehole (31) in the eccentric disk. Passages are disposed within the eccentric disk to feed oil without air into the sliding bearing gap.

Displacement machine according to the spiral principle

On an eccentric shaft having at least one counterweight (20) which is mounted to the shaft as separate part, the seat of the counterweight on the shaft exhibits a cross-section bounded by two circular arcs. One circular arc (43) which is diametrically opposite to the eccentric (23) has its center on the eccentric axis (41) and the other circular arc (44) has its center on the axis of rotation (42) of the shaft (24). Use of the drive shaft in a displacement machine of the spiral type of construction, in which a displacement body is held on a disk-shaped rotor which can be eccentrically driven with respect to a housing.

Eccentric shaft with counterweight

A displacement machine for compressing fluids includes a housing, a rotor in the housing and a drive shaft journalled in the housing and eccentrically mounting the rotor. A guide shaft journalled in the housing by a slide bearing guides the oscillation of the rotor. Intermeshing spiral strips on the rotor and housing produce compression of fluid in working chambers during oscillation of the rotor. In order to lubricate the drive and guide shafts, a lubricating system includes a bore supplying lubricant to the slide bearing, lubricant passages in the drive shaft and an intermediate line connecting the lubricant outlets from the slide bearing to the lubricant passages in the drive shaft. The guide shaft may be hollow to provide a bore therein which also communicates with the lubricant outlets from the slide bearing and supplies lubricant to an eccentric of the guide shaft.

Spiral displacement machine having a lubricant system

In a displacement machine for compressible media, having a delivery space (6) which is delimited by spiral-shaped peripheral walls (8, 9) extending perpendicularly from a side wall and leads from an inlet (2) outside the spiral to an outlet (3) inside the spiral, and having a spiral-shaped displacement body (5) which projects into the delivery space (6) and is mounted with respect to the delivery space so as to execute a rotary, twist-free movement, the center (10) of said displacement body is offset eccentrically relative to the center (11) of the peripheral walls (8, 9) in such a way that the displacement body (5) at all times almost touches both the outer and the inner peripheral wall (9 and 8 respectively) of the delivery space (6) at in each case at least one advancing sealing line. The sealing line at the inlet-side end of the outer peripheral wall (9) is advanced relative to the 0.degree./360.degree. position by an angle (.alpha.) between 5.degree. and 50.degree., the peripheral wall (9) forming a circular arc (9') in this angle region.

Spiral rotary piston displacement machine with advanced inlet sealing

In a displacement machine for compressible media on the spiral principle, the rotor disk (2) terminates radially flush with the displacement strips (3, 3'). So that the disk (2) can pass through the housing, in the inlet region (12, 12') of the machine the inner web (18, 18') of one housing half (7) is lowered by the amount of the disk thickness. To prevent leaks during the operation of the machine, the transition (19, 19') between the raised web (17, 17') and the lowered web (18, 18') is made circular. The rounding cooperates with a clearance (20, 20') in the form of an arc of a circle in the disk (2). Machines of this type are especially suitable for the supercharging of internal-combustion engines.

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Regensdorf, Switzerland

Roland Kolb