Oet Gmbh

Obrist Engineering Gmbh

Thyssenkrupp Automotive Ag

Obrist Powertrain Gmbh

Christian Busch

Frank Obrist

Roman Lässer

Oliver Obrist

Jochen Bont

Christian Schmälzle

Christian Schmaelzle

Peter Kuhn

Helmut Schön

Kai-Uwe Keller

Gordon Köhne

Uwe Wuitz

Christian Schmälzte

Markus Öttl

Roman LÄSSER

The invention relates to a scroll-type positive displacement machine, in particular a scroll compressor, comprising a highpressure chamber (), a low-pressure chamber (), an orbiting displacement spiral (), a counter spiral (), and a counterpressure chamber () which is located between the low-pressure chamber () and the displacement spiral (), wherein an outlet opening (), through which a compressed working medium flows into the high-pressure chamber () during operation, is centrally arranged in the counter spiral () in a high-pressure region, and wherein the displacement spiral () has at least a first and a second passage opening () for fluidic connection to the counter-pressure chamber (), wherein at least the first passage opening () is arranged in the region of the outlet opening () so that, during operation, the first passage opening () and the outlet opening () temporarily overlap at least in sections.

Positive displacement machine, method, vehicle air conditioning system, and vehicle

A scroll compressor for generating oil-free compressed air, in particular for a compressed air brake system of a lorry, with a drive which is arranged in a housing and is connected to an orbiting displacer scroll which has a displacer scroll bottom and a displacer scroll wall. The displacer scroll wall engages into a stationary mating scroll, with the result that at least one variable compression chamber is formed between the displacer scroll and the mating scroll. A seal element is provided between the displacer scroll and the housing wherein the seal element is fastened in the displacer scroll bottom and seals against a sliding plate which is connected fixedly to the housing. A compressed air brake system with a scroll compressor of this type.

Scroll compressor for generating oil-free compressed air

A balancing mechanism for a positive displacement machine, in particular a scroll compressor, wherein the balancing mechanism includes a drive shaft, a first balancing element and a second balancing element. The first balancing element includes a cylindrical hub section and a first force transmission section and is rotatably in contact with the drive shaft via a first axis of rotation. The second balancing element is rotatably in contact with the drive shaft via a second axis of rotation. A center axis S of the drive shaft and a center axis C of the cylindrical hub section are arranged on a first reference line CS, and a center of gravity J of the first balancing element and a center of gravity K of the second balancing element are arranged on a different side of the first reference line CS than a center axis P of the first axis of rotation.

Balancing mechanism for scroll compressors

The invention relates to a scroll-type positive displacement machine, in particular a scroll compressor, comprising a highpressure chamber (), a low-pressure chamber (), an orbiting displacement spiral (), a counter spiral (), and a counterpressure chamber () which is located between the low-pressure chamber () and the displacement spiral (), the displacement spiral () engaging in the counter spiral () in such a way that, during operation, at least a first and a second compression chamber () for receiving a working medium are temporarily formed, and the displacement spiral () having at least one passage opening () for fluidic connection to the counter-pressure chamber (), wherein the passage opening () is located in the displacement spiral () in such a manner that, during operation, due to the orbiting movement of the displacement spiral (), at least sections of the passage opening () are temporarily arranged in the first compression chamber () and subsequently at least sections of the passage opening are temporarily arranged in the second compression chamber ().

Scroll machine with passage in spiral, method, vehicle air conditioning system, and vehicle

The invention relates to a displacement machine according to the spiral principle, in particular a scroll compressor or scroll expander, with a high-pressure chamber, a low-pressure chamber and an orbiting displacement spiral, which engages in a counter-spiral such that chambers are formed between the displacement spiral and the counter-spiral for receiving a working medium, wherein a counter-pressure chamber is formed between the low-pressure chamber and the displacement spiral. According to the invention a pressure regulating device which is fluidically connected to the counter-pressure chamber sets a pressure difference between the counter-pressure chamber and the low-pressure chamber by means of a set value specified by the computing unit.

Displacement machine according to the spiral principle, method to regulate pressure in the counter-pressure chamber by using a pressure difference and characteristic curve

The invention relates to a displacement machine according to the spiral principle, in particular a scroll compressor, with a high-pressure zone which comprises a high-pressure chamber, with a low-pressure chamber and with an orbiting displacement spiral, which engages into a counter spiral such that between the displacement spiral and the counter spiral compression chambers are formed, in order to receive a working medium, wherein between the low-pressure chamber and the displacement spiral a counter pressure chamber is formed. According to the invention, the displacement spiral has only one passage, which at least temporarily produces a fluid connection between the counter pressure chamber and at least one of the compression chambers, wherein the passage is formed in such a portion of the displacement spiral in which the passage in the activated state of the displacement machine is opened on reaching of 85%-100%, in particular of 90%-100%, in particular of 95%, of the relative compression chamber volume, and remains opened during a subsequent rotation, after opening, of the displacement spiral about a rotational angle of 120&#xb0;-360&#xb0;, in particular of 255&#xb0;-315&#xb0;, in particular of 270&#xb0;.

Displacement machine including only one displacement spiral passage and gas connection line in communication with a counter pressure chamber

The invention relates to a positive-displacement machine according to the spiral principle, particularly a scroll compressor, having a high-pressure region, which comprises a high-pressure chamber, furthermore having a low-pressure chamber and an orbiting positive-displacement spiral, which engages into a counterpart spiral in such a manner that compression chambers are formed between the positive-displacement spiral and the counterpart spiral, in order to accommodate a working medium, wherein a counterpart-pressure chamber is constructed between the low-pressure chamber and the positive-displacement spiral. According to the invention, the positive-displacement spiral has at least two passages, which at least temporarily produce a fluid connection between the counterpart-pressure chamber and at least one of the compression chambers, wherein a first passage is essentially constructed in a central section of the positive-displacement spiral and at least one second passage is constructed in the initial region of the positive-displacement spiral.

Positive-displacement machine according to the spiral principle, method for operating a positive-displacement machine, positive-displacement spiral, vehicle air-conditioning system and vehicle

A scroll-type compressor for a COvehicle air conditioning system, having a movable displacement spiral which is rotatably connected to an eccentric bearing and which engages into a counterpart spiral such that, between the windings of the displacement spiral and of the counterpart spiral, there are formed chambers which travel radially inward in order to compress the refrigerant and discharge the refrigerant into a pressure chamber, wherein the displacement spiral is arranged on the suction side and the counterpart spiral is arranged on the high-pressure side. The scroll-type compressor is wherein the eccentric bearing is arranged in the displacement chamber between the displacement spiral and the counterpart spiral and has a bearing bushing which is formed integrally with the displacement spiral and the base of which is in alignment with the face side of the windings of the displacement spiral.

[object Object]

A scroll-type compressor for a COvehicle air conditioning system, having a mechanical drive which is connected by a drive shaft to an eccentric bearing. A movable displacement spiral is rotatably connected to the eccentric bearing and engages into a counterpart spiral such that, between the displacement spiral and the counterpart spiral, radially inwardly traveling chambers are formed in order to compress the refrigerant and discharge it into a pressure chamber. Wherein the counterpart spiral is movable in alternating fashion relative to the displacement spiral in an axial direction, wherein, between the counterpart spiral and the displacement spiral, there is arranged at least one spring for exerting an axial release force on the counterpart spiral, and at least one piston engages on the counterpart spiral, in order to exert an axial closing force on the latter, adjacent to the pressure chamber in an off-center position.

Scroll-type compressor and CO2 vehicle air conditioning system having a scroll-type compressor

The invention relates to a device for the variable actuation of gas exchange valves for internal combustion engines, wherein at least one cam () pertaining to a camshaft () mounted in a housing rotates according to the engine speed. The cam () first drives an intermediate member () which performs a clear oscillating, rotary movement and has a rotational axis () that can be displaced in the housing parallel to itself along a curve of displacement (), said intermediate member comprising a control cam () having a lifting region () and actuating an output member () that, in turn, actuates at least one valve (). The aim of the invention is to enable one such device to be reliably controlled. To this end, the control cam () has a catch region (), and the intermediate member () is mounted on a bearing having an axis which corresponds to the rotational axis (), said bearing being arranged in such a way that it is guided in a forced manner and can be displaced parallel to the curve of displacement (), by means of an articulation () connected to the cylinder head or the housing or by a slide () that is guided in the housing in a positively locking manner. The invention also relates to a method for operating an internal combustion engine comprising a plurality of cylinders using at least one of the inventive devices.

Growing community of inventors

Feldkirch, Austria

Christian Busch