Abstract:
A method of operating exhaust gas recirculation pump for an internal combustion engine including: providing an EGR pump assembly including an electric motor coupled to a roots device having rotors, the EGR pump operably connected to an internal combustion engine; providing an EGR control unit linked to the EGR pump assembly; providing sensors linked to the EGR control unit; determining if a motor speed is within a predetermined target in step S1 wherein when motor speed=predetermined target then; determining if a motor torque is within a predetermined target in step S2 wherein when motor torque=predetermined target then; determining if a motor temperature is within a predetermined target in step S3 wherein when motor gratuerature=predetermined target then; and maintaining operation of the exhaust gas recirculation pump.
Abstract:
A high pressure threshold detection circuit (100) is provided. The high pressure threshold detection circuit includes a pressure transducer (110) for measuring a pressure of a medium at an outlet (104) of a compressor (102). The high pressure threshold detection circuit (100) includes a controller (120). The controller (120) includes a comparator (123) and a switch (125). The comparator (123) and the switch (125) are electrically coupled. The switch (125) is electrically coupled to an enable circuit (131). The pressure transducer (110) is electrically coupled to the comparator (123) to provide a signal to the comparator (123) based on the pressure measured at the outlet (104). The comparator (123) outputs a control signal (111) to the switch (125) when the signal (111) is equal to or greater than a reference value (126). The switch (125) opens the enable circuit (131) to disable compression of the medium by the compressor (102) in response to the control signal (111).
Abstract:
Inlet valve containing a housing (17) with an entry (18) and an exit (19) and an internal part (17b) which together with an external part (17a) delimits a flow channel (20) between entry (18) and exit (19), whereby this flow channe1 (20) is closable by a valve (21) f characterised in that this valve (21) comprises a piston (24) and a valve member (25), whereby the piston (24) is slidable in the housing (17) and is connected with the exit (19) and whereby the valve member (25) is formed by a valve shaft piston (33) which is slidable in the piston (24) such that in rest mode the valve member (25) is pushed by the piston (24) against a valve seat, whereby between the valve shaft piston (33) and the piston (23) a chamber (41) is enclosed which can come into fluid connection with the pressure vessel (8) and is provided with a blow-off exit (42) which forms a fluid connection between the chamber (41) and the entry (18), whereby the valve shaft piston (33) contains a bypass channel (44) which is connected with the chamber (41) and the sidewall of the valve shaft piston (33).
Abstract:
System for the control of a compression system and method for controlling the compression system, said compression system comprising compressors (C1-C7) and their controllers (Al- A7) for the compression of the fluid medium, secondary treatment devices for the treatment of the medium delivered from the compressors, and piping systems (17-19, 23) for conducting the fluid medium to a place of consumption (16, 22), said control system comprising a control unit (3) containing a data processing system (34) for controlling the compression system, a user interface (35) including a display associated with it and transmission means for the transmission of control data between the control unit, the controllers and pressure sensors. The compression system can have a number of adjustment values, which determine the requirement for fluid medium, the change in direction of it and the rate of change, wherein a compressor-specific adjustment value is based on parameters given from the user interface, wherein an adjustment value is converted into a network delivery request or into a network pressure setting or into a compressor-specific pressure setting, wherein the control system is adapted to convert a network delivery request or a network pressure setting or a compressor- specific pressure setting into compressor-specific control requests via the direct control data, pressure setting or a pressure data item of the compressor.
Abstract:
Compressor device for compressing gas that comprises a compressor element (2) with a housing (3) with, an inlet (3) and an outlet (6), whereby at least one rotor is affixed in the housing (3) that is provided with a drive (7), whereby the compressor device (1) is provided with an oil circuit (16) for injecting oil into the housing (3) f characterised in that the oil circuit (16) only comprises one pump (23) for driving the oil around in the oil circuit (16), whereby this pump (23) is coupled to a first shaft (9) via a first disengageable coupling (24), more specifically a shaft (9) of the aforementioned drive (7) on the one hand, and to a second shaft (27) via a second disengageable coupling (28), more specifically a shaft (27) of a secondary drive (25) on the other hand, whereby the first and second disengageable couplings (24, 28) between the pump (23) and the first shaft (9) and between the pump (23) and the second shaft (27) are such that the pump (23) is only driven by the shaft of these two shafts (9, 27) that has the highest speed.
Abstract:
Système et méthode de pompage comprenant : une pompe à vide primaire sèche à vis (3) avec un orifice d'entrée des gaz (2) relié à une enceinte à vide (1) et un orifice de sortie des gaz (4) donnant dans un conduit (5) avant de déboucher dans la sortie des gaz (8) du système de pompage (SP), un clapet anti-retour (6) positionné dans le conduit (5) entre l'orifice de sortie des gaz (4) et la sortie des gaz (8), et un éjecteur (7) branché en parallèle au clapet anti-retour (6). La pompe à vide primaire sèche à vis (3) est mise en marche afin de pomper les gaz contenus dans l'enceinte à vide (1) par l'orifice de sortie des gaz (4). De manière simultanée, l'éjecteur (7) est alimenté en fluide moteur, et l'éjecteur (7) continue d'être alimenté en fluide moteur tout le temps que la pompe à vide primaire sèche à vis (3) pompe les gaz contenus dans l'enceinte à vide (1) et/ou tout le temps que la pompe à vide primaire sèche à vis (3) maintient une pression définie dans l'enceinte à vide (1).
Abstract:
Es wird ein Verfahren zur Steuerung eines Fahrzeugkompressors beschrieben. Hierbei wird das Ein- und Ausschalten des Kompressors durch eine Steuereinrichtung gesteuert, wobei der Wiedereinschaltzeitpunkt des Kompressors nach einer Abkühlung desselben durch Ermitteln der Abkühlzeit des Kompressors auf Basis der ermittelten Kompressortemperatur bestimmt und der Kompressor von der Steuereinrichtung entsprechend angesteuert wird. Die Abkühlzeit des Kompressors wird hierbei unter Berücksichtigung der Fahrzeuggeschwindigkeit ermittelt. Auf diese Weise lässt sich die Arbeitsweise des Fahrzeugkompressors besonders genau steuern, insbesondere kann der Kompressor früher als bei den Verfahren des Standes der Technik wieder eingeschaltet werden.