摘要:
A motor controller unit facilitates modifying pressure thresholds and motor operation mode for an air compressor in a hybrid commercial vehicle as a function of vehicle air demand and comprises a processor configured to execute computer-executable instructions comprising monitoring vehicle air system pressure, calculating air demand generated by the vehicle air system, and determining that the vehicle air system air demand is greater than a predetermined air demand threshold. A cut-out pressure threshold for the compressor motor is increased and the air compressor motor is switched from an on/off mode to a continuous run mode wherein pressure is maintained in the air system to be between a cut-in pressure threshold and the increased cut-out pressure threshold. The compressor motor operates in the continuous run mode until air demand falls below the predetermined air demand threshold.
摘要:
An electronic air charge controller for a tractor trailer vehicle air brake system includes a micro controller, a first pressure sensor interface coupled to the micro controller, a second pressure sensor interface coupled to the micro controller, and a vehicle control protocol interface coupled to the micro controller. The micro controller, in response to a signal received from the first pressure sensor interface indicative of an air supply recharge condition, a signal received from the second pressure sensor indicative of parking brake engagement condition, and a signal from the vehicle control protocol interface indicative of an engine start condition, supplies a maximum engine speed control signal to the vehicle control protocol interface. The time required to charge the air supply system to the required normal operating level is thereby minimized. In addition, a transmission sensor interface is preferably coupled to the micro controller. The micro controller does not generate the maximum engine speed control signal unless a signal supplied by the transmission sensor interface indicates that an automatic transmission is in park or a manual transmission is in neutral. Still further, to improve operating efficiency, a vehicle load condition signal is supplied by the vehicle control protocol interface to the micro controller. In response, the micro controller supplies a pause air compressor charging cycle signal or a pause air dryer recycle signal to the vehicle control protocol interface, if either the air compressor or air dryer is operating when a high load condition is encountered.
摘要:
A piston assembly is provided for an unloader valve of an air compressor. The assembly comprises an unloader piston having a first bore of a first diameter, and a second bore of a second diameter which is smaller than the diameter of the first bore. The assembly also comprises a coil spring having a central opening, one end portion disposed in the second bore, and an opposite end portion extending into the first bore. The assembly further comprises a balance piston including a head portion sized to be disposed in the first bore, a first stem portion extending from the head portion and having a diameter smaller than the first and second bores, and a second stem portion extending from the first stem portion and extending into the central opening of the coil spring and having a diameter smaller than the first stem portion.
摘要:
Die Erfindung betrifft ein Verfahren zum Betreiben eines Druckluftsystems eines Fahrzeugs, insbesondere eines Nutzfahrzeugs, wobei das Druckluftsystem (3) wenigstens einen Druckluft-Kreis (11, 13, 15, 17), insbesondere wenigstens einen Druckluft-Bremskreis zur Bremsung des Fahrzeugs, aufweist, wobei der Druckluft-Kreis (11, 13, 15) wenigstens eine Luft-Speichereinrichtung (20), insbesondere wenigstens einen Luft-Speicherbehälter, zur Zwischenspeicherung von Druckluft aufweist, wobei eine Druck-Ermittlungseinrichtung (27), insbesondere ein Drucksensor, vorgesehen ist, mittels der der aktuelle Luftdruck in der Luft-Speichereinrichtung (20) ermittelt wird, wobei eine Steuereinrichtung (5, 9, 21) vorgesehen ist, mittels der der Luftdruck in der Luft-Speichereinrichtung (20) in Abhängigkeit von dem ermittelten Luftdruck gesteuert wird, wobei, sofern der ermittelte Luftdruck einen definierten Einschalt-Druckwert (p E1 , p E2 ) unterschreitet, mittels der Steuereinrichtung (5, 9, 21) der Luftdruck in der Luft-Speichereinrichtung (20) bis zum Erreichen eines definierten, größer als der Einschalt-Druckwert (p E1 , p E2 ) ausgebildeten Ausschalt-Druckwerts (p A1 , p A2 ) selbsttätig erhöht wird. Erfindungsgemäß ist eine Beladungszustand-Ermittlungseinrichtung (23) vorgesehen, mittels der der aktuelle Beladungszustand des Fahrzeugs (1) ermittelt wird. Zudem wird, insbesondere zur Verringerung des Energieverbrauchs des Druckluftsystems (3), mittels der Steuereinrichtung (5, 9, 21) der Einschalt-Druckwert (p E1 , p E2 ) und/oder der Ausschalt-Druckwert (p A1 , p A2 ) in Abhängigkeit von dem ermittelten Beladungszustand des Fahrzeugs (1) selbsttätig eingestellt und/oder verstellt.
摘要:
The present invention relates to a method for controlling a compressed air system (1) of a motor vehicle, wherein a piston compressor (2) is driven by a motor (6) of the motor vehicle, the delivering state of the piston compressor (2) being controlled by a delivery control device (7) and the delivery control device (7) being actuated by a compressor control module (8). According to the invention, compressed air is generated in a compressed air reservoir (5) by the piston compressor (2) in a charging phase, wherein at least one measurement variable is measured by at least one sensor (11) and, thereafter, the at least one measurement variable is compared with an associated threshold value, and wherein the delivery rate of the compressed air is reduced by the control of the piston compressor (2) when the threshold value is exceeded or undershot. The invention further relates to a compressed air system (1) for carrying out the method and to a vehicle comprising such a compressed air system (1).