摘要:
An electronic compressed air system for vehicles includes a compressed air supply part having a compressor, a compressed air consumer part having load circuits forming an air-suspension circuit, and service-brake circuits having reservoirs. The load circuits are supplied with compressed air via solenoid valves. The pressure in the load circuits is monitored by pressure sensors whose signals are evaluated by an ECU that controls the solenoid valves. The solenoid valve of the air-suspension circuit does not include reservoirs and is closed in the de-energized normal state. The solenoid valves of other load circuits, especially of the service-brake circuits are open in the de-energized normal state. With a pressure demand of the air-suspension circuit, the associated solenoid valve is switched by the ECU to open position to establish communication with the compressed air supply part and/or with the service-brake circuits or with the reservoirs thereof, to refill the air-suspension circuit.
摘要:
The invention relates to a control device (3) for a compressed air preparation device (1) of a vehicle (2), wherein the control device (3) outputs output signals for adjusting feed phases and regeneration phases of the compressed air preparation device (1), wherein a compressor (4) feeds compressed air via an air dryer having a desiccant (6a) into a compressed air reservoir (8) in a feed phase, and compressed air is fed out of the compressed air reservoir (8) through the air dryer (6) for drying the desicant (6a) in a regeneration phase. According to the invention, the control device (3) adjusts the regeneration phases depending on a current or future engine load and/or a current or future consumption of compressed air by the vehicle (2). Particularly in coasting phases, excessive drying of the desiccant to a low moisture can occur, in order to save fuel in later travel segments. Route-optimized regeneration of the desiccant as a function of engine load and/or utilization phases is also possible.
摘要:
To detect a defect or failure of a compressed air load circuit in a compressed air system for vehicles, pressure is measured in compressed air load circuits and evaluated in an electronic control unit, which briefly shuts off the compressed air load circuits, measures pressure values and/or determines pressure gradients during the shutoff time and compares the pressure values and/or the determined pressure gradients with a respective threshold value, identifies defective circuits and definitively shuts off circuits detected as defective if the results are below the threshold value.
摘要:
To detect a failure of a compressed air consumer circuit in a compressed air system for vehicles, pressure is continuously measured in compressed air consumer circuits and evaluated in an electronic control unit which compares the pressure values and/or determined negative pressure gradients of the compressed air consumer circuits with a respective threshold value and shuts off an air-consumer circuit if the pressure values and/or negative pressure gradients thereof satisfy a circuit-failure criterion. The circuit-failure criterion is satisfied when the pressure values and/or pressure gradients are below the respective threshold value for a time equal to or longer than the time of a dynamic pressure change or of a dynamic pressure collapse.
摘要:
A thermal engine that comprises a rotary element. A plurality of drive elements are arranged in the rotary element. Each drive has a plurality of piston/cylinder arranged around a common central expansion space. Piston heads of the pistons abut on a power transmission surface of the rotary element in order to drive the same.
摘要:
An air cargo transportation method, a transport plane and an air cargo transport system. In the air cargo transportation method for the transport of various cargoes to different destinations, a transport plane is provided first that flies through at least three air regions respectively associated to a station. The transport plane does not land at one of the stations. Instead, the cargo is transported between the transport plane and one of the stations by an airworthy feeders, the cargo being transferred between the feeder and the transport plane while in the air. The transport plane and two feeders form the air cargo transport system, wherein the transport plane may comprise two interconnected feeders. With the air cargo transportation method, the utilization of the transport plane is enhanced. Further, the transport ways for individual cargo items can be shortened so that the efficiency is improved.
摘要:
To detect a defect or failure of a compressed air load circuit in a compressed air system for vehicles, pressure is measured in compressed air load circuits and evaluated in an electronic control unit, which briefly shuts off the compressed air load circuits, measures pressure values and/or determines pressure gradients during the shutoff time and compares the pressure values and/or the determined pressure gradients with a respective threshold value, identifies defective circuits and definitively shuts off circuits detected as defective if the results are below the threshold value.
摘要:
An electronic compressed air system for vehicles includes a compressed air supply part having a compressor, a compressed air consumer part having load circuits forming an air-suspension circuit, and service-brake circuits having reservoirs. The load circuits are supplied with compressed air via solenoid valves. The pressure in the load circuits is monitored by pressure sensors whose signals are evaluated by an ECU that controls the solenoid valves. The solenoid valve of the air-suspension circuit does not include reservoirs and is closed in the de-energized normal state. The solenoid valves of other load circuits, especially of the service-brake circuits are open in the de-energized normal state. With a pressure demand of the air-suspension circuit, the associated solenoid valve is switched by the ECU to open position to establish communication with the compressed air supply part and/or with the service-brake circuits or with the reservoirs thereof, to refill the air-suspension circuit.
摘要:
The invention relates to a compressed air supply system for motor vehicles comprising a compressed air supply part consisting of a compressor, an air drying part comprising an air dryer, a filter, a valve and a compressed air consumer part consisting of compressed air consumer circuits provided with operational brake circuits, which are supplied with compressed air via a multi-circuit safety valve. The operational brake circuits and optionally, at least one other compressed air consumer circuit comprises compressed air containers and the pressure in said compressed air consumer circuits is monitored by sensors, the electric signals of which are evaluated by an electronic control device. Said electronic control device (84) is configured in such a manner that in order to determine parameters of the compressed air supply system (2) and the size of the compressed air containers and the output of the compressor (7), when filling the compressed air consumer circuits (26, 28, 30, 32, 34, 36, 38), the compressed air increasing speed in a compressed air consumer circuit and the compressor speed and an air drying regeneration process is carried out after the compressed air consumer circuit is filled with compressed air from the container of said circuit. The time period of a predefined fall in pressure or the fall in pressure is determined over a predefined time period and the amount of air necessary for carrying out said regeneration process is deducted from the value of the fall in pressure, the regeneration time and the known diameter of the filter (108) and the volume of the container is determined therefrom. The output of the compressor (7) is determined from the volume of the container, the determined compressed air increasing speed and the compressor speed.
摘要:
An aircraft, in particular a VTOL craft, comprises a fuselage supporting at least a pair of wings. According to the disclosure, several propeller devices are connected to the fuselage and optionally to the pair of wings. The propeller devices may be pivoted about pivot axes independently of each other. The pivot axes are at an angle ≠0° to each other.