摘要:
A sensor device for determining at least one parameter of a fluid medium flowing through a duct, e.g., an intake air mass flow of an internal combustion engine, includes: a sensor housing, e.g., a sensor plug that is placed or that can be placed into a flow tube, in which the duct is fashioned; and at least one sensor chip situated in the duct for determining the parameter of the fluid medium. The sensor chip has a sensor area. The sensor housing has an inlet into the duct that is oriented opposite a main direction of flow of the fluid medium, and has at least one outlet from the duct. The sensor area is covered at least partly by an electrically conductive layer.
摘要:
A plug-in sensor is provided which is suitable for determining at least one parameter of a fluid medium flowing in a main flow direction, especially of an intake air mass of an internal combustion engine flowing through a flow pipe. The plug-in sensor has a plug part that is able to be mounted in the flowing fluid medium, in a specified alignment to the main flow direction. In the plug part, at least one flow channel is provided having at least one inlet opening and at least one outlet opening, in the at least one flow channel at least one sensor is accommodated for determining the at least one parameter. The plug part has a profile at which at least one local pressure minimum sets in in the flowing fluid medium. The at least one outlet opening is situated at the side of the plug part, in the region of the at least one pressure minimum.
摘要:
A flowmeter for detecting at least one property of a fluid medium flowing through a flow tube, in particular a flow property, is described. The flowmeter has at least one ultrasonic sensor for detecting at least one first flow property of the fluid medium. In addition, the flowmeter has at least one differential pressure sensor for detecting at least one second flow property of the fluid medium.
摘要:
A sensor system for determining at least one parameter of a fluid medium flowing in a main flow direction has at least one sensor situated in the fluid medium, for determining the parameter of the fluid medium, and at least one grating situated transversely to the main flow direction and having at least one crosstie, the crosstie having a crosstie depth directed essentially in the main flow direction. The crosstie has at least one recess, the crosstie depth being reduced in the recess.
摘要:
A flow meter for use in a flowing fluid medium includes at least one ultrasonic transducer and at least one measuring section having at least one flow pipe through which a fluid medium flows in a main direction of flow. The ultrasonic transducer is equipped to emit ultrasonic signals essentially parallel to the main direction of flow into the measuring section. The ultrasonic transducer is separated from the flow pipe by at least one thermal decoupling element. The thermal decoupling element is equipped to reduce heat transfer from the flow pipe to the ultrasonic transducer.
摘要:
A flow guide element is provided for guiding a flow of a fluid medium which is particularly suitable for use in an intake tract of an internal combustion engine. The flow guide element includes a flow tube having an elbow for diverting the flow. In the region of the elbow there is situated, in this case, at least one flow baffle having at least one deflector. The deflector is penetrated by an opening, going right through the flow baffle, in at least one area.
摘要:
Measuring volume flows or mass flows in the intake system of motor vehicle internal combustion engines plays an important role in reducing harmful emissions. Therefore, an ultrasonic flow meter for measuring a flow velocity of a fluid flowing in an essentially laminar flow in the main flow direction is described. The ultrasonic flow meter has at least two ultrasonic transducers, the ultrasonic transducers being able to emit and/or receive ultrasonic waves at an angle α to the main flow direction which is different from 90°. Furthermore, the ultrasonic flow meter has at least one turbulator situated upstream from at least one ultrasonic transducer in the main flow direction of the fluid, which generates longitudinal eddies in at least one zone adjacent to the at least one ultrasonic transducer, in particular in a protrusion in a wall of a flow pipe and thus improves the flow of the fluid in this zone in the flow pipe. Wedge-shaped turbulators protruding into the flow of the fluid or flow grooves are provided in particular as turbulators. The ultrasonic flow meter is distinguished, in comparison with devices known from the related art, by improved signal-to-noise ratio and thus by higher measurement accuracy.
摘要:
A fluid sensor may be used for detecting fluid media, in particular hydrogen. The fluid sensor includes a sensor chip having a chip surface, which has a measuring surface and a body surface. Printed conductors of a central sensor circuit having at least one heating element and at least one temperature sensor are provided on the measuring surface. Furthermore, the fluid sensor has one additional fracture detection element and one fracture detection circuit situated on the sensor chip. The fracture detection circuit is designed for detecting fractures and/or cracks in and/or on the sensor chip, in particular in the area of a boundary between the measuring surface and body surface.
摘要:
A device is provided for determining at least one parameter of a medium flowing in a line in a main flow direction, e.g., a parameter of the intake air mass of an internal combustion engine. The device includes a part, which is inserted into the line at a predetermined alignment with respect to the main flow direction in such a way that a partial flow of the medium flowing in the line in the main flow direction flows through at least one measuring channel provided in the part in a first direction from an intake of the measuring channel to an outlet of the measuring channel. The device further includes a measuring element situated in the measuring channel for determining the at least one parameter. Between its intake and its outlet, the measuring channel features at least one channel segment in which a mechanism is located that causes flow vortices in this channel segment, whereby liquid droplets and solid particles are advantageously deposited on the inner wall of the channel before they can reach the measuring element.
摘要:
In a device for determining at least one parameter of a medium flowing in a main direction of flow in a line, which device has a part that can be inserted into the line with a predeterminable orientation in relation to the main direction of flow in such a manner that a partial stream of the medium flowing in the line passes into an entry region of a channel structure formed in the part, a measuring channel, provided with a measuring element for determining the at least one parameter, branching off from the entry region and the entry region having a separation zone which is separated from the measuring channel and has at least one separation aperture, which separation aperture opens into the line at a side wall of the part, which side wall extends substantially parallel to the main direction of flow, the part advantageously has at least one wind shield which is disposed downstream of the at least one separation aperture in the direction of the main direction of flow and which projects from the side wall provided with the separation aperture.