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WO/1991/002224A1 |
The silicon sensing element of a mass airflow sensor is shielded from direct impact by large dust particles by means of a plastic deflector that is disposed in spaced upstream relationship to the entrance of a by-pass venturi containing ...
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WO/1991/000987A1 |
The invention concerns an air-flow meter, in particular one for measuring the flow of air aspirated by an internal-combustion engine. The flow meter has a main flow channel (11) with a Venturi section (24), and a temperature-dependent me...
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WO/1990/005291A1 |
Process and device for withdrawing liquid samples from a flow line leading from a first container to a second container. During the transfer of a volume of test liquid, a volume representative of the total volume of liquid transferred is...
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WO/1989/012802A1 |
A flowmeter measuring mass flow rate or volume flow rate or mass and volume flow rates of fluid comprises a pair of flow passages (3 and 4) and a pair of flow sensors (7 and 8) respectively measuring flow rates through the two flow passa...
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WO/1988/010411A1 |
The present invention, the object of which is to provide a hot wire type air flow meter capable of accurately detecting an air suction rate of an internal combustion engine and stabilizing the flow distribution, relates to a hot wire typ...
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WO/1982/004120A1 |
A flow splitting device (10) for use in fluid flow meters and the like including an outer housing (12) forming a cavity having an inlet (28) and an outlet (30), a porous baffle (32) dividing the cavity into an inlet chamber (35) and an o...
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WO/1982/001670A1 |
Drag is produced in a gas stream by a bluff body (47), and is converted to low pressure stable and continuous vortices by a restriction (56). The difference in gas pressure is sensed (14) between a point (15) outside the flow passage in ...
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WO/1982/001087A1 |
A fluid delivery monitor (10) having a flow sensor (48), accumulator (70) for recording the duration of sensed flow, a code device (74) to display the contents of and reset the accumulator upon entry of a preselected sequence, and a flui...
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JP6022064B2 |
A method for determining fluid characteristics of a multicomponent fluid is provided. The method includes a step of measuring a first density, ρ1, of a multicomponent fluid comprising one or more incompressible components and one or mor...
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JP5260817B2 |
An integrated module is provided for measuring a flow rate of a fluid, whether gaseous or liquid, with a flow restrictor comprising a plurality of orifices adapted to a flow channel of the integrated module and a sensor mounted to measur...
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JP5209837B2 |
A device for determining at least one parameter of a flowing medium. The device including an element, for example in the form of a bulge, in the channel in which the measuring element is positioned, which deflects the foreign particles a...
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JP4933497B2 |
The invention relates to a gas flow measuring apparatus. The flow detecting elements are provided at the sub-passage (4) for making the part of fluid to be measured (gas) flow. The wall of the sub-passage (4) contains a leak hole (throug...
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JP4833551B2 |
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 ...
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JP4748296B2 |
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JP4700242B2 |
The match with a measurement characteristic curve of a device for air flow measurement is disturbed by pulsations, soiling and poor flow behavior. An improvement in the measuring performance of the device is achieved by provisions, which...
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JP4686455B2 |
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JP4669530B2 |
A measuring device for measuring the mass of a medium flowing in a flow line, in particular the aspirated air mass of an internal combustion engine, including a measuring element bathed by the flowing medium and disposed in a flow condui...
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JP4637088B2 |
Differential pressure generator for a gas meter arrangement comprises an array of ducts within the differential pressure generator that is inserted in a gas pipe to produce a measurable pressure drop. The ducts (40) are arranged in conce...
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JP4608843B2 |
The flow amount measuring apparatus has two detecting portions for generating signal indicative of flow amount respectively. The outputs of two detecting portions are subject to a differential amplification to obtain large output signal ...
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JP4544992B2 |
A mass flow controller (200) comprises; a mass flow sensor (202) configured to produce a mass flow signal representative of a gas flow through the mass flow controller (200), and an electronic controller 400 configured to produce a close...
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JP4534526B2 |
A flow velocity measuring device is provided to be able to conduct a fluid to a sensor element after removal of dust and dirt contained in the fluid to accurately measure the flow velocity of the fluid even when the fluid is low in flow ...
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JP4537067B2 |
A thermal mass flow controller includes a sensor assembly, a valve assembly, and mass flow controller housing. A thermal ground limits the conductive thermal path between the mass flow controller housing and the sensor assembly and, due ...
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JP4448699B2 |
An air mass sensor has a three-part configuration formed of an insertion element, a measuring channel element and a housing element for accommodating an evaluation device. In order to be able to provide flexible insertion elements for a ...
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JP4425784B2 |
An integratable fluid flow and property microsensor assembly is configured to be operably embedded in a microfluidic cartridge of the type used in lab-on-a-chip systems. The assembly is a robust package having a microstructure flow senso...
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JP4245046B2 |
A mass flow controller arranged to perform mass flow test operation in the controller itself by incorporating a test tank. The mass flow controller is provided, in a channel (6) for feeding fluid, with a means (8) for detecting the mass ...
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JP4210122B2 |
The invention relates to a heating resistor type flow measuring device comprising a housing (50) having a support part (3) provided between a frame body (4) and a connector (2) and connected to the mounting part (15A) of a fluid passage ...
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JP4189070B2 |
A flow proportioning assembly for dividing a portion of a fluid flow such as gas for presentation to a sensor includes a holder member having a central opening and forming an exterior peripheral passageway when inserted within a conduit ...
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JP4174321B2 |
An air temperature detector 12 is disposed close to an auxiliary passage sidewall 15, which has an auxiliary passage wall hole 9 formed near the air temperature detector 12. A heat-sensitive resistor 13 is also disposed close to the auxi...
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JP4169803B2 |
A measuring device serves to measure the mass of a medium flowing in a line along the primary flow direction, in particular the mass of aspirated air of an internal combustion engine. The measuring device has a measuring element bathed b...
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JP4170900B2 |
The invention relates to a gas flow measuring apparatus. The flow detecting elements are provided at the sub-passage (4) for making the part of fluid to be measured (gas) flow. The wall of the sub-passage (4) contains a leak hole (throug...
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JP4168417B2 |
One or a plurality of branch paths ( 3 ) having opening end portions ( 2 ) formed in the vicinity of an inner wall surface of a main path ( 1 ) through which a fluid flows so as to point the upstream or downstream side of the main path, ...
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JP4170095B2 |
A resistance heater 134 for detecting an air flow rate is supported by support members 134A, 134B. A housing 110 contains an electronic circuit 140 connected to the resistance heater 134. The housing 110 is formed by integral molding wit...
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JP4169802B2 |
A measuring device for measuring the mass of a medium flowing in a flow line, in particular the aspirated air mass of an internal combustion engine, including a measuring element bathed by the flowing medium and disposed in a flow condui...
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JP4166705B2 |
An air flow rate measuring device serves to measure a flow rate of air flowing through a main passage inside an intake pipe of an engine. A base has its one end directed axially of the main passage toward an upstream side of air flowing ...
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JP4140553B2 |
An airflow meter has a bypass passage disposed in an air passage and a sensing portion disposed in the bypass passage to detect an airflow amount. The bypass passage is provided with a restriction portion to gradually decrease a passage ...
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JP4137153B2 |
In order to extract a part of a three-phase flow from a pipe line (23), a pair of communication pipes (13), which are connected to upstream and downstream sides of an orifice (12) provided in the pipe line (23), and a gas-liquid extracti...
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JP4116343B2 |
The gas meter (3) is arranged in a bypass (2) of a gas line (1). In the bypass, a closing device (4,4') is provided in front of and behind a sensor (31) of the gas meter, to interrupt the gas supply. The closing devices may be arranged i...
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JP4090242B2 |
A thermal mass flow sensor in which heat transfer to and from a fluid flowing through a sensor conduit is optimized by establishing a symmetrical triangular temperature distribution along a heated length of the sensor conduit. The sensor...
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JP4089654B2 |
A measurement body is provided with a sub-outlet arranged between a U-turn portion of a bypass passage and a main outlet. The sub-outlet includes a first sub-outlet positioned on a path of air, which flows on the inside of the bypass pas...
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JP4086057B2 |
A mass flow controller arranged to perform mass flow test operation in the controller itself by incorporating a test tank. The mass flow controller is provided, in a channel (6) for feeding fluid, with a means (8) for detecting the mass ...
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JP2008511836A |
A method of making a plurality of flow sensors is provided, each flow sensor having a substrate with a sensing element and flow channel aligned over the sensing element. The sensing element senses at least one property of a fluid. The fl...
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JP4076992B2 |
The present invention relates to a thermal flowmeter capable of sensing a flow rate in either direction, having a linear output characteristic, and producing a stable output without impairing the response characteristic. In the thermal f...
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JP4034379B2 |
A flow meter is adapted to measure the flow rate of a fluid flowing in the interior of a sensing conduit. The flow meter includes one sensor element disposed along the flow path of the fluid externally of the sensing conduit closer to on...
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JP4034251B2 |
An intake device for an internal combustion engine includes a restriction valve provided in an air intake path of the engine, and an air flow rate sensor for measuring the amount of air suctioned into the air intake path which is provide...
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JP2008500533A |
A system for measuring air flow rate in a duct includes an air flow sensor and an air flow conditioning device for collecting and accelerating a portion of the total air stream to the sensor, which may be means as known in the art. The c...
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JP4019413B2 |
To solve the problem that a mean intake-air flow rate to be found by a computing operation does not agree with a mean value of a true intake-air flow rate because in conventional cass a region to be corrected with reference to an output ...
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JP3995103B2 |
In order to counteract errors of measurement in pulsed flows, the device (1) has an axially extending measuring channel (33) in which is fitted a temperature-sensitive measuring element (20). The measuring channel (33) extends from an in...
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JP3985801B2 |
A sensing unit is constructed of a heater element and a temperature sensing element. The sensing unit is arranged in a region, in which measurement air, which flows into the inflow passage through the bypass inlet, bends at the substanti...
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JP3964347B2 |
To provide an inlet system for an internal combustion engine capable of carrying out the most suitable fuel injection even when a throttle valve starts to open by accurately measuring an inlet amount. The inlet system for the internal co...
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JP3853842B2 |
PCT No. PCT/DE95/01477 Sec. 371 Date Aug. 26, 1996 Sec. 102(e) Date Aug. 26, 1996 PCT Filed Oct. 24, 1995 PCT Pub. No. WO96/16317 PCT Pub. Date May 30, 1996A device for measuring the mass of a flowing medium by use of a temperature-depen...
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