Patent application number | Description | Published |
20090126477 | Air Flow Measuring Instrument - An air flow measuring instrument, comprising: an auxiliary passage | 05-21-2009 |
20090173151 | HEATING RESISTOR TYPE AIR FLOW RATE MEASURING DEVICE - An object of the present invention is to provide a structure which prevents a particulate contaminant and a liquid contaminant on which centrifugal separation hardly works, from arriving at a sensor element part. In order to attain the above described object, in a heat resistor type air flow rate measuring device which includes an auxiliary passage taking in a part of a fluid flowing in a main passage, and a plate-shaped sensor element installed in the aforesaid auxiliary passage and for detecting a flow rate of the fluid, and is a heat resistor type flow rate measuring device having an auxiliary passage formed along a curved line at | 07-09-2009 |
20100242589 | Thermal Type Flow Measuring Device - A first sub passage portion and a second sub passage portion are configured so as to form layers on both sides of a separation wall, respectively. A linear passage portion of a third sub passage portion is formed so that a cross section thereof extends within a range across both sides of the separation wall in a direction perpendicular to a wall surface of the separation wall. The cross section is taken along a direction perpendicular to a flow direction of a fluid flowing through the linear passage portion. The separation wall separates the layer of the first sub passage portion and the layer of the second sub passage portion from each other. A first communication passage portion which allows the first sub passage portion to communicate with the third sub passage portion curves to make a directional change and connects a passage wall surface of the first sub passage portion to a side wall of the third sub passage portion by an inclined surface. The passage wall surface is defined by the separation wall. The side wall is located on a side of the second sub passage portion with respect to the separation wall. A through passage which passes through the separation wall is provided in a second communication passage portion which allows the second sub passage portion to communicate with the third sub passage portion. | 09-30-2010 |
20100275685 | Thermal Air Flowmeter - An object of the invention is to provide a thermal air flowmeter which can reduce a detection error occurring during pulsating air flow due to a difference of response between rising and falling of detected flow or due to air flow dependence of response. A thermal air flowmeter | 11-04-2010 |
20110072895 | Flow-Rate Measurement Apparatus - A plate-shaped board is arranged so that fluid passages are respectively formed at a sensor-element mounting surface side of the plate-shaped board and at a backside surface side thereof being opposed to the sensor-element mounting surface side, a curved passage portion is provided which is located upstream of the plate-shaped board and changes its direction so as to form a curved line, and the curved passage portion has an outer-side wall surface including a sloping portion that slopes so that, of two edge portions of the outer-side wall surface in a direction perpendicular to board surfaces of the plate-shaped board, the edge portion located on a sidewall surface, facing the sensor-element mounting surface, of the curved passage portion is positioned closer to an inner wall surface of the curved passage portion than the edge portion located on a sidewall surface opposed to the first sidewall surface, along the sidewall surfaces. | 03-31-2011 |
20110140211 | Flow Sensor, Method for Manufacturing Flow Sensor and Flow Sensor Module - The invention provides a flow sensor structure for sealing the surface of an electric control circuit and a part of a semiconductor device via a manufacturing method capable of preventing occurrence of flash or chip crack when clamping the semiconductor device via a mold. The invention provides a flow sensor structure comprising a semiconductor device having an air flow sensing unit and a diaphragm formed thereto, and a board or a lead frame having an electric control circuit for controlling the semiconductor device disposed thereto, wherein a surface of the electric control circuit and a part of a surface of the semiconductor device is covered with resin while having the air flow sensing unit portion exposed. The invention further provides flow sensor structure in which surfaces of a resin mold, a board or a pre-mold component surrounding the semiconductor device are continuously not in contact with three walls of the semiconductor device orthogonal to a side on which the air flow sensing unit portion is disposed, or a manufacturing method for absorbing the dimensional variation of the semiconductor device by the deformation of springs or deformation of an elastic film in the thickness direction. | 06-16-2011 |
20120060599 | Thermal Type Air Flow Meter - A thermal type air flow meter that is capable of suppressing deformation of a base member at the time of molding is disclosed, to thereby secure dimension accuracy and reduce an influence of a dimension change on measuring accuracy. The meter includes a housing member placed in an intake passage of an internal combustion engine, and a base member fixed to the housing member and includes a secondary air passage into which part of air passing through the intake passage flows. The base member is a plate-like resin molded component formed of a synthetic resin material and includes a reinforcing structure integrally formed between a board fixing part to which a circuit board is fixed; and a secondary passage constituting part formed at a leading end part of the board fixing part, the reinforcing structure enhancing strength of the base member. | 03-15-2012 |
20130152675 | Thermal Fluid Flow Rate Measurement Device - Provided is a thermal fluid flow rate measurement device that inhibits the thermal fluid flow rate measurement device and peripheral parts from thermally affecting an intake air temperature detection element and measures an intake air temperature with high accuracy. The thermal fluid flow rate measurement device includes an auxiliary passage | 06-20-2013 |
20130192388 | Flow Sensor and Manufacturing Method of the Same and Flow Sensor Module and Manufacturing Method of the Same - Technique of suppressing performance variations for each flow sensor is provided. In a flow sensor FS | 08-01-2013 |
20140109691 | Flow Sensor and Manufacturing Method of the Same and Flow Sensor Module and Manufacturing Method of the Same - Technique of suppressing performance variations for each flow sensor is provided. In a flow sensor FS | 04-24-2014 |
20140190273 | Flow Sensor and Manufacturing Method of the Same and Flow Sensor Module and Manufacturing Method of the Same - Technique of suppressing performance variations for each flow sensor is provided. In a flow sensor FS | 07-10-2014 |
20140352424 | AIRFLOW MEASURING APPARATUS - Airflow measuring apparatus compring: sub-passage that takes in part of flow of fluid flowing through an intake pipe; sensor element that is disposed in the sub-passage to measure the flow of fluid; a circuit part that converts the flow of fluid detected by the sensor element into an electric signal; connector part connected to the circuit part to output a signal externally; and casing that supports the sensor element and the circuit part, the sensor element being disposed in the intake pipe. The sensor element includes a cavity disposed at a semiconductor substrate, a diaphragm including a thin film part that covers the cavity. The sensor element on a lead frame have surfaces that are mold-packaged with resin so that a diaphragm of the sensor element and part of the lead frame are exposed. One hole is disposed at the lead frame for communication between the cavity and exterior. | 12-04-2014 |
20140360261 | Thermal Type Air Flow Meter Having a Reinforcing Structure Provided on the Base Member between the Board Fixing Part and the Secondary Passage Constituting Part - A thermal type air flow meter that is capable of suppressing deformation of a base member at the time of molding is disclosed, to thereby secure dimension accuracy and reduce an influence of a dimension change on measuring accuracy. The meter includes a housing member placed in an intake passage of an internal combustion engine, and a base member fixed to the housing member and includes a secondary air passage into which part of air passing through the intake passage flows. The base member is a plate-like resin molded component formed of a synthetic resin material and includes a reinforcing structure integrally formed between a board fixing part to which a circuit board is fixed; and a secondary passage constituting part formed at a leading end part of the board fixing part, the reinforcing structure enhancing strength of the base member. | 12-11-2014 |