Pressure sensor of air inlet manifold branch
A technology of intake manifold pressure and sensors, applied in electrical control, machine/engine, fuel injection control, etc., can solve the problem of low control accuracy and achieve the effect of precise control accuracy
Inactive Publication Date: 2009-01-21
Zhejiang Xinye Electronic Technology Co Ltd
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Problems solved by technology
To adjust the output voltage of a sensor with this structure, it must be done before the entire sensor product is packaged, and it cannot be adjusted after packaging.
Therefore, when the operator makes an adjustment error, no remedial measures can be taken, and this adjusted sensor product becomes a waste product; moreover, because the variable resistor is used to adjust its output voltage, the control accuracy is not high
Method used
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Embodiment Construction
[0014] Referring to the accompanying drawings, this intake manifold pressure sensor includes a housing 3, a circuit board 2, and a pressure sensing element 5. The circuit board 2 is placed in the housing 3, and the pressure transmitting and sensing elements 5 are set On the circuit board 2, the pressure sensitive element 5 is a resistance bridge composed of four piezoresistors to sense pressure, and a thermistor 4 is also arranged in the housing 3 to sense the pressure of the air in the intake manifold. temperature, the circuit board 2 is provided with a ZMD31010 type conditioning chip 6, the signal input end of the conditioning chip 6 is connected to the output end of the pressure sensitive element 5, and the conditioning chip 6 has a USB communication interface connected to a computer . When the product of the present invention is tested or debugged, after the air intake joint 1 is connected to the automobile intake manifold, the software dedicated to setting the parameters ...
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The invention discloses a pressure sensor for an intake manifold, belonging to the automobile engine control technology. The pressure sensor comprises a shell (3), a circuit board (2) and a pressure-sensitive component (5), wherein the circuit board is arranged in the shell, and the pressure-sensitive component is arranged on the circuit board. The pressure sensor is characterized in that a conditioning chip (6) is arranged on the circuit board; the signal input end of the conditioning chip is connected with the output end of the pressure-sensitive component; and the conditioning chip has a communication interface connected with a computer. The pressure sensor for the intake manifold having the conditioning chip needs no resistor-capacitor components and has no error brought by the temperature drift of external resistor-capacitor components, and the parameters of the pressure sensor are set on the computer through the communication interface. Therefore, the pressure sensor can precisely output the voltage through the settings of the computer according to the pressure of an intake manifold for an automobile, so as to control fuel injectors of automobile engines with high control precision; and when the pressure sensor is applied to the automobile engines, the pressure sensor has the characteristics of saving fuel and producing little waste gas.
Description
technical field [0001] The present invention relates to intake manifold pressure sensors for automotive engines. Background technique [0002] The intake manifold pressure sensor is installed on the intake manifold of the automobile and is used to detect the pressure of the intake manifold of the electronically controlled oil injection system. It measures the pressure change in the intake manifold according to the load state of the engine. And convert it into a voltage signal and output it to the control system of the electronic control unit as the basis for determining the basic fuel injection quantity of the fuel injector, so as to achieve the effect of energy saving. After the measured pressure is converted into a voltage signal, the output value of the voltage signal can be adjusted before the sensor leaves the factory. These pressure sensors have a test process before the product leaves the factory, so the electronic components are packaged after the test is completed....
Claims
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IPC IPC(8): F02D41/26
Inventor 余成巧王勇彪
Owner Zhejiang Xinye Electronic Technology Co Ltd