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Air flow meter and engine control system using the same
Air flow meter and engine control system using the same
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机译:空气流量计和使用其的发动机控制系统
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摘要
PURPOSE: To reduce output fluctuation of an air flowmeter and stabilize detection accuracy even with the provision of activation circuit to a heater resistor type air flowmeter. ;CONSTITUTION: Each medium point of a bridge circuit 1 provided with a heater resistor RH for an air flowrate measurement and a temperature compensation resistor RC is connected to each input terminal of a differential amplifier 3. In between the output side of the differential amplifier 3 and the base of transistor T1 as a heat current control element 2, an activation circuit 4 consisting of R10 to R12 is connected. When the differential amplifier 3 is in negative offset input voltage characteristic at the power onset, an activation signal is input from the activation circuit 4 to the heat current element 2.;COPYRIGHT: (C)1993,JPO&Japio
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