| 摘要 |
<p>PURPOSE:To decrease the fluctuation in the resistance value of an exothermic resistor and to inprove the reliability in the juncture by providing a hollow part to the inner side of a winding which forms the insulating layer of the exothermic resistor and connecting both ends of the winding and lead wires respectively at one point. CONSTITUTION:The exothermic resistor as a means of measuring the intake air flow rate of an internal combustion engine is constituted of the winding 3 wound with a platinum wire 3, an alumina layer 2 formed on the winding 3, a glass layer 1 formed on the alumina layer 2, the lead wires 4 for external drawing out provided to both ends of the winding 3 and supporting pins 6 which support the winding 3 and the lead wires 4. The hollow part 5 is provided to the inner side of the winding 3 wound with the exothermic resistor. The winding 3 and the lead wires 4 are connected at one point by the platinum wire 7 for connection at both ends of the winding 3 of the exothermic resistor. The fluctuation in the resistance value of the exothermic resistor is suppressed to a low level in this way and the reliability in the juncture of the platinum winding and the lead wire is improved.</p> |
