THERMAL ANEMOMETRIC TRANSDUCER OF FLOW RATE OF MEDIUM Russian patent published in 1998 - IPC

FIELD: electronic fuel injection systems for automobiles. SUBSTANCE: given transducer of flow rate of medium has temperature-sensitive element composed of temperature-sensitive resistors, measurement 5 and thermal compensation 6, made from foil on thin polyimide film 8 stretched in advance and anchored between two identical metal substrates 9, 10. Through depression 11 is made in each substrate to end face 13 of substrate in zone of location of temperature-sensitive resistor 5 which has chamfer 12 at angle of more than 45 deg to straight line perpendicular to direction of flow of medium. Coefficient of thermal expansion of material of substrates is close to that of temperature-sensitive resistors. EFFECT: increased functional reliability and efficiency of transducer. 1 cl, 3 dwg