Hey Folks;
Does anyone have any detailed technical info on the Bosch Air Flow Sensor used in the fuel injected cars? The schematic I have implies that the resistance between 7 and 8 (or 7 and 6) is proportional to the air flow but I tried measuring it and the resistance seems to rise and then fall again. I opened it up and it looks very peculiar - resistors printed on ceramic (that's 70's technology for sure) but I can't work out what it is supposed to be doing. It appears to be a continuous resistor and moving contact - like a regular potentiometer - but with a bunch of fixed resistors connected at various points along the way. There are lots of unconnected bits so the part was clearly made for more than one purpose.
HELP???
/wallywest
Does anyone have any detailed technical info on the Bosch Air Flow Sensor used in the fuel injected cars? The schematic I have implies that the resistance between 7 and 8 (or 7 and 6) is proportional to the air flow but I tried measuring it and the resistance seems to rise and then fall again. I opened it up and it looks very peculiar - resistors printed on ceramic (that's 70's technology for sure) but I can't work out what it is supposed to be doing. It appears to be a continuous resistor and moving contact - like a regular potentiometer - but with a bunch of fixed resistors connected at various points along the way. There are lots of unconnected bits so the part was clearly made for more than one purpose.
HELP???
/wallywest