AIR FLOW MEASUREMENT FOR ENGINE CONTROL.

A search for improved sensors to measure and control engine parameters has grown from an effort to improve the fuel economy and to lower emissions output of automobile engines. One necessary requirement is the accurate measure of engine intake air. If this can be achieved, then the control system designer will be able to determine the correct amount of fuel to be injected for accomplishment of a desired operation. One of the techniques being used operates upon the vortex measurement principle. The technique developed by J-TEC utilizes a non-intrusive method to avoid flow disturbance by projecting an ultrasonic beam across the vortex path.