Ford Motor Company Limited

Louis R Focht

Chester J Blechinger

A device for measuring the velocity of fluid includes a vortex generating means positioned in the fluid stream so that vortices are formed in the wake of the generating means. Plates elongated in the direction of fluid flow are positioned adjacent the vortex generating means to improve detection of the vortices by increasing the signal to noise ratio.

Vortex shedding mass air flow sensor with stabilized fluid flow

A combination pressure and knock sensor produces an electrical signal in response to the intake manifold absolute pressure of an internal combustion engine. A high pass filter is coupled to the output of the sensor for providing a signal indicative of engine knock. A low pass filter is coupled to the output of the sensor for providing a signal indicative of absolute intake manifold vacuum pressure.

Engine pressure and knock sensor

Velocity and mass air flow sensor

An engine operating parameter which anticipates knock, such as throttle angle position, is used in combination with a knock sensor to generate a control signal to retard engine spark. For example, the relatively slow response of a low noise sensed knock signal can be compensated by a relatively fast response signal indicating change in the throttle angle position. Thus earlier and improved control of knock can be achieved.

Engine knock anticipation

This specification discloses an apparatus and method for providing electrically distinguishable signals occurring as a function of the position of a moving element. The electrical signals are generated by a piezoelectric apparatus and can be used to determine a variable such as revolutions per minute of the movable element. Particular ones of the electrically distinguishable signals can be used for initiating a function such as the firing of the spark plugs.

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Farmington Hills, MI, United States of America

Louis R Focht