Abstract: A transducer for creating an electrical signal proportional to the angular position of a member pivotally mounted on a given axis, which transducer comprises an element pivoted directly by the member and containing a means for creating a flux field linearly varying in intensity along a given operating line extending in an air gap between spaced portions and having a preselected arcuate shape. A linear Hall Effect device, with an output voltage proportional to the intensity of the flux field to which the device is exposed, is mounted at a fixed position on the operating line and in the air gap. Consequently, as the element is pivoted by the monitored member, the output voltage from the Hall Effect device varies proportionally to the position of the Hall Effect device along the operating line.

Abstract: An auxiliary air by-pass actuator valve of small size is disclosed which provides a quick response to the changing RPM of the engine due to changing loads. The actuator employs a stationary D-shaped orifice in communication with a rotatable valve member and D-shaped disc to regulate the amount of auxiliary air which by-passes the throttle blade in an electronic fuel injection system.

Abstract: The invention is disclosed in the preferred embodiment as an electronic feedback carburetor system wherein, in the closed-loop mode of operation, an oxygen sensor monitors the oxygen concentration of the exhaust gases and supplies a signal to an electronic control unit which in turn causes a command signal to be supplied to the carburetor for adjusting the air/fuel ratio to a commanded value. The electronic control unit contains unique circuitry which selectively provides closed-loop and open-loop modes of operation depending upon the condition of other input signals to the electronic control unit. The circuitry contains integrator and stability circuits which are both utilized in the closed-loop mode to develop from the oxygen sensor signal a composite signal which provides for closely regulated control of the air/fuel ratio about a desired operating point at or in the vicinity of stoichiometric.

Abstract: A photoelectric transducer mounting for a fluid flowmeter featuring a flexible, one-piece, unitary plastic insulating mounting clip in which the phototransducer elements are mounted. The clip which is accessible from the exterior of the flowmeter housing, is readily removably attachable thereto without disassembling of the flowmeter and also provides a connector body for a plurality of electrically conductive connector pins electrically connected to the leads of the phototransducer elements and avoids extending the electrical wiring leads through the flowmeter housing.

Abstract: A housing containing a pair of electronic circuit boards removably mounts on the side of an engine air filter housing. The circuit board housing has a generally concave inner face matching the convex contour of the air filter housing side wall and is disposed over air circulation openings in the air filter housing side wall. In a first embodiment, the circuit board housing is of one-piece construction and the electronic circuit boards are disposed interiorly of the outer wall of the circuit board housing and in generally parallel relationship therewith. In a second embodiment, the circuit board housing is of two-piece construction having upper and lower halves. In this embodiment, the circuit boards are horizontally disposed, one each in each of the two housing halves. Connectors for effecting connection of the circuit boards with the other components of the system which are located exteriorly of the air cleaner housing extend through holes in the circuit board housing.

Abstract: A housing containing a pair of electronic circuit boards removably mounts on the side of an engine air filter housing. The circuit board housing has a generally concave inner face matching the convex contour of the air filter housing side wall and is disposed over air circulation openings in the air filter housing side wall. In a first embodiment, the circuit board housing is of one-piece construction and the electronic circuit boards are disposed interiorly of the outer wall of the circuit board housing and in generally parallel relationship therewith. In a second embodiment, the circuit board housing is of two-piece construction having upper and lower halves. In this embodiment, the circuit boards are horizontally disposed, one each in each of the two housing halves. Connectors for effecting connection of the circuit boards with the other components of the system which are located exteriorly of the air cleaner housing extend through holes in the circuit board housing.