Abstract: An electronic fuel control system of the type providing fuel delivery controlling signals during the period of time that at least a portion of a controlled signal maintains a preselected relationship with respect to particular value is provided with circuit means for continuously providing a variable correction factor. The injection controlling signal is produced by generating a time varying voltage which varies in a predetermined fashion following the occurrence of a triggering event. The generated voltage signal has a first or correction portion and a second or injection controlling portion. The magnitude of the first portion is modulated as a function of the time elapsed from the most recently to have occurred triggering event to provide accurate information to controllably affect fuel delivery.

Abstract: A circuit for generating an rpm responsive information signal for electronic fuel control systems designed to provide intermittent actuation of a fuel delivery system is illustrated herein. In an electronic fuel control system which relies upon excursions of a controlled voltage through a selected threshold level to generate the injection controlling signal, a circuit is provided to control the variation, as a function of engine rpm, of the initial value of the injection controlling voltage. Means are also illustrated for updating the engine rpm information at least once per engine triggering event to provide improved fuel delivery response to variations in engine rpm.

Abstract: An inductive load driver circuit comprising first and second switch means and high and low impedance load current decay means. For the duration of a load actuation signal the first switch means are responsive to the magnitude of the load current to complete and interrupt a first current path to the load to cycle the load current between first and second levels. The second switch means are enabled for the duration of the load actuation signal to complete a second current path to the load when the first switch means interrupts the first current path. When completed the second current path comprises the low impedance decay means allowing the load current to decay slowly from the first current level to the second level to provide during such slow decay a load current sufficient to maintain actuation of the inductive load.

Abstract: A pulse width computer for a fuel-injected internal combustion engine generates injector actuation control pulses, the widths of which increase with decreasing engine temperature. These actuation control pulses are normally applied to control an injector drive circuit that, in turn, controls the duration of activation of one or more electromagnetically-actuated injectors in synchronization with the engine cycle. During engine cranking operations, the widths of the injector actuation control pulses are also integrated on a capacitor to generate a voltage that is compared with a temperature dependent reference voltage selected to represent an incipient flood condition. When the capacitor voltage is detected as having increased to this reference voltage, the comparator causes an attenuation of the injector actuation control pulse. In one embodiment, the injector actuation control pulse is attenuated by being inhibited for the remainder of the cranking period after which the capacitor is suitably discharged.

Abstract: A fuel inlet assembly for a fuel injection valve comprises a coil bobbin having at least one terminal insulating post extending axially through a radial flange on the inlet connector. The post has an axial terminal slot therein to receive a thin section of a terminal and comprises a welding-and-dimple aperture directly over the terminal slot ending in a radial dimple locking wall thereover. The terminal comprises a dimple across substantially the entire narrow width thereof, the dimple cooperating with the dimple locking wall after the terminal is inserted into the terminal slot to retain the terminal therein.

Abstract: A roughness sensor for measuring cycle-to-cycle decreases in engine speed comprises engine-event responsive flip flop means for controlling the alternate store-up and subsequent count-down of contents into a first storage means simultaneously with the alternate count-down and the store-up of contents into a second storage means. The storage means feed respective first and second comparators that produce respective first and second output pulses the widths of which are determined by the interval between the time a corresponding storage means is counted down to its starting value and the time of the next flip flop transition. A raw roughness output pulse in the form of just one but not both or neither comparator output pulses is passed by exclusive OR logic means to a speed normalization means that also receives the contents of the storage means opposite to that producing the raw roughness pulse.

Abstract: A low-cost precise-metering uniform-fuel-breakup fuel injection valve comprises narrow arcuate slots etched through a thin spray disc located downstream of a metering orifice and comprises a plurality of narrow slots of length and width sufficient to break up the fuel first into thin sheets and then into small droplets of uniform diameter.

Abstract: A low-cost precise-metering uniform-fuel-breakup fuel injection valve comprises narrow arcuate slots etched through a thin spray disc located downstream of a metering orifice and upstream thereof comprises a ball seat for providing a circular edge contact with a slightly smaller ball valve carried on the free end of a flexible stem. The fixed end of the stem is secured within a loosely supported armature having a central passage telescoping a substantial length of the flexible stem and inducing a smooth central fuel flow towards the ball valve and seat.

Abstract: A combined fuel pump control circuit, intermittent injection electronic fuel control system is disclosed herein to provide optimum fuel delivery at constant operating pressure to the fuel injector valve means of an electronically controlled fuel supply system and to eliminate fuel return means. By energizing the pump in response to the engine operating parameters which determine the engine fuel requirement, fuel as calculated to meet the fuel requirement is provided thereby eliminating the need for fuel, in excess of that required by the engine, to be recirculated from the area of the engine back to the fuel reservoir. In order to intermittently energize the fuel pump, the pump is provided with signals which correspond to the injector valve energizing signals in timing and duration.

Abstract: A shell-like light weight low-cost ambulatory rocking device comprises top and bottom portions, the top portion comprising a centrally located top surface bounded at each of its outboard ends by a depressed foot placement platform and the bottom portion comprising a centrally located arcuate portion bounded at each of its outboard ends by a longitudinally extending downwardly depending rocking motion limiting ridge.

Abstract: A first pair of DDAs for interpolating along a predetermined MAP-RPM-Fuel schedule for an internal combustion engine and a second pair for iterpolating along a predetermined MAP-TEMP-ENRICH schedule. Each DDA interpolates along a predetermind specific schedule for a number of iterations directly proportional to the magnitude of one of the engine dependent parameters comprising the schedule without necessitating any intervening conversion into or out of a binary number. The first DDA of each pair using slope and intersection data from a small memory interpolates linearly along at least two contiguous segments and feeds the second DDA which by feeding different register stages to different adders interpolates nonlinearly to effect a predetermined logarithmic relationship. The outputs of the two pairs are summed and then suitably clocked to selectively gate different fuel injectors.

Abstract: A circuit for recognizing and providing warm-up enrichment fuel compensation for an electronic fuel control system is described herein. The circuit is adapted to recognize and respond to an engine operating parameter indicative of engine operation at an engine temperature less than the normal operating temperature and to increase the duration of the fuel injection command pulse generated by the main electronic fuel control system. In those electronic fuel control systems which provide a fuel injection command pulse whenever a generated voltage wave shape is below a threshold value, the present invention contemplates altering the shape of the generated wave shape to delay its excursion through the threshold value.