Abstract: Included in an internal combustion engine electronic ignition system of the type having discrete circuits responsive to each selected half cycle of a series of engine synchronized alternating current timing signals for effecting engine speed ignition spark advance adjustment and for producing a series of substantially square wave electrical signals having trailing edges substantially coincident with the point of zero crossover of each selected half cycle into the next half cycle is circuitry responsive to the square wave electrical signals for inhibiting engine speed ignition spark advance adjustment with engine speeds less than a selected value.

Abstract: An internal combustion engine ignition distributor wherein the circumferentially disposed stationary output electrodes carried by the distributor cap are made up of a resistive material having a predetermined resistance value per unit length.

Abstract: In an internal combustion engine ignition distributor, an ignition spark energy conductive circuit arranged for connection to the secondary winding of an ignition coil is so formed and positioned that it is substantially equally radially spaced from each of the distributor output circuits and an annular insulating rib rotated with the rotor is disposed within the space between the ignition spark energy conductive circuit and the distributor output circuits. The annular insulating rib supports and locates radial circumferentially spaced juxtaposed conductive inserts in spark gap relationship with both the ignition spark energy conductive circuit and successive ones of the distributor output circuits upon the rotation thereof.

Abstract: A unitary dynamoelectric machine brush holder formed to provide a brush accommodating recess bounded on three sides by two opposing substantially parallel side segments and a transverse segment. Extending from one of the side segments is a pair of spaced spring retainer members formed to provide respective spring retaining recesses in which is mounted a unitary torsion spring having two coils separated by a loop portion that extends between the spring retainer members into the brush accommodating recess and is arranged to exert pressure on a brush located within the brush accommodating recess.

Abstract: An electrical pressure signal that varies directly in magnitude with changes of fuel line pressure at the fuel injector is raised to a selected mathematical power. This signal is then differentiated to detect the negative rate thereof that occurs at the point of inflection upon the start of fuel injection and a "start of fuel injection" output signal is produced in response to the detection of the point of inflection as indicated by the negative rate.

Abstract: An internal combustion engine ignition distributor wherein the circumferentially disposed stationary output electrodes carried by the distributor cap are made up of a resistive material having a predetermined resistance value per unit length. The resistive material may be (1) an electrically resistive, resin bonded mixture of metal, carbon and ferrite powders or (2) an electrically resistive, epoxy resin bonded mixture of copper alloy powder, manganese-zinc-ferrite powder and carbon powder.

Abstract: Two spaced capacitors are connected in parallel across each supply lead of a brush-commutator type electric motor and the motor frame to provide a PI filter for each brush in which the length of brush lead between the capacitors comprises the inductor element of the filter. To facilitate this arrangement, one of the capacitors for each brush is mounted upon one side of an annular support member of an insulating material and an electrically conductive plate arranged to electrically engage the motor frame upon assembly is mounted upon the other side with electrical connections extending through the support member to interconnect one terminal end of each of the capacitors to the conductive plate and to secure the conductive plate to the support member.

Abstract: An internal combustion engine ignition system comprising the combination of an electronic data processor unit that is adapted to calculate an ignition spark event engine crankshaft angle, an associated electronic control unit, and a source of alternating current timing signals. The electronic control unit is responsive to the alternating current timing signals to produce an engine crankshaft position reference signal that is supplied as an input engine crankshaft position reference signal to the data processor unit and also is capable of effecting ignition spark in response to the alternating current timing signals during periods of engine crank and during periods of data processor unit malfunction.

Abstract: The electric drive motor of an internal combustion engine radiator cooling fan that is arranged to be energized by the output potential of a dynamoelectric generator driven by the engine is supplied with operating potential in such a manner that the average supplied drive motor power is directly proportional to engine speed while engine temperature is within the range between a predetermined first temperature and a predetermined higher second temperature and the engine is operating within a selected speed range.

Abstract: A positive temperature coefficient resistor element of the type that has a substantially constant resistance value when the temperature thereof is less than a selected value and that displays a rapid rise in resistance value when the temperature thereof reaches and increases beyond the selected value is mounted in thermal communication with a Diesel engine and is arranged to be electrically energized and deenergized simultaneously with the engine glow plug energizing circuit.

Abstract: The collector-emitter electrodes of each of two NPN transistors having the collector electrode of each direct current cross connected to the base electrode of the other are connected, respectively, across an operating potential source through a collector load resistor element and an active collector load element. A biasing circuit arrangement is effective upon each application of supply potential to activate the active collector load element a period of time later than that at which base-emitter drive current is initiated through the base-emitter junction of the NPN transistor having the collector-emitter electrodes thereof connected across the supply potential source through the active collector load element whereby this transistor is always triggered conductive first upon each application of supply potential.

Abstract: A system for effecting the adjustment of the armature of a solenoid into a desired position as indicated by an input analog signal representation of desired armature position. When the actual position of the solenoid armature does not correspond to the desired position in a first or in a second relationship, respective mutually exclusive first and second proportional and respective corresponding mutually exclusive first and second integral error signals are produced. The corresponding proportional and integral error signals are summed and circuitry responsive to the sum of these signals effects the adjustment of the solenoid armature into the desired armature position.

Abstract: A vehicle power seat adjuster control system that provides for the pulsed reversal of rotation of the armature of the operating motor of a vehicle power seat adjuster mechanism each time the operating motor is deenergized at the conclusion of each seat adjusting operation.

Abstract: A separable series of secondary cells is connected across a charge circuit upon the application of supply potential. When the charge potential level upon a selected portion of the secondary cell series attains a predetermined magnitude, the selected portion is disconnected from the charge circuit. When the charge potential level upon the remainder of the secondary cell series subsequently attains a predetermined magnitude, all of the secondary cells are reconnected in series until the charge potential level upon all of the secondary cells of the series attains another higher predetermined potential level at which time the charge circuit is disabled.

Abstract: Electrical circuitry including a single absolute pressure transducer that is arranged to be exposed to substantially atmospheric pressure during a selected associated internal combustion engine operating condition produces an electrical pressure value indicating signal that is stored only when the pressure transducer is exposed to substantially atmospheric pressure. An electronic data processor unit preprogrammed to calculate a selected engine operating parameter value for the associated engine is preprogrammed to periodically effect a predetermined atmospheric pressure correction of the selected engine operating parameter value when the stored electrical pressure value indicating signal differs in a selected sense from a preselected value.

Abstract: An internal combustion engine crankshaft reference signal pulse corresponding to a selected one engine cylinder pair and a series of crankshaft position signal pulses are generated during each crankshaft revolution and a crankshaft reference signal pulse corresponding to each other engine cylinder pair is synthesized during each crankshaft revolution. In response to each crankshft reference signal pulse and the subsequent crankshaft position signal pulses there is produced an ignition dwell signal effective to initiate ignition coil primary winding energization and later an ignition spark event signal that is effective to terminate ignition coil primary winding energization to thereby produce an ignition spark potential at the engine crankshaft angle at which an ignition spark event is to occur as calculated by an associated external data processor unit.

Abstract: A commutatorless direct current motor drive system that initiates rotation of a permanent magnet rotor from standstill upon the application of supply potential and then sustains rotor rotation by sequentially energizing the polyphase stator phase windings in response to the alternating current potential waveforms induced in the stator phase windings by the magnetic field of the permanent magnet rotor upon rotor rotation.

Abstract: During the presence of a selected internal combustion engine operating parameter such as a coolant temperature range, the alternating current timing signals induced in the output coil of an electrical generator assembly having at least a rotor member rotated in timed relationship with the engine are overridden by the output signal of a circuit combination that produces the output signal during the positive going portion of each of the timing signals and maintains the output signal for a period of time that varies inversely in duration as the potential level with respect to ground of an engine speed variable potential signal varies directly with engine speed to provide an engine speed ignition spark retard that diminishes substantially linearly in value from maximum to minimum between selected first lower and second higher engine speeds.

Abstract: A commutatorless direct current motor drive system that initiates rotation of a permanent magnet rotor from standstill upon the application of supply potential and then sustains rotor rotation by sequentially energizing the polyphase stator phase windings in response to the alternating current potential waveforms induced in the stator phase windings by the magnetic field of the permanent magnet rotor upon rotor rotation.

Abstract: In an internal combustion engine electronic ignition system of the type responsive to each of a series of alternating current timing signals of an amplitude directly proportional to engine speed that are induced in the output coil of an electrical generator assembly having at least a rotor member rotated in timed relationship with the engine, the timing signals are overriden by the output signal of a circuit combination that is responsive to a potential level of a predetermined magnitude across the electrical generator assembly output coil to provide an engine speed ignition spark advance within increasing engine speeds greater than a selected value that substantially follows a desired engine speed ignition spark advance curve.