Showing papers on "Spark (mathematics) published in 1978"

High energy spark ignition system

Abstract: A pulse transformer produces sufficient energy at its secondary winding to initiate arcing of a spark gap in response to the interruption of current flow to its primary winding. Upon initial arcing of the spark gap, a charged capacitor is coupled across the gap thereby extending arcing duration beyond that produced by the coil. The total spark energy is determined by the value of the capacitor and the voltage to which it is charged. The invention is adaptable to provide spark energy to each cyclinder of a multicylinder engine without the need for a distributor.

Electronic ignition control apparatus

Abstract: In an electronic ignition control apparatus for an engine, an actual optimum spark advance angle for activation of a spark plug is determined as a value defined by a linear equation representing a relationship between an optimum spark advance angle and an amount of air sucked into the engine in consideration with an actual rotation speed by using a stored optimum spark advance angle defined by a reference linear equation representing a relationship between the stored optimum spark advance angle and an amount of the sucked air in consideration with a predetermined rotation speed

A picosecond time of flight spectrometer for the VEPP-2M based on local-discharge spark counter

Abstract: This work describes time of flight spectrometer based on two localized-discharge spark counters operating on line with a computer. The resolution time of the spark counter itself is a=30 psec. The spectrometer also utilizes six scintillation counters to reject the background and allow additional determination of particle type. The spectrometer is designed for the measurement of the form factor of 'TT mesons in the 360-800 MeV energy range on the VEPP-ZM, with differentiation of e, 1-1 and n events on the basis of time of flight.

Computational Procedures for Characterization of High Voltage Spark Sources

Abstract: Equations and a calculation procedure for modeling the operation of an electronic, adjustable-waveform and other types of high voltage spark sources are presented. The equations return time-dependent capacitor voltage and charging current and the calculation procedure returns complete break patterns. Comparisons between laboratory and computed results indicate the calculations predict experiment with accuracy in the 1 to 5% relative error range. This is sufficient to make the calculation procedure useful for characterization of research or production spark sources.

Digital ignition timing controller

Abstract: A digital electronic spark timing control for an internal combustion engine. Independent parameters such as engine speed and manifold pressure are measured and encoded as multibit digital words. A digital memory stores spark advance angle as a function of two independent parameters. The digital memory is addressed by the most significant bits of the multibit words to obtain coarse values of spark timing. Interpolation is performed on the coarse values according to the least significant bits of the digital words to produce the spark advance angle appropriate for the measured parameters. Means synchronized with engine position, i.e., top center, convert the spark advance angle to spark initiation signal.

Measurement Procedures for Characterization of High Voltage Spark Sources

Abstract: Procedures are presented for calibration of electronic adjustable waveform capacitor discharge spark sources. Both individual component measurements and system measurements are discussed. Characterization of components and subsystems involved in capacitor charging, spark formation, and discharge current control is described. Specific measurement devices and techniques are discussed, and precision requirements for various degrees of characterization of both components and systems are given. Application of the characterization procedures to routine source monitoring and to source development are also presented.

Ignition system with ignition current and minimum spark duration controls

Abstract: To prevent misfires, the current through an ignition coil is increased in response to an error signal indicating that the actual spark duration was less than a predetermined minimum spark duration. At the start of the spark, a capacitor is discharged at a known rate. The time required for the voltage across the capacitor to reach a predetermined level is the desired spark duration. This regulation of ignition current causes the spark duration to be very close to the minimum spark duration, thereby cutting losses in the apparatus.

Method for controlling the distribution of spark voltages to engine multiple cylinders

Abstract: A method for controlling the distribution of spark voltages generated by an ignition coil to spark plugs provided on multiple cylinders of a combustion engine. A spark voltage distributor is provided with a rotatable electrode connected to the ignition coil and multiple stationary electrodes connected to the respective spark plugs. The rotatable electrode is rotated by an electric motor at a speed depending upon the rotation speed of an engine output shaft and the rotational position of the output shaft indicative of the timing of spark voltage generation so that the engagement of the rotatable electrode with the stationary electrodes is synchronized with the spark voltage generation.

Spark timing control method and device

Abstract: An optimum spark timing angle, i.e. spark advance or spark advance angle, is computed for an automobile internal combustion engine by a computing unit on the basis of at least two operational parameters of an engine. An intake manifold vacuum signal during an intake stroke of one cylinder of the engine is stored or delayed a given time, and then an intake manifold vacuum signal and a rotational speed signal of the engine are delivered to a computing unit which computes a spark advance for the specific cylinder.

A spark calorimeter

Abstract: This note describes the design of a spark calorimeter suitable for routine use. Wherever possible commercially available parts have been used to facilitate construction and minimise cost. Compared with existing methods of calorimetry, the present design possesses the important advantage of enabling the heat released by single sparks to be measured.

Ignition plug tester

Abstract: PURPOSE:To inspect propriety of discharging gap, by connecting test plug and standard gap in parallel, impressing high voltage pulse, detecting existence of spark in the standard gap and judging number of spark frequency.

Controlled-duration continuous-wave high-frequency ignition system

Abstract: An ignition system for internal combustion engines. It concerns an improvement for a controlled-duration continuous-wave high-frequency system, that has an output transformer with a control winding thereon. The system has an oscillator with the output transformer included therein. The oscillator generates spark energy, and an engine-timed unit controls an electronic switch that starts and stops the oscillator by breaking and making a loading circuit for the control winding. The improvement concerns a time constant element in electronic circuit means between the engine-timed unit and the electronic switch. The arrangement is such that the engine-timed unit controls the beginning of all spark intervals, and the end of each spark interval at less than a predetermined speed of the engine. But, only the time constant element controls the end of each spark interval at more than the predetermined speed of the engine.

Rotation detecting circuit

Abstract: PURPOSE:To detect the number of revolutions in quick response and with high accuracy by establishing a saw-tooth waveform voltage for each spark signal of an internal combustion engine and by comparing the saw-tooth waveform voltage with a refe rence voltage which corresponds to the number of revolutions (or frequency) to be detected.

Operating method for sparkkignitin engine

Abstract: PURPOSE:To make it possible to cycle the processes smoothly by advancing focibly an ignition time at the time of cycling from a spark ignition process to a compression ignition process.

Electron advance device

Abstract: PURPOSE:To simplify the composition by dividing the factors to determine a spark time between the complicated correspondence to the spark advance and the simple one.

Lap ignitor for burner

Abstract: PURPOSE:To prevent a spark plug from consuming at electrodes and power consumption by automatically stopping the spark of the plug to stabilize the ignition.

Electro spark machine

Abstract: PURPOSE:To provide an electric machining apparatus for machining a workpiece by giving relative swinging motion to electrode and workpiece, and which permits uniformly machined surface to be obtained through constant feed speed control.

Multiple discharge spark power source to prevent carbon deposit of discharge plug with contact surface

Abstract: PURPOSE:To remove effectively carbon deposit attached to the contact surface by means of the circuit which is increased spark energy especially the circuit combined with multiple spark power source.