Showing papers on "Spark (mathematics) published in 1982"

The Effect of Spark Location on Combustion in a Variable-Swirl Engine

Abstract: Influence de la position de la bougie d'allumage sur la combustion dans un moteur a turbulence variable

Enhanced spark energy distributorless ignition system

Abstract: A distributorless ignition system of an internal combustion engine has a supplementary spark energy module to increase spark energy. Two ignition coils each have secondary coils with split secondary center taps. Each of the primary windings is coupled to its own ignition module. The supplementary spark energy module is coupled to each of the split secondary center taps. A pair of spark plugs is coupled to one of the secondary windings and another pair of spark plugs is coupled to the other secondary winding.

Spark monitor device for current collectors

Abstract: A spark monitor device arranged to detect a high frequency noise due to a spark generated in a current collector of a rotary electric machine and monitor a state of spark generation on the basis of the product of a peak value of the high frequency noise exceeding a given set value and a time interval during which the peak value exceeds the set value.

Multi-gap spark ignition system

Abstract: A multi-gap spark ignition system is disclosed. The system comprises a plurality of spark gaps which are formed in series. The length of the spark gaps increases from the high voltage power source side towards the earth side. According to the present invention, necessary voltage to be applied to the spark ignition system can be decreased.

Ignition system tester

Abstract: This specification discloses testing vehicle primary ignition systems by taking the integral of the primary spark plug firing voltage versus time over a time period when the spark should occur. To determine when an integration output should be evaluated, a phase locked loop circuit is used to predict the occurrence of an ignition firing pulse. To compensate for changes in engine speed and yet disregard extraneous spark plug firings, the phase locked loop circuit contains two loop filters having different response times which are automatically selected to minimize response to erroneous or missing spark plug firings and maximize response to actual engine RPM changes.

Ignition system spark timing control during engine cranking

Abstract: A method and apparatus for controlling ignition system spark timing. It is detected whether the engine is under cranking or not. Means are included to provide a spark-advance characteristics when the engine is under cranking, which is separate from a spark-advance characteristic provided for the remaining engine operating conditions.

Tip-in knock eliminating spark timing control

Abstract: D-5,426 TIP IN KNOCK ELIMINATING SPARK TIMING CONTROL Abstract of the Disclosure A spark timing control system for an internal combustion engine is responsive to a changing engine operating parameter signalling an engine tip-in event to retard spark timing by an amount sufficient to eliminate tip-in knock and for a predetermined time period ending 175 -300 milliseconds after initiation of the tip-in event, so that no perceptible engine performance loss results.

Device for controlling spark timing and fuel injection of an internal combustion engine

Abstract: A knock control device of an internal combustion engine incorporated with a device for controlling the spark timing and the fuel injection. The device for controlling the spark timing and the fuel injection comprises an electronic control unit. A knock sensor is mounted on the cylinder block for sensing knocking. When the output of the knock sensor is above a first predetermined level, retardation of spark timing is caused. When the output of the knock sensor is above a second level above the first level, retardation of spark timing is caused and the amount of fuel to be injected is increased.

Computer Control of Basic and Applied Experiments in Spark Emission Spectroscopy

Abstract: A hardware system is described which provides for software-independent timing of events necessary for the smooth operation of an adjustable waveform spark source. Illustrative cases are given showing the extension of this system into a single-channel spectrometer and a complex schlieren photography experiment. Software outlines are also provided. The use of an optical coupler and a fiber optic are shown to improve system performance greatly in high radio frequency interference environments.

Method of controlling the performance of a spark ignited automobile internal combustion engine

Abstract: This specification discloses a method for adaptively controlling engine calibration control values. The strategy includes the steps of (1) predicting a driving pattern based on analysis of recent past driving patterns and (2) selecting engine control values appropriate for the predicted driving pattern and a desired emission constraint. The adaptive strategy adjusts spark timing and magnitude of EGR as a function of engine energy usage per distance traveled while maintaining feedgas emissions at a constant level over a wide variety of driving patterns including urban, suburban and highway. A plurality of driving cycle segments are analyzed to generate a table of engine calibration control values for the adaptive spark and EGR control strategy. This adaptive strategy has fuel consumption characteristics which are most advantageous at the most constrained feedgas levels. Drivability can be enhanced because of the greater calibration flexibility inherent to the adaptive technique.

Internal combustion engine ignition system with improvement

Abstract: In the combination of an internal combustion engine which has an electronic ignition system that develops a continuous high-voltage AC type spark signal, there is an improvement which provides for controlling the duration of the spark signals. Such duration control acts to vary the crank angle degrees that are encompassed by the spark duration, which variation is in accordance with an engine parameter. The parameter may be engine load, and the variation control saves spark energy consumed while extending the life of the spark plugs.

Ignition advance circuit with sensor inputs

Abstract: Sensor inputs from an engine load sensor (32) alter the frequency of a pulse providing circuit (30), the output of which adds counts to those counts provided as a function of engine velocity. The total number of counts is used for determining the instantaneous advance angle in a distributorless ignition system. Information derived from two sets of sensor (14, 16) output pulses relating to crankshaft position is used in determining the proper cylinder to be fired, the spark time and the dwell. The spark is enabled only after the crankshaft position is known, and noise, including the spark itself, is prevented from interfering with the system operation. The circuit determines which cylinder is to be fired and continually updates the determination so that the circuit recovers immediately from any false detect and responds to any change of engine condition.

Spark timing control system

Abstract: A spark timing control system for reducing engine noise in an internal combustion engine utilizing a sensor for detector for detecting engine vibration, a filtering device receiving the output of the sensor and passing frequency components within a range of 500 to 2000 Hz, and a generating circuit responsive to the passed frequency components for generating an output signal when the level of the passed frequency outputs exceeds a reference value. Spark timing is retarded when the output signal is received from the generating circuit thereby reducing engine noise.

Fuel injection method of internal combustion engine

Abstract: PURPOSE:To smoothly start an internal combustion engine, by reading a quantity of fuel injection, suitable for starting actuated a starter, and a quantity of fuel injection, suitable for operation stopped the starter, from a memory and performing fuel injection. CONSTITUTION:A throttle valve 3 and fuel injection valve 4 are provided in an intake route 2 of a spark ignition internal combustion engine 1. An opening of the throttle valve 3 is detected by a detector 5, while a R.P.M. is detected by a detector 6. When a starter 7 is actuated, a quantity of fuel injection suitable for starting operation is read from a memory 10 equipped in a processor 9 to perform fuel injection from the fuel injection valve 4. Also when the internal combustion engine 1 is operated in a state stopped the starter 7, an optimum quantity of fuel injection is injected in a same manner. In this way, the most suitable quantity of fuel can be injected at starting of the engine, and the internal combustion engine 1 can be smoothly started.

Method of and a device for adjusting a high-speed photographic arrangement

Abstract: A high-speed photographic device including a spark-discharge flash light unit according to Cranz-Schardin slow-motion camera having an optical projecting and deflecting system for reproducing individual consecutively ignited spark discharges on an image plane is to be adjusted for optimum operation. The device for adjusting the optical system includes a pulse generator connected to ignition control means for the spark gaps and operating at a repetition rate to ignite simultaneously the spark gaps so as to produce a flicker-free test image of all spark discharges on the image plane.

Collision experiment on highly ionized ions using vacuum spark source

Abstract: Abstract Cross sections for one-electron capture by Fe 6+ in H 2 have been measured at collision energies below 10 keV by using a vacuum spark ion source. It is found that the cross sections are little dependent on the collision energy and their values are around 6×10 −15 cm 2 . This ion source, which has no electrode for ion extraction, can produce multicharged ions from several hundreds of eV to several tens of keV and the maximum charge state of 16 in Fe at the discharge energy of 125 J (capacitor: 10.4 μF, operation voltage: 5 kV). With an ion selection system of 2.7 m time-of-flight and a 127° electrostatic analyzer of 1% resolving power, 10 2 −10 3 ions/pulse are obtained. Because of the poor reproducibility of the discharge, ions which have captured an electron from the target molecule and ions which have not reacted, are measured simultaneously during one discharge with a microchannel plate which has two collectors at the back.

Spark ignition IC-engine - has pump directing part of mixture via inlet port at sparking plug to produce swirl in combustion chamber

Abstract: The charge feed is intended for producing swirl of the fuel-air micture in the combustion chamber (5) of a spark ignition (18) engine (1). It comprises an auxiliary mixture feed (14,15) containing a pump (13) and lines (15) whose outlets (17) are arranged in the inlet ducts (6) immediately upstream of the inlet valves (7) of the respective cylinders (2). These outlets are directed at the sparking plugs (18). The inlet (16) to the pump may be arranged in the intake (8) upstream or downstream of the throttle (11).

Calculation of Discharge Current Waveforms in High Voltage Spark Sources. II. Extensions and Limitations of Closed-form Solution

Abstract: Simulation of gap breakdown and dynamic impedance effects in high voltage spark sources is performed using an algebraically exact solution to an approximate model of source behavior. The importance of diode shunt capacitance in determining gap breakdown behavior is shown. Limitations in generality and implicit use of numerical methods in dynamic situations lead naturally to consideration of numerical integration methods. Comparisons to hardware sources are made.

Automatic spark duration controller for IC engine - has electronic processor acting on engine characteristic to switch thyristor across primary of ignition coil to stop spark

Abstract: The duration of the spark in a spark ignition internal combustion engine is controlled in relation to some engine characteristic, for example, engine speed, by the switching of a thyristor across the primary winding of the ignition coil. The spark is established by mechanical contacts opened and closed by a cam driven by the engine. Falling current in the ignition coil generates the spark which is distributed to the spark plugs. An electronic circuit processes at least one engine characteristic and generates a negative going potential at the cathode of a thyristor which is connected by its gate to the supply side of the coil and its anode to the contact breaker side of the coil. The thyristor dumps the current from the ignition coil, cutting off the spark.