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| Number | Title | Issue Date |
| 5349299 | Fuel supply misfire-detecting system for internal combustion engines A misfire-detecting system detects a misfire occurring in an internal combustion engine. A value of sparking voltage for discharging a spark plug of the engine is detected. A differentiating circuit differentiates the detected value of the sparking voltag... | 09/20/1994 |
| 5294887 | Device for generating a trigger signal from ignition pulses in an ignition system A device for generating a trigger signal from ignition pulses of an ignition system, in which each one of the ignition pulses occurring in the ignition system is represented regardless of whether the ignition process is suppressed or not. The device can b... | 03/15/1994 |
| 5283527 | Methods and apparatus for detecting short circuited secondary coil winding via monitoring primary coil winding Methods and apparatus for detecting low impedance short circuits in a secondary winding circuit of a coil of a distributorless ignition system (DIS) by analyzing spark discharge signals on a primary winding of the ignition coil. In one embodiment, the dur... | 02/01/1994 |
| 5196844 | Method and apparatus for detecting reference rotational angle for each cylinder in multiple-cylinder internal combustion engine Disclosed is an apparatus for detecting the reference rotational angle for each cylinder in a multiple-cylinder internal combustion engine, in which a reference pulse signal is output at a position of a predetermined rotational angle of the engine at a sp... | 03/23/1993 |
| 5180984 | Ion current sensing device for an internal combustion engine with spurious voltage preventing filter An ion current sensing device for an internal combustion engine is able to accurately sense an ion current generated between electrodes of a spark plug during combustion of a mixture even when the electrodes have been smeared by carbon or other combustion... | 01/19/1993 |
| 5156127 | Method for optimizing plug firing time and providing diagnostic capability in an automotive ignition system The firing time of a spark plug (22) is optimized by measuring its actual firing time (as by detecting the rise of current in the secondary winding (44) of an ignition coil (24)), comparing the actual firing time to the desired firing time, and advancing ... | 10/20/1992 |
| 5132625 | Distributorless ignition adapter for diagnostic oscilloscopes An ignition adapter for DIS four stroke engines provides conventional voltage waveforms for a diagnostic oscilloscope. Spark plug leads from a DIS four stroke engine are grouped together depending on their respective firing polarity. A first signal pickup... | 07/21/1992 |
| 5105155 | Apparatus for setting timing of internal combustion engines Apparatus for setting the spark timing of an internal combustion engine comprising a pointer element removably attachable to rotor of a distributor with its cap removed and a scale element removably attachable to the exterior of the distributor housing in... | 04/14/1992 |
| 4950996 | Method of and apparatus for adjusting ignition timing by rotating the crankshaft with the coil and spark plug terminals disconnected from the ignition circuit Ignition timing of an internal combustion engine of an automotive vehicle is automatically adjusted by idling the engine with a distributor whose coil terminal and spark plug terminals are disconnected from ignition circuit and detecting an spurious ignit... | 08/21/1990 |
| 4943776 | Device and a method for the detection of pinking in Otto engines The signal provided by an accelerometric sensor (S) connected to the engine is monitored in two frequency bands (f1, f2) in which peaks indicative of the presence of pinking (knocking) may appear. The intensity of the signal detected in the second band (f... | 07/24/1990 |
| 4942362 | Apparatus for testing ignition systems An analyzation apparatus for ignition systems that has a pulse detector circuit that generates and converts an AC signal into a DC signal, filters unwanted signals and allows the user to adjust the amplitude of the signal to accommodate differing ignition... | 07/17/1990 |
| 4918980 | Diesel engine timing apparatus and method A diesel engine timing apparatus comprising a luminosity probe including a photocell which in response to light generated by combustion of fuel in a selected chamber of the diesel engine generates an on or off signal depending on the respective presence o... | 04/24/1990 |
| 4578755 | Microprocessor controlled timing/tachometer apparatus The apparatus comprises a combustion sensor to sense the combustion event in an engine, and a magnetic sensor to sense top dead center. Electrical signals from the sensors are converted to two trains of pulses which are applied to a microprocessor. Under ... | 03/25/1986 |
| 4489498 | Bracket qualifier device The bracket qualifier device comprises a body and first and second legs carried thereby. The first leg is adapted to be inserted into the magnetic probe receptacle of a combustion engine. The second leg carries a foot which mates with a corresponding shap... | 12/25/1984 |
| 4472779 | Engine timing apparatus for use in testing Engine timing apparatus includes a timing light, cylinder clock signal circuitry, a cylinder counter, a cylinder comparator, first, second and third timers, a trigger pulse generator, operator control buttons, and a computer. The first timer measures a fi... | 09/18/1984 |
| 4459544 | Device for detecting actual ignition in a simultaneous ignition engine An actual ignition timing detecting device for use with a simultaneous ignition engine in which two cylinders are actually ignited in an alternate manner by simultaneously applying an ignition pulses generated in inverse polarities between the two termina... | 07/10/1984 |
| 4447880 | System for detecting the transient state of engine operation A system for electronically detecting the transient state of engine operation of an internal combustion engine having a spark ignition system. A measuring circuit counts pulses having the pulse separation of the ignition timing of the spark ignition syste... | 05/08/1984 |
| 4413508 | Adjusting system for crank angle sensor An adjusting system for crank angle sensor signal comprises a crank angle sensor, a timing detector and an adjusting unit including an output control device. The crank angle sensor is associated with an engine crankshaft and produces first and second sign... | 11/08/1983 |
| 4331029 | Method and apparatus for measurement of engine ignition timing Method and apparatus for measuring ignition timing of an internal combustion engine wherein angular position of the engine crankshaft is monitored while microwave radiation is injected into a selected engine cylinder. An angular position of the engine cra... | 05/25/1982 |
| 4312043 | Apparatus and method for determining the integrity of a distributor for an engine An apparatus and method for detecting a defective distributor is shown. The apparatus includes an input system providing the time of each cylinder firing after an initial firing of cylinder #1. A processor then determines the deviation between the actual ... | 01/19/1982 |
| 4296471 | Device for initiating in particular the ignition of an internal combustion engine A device is disclosed having means for measuring the speed of an engine, the means including a first sensor, a second sensor offset from the first sensor by an angle , and a reference element that moves in front of the sensors. The reference elemen... | 10/20/1981 |
| 4230969 | Ignition timing testing device Device for stroboscopically testing the ignition timing of an internal-combustion motor, comprising a flat elongate casing and a flash lamp and a trigger circuit for the flash lamp arranged in the casing, which trigger circuit is adapted to be controlled ... | 10/28/1980 |
| 4177781 | Electromechanical engine timing device An electromechanical engine timing device for installation in an ignition system distributor having one or more breaker points which provides a visual indication of maladjustments and malfunctions, permitting easy detection and correction. The system is c... | 12/11/1979 |
| 4146833 | Spark advance tester This specification discloses a timing control circuit for a strobe lamp used in adjusting the ignition timing of an internal combustion engine. The control circuit includes an ignition firing detector with improved noise immunity, and a calibrated control... | 03/27/1979 |
| 4117395 | Digital stroboscope-tachometer A stroboscope which generates high intensity light flashes may be manually adjusted to the speed of a rotating object and provides an indication of the speed of the rotating object in revolutions per minute. Connection of an external synchronizing unit in... | 09/26/1978 |
| 4106461 | Reflective ignition timing process The subject of this disclosure is a process through which the timing function is performed for electronic ignition systems. Being specifically proposed for motorcycle use, it is a unique process intended to eliminate the shortcomings of those techniques i... | 08/15/1978 |
| 4103659 | Ignition system An improvement in the electrical circuitry of ignition systems for internal combustion engines wherein a new ignition pulse is provided from the surge voltage developed in the ignition coil of the ignition system. The new ignition pulse output signal is g... | 08/01/1978 |
| 4089316 | Adjustable rotary position sensor for electronic spark timing control An improved adjustable rotary position sensor assembly is disclosed which is adaptable for sensing the rotational position of a body being synchronously rotated by an engine crankshaft and producing spark timing signals for the engine in response to the r... | 05/16/1978 |
| 4072891 | Timing display ignition plate assembly A stroboscopic timing light is mounted on the ignition point carrying plate of an internal combustion engine and, when actuated, fires with a selected spark plug operating pulse, thereby illuminating marks located on an adjacent member rotating with the p... | 02/07/1978 |
| 4035619 | Analog computer, particularly for an ignition system for internal combustion engine An analog computer for controlling the ignition system of an internal combustion engine. A continuous signal is synthesized corresponding to the ignition advance angle as a function of the engine speed of rotation and of air intake pressure. This signal i... | 07/12/1977 |
| 4008431 | Automobile engine tuning scope A scope for tuning an automobile engine which may be remotely located from the engine, in use. The scope is connected to an external flexible shaft fitted with a socket for joining to an engine shaft stud, with a rotatable disc in the scope linked to the ... | 02/15/1977 |
| 3992930 | Engine cylinder identification A number one cylinder ignition signal from an engine is utilized to initiate counting of low coil signals from the same engine, and coincidence of a count equal to the number of cylinders in the engine and a subsequent number one cylinder ignition signal ... | 11/23/1976 |
| 3978720 | Combustion detector for internal combustion engines Detection of the combustion within a cylinder of an internal combustion engine by sensing the visible and/or infra-red radiation emitted on combustion by means of a quartz window in the cylinder wall or head, a fiber optic light guide and a photo-transist... | 09/07/1976 |
