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6940284 |
Efficient diagnosis of faulty distributorless and hybrid ignition systems
A method for efficiently determining whether a distributorless or hybrid ignition system is the origin of engine problems by consecutively disconnecting and reconnecting the primary connector from...
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6834540 |
Engine cylinder event fill-in (phylinder)
A fill-in apparatus for an engine that injects a pseudo cylinder signal when an ignition event is missing from a cylinder. The pseudo cylinder signal is injected if no ignition event occurs at an...
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6667622 |
Vehicle engine pulse stream analyzer
A low cost, easy to use, hand held pulse stream analyzer is designed to show, after an engine stops operating, which pulse stream, ignition or injection, quit first. Additionally, the analyzer is...
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6662639 |
Secondary ignition pickup and method
A method and apparatus for receiving and relaying signals from an ignition coil. A secondary pickup is constructed and arranged to mate with the ignition coil and to receive the secondary voltage...
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6487480 |
Method of calibrating of a system which operates depending on a sensor in a motor vehicle
A calibration of a system which operates in dependence on a sensor in a motor vehicle includes testing, with the use of sensors available in a motor vehicle or with the use of data representative...
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6439040 |
Device for analyzing exhaust emissions from motor vehicles
This description refers to a device for analyzing the most important environmentally relevant substances, such as CO, HC and NO, that are present in vehicle exhaust emissions. It is based on the...
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6439039 |
Method to verify cold start spark retard
Methods of utilizing engine 15 crankshaft acceleration 17 to monitor cold start spark retard are presented. A first method utilizes a variance in a crankshaft acceleration based deviation...
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6415657 |
Switch monitoring system
A switch monitoring system for measuring closure time of a switch in a vehicle when the vehicle ignition switch is off. The switch monitoring system includes an application specific integrated...
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6359439 |
Compression sense ignition system with fault mode detection and having improved capacitive sensing
A compression sense ignition system includes a sensing capacitor having a conductive sensing element disposed in proximity to the secondary winding leads of a first and a second ignition coil for...
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6314803 |
Method for surveying the operating conditions of an internal combustion engine with spark ignition
A method for surveying the operating conditions of an internal combustion engine with spark ignition, wherein in one and the same engine cycle a plurality of primary charging cycle are generated...
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6279391 |
Electrical engine firing pulse converter
Systems are provided which retard rotation of a driveline at times associated with an engine firing pulse from an engine driving the driveline to reduce torque peaks. In one system, a control...
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6188224 |
Process for the diagnosis of an ignition device of an internal combustion engine
The diagnosis of an open-circuit fault or of a short-circuit in an ignition system is effected by performing asynchronous periodic extraction of samples of current in a switch. A check is made to...
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6176124 |
Spark plug connector checking apparatus
A bushing holder unit includes a cap holder unit including a cap holder in which a cap portion of a spark plug connector is fit, and a magnetizable portion by which the cap holder unit may be...
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6029631 |
Method of identifying the combustion chamber of a combustion engine that is in the compression stroke, and a method and device for starting a combustion engine
A combustion engine comprises at least two combustion chambers and an ignition system having a spark device (11, 13) forming an electrode gap and a charging member (20) for accumulating the...
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5978727 |
Method and apparatus for engine analysis by waveform comparison
A method and apparatus for analysis of engines analyzes digitized input signals from, for example, engine injectors and compares this digital data with the corresponding values of a digitized...
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5935187 |
Engine analyzer with pattern library linked to vehicle ID and display scope configuration
An engine analyzer having a dual-trace digital oscilloscope includes a memory for storing a library of digitized waveform patterns, the patterns being stored together with identifying data for each...
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5933009 |
Spark plug ignited engine analyzing device and method
An engine analyzing device for an internal combustion engine including a spark generator and means for testing the voltage of the sparks generated for a diagnosis of engine performance, the testing...
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5872312 |
Method for recognizing defective ignition or injection system in internal combustion engines
A method of detecting defective ignition or fuel injection system of an internal combustion engine with several cylinders and at least two spark plugs or two fuel injection devices per cylinder...
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5832908 |
Cylinder-discriminating device for internal combustion engines
A cylinder-discriminating device for an internal combustion engine is provided. A reference timing signal is generated whenever the engine rotates through a predetermined rotational angle. A...
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5778328 |
Engine analyzer with single-head ignition scope
An engine analyzer with a digital oscilloscope display includes a processor for controlling the acquisition and display of a high-voltage secondary ignition signal waveform with the use of only a...
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5735254 |
Circuit for detecting an overvoltage on a switched inductive load
A circuit for use with an ignition system to enable detection of an overvoltage condition in the primary winding of an ignition coil caused by opening of a power switch connected to the primary...
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5719330 |
Automotive igniton module diagnostic
Ignition modules for directly applying spark plug drive signals to spark plug pairs disposed in engine cylinders are diagnosed by issuing drive signals to the ignition modules and then monitoring...
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5714679 |
Portable apparatus for testing an internal combustion engine
An apparatus for testing an internal combustion engine is disclosed. The apparatus comprises a probe for electrical connection to at least one spark plug wire of the engine being tested. A peak...
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5696676 |
Self-diagnosis apparatus for vehicles
A control unit of a self-diagnosis apparatus for a vehicle includes a CPU and a non-volatile RAM, wherein the CPU has a function of detecting abnormalities occurring in vehicle-mounted devices and...
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5668311 |
Cylinder compression detection
A compression detection apparatus for determining which one of a pair of phase-opposed cylinders is under compression has a capacitive probe coupled to both ends of the secondary winding of an...
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5656770 |
Method for testing a spark-ignited internal combustion engine
A method for testing a spark-ignited internal combustion engine is proposed, wherein a pulse-shaped signal derived from the ignition system is made available which signal allocates a pulse (34,...
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5652381 |
Ignition system test instrument
An ignition system test instrument used on spark ignited engines includes a housing having a spark chamber. A sleeve with an open and a closed end is slidably mounted over the housing. A...
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5641898 |
Distributorless ignition system ignition module tester
An ignition module tester is provided for testing ignition modules associated with motor vehicles. The ignition module tester includes an oscillator for simulating an output signal from the pick-up...
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5633591 |
Apparatus and method for measuring the breakdown voltage between two electrodes separated by a dielectric
An apparatus and method for measuring a breakdown voltage between two electrodes separated by a dielectric. The output of a sensor perceiving the voltage across the two electrodes is transferred to...
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5567873 |
Misfire-determining controller for internal combustion engine
A misfire-determining controller comprises a control which is provided with the added function of controlling so as to cease misfire monitoring when at least one misfire detection-ceasing...
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5495757 |
Method and device for detection of ignition failures in an internal combustion engine cylinder
A second spark is triggered, after a first ignition spark. The initiation overvoltage of the second spark is detected. The overvoltage and the occurrence or the non-occurrence of a failure of...
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5426369 |
Spark plug testing apparatus
A new and improved spark plug testing apparatus is in the form of an electrically conductive, metallic spring clip and includes a pair of first electrically conductive contact portions for...
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5410253 |
Method of indicating combustion in an internal combustion engine
Absolute engine position sensing is provided by monitoring the temporal relationship of energization of multiple spark plugs sharing a common source of drive energy in a direct ignition...
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5396427 |
Method and apparatus for determining relative contributions of individual cylinders of internal combustion engine
A linearly moving external part of a multi-cylinder internal combustion engine is contacted with a hand-held contact tachometer for producing a waveform signal which, along with a signal responsive...
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5387870 |
Method and apparatus for feature extraction from internal combustion engine ignition waveforms
The invention is a method and apparatus for extracting and analyzing features in real time from primary or secondary ignition waveforms, including engine probes, sampling device, and a processor...
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5334938 |
Method of monitoring an internal combustion engine ignition system by measuring spark duration or voltage and distinction between isolated errors and recurrent errors
Monitoring apparatus is provided for the ignition system of an internal combustion engine such as is provided in a motor vehicle, which is capable of detecting a variety of malfunctions of ignition...
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5317268 |
Sparking voltage detecting device for internal combustion engines
A sparking voltage detecting device for an internal combustion engine having an ignition system having at least one secondary side high-tension cord, is mounted on the secondary side high-tension...
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5201293 |
Method of monitoring the operation of an internal combustion engine
A method of monitoring the operation of an internal combustion engine, such as is usable in a motor vehicle, combines the recognition of ignition failures with recognition of combustion failures....
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5198980 |
Portable testing apparatus for airplane engines
A self-powered and self-contained portable testing apparatus for monitoring critical operating parameters of an aircraft reciprocating engine. The portable testing apparatus is typically used for...
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5194813 |
Spark ignition analyzer
A spark ignition analyzer comprising a probe having a first and second pick-up responsive to a voltage from an ignition wire, a high tension detector for detecting an absolute voltage increase from...
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5178001 |
Ignition apparatus for an internal combustion engine
An ignition apparatus for an internal combustion engine can prevent malfunctions due to noise induced by a high ignition voltage which is developed by an ignition coil upon ignition. Generation of...
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5170125 |
Tester for the ignition module of a vehicle
A tester is adapted to plug in or otherwise connect to an ignition control module under test. The tester includes an LED in series with a resistor. The series circuit is connected between a battery...
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5160892 |
Engine analyzer waveform display with a buffer region
An engine analyzer for an internal combustion engine includes an analog-to-digital (A/D) converter which digitizes an analog input waveform representing, for example, a secondary or primary voltage...
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5068613 |
Method and apparatus for generating display waveforms im wasted spark ignition systems
A method and apparatus of developing a stabilized power firing event signal for a cylinder in a wasted spark ignition system having pairs of complementarily connected cylinders, each with a spark...
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5065729 |
Cylinder recognition apparatus for a distributorless ignition system
A distributorless ignition system using a dual-spark ignition coil generates a signal indicative of which of the two cylinders associated with the dual-spark coil is operating in its power stroke...
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5001432 |
Ignition test probe
A self-contained handheld peak ignition breakdown voltage probe locates faulty sparkplugs in an internal combustion engine. The probe has a novel dual-polarity detection system suitable for all...
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4969443 |
Open secondary detection via reverse circuit sensing
An open secondary coil of an ignition coil is detected by the use of a reverse current in the primary of the ignition coil to indicate the occurrence of an open secondary coil.
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4899579 |
Onboard diagnostic system of vehicle ignition system
A method of operating an onboard diagnostic system for a distributorless ignition system of an internal combustion engine includes detecting the time of occurrence of a spark plug firing and...
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4825167 |
Spark plug testing under dynamic load
A method of testing spark plugs in an engine is described. The engine is driven by its starter motor or other motor while ignition voltage is applied, the throttle is open and the fuel is cut off....
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4812979 |
Method and apparatus for analyzing the performance of the electronic ignition of an internal combustion engine
A method and apparatus for the operational state analysis of internal combustion engines with electrical ignition systems wherein, following any deviation from normal engine operation, the cause of...
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