Abstract: Methods and systems are provided for estimating an actual compression ratio of an engine cylinder based on the electric current applied to an actuator of the associated variable compression ratio mechanism. The compression ratio is estimated as a function of both a value and a location, relative to cylinder piston position, of a peak holding current applied by an electric motor on the actuator to maintain the actuator at a commanded compression ratio setting. In this way, the vehicle control system may more accurately infer the current actual compression ratio of each cylinder.

Abstract: An interconnection unit includes a first connector configured to be coupled to an electronic device. There is a second connector configured to be coupled to a power station and to provide a path to the electronic device via the first connector. There is a low pass filter coupled between the first connector and the second connector and configured to allow the electronic device to receive power from the power station while maintaining data security of the electronic device.

Abstract: A turbine engine ignition system comprising a spark plug having excitation and return terminals, and a spark plug exciter connected to the excitation terminal. The return terminal is connected to an equipotential reference-forming structure, the exciter device is connected to a command line for a signal to supply an excitation signal to the spark plug. The ignition system comprises a control device comprising current and voltage sensors, a first voltage comparator, a second current comparator, and a microcontroller receiving output from the two comparators. The first comparator compares the voltage sensor signal to a first reference value and the second comparator compares the current sensor signal to a second reference value. The microcontroller generates a signal indicating a malfunction of the ignition system if the current sensor signal is lower than the second reference value while the voltage sensor signal is higher than the first reference value.

Abstract: A system, includes: a distributed cache that stores state information for a plurality of configuration items (CIs). Management, instrumentation, and discovery (MID) servers form a cluster, each of the MID servers including one or more processors that receive, from the distributed cache, a subset of the state information associated with assigned CIs and perform a statistical analysis on the subset of the state information.

Abstract: A method for monitoring an ignition system including a spark plug of an internal combustion engine is disclosed. The method comprises determining an operation value associated with an electrical parameter indicative of an operation of the ignition system during actuation of the spark plug. The method further comprises determining at least one parameter indicative of a current engine operation condition of the internal combustion engine, and determining a current spark plug state of the spark plug based on the at least one engine parameter and the operation value associated with the electrical parameter of the ignition system.

Abstract: An engine ignition system for a spark-ignited engine includes a sparkplug and a control system having primary ignition circuitry, secondary ignition circuitry coupled with electrodes of the sparkplug, and sensing circuitry. A control device determines a timing of spark production based on a pattern of varying of an electrical property in the primary ignition circuitry. An inflection point in a sensed current signal may be detected to determine the timing.

Abstract: Methods and systems for monitoring a switch included in a vehicle. One method includes a method of monitoring a switch included in a vehicle. The method includes obtaining a current vehicle speed, and dynamically, by a controller, generating a duration for detecting a stuck state of the switch based on at least the current vehicle speed, detecting, by the controller, a duration of a high signal received from the switch. The method also includes comparing, by the controller, the duration of the high signal to the generated duration, and detecting, by the controller a stuck state of the switch when the duration of the high signal satisfies the generated duration.

Abstract: A sensor unit (2) for a motor vehicle or trailer is disclosed. The sensor unit comprises a sensor measuring arrangement (16) for sensing at least one physical variable, a sensor housing (12) partly or fully enclosing the sensor measuring arrangement (16) and at least two connecting lines (18). The sensor unit (2) with the sensor housing (12) is electrically connectable to a conductive part of the motor vehicle or trailer and the sensor measuring arrangement (16) is connectable to an analyzer (6) via the connecting lines (18). Related methods, a sensing and analysis device, and motor vehicles or trailers including the same are also disclosed.

Abstract: The disclosure relates to an apparatus and a method for driving a solenoid valve. The apparatus comprises a PWM apparatus, an evaluation and control unit, and a current measuring apparatus The evaluation and control unit is configured to: in a test operation, generate and emit test PWM signals having test duty ratios, the test PWM signals inducing test currents through a magnet assembly of the solenoid valve that are below a response threshold that triggers a switching process of the solenoid valve; derive presently prevailing ambient conditions of the test operation from the test PWM signals and the induced test currents; and in a normal operation generate and emit a PWM signal based on the presently prevailing ambient conditions of the test operation, the PWM signal inducing a current that is above the response threshold and switches the solenoid valve.

Abstract: A powertrain assembly includes an engine having at least one cylinder and at least one electric machine operatively connected to the engine. A motor speed sensor is operatively connected to and configured to obtain motor speed data of the electric machine. A controller is operatively connected to the motor speed sensor. The controller including a processor and tangible, non-transitory memory on which is recorded instructions for executing a method for detection of firing irregularities in the at least one cylinder. Execution of the instructions by the processor causes the controller to obtain the motor speed data at a predefined time interval from the motor speed sensor, until a predefined time window is reached. A fast Fourier transform of the motor speed data during the predefined time window is obtained. The controller is configured to control the engine based at least partially on the fast Fourier Transform.

Abstract: An ignition apparatus for an internal combustion engine is provided which includes a state-of-discharge determiner working to determine whether a center and a ground electrode of a spark plug are electrically conducting with each other or insulated from each other. When the center and ground electrodes are determined to be conducted with each other, the ignition apparatus alters controlled conditions of a high-frequency power supply which supplies a high-frequency power to the spark plug so as to decrease an average of a primary voltage outputted from the high-frequency power supply to the spark plug, thereby reducing an actual current flowing between the center and ground electrodes of the spark plug. This eliminates the risk of mechanical wear of the center and ground electrodes which usually arises from the flow of high current between the center and ground electrodes, thus resulting in an increase in service life of the spark plug.

Abstract: A method of operating a predetermined electronic control unit is provided for a vehicle comprising: a vehicle network bus and one or more electronic control units coupled to the bus. The method comprises: providing the predetermined electronic control unit of with a processor, a memory, an interface to the vehicle network bus, and an intrusion detection program. The method further comprises: utilizing the predetermined electronic control unit to monitor data on the vehicle network bus; executing the intrusion detection program to detect one or more anomalies in the monitored data; and utilizing the predetermined electronic control unit to generate an alert upon detection of one or more anomalies.

Abstract: An electronic control unit is provided for installation in a vehicle. The electronic control unit is operable to provide intrusion detection for the vehicle electronic systems. The electronic control unit comprises: a processor; a memory; and an interface to a vehicle network bus coupled to vehicle electronic control units. The processor utilizes the interface to monitor data on the vehicle network bus. An intrusion detection program is stored in the memory and is executable by the processor. The processor utilizes the intrusion detection program to detect one or more anomalies in the monitored data. The electronic control unit generates an alert upon detection of one or more anomalies.

Abstract: An embodiment is provided of a mobile router for installation in a vehicle comprising a vehicle network bus coupled to a plurality of electronic control units. The mobile router comprises: a processor; a memory comprising a plurality of programs; a wireless wide area network interface; a wireless local area network interface; and an interface to the vehicle network bus coupled to vehicle electronic control units. The processor utilizes the interface to monitor data on the vehicle network bus. The plurality of programs comprises an intrusion detection program executable by the processor to detect one or more anomalies in the monitored data; and to generate an alert upon detection of one or more anomalies.

Abstract: A method of operating a mobile router installed in a vehicle is provided. The vehicle comprises a vehicle network bus coupled to a plurality of electronic control units. The mobile router comprises: a wireless wide area network interface a wireless local area network interface; an interface to the vehicle network bus; a processor; and a memory comprising a plurality of programs. The plurality of programs comprises an intrusion detection program executable by the processor. The method of operating a mobile router comprises: monitoring data on the vehicle network bus; utilizing the intrusion detection program to detect one or more anomalies in the monitored data; and generating an alert upon detection of one or more of anomalies.

Abstract: In an embodiment of a vehicle, the vehicle comprises: a vehicle network bus; one or more electronic control units coupled to the bus. One electronic control unit comprises: a processor; a memory; an interface to the vehicle network bus; and an intrusion detection program stored in the memory and executable by the processor. The processor utilizes the interface to monitor data on the vehicle network bus and utilizes the intrusion detection program to detect one or more anomalies in the monitored data. The electronic control unit generates an alert upon detection of one or more anomalies.

Abstract: A high-frequency discharge ignition device includes a current supply device which supplies an AC current to a spark discharge path formed in a gap of an ignition plug, a control device which controls the operation of the current supply device, and a voltage detection device which outputs a signal of a section where a magnetic induction voltage of a primary coil generated after a switch element of an ignition coil device is placed in a shutoff state exceeds a predetermined voltage, and the control device determines the timing when the spark discharge path has been formed in the gap of the ignition plug according to an output signal of the voltage detection device and operates the current supply device based on the timing when the spark discharge path has been formed in the gap of the ignition plug to supply the AC current to the spark discharge path.

Abstract: An embodiment is provided of a mobile router for installation in a vehicle comprising a vehicle network bus coupled to a plurality of electronic control units. The mobile router comprises: a processor; a memory comprising a plurality of programs; a wireless wide area network interface; a wireless local area network interface; and an interface to the vehicle network bus coupled to vehicle electronic control units. The processor utilizes the interface to monitor data on the vehicle network bus. The plurality of programs comprises an intrusion detection program executable by the processor to detect one or more anomalies in the monitored data; and to generate an alert upon detection of one or more anomalies.

Abstract: This invention encompasses embodiments for multi-modal integrated simultaneous measurement of various aspects of fluids contained in circulating systems such as automotive reciprocating engines and vehicle transmissions. These circulating systems perform constant internal lubrication, and heat and contaminant removal to protect the internal moving parts from the inherent friction and damage in normal operation. Most commonly this is achieved with fluids based on hydrocarbon and/or related synthetics, which, over time, can lose their protective properties, and vary in their performance or breakdown/decay due to internal and external events. Several components within the lubricant fluid can be measured and can provide insight into the efficacy of the system to perform its designed mission.

Abstract: Various methods and arrangements for determining a combustion control parameter for a working chamber in an engine are described. In one aspect, an engine controller includes a firing counter that stores a firing history for the working chamber. A combustion control module is used to determine a combustion control parameter, which is used to help manage combustion in the working chamber. The combustion control parameter is determined based at least in part on the firing history.

Abstract: This invention encompasses embodiments for multi-modal integrated simultaneous measurement of various aspects of fluids contained in circulating systems such as automotive reciprocating engines and vehicle transmissions. These circulating systems perform constant internal lubrication, and heat and contaminant removal to protect the internal moving parts from the inherent friction and damage in normal operation. Most commonly this is achieved with fluids based on hydrocarbon and/or related synthetics, which, over time, can lose their protective properties, and vary in their performance or breakdown/decay due to internal and external events. Several components within the lubricant fluid can be measured and can provide insight into the efficacy of the system to perform its designed mission.

Abstract: A device and system for controlling a light source. The device has a positive terminal and a negative terminal for setting the high-end trim of a light source, the device includes several zener diodes each having a different zener voltage; and a selector having a plurality of positions, positioning the selector in each of the plurality of positions couples a corresponding one of the zener diodes between the positive terminal and the negative terminal. The cathode of the selected zener diode is coupled to the positive terminal and the anode of the selected zener diode is coupled to the negative terminal. The selected zener diode limits the voltage across the positive terminal and the negative terminal to set the high-end trim of a 0-10 volt lighting control signal.

Abstract: Aspects of the invention include a semiconductor device that includes a voltage-controlled type semiconductor element connected to a primary side of an ignition coil for supplying a voltage to an ignition device of an internal combustion engine, a first resistor and a second resistor inserted in series in a supplying path of an input signal for controlling a gate of the voltage-controlled type semiconductor element and a current control circuit including a current limiting circuit for controlling current flowing through the voltage-controlled type semiconductor element. Aspects of the invention also include a first by-pass forming element that is connected in parallel to the second resistor and by-passes the second resistor in a turning ON process of the voltage-controlled type semiconductor element, and a second by-pass forming element that is connected in parallel to the first resistor and the second resistor.

Abstract: A battery pack includes a battery for supplying power to a starter motor of a vehicle, and a battery management unit for monitoring a condition of the battery, and for blocking the supply of power from the battery to the starter motor when a stability condition requirement for the battery is not satisfied.

Abstract: An ignition apparatus is provided with a Zener diode as a limiter device, which limits a primary voltage of an ignition coil to be less than a Zener voltage, and a switching circuit, which prohibits a limiter function of the Zener diode at a start of discharge and switches the limiter device to perform the limiter function for a predetermined time period following the start of discharge. A secondary voltage is limited to be more than a secondary limit value. Even when blowout arises in discharging, re-discharging is avoided from arising immediately after the blowout and exhaustion of a spark plug caused by repetition of discharging is avoided.

Abstract: A method of ion sensing in a CD ignition system for an internal combustion engine comprises: a) closing the controllable switch in synchronism with the internal combustion engine for a period of time to transfer energy to the ignition coil primary to cause a spark breakdown across the spark plug; and b) observing the current in the secondary winding circuit indicative of ionization in the vicinity of the spark plug electrodes.

Abstract: Test fixtures for automotive parts, methods of fabricating test fixtures for automotive parts, and methods of heat testing automotive parts are disclosed. A method of fabricating a test fixture for supporting an automotive part may include forming a plurality of vertical support blades. Each of the plurality of vertical support blades comprises a support portion contoured to correspond to at least a portion of an underside of the automotive part. The method further includes assembling the plurality of vertical support blades such that each vertical support blade is substantially parallel to and spaced apart from an adjacent vertical support blade. The method further includes attaching the plurality of vertical support blades to a base such that the support portion of each of the plurality of vertical support blades is positioned to engage the corresponding portion of the underside of the automotive part.

Abstract: A method of inspecting a glow plug including an inner conductor and an outer disposed member, where the inner conductor includes an electrically conductive heating unit and an energization member to provide an energization path to the heating unit, and the outer disposed member includes a housing for the heating unit and a metal tubular member disposed on an outer periphery of the energization member. The method includes inspecting for the presence of short circuit abnormality based on a value that varies in response to a current that flows through the inner conductor upon application of a high voltage higher than a voltage applied during normal use of the glow plug to the inner conductor for a time short enough to suppress a temperature rise of the inner conductor due to application of the high voltage.

Abstract: The particulate matter detection device of the present invention is a particulate matter detection device 100 including an electrode portion 21 and detection means 23 for detecting an electrical characteristic of the electrode portion 21, whereby a particulate matter 36 contained in an exhaust gas 32 is detected on the basis of a change of the electrical characteristic due to the particulate matter 36 attached to the electrode portion 21. The particulate matter detection device i00 further includes removal means 25 and abnormality judgment means 26 for comparing an initial electrical characteristic in a use initial state of the device with the electrical characteristic measured in a state where the particulate matter 36 attached to the surface of the electrode portion 21 is removed by the removal means 25, to judge whether or not the particulate matter detection device i00 has an abnormality.

Abstract: A fault detection method is provided for detecting faults in an injector arrangement. The injector arrangement includes one or more piezoelectric fuel injectors connected in an injector drive circuit, and the injector drive circuit is arranged to control operation of the one or more piezoelectric fuel injectors. The fault detection method includes determining a sample voltage at a sample point in the injector drive circuit at a first sample time. The sample voltage is the voltage on an injector or is related to the voltage on an injector. The method further includes calculating a range of predicted voltages expected at the sample point at a second sample time following the first sample time, and determining the sample voltage at the sample point at the second sample time. The presence of a fault is detected if the sample voltage determined at the sample point at the second sample time is not within the range of predicted voltages.

Abstract: A control system comprising a powertrain relay diagnostic module that determines a single continuous period that a powertrain relay voltage is less than an ignition relay voltage, that compares the single continuous period to a single predetermined period, and that diagnoses a powertrain relay out of correlation (OOC) error when the single continuous period is greater than or equal to the single predetermined period, and an ignition relay diagnostic module that diagnoses an ignition relay OOC error when the ignition relay voltage is less than the powertrain relay voltage for a first predetermined cumulative period within a first predetermined total period.

Abstract: A system and method for monitoring an analog data signal is provided that includes an analog data compression subsystem. The analog data compression subsystem includes a frequency bandpass filter, a rectifier, and an integrator such as a leaky integrator or one that is reset after being sampled. An analog data signal is bandpass filtered by the frequency bandpass filter, rectified, and integrated in the analog domain. The output of the integrator is converted into a digital data value by an analog-to-digital converter circuit that samples the integrator at a desired sample rate or duty cycle. The output of the integrator can trigger an event based upon established criteria. Multiple analog data compression subsystems can be used in parallel to monitor multiple frequency bands-of-interest.

Abstract: An automatic variable gain amplifier is provided. The automatic variable gain amplifier automatically adjusts the amplification of a signal, and in one embodiment, an ion signal, based on the amplitude of the peaks of the signal. The automatic variable gain amplifier detects the peaks of the signal, compares them to a threshold value, and, based on this comparison, varies the amount by which the signal is amplified. The automatic variable gain amplifier produces a composite output waveform for an input waveform with an amplitude that may vary over a plurality of orders of magnitude.

Abstract: A system and method for non-contact engine parameter sensing. A magnetized engine component establishes a magnetic field that varies in response to stress imparted within the engine. A magnetic field sensing element spaced from the magnetized engine component is configured to provide an output indicative of a state of combustion in response to the magnetic field.

Abstract: A method for estimating the magnetization level of one or more permanent magnets established in one or more permanent magnet rotors of a wind turbine generator includes the steps of: establishing one or more magnetization sensors at the stator of the generator, connecting the one or more magnetization sensors to a measuring mechanism, processing measured data in the measuring mechanism, and establishing values of magnetization. Furthermore the invention also relates to a wind turbine.

Abstract: An abnormality diagnosing apparatus for a glow plug 8 provided in an engine 1. The glow plug 8 is energized by power supply from a battery 7 during a glow period from starting of the engine 1 to completion of engine starting. First, on the basis that power output edf from an alternator 12, which is driven to charge the battery 7, is within an appropriate range and that the variation ?edf of the power output edf at the end of the glow period is not more than a reference value a, it is determined if there is a possibility of an abnormality in the glow plug 8. After the determination, the plug 8 is energized temporarily. Then, on the basis that the power output edf is within a modified appropriate range, which has a greater upper limit than the previous appropriate range and that the variation ?edf while the plug 8 is energized is not more than the reference value a, it is determined that the an abnormality actually occurred.

Abstract: On the fulfillment of a specified condition, a temperature signal outside an actuating device is detected to which a piezoelectric actuator is assigned. A piezoelectric temperature value is determined by the temperature signal. A temperature-capacitance characteristic value of the piezoelectric actuator is determined by the piezoelectric temperature value through specified mapping. A measured capacitance characteristic value is determined by a detected piezoelectric actuator charge and voltage corresponding to the temperature signal. A first correction capacitance characteristic value is determined by the measured capacitance characteristic value and the temperature-capacitance characteristic value. Independently, the charge and the voltage of the piezoelectric actuator is detected and the measured capacitance characteristic value is determined on the basis of these.

Abstract: A sensor measures the position of an actuator of an internal combustion engine, wherein the actuator is electromotively driven by means of a drive connection. The housing of the actuator accommodates at least one position sensor which detects the position at the drive connection. At least one position sensor is connected to a circuit with an operating voltage source and receives signals from at least one position sensor. The circuit and the at least one position sensor are connected via a cable that conducts voltage and signals. The circuit comprises also at least one current measuring device connected in series to the operating voltage source. A current change is transmitted via the cable by means of the signals generated by the at least one position sensor depending on the position of the actuator.

Abstract: An internal-combustion-engine combustion condition detection apparatus is provided with an ignition means that makes an ignition plug ignite a fuel; an ignition control means that controls the operation of the ignition means; an ion-current detection means that detects an ion current generated; an ion current detection range setting means that sets an ion-current detection range; a preignition detection means that detects preignition within a detection range to be set; a leakage current detection range setting means that sets a leakage-current detection range; and a leakage current determination means that determines whether or not a smolder exists, based on a current detected, within a detection range to be set, by the ion-current detection means. The ignition control means includes a non-combustion-stroke ignition control means; the leakage-current detection range set by the leakage current detection range setting means is set within the non-combustion stroke.

Abstract: When the mobile inspection terminal determines that the inspection standard information received from a server is the “specification”, it displays the received inspection standard information and out-of-standard specification information on a liquid crystal display. When it is confirmed in this state that selected inspection standard information is input, whether or not an part to be inspected is acceptable is determined based on the inspection standard information, and the server is notified of a result of determination. Further, when it is determined that the inspection standard information is the “measured value”, a measured value input screen is displayed on the liquid crystal display. When it is confirmed in this state that a measured value is input, whether or not the part to be inspected is acceptable or not is determined based on the input information, and the server is notified of a result of determination.

Abstract: A measuring device (1) for detecting signals, particularly signals in an ignition system of an internal combustion engine, has a signal line (2); and a measuring electrode (3) connected to the signal line (2) for coupling a signal to be detected into the signal line (2), wherein the measuring electrode has a flexible tip (4) , wherein the tip (4) includes tubular segments (4?); wherein one end of a segment (4?) is pivotably inserted into another end of another segment (4?); and wherein the tip (4) including the tubular segments (4?) is lockable into position in a bent state.

Abstract: A drive control device that includes: a driving circuit to drive a driving source; a condition detector to detect the condition of at least one of the driving source and the driving circuit to output a condition signal thereof; a controller to control the driving circuit based on the condition signal; an alarm detector to detect an occurrence of an alarm based on the condition signal; an alarm code generator to analyze the alarm detected by the alarm detector to generate an alarm code; and an alarm display to display the alarm code generated by the alarm code generator, in which the alarm display includes one or more lighting section to display the alarm code by a lighting pattern of the lighting section.

Abstract: An internal-combustion-engine combustion condition detection apparatus is provided with an ignition means that makes an ignition plug ignite a fuel; an ignition control means that controls the operation of the ignition means; an ion-current detection means that detects an ion current generated; an ion current detection range setting means that sets an ion-current detection range; a preignition detection means that detects preignition within a detection range to be set; a leakage current detection range setting means that sets a leakage-current detection range; and a leakage current determination means that determines whether or not a smolder exists, based on a current detected, within a detection range to be set, by the ion-current detection means. The ignition control means includes a non-combustion-stroke ignition control means; the leakage-current detection range set by the leakage current detection range setting means is set within the non-combustion stroke.

Abstract: In an abnormal condition detecting system, an electronic control unit determines that a condition for carrying out a process for detecting an abnormal condition of an electric motor and/or electric supply lines for the motor is satisfied, when a position of a control valve is at its initial closed position. Then, the electronic control unit stops supply of the electrical power to the electric motor, to start a detection of the abnormal condition (electrical disconnection) in the motor and/or the electric supply lines.

Abstract: An abnormality diagnosing apparatus for a glow plug 8 provided in an engine 1. The glow plug 8 is energized by power supply from a battery 7 during a glow period from starting of the engine 1 to completion of engine starting. First, on the basis that power output edf from an alternator 12, which is driven to charge the battery 7, is within an appropriate range and that the variation ?edf of the power output edf at the end of the glow period is not more than a reference value a, it is determined if there is a possibility of an abnormality in the glow plug 8. After the determination, the plug 8 is energized temporarily. Then, on the basis that the power output edf is within a modified appropriate range, which has a greater upper limit than the previous appropriate range and that the variation ?edf while the plug 8 is energized is not more than the reference value a, it is determined that the an abnormality actually occurred.

Abstract: An adaptive array wireless communication apparatus able to suitably select antenna elements, small in amount of processing, fast in convergence speed, and suitable for transmission/reception, and a method of the same, which controls the directionalities of array antenna elements based on array weights, controls an antenna element selecting unit 23 so that the antenna elements are intermittently determined, and adjusts a period of determination of the antenna elements based on information of the antenna elements determined at a controlling unit 26.

Abstract: A method for determining degraded valve operation. According to the method, valve degradation can be determined from the duration of a spark event. This method allows for the determination of both intake and exhaust valve degradation.

Abstract: A decentralized method and system for vehicle emissions testing uses the OBD unit of the vehicle to be tested and includes a remote data storage location in communication with a plurality of decentralized inspection stations or test locations. Each inspection location is designed to allow for “self-service” inspection through a kiosk that includes all of the hardware and software necessary to carry out the testing process and to communicate test data and information to the remote storage location.

Abstract: A method of sensing water within a fuel-water separator assembly disposed within a fuel system of an internal combustion engine is provided. The method includes the steps of: A) monitoring a single selectively activatable sensor within the fuel-water separator assembly to detect the presence of water; B) determining if the sensor is activated for greater than or equal to a first predetermined percentage of time, but less than or equal to a second predetermined percentage of time and providing a first level of warning if true; and C) determining if the sensor is activated for greater than the second predetermined percentage of time and providing a second level of warning if true. An apparatus configured to perform the claimed method is also disclosed.

Abstract: A visual indicator system comprises a fuel injector pulse width signal generator in communication with an engine fuel injector by means of a circuit wire. A visual indicator is in circuit communication with the circuit wire and configured to light up in a first stage to indicate a good electrical connection of the fuel injector to the fuel injector pulse width signal generator to the engine fuel injector when the fuel injector signal generator, the engine fuel injector and the circuit wire are energized by a vehicle ignition system. The visual indicator is further configured to light up a second stage to indicate a good pulse width signal generator operation when an automobile engine is running through operation of the fuel injector signal generator, the engine fuel injector and the circuit wire.