1012-Electrical Diagrams

Transcription

1 Term Absolute Pressure 1012-Electrical Diagrams Definition Total or true pressure. Gauge pressure plus atmospheric pressure. Absolute that includes the atmospheric pressure in its reading. This sensor provides a reading of approximately 14.7psi at sea level when reading atmospheric pressure. AC Alternating Current Accelerator used to determine the relative position of the accelerator pedal. Position Actuator A solenoid that positions a valve as needed to provide the control commanded by the ECM. Advanced Injection Timing Algorithm Alternating Current Alternator Ammeter Ampere Assembly Diagram Atom Backlash Bar Battery bhp Bore Brake Horsepower Butt Splice Connector Capacitor Circuit Breaker Closed Circuit Combination s Compression Ratio Injection that occurs earlier in the compression stroke when compared to base timing. With advanced timing the start of injection occurs more crank angle degrees before top dead center (BTDC). Software stored in the ECM that is used to establish a step-by-step procedure to determine a value based on inputs from engine sensors. This value is used to provide output to various devices on the engine. The electrons flow first in one direction in the circuit and then in the opposite direction at regular time intervals. A power source that supplies electrical force necessary to cause electrical current flow in a circuit. A tool used to measure current flow in a circuit. The unit of measure for current flow. A type of diagram that shows the physical relationship of components for the purpose of manufacture or repair without including electrical information related to the function or troubleshooting of the system. The building blocks that create all matter. Atoms are made up of three basic particles: protons, neutrons, and electrons. The amount a shaft is allowed to move in a rotational direction or the clearance between the teeth of two gears in mesh. A unit of pressure equal to 14.5 psi. A common source of Direct Current voltage. Brake Horsepower The diameter of an engine cylinder. The amount of power available for useful work Used to repair damaged wires. The butt splice uses a soft collar and an insulating sleeve to make the connection between the new wire section and the existing wiring harness. A device for storing electrical energy. A circuit protection device. Excess current will cause the circuit breaker to trip, the circuit is opened, and current can no longer flow. A complete path through which current can flow. s that contain both pressure and temperature sensors in one housing. The ratio of cylinder volume with the piston at bottom dead center and the cylinder volume with the piston at top dead center.

2 Compressor Conductor Conventional Flow Corrosion Crankpin Current DC De-aeration De-aeration System Digital Multimeter Diode Direct Current Displacement ECM (Electronic Control Module) Electron Electron Current Flow Emissions End Play Engine Speed Environmental Protection Agency Fault Code Fixed Resistor Fuse Fusible Link The portion of the turbocharger that is driven by the turbine. Provides a path for the electrons to move between the power source and the load. The apparent movement of the positive charges from the positive battery post to the negative battery post. A buildup on a connector, caused by chemical reaction that can prevent good contact. This has the effect of insulating the connector. The cylindrical piece to which a connecting rod is attached The measure of the number of electrons passing a point in a circuit. Direct Current The removal, bleeding or purging of air A self bleeding type of cooling system that fills from the bottom up. The incoming coolant pushes the air out of passages at the top of the engine, purging air from the system One tool combining the capabilities of a voltmeter, ammeter, and ohmmeter in one piece of test equipment. An electrical one way check-valve. A rectifier. The flow of electrons is in one direction from a source, through the circuit, and back to the source. The volume marked out by a piston as it travels from the top of its stroke to the bottom. For a multicylinder engine the total engine displacement is the displacement of one cylinder multiplied by the number of cylinders in the engine. A computer portion of the electronic control system that is responsible for engine control, diagnostics, and user features. This component receives signals from engine sensors and OEM switches. It contains software based control algorithms and diagnostic algorithms. These algorithms process the input signals and transmit signals to the appropriate output devices. A basic particle of an atom. Electrons have a negative charge or polarity. The electrons orbit around the nucleus in layers. Electron movement flowing from the negative terminal of the source, through the conductors to the load, and back to the positive terminal. The various chemical compounds released into the atmosphere after combustion has taken place. The amount a shaft can travel in a fore and aft direction. The sensor that is used to determine engine speed and crankshaft position based on the position of the SIR (Signal Indicator Ring) on the crankshaft. A federal agency with the responsibility for regulating exhaust emissions, among many other things pertaining to the environment. A digital code representing a specific type of control system failure or abnormality. A resistor that does not have the ability to have its resistance value changed. A circuit protection device. The protective element in the fuse melts. When the metal melts, the circuit is opened, and current can no longer flow. A circuit protection device. Works by melting a specific portion of its wiring when current exceeds a certain amperage level, the circuit is opened, and current can no longer flow.

3 Gauge Number Gauge Pressure Gauge Generator Glow Plugs Ground Hall-Effect Horsepower Idler Gear Inputs Insulation kilopascal Kilowatt kw Wire diameters are measured using the American Wire Gauge. Each diameter of wire is assigned a gauge number. The larger the gauge number, the smaller the wire. Pressure sensor that reads relative pressure that does not include atmospheric pressure in the reading. that does not include the atmospheric pressure in its reading. This sensor provides a reading of 0 when it is reading atmospheric pressure. A power source that supplies electrical force necessary to cause electrical current flow in a circuit. Electrical resistance heaters installed in the prechambers to assist in cold starting. An electrical reference point, such as the engine block, used to make electrical measurements with a multimeter. A type of electronic sensor used to determine motion and proximity. From this signal, the ECM calculates engine speed and position. The unit of power in mechanical systems. One horsepower is equal to approximately 750 watts. Gear used to transfer motion from a drive gear to a driven gear. Idler gears are typically mounted on a stationary shaft. Electrical devices, such as sensors and switches, that provide signals that indicate engine operating conditions and switches that provide operator input to determine desired operation. Used to prevent the flow of electricity, such as the coating on an electrical wire. Examples of good insulators include: plastic, rubber, glass. A unit of pressure equal to approximately psi One thousand watts. Abbreviation for kilowatt. Liner Protrusion The amount the cylinder liner protrudes above the engine block. Load Converts the energy of the moving electrons to a more useful form. mb The abbreviation for millibar. One millibar equals.001 Bar Micron Unit of measurement equal to one thousandth of a millimeter. Neutron A basic particle of an atom. Neutrons have no charge or polarity. Protons and neutrons bond together to form the nucleus of the atom. NOx Emissions that form when combustion temperatures increase to the point where nitrogen is oxidized along with the fuel. NOx emissions are one component of photochemical smog. Nucleus The center of the atom. Protons and neutrons bond together to form the nucleus of the atom. OEM Original Equipment Manufacturer. Ohm Measurement of electrical resistance. An Ohm is the amount of resistance to flow that will allow an Ampere of current to flow with 1 Volt of electrical pressure. Ohm's law A mathematical formula which shows the relationship between voltage, resistance, and current. Open Circuit The electrical current path is broken Parallel Circuit A circuit with the multiple current flow paths available. Poles The number of electrically independent switch contacts that are switched simultaneously.

4 Potential Difference Potentiometer Power Source Prechamber Proton PSI PWM Rectifier Relay Resistance Resistor Retarded Injection Timing Rheostat Schematic Semi-conductor Series circuit Series/parallel circuit Short Circuit Stroke Switch Tappets TDC Thermistor Thermostat Throws Thrust Bearing Difference of electrical pressure between two points measured in volts. A type of variable resistor used to control voltage. A source of electrons. A small chamber into which the fuel injector feeds fuel. The prechamber is external to but connected with the main chamber. A basic particle of an atom. Protons have a positive charge or polarity. Protons and neutrons bond together to form the nucleus of the atom. Pounds per Square Inch Pulse Width Modulated An electrical one way check-valve. A device that uses electrical current to open and close a circuit upon demand. The opposition to current flow. Devices that limit current flow due to the type of material from which they are constructed. Injection that occurs later in the compression stroke when compared to base timing. With retarded timing the start of injection occurs less crank angle degrees before top dead center (BTDC). A type of variable resistor. A diagram that shows the functional relationship of components and the signal flow between them. Materials whose atoms are neither especially good or poor at giving up electrons. Semi-conductors are important in electronics because they are used to make transistors and integrated circuits. Silicon is an example. A circuit in which the current flows in only one path from the source to the load and from the load back to the source to complete the circuit. A circuit in which part of the circuit is connected in series and part of the circuit is connected in parallel with the source. A current flow through a path with very little resistance. This can be intentional such as with a closed switch or an unintentional path such as physical damage to connectors or wiring or defective electrical components. The distance from the top of a piston's travel to the bottom or the distance a piston travels during one half turn of the crankshaft. A device that intentionally breaks the electrical path. A switches is used to open and a close circuit. Camshaft followers or Lifters. Top-Dead-Center Type of material used in temperature sensors used on Cummins' engines. An automatic temperature sensing device utilizing a mechanical valve to regulate the flow path of a fluid. The number of switch positions in a single switch. A bearing that controls the amount of endplay of a shaft. Top-Dead-Center The absolute upward limit to the pistons travel in the cylinder Torque A turning or twisting force Turbine The portion of the turbocharger that is driven by the exhaust gases. Turbocharger Centrifugal air pump or blower driven by exhaust gas turbine. It fills the engine cylinders with fresh air at a higher pressure than atmospheric. Variable resistor A resistor with the ability to have its resistance value changed.

5 Viscosity Voltage Voltmeter VR s VSS (Vehicle Speed ) Wastegate Watt Wiring Diagram Wiring harness A fluid's resistance to flow. Electrical pressure. Used to measure the difference in voltage between two points in an electrical circuit. Variable reluctance sensors (also known as magnetic pickup style sensors) The sensor typically mounted on the transmission tailshaft used by the ECM to calculate the current vehicle speed. A mechanical device that allows exhaust to bypass the turbocharger turbine, regulating boost. The unit of measure for electrical power. A diagram that shows the wire routing between components. Wiring diagrams include connector numbers, wire numbers and signal names. These diagrams associate the electrical with the physical to the replaceable component level. Distributes power to engine electrical components. The wiring harness also routes signals to and from equipment associated with the engine and its accessories.