435 lines
11 KiB
Markdown
435 lines
11 KiB
Markdown
# Acronyms, Abbreviations and Terminology
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## This document contains all of the commonly used acronyms, abbreviations and terminology used by rusEFI
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<details markdown="1"><summary><u>AAP</u></summary>
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Absolute Atmosphere Pressure
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</details>
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<details markdown="1"><summary><u>AFR</u></summary>
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Air Fuel Ratio - See also Lambda, Stoichiometric
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AFR is the ratio of air to fuel, often expressed as "14.7:1"
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</details>
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<details markdown="1"><summary><u>AIT</u></summary>
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Air Intake Temperature
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</details>
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<details markdown="1"><summary><u>AWG</u></summary>
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https://en.wikipedia.org/wiki/American_wire_gauge
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</details>
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<details markdown="1"><summary><u>Baro</u></summary>
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Shorthand for Barometric pressure
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</details>
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<details markdown="1"><summary><u>BTDC</u></summary>
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Before TDC, Before Top Dead Center - See also ATDC
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</details>
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<details markdown="1"><summary><u>BMEP</u></summary>
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Brake mean effective pressure
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</details>
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<details markdown="1"><summary><u>CAS</u></summary>
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Crank Angle Sensor Also See [CPS - Wikipedia]](<http://en.wikipedia.org/wiki/Crankshaft_position_sensor>)
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</details>
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<details markdown="1"><summary><u>CLT</u></summary>
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Coolant Temperature, same as ECT
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</details>
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<details markdown="1"><summary><u>CoV</u></summary>
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Coefficient of variability
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</details>
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<details markdown="1"><summary><u>CPS</u></summary>
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Crankshaft Position Sensor
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</details>
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<details markdown="1"><summary><u>CR</u></summary>
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compression ratio
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</details>
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<details markdown="1"><summary><u>DI</u></summary>
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Direct injection
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</details>
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<details markdown="1"><summary><u>DISA</u></summary>
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BMW variable inlet manifold resonance system
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</details>
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<details markdown="1"><summary><u>EDIS</u></summary>
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Electronic Distributorless Ignition System - An older Ford ignition system that combined a set of ignition IGBTs and some electronics to assist the ECU. Obsolete on modern ECUs.
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</details>
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<details markdown="1"><summary><u>EGO</u></summary>
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Exhaust Gases Oxygen - see also lambda sensor, WBO2,
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Often used when referring to air fuel sensors like the lambda sensor.
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Sometimes also used as HEGO or Heated Exhaust Gas Oxygen.
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</details>
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<details markdown="1"><summary><u>EGR</u></summary>
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Exhaust gas recirculation
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</details>
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<details markdown="1"><summary><u>EGT</u></summary>
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Exhaust gas temperature
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</details>
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<details markdown="1"><summary><u>EOI</u></summary>
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End Of Injection - See also SOI
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</details>
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<details markdown="1"><summary><u>ETB</u></summary>
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Electronic throttle body
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</details>
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<details markdown="1"><summary><u>EVC</u></summary>
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Exhaust valve closing
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</details>
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<details markdown="1"><summary><u>EVO</u></summary>
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Exhaust valve opening
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</details>
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<details markdown="1"><summary><u>GDI</u></summary>
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Gasoline Direct Injection
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</details>
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<details markdown="1"><summary><u>Hall</u></summary>
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A type of sensor that requires a power and earth wire in addition to its signal wire, the output is normally a 5v square wave.
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</details>
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<details markdown="1"><summary><u>High Side</u></summary>
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A driver that is open circuit when off and powered to 5v or 12v when on.
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</details>
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<details markdown="1"><summary><u>High/Low</u></summary>
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a pushpull or HighLow is an output that is powered "high" (12v or 5v) and switched to low (earth).
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</details>
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<details markdown="1"><summary><u>High and Low Z</u></summary>
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High and low resistance, used in terms of fuel injectors, normally around 14 ohms for high impedance and ~4 ohms for low.
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</details>
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<details markdown="1"><summary><u>IAT</u></summary>
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Intake Air Temperature
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</details>
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<details markdown="1"><summary><u>IFR</u></summary>
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Injector Flow Rate
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</details>
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<details markdown="1"><summary><u>IGBT</u></summary>
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[IGBT - Wikipedia]](<http://en.wikipedia.org/wiki/Insulated-gate_bipolar_transistor>)
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A common type of transistor used for switching high power devices like ignition coils with a low power/voltage output.
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</details>
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<details markdown="1"><summary><u>IMEP</u></summary>
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Indicated mean effective pressure
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</details>
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<details markdown="1"><summary><u>Injector Impedance</u></summary>
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The resistance of the fuel injectors, see high and low Z
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</details>
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<details markdown="1"><summary><u>IPW</u></summary>
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Injector Pulse Width
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</details>
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<details markdown="1"><summary><u>IVC</u></summary>
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Intake valve closing
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</details>
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<details markdown="1"><summary><u>IVO</u></summary>
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Intake valve opening
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</details>
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<details markdown="1"><summary><u>Low side</u></summary>
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A driver that is open circuit when off and grounded to earth when switched on.
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</details>
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<details markdown="1"><summary><u>LQFP</u></summary>
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Low profile quad flat package
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</details>
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<details markdown="1"><summary><u>MAF</u></summary>
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Mass Air Flow, often used in the context of air flow or load sensors.
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</details>
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<details markdown="1"><summary><u>MAP</u></summary>
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Manifold Absolute Pressure or perhaps Manifold Air Pressure, often used in the context of load sensors.
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</details>
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<details markdown="1"><summary><u>MBT</u></summary>
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Mean best timing, used in context of spark timing, it is the spark timing that results in the best torque
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</details>
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<details markdown="1"><summary><u>MLV</u></summary>
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Mean the tool MegaLogViewer
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</details>
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<details markdown="1"><summary><u>MFB</u></summary>
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Mass fraction burned, often stated with a number after i.e. MFB10/MFB50/MFB90 and refers to the fraction of the fuel burned by mass.
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</details>
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<details markdown="1"><summary><u>MRE</u></summary>
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Micro rusEFI
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</details>
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<details markdown="1"><summary><u>NGC</u></summary>
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Chrysler Next Generation Controller
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</details>
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<details markdown="1"><summary><u>NTC</u></summary>
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Negative temperature coefficient, used in context of temperature sensors and refers to the resistance increasing as temperature decreases.
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</details>
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<details markdown="1"><summary><u>PIP</u></summary>
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Profile ignition pickup See [Profile Ignition Pickup - Wikipedia]](<http://en.wikipedia.org/wiki/Profile_ignition_pickup>)
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</details>
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<details markdown="1"><summary><u>PFI</u></summary>
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Port fuel injection
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</details>
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<details markdown="1"><summary><u>PID</u></summary>
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A proportional–integral–derivative controller
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</details>
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<details markdown="1"><summary><u>PNP</u></summary>
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Plug and play
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</details>
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<details markdown="1"><summary><u>PPS</u></summary>
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Pedal Position Sensor
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</details>
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<details markdown="1"><summary><u>Primary Coil</u></summary>
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The primary winding of an ignition coil
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</details>
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<details markdown="1"><summary><u>RE</u></summary>
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rusEFI
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</details>
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<details markdown="1"><summary><u>REO</u></summary>
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rusEFI Online
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</details>
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<details markdown="1"><summary><u>RUSEFI</u></summary>
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Really Uber Simple EFI? Robust Ultra Simple EFI? Retarded Unproven Shitty EFI?
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</details>
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<details markdown="1"><summary><u>Secondary Coil</u></summary>
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The secondary winding of an ignition coil.
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</details>
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<details markdown="1"><summary><u>Sequential</u></summary>
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Often this refers to Sequential injection, which means the injectors fire individually for each cylinder and often at a specific crank angle.
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This can be handy for engines direct injection or to try to spray the injector into the cyl while the intake valve is open. If an engine can inject onto an open inlet valve it will reduce the amount of fuel wetting the port walls and help reduce low load emissions.
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Sequential is required for direct injection engines like common rail diesel.
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</details>
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<details markdown="1"><summary><u>SBC</u></summary>
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Small Block Chevy
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</details>
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<details markdown="1"><summary><u>SD</u></summary>
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Speed Density this is a method of predicting how much fuel should be delivered to an engine. This is a MAP based system which uses pressure to make a prediction of how much O2 is entering the cyl.
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</details>
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<details markdown="1"><summary><u>SI</u></summary>
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Spark injection
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</details>
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<details markdown="1"><summary><u>Smart Coil</u></summary>
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A type of ignition coil that has its ignition drivers (IGBT) built into the coil, this means they only receive a 5v signal to activate.
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</details>
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<details markdown="1"><summary><u>SMD</u></summary>
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Surface mount device, interchangeable with SMT
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</details>
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<details markdown="1"><summary><u>SMT</u></summary>
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Surface mount technology, interchangeable with SMD
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</details>
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<details markdown="1"><summary><u>SOI</u></summary>
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Start Of Injection - See also EOI
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</details>
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<details markdown="1"><summary><u>Staged injection</u></summary>
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The use of 2 injectors for one cyl. This commonly means at low RPM and lower loads, one injector is turned on which allows for finer control over idle fuel delivery, while at higher RPM and higher Loads both injector inject fuel which allows for larger amounts of fuel to be delivered.
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</details>
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<details markdown="1"><summary><u>Stoichiometric</u></summary>
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The ideal quantity of fuel to burn with a quantity of air for complete combustion. For gasoline this is 14.7:1, ethanol is 9:1 and methanol 6.47:1
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</details>
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<details markdown="1"><summary><u>SOIC</u></summary>
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small outline integrated circuit
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</details>
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<details markdown="1"><summary><u>TDC</u></summary>
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Top Dead Center
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</details>
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<details markdown="1"><summary><u>TPS</u></summary>
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Throttle Position Sensor
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</details>
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<details markdown="1"><summary><u>TMAP</u></summary>
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A sensor combining IAT ("Temperature") and MAP
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</details>
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<details markdown="1"><summary><u>TE</u></summary>
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TE connectors, they produce the ampseal connectors on the proteus and a lot of OEM ECUs.
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</details>
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<details markdown="1"><summary><u>TFI</u></summary>
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Thick Film Ignition - Ford distributor - Likely unsupported at this time.
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</details>
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<details markdown="1"><summary><u>TFSI</u></summary>
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Turbo Fuel Stratified Injection - A VW direct injection lean burn strategy
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</details>
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<details markdown="1"><summary><u>TLE</u></summary>
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Short for TLE8888 the Infineon chip on the MRE
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</details>
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<details markdown="1"><summary><u>TVIS</u></summary>
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Toyota variable intake system, a variable inlet length system that switches on/off a set of longer intake manifold runners.
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</details>
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<details markdown="1"><summary><u>Valvetronic</u></summary>
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BMW variable valve lift system
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</details>
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<details markdown="1"><summary><u>VANOS</u></summary>
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BMW variable valve timing system
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</details>
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<details markdown="1"><summary><u>VCC</u></summary>
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Common Collector Voltage; the positive supply voltage for an integrated circuit
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</details>
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<details markdown="1"><summary><u>VDD</u></summary>
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the DC Power supply connected to Drain Terminal of any FET circuit.
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</details>
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<details markdown="1"><summary><u>VE</u></summary>
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Volumetric Efficiency, often expressed as a decimal value i.e. 0.8 (for 80%)
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</details>
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<details markdown="1"><summary><u>VISA</u></summary>
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BMW variable inlet manifold length system
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</details>
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<details markdown="1"><summary><u>VOL</u></summary>
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Short for engine volume
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</details>
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<details markdown="1"><summary><u>VSS</u></summary>
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Vehicle speed sensor
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</details>
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<details markdown="1"><summary><u>VVT</u></summary>
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Variable valve timing
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</details>
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<details markdown="1"><summary><u>WBO</u></summary>
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Wide Band Oxygen, same as EGO
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</details>
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<details markdown="1"><summary><u>WOT</u></summary>
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Wide Open Throttle
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</details>
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