What Are Common Generator And Engine Acronyms And What Do They Mean?

This guide provides clear definitions for common acronyms used in generator systems, diesel engines, and emissions components. These terms appear frequently in service manuals, diagnostics, and technical support discussions. Refer to the list below for simple explanations of each acronym.

• AVR – Automatic Voltage Regulator. Controls generator output voltage for stable power.
• EGR – Exhaust Gas Recirculation. Recirculates exhaust gas to reduce oxygen in the combustion mix.
• DOC – Diesel Oxidation Catalyst. Filters unburnt fuel and carbon from exhaust gases.
• DPF – Diesel Particulate Filter. A honeycomb-style filter that traps diesel particulates before they exit the exhaust.
• SCR – Selective Catalytic Reduction. Uses DEF injection to reduce carbon emissions.
• DEF – Diesel Exhaust Fluid. Chemical mixture used in exhaust systems to neutralize carbon.
• ETM – Exhaust Temperature Management. Creates backpressure and heat to help remove carbon buildup.
• PCV – Positive Crankcase Ventilation. Releases excess crankcase pressure.
• SCV – Suction Control Valve. Controls fuel discharge from the high-pressure pump.
• ECM / ECU – Engine Control Module or Unit. The engine computer that manages electronic functions.
• CKP – Crankshaft Position Sensor. Measures crankshaft position by reading gear teeth.
• CMP – Camshaft Position Sensor. Measures camshaft position through magnetic readings.
• RPM – Revolutions Per Minute. Engine speed.
• HP – Horsepower. Measurement of work performed.
• Hz – Hertz. Frequency measurement.
• kVA – Kilovolt-Amps.
• kW – Kilowatts.
• V – Voltage.
• A – Amperage.
• CFM – Cubic Feet per Minute.
• PSI – Pounds per Square Inch.

For the full reference list, click here: ANA_Acronym Definitions