Glosario De Terminos Tecnicos

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glossary of terms

Engine Products Division

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GLOSSARY OF TERMS

Contents
Caterpillar Terms . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-65 Caterpillar Acronyms and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67-76 P. C. Related Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77-82 P. C. Related Acronyms. . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83-84 Terms Pertaining to the Integration of Cat and MaK . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

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GLOSSARY OF TERMS
A/F Dynamic Setting – The dynamic (engine running) setting of a device on the engine which limits the amount of fuel injected per stroke as a function of the boost. Aftercooler – A heatexchanger inserted into the induction system of an engine after any device used to compress combustion air. Air Bleeder – A device used to remove air from a hydraulic system. Types include a needle valve, capillary tubing to the reservoir, and a bleed plug. Air Cleaner – A device (filter) for removing unwanted solid impurities from the air before the air enters the intake manifold. Air Compressor– A device used to increase air pressure. Air Conditioning – The simultaneous control of all or at least the first three of the following factors affecting the physical and chemical conditions of the atmosphere within a structure: temperature, humidity, motion, distribution, dust, bacteria, odors, toxic gases and ionization — most of which affect, in greater or lesser degree, human health orcomfort. Air Cooled Condenser – Heat of compression is transferred from condensing coils to surrounding air. This may be done either by convection or by a fan or blower. Air Diffuser – Air distribution outlet designed to direct airflow into desired patterns. Air-Fuel Ratio – The ratio (by weight or by volume) between fuel and air. Air-Fuel Ratio Control (AFRC) – A feature on Cat engines which measuresactual engine speed and boost pressure to reduce smoke and lower fuel consumption. Air Gap – The distance between two components; clearance between internal rotating member and stationary outside member. Refers to gap per side.

Abrasion – Wearing or rubbing away of a part. Absolute Humidity – Amount of moisture in the air, indicated in grains per cubic foot. Absolute Pressure – Gauge pressureplus atmospheric pressure (14.7 lb per in2). Absolute Temperature – The temperature measured using absolute zero as a reference. Absolute zero is -469.69° F (-273.16° C) and is the lowest point of temperature known. Absorber – A device containing liquid for absorbing refrigerant vapor or other vapors. In an absorption system, that part of the low side used for absorbing refrigerant vapor.Acceleration – The rate of increase of velocity per time unit (example: feet per second). Accumulator – A device used for storing liquid under pressure (sometimes used to smooth out pressure surges in a hydraulic system). Active Power – The real power supplied by the generator set to the electrical load. Active power creates a load on the set’s engine and is limited by the horsepower of the engine. Activepower does the work of heating, turning motor shafts, etc., and is measured in watts, kilowatts, and megawatts. Actuator – A device which uses fluid power to produce mechanical force and motion. Additive – 1. A compound which is added to improve fuel. 2. A substance added to oil to give it certain properties. For example, a material added to engine oil to lessen its tendency to congeal or...