Glossary: Engine Blocks and Cylinder Heads

A category of renewable fuel made from a combination of diesel fuel and ethanol (a type of alcohol made from plant sugars).

Caterpillar’s marketing name used to describe the injector calibration code assigned to Caterpillar injectors.

A type of EUI containing a nozzle control valve and spill control valve. Delphi manufactures E3 injectors for several OEM engine producers.

A term used to describe the operation of the exhaust valve during compression release braking events.

An engine operating strategy that varies intake valve closing to adjust the air charge pressure and temperature.

A partial-authority fuel system used by Mack trucks. The inline injection pump had an electronically controlled governor and an electrohydraulic mechanism to electronically vary injection timing.

Filter media that is thin and highly compressed, which traps dirt contaminants on the surface of the filter media.

Also known as active or dynamic compression ratio. A comparison between atmospheric pressure (1 bar or 14.7 per square inch absolute [psia]) and peak cylinder pressure at TDC.

The distance the plunger moves between fill port closing and spill port opening.

A pump that runs for the first 2 minutes after the key is switched on to quickly supply the gear pump for faster starting.