Glossary: Engine Blocks and Cylinder Heads

An intake port design that admits air into the cylinder at an angle to impart more swirl, or turbulence, to charge air.

A method of estimating vehicle emissions by measuring only emissions produced while the vehicle is operating. It does not include an estimate of emissions produced while producing and delivering the energy.

A battery charger that applies a selected amperage to charge a battery through a manually adjusted current- selection switch.

A component used by multiple plunger injection pumps to produce low-friction, reciprocating motion of the plungers.

1. A branch of information technology that uses specialized applications for the long-distance transmission of information to and from a vehicle.
2. This is a term to describe wireless communication technology used to remotely communicate with a vehicle to monitor a wide range of vehicle information. The systems data typically include vehicle location, real-time engine operation, retrieving of fault codes for analysis, and other vehicle activity derived from CANbus data.

A test that measures cooler efficiency or determines whether the cooler is possibly externally restricted.

A feature of aluminum block construction where a single bolt is used to clamp both the cylinder head and the main bearing caps together.

The ability of an engine to convert the energy content of fuel into mechanical force.

A temperature-sensitive variable resistor commonly used to measure coolant, oil, fuel, and air temperatures.

Exhaust system sensors that measure regulated emissions leaving the exhaust pipe. Ammonia, soot, and NOx sensors are examples of these sensors.