Gudgeon pin: A hollow cylindrical shaped pin connecting the piston to the small end of the connecting rod.

Governor run-out: The percentage speed change when the control rod is moved by the governor from the maximum fuel delivery position to the no-fuel delivery…

Governor overrun: The difference between the governor cut-off speed and the governor cut-in speed.

Governor Hysterisis: The difference between the governor cut-off speed at which point fuel delivery just stops with the increasing injection pump speed and the cut-off…

Governor cut-off speed: The speed of the fuel injection pump at which the governor just stops the fuel delivery.

Governor cut-in speed: The speed of the fuel injection pump at which the control rack just starts to move away from the maximum fuel step,…

Governor: A mechanical or electronic device to restrict the performance of an engine usually for reasons of safety.

Glow plug: An electrically heated device placed in the pre-combustion chamber of a diesel engine to assist in starting from cold.

Gear pump: Positive displacement pump using two meshing gears. Commonly used in engine lubrication system.

Gasket: A thin laminate sandwiched between two mating surfaces to improve sealing between them.

Fuel rail: Metallic or plastic pipes carrying fuel from the fuel injection pump to the fuel injectors.

Fuel injector: A component of the fuel injection system. Its function is to inject the fuel in the cylinder in properly atomized form of spray.

Fuel cell: A power source for the future automobiles. Fuel cells produce electricity through chemical reaction with no harmful exhaust emission.

Feeler gauge: A blade, usually metallic, of precisely predetermined thickness, used to measure the clearance between two parts.

Exhaust manifold: Set of pipes carrying exhaust gases from the cylinder head to the exhaust system.