Navistar MaxxForce DT Diagnostic Manual page 191

Fuel Rail Pressure (FRP)
The amount of pressure in the fuel rail.
Fuel Rail Pressure (FRP)
sensor
A variable capacitance sensor that monitors fuel pressure in the fuel rail and sends a signal to the ECM.
Fuel strainer
A pre-filter in the fuel system that keeps larger contaminants from entering the fuel system.
Fuel Volume Control Valve
(FVCV)
The FVCV regulates the volume of flow sent to the HPFP. The FVCV allows a sufficient quantity of fuel
to be delivered to the HPFP depending on engine load, speed, injector quantity, fuel temperature, and
number of injections per cycle.
Fully equipped engine
A fully equipped engine is an engine equipped with only those accessories necessary to perform its intended
service. A fully equipped engine does not include components that are used to power auxiliary systems. If
these components are integral with the engine or, for any reason are included on the test engine, the power
absorbed may be determined and added to the net brake power. (SAE J1995 JUN90)
Fusible link (fuse link)
A fusible link is a special section of low tension cable designed to open the circuit when subjected to an
extreme current overload. (SAE J1156 APR86)
Gross Combined Weight Rating
(GCWR)
Maximum combined weight of towing vehicle (including passengers and cargo) and the trailer. The GCWR
indicates the maximum loaded weight that the vehicle is allowed to tow.
Gross brake horsepower
The power of a complete basic engine, with air cleaner, without fan, and alternator, and air compressor
not charging.
Hall effect
The development of a transverse electric potential gradient in a current-carrying conductor or semiconductor
when a magnetic field is applied.
Hall effect sensor
Transducer that varies its output voltage in response to changes in a magnetic field. Commonly used to
time the speed of wheels and shafts.
High-pressure Fuel Pump
(HPFP) assembly
The HPFP is a volumetric pump that supplies fuel at high-pressure. The HPFP is mounted in the rear valley
on the top of the engine and is driven by the camshaft.
High-pressure Piezo Common
Rail (HPCR)
The HPFP pumps fuel through separate tubes to each fuel rail. Each fuel rail has four fuel tubes, one for
each injector, that maintain constant pressure from the high-pressure pump to each injector.
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DIAGNOSTIC MANUAL
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