172 Glossary
Idler Tensioner
A belt tensioning device designed to maintain optimum tension under varying engine
speeds and load.
Oxides of Nitrogen (NOx)
High temperatures and pressures of combustion produce oxides of nitrogen (NOx).
When combustion temperature exceeds 1372°C (2,500°F), oxygen and nitrogen
combine in large quantities to form NOx. By themselves, NOx emissions are no
great hazard; however, when mixed with the right amount of HC in the air, NOx will
combine in the presence of sunlight to form smog.
Passive Regeneration
Cleaning a particulate filter by spontaneous burning of soot that collects on it. The
exhaust temperature remains continuously high enough to incinerate the soot.
Poly-V Belt
A multi-ribbed belt design incorporated into the accessory drive belt and pulley
arrangement at the front of the engine.
Regeneration
Cleaning a diesel particulate filter so as to renew its capacity to function efficiently.
Roller Follower
A type of rocker arm with an axle-mounted roller that rides on (or follows) a camshaft
lobe. The rolling motion of this design provides increased load capacity with less
friction than the flat-faced rocker arm design. Roller followers provide the rocker arm
lifting action for the electronic unit injector, intake and exhaust valves and exhaust
brake.
Summary of Contents for EPA2007 D13F
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Page 35: ...SPECIFICATIONS 29 Bearing Cap Camshaft Rocker Arm Shaft T2022796 ...
Page 101: ...ENGINE COMPONENT AND LOCATION 95 Fuel System W2033327 ...
Page 134: ...128 ENGINE COMPONENT AND LOCATION Rear Engine Components W2032470 ...
Page 136: ...130 ENGINE COMPONENT AND LOCATION Oil Pan and Stiffing Frame W2032451 ...
Page 138: ...132 ENGINE COMPONENT AND LOCATION Lower Engine Components W2032471 ...
Page 140: ...134 ENGINE COMPONENT AND LOCATION Replacement Kits Engine Replacement Kits W2032452 ...