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Noise, vibration, and harshness (NVH), also known as noise and vibration (N&V), is the study and modification of the noise and vibration characteristics of vehicles, particularly cars and trucks. While noise and vibration can be readily measured, harshness is a subjective quality, and is measured either via jury evaluations, or with analytical ...
Increasing air drag with the speed on the road manifests as increasing braking force of the vehicle wheels. The aim is to make the vehicle on the dynamometer accelerate and decelerate the same way as on a real road. First you need to know the parameters of the "behavior" of the vehicle on a real road.
A series of trucks based on commercial truck models with minimal modifications to make them suitable for military service, they include M915 series of 14-ton 6x4 semi-tractors built by AM General and later Freightliner, the M916 20-ton 6x6 semi-tractors built by Freightliner, the M917 dump trucks initially Freightliner 18.5-ton 8x6 vehicles and ...
Roadway noise is the collective sound energy emanating from motor vehicles. It consists chiefly of road surface, tire, engine/transmission, aerodynamic, and braking elements. Noise of rolling tires driving on pavement is found to be the biggest contributor of highway noise and increases with higher vehicle speeds. [1] [2] [3]
The Ford LCF (Low Cab Forward [1]) is a medium-duty cab-over truck that was marketed by Ford Motor Company from 2006 to 2009. The first cab-over (COE) vehicle sold by Ford since the company sold the rights to the Ford Cargo design (in North America) to Freightliner in 1996, the LCF was developed as a Class 4/5 truck, competing in a market segment dominated by the Isuzu NPR (and its rebadged ...
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For four-wheeled vehicles (and by extension, vehicles with six, eight, or more wheels), this term is used to describe vehicles that are able to power at most two wheels, referred to as either front, or rear-wheel-drive. The term 4x2 is also used, to denote four total wheels with two being driven. Most road vehicles use a 2WD layout due to its ...
Workplace driving in the U.S. takes place in two distinct settings: the U.S. Department of Transportation (DOT) regulatory regime that covers large trucks and buses, and the unregulated operation of lighter-weight fleet or personal vehicles driven for work purposes. Regulations to promote safe operation of large trucks and buses have been part ...
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