Editing Progressive shifting

{{More citations needed|date=November 2012}}
'''Progressive shifting''' is a technique for changing gears commonly practiced by [[driving|driver]]s of [[semi-trailer truck]]s. It is meant to reduce [[fuel]] consumption &mdash; something very important for drivers who travel several hundred miles each day.

Progressive shifting is accomplished by changing gears upward as early as possible when accelerating while staying within the flat torque range. Each shift will go a little higher into the RPM until the vehicle is in its top gear at cruising speed. After each shift is completed, the [[engine]] and [[transmission (mechanics)|transmission]] should be operating at or near the lowest [[Revolutions per minute|rpm]] speeds recommended by the manufacturers of those parts.

The fastest acceleration is achieved when the truck is receiving as close as possible to maximum [[Horsepower|power]] throughout the entire time it is accelerating. E.g. in a truck with a Caterpillar C15 engine, it is achieved by going all the way up to 1950RPM, then shifting to a gear that will put the engine at 1500RPM.

In contrast, using progressive shifting, i.e. maintaining maximum [[torque]], the overall acceleration is slower but there is increased [[fuel efficiency]] and lower wear of the engine due to lower RPM.

<references/>

==External links==
*{{cite web|last=Rutherford|first=Kevin|title=Drive better to save fuel|url=https://www.overdriveonline.com/drive-better-to-save-fuel |accessdate=19 March 2018}}
*{{cite AV media |title=Progressive Shifting for Commercial Trucks :: How to get better MPG for class 8 trucks |date=15 August 2012 |medium=Video |language=English |url=https://www.youtube.com/watch?v=eMfOyjlu0Qo  |archive-url=https://ghostarchive.org/varchive/youtube/20211212/eMfOyjlu0Qo| archive-date=2021-12-12 |url-status=live|access-date=19 March 2018}}{{cbignore}}

[[Category:Trucks]]