a*****e
发帖数: 4936 | 1 什么区别啊，能请牛人深入浅出的给解释一下吗？
还有awd和4 wheel drive什么区别？
xiexie:)! | r********e
发帖数: 249 | | c*********k
发帖数: 20696 | 3 两者之间
【在 r********e 的大作中提到】
: Tiguan 4 motion算假四驱么？
| c********s
发帖数: 1024 | 4 Awd is realtime four wheel driven,four wheel all the time
4wd is four wheel only on demand | h*****e
发帖数: 1153 | | s********3
发帖数: 3476 | 6 What is the difference between Full time Four Wheel Drive (4WD) All Wheel
Drive (AWD) and automatic All Wheel Drive (auto AWD)?
Full time 4WD, also called permanent 4WD, (not to be confused with: part
time 4WD ) is a system that powers all four wheels at all times and it can
be used full time on all surfaces including pavement. The additional feature
of a differential incorporated into the transfer case makes it possible to
use 4WD all the time.
2WD is not available (only part time 4WD offers that option). Each tire
creates about 25% of the available torque when the ground is level with a
uniform surface. Driver has a choice of a "4-high" - 4H (that's your every
day setting) and "4-low" - 4L.
Full time 4WD vehicles work very well on-road and are very capable off-road.
When "4-low" is selected the wheels create substantially more torque (on a
Grand Cherokee its 2.72 times more) than in "4-high" - at the same time the
vehicle moves at substantially slower speeds (2.72 times slower on a Jeep
Grand Cherokee).
Important: "4-low" does not create more traction - it creates more torque at
slower speeds and that can be detrimental when the ground is slippery.
Slipping tires are more likely in "low" than in "high"! On snowy, icy roads
"low" would be a bad choice - some really deep snow, however, puts up so
much resistance that "low" is needed to push forward. You see, using 4WD is
not an easy task.
The low setting is an advantage for drivers who need to tow and maneuver a
heavy trailer etc. and for drivers who at one point or another may want to
negotiate difficult off-road terrain, when more torque and/or slower speed
is needed.
All wheel drive (AWD) is almost the same thing as full time 4WD - it is a
system that powers all four wheels of a vehicle at all times as well. It can
be used full time on all surfaces including pavement like full time 4WD.
Difference to full time 4WD is that a "4-low" setting is not available in
AWD cars. Due to the lack of "low range", AWD vehicles are much less capable
in off-road settings than full time 4WD vehicles, but work perfectly well
on-road. | s********3
发帖数: 3476 | | d***s
发帖数: 7683 | |
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