EMA also included the test results from the severe duty trucks to form its recommended test criteria for an alternate
roll stability test.
In
its roll stability test development, the agency had considered lateral acceleration and forward speed as possible roll stability performance metrics.
We included both maneuvers in
our roll stability testing.
Not exact matches
For the needs of outdoor enthusiasts,
testing involves using a custom - built slide - in camper simulator to
test the truck's
roll stability when its center of gravity is raised.
The agency's
test program was able to develop
test parameters for the SWD maneuver so that both
roll stability and yaw
stability could be evaluated using a single loading condition and
test maneuver.
The vehicle must be able to meet the
roll stability Start Printed Page 36079performance criteria discussed below at any speed between 48 km / h (30 mph) and the maximum
test speed.
Daimler, Meritor WABCO, HDMA, EMA, and Bendix supported adopting EMA's J - turn
test maneuver as the performance
test requirement for
testing roll stability.
Because the SWD
test does not
test roll stability on light vehicles, EMA reasoned that the maneuver should not be used to
test roll stability on heavy vehicles.
EMA submitted a comment including general
test conditions for a J - turn maneuver to
test roll stability and a single lane change on a wet surface to
test yaw
stability.
After considering the public comments and conducting additional track
testing, we have determined that a 150 - foot - radius J - turn
test maneuver is an efficient means to ensure vehicles maintain
roll stability.
However, in FMVSS No. 126, NHTSA stated that the maneuver was only used to
test yaw
stability, not
roll stability.
The J - turn
test will be used to evaluate the
roll stability of a vehicle.
The soak
test will be
rolled out for select users to check the
stability of the device when the small update
rolls out.
Even after three rounds of public beta
tests, the Essential Phone's Android 8.0 Oreo update is not free of «
stability issues», so 8.1 will ultimately be
rolled out instead.