2/10/2012
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Company: AEM Electronics
www.aemelectronics.com
On-Vehicle Dyamometer
Measures Torque And RPM at the Vehicle Driveline While the Vehicle Is Being Driven
The AEM Dyno-Shaft is a true
on-vehicle dynamometer system that delivers Horsepower and Torque numbers as
accurately as the most respected dynamometers, with the major advantage being
that it measures power while the vehicle is under operation in real-world
conditions. It is not an accelerometer-based system, so it will not skew
readings due to uphill or downhill transitions, crosswinds, vehicle
aerodynamics, wheel spin, vehicle weight or the myriad other factors that can
affect the accuracy of GPS/accelerometer-based units. Instead, it measures a
vehicle’s actual transmitted Torque and speed at the driveshaft, allowing it to
record and output REAL Horsepower and Torque numbers.
HOW IT WORKS
AEM uses a set of laboratory-grade
strain gauges inside of a supplied slip yoke to measure Torque at the
driveshaft. Essentially, the Dyno-Shaft slip yoke becomes the sensor for
measuring driveshaft Torque. This is combined with a driveshaft speed sensor to
precisely measure the rotational speed of the yoke to determine RPM. The
combination of real Torque and RPM readings allows the Dyno-Shaft to output Torque
and Horsepower numbers as accurately as any dynamometer but in a more useful
setting, and eliminates all of the inaccuracies associated with accelerometer
based systems.
The data broadcast device (Controller)
for the Dyno-Shaft yoke is non-contact, does not have slip rings, does not
require batteries and is maintenance free. This Controller installs over the
transmission tail shaft housing and allows information from the Dyno-Shaft to
be transmitted via AEMnet (AEM’s CAN-bus communications network) to a data
logger, AEM or other programmable engine management system, or custom dashboard
via a single connection.
Eliminate Guesswork—Know for sure if slower times are due to a loss of power, vehicle set
up or driver error.
Engine tuning – Stop trying to approximate real world test conditions and start testing
in the real world! Finally you can test with actual intake air conditions,
actual vehicle loading and the hundred other things that make a real vehicle
behave very different than it does when on a dyno.
Chassis Set Up—Know
when the tires will break loose. Ideal for optimizing drag launches and
determining the longitudinal forces your tires can handle in road racing.
Torque Converter and Clutch development – Finally know what your Torque converter or clutch
is doing while you are making a pass!
Dyno It All—The
Dyno-Shaft accurately reads in all conditions including steady state, uphill or
downhill, even while coasting down!
Great for 2WD Diesel Rigs—Know exactly how much power it takes to get up a 5%
grade with a 20 MPH headwind and five tons hanging off the 5th
wheel. The Dyno-Shaft can also be used for engine/exhaust brake performance
during coast down.
For information, visit www.aemelectronics.com.