ZF has developed a new automatic transmission for cars with eight speeds that can achieve more than 6% fuel savings. The priority aim in development, however, was not the maximum number of gears, but minimum consumption.
ZF engineers had set the bar high to produce a new benchmark for automatic car transmissions. The second generation of the ZF 6HP 6-speed transmission, that entered production only in 2006, defines standards that are hard to top: reaction times faster than human perception, direct engine linkage by early-stage torque converter lock-up and intelligent, adaptive control software, that almost reads the driver's intentions from his foot.
But the new transmission is capable of even more - it saves (even more) fuel. It also guarantees ultimate driving enjoyment, as well as the variability needed to be able to use future technologies.
How Torque Converters Work! (Animation)
The torque converter is often seen as the most complicated part in vehicles
of today. It is, however, a very important component of automatic
transmissions. This animation explains the theory behind this complex
1) Torque converter impeller
2) Blades and fluid of impeller
3) Centrifugal forces caused by rotation of impeller
4) Torque converter turbine
5) Fluid flow between impeller and turbine
6) Fluid coupling
7) Torque converter stator
8) Housing, lock-up clutch and shaft
9) Stages of operation: stall, acceleration, coupling
Manual Transmission Operation
Weber State University (WSU) - Automotive Technology Department -
Transmission Lab. This video demonstrates the operation of a typical
manual transmission. The information here applies to most manual
transmissions and transaxles. This particular transmission is a 1992 Toyota
Truck 5-speed Aisin R150 model. A version of this same transmission is used
in new vehicles today.
This video helps demonstrate part of the following NATEF Tasks:
A3.C.3 "Diagnose noise concerns through the application of
transmission/transaxle powerflow principles.", a priority 2 task.
A3.C.4 "Diagnose hard shifting and jumping out of gear concerns; determine
necessary action.", a priority 2 task.
We teach current vehicle technologies to our automotive students at Weber
State University and online. For more information visit:
This video was created and edited by John D. Kelly at WSU. For a full
biography, see http://www.weber.edu/automotive/John_Kelly.html
I apologize for the coughing during the video. I am not a smoker, I am not
sick, I just took a drink of water before shooting the video and got some
water down the wrong pipe. I was just trying to shoot a video for my