Heath, R. and Child, A., "Zeroshift. A Seamless Automated Manual Transmission (AMT)With No Torque Interrupt," SAE Technical Paper 2007-01-1307, 2007, doi:10.4271/2007-01-1307.
Zeroshift technology allows a manual transmission to change gear in zero time. The Zeroshift automated manual transmission (AMT) is easy to manufacture and allows a cost effective alternative to the traditional torque converter based automatic transmission. Zeroshift offers potential fuel economy improvements from driveline efficiency and the best possible vehicle acceleration. Compared to an existing AMT, Zeroshift offers an uninterrupted torque path from the engine to vehicle which allows for a seamless gearshift. This paper provides an introduction to the technology together with test data from a demonstrator vehicle.