Allison Transmission
The Allison Transmission, Inc. is a U.S. manufacturer of transmissions and hybrid propulsion systems for commercial vehicles. The company is one of the world's leading manufacturers of fully automatic transmissions for trucks, buses, off-road and military vehicles.
On September 14, 1915 James A. Allison founded the " Indianapolis Speedway Team Corporation ". This resulted in the Allison Engine Company, which was bought in 1929 by General Motors. General Motors founded in 1946, the Allison Transmission. Milestones to 1970 were the first power shift for the Navy, powershift transmission for road vehicles, the angle drive for tracked vehicles, integrated hydraulic retarder, fully automatic transmissions for trucks and equipped with double turbine gear for transport vehicles.
In the 1970s, even components for the electric drive part of EMD locomotives were made by Allison Transmission. In the meantime, by 1987, the company was called "Detroit Diesel Allison ." Between 1980 and 1987 yielded 5,000 Allison X1100 - gears for the M1 and M1 Abrams tanks. It allows the acceleration of 65 tons of vehicle mass in seven seconds at 32 km / h and the delay through integrated brake system of 64 km / h to 0 km / h in four seconds. In February 2003, Allison Transmission fused with GM Powertrain. In June 2007, General Motors sold the company to the financial investors Carlyle Group and Onex Corporation.
In addition to the automatic transmissions with integrated braking system makes Alli Sion transmission also produces hybrid drive systems. For example, there is in the designated 18 Hybrid as Urbino buses Polish Solaris Bus & Coach built system consists of two electric motors, two synchronous couplings, three planet gears, two control modules for monitoring and control of the hybrid system and to coordinate the cooperation with other vehicle systems and a set on the roof -mounted 410 kg heavy nickel - metal hydride batteries, which store recovered braking energy and will not be charged externally. Their useful life is dependent on the operating conditions, about six years. Allison Transmission specifies for its bus - hybrid systems, the batteries are able to store so the whole of 50 mph, about 80 km / h to be recovered energy. How fast the delay may take place, is not specified. In addition, there are two oil-cooled for 75 kg converter modules for converting direct current into alternating current, and vice versa exist.