Allison releases details of its new M6620 transmission which offers operational improvement for special fire and airport crash trucks
Leipzig, Germany – Allison has announced details of its new M6620 fully automatic transmission at the Interschutz trade show for rescue and civil security services. A raft of enhancements for Allison’s 6000 Series has led the leading producer of commercial duty, fully automatic transmissions to release a new M6620 transmission. New software and hardware upgrades for the transmission typically found in high performance crash, fire, and rescue applications, will enhance durability, lower operating costs and simplify maintenance. For specialty fire equipment often used at airports, the opportunity to “tune” the transmission to an operator’s specific requirements is now possible, permitting optimum acceleration even in off-road conditions such as traversing an airfield to reach a stricken aircraft. “For ultra high performance applications, Allison can increase the shift points to keep the engine at peak torque, to maximize acceleration,” says Manlio Alvaro, Allison’s European marketing manager. The greater use of digital control for engines delivers sharper torque “response” through the driveline, necessitating upgrades to protect the drivetrain. “We have made detail improvements throughout the product to further extend overhaul intervals and increase durability,” adds Brian Reusser, Allison’s off-highway product manager. “These include design, manufacturing and material upgrades.” For the flywheel, the use of Finite Element Analysis identified an opportunity to modify fillet radii, introduce heat treatment and reduce stress. Case hardening and nitriding other interfacing components such as the turbine shaft and hub, together with increasing the shaft’s diameter, is expected to increase their fatigue durability by over six times. Extensive comparative testing has identified a significantly more durable bronze-based material for use in the lock up clutch. A new CEC3 electronic control system that includes an extended CAN messaging set (J1939 protocol) and other electrical interface upgrades will soon be featured on the M6620. Manufacturers will benefit from an easier and higher level of integration with the vehicle architecture. Trusted to be relied upon in emergency situations Allison is renowned in the emergency sector. OEMs producing airport crash trucks around the world depend on the particular combination of durability, reliability and performance that an Allison fully automatic transmission can deliver. - ends - About Allison Transmission, Inc. Allison Transmission, Inc. (Allison) is the premier global provider of commercial duty automatic transmissions and hybrid propulsion systems. Allison products are specified by over 250 of the world’s leading vehicle manufacturers and are used in many market sectors including bus, refuse, fire, construction, distribution, military and specialty applications. Founded in 1915, the Allison business is headquartered in Indianapolis, Indiana, U.S.A. and employs approximately 2,900 people. Regional headquarters with dedicated support staff are located in China, The Netherlands, Brazil, India and Japan. With a global presence in 80 countries, Allison has over 1,550 distributor and dealer locations. More information about Allison is available at www.allisontransmission.com. ### Press Contacts Propel Technology Contact : Claire Dumbreck Bloxham Mill, Barford Road Bloxham, OX15 4FF Tél. : +44 1295 724130 claire@propel-technology.com
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