Based on positive experiences on agricultural tractors and other mobile working machines CVT-gearboxes may have a good chance to be installed in trucks too. There are various systems for a CVT possible. The planetary can be at the entry or at the exit of the transmission or at both ends. The differences between the systems and the advantages are explained. Depending on the various conditions of the operating time each system will have an advantage. On account of positive qualities of continuously variable transmissions (CVT) with respect to an engine-gearbox-management system and a potential of fuel saving and of the good experiences with hydrostatic-mechanical power split CVTs on agricultural tractors is discussed the effort to install these transmissions into light duty, medium size and heavy trucks and in busses. The advantages of CVTs for means of medium size and heavy trucks are evaluated. The gears constructed in this case as a proposition were further analyzed. As a result is shown, that a fuel saving economy - by automated running the engine in the optimal operating point and automated transmission ratio - of possible up to 25% is possible. The height of this fuel saving depends of course on the respective load collective to be expected and can even lead to an additional consumption in the most unfavourable case of too bad efficiency of the hydraulic components and/or maximal management required constantly. In addition, clear savings can be achieved in the major dimension and the heaviness of the gearbox.
Suggestion for a hydraulic-mechanic CVT-gearbox for a truck
Vorschlag für ein stufenloses hydrostatisch-mechanisches CVT-Getriebe für einen LKW
2006
12 Seiten, 15 Bilder, 12 Quellen
Conference paper
Storage medium
English
Suggestion for a Hydraulic-Mechanic CVT-Gearbox for a Truck
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