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US 8,677,847 B2Granted
7-speed transmission
AssigneeAutomobili Lamborghini S.P.A.
InventorsRoberto Diani, Paolo Neri, Fabio Belletti
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AssigneeAutomobili Lamborghini S.P.A.
InventorsRoberto Diani, Paolo Neri, Fabio Belletti
Estimating the term…
A 7-speed transmission for a motor vehicle, in particular for a sports car, includes an input or primary shaft, an output or secondary shaft, a first, a second, a third, a fourth, a fifth, a sixth and a seventh forward speed, as well as a reverse speed. In order to obtain a compact constructional design with a small transversal size and allow a sporty drive mode in the upshift from the first to the sixth speed, in which the shift process occur in an overlapping manner and almost without any interruption of the drive force, the eight speeds are combined in pairs into four shift groups, two of the four shift groups are arranged on the input or primary shaft and two on the output or secondary shaft, respectively, and at least between the first speed and the sixth speed adjacent speeds are arranged in different shift groups.
A 7-speed transmission for a motor vehicle, comprising a primary shaft, a secondary shaft, first, second third, fourth, fifth, sixth and seventh forward speeds and a reverse speed to establish eight speeds which are combined in pairs into four shift groups, with the speeds of said pairs sharing a common shift device, and with two of the four shift groups being arranged on the primary shaft and the two other of the four shift groups being arranged on the secondary shaft, wherein at least between the first speed and the sixth speed adjacent speeds are arranged in different shift groups, wherein a first shift group comprises the reverse speed and the first speed, a second shift group comprises the second speed and the fourth speed, a third shift group comprises the third speed and the fifth speed, and a fourth shift group comprises the sixth speed and the seven the speed, wherein the first and second shift groups are arranged on the secondary shaft, and the third and fourth shift groups are arranged on the primary shaft.
Dependencies are inferred from the claim text.