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Twin clutch manual gearbox

  • US 20060174722A1
  • Filed: 03/21/2005
  • Published: 08/10/2006
  • Est. Priority Date: 03/22/2004
  • Status: Active Grant
First Claim
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1. A twin-clutch manual gearbox for an engine, the gearbox including:

  • a first input shaft and a second input shaft to which engine rotation is selectively input via individual clutches, the second input shaft being rotatably fitted onto the first input shaft so that the first input shaft protrudes from a rearward end of the second input shaft farthest from the engine, first gearsets associated with a first gearbox speed grouping, the first gearsets being located between the rearward end of the protruding first input shaft and a layshaft located substantially parallel to the first and second input shafts such that appropriate transmission is enabled for respective ones of the first gearsets, second gearsets associated with a second gearbox speed grouping, the second gearsets being located between the second input shaft and the layshaft such that appropriate transmission is enabled for respective ones of the second gearsets, whereby rotation according to a selected gear after a gearchange is output in an axial direction from a rearward end of the first input shaft or of the layshaft, the twin-clutch manual gearbox being characterized in that the second gearsets are positioned such that the gearset associated with the lowest gearbox speed of the second gearbox speed grouping capable of providing a bearing retaining space between the first input shaft and the second input shaft is positioned so as to be farthest from the engine, and the gearset associated with the highest gearbox speed of the remaining gearbox speeds of the second gearbox speed grouping is positioned so as to be closest to the engine.

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