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AssigneeZF Friedrichshafen AG
InventorsDieter Fischer, Klaus Späth
Estimating the term…
A gearshifting unit for a vehicle transmission (6) comprising a main transmission part (10) manually shifted by the vehicle driver using a gearshift lever (16) and one range change group transmission (14) shifted by valves (44, 46). The gearshifts are manually preselectable by the vehicle driver using a gearshift lever (16), the same as a power assistance device (74) for shifting the gear steps in the main transmission part (10) and one electronic control device (20) which actuates the valves (44, 46). In a method for reducing the power assistance, a neutral position is detected in the manually shifting main transmission part (10) and once the neutral position is determined, the gearshift begins in the range change group transmission part (14) and the power assistance is engaged with a delay.
A method for reducing power assistance on a gearshifting unit during shifting of a vehicle transmission (6) comprising a main transmission part (10), which is manually shifted by a vehicle driver using a gearshift lever (16), a range change group transmission (14) which is shifted by valves (44, 46) such that gearshifts of the range change group transmission (14) being manually preselectable by the vehicle driver via one or more switches (22, 24) located on the gearshift lever (16), a power assistance device (74) for aiding in the shifting of gear steps in the main transmission part (10) and an electronic control device (20) which actuates the valves (44, 46), the method comprising the steps of:
Dependencies are inferred from the claim text.