Vehicle with a dual clutch transmission
OwnerLutz GUNDLACH, Pina Michaela WRITZELinventors
Life of this patent
Estimating the term…
Abstract
A vehicle is disclosed, and may include a dual clutch transmission, a first sub-transmission and a second sub-transmission of which may be activated by actuating respective first and second separating clutches. A time period for preparing the subsequent gear shift may comprise a separating clutch opening process and a gear engagement process. In order to reduce the preparation time period, the evaluation module may actuate a shift control unit such that the gear engagement process starts before completion of the separating clutch opening process, such that the separating clutch opening process and the gear engagement process temporally overlap in an overlap time interval.
Claims15
A vehicle comprising:
- a dual clutch transmission including:
- a first sub-transmission configured to be activated by actuation of a first separating clutch;
- and
- a second sub-transmission configured to be activated by actuation of a second separating clutch;
- a shift control unit;
- an evaluation module configured to detect, in advance of a gear engagement process, whether the second separating clutch is closed;
- and
- a clutch control unit,
- wherein each of the first and second sub-transmissions has at least one gear shift element configured to engage a gear,
- wherein the shift control unit is configured to conduct a gear shift in which a target gear is engaged by the gear shift element during driving operation,
- wherein the shift control unit is configured to engage the target gear in the second sub-transmission in preparation for the gear shift in a gear engagement process,
- wherein when the evaluation module detects that the second separating clutch of the second sub-transmission is closed before the gear engagement process, the evaluation module is configured to actuate the clutch control unit to fully open the second separating clutch in a separating clutch opening process, such that a torque-free engagement of the target gear by a respective gear shift element occurs,
- wherein the preparation of the gear shift includes the separating clutch opening process and the gear engagement process, and
- wherein the evaluation module is configured to actuate the shift control unit such that the gear engagement process begins before completion of the separating clutch opening process, such that the separating clutch opening process and the gear engagement process temporally overlap in an overlap time interval.
A method for engaging a target gear in a dual clutch transmission of a vehicle, the method comprising:
- engaging the target gear in the second sub-transmission by a shift control unit in a gear engagement process;
- and
- detecting whether the second separating clutch of the second sub-transmission is closed before the gear engagement process by the evaluation module, and when the evaluation module detects the second separating clutch is closed, actuating the clutch control unit to fully open the second separating clutch in a separating clutch opening process, such that a torque-free engagement of the target gear by a respective gear shift element occurs,
- wherein the shift control unit is actuated such that the gear engagement process begins before completion of the separating clutch opening process, such that the separating clutch opening process and the gear engagement process temporally overlap in an overlap time interval.
Dependencies are inferred from the claim text.