Touch point correction method for double clutch transmission
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorHo Young Lee
Life of this patent
Estimating the term…
Abstract
A touch point correction method includes determining respective temperatures of a first pressure plate, a second pressure plate, and a center plate and measuring an average temperature of the determined temperatures, determining rotational inertia based on the measured average temperature, determining a touch point correction amount based on the rotational inertia and engine speed of a vehicle, and correcting a touch point of a relevant clutch using the determined touch point correction amount.
Claims4
A touch point correction method for a Dual Clutch Transmission (DCT), comprising:
- a) determining, by a controller, respective temperatures of a first pressure plate, a second pressure plate, and a center plate and calculating an average temperature of the determined temperatures;
- b) determining, by the controller, a rotational inertia using a map in which relationships between average temperatures and rotational inertia values are previously stored based on the average temperature calculated at the a);
- c) determining, by the controller, a touch point correction amount using a preset map for changes in the rotational inertia based on the rotational inertia determined at the b) and engine speed of a vehicle;
- d) correcting, by the controller, a touch point of a relevant clutch using the touch point correction amount determined at the c);
- and
- e) controlling, by the controller, the relevant clutch using the touch point corrected at the d).
A touch point correction method for a Dual Clutch Transmission (DCT), comprising:
- a) determining by a controller, a correction amount depending on a temperature of one selected from a first pressure plate and a second pressure plate;
- b) determining by the controller, a rotational inertia using a preset map for changes in the rotational inertia depending on the temperature of the selected pressure plate;
- c) determining by the controller, a centrifugal force using a preset centrifugal force calculation means based on the rotational inertia of the selected pressure plate and a speed of an engine;
- d) determining by the controller, a correction amount based on the centrifugal force of the selected pressure plate;
- e) determining by the controller, a final touch point correction amount in consideration of the respective correction amounts determined at the a) and the d);
- f) correcting by the controller, a touch point of a relevant clutch using the final touch point correction amount determined at the e);
- and
- g) controlling, by the controller, the relevant clutch using the touch point corrected at the f).
Dependencies are inferred from the claim text.