A vehicle control apparatus is applied to a vehicle including an engine as traveling drive source and a clutch device in a power transmission path connected to an output shaft of the engine. The vehicle control apparatus causes the vehicle to be in a coasting state by reducing power transmitted in the path by clutch device operation upon satisfaction of a predetermined implementation condition, and cancels coasting state by clutch device operation upon satisfaction of a predetermined coasting cancellation condition including at least an accelerator condition during coasting. The vehicle control apparatus includes a travel determination section determining coasting state of the vehicle, and a clutch control section performing half-clutch control during coasting at least at one of at the beginning of coasting and immediately before coasting is cancelled, the half-clutch control setting a degree of clutch device engagement to an intermediate degree.

A slip factor learning method of a dual clutch transmission (DCT) may include: determining, by a control unit, whether the DCT is up-shifted or down-shifted; comparing an engine speed to a shift start reference speed, and determining whether the engine speed enters an actual gear shifting period or actual gear shifting is completed, in response to the determined type of the gear shifting; comparing a magnitude of an engine torque to a magnitude of a clutch torque at a point of time that the engine speed enters the actual gear shifting period or the actual gear shifting is completed; and learning a slip factor at the point of time that the engine speed enters the actual gear shifting period or the actual gear shifting is completed, based on the magnitude comparison result between the engine torque and the clutch torque.

A device for controlling an engine clutch in an environmentally-friendly vehicle, wherein the engine clutch is disposed between an engine and a driving motor and is configured to selectively connect the engine to the driving motor, includes: a transmission configured to receive a driving force that is transmitted from at least one of the engine and the driving motor by release or engagement of the engine clutch; and a controller configured to control the engine clutch based on a gear of the transmission when the failure of the engine clutch is detected and configured to charge a battery using the engine.

A work vehicle includes a target speed setting unit configured to set a desired target speed, a travel speed detecting unit configured to detect a travel speed of a vehicle body, an engine, a work implement attached to the vehicle body and driven by an output of the engine, a travel device, a brake disposed between the travel device and the engine and configured to brake the travel device, a clutch disposed between the engine and the brake and configured to transmit or interrupt power from the engine to the travel device, and a controller configured to reduce a difference between the travel speed and the target speed by controlling an engagement pressure of the clutch and an engagement pressure of the brake.

A hybrid drive including a first drive motor coupled by a clutch to a shaft, and a second drive motor coupled rigidly to the shaft. A method for determining the temperature of the clutch in the hybrid drive includes the steps of: determining a temperature of the clutch; determining a temperature of the clutch housing; determining the temperature difference between the clutch and the clutch housing; determining the heat conductivity between the clutch and the clutch housing, wherein the heat conductivity is determined as a function of the rotational speed of the first drive motor and the rotational speed of the second drive motor; determining the heat flow between the clutch and the clutch housing on the basis of the product of the heat conductivity and the temperature difference; and adjusting the ascertained clutch temperature on the basis of the ascertained heat flow.

A control apparatus for a vehicular drive unit is provided. The vehicular drive unit includes a continuously variable transmission, and a clutch. The control apparatus includes an electronic control unit that is configured to acquire an oil temperature of hydraulic oil for controlling the continuously variable transmission and the clutch, and control the clutch such that a torque capacity of the clutch becomes smaller than a torque capacity that is set in a case where an oil temperature of the hydraulic oil is higher than a predetermined oil temperature, when the oil temperature is equal to or lower than the predetermined oil temperature, or control the continuously variable transmission such that a speed ratio of the continuously variable transmission becomes equal to or larger than a lower limit set in advance when the oil temperature of the hydraulic oil is equal to or lower than the predetermined oil temperature.

A vehicle is provided that includes a motor connected to vehicle wheels and configured to generate electrical power. A first rotational speed detector detects rotational speed of the motor and an engine generates mechanical power. A second rotational speed detector detects rotational speed of the engine. A clutch is disposed between the engine and the motor to open and close the connection between the engine and the motor. A controller diagnoses a failure of the clutch and outputs an instruction to open the clutch and an instruction to turn off the engine when the clutch has a failure. The controller determines whether the clutch is successfully opened based on the detected rotational speed of the motor and the detected rotational speed of the engine, executes a series driving mode when that the clutch is successfully opened and speed limit driving when that the clutch has failed to be opened.

A control method for a vehicle with a DCT may include: a sensing step in which a controller senses a currently engaged gear of the vehicle, an inclination of a road, and a vehicle speed; a comparing step in which the controller compares a temperature of an odd-numbered clutch of the transmission with a set temperature when the currently engaged gear is a first gear, the inclination of the road is within a set range, and the vehicle speed is a set vehicle speed or less, after the sensing step; and an adjusting step in which the controller adjusts a shifting pattern to shift into a second gear when the temperature of the odd-numbered clutch is the set temperature or more, as the result of the comparing step.

A control method of a vehicle includes executing one of a plurality of clutch protection logics according to estimated clutch temperatures by a controller. A control constant is counted according to the executed clutch protection logic by the controller. At least one of a shift pattern and an engine revolutions per minute (RPM) are adjusted based on the counted control constant.

A control device for a vehicle includes an electronic control unit configured to control release of a predetermined engaging device configured to selectively engage a rotating member of a loaded part that participates in power transmission in a predetermined gear stage among a plurality of engaging devices with a rotating member of a non-loaded part that does not participate in the power transmission in the predetermined gear stage, at the time of selection of the predetermined gear stage of a stepped transmission, and control the predetermined engaging device such that an engagement pressure for bringing the predetermined engaging device into a weak slip state in a range that does not affect the selection of the predetermined gear stage is added, at the time of the selection of the predetermined gear stage and in a predetermined operational state.