A controller causes a clutch to transition from a half-engaged state to an engaged state when a difference in rotational velocity between input and output sides of the clutch falls within a predetermined range in the half-engaged state of the clutch. The controller executes a moving start control to increase an output rotational velocity of a prime mover and cause the clutch to transition to the engaged state when a predetermined first condition is satisfied in the half-engaged state of the clutch.

In a drive control system for a vehicle configured to cause the vehicle to travel in a limp-home mode when a malfunction occurs in a selectable one-way clutch, when it is determined that a malfunction occurs in the SOWC, the cause of the malfunction is specified as one of a plate-open failure of a selector plate that is unintentionally placed in an open state, and a sensor failure. In the case of the plate-open failure, a first limp-home traveling mode is carried out in which the vehicle travels in the limp-home mode while keeping the SOWC in a negative rotational speed range. In the case of the sensor failure, a second limp-home traveling mode is carried out in which the vehicle travels in the limp-home mode while the SOWC is placed in the non-engaged state.

Methods and systems for controlling torque of an electric machine that propels a vehicle when the vehicle is stopped are described. The methods and systems may be applied to synchronous and induction electric machines that are configured to propel a vehicle. The methods and systems may allow a consistent amount of torque to be delivered by an electric machine when vehicle speed and electric machine speed is zero.

Systems and methods for improving operation of a hybrid vehicle driveline are presented. In one example, pressures applied to two different clutches are coordinated such that a pressure boost phase of a driveline disconnect clutch does not occur at a same time as a pressure boost phase of a transmission shifting clutch.

A system and method for releasing baulking of a transmission gear of a hybrid vehicle are provided. The method includes comparing a stroke of a gear actuator with a first target value while increasing the stroke of the gear actuator when gear shifting is requested. Additionally, the method includes detecting whether the vehicle is in a stop state, in response to determining that the stroke of the gear actuator is less than a first target value. A motor torque is then increased in response to determining that the vehicle is in a stop state and the stroke of the clutch actuator is increased to be a second target value.

A power take-off (PTO) drive assembly for a transmission includes a shaft defining a shaft axis, a PTO gear defined radially about the shaft axis, and a clutch assembly positioned between the shaft and the PTO gear and having an engaged position and a disengaged position. When the clutch assembly is in the engaged position, torque is transferred from the shaft to the PTO gear. When the clutch assembly is in the disengaged position, torque is not transferred from the shaft to the PTO gear.

A method of regulating a vehicle drive-train in which actuation of an automatic starting element is regulated when starting the vehicle, and, during this regulation, monitoring a predetermined travel direction, reception of a brake release command and reception of a drive command. Furthermore, after receipt of the release command, the vehicle is held stationary, by a holding operation of the vehicle, until the drive command is received. If movement of the vehicle in a direction opposite to the predetermined travel direction is detected, actuation of the starting element is increased to a firmer engagement level. Once the driver releases the brake and until the drive command is received, if further movement of the vehicle, in the predetermined travel direction, is detected, then actuation of the starting element is decreased toward a lesser engagement level.

If a predicted compression-time in-cylinder temperature Tp having a positive correlation with the intensity of predicted pre-ignition is equal to or higher than a pre-ignition threshold value Tig when a request for automatic start is made, a forward/reverse switching mechanism is placed in a released state, and an engine is automatically started. If the predicted compression-time in-cylinder temperature Tp is lower than the pre-ignition threshold value Tig, the forward/reverse switching mechanism is placed in an engaged state, and the engine is automatically started.

A hybrid vehicle includes an engine, an electric machine, a disconnect clutch configured to selectively couple the engine to the electric machine, and a controller. The controller is programmed to, in response to a request to start the engine with the electric machine, command a target pressure to the disconnect clutch that depends on a seal friction derived from a measured line pressure of the disconnect clutch and a rate change of the measured line pressure.

A launch control method for a vehicle with a dry-type clutch includes: determining a target engine speed corresponding to an operation amount of an accelerator pedal of the vehicle when vehicle launch is started by operation of the accelerator pedal; calculating a feedforward component which is part of the torque to control the clutch using a rate of change over time of the target engine speed and a current engine torque; calculating a feedback component which is part of the torque to control the clutch based on a difference between the target engine speed and the current engine speed; calculating a compensation torque using a current engine torque and an estimated clutch torque which is estimated to be currently transferred by the clutch; and controlling a clutch actuator to drive the clutch with a sum of the feedforward component, the feedback component, and the compensation torque.