A hybrid vehicle control method controls a hybrid vehicle. In this control method, a rotational speed command value for a power generation system is determined in accordance with a state of a drive system, a torque command value is determined for the power generation system such that the rotational speed of the power generation system reaches the rotational speed command value, a damping control is performed to suppress a characteristic vibration component generated in a connection between the engine and the power generator to calculate a final torque command value for the power generation system, and the torque command value is set as the final torque command value without performing the damping control upon determining a system resonance can occur that is caused by vibration of a component different from the characteristic vibration component.

A control device includes an internal combustion engine control unit configured to control an internal combustion engine. The internal combustion engine control unit is configured to, in a case where a first traveling mode, increase a rotational speed of the internal combustion engine in accordance with an increase in a speed of a vehicle and when the rotational speed reaches a predetermined first rotational speed, decrease the rotational speed to a second rotational speed lower than the first rotational speed, calculate a decrease rate of the rotational speed of the internal combustion engine per unit time when the rotational speed is decreased from the first rotational speed to the second rotational speed, and in a case where the traveling mode setting unit shifts from the first traveling mode to the second traveling mode, decrease the rotational speed of the internal combustion engine based on the decrease rate.

A diagnostic system of a vehicle for diagnosing a drive belt of a continuously variable transmission. A diagnostic circuit detects or predicts a fault of the drive belt based on an operating parameter received from a sensor associated with the vehicle during a predetermined diagnostic period.

An electronic control unit of a vehicle includes (a) a target operating point setting unit that calculates a request driving force requested for a vehicle, and set a target engine operating point through a slow change process for obtaining an engine output that slowly changes with respect to a request engine output implementing the request driving force, (b) a smoothing factor setting unit that changes a smoothing factor used for the slow change process according to an amount of change in a turbocharging pressure in the engine and sets the smoothing factor to a smaller value when the amount of change in the turbocharging pressure is smaller than when the amount of change in the turbocharging pressure is larger, and (c) a drive controller that controls the engine and the continuously variable transmission such that the engine operating point is the target engine operating point.

A launch control method for a vehicle may include a step of increasing clutch torque of a clutch according to a decrease in braking pressure, a step of maintaining a current level of the clutch torque for a first reference duration, a step of gradually reducing the clutch torque within a range which is lower than the first reference torque level and is equal to or greater than a second reference torque level which is lower than the first reference torque level, a step of gradually increasing the clutch torque until the clutch torque reaches a third reference torque level which is higher than the first reference torque level, and a step of bringing the control to a stop when a state in which a clutch slip is less than a predetermined critical synchronous slip is maintained for a predetermined critical synchronization duration or longer than the predetermined critical synchronization duration.

An engine misfire detection device is mounted on a hybrid electric vehicle that includes an internal combustion engine and a generator. The internal combustion engine has a plurality of cylinders and a crankshaft and is dedicated to power generation. The generator is connected to the crankshaft via a torsional damper. The engine misfire detection device includes a generator rotation angle sensor and a processor. The generator rotation angle sensor detects the rotation angle of the generator rotating shaft. The processor is configured to execute a misfire detection process. The misfire detection process includes a first misfire detection process of determining that the internal combustion engine has misfired when an amplitude correlation value that correlates with the magnitude of amplitude of rotation speed of the generator rotating shaft and is detected by the generator rotation angle sensor is greater than a determination threshold value.

A hybrid vehicle includes a connecting/disconnecting clutch disposed between an engine and an electric motor, an automatic transmission including an input clutch, a starting clutch disposed between the electric motor and the automatic transmission, and a control apparatus for executing an engine-start control operation for starting the engine, by igniting the engine after increasing a rotational speed of the engine by a torque of the electric motor while placing the connecting/disconnecting clutch into an engaged state. In process of the engine-start control operation that is executed when the hybrid vehicle is in a stopped state with the starting clutch being in a released state, the control apparatus places the input clutch in an engaged state until the rotational speed of the engine exceeds a predetermined speed value, and switches the input clutch to a released state after the rotational speed of the engine has exceeded the predetermined speed value.

A shift range control device switches a shift range by controlling the drive of a motor. An angle calculation unit calculates a motor angle based on a motor rotation angle signal acquired from a motor rotation angle sensor detecting a rotational position of the motor. An acceleration calculation unit calculates a motor acceleration based on the motor angle. A moving average calculation unit calculates an acceleration moving average value as a moving average of at least one of a predetermined electrical angle cycle and a predetermined mechanical angle cycle of the motor acceleration. A drive control unit adopts the acceleration moving average value to control the drive of the motor such that the motor angle becomes a target motor angle value corresponding to a target shift range.

A method for adapting an engagement point of a disconnect clutch that can be moved between at least one engaged state, in which an output shaft of an internal combustion engine for propelling a vehicle is coupled by way of the disconnect clutch to a rotor of an electric machine for propelling the vehicle, and at least one disengaged state, in which the output shaft is decoupled from the rotor.

A method for adapting an engagement point of a disconnect clutch that can be moved between at least one engaged state, in which an output shaft of an internal combustion engine for propelling a vehicle is coupled by way of the disconnect clutch to a rotor of an electric machine for propelling the vehicle, and at least one disengaged state, in which the output shaft is decoupled from the rotor.