An abnormality determination device is applied to a vehicle provided with a transmission configured to transmit power by rotation of a shaft. The abnormality determination device includes a processor and a memory. The memory configured to store mapping data that is data that defines mapping learned by machine learning. The processor is configured to execute an acquisition process and a determination process. The acquisition process is a process of acquiring a variable indicating a time-series data of a rotation speed of the shaft and using the variable as a value of an input variable of the mapping. The determination process is a process of determining whether an abnormality has occurred in the transmission based on a value of the output variable acquired using the value of the input variable and the mapping.

A vehicle control device controls a vehicle control system, which includes a shift range switching system configured to switch a shift range by controlling a drive of a shift actuator, and an electric brake system configured to brake a vehicle by controlling a drive of a brake actuator. The vehicle control device includes a drive control unit, an abnormality monitoring unit, and a presence determination unit. The drive control unit controls a drive of a shift actuator. The abnormality monitoring unit monitors an abnormality of the shift range switching system. The presence determination unit determines whether the driver is in the driver's seat. When the abnormality of the range mismatch, which the actual shift range does not match the target shift range in a state where the driver is absent, the vehicle control device executes the fail safe process different from the fail safe process when the driver is present.

To provide such a shift apparatus that, even if, at the time of electrically applying a reaction force to a rotation operation of a shift apparatus, an abnormality occurs in a control device that provides an instruction to apply this reaction force, it is not enabled to switch to a range the operation of which is originally restricted. In a case where an abnormality occurs in reaction force application instruction means, reaction force application control means applies a reaction force against a rotation operation in a direction opposite to a parking range relative to a current range. Thereby, it is possible to reduce the possibility that a vehicle travels with an instruction to apply reaction force remaining in an abnormal state.

To provide a shift apparatus capable of preventing a vehicle from entering a different travel state even when a state in which a range position cannot be identified occurs due to the range position being set between ranges or due to a fault. A shift apparatus of a vehicle, the shift apparatus including: a shift member that is enabled to switch to any of a plurality of predetermined ranges by performing a rotation operation of a dial-type operation member; and range position detection means configured to detect a predetermined range position of the shift member; wherein, if a state in which the range position cannot be detected continues for a predetermined time or more, notification means is operated irrespective of the rotation operation.

A shift range switching system includes: a motor that includes motor windings and generates a cogging torque by a permanent magnet; drive circuits; an output shaft; a shift range switching mechanism that includes a trough providing member with troughs and crests and integrally rotates with the output shaft, an engagement member that fits in one trough corresponding to a shift range, and an urging member that urges the engagement member toward one trough; and a control unit with one calculation unit. The engagement member drops into one trough with an allowance. When an abnormality occurs in motor drive systems in an ascending action in which the engagement member moves from one trough toward one crest, the shift range switching systems avoids an occurrence of an intermediate range stop abnormality.

A control apparatus for a vehicle that includes an engine; a transmission; a damper and a clutch. The transmission has a gear ratio that is variable in a range including a torque-fluctuation insufficient absorption region in which a damper spring of the damper is elastically deformed to a certain maximum limit when a misfire occurs in the engine. The control apparatus includes: a misfire determination portion configured to determine occurrence of the misfire in the engine; and a misfire-case shift control portion configured, upon determination of the occurrence of the misfire in the engine by the misfire determination portion when the gear ratio of the transmission is in the torque-fluctuation insufficient absorption region, to cause the transmission to execute a shift-down action such that the gear ratio becomes higher than a higher threshold value of the torque-fluctuation insufficient absorption region.

A method of detecting a gear shift position of an electric shift-by-wire system is proposed. The method includes setting, as a reference position, a motor position at a time point when shift is completed to a target shift stage; rotating the motor until the motor no longer rotates in a P stage-engaging direction from the reference position; measuring a rotation amount of the motor with respect to the reference position; and determining the gear shift position by determining that the reference position is a P stage when the measured rotation amount of the motor is less than or equal to a predetermined first reference value, and the reference position is not the P stage when the measured rotation amount of the motor is greater than the first reference value.

A method for operating an electrically actuable feed pump in a hydraulic circuit, which draws in fluid from a fluid sump with a normal supplying of fluid. The fluid circulated in the hydraulic circuit can be returned back, and air is sucked in at least partially with an undersupply of fluid. The electric motor is integrated in a control circuit, which is provided with a control unit, which actuates the electric motor based on an actual rotational speed and a setpoint rotational speed with an actuation rotational speed. The evaluation unit compares the actual rotational speed to a reference rotational speed and in particular always with an identical current consumption. The evaluation unit then determines based on the comparison whether a fluid undersupply is present.

A method for controlling a motor vehicle having at least one park lock. A drive train of the motor vehicle has a drive motor, wheel, and a transmission. An operating element actuates the park lock, which can assume a blocking position, in which the park lock blocks the drive train and/or a part of the drive train, and a release position. After actuation of the operating element, the park lock is switched from the release position into the blocking position (or vice versa). Here, the speed of the motor vehicle is determined. After actuation of the operating element and if the park lock assumes the release position beforehand, it is checked whether the speed is greater than a predefined first threshold value. If this check was successful, a first warning signal is produced; and the switching of the park lock into the blocking position is performed.

A speed changing device includes a control unit (60) that: has a manual mode in which a clutch is engaged and disengaged by operating a clutch lever (4b) and an automatic mode in which the clutch is engaged and disengaged without the clutch lever (4b) being operated and is able to change a setting to the manual mode and the automatic mode; and is configured to signal mode misrecognition when it is determined that mode misrecognition has occurred.