Method for automatically assessing performance of a driver (110) of a vehicle (100) for a particular trip, wherein current driving data sets, comprising basic driving data are repeatedly read from the vehicle, which method comprises the steps a) collecting previous-trip driving data sets, comprising instantaneous vehicle energy consumption and instantaneous vehicle velocity, for different previous trips, different drivers and different vehicles; b) for a plurality of said previous-trip datasets, calculating a respective relative instantaneous vehicle energy consumption value; c) calculating a characteristic vehicle relative energy consumption function; and d) calculating a value of a trip performance parameter based upon a weighted average value of the respective relative instantaneous energy consumptions for previous-trip data sets that correspond to each of said current-trip data sets, which weighting is performed using said characteristic vehicle relative energy consumption function. The invention also relates to a system.

A motor vehicle having a braking device and drive engine which can be used independently of one another for decelerating the vehicle. A method of controlling the vehicle during a thrust operation includes steps of detecting a requirement to change a currently engaged first gear in a transmission that transfers the braking force from the engine; determining a first deceleration brought about by the engine in the first gear; determining a second deceleration brought about by the engine in a second gear to be engaged; and changing the gear by disengaging a clutch that couples the engine to the transmission, the first gear is disengaged, the second gear is engaged, and the clutch is again engaged. In this case, the braking device is controlled, during the gear change, in such manner that any jerk experienced by the vehicle is below a predetermined value.

A rough road determination device (100) is mounted on a vehicle (1) that is equipped with an internal combustion engine (10) having a crank angle sensor (31). This rough road determination device is equipped with determination means (20) for determining whether or not a road on which the vehicle travels is a rough road, by comparing a first amplitude fluctuation amount as an amplitude fluctuation amount of one pulse of an output of the crank angle sensor, which is determined in advance on the basis of a rotational speed of the internal combustion engine, with a second amplitude fluctuation amount as an amplitude fluctuation amount of one pulse that is actually output from the crank angle sensor.

Method for automatically assessing performance of a driver (110) of a vehicle (100) for a particular trip, wherein current driving data sets, comprising basic driving data are repeatedly read from the vehicle, which method comprises the steps a) collecting previous-trip driving data sets, comprising instantaneous vehicle energy consumption, for different previous trips, different drivers and different vehicles; b) for each of said current-trip driving data sets, selecting a corresponding previous-trip data set; c) calculating the value of said second trip performance parameter based upon the respective values of a first trip performance parameter for each of said selected previous-trip driving data sets, which first trip performance parameter is calculated for the previous-trip data set in question as a relative trip performance of the previous-trip data set in question in relation to the trip during which the previous-trip data set was observed. The invention also relates to a system.

A method for controlling wheel slip of a vehicle includes obtaining operation state information of a driving system, determining the speed of a backlash component between a drive apparatus and a drive wheel of the vehicle based on the obtained operation state information of the driving system, determining a reference speed for controlling wheel slip, determining a control input value for controlling the wheel slip based on a driving system speed, the speed of the backlash component, and the reference speed, using the control input value to determine whether wheel slip occurs, determining a torque correction amount based on the control input value when it is determined that wheel slip has occurred, and correcting a torque command of the drive apparatus according to the torque correction amount.

A control device of a vehicle including a multi-speed transmission having gear positions switched by executing release of a release-side engagement device out of a plurality of engagement devices and engagement of an engagement-side engagement device out of the plurality of engagement devices, and an engine of which a power is transmitted through the multi-speed transmission to drive wheels, the control device performing a shift of the multi-speed transmission by using a predefined shift model for determining control operation amounts of a torque at an input rotating member of the multi-speed transmission, a torque capacity of the release-side engagement device, and a torque capacity of the engagement-side engagement device, the control operation amounts achieving shift target values that are a target value of a torque at an output rotating member of the multi-speed transmission and a target value of angular acceleration of the input rotating member of the multi-speed transmission, the control device comprising: a condition setting portion setting a condition necessary for determining the control operation amounts using the shift model such that during a downshift performed during deceleration running associated with accelerator-off state, an output torque of the engine is raised with the release-side engagement device released so as to increase a rotation speed of the input rotating member of the multi-speed transmission toward a synchronous rotation speed after the downshift and such that the engagement-side engagement device is then engaged; and a shift target value setting portion setting the target value of the torque at the output rotating member of the multi-speed transmission during the downshift such that the torque at the output rotating member of the multi-speed transmission is increased from a value of the torque at the output rotating member before the downshift within a range of zero or less, and when a rotation speed of the input rotating member of the multi-speed transmission approaches the synchronous rotation speed after the downshift, the target value is reduced toward a torque at the output rotating member after the downshift.

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.

A control device for a vehicle includes an electronic control unit which executes electric assist of rotation of an engine crankshaft by a motor in association with engagement of a clutch, at the time of an ignition start in which fuel injection and sparking are executed with respect to a target cylinder, which has been stopped in an expansion stroke. The electronic control unit corrects at least one of the initiation timing of sparking which is to be initially performed in the target cylinder at the time of the ignition start and an electric assist torque which is to be used for the ignition start, on the basis of a combination of the relationship between an acquisition value and an estimation value of a torque indication value, and the relationship between an acquisition value and an estimation value of an ignition delay time.

A method for operating a drive device for a motor vehicle, which has an internal combustion engine, an electric motor, and a gearshift transmission. A drive shaft of the internal combustion engine can be coupled by a shift clutch to a motor shaft of the electric motor and the motor shaft is coupled to a transmission input shaft of the gearshift transmission. A driven shaft of the drive device is coupled to or can be coupled to a transmission output shaft of the gearshift transmission. In a first shifting state, the shift clutch is disengaged for decoupling of the internal combustion engine and the electric motor and, in a second shifting state, is engaged for coupling of the internal combustion engine and the electric motor.

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.