A method controls an internal combustion engine that has a drive output shaft connected to an input shaft of a transmission. The internal combustion engine, the transmission and a drive wheel are encompassed by a drivetrain for the drive of a motor vehicle. The method includes determining a rotational acceleration of the input shaft and determining an input torque at the input shaft of the transmission based on a product of the rotational acceleration and a speed reduction ratio-dependent moment of inertia of the drivetrain in a section between the input shaft and the drive wheel. A combustion torque of the internal combustion engine is controlled such that the input torque adheres to a predetermined maximum input torque at the input shaft of the transmission.

A method for preventing damage to a driving system in vehicles may include determining whether a 4-wheel drive vehicle turns based on a steering angle signal, determining, based on an accelerator opening rate signal of the vehicle, whether a maximum torque causing damage to front wheel driveshafts is produced, checking a bump stroke amount of the vehicle and determining whether the front wheel driveshafts are likely to be damaged by a maximum torque transferred to the front wheel driveshafts when the vehicle turns, and lowering, when the front wheel driveshafts are likely to be damaged, a maximum torque of a 4-wheel drive torque applied to the front wheel driveshafts.

A control device for a vehicle is provided. The control device includes an electronic control unit that is configured to: exert the torque of an input member on a fixed member and a rotating member such that the fixed member and the rotating member are separated from each other, when the thrust is exerted for making the engagement teeth mesh with each other; estimate an inclination angle of tooth surfaces based on a relative movement amount between the fixed member and the rotating member, and a relative rotational amount between the fixed member and the rotating member; estimate a frictional coefficient of the tooth surfaces based on the inclination angle; and control the thrust of the actuator according to the frictional coefficient.

A computer for, e.g., a mass market passenger vehicle operable by a virtual driver in autonomous and/or semi-autonomous mode, is programmed to determine that a current vehicle braking capacity exceeds each of a first braking target and a mitigation threshold at a current vehicle speed. The computer is further programmed to compare the current vehicle speed to an engine breaking threshold and generate a transmission control message providing data to operate a vehicle transmission. Where the current vehicle speed is above the engine braking threshold, the transmission control message provides data to operate the vehicle transmission to inhibit transfer of an input torque through the vehicle transmission. Additionally, where the current vehicle speed is below a wheel lock threshold, the transmission control message further provides data to operate the vehicle transmission to inhibit rotation of an output shaft of the vehicle transmission.

The present invention provides for a method and apparatus for preventing damaging of a gear box of a vehicle provided with a servo-actuated clutch system and a servo-actuated gear shift system, the servo-actuated clutch comprising a clutch-servo housing a pneumatic piston, movable between a first and a second positions corresponding to an open and a closed system of the clutch. The functioning of servo-actuated gear shift system is enabled when the pneumatic piston position exceeds, toward said disengagement state, a third predefined position.

A drive system includes a drive source and a transmission mechanism transmitting a torque between the drive source and a drive wheel. The transmission mechanism includes at least one clutch switching between an engaged state of transmitting the torque between elements constituting the drive system and a disengaged state of failing to transmit the torque. An ECU detects at least one loaded state in which an excessively large torque can be applied to the drive system in a direction from the drive wheel, and disengages a predetermined clutch when the at least one loaded state in which an excessively large torque can be applied is detected. In the case where an excessively large torque can be applied to the drive system, the torque applied to a predetermined element constituting the drive system can be blocked and the torque applied to the drive system can be suppressed with a good response.

A controller comprises a memory, including a maximum rated driveshaft torque for a driveshaft on a vehicle, and an electrical output transmitting an output signal for limiting a torque on the driveshaft of the vehicle during an event while the vehicle is attempting to at least one of maintain and increase velocity. The torque on the driveshaft is limited by controlling braking pressure to at least one brake associated with driven wheels and/or controlling motor torque delivered to the driveshaft.

A method and device for controlling a hybrid starter generator (HSG) of a hybrid electric vehicle (HEV) can distinguish a section in which tension influencing durability of a belt connected between an internal combustion engine and the HSG increases, and another section in which the tension decreases, in order to restrict a change in torque of the HSG connected to the belt.

A method and system for controlling temperatures in a driveline assembly of a vehicle are provided. In one embodiment, the method includes determining an operating temperature associated with the driveline assembly of the vehicle, the driveline assembly comprising forward and rear axles and a power transfer device configured to transmit power from a power source of the vehicle to the forward and rear axles. The method further includes computing a gain factor responsive to the operating temperature, adjusting a control parameter value of a traction control system of the vehicle responsive to the gain factor, and generating a control signal from the traction control system responsive to the control parameter value, the control signal configured to adjust at least one of an output torque of the power source and a braking force of a brake of the vehicle.

A control method is provided for a powertrain in a vehicle, the powertrain including an engine mechanically connected to a gearbox and an Electronic Control Unit (ECU), wherein the method includes allowing an extraordinary gear shift in spite of a first torque comparison indicating an expected engine output torque demand above a first general limit for allowed output torque associated with the extraordinary gear shift provided that: a second torque comparison indicates that the expected engine output torque demand after the extraordinary gear shift is within the limits of a second temporarily increased allowed engine output torque limit; and an extraordinary gear shift criteria is fulfilled indicating a gear shift is allowed the criteria being dependent on at least one parameter chosen among estimated fuel efficiency, engine efficiency, expected future torque demand, time of running the engine above the general engine torque limit and engine temperature.