Abstract:
A motor vehicle control system for controlling a plurality of vehicle subsystems to operate in a plurality of subsystem control modes in dependence on a driving surface. The system is operable in an automatic control mode selection condition in which the system is configured to determine the driving surface automatically and to cause each of the vehicle subsystems to operate in a predetermined one of the subsystem control modes in dependence on the determined driving surface. The system may be configured to determine if an interruption in powertrain torque occurs and to, in dependence on the identification of a powertrain torque interruption event, temporarily suspend causing an automatic change to the predetermined one of the subsystem control modes in which each subsystem is operating.
Abstract:
A method for controlling a propulsion system for a vehicle including a transmission coupling an output shaft of the internal combustion engine to a drive wheel of the vehicle, wherein said transmission includes a lash region, the method comprising of adjusting an operating parameter of the engine so that at least one cylinder of the engine is transitioned between a first combustion mode and a second combustion mode, and varying a timing of said transition responsive to whether the transmission is operating within the lash region of the transmission.
Abstract:
A method for controlling an automated friction clutch that is located between a drive motor and a transmission in a motor vehicle that is equipped with fraction control and driving condition recognition for detecting current driving conditions.
Abstract:
A method for controlling a vehicle operation in the transmission lash region. One method includes transitioning a combustion mode of a cylinder, and varying a timing of said transition responsive to whether the transmission is operating within the lash region of the transmission.
Abstract:
A system for controlling the engagement and disengagement of one or more clutches that are adapted to operatively connect an engine and an automatic transmission includes a control device for determining if a negative torque condition exists and for providing an output or signal to decrease the rotational speed of the engine in response to the determination of the existence of the negative torque condition.
Abstract:
A system for controlling the engagement and disengagement of one or more clutches that are adapted to operatively connect an engine and an automatic transmission. The system including a control device for determining if a negative torque condition exists and to provide an output or signal to decrease the rotational speed of said engine in response to the determination of the existence of a negative torque condition.
Abstract:
At the time of automatic gear changing without declutching in a mechanical stepped gearbox (6) in a motor vehicle, the speed of the gearbox output shaft (36) is detected and any speed change occurring immediately after disengagement of a gear to neutral position results in adjustment of a predetermined zero-torque level for the engine as a function of the speed change.
Abstract:
A method of engaging and disengaging transmission gears in a vehicle is provided. An intent switch is actuated for preparing the transmission to engage or disengage the transmission gears. An engine speed synchronization (ESS) controller processes an input torque parameter representing torque from an engine and an output torque parameter representing torque at a transmission output shaft. The input torque parameter may include such inputs as friction torque while the output torque parameter may include such inputs as vehicle torque load. The input torque parameter is adjusted to approximate the output torque parameter for achieving a zero torque load between the engine and transmission output shaft to facilitate engaging and disengaging transmission gears.
Abstract:
It is provided a control device of a hybrid type vehicle power transmission device having a prime mover and an electric motor each coupled to a drive shaft in a power transmittable manner, including: a slow change processing means, when any of a torque of the drive shaft, a torque of the prime mover, and a torque of the electric motor changes and passes through zero, slowly changing the torque at a change rate set in advance for suppressing gear rattling noise; and a torque compensating means, if the slow change processing means slowly changes the torque of one of the prime mover and the electric motor, compensating a shortage of the torque of the drive shaft occurring due to the slow change with the other torque not slowly changed.
Abstract:
A method for operating a hybrid drive of a motor vehicle in particular. An internal combustion engine is connected to a generator via a force-conducting connection. In a learning mode, the generator is operated as a motor and drives the internal combustion engine. In this learning mode, a so-called zero quantity calibration is performed.