摘要:
A method for controlling an automatic transmission in a drive train of a motor vehicle having a transmission controller selecting and shifting gears of the transmission includes determining a new gear by reference to gear shift characteristic curves and generating a gear shift instruction as soon as a working point of the drive train exceeds a gear shift characteristic curve. The transmission controller determines a new gear that is expected to be engaged shortly. If the new gear differs from the current gear, an initial phase of the gear shift is carried out and the gear shift is completed as soon as the gear shift instruction has been generated. The initial phase is carried out as soon as the working point drops below a predefined distance from the gear shift characteristic curve.
摘要:
A data storage system for a motor vehicle has at least two control units (1) for controlling one or several vehicle components each, at least two memories (2) for storing data that characterize the route to be traveled on in future, and an interface (3) to a data source (4). Every control unit (1) inquires with the data source (4) a subset of the route data contained therein via the interface (3) and stores the route data transmitted in response in the memory (2) associated with the respective control unit (1).
摘要:
A drive-train control system is provided with an engine control system by which variables that influence the engine torque are controlled, a transmission control system by which a ratio of the transmission is controlled, and a map memory from which a set ratio of the transmission can be taken as a function of a torque demanded by the driver and of a variable linked to the vehicle speed, and the characteristics of which are defined in a vehicle-dependent manner taking into account the maximum possible torque.
摘要:
The drivetrain of a motor vehicle with an engine, a crankshaft starter-generator, a hydrodynamic torque converter and an automatic gearbox, comprises an overriding drivetrain controller (20) with a driver and situation recognition (31), a status controller (34) and a torque management (35). The controller carries out the following functions: a start-stop operation, an increase in engine torque, a rolling of the vehicle on a non-engaged drivetrain and a regenerative braking operation.
摘要:
A vehicle door trim for a motor vehicle with a head impact protection device for a vehicle occupant is provided. In one embodiment, the door trim includes a curb carrier of the vehicle door trim in which is located a cutout for fixing the head impact protection device in the assembled position of the vehicle door trim in an area close to the side window of the vehicle door, a head impact protection device, which comprises an airbag carrier joined to the curb carrier so as to be airtight, an airbag, which on the rim side is fixed to the airbag carrier so as to be airtight, and a gas generator, which may be permanently joined to the airbag carrier. The vehicle door trim covers a foam layer over the curb carrier and, in the area of the cutout, over the airbag carrier. A decorative layer on the side of the foam layer facing away from the curb carrier is provided. The foam layer is designed so that on actuation of the head impact protection device, it may lift easily from the airbag carrier.
摘要:
A vehicle door trim for a motor vehicle with a head impact protection device for a vehicle occupant is provided. In one embodiment, the door trim includes a curb carrier, a head impact protection device, a foam layer over the curb carrier and a decorative layer on the side of the foam layer facing away from the curb carrier. The curb carrier may include at least one fixing attachment for fixing the head impact protection device in an area in the assembled position of the vehicle door trim that is close to the side window of the vehicle door as well as a cover area that covers the head impact protection device. The head impact protection device may include as a module, an airbag carrier, an airbag and a gas generator. The foam layer may be sufficiently elastic to deform on actuation of the head impact protection device. The cover area of the curb carrier may have a material weakening which may be adapted such that on actuation of the head impact protection device the cover area may tear open in the area of the material weakening.
摘要:
A method for driving a drive assembly in a drive system having an automatic transmission and an automatic clutch optionally coupling the drive assembly to the automatic transmission in order to transmit torque includes the following steps. Sensing whether a procedure, in particular a gearshift operation, is to be conducted. After the procedure has been sensed, predefining, for at least one time segment of the procedure which is to be carried out a prediction profile for an operational variable that characterizes the operating state of the drive assembly. And, driving the drive assembly based on the predefined prediction profile of the operational variable to minimize a deviation between the operational variable and the prediction profile.
摘要:
A combined engine and transmission control unit for a motor vehicle uses the position of the accelerator pedal to calculate setpoint values for the engine and the transmission of the motor vehicle. The control unit has a drive-train controller, which, when the engine is not in traction mode, controls the driving mode of the motor vehicle. The driving mode is adapted to the surroundings of the motor vehicle and the driving style of the driver. The drive-train controller activates an engine torque control when brake slip is detected, and the transmission controller prescribes a lower gear than is provided for the unbraked mode of the motor vehicle by a characteristic diagram.
摘要:
A control device for an automatic motor vehicle transmission reduces engine torque during a shifting operation, in particular a shifting operation in a traction mode, in order to increase smoothness of shifting. The engine torque reduction is begun at the earliest upon reaching a free-wheel point of the transmission and is ended shortly before a synchronizing point of the transmission is reached. The free-wheel point and the synchronizing point of the transmission are ascertained from rpm differences in the gearshift elements involved in the particular switching operation. Differential rpm thresholds used in the process and the intensity of the torque reduction are ascertained with fuzzy systems.
摘要:
A control configuration for a motor vehicle includes an engine control and a transmission control which are connected to one another through a communication channel. A transmission is shifted by using electrohydraulic pressure control valves for actuating friction elements in the transmission. The transmission control is mounted at a transmission housing. Solenoids of the electrohydraulic pressure control valves are integrated into the transmission control. Sensor signals which are to be evaluated by the transmission control are transmitted by sensors to the transmission control wirelessly.