| Patent application number | Description | Published |
|---|
| 20080274857 | Method for Controlling an Automatic Vehicle Transmission in Order to Reduce Back-and-Forth Shifting - A method of controlling an automatic transmission of a motor vehicle having clutches controlled by an electronic control unit. A transmission rotational speed in an initial transmission stage is determined. If a first transmission shifting rotational speed is reached, the transmission is shifted from the initial transmission stage to a target transmission stage. A target transmission rotational speed of the target transmission stage is then ascertained. A difference is next ascertained between the target transmission rotational speed and a second shifting transmission rotational speed. An initial counter value, of a counter, is determined, which depends on the transmission rotational speed difference. The counter is next caused to carry out counting, from the initial counter value, as time progresses. If and when the counter value reaches zero, the transmission is shifted from the target transmission stage toward the initial transmission stage. | 11-06-2008 |
| 20090192664 | Method for Determining the Mass of a Motor Vehicle - A method for determining a motor vehicle mass which is implemented in conjunction with shifting an automated shift transmission from a current gear to a desired gear. In determining the mass, a value force and movement parameters are determined partly before or after the shift operation and partly during it. For the more rapid and accurate determination of mass, the drive-wheel-related traction force of the drive engine before and after the shift F_zug_vor, F_zug_nach, the longitudinal acceleration of the vehicle before and after the shift, a_zug_vor, a_zug_nach, and the acceleration a_roll determined in the traction-force-free phase during the shift are determined, and from these and in accordance with the equation m=F_zug/(a_zug−a_roll), a first mass value m_vor=F_zug_vor/(a_zug_vor−a_roll) is calculated for the beginning of the shift and a second mass value m_nach=F_zug_nach/(a_zug_nach−a_roll) is calculated for the end of the shift. | 07-30-2009 |
| 20090198404 | METHOD FOR DETERMINING THE DRIVING RESISTANCE OF A MOTOR VEHICLE - A method for determining the driving resistance of a motor vehicle simultaneously with a shift of an automated shift transmission from a load gear to a target gear such that if a difference between a first driving resistance value F_fw_1 and a second driving resistance value F_fw_2 is large, the shift operation can be corrected. The second driving resistance value F_fw_2 is determined during the shift operation. a time interval Δt which contains the traction-force-free phase of the shift, a plurality of acceleration values a_i of the motor vehicle are measured to obtain the minimum acceleration a_min if the shift operation is a traction shift or the maximum acceleration a_max if it is thrust shift. With the mass m of the vehicle, the second driving resistance value F_fw_2 is calculated with one of the formula F_fw_2=−m*a_min or F_fw_2=−m*a_max. | 08-06-2009 |
| 20090240408 | METHOD FOR CONTROLLING SHIFTS IN AN AUTOMATED GEARSHIFT TRANSMISSION - A method for controlling a vehicle's automated transmission, which is arranged in a drive train in the force flow between a engine and a drive axle or a transfer box, depending on certain operating parameters and control actions of an adaptive cruise control system (ACC) that can be operated using engine and brake mechanisms to regulate speed and distance from a car in front. The method controls the transmission when an engine torque demand differs from the torque demand of the ACC. The operating mode of the ACC, which is active at the time, and the load direction of the torque demand of the ACC are determined, and the torque demand, used for controlling the transmission when speed or distance regulation is activated, is determined depending on the ACC operating mode and the load direction of the torque demand. | 09-24-2009 |
| 20090265067 | Method for Controlling Shifting of a Stepped Automatic Transmission - A method for controlling gear shifts in an automated stepped gear transmission of a motor vehicle in which operating parameters of the motor vehicle are continuously determined and evaluated for initiating and carrying out a shift from a currently engaged gear to a target gear such that, before a shift, the shift speed for initiating the shift and the target gear are determined. For better adaptation of the shift, in particular the determination of the shift speed and the target gear, to the current driving and operating conditions of the motor vehicle, the shift types “shift-speed-orientated shift” and “target-speed-orientated shift” are provided and, immediately before a shift operation, it is decided, as a function of at least one of the operating parameters in which, of the two shift types, the shift is to be carried out. | 10-22-2009 |
| 20100042300 | METHOD FOR CONTROLLING AND/OR REGULATING AN AUTOMATIC GEARBOX - A process of controlling and/or regulating an automatic transmission in which a predetermined shifting speed of the gear shift is carried out and adjusted during a shift program, and in which the detection of a constant-speed driving of the vehicle is carried out at least during the shift program. | 02-18-2010 |
| 20100185370 | METHOD FOR CONTROLLING AN AUTOMATIC MULTI-STEP REDUCTION GEAR - The invention concerns a method for controlling an automated multi-step change-speed transmission of a motor vehicle, which is connected on the input side via at least one controllable friction clutch to a drive motor in the form of an internal combustion engine, and on the output side via an axle drive to the drive wheels of a driven axle, and which comprises a plurality of starting gears (G | 07-22-2010 |
| 20100324790 | METHOD FOR CONTROLLING A DRIVE TRAIN OF A MOTOR VEHICLE - A method for controlling a drive train of a motor vehicle comprising a drive engine, an automated transmission, and an automated clutch arranged in the force flow between the drive engine and the transmission. In order to achieve low component wear, a comfortable coasting operation mode and a spontaneous transition into the traction mode, it is provided that additional coast downshifts are prevented as soon as the driving speed (v | 12-23-2010 |
