摘要:
A method for operating a drivetrain of a motor vehicle including a hybrid drive with a combustion engine and an electric motor. A transmission is arranged between the hybrid drive and a drive output and a clutch is arranged between the combustion engine and the electric motor so that, if a failure occurs in the drivetrain, especially in a transmission control device of the transmission, a gear corresponding to an emergency gear is engaged or remains engaged in the transmission. When the emergency gear is engaged, the motor vehicle is in motion and the engine speed falls below a defined value, the clutch arranged between the combustion engine and the electric motor disengages.
摘要:
A method for operating a drivetrain of a motor vehicle including a hybrid drive with a combustion engine and an electric motor. A transmission is arranged between the hybrid drive and a drive output and a clutch is arranged between the combustion engine and the electric motor so that, if a failure occurs in the drivetrain, especially in a transmission control device of the transmission, a gear corresponding to an emergency gear is engaged or remains engaged in the transmission. When the emergency gear is engaged, the motor vehicle is in motion and the engine speed falls below a defined value, the clutch arranged between the combustion engine and the electric motor disengages.
摘要:
A method for modifying a defined adaptive driving strategy, which is stored in the control system for an automatic transmission of a motor vehicle, for adaptation to another type of driver with a different driving style, consists in that the parameters used for the driving strategy are modified by the other driver, the data for this being input to the transmission electronics via an input unit and an interface with the electronics.
摘要:
The invention relates to a method for control of an automatic transmission of a motor vehicle wherein an electronic transmission control, by means of signals proportional to wheel speeds (NRA3, NRA4), determines a transverse acceleration value (AQ) for outputting to additional program modules. The determined wheel speeds (NRA3, NRA4) which enter in the transversal acceleration value (AQ) are corrected by vehicle wheels in a tolerance balance module of the wheels (M1) when a dynamic tire radius (RDYN) in one of the vehicle wheels diverges from a tire radius given in an optimum tire geometry.
摘要:
In a process for control of an automatic transmission (3) in a vehicle, it is proposed to set an electronic transmission control (4) for a driving state low friction value when slip is detected on the input gears of the vehicle or an ACS deceleration is detected. In an ACS deceleration a meter is determined, via an ACS evaluation function, from the actual acceleration of the vehicle or a parameter (e.g., gear speed increase) corresponding to the actual acceleration. When slip occurs, a meter is determined, via a slip evaluation function, from the theoretical/actual comparison of the vehicle acceleration or a parameter (e.g., torque reserve) corresponding to said comparison. In both an ACS deceleration or when a slip occurs, a winter operation mode is then activated when the meter count exceeds a limit value.
摘要:
In the method for kick-down switching speed optimization in a motor vehicle with an automatic transmission, the kick-down upshift point is determined as a function of the load conditions and the road inclination in each case.
摘要:
A process for evaluation of cornering of a vehicle equipped with an automatic transmission by use of electronic transmission control device having a calculation unit, a micro-controller, a memory device and a control device for start up of a hydraulic transmission control device. During a first processing operation (S1), a transverse acceleration (a_Quer) of the vehicle is determined by the calculation unit (30) from wheel speed (n_Rad) of the vehicle measured by a measuring device (34). During a second processing operation (S2), a driver-type theoretical value (FT_Soll) is determined from a vehicle transverse acceleration (a_Quer) and a vehicle speed (v_F). A gear change characteristic line (SL) is determined, based upon an increment (INKR) between the driver-type theoretical value (FT_Soll) and a driver-type actual value (FT_Ist), from several gear change characteristic lines each one associated with a certain driver type or cornering style.
摘要:
The invention relates to a process to evaluate start-up for an automatic vehicle gearbox, said process having the following steps: 1) a signal associated with an engine torque (M_M) or an engine speed (n_M) is emitted from an engine control device (27), and a signal associated with a torque (M_T) or a speed (n_T) of the turbine shaft (18) is emitted at the electronic gear control unit (11) by a measuring device (24) on a turbine shaft (18) of a converter (2) of the automatic gearbox (1); 2) the electronic gearbox control unit (11) determines a maximum value (Max) from time-related differences (DIFF(t)) between the engine torque (M_M) and the torque (M_T) of the turbine shaft (18) or the difference (DIFF(t)) between the engine speed (n_M) and the speed (n_T) of the turbine shaft (18); 3) a gear-change characteristic (SL) characterising a particular start-up style by comparing a theoretical driver-type value (FT_Soll_n) associated with the maximum (Max) with an actual driver-type value (FT_Ist) and the setting of a counter (39) is determined on the basis of the maximum value (Max) of the differences (DIFF(t)), said gear-change characteristic being meant to emit control signals to the hydraulic gearbox control unit (10).
摘要:
A method is described for operating an automatic transmission in which a command for changing a current ratio of the automatic transmission is generated when achieving preset operating states of the vehicle automatically or by manual input in a manual shifting mode, the activated manual shifting mode being preferred to an automatic shifting mode. The manual shifting mode is quit when a current vehicle speed is less than a threshold value, or when a longitudinal acceleration of the vehicle is within a defined range, a lateral acceleration is less than a threshold value and a driver type evaluation counter is less than a limiting value.
摘要:
The method for testing the function of an electrohydraulically controlled automatic transmission upon a testing stand by simulation of a vehicle operation provides that the output shaft of the transmission be connected with a stationary torque-measuring hub and be blocked thereby; the shifting elements existing in the transmission are tested when the output shaft is blocked with an input rotational speed which is precisely sufficient to supply with hydraulic pressure the pressure setting members for the shifting elements. As characteristic quantity can be used the setting member current at which the shifting element slips or at which the slip tends toward zero when the shifting element closes.