摘要:
A method of determining the size of a gear interval from a currently engaged gear to a target gear in a transmission. The method includes the steps of, for each current gear and for each possible gear interval from the current gear, recording a limit value for an acceleration or a deceleration in the target gear corresponding to the current gear and the respective gear interval used; for the current gear, starting with the smallest gear interval, applying a loop with successive increases of the gear interval to determine, depending on the current driving situation and characteristic parameters of the vehicle, the acceleration or the acceleration theoretically obtainable in the target gear produced by using the gear interval, which is compared with the respective recorded limit value until the acceleration or the deceleration theoretically obtainable no longer contravenes the limit value. The gear interval is then selected for a gearshift.
摘要:
A method of controlling the driving mode of a motor vehicle, having a largely automated drive-train including a drive motor, a transmission and a separator clutch arranged between the motor and transmission, such that while driving, if certain operating conditions exist and a speed profile calculated with reference to topographical data and vehicle parameters for a road section lying ahead is suitable, the drive-train is disengaged and driving continues in a coasting mode until the occurrence of a termination signal. To enable coasting operation, the calculated speed profile for the case of immediate opening of the drive-train is determined continually at equidistant successive travel points along the driving stretch and is, in each case, evaluated in relation to lower and upper speed limits. Coasting is only enabled if, for a specified minimum number of successive travel points, the evaluation result is in each case positive.
摘要:
A method of controlling the driving mode of a motor vehicle, having a largely automated drive-train including a drive motor, a transmission and a separator clutch arranged between the motor and transmission, such that while driving, if certain operating conditions exist and a speed profile calculated with reference to topographical data and vehicle parameters for a road section lying ahead is suitable, the drive-train is disengaged and driving continues in a coasting mode until the occurrence of a termination signal. To enable coasting operation, the calculated speed profile for the case of immediate opening of the drive-train is determined continually at equidistant successive travel points along the driving stretch and is, in each case, evaluated in relation to lower and upper speed limits. Coasting is only enabled if, for a specified minimum number of successive travel points, the evaluation result is in each case positive.
摘要:
A method for automatically determining a current offset value for the zero-point correction of a vehicle inclination sensor including the steps of while driving in a first driving direction, the current driving resistance is determined repeatedly, without regard to the sensor and stored temporarily, and a current raw signal value of the sensor is noted. Upon a change in the driving direction, the last-noted raw signal value is stored temporarily and while driving in the second driving direction. The current driving resistance is determined repeatedly, without regard to the sensor and stored temporarily. Then, if the difference between the two stored driving resistances agree with a tolerance threshold, the noted raw signal value is stored as the offset value for the zero-point correction of the inclination sensor.
摘要:
A method for automatically determining a current offset value for the zero-point correction of a vehicle inclination sensor including the steps of while driving in a first driving direction, the current driving resistance is determined repeatedly, without regard to the sensor and stored temporarily, and a current raw signal value of the sensor is noted. Upon a change in the driving direction, the last-noted raw signal value is stored temporarily and while driving in the second driving direction. The current driving resistance is determined repeatedly, without regard to the sensor and stored temporarily. Then, if the difference between the two stored driving resistances agree with a tolerance threshold, the noted raw signal value is stored as the offset value for the zero-point correction of the inclination sensor.
摘要:
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 (vF) of the motor vehicle has reached or dropped below a previously defined threshold speed (vGr) for coast downshifts (vF
摘要:
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.
摘要:
A method of controlling a rolling or a coasting function of a vehicle, such as a commercial vehicle, having a drive train including a drive motor, an automatic or automated transmission that is controllable by transmission controls, a controllable shifting mechanism for interrupting the flow of power in the drive train, and a driving speed control device. The flow of power in the drive train is interrupted in a suitable driving situation. In order for the rolling or the coasting function to be exploited as efficiently as possible, and still be terminated safely and comfortably, the flow of power in the drive train is restored depending on a selectable difference in speed (Δv_F_T) between the current vehicle speed (v_F) and a speed limit (v_T) set by the driving speed control device.
摘要:
A method of controlling a rolling or a coasting function of a vehicle, such as a commercial vehicle, having a drive train including a drive motor, an automatic or automated transmission that is controllable by transmission controls, a controllable shifting mechanism for interrupting the flow of power in the drive train, and a driving speed control device. The flow of power in the drive train is interrupted in a suitable driving situation. In order for the rolling or the coasting function to be exploited as efficiently as possible, and still be terminated safely and comfortably, the flow of power in the drive train is restored depending on a selectable difference in speed (Δv_F_T) between the current vehicle speed (v_F) and a speed limit (v_T) set by the driving speed control device.
摘要:
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 (GAnf, G1-G5), such that at the beginning of a starting process one of the starting gears (GAnf, G1-G5) is selected as a function of the vehicle's mass (mFzg) and of the road gradient (αFb) as the optimum starting gear (GAnf—opt) and is then engaged. To avoid substantial implementation effort and cost, it is provided that after the specification of a minimum starting acceleration (aAnf—min) and of a static engine torque (MMot—st) transmitted, averaged over time, by the friction clutch during its slipping phase, a minimum transmission ratio (iAnf—min) necessary for starting is calculated from the formula: i Anf_min = ( 1 2 * M Mot_st * η ges J Antr * a Anf_min - 1 4 ( M Mot_st * η ges J Antr * a Anf_min ) 2 - m Fzg * a Anf_min + F W J Antr * a Anf_min ) * r dyn i Ha and the optimum starting gear (GAnf—opt) is selected as a function of the calculated minimum transmission ratio (iAnf—min).
摘要翻译:本发明涉及一种用于控制机动车辆的自动多步变速传动的方法,该机动车辆通过至少一个可控摩擦离合器连接到输入侧,以内燃机形式的驱动马达, 输出侧通过轴驱动传递到从动轴的驱动轮,并且包括多个起动齿轮(GAnf,G1-G5),使得在起动过程开始时,起动齿轮(GAnf,G1 -G5)作为车辆质量(mFzg)和道路坡度(αFb)的函数作为最佳起动档(GAnf-opt)而被选择,然后被接合。 为了避免实质性的实施努力和成本,规定在摩擦离合器在其滑移阶段期间指定最小起动加速度(aAnf-min)和传递的静态发动机扭矩(MMot-st) ,从公式计算起始所需的最小传动比(iAnf-min):i Anf_min =(1 2 * M Mot_st *&eegr; ges J Antr * a Anf_min - 1 4(M Mot_st *&eegr ges J Antr * a Anf_min)2-m Fzg * a Anf_min + FWJ Antr * a Anf_min)* r dyn i Ha和最佳起始档(GAnf-opt)作为计算出的最小传动比(iAnf-min)的函数。