Abstract:
The invention relates to a controller (3) for controlling a vehicle driveline (100), in particular a driveline (100) comprising a hydrostatic transmission (17), wherein the controller (3) is configured to: output a control command (19) for controlling at least one driveline component (4) according to a control map (5), the control map (5) defining a dependence of the control command (19) on at least one of: a control position of an input device (2), and at least one first condition of the driveline (100); receive at least one input signal (8, 18), the input signal (8, 18) comprising a plurality of signal values recorded at different times, wherein the signal values of the at least one input signal (8, 18) are indicative of at least one of: the control position of the input device (2), the at least one first condition of the driveline (100), and at least one second condition of the driveline (100); derive a feature (27a, 27b, 28a, 28b; 35a, 35b, 36a, 36b) from the plurality of signal values; and adapt the control map (5) based on the derived feature (27a, 27b, 28a, 28b; 35a, 35b, 36a, 36b). The invention further relates to a vehicle driveline (100) including said controller (3) and to a method of calibrating a controller (3) for controlling a vehicle driveline (100).
Abstract:
Procédé de contrôle de traction d'un circuit d'assistance hydraulique de véhicule, dans lequel on applique une pression cible (C), et on détermine une pression de consigne (Pc) et une valeur théorique (Vth) d'un paramètre, on applique une consigne de pression (Pls) à la pompe hydraulique (10) égale à la pression de consigne (Pc), on mesure une valeur effective (Ve) dans ledit circuit d'assistance hydraulique, on compare la valeur effective (Ve) mesurée dans ledit circuit d'assistance hydraulique à la valeur théorique (Vth), et si un écart entre la valeur effective (Ve) et la valeur théorique (Vth) est supérieur à une valeur seuil, on réalise une étape (E5) d'ajustement de la consigne dans laquelle on modifie la consigne de pression (Pls) de la pompe hydraulique (10) de manière à ce qu'elle soit égale à une pression effective (Pe), à un coefficient d'ajustement près.
Abstract:
A method is provided for estimating input torque and output torque in a continuously variable transmission having a variator. The method comprising the steps of determining (202) a transmission input and/or output speed, calculating (204) the speed of each of a plurality of transmission components by reflecting the transmission input and/or output speed through the transmission to each of the plurality of transmission components, and calculating (208) the speed rate of change of each of the plurality of transmission components. The inertia torque of each of the plurality of transmission components is calculated (210) based upon its respective speed rate of change and a predetermined component inertia value (209). The method further comprises the steps of determining (211) a motor torque of the variator, and calculating (212) a transmission input torque and transmission output torque by reflecting the motor torque of the variator through the transmission to the transmission input and output. The calculated transmission input and output torque values are adjusted (214) to account for the calculated inertia torque values of those of the plurality of transmission components which lie between the variator and the transmission input, and the variator and the transmission output, respectively.
Abstract:
The application relates to control of hydrostatic pumps in a power machine (100). Signals coming form a user input device (202) are modified, depending on actual engine torque, leading to different dis¬ placement of a hydrostatic pump. The aim is to avoid excessive pow¬ er loads on the engine, which may reduce efficiency and performance and lead to engine stall.