Abstract:
A method includes measuring a parameter indicative of a measured torque in a PTO clutch (60), determining an incremental torque based at least in part on proportional-integral-derivative (PID) control logic, determining a command torque, wherein the command torque is a sum of the measured torque and the incremental torque, generating a control signal, wherein a current of the control signal corresponds to the command torque and a pressure in a cylinder (106) of the PTO clutch (60), providing the control signal to the PTO clutch (60), reducing the incremental torque if an engagement power exceeds an engine power output, and ceasing engagement if an energy absorbed by the clutch exceeds an energy rating of the PTO clutch (60).
Abstract:
The invention relates to a method for synchronising the common speed (ω p) of two concentric primary shafts (1, 6) of a hybrid transmission in a hybrid operating mode wherein said two shafts are rotatably connected by a first coupling means (5), with the speed (ω s) of a secondary transmission shaft (10) comprising at least one idler pinion for allowing the coupling of one of said pinions (11, 12) to the shaft (10) thereof by closing a second coupling means (13) that does not have mechanical synchronisation bodies, the torque (Te) of the electric machine being temporarily reduced during the synchronisation phase in order to meet the conditions of a perfect coupling when the value thereof caps at an upper limit value ( T e max ) or a lower limit value ( T e min ).
Abstract:
Disclosed is a motor vehicle with a drive train comprising at least one controllable clutch, in which unwanted rpm oscillations on the output side of the clutch (2), e.g. due to the age of the clutch (2), are reduced by determining a variable for rpm oscillations on the output side and reducing the rpm oscillations according to the determined variable by means of a regulating mechanism which acts upon the controllable clutch (2). The regulating mechanism used for reducing rpm oscillations is advantageously limited regarding a minimum frequency in order not to influence an additional parallel regulating mechanism that also acts upon the controllable clutch (2). The oscillations can be suppressed without influencing existing regulating mechanisms by separately superimposing the control loop used for eliminating rpm oscillations upon other regulating mechanisms by means of a bandwidth limitation for the regulating mechanism used for reducing the rpm oscillations and an associated regulating mechanism, e.g. for controlling the rotational speed of the engine.
Abstract:
L'invention à pour objet un procédé de détermination du point de léchage (Plech) d'un embrayage (3) d'un véhicule de type hybride au démarrage de celui-ci ledit véhicule comportant un moteur thermique (2) et une machine électrique (4) couplés entre eux par l'intermédiaire de l'embrayage (3) caractérisé en ce qu 'il comporte les étapes suivantes, - on vérifie que le moteur thermique (2) est démarré et que l'embrayage (3) est ouvert, - on régule le régime (WMTH) du moteur thermique (2), vers un régime de consigne, - on régule le régime (WMEL) de la machine électrique (4), vers un régime de consigne (WconsMTH), - on régule le couple (CMEL) de la machine électrique (4) vers une valeur nulle, lorsque la machine électrique (4) a atteint son régime de consigne (WconsMEL), - on mémorise la décélération du régime (WMEL) de la machine électrique (4), - on ferme progressivement l'embrayage (3), de sorte qu'un couple résistif est transmis par l'embrayage (3) à la machine électrique (4) pour perturber son régime (WMEL), et - on mémorise la position (Pemb) de l'actionneur de l'embrayage (3), correspondant au point de léchage (Plech) dès qu'une variation de la décélération de la machine électrique (4) est supérieure à une valeur seuil.
Abstract:
The present invention relates to controlling a hybrid vehicle provided with an engine (1), a motor-generator (5) and a transmission (3). A first clutch (6) is provided between the engine (1) and the motor-generator (5), and a second clutch (7) is provided between the motor-generator (5) and the transmission (3). To change between a hybrid drive mode and an electric drive mode using only the motor-generator (5), the torque transfer capacity of the second clutch (7) is reduced. This helps in absorbing torque variations caused by stopping the engine (1). The transmission may comprises several sets of planetary gears, and the second clutch may also be a clutch used in the transmission for gear shifting.
Abstract:
A vehicle traveling control method comprising: determining a driver's intention for acceleration during vehicle traveling; predicting, when it is determined that the driver has no intention for acceleration, which is superior between a first fuel consumption reduction effect (E1) by inertial traveling and a second fuel consumption reduction effect (E2) by deceleration energy regeneration, the inertial traveling making the vehicle (1) travel, with power transmission disconnected between an engine (2) and a drive wheel (6a, 6b) of the vehicle (1), and the deceleration energy regeneration inputting rotational power of the drive wheel (6a, 6b) of the vehicle (1) to an electric motor (8) ; performing inertial traveling when it is predicted that the first fuel consumption reduction effect (E1) by inertial traveling is superior to the second fuel consumption reduction effect (E2) by deceleration energy regeneration; and performing deceleration energy regeneration when it is predicted that the first fuel consumption reduction effect (E1) by inertial traveling is not superior to the second fuel consumption reduction effect (E2) by deceleration energy regeneration.
Title translation:Verfahren zur Steuerung eines automatischen,insbesondere automatisierten Getriebes eines Kraftfahrzeugs,vorzugsweise eines Doppelkupplungsgetriebes