Abstract:
A control sytsem is disclosed for shifting gears in an automatic shift gear box (3) by using fuzzy logic methods. Vehicle parameters form input variables (8) that are continuously detected by appropriate means (9). These input variables are further processed in downstream functional blocks (11, 12, 13, 14, 15, 16 and 17). Gear shifting points that ensure an economical driving are determined in the functional block (11) according to fuzzy logic methods. Besides a set of basic fuzzy logic generating rules, additional rules are used to improve driving. For that purpose, the input quantity "desired performance" is taken into consideration in both sets of rules. The desired performance may be a desired acceleration or a desired deceleration. In order to form a closed regulation circuit, the fictitious quantity "desired performance" and the quantity "driving manner" are converted into physical quantities.
Abstract:
According to the invention the process determining transmission of an infinitely variable change-speed gear (5)generates dynamic autonomy. The actual, minimum and maximum acceleration (a_akt, a_min, a_max)is calculated. The driver's desire to accelerate or decelerate (a_fwu) is detected and acceleration (a vorg)determined. Also calculated is the change in the transmission per unit of time of an infinitely variable change-speed gear(iv_pkt, guided by engine speed during shifting of the infinitely variable change-speed gear (5).
Abstract:
Die Erfindung betrifft ein Verfahren zum Betreiben eines Antriebsstrangs, wobei der Antriebsstrang ein als Hybridantrieb ausgebildetes Antriebsaggregat mit einem Verbrennungsmotor und einem Elektromotor, ein zwischen den Hybridantrieb und einen Abtrieb geschaltetes Getriebe und einen elektrischen Energiespeicher umfasst, Erfindungsgemäss werden auf Basis von Daten über eine gesamte zukünftig zurückzulegende Fahrtstrecke fahrtstreckenabhängige Sollladezustände (SOC) des elektrischen Energiespeichers und/oder fahrtstreckenabhängige Sollemissionsgrenzwerte bestimmt. Die Hybridstrategie steuert und/oder regelt den Betrieb des Antriebsstrangs zusätzlich abhängig von den fahrtstreckenabhängigen Sollladezuständen des elektrischen Energiespeichers und/oder den fahrtstreckenabhängigen Sollemissionsgrenzwerten. Vorteilhaft werden in Abhängigkeit von der Höhe bzw. dem Höhenunterschied Stützstellen (X1, X2,..., XE) mit vorgegebenem Ladezustand (SOC) definiert.
Abstract:
The invention relates to a control system (10) for changing automatic gears (3). The control system (10) operates by fuzzy logic methods. The entire fuzzy logic production rules are divided into at least three parts: a basic set of rules to determine the gear-changing point in a consumption-oriented driving style, an adaptation set of rules to modify the basic set of rules, depending on the current driving style, and an identification set of rules for classifying a driver according to his/her own driving style. A supplementary adaptation set of rules permits the basic set of rules to be modified according to a current driving condition. Individual function blocks (11 to 15) operate preferably according to the same inference mechanisms. Gamma operators are used in order to approximate human decision behaviour as closely as possible. A process for generating membership functions to determine a running condition by fuzzy logic production rules is proposed. In a preferred embodiment, the activation of adaptive gear-changing behaviour is brought about by the formation of offsets. Priorities are allocated to the rules especially for reasons of safety and reliability.
Abstract:
The invention relates to a method of adjusting the transmission ratio of a continuously variable gear. The position of a current operating point (B_akt) in a predetermined driving range is constantly adjusted in accordance with the driving situation. The position of the operating point is also determined by range boundaries (UG, OG) which can be varied in accordance with the driving resistance and driver's manner of driving. The method is characterised in that it simplifies development and application.
Abstract:
The invention concerns a gear-change control system (10) for an automatic transmission (3). Input variables, derived from a driver-vehicle system, are established. Output variables are established by fuzzy logic methods and used to determine a gear-change ratio. A fuzzy logic module, which imitates the operating method of a logical flip-flop and additionally permits continuous intermediate values, is used to consider driving states brought about by different situations.