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Method for determining and/or compensating crosstalk characteristics of a dual clutch transmission
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A dual-clutch and transmission technology, applied in clutches, mechanical equipment, etc., to simplify evaluation and save computing time
Active Publication Date: 2016-08-24
SCHAEFFLER TECH AG & CO KG
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However, no method is given as to how these model parameters could be determined on the test rig
Furthermore, it may only be possible to determine one set of parameters for all vehicles by means of test bench measurements
However crosstalk is affected by component tolerances and thus varies (at least slightly) from clutch to clutch
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[0021] figure 1 A schematic diagram of a drive train 1 of a motor vehicle with a dual clutch transmission is shown. Here, a drive unit 2 , for example an internal combustion engine, is connected via a shaft 3 to a dual clutch transmission, which will be described in detail below. The dual-clutch transmission is formed from two branches and has a first sub-transmission clutch 4 , which leads to a first sub-transmission 9 . The drive unit 2 is also connected to a second sub-transmission clutch 5 , which leads to a second sub-transmission 8 . The two subtransmissions 8 , 9 lead via an axle differential 10 to a drive shaft 11 of the motor vehicle.
[0022] Different gears are stored in the subtransmissions 8 , 9 . Thus the first sub-transmission 9 has odd gears such as 1,3,5 and the second sub-transmission 8 has even gears such as 2,4,6. When actuating a dual-clutch transmission, for example, when shifting from a first gear to a second gear, the two subtransmission clutches 4,...
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Abstract
The invention relates to a method for determining the crosstalk behavior of a hydrostatic dual-clutch transmission of a motor vehicle, said dual-clutch transmission having two subtransmission clutches (4, 5), which are arranged on a drive unit (2) and each of the sub-transmissions (8, 9), wherein the two sub-transmission clutches (4, 5) are actuated independently of each other via each of the sub-transmission clutch actuators (6, 7), wherein during the actuation, it is determined by The actuating pressure (p4, p5) of the sub-transmission clutch actuator (6, 7) acting on the sub-transmission clutch (4, 5) and the clutch actuation displacement passed by the sub-transmission clutch (4, 5) , the crosstalk variables (Δx4, Δx5) are determined for each subtransmission clutch (4, 5) from the clutch actuation displacement. In a method for determining the crosstalk behavior of a hydrostatic dual clutch transmission, which can be determined not only at the belt ends but also during driving in the motor vehicle, each crosstalk variable (Δx4, Δx5) is derived from the characteristic The characteristic curves are derived from the curves ( K4 , K5 ), which are generated as a function of the actuation pressures ( p4 , p5 ) of the two subtransmission clutches ( 4 , 5 ).
Description
technical field [0001] The invention relates to a method for determining the crosstalk behavior of a hydrostatic dual clutch transmission of a motor vehicle, said dual clutch transmission having two subtransmission clutches which are respectively arranged between a drive unit and a respective subtransmission during which the two subtransmission clutches are actuated independently of each other via a subtransmission clutch actuator, wherein during actuation the actuating pressure applied by the subtransmission clutch actuator to the subtransmission clutch and the clutches passed by the subtransmission clutch are determined An actuation displacement from which a crosstalk variable is determined for each subtransmission clutch. Background technique [0002] Within the scope of this document, a hydrostatic clutch system is understood to mean a dual clutch transmission in which, in particular, a hydrostatically operated actuator HCA is provided for actuating two automatic frictio...
Claims
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