Method for operating dual clutch transmission
A dual-clutch transmission, transmission technology, applied to components with teeth, transmission control, belts/chains/gears, etc., can solve complex shifting processes, long shifting time, and affect the spontaneity of dual-clutch transmissions, etc. question
Inactive Publication Date: 2013-10-02
ZF FRIEDRICHSHAFEN AG
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Problems solved by technology
[0006] In order to avoid a traction-interrupted gearshift in a space-saving dual-clutch transmission, the required gear ratio changeover between transmission ratios which in known dual-clutch transmissions can only be shifted with traction-intermittent is performed as traction-interruptible It is achieved by two shifts of , which first shift without interruption from the output ratio traction force set in one transmission component to the support gear represented in the other transmission component, and then start the traction force from the support gear Uninterrupted shifting to the chosen target gear ratio, where such double shifting is characterized by the need for two consecutive clutch overlaps, which has a complex shifting sequence compared to conventional power shifting, and shifting The duration is longer, which undesirably affects the spontaneity of the dual-clutch transmission
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[0020] figure 1 shows a schematic diagram of the gears of the dual clutch transmission 1, which consists of two frictionally coupled shifting elements K1 and K2 and seven form-fitting shifting elements A to F and K. also, figure 2 Shows a wiring diagram in tabular form, in which the shift elements A to F, K, K1 and K2 are listed in the column header and the seven transmission ratios "1" for forward travel are listed in the row header to "7" and the two ratios "R1" and "R2" for reverse travel. The lines in this connection diagram each filled with a dot each represent a shifting element of the dual clutch transmission 1 for transmitting power for a transmission ratio. The blank areas in this connection diagram each indicate that a shift element is not involved in the process of specifying the transmission ratio of the dual clutch transmission.
[0021] The input sides of the two frictionally coupled shifting elements K1 and K2 are connected via the transmission input shaft 2...
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The method involves disconnecting partial transmission by a gear-shifting element (K1,K2), and representing different gear ratios of dual clutch transmission (1) with the partial transmission. A shift request is performed for carrying out a transmission ratio change in the dual clutch transmission in traction force interruption-free manner depending on a current load fed by the dual clutch transmission.
Description
technical field [0001] The invention relates to a method of operating a dual clutch transmission of the type stated in the preamble of claim 1 or 10 . Background technique [0002] Vehicles known in practice are often implemented with automatically shifted transmissions, wherein said transmissions mainly exhibit two different characteristics. On the one hand, in the speed change device, each gear ratio corresponds to one power switching element. On the other hand, the known transmission consists in principle of at least two individual transmissions connected in parallel, wherein each individual transmission corresponds to at least one power switching element, and each of these power switching elements has a row of shape-matched contacts for connection. Switches on and off the shift elements for different gear ratios. [0003] The aforementioned transmissions are generally known as so-called dual-clutch transmissions, in which form-adapted shifting elements are engaged in t...
Claims
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IPC IPC(8): F16H61/02F16H61/688
CPCF16H61/0213F16H61/16F16H61/688F16H2061/0444
Inventor J·瓦夫齐希M·格茨R·德赖霍尔茨
Owner ZF FRIEDRICHSHAFEN AG