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Dual-clutch transmission starting control method

A dual-clutch transmission, clutch control valve technology, applied in the direction of transmission control, gear transmission, components with teeth, etc., can solve the problem of starting and being unable to do anything

Active Publication Date: 2014-04-09
HYCET TRANSMISSION TECH HEBEI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the control method of this patent application can achieve the effect of smooth and fast start and protect the clutch through the control of the two clutches when the car starts;

Method used

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  • Dual-clutch transmission starting control method

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Embodiment Construction

[0026] see figure 2 , image 3 , Figure 4 , the control mechanism matched with the present invention includes clutch oil temperature sensor A2, engine speed sensor A1, transmission input shaft speed sensor A4, shift lever position sensor A3, TCU, first clutch control valve B1, second clutch control valve B2 and First gear shift fork B3, second gear shift fork B4. Among them, the engine speed sensor A1 is a current-type speed sensor, which is installed on the transmission housing, and calculates the speed value input from the engine to the transmission by detecting the revolutions of the gears on the outer hub of the dual clutch, that is, the speed of the dual clutch driving disc; the transmission input The shaft speed sensor A4 is a current-type speed sensor, which is installed inside the transmission. It detects the transmission input shaft speed by detecting the magnetic change when the signal wheel rotates, that is, the speed of the clutch driven disc; the clutch oil te...

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Abstract

The invention relates to a dual-clutch transmission starting control method which includes the steps of a, judging starting conditions; b, selecting a starting control mode; c, enabling power to be output through a first output shaft of a transmission after the transmission enters a first-gear starting control mode; d, enabling the power to be output through a second output shaft of the transmission after the transmission enters a second-gear starting control mode, and meanwhile conducting fine grinding smoothening processing with a second clutch control valve; e, enabling a TCU to judge whether a second-gear-to-first-gear control strategy is executed or not according to information transmitted by a clutch oil temperature sensor; f, enabling the TCU to judge whether a starting clutch fine smoothening grinding control mode is stopped or not according to gear shifting state information; g, enabling the TCU to judge whether the steps e-g are repeatedly executed or the steps f-g are repeatedly executed according to information transmitted by an engine rotation speed sensor and a transmission input shaft rotation speed sensor. According to the dual-clutch transmission starting control method, the defect that an exiting dual-clutch transmission is large in starting mode power loss and difficult to start under the low temperature working condition is overcome, and the comfort performance and the reliability of vehicle starting are improved.

Description

technical field [0001] The invention relates to a dual-clutch transmission, in particular to a starting control method of the dual-clutch transmission under low-temperature conditions, and belongs to the technical field of transmissions. Background technique [0002] The automatic transmission with dual-clutch structure (i.e., dual-clutch transmission DCT) not only inherits the advantages of simple structure, high transmission efficiency and low cost of manual transmission (MT) and electromechanical automatic transmission (AMT), but also overcomes the advantages of MT and AMT. The lack of power interruption during the shifting process of AMT has a shift quality comparable to that of a hydrodynamic automatic transmission (AT). Therefore, DCT can not only improve the power and fuel economy of the vehicle, but also improve its driving comfort. But the coordinated control of the transmission in the starting process has always been the key and difficult point in the developme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/02
CPCF16H3/006F16H61/0206F16H59/72F16H61/688F16H2061/0087F16H2061/0234
Inventor 墨森赵宏伟秦军超
Owner HYCET TRANSMISSION TECH HEBEI CO LTD
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