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Slope gear-shifting control method of control system of automatic wet-type double-clutch transmission

A wet dual-clutch, transmission control technology, applied in transmission control, road transportation, components with teeth, etc., can solve the problem that the shifting model cannot meet the demand, the shifting characteristic cannot meet the demand for the gear position, etc. To achieve the effect of improving economy and power, and improving power

Active Publication Date: 2015-07-22
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this single shift feature cannot meet the needs of vehicles for gears in different driving environments
For example, in a slope environment, the driver has higher requirements for the power of the vehicle during the uphill process, and the shift model based on the flat road environment can no longer meet the demand.

Method used

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  • Slope gear-shifting control method of control system of automatic wet-type double-clutch transmission

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Embodiment Construction

[0027] The invention relates to a method for obtaining the current slope value through calculation when an automatic dual-clutch transmission is applied to a complete vehicle. The automatic transmission includes two sets of speed change devices, and each set of speed change devices includes a clutch for transmitting input torque, a transmission input shaft and a set of speed ratio mechanisms. The clutch friction plate is cooled by cooling oil, the clutch input shaft is connected to the engine, and the engine torque is transmitted to the speed ratio mechanism through the closing of the clutch. Each set of speed ratio mechanism can realize the transmission of different speed ratios. During the shifting process, through the switching of the two clutches, the shifting without power interruption can be realized. The speed changer has at least one rotating speed sensing device arranged on the clutch input shaft, and there are also rotating speed sensing devices for testing the rotat...

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Abstract

The invention relates to a slope gear-shifting control method of a control system of an automatic wet-type double-clutch transmission. The method includes the following steps: calculating the driving power of an engine according to the torque of the engine and the rotating speed of a clutch which transmits the torque currently; calculating the vehicle driving wasted power according to the vehicle speed and the whole-vehicle resistance; calculating the acceleration of the rotating speed of the engine according to the rotating speed of the engine, and then calculating power losses caused by the inertia of the rotating speed of the engine through the acceleration of the rotating speed of the engine and the inertia of the rotating speed of an input part of the clutch; carrying out differential on the practical vehicle speed to obtain the whole-vehicle practical acceleration; calculating current slope information; adjusting gear-shifting rule parameters based on the slope information. According to the method, the current gear-shifting rule of the transmission is compensated through the slope information, upshifting of the transmission is correspondingly delayed based on the gradient to obtain the sufficient whole-vehicle driving force, and the whole-vehicle power performance is improved.

Description

technical field [0001] The invention belongs to the technical field of automatic wet dual-clutch transmission control, and relates to a slope shift control method used in the automatic wet dual-clutch transmission control system. Background technique [0002] Dual-clutch transmission is a kind of automatic transmission scheme, and its structure is relatively familiar. For example DE 35 46 454 A1 is already known. But in recent years it has been used in batches on cars as an automatic dual-clutch transmission. The device comprises two sets of transmissions which can be regarded as independent, and each set of transmissions comprises a clutch and a gear ratio device. Each transmission gets its torque through its connection with the engine, and at the output end, they may share an output shaft that transmits the torque to the wheels. Or output through a gear mechanism to a common driven gear and then connected to the output shaft. The two independent clutches can be an inte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H59/66F16H59/14F16H59/56F16H61/02
CPCF16H59/14F16H59/56F16H59/66F16H61/0204F16H2059/663F16H2306/00Y02T10/60
Inventor 张广辉熊杰杨俊马岩张荣辉
Owner CHINA FIRST AUTOMOBILE
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