Method for controlling normal starting of dual-clutch automatic transmission

Abstract

The invention discloses a method for controlling normal starting of a dual-clutch automatic transmission. The method comprises the steps of obtaining the position of an ignition lock of an engine and the position of a gear shifting rod; obtaining the opening of an accelerator pedal, the net torque of the engine and the rotating speed of the engine every a set sampling period; judging whether the ignition lock of the engine is in the ON gear, judging whether the gear shifting rod is switched to the D / R gear from the P gear, judging whether the opening of the accelerator pedal is larger than the set opening threshold value of the accelerator pedal; if the ignition lock of the engine is in the ON gear, the gear shifting rod is switched to the D / R gear from the P gear, and the opening of the accelerator pedal is larger than the set opening threshold value of the accelerator pedal, switching the gear shifting rod to the D gear from the P gear, conducting normal starting control over a first clutch so as to enable the difference between rotating speed of the engine and the set target rotating speed to meet the set error range; when the gear shifting rod is switched to the R gear from the P gear, conducting normal starting control over the second clutch so as to enable the difference between rotating speed of the engine and the set target rotating speed to meet the set error range. According to the method, in the normal starting process, switching between the two clutches is not required, and safety and comfort of a whole vehicle are facilitated.

Description

technical field [0001] The invention relates to the technical field of automobile transmissions, in particular to a normal start control method of a double-clutch automatic transmission. Background technique [0002] A typical wet dual-clutch automatic transmission has two internal and external clutches. The external clutch is connected to the external input shaft and controls the odd gears. The external clutch is also called the first clutch. The internal clutch is connected to the internal input shaft and controls the even gears and gears. The reverse gear (that is, the R gear), the inner clutch is also called the second clutch. Electro-hydraulic control is used to drive the solenoid valve to realize the gear change and the alternate work of the clutch, and finally realize the automatic shifting. [0003] At present, in the prior art, there is only a control method for the normal start of a transmission equipped with a single clutch or a torque converter, but there is no ...

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Problems solved by technology

[0003] At present, in the prior art, there is only a control method for the normal start of a transmission equipped with a single clutch or a torque converter, but there is no special control method for a normal start of a wet dual-clutch automatic transmission, which may lead to During the process, the whole vehicle started unevenly, which reduced the safety of the whole vehicle and the comfort of driving.

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