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Gear-shifting control method for hybrid vehicle with AMT (Automated Mechanical Transmission)

A technology of a hybrid vehicle and a control method, applied in the field of vehicle shift control, can solve the problems of large rotational inertia of AMT and difficult shifting, and achieve the effects of shortening synchronization time, prolonging service life and reducing wear and tear.

Active Publication Date: 2016-01-27
DONGFENG COMML VEHICLE CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] Aiming at the defects of the AMT on the existing hybrid electric vehicle, such as large moment of inertia and some difficult shifting problems, the present invention provides a shift control method for a hybrid electric vehicle with AMT

Method used

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  • Gear-shifting control method for hybrid vehicle with AMT (Automated Mechanical Transmission)
  • Gear-shifting control method for hybrid vehicle with AMT (Automated Mechanical Transmission)
  • Gear-shifting control method for hybrid vehicle with AMT (Automated Mechanical Transmission)

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Embodiment Construction

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] For details, see Figure 1 to Figure 3 , a shift control method for a hybrid vehicle with AMT. Compared with the power train of a traditional vehicle, a vehicle loaded with an AMT (automatic mechanical transmission) 4 has an electric motor 3 ahead of the AMT 4, and the engine 1 and the electric motor 3 pass through the clutch 2, and the motor 3 is coaxial with the input shaft of AMT4. During the shifting process, the clutch 2 is disengaged, and the power transmission of the engine 1 is interrupted; however, the motor 3 is still connected with the input shaft of the AMT4. Therefore, by using the quick response characteristic of the motor 3 of the vehicle controller, according to the requirement of gear shift control, the motor 3 is controlled to adjust the rotational speed of the AMT4 input shaft, so that the motor 3 assists th...

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Abstract

The invention provides a gear-shifting control method for hybrid vehicle with an AMT (Automated Mechanical Transmission). By using fast response characteristics of a vehicle control unit and a motor (3), the motor (3) is controlled to adjust the rotation speed of an input shaft of the AMT (4) according to a gear shifting control need so that the motor (3) provides assistance to the AMT (4) during shifting the gear. The gear-shifting control method comprises the following steps of judging a gear, judging a state of a clutch (2), leaving the vehicle in a neutral gear, selecting a gear, engaging the gear and entering a driving working condition. The synchronization time of the rotation speed of an engine (1) and the rotation speed of the AMT (4) is reduced, the power interruption time is obviously reduced, the gear shifting comfort is improved, the wear of a synchronizer is reduced and the service life of the synchronizer is prolonged.

Description

technical field [0001] The invention relates to a gear shift control method of a hybrid vehicle, more specifically relates to a gear shift control method of a hybrid vehicle with an AMT, and belongs to the technical field of vehicle gear shift control. Background technique [0002] AMT (Automatic Mechanical Transmission) is widely used in hybrid vehicles. Compared with the power train of the conventional vehicle, the AMT-equipped vehicle has the electric motor located in front of the mechanical automatic transmission, and the electric motor is coaxial with the input shaft of the mechanical automatic transmission. [0003] However, under this structure, the moment of inertia of the AMT input shaft is not only the clutch driven disc, but also the rotor of the motor, so that the moment of inertia increases accordingly. Therefore, in the shifting condition, the following shifting problems arise: (1) The synchronizer in the AMT is severely worn and the gear is difficult to shift...

Claims

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Application Information

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IPC IPC(8): B60W10/08B60W10/11
CPCB60W10/08B60W10/11
Inventor 何华强高鑫张明凯马彪方红
Owner DONGFENG COMML VEHICLE CO LTD
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