A vehicle starting control method, device, vehicle and storage medium

A control method and vehicle technology, which is applied in the field of vehicles and storage media, and vehicle start control, can solve the problem of less consideration of the driver's starting acceleration feeling, and achieve the effect of prolonging life and having a simple and clear structure

Active Publication Date: 2021-10-29
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the existing research on the control of starting often focuses on ensuring that the car completes the starting process as fast and smooth as possible, and less consideration is given to the driver's expected starting acceleration experience.

Method used

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  • A vehicle starting control method, device, vehicle and storage medium
  • A vehicle starting control method, device, vehicle and storage medium
  • A vehicle starting control method, device, vehicle and storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] figure 1 It is a flow chart of the vehicle starting control method provided in Embodiment 1 of the present invention. This embodiment is applicable to the vehicle starting situation of dual-clutch transmission. The method can be executed by the vehicle starting control device, which can be realized by software and / or hardware .

[0053] Such as figure 1 As shown, the method specifically includes the following steps:

[0054] Step 110 , controlling the pressure of the odd-numbered clutches and the even-numbered clutches to reach the pressure point at which torque transmission starts.

[0055] Wherein, the dual clutch transmission (Dual Clutch Transmission, DCT) has two sets of clutches, and the two sets of clutches are respectively connected to different input shafts. If clutch one is connected to gears 1, 3, and 5 through a solid shaft, clutch two is connected to gears 2, 4, 6 and reverse through a hollow shaft. In this embodiment, the first clutch is called an odd ...

Embodiment 2

[0068] figure 2 , image 3 , Figure 4 , FIG. 5( a ) and FIG. 5( b ) are schematic diagrams of a vehicle start-up control method provided by Embodiment 2 of the present invention. On the basis of the above-mentioned embodiments, this embodiment further optimizes the above-mentioned vehicle starting control method.

[0069] The transmission system of dual clutch transmission is a nonlinear system with multiple masses, multiple degrees of freedom and high degree of coupling. In order to simplify the model, consider its main dynamic characteristics, ignore the lateral vibration of the shaft, the gear clearance, the influence of temperature on the transmission system, etc. to model the transmission system. According to Newton's second law, the engine torque balance equation is:

[0070]

[0071] In the formula, J is the moment of inertia, b is the coefficient of viscous friction, ω is the speed, and T is the torque. Subscript e stands for engine, T c is the clutch torque...

Embodiment 3

[0149] The vehicle start control device provided in the embodiment of the present invention can execute the vehicle start control method provided in any embodiment of the present invention, and has corresponding functional modules and beneficial effects for executing the method. Figure 6 It is a structural block diagram of the vehicle starting control device provided by Embodiment 3 of the present invention, as Figure 6 As shown, the device includes: a pressure control module 310 , a torque distribution module 320 , a clutch selection module 330 and a micro-slip module 340 .

[0150] The pressure control module 310 is used to control the pressure of the odd-numbered clutches and the even-numbered clutches to reach the pressure point at which torque transmission begins.

[0151] The torque distribution module 320 is used to obtain the desired transmission output torque in real time according to the desired starting speed curve, and distribute the desired transmission output t...

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Abstract

The invention discloses a vehicle starting control method, device, vehicle and storage medium. The method includes: controlling the pressures of the odd-numbered clutches and the even-numbered clutches to reach a pressure point at which torque begins to be transmitted; obtaining an expected transmission output torque in real time according to a desired starting speed curve, and distributing the desired transmission output torque to the odd-numbered clutches and all the odd-numbered clutches according to a set rule. on the even-numbered clutches; when the expected transmission output torque reaches a preset output expected value, select a working clutch among the odd-numbered clutches and the even-numbered clutches according to the accelerator pedal opening, and reduce the output torque of the non-working clutch to zero; Control the engine to maintain a slight friction with the working clutch. The problem of uneven wear of the two clutches caused by the long-term use of the first gear for starting in the prior art is solved, and the effect of prolonging the life of the entire dual clutch assembly is achieved. The controller has a simple and clear structure, and can meet the driver's desired starting process.

Description

technical field [0001] Embodiments of the present invention relate to vehicle design technologies, and in particular to a vehicle starting control method, device, vehicle and storage medium. Background technique [0002] At present, the starting method of a dual-clutch transmission (DCT) vehicle mostly refers to the starting method of a traditional mechanical automatic transmission (AMT), and adopts a gear to start, that is, a first-gear starting mode. Under heavy load or climbing conditions with a large starting load, it is easy to cause the surface temperature of the odd-numbered clutches connected to the first gear to be too high, which greatly shortens the service life of the clutches; long-term use of the first gear to start will also cause uneven wear of the two clutches. There will be a situation where one clutch is relatively intact and the other clutch is severely worn, which is not conducive to the service life of the clutch assembly. [0003] Another way to start...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D48/06
CPCF16D48/06F16D2500/10412F16D2500/10437F16D2500/30822F16D2500/3115F16D2500/3144F16D2500/50224F16D2500/50236F16D2500/50251F16D2500/50293F16D2500/50296F16D2500/70252F16D2500/70424F16D2500/70426F16D2500/708
Inventor 叶珂羽顾强唐立中刘振宇陈建勋康志军
Owner CHINA FIRST AUTOMOBILE
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