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Vehicle starting control method and device, vehicle and storage medium

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

Active Publication Date: 2020-04-10
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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  • Vehicle starting control method and device, vehicle and storage medium
  • Vehicle starting control method and device, vehicle and storage medium
  • Vehicle starting control method and 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. Image 6 It is a structural block diagram of the vehicle starting control device provided by Embodiment 3 of the present invention, as Image 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 tor...

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Abstract

The invention discloses a vehicle starting control method and device, a vehicle and a storage medium. The vehicle starting control method comprises the steps: the pressure of an odd clutch and the pressure of an even clutch are controlled to reach a pressure point of starting to transmitting torque; expected transmission output torque is obtained in real time according to an expected starting speed curve, and the expected transmission output torque is distributed onto the odd clutch and the even clutch according to set rules; when the expected transmission output torque reaches a preset outputexpected value, a working clutch is selected from the odd clutch and the even clutch according to the opening degree of an accelerator pedal, and the output torque of a non-working clutch is reducedto zero; and an engine is controlled to maintain micro sliding-friction with the working clutch. The situation that in the prior art, first-gear starting is adopted for a long term, and consequently,abrasion of the two clutches is uneven is solved, the effect of prolong the life of a whole dual-clutch assembly is achieved, the structure of the controller is simple and clear, and the expected starting process of a driver can be met.

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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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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