Starting control method and system for plug-in hybrid vehicle carrying DCT (Discrete Cosine Transformation)

A technology of hybrid electric vehicle and control method, which is applied in the field of start-up control of plug-in hybrid electric vehicles, to achieve the effects of improving comfort and safety, reducing fuel consumption rate and exhaust emissions

Pending Publication Date: 2022-04-22
千方联陆智能交通科技(上海)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this patent does not consider the impact of different starting conditions on the driver's starting judgment due to the random combination of factors such as the load size of the vehicle, the type and size of the slope, and the SOC state.

Method used

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  • Starting control method and system for plug-in hybrid vehicle carrying DCT (Discrete Cosine Transformation)
  • Starting control method and system for plug-in hybrid vehicle carrying DCT (Discrete Cosine Transformation)
  • Starting control method and system for plug-in hybrid vehicle carrying DCT (Discrete Cosine Transformation)

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Embodiment

[0039] Plug-in hybrid electric vehicles can not only realize various starting methods under the engine starting under the traditional configuration, but also can realize driving motor starting (pure electric starting), engine combined driving motor starting (dual power source combined starting), optional Diversification while minimizing emissions and improving fuel economy.

[0040] The present invention combines the operating conditions of the vehicle (starting) and the driver's starting operation intention, unifies and equates the two into the starting required power of the whole vehicle, and considers the SOC state of the battery pack of the whole vehicle, and specifically subdivides the starting type into pure electric uphill Start, pure electric downhill start, engine combined with single clutch C2 / C1 start, engine combined with dual clutch start and C2 / C1 is the target combined clutch, dual power source combined start and other start types.

[0041] Considering the diffe...

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Abstract

The invention provides a starting control method and system for a plug-in hybrid power vehicle carrying a DCT, and the method comprises the steps: 1, obtaining the driving condition and vehicle information, including the operation intention of a driver, the power demand of the whole vehicle and the SOC state of a battery pack; 2, the starting intention and the starting type are judged, power source torque changes of an engine and a driving motor are controlled, the torque fluctuation of the engine and the driving motor from a speed change mechanism to a wheel end is within a preset range, and therefore the whole vehicle demand torque distribution is conducted; 3, power source torque coordination control based on PID feedback control is carried out; and 4, based on the driver operation intention, vehicle starting control is conducted through a driver operation intention controller and a wet clutch oil pressure controller. While the dynamic property and economical efficiency of the plug-in hybrid electric vehicle are met, the current whole vehicle state and driver requirements can be accurately detected, and the starting mode of the plug-in hybrid electric vehicle is reasonably adjusted.

Description

technical field [0001] The present invention relates to the technical field of vehicle starting control, in particular to a method and system for controlling the starting of a DCT-equipped plug-in hybrid electric vehicle. Background technique [0002] During the starting process, the random combination of vehicle load, slope type and size, SOC status and other factors will form different starting conditions, which will affect the driver's starting judgment to a certain extent. [0003] The driver mainly expresses his willingness to start by stepping on the depth and speed of the pedal, which is reflected in the change of the pedal opening and the change rate of the pedal opening. How to combine different starting conditions and multiple starting types of this configuration more efficiently is very important. [0004] Patent document CN112677958A (application number: CN202110025858.3) discloses a vehicle start control method, system and vehicle. The method is that when the v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W20/10B60W30/18B60W10/06B60W10/08B60W10/02
CPCB60W20/10B60W30/18027B60W10/06B60W10/08B60W10/02B60W2510/242Y02T10/62
Inventor 韦永恒
Owner 千方联陆智能交通科技(上海)有限公司
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