Control method based on engine starting and stopping and system thereof

A control method and engine technology, applied in the direction of transmission control, mechanical equipment, components with teeth, etc., can solve the problems of frequent starting conditions, increased clutch wear, etc., achieve good fuel economy, realize energy recovery and The effect of deceleration and fuel cut-off

Active Publication Date: 2013-04-10
SHANGHAI AUTOMOBILE GEAR WORKS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantage of this technology is that each vehicle needs to be self-adaptive to the slip rate threshold to overcome individual differences, and the starting conditions are frequent. When starting each time, two clutches are used for synchronous slip-friction linkage control. During the durability process of use, the wear of the clutch increases

Method used

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  • Control method based on engine starting and stopping and system thereof
  • Control method based on engine starting and stopping and system thereof
  • Control method based on engine starting and stopping and system thereof

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Embodiment 1

[0061] In this embodiment, the entire powertrain is embodied by the engine and the gearbox. During any restart of the engine, in order to ensure that the load is small and can be started successfully, it is necessary to ensure that the power transmission chain between the gearbox and the engine is disconnected. For DCT, both clutches are open; and after the engine is restarted, in order to realize power transmission, it is necessary to combine the clutch to transmit engine torque, so as to realize the start of the vehicle.

[0062] This embodiment includes: a gearbox control method from a moving state to a stopped state and from a stopped state to a moving state, wherein:

[0063] The control method from the motion state to the stop state includes the following steps:

[0064] The first step is to judge the engine shutdown condition: if figure 1 As shown in , it is judged whether the engine can be stopped before idling, and the specific judgment steps include:

[0065] 1) Co...

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Abstract

A control method for a gearbox based on engine starting and stopping and a system thereof belong to the field of automotive transmissions. The judgment and the predictive analysis for an engine state are implemented according to engine control signals acquired by a CAN (Controller Area Network) high-speed bus and gear signals of a gear shift mechanism; and the sliding friction degree of a wet clutch is adjusted by comprehensive judgment and predictive analysis through acquiring gearbox signals and diagnosis results of TCU (Transmission Control Unit) internal logic to present driving working conditions, so that the automobile starting control after engine restarting, the engine stopping time judgment and the start-stop feedback signal sending are realized. The method and the system implement optical control for the working state of the gearbox of the automobile in the mutual change process between movement state and stationary state in the start-stop technology, and solve the problem of wearing the clutch mechanical body caused by needing two clutches for sliding friction starting in the prior art.

Description

technical field [0001] The present invention relates to a method and system in the technical field of automobile transmission, in particular to a control method and system for a wet dual-clutch transmission (DCT) matched with engine Start-Stop (start-stop). Background technique [0002] The Start-Stop system is designed to shut down the engine when the engine is idling. When the engine stops running, the Start-Stop system will control the car to no longer consume fuel and generate emissions. The conventional Start-Stop system is a system that controls the start and stop of the vehicle's powertrain (mainly including the engine and gearbox), through The control unit judges the status of the vehicle. For example, the vehicle is in a stagnant state such as a red light or a traffic jam. The system controls the engine to automatically stop running, and the gearbox cuts off the power transmission. When the pedal is pressed, the engine restarts immediately, and the gearbox responds...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W30/18B60W10/02B60W10/06B60W10/10F16H61/02F16H61/12
Inventor 陈洁婧张晔平李育
Owner SHANGHAI AUTOMOBILE GEAR WORKS
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