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Optimized upshifting control method for wet type double-clutch transmission

A technology of dual-clutch transmission and control method, which is applied to transmission control, elements with teeth, belts/chains/gears, etc. Effect

Active Publication Date: 2015-12-23
SHANGHAI AUTOMOBILE GEAR WORKS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology cannot solve the problem that if the driver intends to accelerate and step on the accelerator during the upshift process without the accelerator, the control program cannot immediately jump to the upshift strategy with the accelerator, and the response is slow, which affects the driving comfort of the driver.

Method used

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  • Optimized upshifting control method for wet type double-clutch transmission
  • Optimized upshifting control method for wet type double-clutch transmission
  • Optimized upshifting control method for wet type double-clutch transmission

Examples

Experimental program
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Embodiment 1

[0025] Such as figure 1 As shown, this embodiment includes the following steps:

[0026] Step 1. The TCU collects vehicle running information from the engine, clutch and gearbox in real time, and judges the stage of the no-throttle upshift strategy before the driver steps on the accelerator.

[0027] The running information includes: engine speed, engine output torque, clutch surface temperature, throttle opening status, current gear, target gear, synchronizer action flag, interaction status of the target gear clutch and current gear clutch and slave Rotary speed.

[0028] Step 2. Calculate the corresponding target transmission torques of the target gear clutch and the current gear clutch in the three jump stages according to the optimized upshift control strategy, specifically:

[0029] 2.1) CO strategy:

[0030] a) P1 stage: if figure 2 As shown, the hydraulic oil pre-charge target pressure for driving the target gear clutch engagement is the LTP point pressure value. W...

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Abstract

The invention discloses an optimized upshifting control method for a wet type double-clutch transmission. The optimized upshifting control method for the wet type double-clutch transmission comprises the steps that an upshifting control strategy is optimized according to vehicle running information acquired through a terminal control unit (TCU) in real time, so that corresponding target transmission torques of all stages of clutches are obtained; and finally, optimized upshifting control is achieved through interaction of the torques of the clutches and synchronization of the rotating speeds of a driving disc and a driven disc of the clutch at the target gear. According to the optimized upshifting control method for the wet type double-clutch transmission, a model for converting an accelerator-free upshifting strategy into an accelerator upshifting strategy is established, the TCU is used for control calculation, rotating speed synchronization and torque interaction are conducted on the clutches of the double-clutch transmission, in this way, the response speed is increased, gear shifting is smooth, and driving comfort is improved.

Description

technical field [0001] The invention relates to a technology in the field of transmission control, in particular to an optimized upshift control method for a wet dual-clutch transmission. Background technique [0002] The even-numbered gears of the current wet dual-clutch automatic transmission are distributed to one of the two sub-transmissions, and the odd-numbered gears are distributed to the other sub-transmission. By interleaving the friction clutches assigned to the subtransmissions, it is possible to shift gears from the actual gear to the target gear without interruption of tractive force. [0003] The no-throttle upshift strategy refers to the upshift control method adopted by the TCU (Transmission Control Unit, automatic transmission controller) when the vehicle reaches the upshift shift point when the driver releases the accelerator pedal while the vehicle is running. During the execution of the no-throttle upshift strategy, if the driver steps on the accelerator...

Claims

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Application Information

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IPC IPC(8): F16H61/02
CPCF16H61/0204F16H61/0213F16H2061/0227F16H2306/00F16H2718/00
Inventor 华富根邹涛董志军张晔平
Owner SHANGHAI AUTOMOBILE GEAR WORKS