A start control method and device for an amt-equipped vehicle

Abstract

The invention discloses a starting control method and device for a vehicle with AMT. When a vehicle is started, a control clutch is engaged to an idle running eliminating position, and when a clutch is engaged to a first target position, the control clutch continues to engage; if the vehicle enters into a creeping mode or a normal starting mode is determined depending on the states of a vehicle footbrake and a hand brake and an opening degree of an accelerator pedal; when the vehicle enters into the creeping mode, the control clutch is engaged to a slipping phase at a first speed; when it is detected that the rotating speed of a gear box input shaft is greater than a first preset rotating speed threshold value and when a clutch position reaches a second target position, the vehicle is controlled to creep; if the rotating speed of the gear box input shaft is still less than the first preset rotating speed threshold value when the clutch position reaches the second target position, thenthe control clutch continues to engage at a second speed, the second speed is less than the first speed, the vehicle is controlled to creep until the rotating speed of the gear box input shaft is greater than the first preset rotating speed threshold value, and starting of the vehicle is safe and reliable.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a start control method and device for an AMT-equipped vehicle. Background technique [0002] At present, some domestic high-end commercial vehicles adopt automatic mechanical transmission (Automated Mechanical Transmission, hereinafter referred to as AMT). However, due to the immature AMT technology, if the clutch control is not good during the starting process, the vehicle's starting power and comfort will be reduced during the starting process. The stability is poor, and it is impossible to safely back into the garage or connect to the trailer, which seriously affects the safety and comfort of vehicle driving. [0003] Therefore, there is an urgent need for a vehicle starting method with high safety and high comfort. Contents of the invention [0004] In view of this, the embodiments of the present invention provide a start control method and device for a vehicle equippe...

AI Technical Summary

Problems solved by technology

[0002] At present, some domestic high-end commercial vehicles adopt automatic mechanical transmission (Automated Mechanical Transmission, hereinafter referred to as AMT). However, due to the immature AMT technology, if the clutch control is not good during the starting process, the vehicle's starting power and comfort will be reduced during the starting process. Poor performance, and cannot safely back into storage or connect trailers, which seriously affects the safety and comfort of driving

Images