A control method for preventing engine flameout in automobile traction control system

Abstract

A control method for preventing an engine from stalling by a vehicle traction control system, comprising the following steps: 1) obtaining the corresponding relationship between the gear position and each driving parameter of the vehicle according to a bench test and a vehicle TCS road test, and storing it in a TCU of the vehicle; 2) When the vehicle is running, if the TCU receives the TCS trigger signal, the vehicle enters the anti-stop control preparation stage, making the clutch output pressure equal to the clutch target pressure at this time, and then enters the next step; 3) If the vehicle meets the conditions, the vehicle enters the anti-flame control preparation stage. In the flameout forced control stage, the TCU makes the clutch output pressure equal to the clutch target pressure corresponding to the clutch half-engagement torque, and repeats steps 2) to 3); 4) If the vehicle meets the conditions, the vehicle enters the flameout prevention routine control stage, and the TCU makes the clutch output The pressure is equal to the clutch target pressure, and steps 2) to 4) are repeated.

Description

technical field [0001] The invention relates to the field of automobile engine control, in particular to a control method for an automobile traction control system to prevent engine flameout. Background technique [0002] Vehicles equipped with a traction control system (TCS) that automatically control brake and motor torque to prevent wheel spin and improve driving when starting or accelerating on snowy, icy, or uneven surfaces stability. [0003] When the vehicle slips at a low speed, the wheel speed is fully controlled by the Traction Control System (TCS), and the clutch is in a fully engaged state during the entire process. When the vehicle is in a high-adhesion uphill section, the vehicle will control the engine torque, braking force, etc. with a low slip due to the intervention of the TCS after the vehicle slips. At this time, once the engine torque is limited, the engine speed will be rapidly lowered. Due to the lack of engine capacity, the engine cannot respond whe...

AI Technical Summary

Problems solved by technology

At this time, once the engine torque is limited, the engine speed will drop rapidly. Due to the lack of engine capacity, the engine cannot respond when the engine torque is restored for the second request, resulting in flameout, which poses a serious threat to the safety of drivers and passengers.

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