Control method and device of automatic gearbox

Abstract

The invention discloses a control method and device of an automatic gearbox. The method comprises the steps that motion time used by a plurality of clutch motions is obtained in advance; the motion time corresponding to each clutch motion is set as preset duration of the clutch motion; each clutch motion comprises a set starting position point of a clutch and a set target position point of the clutch; whether the time used by the clutch motions for reaching the set target position point is the preset duration or not, and if yes, the clutch is intermittently driven; whether the number of times for intermittent driving of the clutch motions to the clutch reaches the set number or not and whether the clutch reaches the set target position point are judged, if not, the clutch is stopped from driving. According to the method, in the clutch motion process, after the clutch motions exceed the corresponding preset time, the clutch is intermittently driven, the clutch is intermittently driven to reach the set time number, then the clutch is stopped from driving, and therefore the phenomenon that the clutch is driven for a long time is avoided, and the failures of the clutch or an electrically-controlled electric booster are avoided.

Description

technical field [0001] The invention relates to the field of motor vehicles, in particular to an automatic transmission control method and device. Background technique [0002] The automatic transmission appeared relative to the manual transmission, a device that can automatically shift gears according to vehicle driving conditions such as vehicle speed and accelerator pedal depth. [0003] Common forms of automatic transmissions include automated mechanical transmissions (Automated Mechanical Transmission, AMT). The electromechanical automatic transmission not only needs an automatic shift actuator instead of manual operation to change gears, but also needs an automatically controlled clutch actuator to replace the operation of stepping on the clutch pedal. The actuator is a clutch booster. At present, most commercial vehicles on the market still use pneumatic clutch booster cylinders, which are controlled by solenoid valves to open or close the air inlet / air outlet, but i...

AI Technical Summary

Problems solved by technology

[0005] Since the setting of the overtime limit is small, false alarms are prone to occur, so the setting of the overtime limit in the prior art will be relatively large, so that it cannot completely prevent the solenoid valve of the electro-pneumatic clutch booster cylinder from being burned out, or the electric control electric Booster motor burnt out

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