Engine overspeed protection control method, engine overspeed protection control system and engineering vehicle

Abstract

The invention provides an engine overspeed protection control method and system and an engineering vehicle. The engine overspeed protection control method specifically comprises the steps that current gear information and target gear information are obtained; the rotating speed of the target gear information is calculated based on the gear information; and determining the rotating speed of the target gear and the maximum rotating speed allowed by the target gear information so as to determine the gear change of the gearbox. The vehicle speed is ensured to be stable during downhill, the rotating speed of the engine is prevented from being too high, and overspeed caused by reverse dragging of the engine in the downhill process is avoided. And meanwhile, the completion of the upshift operation is displayed, the driver is reminded that the upshift operation is completed, the rotating speed of the transmission mechanism is judged when the driver performs the downshift operation, and the downshift operation can be performed when the rotating speed of the transmission mechanism is not overspeed after the downshift operation is determined. Under the condition that the safety of the vehicle is guaranteed, a driver can make appropriate operation or prevent the situation that the rotating speed of an engine is too large due to wrong downshift operation of the driver.

Description

technical field [0001] The invention relates to the field of engineering vehicle control, in particular to an engine overspeed protection control method and a control system thereof, and an engineering vehicle. Background technique [0002] During the operation of the car, the overspeed of the engine or the overspeed of the transmission gear often occurs. If no measures are taken, it will cause the mechanical failure of the engine, damage the power transmission assembly, and bring great harm to the safety of the whole vehicle and personnel. In the current technical solution, the engine has entered or critically entered an overspeed operation state, and the engine or the powertrain system is protected by certain measures. If the protective device does not operate in time, there is still a risk of overspeed damage to the engine. The engine or transmission is prone to overspeed damage during a malfunction of the engine fuel system, or the driver's wrong gear operation, or duri...

AI Technical Summary

Problems solved by technology

When the engine fuel system fails, or the driver wrongly engages in gear, or during long-distance downhill driving in low gear, the engine or gearbox is easily damaged by overspeed

[0003] Therefore, how to propose an engine overspeed protection control method that prevents the driver from erroneously shifting gears during the shifting process, or that the engine or gearbox is easily damaged by overspeeding during long-distance low-gear downhill driving has become an urgent problem to be solved at present. technical problem

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