A powertrain, engine crash protection device and method

Abstract

The invention relates to a power assembly, an engine runaway protection device and a method. The engine runaway protection device includes a flywheel assembly and a clutch assembly, the flywheel assembly is arranged at the engine output end, the clutch assembly is arranged at the gearbox input end, and the flywheel The assembly and the clutch assembly cooperate with each other, the flywheel grinding plate of the flywheel assembly and the clutch grinding plate of the clutch assembly are pressed together, and the flywheel grinding plate and the clutch grinding plate form an asymmetrical damping structure, so that the flywheel The friction coefficient between the grinding plate and the clutch grinding plate is greater than the friction coefficient between the flywheel grinding plate and the clutch grinding plate during engine braking; in application, when the reverse dragging power of the whole vehicle is greater than the engine braking power limit, the flywheel and The clutch slips relative to each other, so as to prevent the engine speed from being too high, which exceeds the allowable operating speed of the engine design, thereby avoiding serious failures such as valve turning, valve top piston, and body destruction, thereby protecting the safety of the engine, the vehicle and the driver.

Description

Technical field [0001] The present invention relates to the field of power systems, and in particular, to a power assembly, an engine speed protection device and method. Background technique [0002] For heavy trucks or large tonnage mines running in the mountainous area, they often encounter a downhill working condition, or a continuous downhill section, some users trigger the engine to slow down the switch is not timely, or step on the foot brakes, leading to the downhill process The engine speed is too high, exceeding the engine design allows for the use of speed, thereby turning a serious failure of the valve turning, the valve top piston, the body smashing, thus jeopardizing the safety of the vehicle and driver. Inventive content [0003] The first object of the present invention is to provide an engine speed protection device to avoid too high engine speed during the downhill. [0004] A second object of the present invention is to provide a dynamic assembly based on the a...

AI Technical Summary

Problems solved by technology

[0002] For heavy trucks or large-tonnage mining vehicles running in mountainous areas, they often encounter full-load downhill conditions, or continuous downhill road sections. Some users trigger the engine retarder switch not in time, or step on the foot brake in time, resulting in the downhill process. The engine speed is too high, which exceeds the allowable operating speed of the engine design, and serious failures such as valve turning, valve top piston, and body destruction occur, thus endangering the safety of the vehicle and the driver

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