Active vibration reduction method for dual-fuel engine

Abstract

The invention discloses an active vibration reduction method for a dual-fuel engine of a vehicle. Dual fuels comprise the first fuel and the second fuel. The active vibration reduction method for the dual-fuel engine comprises the following steps that S1, fluctuation of rotating speed of the dual-fuel engine is detected; S2, the fluctuation of the rotating speed of the dual-fuel engine is adjusted by synchronously changing the ultimate fuel-injection quantity of one of the first fuel and the second fuel in each working cycle of the dual-fuel engine at the same frequency as the fluctuation of the rotating speed. According to the active vibration reduction method for the dual-fuel engine of the vehicle, the ultimate fuel-injection quantity of one of the first fuel and the second fuel is synchronously changed according to the frequency of the fluctuation of the rotating speed of the dual-fuel engine, the phenomenon that due to simultaneous change of the ultimate fuel-injection quantity of the first fuel and the ultimate fuel-injection quantity of the second fuel, working is asynchronous is avoided, the fluctuation of the rotating speed of the dual-fuel engine is smooth in an acceleration or deceleration process of the whole vehicle, and the active vibration effect is good.

Description

technical field [0001] The invention relates to the field of engines, in particular to an active damping method for a dual-fuel engine. Background technique [0002] The active vibration reduction method of the engine refers to the method of adjusting the speed fluctuation by using the compensation torque in the torque structure, that is, the compensation torque is converted into the oil quantity according to the map, and when the speed fluctuation is detected in each cycle, the vehicle controller according to The increase or decrease of a certain torque due to the fluctuation of the speed, and then calculate the amount of oil that needs to be increased or decreased, and inject it into the cylinder in the next cycle. [0003] The dual-fuel engine injects combustible gases such as gasoline, methanol, and natural gas through the port, and injects diesel into the cylinder. The combustion method of this engine reduces the fuel consumption and emissions of the engine. [0004] T...

AI Technical Summary

Problems solved by technology

[0004] The dual-fuel engine has speed fluctuations during acceleration and deceleration of the vehicle, and it is necessary to balance the speed fluctuations of the dual-fuel engine through an active vibration reduction method. In related technologies, the active vibration reduction method of the dual-fuel engine has the following problems. When the compensation torque is converted into In terms of oil quantity, the obtained fuel injection quantity includes gasoline oil quantity and diesel oil quantity. After the diesel oil is injected into the cycle, it will burn and do work in the cycle, but after the gasoline is injected, it will do work in the next cycle, which will cause asynchronous and active vibration reduction effect. Not good, there is room for improvement

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