Control method and control device of rotating speed of engine and rotating speed controller

Abstract

The invention provides a control method and control device of rotating speed of an engine and a rotating speed controller. The method comprises the steps that when the engine is in the idling condition and receives a switching signal used for representing idling / rated rotating speed switching, the current water temperature of the engine is obtained; whether the current water temperature is largerthan the preset water temperature threshold value or not is judged; if the current water temperature is not larger than the preset water temperature threshold value, according to the first preset acceleration condition, the engine is controlled to carry out accelerated operation; when acceleration of the engine is finished, whether the current rotating speed of the engine is equal to the rated rotating speed or not is judged; if the current rotating speed is not equal to the rated rotating speed, the engine is controlled to maintain the current rotating speed preset duration, and execution ofthe step of obtaining of the current water temperature of the engine is returned. The method can be combined with the current water temperature of the engine, the engine acceleration is automaticallycontrolled, medium rotating speed maintaining time is prolonged to achieve the precise adjusting needs, and the problem that under the low-temperature condition, engine acceleration is too fast, and smoke rising happens can be relieved and even solved.

Description

technical field [0001] The present invention relates to the technical field of engine control, and more specifically, relates to an engine speed control method, a control device and a speed controller. Background technique [0002] The electronic governor is a device that uses an electronic system to adjust the fuel supply of the fuel injection pump to limit and stabilize the engine speed. It mainly includes a speed controller and an electromagnetic actuator. [0003] The speed controller is externally connected with an idle speed / rated speed switching switch. The engine runs at idle speed. When the above switch is closed, the speed controller will output drive current to the electromagnetic actuator to change the output position of the electromagnetic actuator to drive the rack of the fuel injection pump, thereby controlling the engine to accelerate from the idle speed to the rated speed. Rotating speed. [0004] However, the acceleration time of the traditional tachomete...

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Problems solved by technology

[0004] However, the acceleration time of the traditional tachometer is fixed, once the engine accelerates too fast in a low temperature environment, there will be smoke problems

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