Method for reducing petrol engine low-temperature starting-up time

Abstract

The invention provides a method for reducing the time of starting a gasoline engine at low temperature, which relates to the cold-start of the gasoline engine and aims to start the gasoline engine quickly in cold weather, prevent the engine being flooded and achieve environmental protection and energy conservation. The invention is characterized in that when the gasoline engine is started at low temperature, a control unit determines whether water temperature of the engine is lower than a set value or not through a sensor, if so, within a period from the time that the sensor detects a speed signal of the engine to the time that the engine rotates for two turns, the engine rotates and the control unit controls an oil atomizer not to atomize oil, after the engine idly runs for two turns, the oil are atomized, and the temperature of a cylinder is raised through the compression stroke and friction of the previous two turns, so that more gasoline can be evaporated; meanwhile, the control unit controls a spark plug to continuously ignite fire for two times so as to increase the chance of ignition; if not, the ignition and the oil injection directly enter normal oil injection and ignition for starting and enter the normal running state.

Description

technical field [0001] The method for reducing the low-temperature starting time of a gasoline engine relates to the field of gasoline engine starting. Background technique [0002] As we all know, gasoline is volatile, but its volatility is very poor in low-temperature environments, so the starting performance of gasoline engines at low temperatures often cannot meet the needs of users for quick starts. The technical solution adopted at this stage is to increase the fuel injection volume when starting at low temperatures. The air-fuel ratio required for ignition is achieved by accumulating a small amount of volatilized gasoline each time. This method makes the starting time of the engine longer, and most of the fuel does not participate in combustion but is discharged with the exhaust gas. If the amount of fuel added is too large, It is easy to cause the cylinder to be flooded. Once the cylinder is flooded, it cannot be started. The fuel in the cylinder must be cleared and ...

AI Technical Summary

Problems solved by technology

[0002] As we all know, gasoline is volatile, but its volatility is very poor in low-temperature environments, so the starting performance of gasoline engines at low temperatures often cannot meet the needs of users for quick starts. The technical solution adopted at this stage is to increase the fuel injection volume when starting at low temperatures. The air-fuel ratio required for ignition is achieved by accumulating a small amount of volatilized gasoline each time. This method makes the starting time of the engine longer, and most of the fuel does not participate in combustion but is discharged with the exhaust gas. If the amount of fuel added is too large, It is easy to cause the cylinder to be flooded. Once the cylinder is flooded, it cannot be started. The fuel in the cylinder must be cleared and the spark plug must be removed to dry before restarting. This not only causes users to complain, but also wastes gasoline and pollutes the environment.

Images