Dual-glowplug based engine preheating method, system and vehicle

Abstract

The invention provides a dual-glowplug based engine preheating method, system and vehicle; the method comprises the following steps: determining an engine present work mode; controlling the dual-glowplug to simultaneously preheat the engine at a first preheating temperature if the engine is in a start mode; controlling at least one glowplug to preheat the engine at a second preheating temperature if the engine is in an idle and warm up mode, wherein the second preheating temperature is lower than the first preheating temperature; controlling the dual-glowplug to alternatively preheat the engine at a third preheating temperature if the engine is in a low temperature load running mode, wherein the third preheating temperature is lower than the second preheating temperature; controlling the dual-glowplug to simultaneously preheat the engine at a fourth preheating temperature if the engine is in a limited condition mode, wherein the fourth preheating temperature is between the first and second preheating temperatures. The novel method can preheat the engine when the vehicle is under various running conditions, and is high in preheating efficiency.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to an engine preheating method, system and vehicle based on double glow plugs. Background technique [0002] With the modern development of the automobile industry, the fuel economy, low emission characteristics, low-speed response and comprehensive performance of vehicle engines have become the objects of concern from all walks of life. Due to the higher combustion efficiency of diesel engines, the market is increasing by a certain proportion year by year. share. Affected by the combustion method and low temperature environment, diesel engines are less startable than gasoline engines, and they all need to be equipped with a preheating function to improve quick start characteristics. However, it is still difficult to achieve quick start and warm up for engines used in winter and cold regions. On the one hand Due to the physical properties of diesel oil, when the temperature in ...

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Problems solved by technology

Under partial load conditions such as low speed and small load or low speed and large load, the combustion temperature in the cylinder is lower than the normal temperature, the temperature of the gas at the end of compression is low, the best combustion efficiency is not exerted, and the fuel economy of the part load is poor. Carbon deposits in the ERG valve are prone to occur under load conditions

Before the intervention of the supercharger, under the condition of low exhaust gas temperature and exhaust gas energy, there is a lack of auxiliary in-cylinder preheating measures to promote the rapid combustion of fuel and air. There is a certain hysteresis in the response of the

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