Temperature-controllable glow plug assisted compression ignition methanol engine and control method thereof

A temperature-controllable glow plug assisted compression ignition methanol engine, comprising:

• an engine housing including a methanol engine water jacket,
• a methanol engine block,
• a methanol engine crankcase,
• an oil pan,
• wherein a top of the engine housing is provided with a methanol engine cylinder head, the engine housing is internally provided with a methanol engine crankshaft and methanol engine connecting rods driving the methanol engine crankshaft;
• methanol engine pistons are connected to upper ends of the methanol engine connecting rods, and cylinders are formed between the methanol engine cylinder head and the methanol engine pistons;
• the methanol engine cylinder head is provided with methanol engine exhaust manifolds, methanol injectors, temperature-controllable glow plugs and methanol engine intake manifolds;
• each of the methanol injectors and a corresponding one of the temperature-controllable glow plugs both extend into a corresponding one of the cylinders, and a throttle is arranged at an air intake of each of the methanol engine intake manifolds;
• and
• a pipeline configured for communicating the throttle with external air is provided with an air flowmeter;
• the methanol injectors, the temperature-controllable glow plugs and the throttle are controlled by an electronic control unit of the methanol engine;
• the electronic control unit is configured to perform regulation of temperature of each of the temperature-controllable glow plugs and opening of the throttle according to a current load state of the methanol engine;
• and the load state takes mean effective pressure of the methanol engine calculated according to a rotation speed and effective power of the methanol engine at a moment as a determination index.