Homogeneous compression ignition internal combustion engine and its control system and control method

Abstract

The invention discloses a homogeneous compression ignition type internal combustion engine and a control system and a control method thereof. The internal combustion engine comprises a cylinder and a cylinder cover, a combustion chamber is arranged in the cylinder and above a piston; a combustion chamber volume instant regulating plunder capable of longitudinal moving and positioning on the cylinder cover is arranged on the cylinder cover and above the combustion chamber; the upper end of the combustion chamber volume instant regulating plunger extends out of the cylinder cover, and the lower end and the inner wall of the cylinder cover are in the same plane; a transmission mechanism connected with6 the combustion chamber volume regulating plunger is arranged at the upper end thereof, and the transmission mechanism is electrically connected with an electronic controller of an engine. The homogeneous compression ignition engine and the control system thereof drive the combustion chamber volume instant regulating plunger above the combustion chamber through the transmission mechanism, the combustion chamber volume instant regulating plunger enters the combustion chamber to change the volume of the combustion chamber; the aim of compression ignition can be still realized by the engine under various rotational speeds.

Description

technical field [0001] The invention relates to an internal combustion engine, in particular to a homogeneous compression ignition internal combustion engine and its control system and control method. Background technique [0002] Generally speaking, the working process of an internal combustion engine includes an intake stroke, a compression stroke, a power stroke and an exhaust stroke. During the power stroke, the engine generates electric sparks through the spark plug to ignite the combustible mixer in the cylinder and ignites and burns rapidly. Through the air pressure generated during gas combustion, the piston moves from the top dead center to the bottom dead center and drives the crankshaft through the connecting rod. Rotate outward output to do work. Existing internal combustion engine is divided into two classes by ignition mode: the one, ignition type, as the gasoline engine that generally uses now; The 2nd, compression ignition type, as the diesel engine that gen...

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Problems solved by technology

[0004] In addition, in the exhaust stroke, there is still a small amount of high-temperature and high-pressure exhaust gas in the cylinder when the exhaust ends. Sufficient, low efficiency of internal combustion engine, high carbon deposition, large environmental pollution, etc.

During cold start, the temperature of the cylinder body of the internal combustion engine and the temperature of the outside air are low, resulting in low internal energy of the mixture entering the cylinder, so that the compression ratio of the internal combustion engine during compression ignition is relatively high, and the compression during cold start cannot be achieved. burning situation

Moreover, since there is no waste gas heat energy to distill the liquid fuel, it is difficult to achieve the best state of homogeneous mixing of the mixed gas

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