Energy-saving environment-friendly internal combustion engine

Abstract

The invention relates to an energy-saving environment-friend internal-combustion engine, which comprises a burning room (6) and a distribution phase. Wherein, the chamber (5) of burning room has one burning room piston (4) whose bottom (9) has one or several external springs (7) that making said burning room piston (4) reciprocally move along the central line of burning room (6); the inlet gate and the outlet gate will make the lift range between 0mm and 1mm when the exhaust range is over. The invention can reduce the waste gas of burning room, and avoid reflux, to obtain better high-speed and low-speed property of internal-combustion engine.

Description

Technical field: [0001] The invention relates to an internal combustion engine, which includes a combustion chamber and valve timing. Background technique: [0002] In order to improve the ventilation efficiency, the traditional internal combustion engine is equipped with a valve overlap angle. During the valve overlap period, the intake pipe, cylinder and exhaust pipe are connected as one. Since the gas pressure in the intake pipe is greater than the gas pressure in the exhaust pipe, the fresh charge This stage is called combustion chamber scavenging, and the valve overlap angle is conducive to cleaning the residual exhaust gas in the combustion chamber and increasing the fresh charge. When the pressure inside the tube is very low, backflow of exhaust gas may occur, reducing the intake air volume and affecting the combustion conditions. High-speed internal combustion engines generally use larger valve overlap angles to clean up more residual exhaust gas, thereby adding mor...

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Problems solved by technology

[0002] In order to improve the ventilation efficiency, the traditional internal combustion engine is equipped with a valve overlap angle. During the valve overlap period, the intake pipe, cylinder and exhaust pipe are connected as one. Since the gas pressure in the intake pipe is greater than the gas pressure in the exhaust pipe, the fresh charge This stage is called combustion chamber scavenging, and the valve overlap angle is conducive to cleaning the residual exhaust gas in the combustion chamber and increasing the fresh charge. When the pressure inside the tube is very low, backflow of exhaust gas may occur, reducing the intake air volume and affecting the combustion conditions

High-speed internal combustion engines generally use larger valve overlap angles to clean up more residual exhaust gas, thereby adding more fresh charge and improving the power output of the internal combustion engine. However, larger valve overlap angles are easy to The exhaust gas in the exhaust pipe flows back into the cylinder and intake pipe, which reduces the low-speed performance of the internal combustion engine

[0003] Chinese patent specification ZL01206249.9 discloses an internal combustion engine with a valve overlap angle set to 0°. This internal combustion engine is an improvement aimed at preventing the backflow of exhaust gas. In the valve timing of this internal combustion engine, the early opening angle of the intake valve and exhaust valve delay closing angle are set to 0°, and the intake and exhaust valves are closed at the top dead center at the same time, thereby avoiding the exhaust gas backflow phenomenon, so the internal combustion engine ensures good low-speed performance, but because the internal combustion engine does not have During the scavenging process of the combustion chamber, the residual exhaust gas in the combustion chamber increases, thereby reducing the fresh charge, and at higher speeds, the power of the internal combustion engine decreases

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