Double piston virtual five stroke internal combustion engine

Abstract

The double piston virtual five stroke internal combustion engine has one auxiliary piston over the main piston, combustor constituted in the gap between the main piston and the auxiliary piston, and repositioning part connected to the auxiliary piston for it to move far from the main piston. The repositioning part consists of a compression spring and a synchronous cam, the cam has so motion relation with the crankshaft that the cam moves with the flywheel on the crankshaft synchronously and the cam, the crankshaft have the same rotation period, and the maximum cam radius is equal to the effective crankshaft radius. The present invention has one increased pressure maintaining stroke, in which the pressure and temperature inside the cylinder is maintained in a short period after the piston passes through the upper dead point, and the fuel oil is ignited after the piston moves to some position favorable to outputting power. So, the induction stroke is shortened and the conversion efficiency is raised.

Description

technical field [0001] The invention belongs to the field of internal combustion engines. Background technique [0002] At present, the used engines of land transportation and marine equipment in the world are almost all four-stroke and two-stroke internal combustion engines, and four-stroke is the mainstream. [0003] In one working cycle of a four-stroke internal combustion engine, the crankshaft rotates two weeks, the piston goes up and down twice, and four strokes are taken. Taking the gasoline engine as an example, the four strokes are: [0004] (1). In the intake stroke, the piston moves from top to bottom, and the volume above the piston increases. At this time, the intake valve opens, the exhaust valve closes, and the combustible mixture is sucked into the cylinder. The intake stroke ends and the intake valve closes. [0005] (2). Compression stroke, the intake and exhaust valves are closed at this time, the crankshaft continues to rotate, and the piston moves from...

AI Technical Summary

Problems solved by technology

[0010] 1. The power deflagration timing of the internal combustion engine (that is, the moment when the spark plug ignites) is generally selected at an angle of about 10 degrees before the piston travels to the top dead center. After deflagration, the energy of the combustible mixture is released to the maximum. The arms are almost in a straight line, and the useful torque is almost equal to zero. At this time, it is very unfavorable to the output work, and only part of the energy of the combustible mixture can be used;

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