Air channel of engine cylinder cover

Abstract

The invention relates to an air channel of an engine cylinder cover. The air channel comprises an air inlet channel and an air exhaust channel, wherein the inlet of the air inlet channel is in a rectangular shape, and the outlet of the air exhaust channel is in a gourd-like shape; the curvature radius of a central trace line of the air inlet channel is increased from the inlet to the outlet in sequence; the air inlet channel is sequentially divided into a fuel injection area, a flow forming area and a vortex forming area from the inlet to the outlet, wherein the curvature radiuses of center track lines of the fuel injection area, the flow forming area and the vortex forming area are reduced in sequence, and the absolute value of the difference value of the curvature radius of the center track line of the fuel injection area and the curvature radius of the center track line of the flow forming area is smaller than the absolute value of the difference value of the curvature radius of thecenter track line of the vortex forming area and the curvature radius of the center track line of the flow forming area; the end, close to the fuel injection area, of the flow forming area is provided with a valve guide pipe mounting hole; and the curvature radius of the central trace line of the air exhaust channel is increased in sequence from the inlet to the outlet.

Description

technical field [0001] The invention relates to an engine cylinder head air passage. Background technique [0002] The intake port of the traditional engine cylinder head adopts an elliptical design, and the smallest cross section is mostly designed at the end of the intake port, that is, the position of the intake valve seat hole; the exhaust port is mostly designed in a circular shape, and the smallest cross section is mostly designed at the exhaust port. The front end of the passage, that is, the position of the exhaust valve seat hole, because the size of the combustion chamber determines the size of the intake and exhaust valve seat holes, so that the intake flow cannot be increased and the exhaust is not smooth. [0003] The air passages of the cylinder head are mainly spiral air passages and charging air passages, and auxiliary intake manifolds are added if necessary, which cannot fully utilize the air passage structure and improve engine performance. Contents of th...

AI Technical Summary

Problems solved by technology

[0002] The intake port of the traditional engine cylinder head adopts an elliptical design, and the smallest cross section is mostly designed at the end of the intake port, that is, the position of the intake valve seat hole; the exhaust port is mostly designed in a circular shape, and the smallest cross section is mostly designed at the exhaust port. The front end of the passage, that is, the position of the exhaust valve seat ring hole, because the size of the combustion chamber determines the size of the intake and exhaust valve seat ring holes, so that the intake air flow cannot be increased and the exhaust gas is not smooth

[0003] The air passages of the cylinder head are mainly spiral air passages and charging air passages, and auxiliary intake manifolds are added if necessary, which cannot fully utilize the air passage structure and improve engine performance

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