The structure of the engine cylinder head

Abstract

The invention relates to a structure of an engine cylinder head. A camshaft supporting base is arranged on a cylinder head body, and a camshaft is arranged on the camshaft supporting base. A decompression device is mounted on the side, adjacent to an exhaust cam, of the camshaft. The cylinder head body is provided with an air inlet port and an air exhaust port, and an igniter mounting hole is formed in the side, where the decompression device is mounted, of the cylinder head body. The igniter mounting hole allows an igniter to be mounted. The structure of the engine cylinder head is characterized in that the igniter mounting hole is formed in the cylinder head body in the mode of deflecting towards the side of the air inlet port; after the igniter is mounted in the igniter mounting hole, the igniter deflects towards the air inlet port; accordingly, after the igniter is mounted in the igniter mounting hole, an electrical connecting part, exposed out of the cylinder head body, of the igniter can deflect the projection range of the camshaft, and the igniter cannot disturb the side of the camshaft which is provided with the decompression device, so that when the camshaft of the cylinder head body is provided with the decompression device, and the size of the cylinder head body in the width direction is not increased; meanwhile, the disturbance of the igniter and other parts to products is avoided, and the service effect of an engine is improved.

Description

technical field [0001] The invention relates to a structure of an engine cylinder head, in particular to a structure of an engine cylinder head which can prevent the volume of the cylinder head installed with a decompression device from becoming larger in the width direction. Background technique [0002] Such as figure 1 As shown, the engine 1 has a cylinder head 11, which is provided with a camshaft support seat 12 for the camshaft 13 seat, and the cylinder head 11 is equipped with an igniter 14 directly below the camshaft 13, The igniter 14 is sheathed with an electrical sleeve 141, and the igniter 14 is installed on the cylinder head 11 at an angle with the side of the cylinder head 11 on which the igniter 14 is installed, thereby preventing the engine 1 from The volume in the width direction of the cylinder head 11 is enlarged. [0003] Such as figure 2 As shown, in order to avoid starting the engine 1, the compressed fresh air resistance is too large when the pisto...

AI Technical Summary

Problems solved by technology

[0005] Yet because after this engine 1 is provided with a decompression device 16 on one side of this camshaft 13, for avoiding this igniter 14 and this camshaft 13 that decompression device 16 is installed to interfere, this igniter 14 must be with this The center line of the cylinder head 11 forms a relatively large angle, and is installed on the cylinder head 11, that is, the igniter 14 is set up against the cylinder body 19; more specifically, the igniter for the igniter 14 installation is The distance D between the center point T of the outer hole of the igniter installation hole 111 and the cylinder centerline C is a relatively wide distance D, and the included angle θ between the centerline C 1 of the igniter installation hole 11a and the cylinder centerline C The included angle θ is a relatively large angle; this kind of arrangement of igniter 14 toward the cylinder body 19 will cause the volume of the cylinder head 11 to expand in the width direction, and will cause the cylinder head 11 of the engine 1 to interact with other parts. interference

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