Unlock instant, AI-driven research and patent intelligence for your innovation.

Cylinder head connection structure

A technology of connecting structure and cylinder head, applied in the direction of cylinder head, cylinder, engine components, etc., can solve the problems of reduced operation efficiency, reduced cylinder production efficiency, etc., to improve production efficiency, stable sealing, and restrain axial force. The effect of bias

Active Publication Date: 2012-02-01
MITSUBISHI MOTORS CORP
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the technology of the above-mentioned Japanese Patent Application Laid-Open No. 6-346781, since bolts with different shaft diameters are used, threaded holes with different diameters must be formed in the cylinder body, which reduces the production efficiency of the cylinder body.
Moreover, since the same tool cannot be used when the bolts are tightened, the bolts must be tightened in different processes, so there are defects such as reduced operational efficiency during assembly.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cylinder head connection structure
  • Cylinder head connection structure
  • Cylinder head connection structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] Hereinafter, the present invention will be described with reference to the accompanying drawings.

[0019] figure 1 It is a side view showing the assembled state of the cylinder head 2 of the engine 1 of the present embodiment. figure 2 It is a plan view showing the assembled state of the cylinder head 2 . image 3 It is a cross-sectional view of the cylinder head 2, and shows the cross-section of the bolt 7a on the exhaust side at the tightening position.

[0020] The engine 1 of the present embodiment is an inline four-cylinder engine, and two intake valves 3 and two exhaust valves 4 are provided in each cylinder.

[0021] like figure 1 As shown, the cylinder head 2 is attached to the upper surface of the cylinder block 5 of the engine 1 with the gasket 6 interposed therebetween. The cylinder head 2 and the cylinder block 5 are connected by bolts 7, and a threaded hole 5a into which the bolt 7 is screwed is formed in the cylinder block 5. On the other hand, the c...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a cylinder head connecting structure. In the cylinder head connection structure for connecting the cylinder head (2) to the cylinder block (5) of the engine (1), the bolts (7a), (7b), (7c) The bolt (7a) used to connect the part near the exhaust port (14) is a bolt of low hardness material, that is, under the same tightening torque, the axial force is smaller than that of other bolts (7b), (7c). force.

Description

technical field [0001] The invention relates to a connecting structure of an engine cylinder head, in particular to a structure in which a plurality of bolts are used to connect the cylinder head and the cylinder block. Background technique [0002] The cylinder head of the engine is mounted on the upper part of the cylinder block with a gasket interposed therebetween, and is connected to the cylinder block by a plurality of bolts. The bolts are arranged around the combustion chamber at appropriate intervals, and the same bolts are generally used and fastened with the same tightening torque. [0003] However, the operation of the engine increases the temperature of the engine, which results in a decrease in the hardness of the cylinder head. In particular, since the temperature of the portion near the exhaust port rises higher than that of other portions, the hardness is lowered, and therefore, the allowable surface pressure of the contact surface (bearing surface) of the c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F02F1/24
Inventor 林诚冈俊彦杉村速人野口泰彦铃木谦二
Owner MITSUBISHI MOTORS CORP