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

Cylinder head manufacturing method and cylinder head blank

A manufacturing method and technology of cylinder head, applied in the direction of cylinder head, cylinder, machine/engine, etc., can solve problems such as deviation of engine fuel efficiency, output performance reduction, etc.

Active Publication Date: 2022-06-03
NISSAN MOTOR CO LTD
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the excess coating is formed in the intake ports and exhaust ports of the cylinder head, there is a problem that the size of the ports varies and the fuel efficiency and output performance of the engine decrease.

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 manufacturing method and cylinder head blank
  • Cylinder head manufacturing method and cylinder head blank
  • Cylinder head manufacturing method and cylinder head blank

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach 》

[0056] Next, a method of manufacturing the cylinder head 12 including the valve seat films 16b and 17b will be described. Figure 4 It is a process chart which shows the manufacturing method of the cylinder head 12 of this embodiment. As shown in the figure, the method of manufacturing the cylinder head 12 of the present embodiment includes a casting step (step S1 ), a cutting step (step S2 ), a covering step (step S3 ), and a finishing step (step S4 ).

[0057] In the casting step S1, the aluminum alloy for casting is poured into a mold in which a sand core is placed, and a cylinder head blank having an intake port 16, an exhaust port 17, and the like formed in the main body is cast-molded. The intake port 16 and the exhaust port 17 are formed by a sand core, and the recessed portion 12b is formed by a mold.

[0058] Figure 5 It is a perspective view of the cylinder head blank 3 cast and molded in the casting step S1 from the side of the mounting surface 12 a mounted on th...

no. 2 Embodiment approach 》

[0078] Next, the manufacturing method of the cylinder head 12 of 2nd Embodiment is demonstrated. In addition, the shape of the shielding curtain portion formed from the small-diameter portion 16c in the cutting step S2 and the function of the shielding curtain portion in the covering step S3 of this embodiment are different from those of the first embodiment, but other steps are the same as those of the first embodiment. Since the first embodiment is the same, the descriptions other than the cutting step S2 and the covering step S3 will be referred to and omitted from the first embodiment.

[0079] Figure 12A It is a cross-sectional view of the intake port 16 portion of the cylinder head blank 3, and the shapes of the annular valve seat portion 16f and the shielding curtain portion 16i formed in the cylinder head blank 3 by the cutting step S2 of this embodiment are shown by a two-dot chain line. The shielding curtain portion 16i of this embodiment includes an arc-shaped con...

no. 3 Embodiment approach 》

[0083] Next, a method of manufacturing the cylinder head 12 according to the third embodiment will be described. This embodiment includes a casting step, a cutting step, a cladding step, and a finishing step as in the first embodiment, but differs from the first embodiment in that a shielding plate that is a separate component from the cylinder head blank is used as the shielding curtain portion. 1 The embodiment is different. In addition, about the same structure as 1st Embodiment among the structure of 3rd Embodiment, the same code|symbol is used and detailed description is abbreviate|omitted.

[0084] Figure 13A It is a cross-sectional view showing the intake port 16 of the cylinder head blank 3A formed by the casting process of this embodiment. Since the shielding curtain portion is an independent component, the cylinder head blank 3A is not provided with a small diameter portion serving as the basis of the shielding curtain portion. The two-dot chain line in the drawi...

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

Manufactured with a ring protruding from the ring-shaped edge of the opening (16a) of the air inlet (16) or the ring-shaped edge of the opening (17a) of the exhaust port (17) toward the center (C) of the port The cylinder head blank (3) of the masking curtain (16g) is sprayed with metal powder (P) to the annular valve seat (16f) located on the outer side of the port than the masking curtain (16g) by cold spraying. A valve seat film (16b) is formed.

Description

technical field [0001] The present invention relates to a method for manufacturing a cylinder head of an internal combustion engine and a cylinder head blank used for the manufacture of the cylinder head. Background technique [0002] There are known sliding members including a coating layer composed of an aggregate of particles of a precipitation hardening type copper alloy on a base material, and a cold spray method blowing metal powder containing a precipitation hardening type copper alloy onto the base material to form the above-mentioned sliding member. The method of manufacturing the sliding member of the coating layer (Patent Document 1). [0003] In addition, in the invention of Patent Document 1, as an attempt to utilize a sliding member for an internal combustion engine, a metal powder containing a precipitation-hardening copper alloy is blown onto a seat portion of an engine valve of a cylinder head by a cold spray method to provide the aforementioned coating laye...

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
Patent Type & Authority Patents(China)
IPC IPC(8): F02F1/24C23C24/02F01L3/04
CPCF02F1/24C23C24/08C23C24/082C23C24/085C23C24/087F01L2013/105F01L3/02F01L2301/02F01L2303/00B22D15/02B22D29/001C23C24/04F01L3/04F02F2200/06
Inventor 大森雅弘柴山博久八下田健次
Owner NISSAN MOTOR CO LTD