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

Cylinder heads for internal combustion engines

A technology for cylinder heads and internal combustion engines, applied to cylinder heads, cylinders, mechanical equipment, etc., which can solve problems affecting durability and achieve the effect of suppressing local stress concentration and ensuring rigidity

Active Publication Date: 2021-01-22
TOYOTA JIDOSHA KK
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Local stress is concentrated in this way on the overlay formed as the valve seat, which may affect durability

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 heads for internal combustion engines
  • Cylinder heads for internal combustion engines
  • Cylinder heads for internal combustion engines

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] figure 1 is a partial sectional view of the internal combustion engine 1 . The internal combustion engine 1 is, for example, a gasoline engine. The internal combustion engine 1 includes a cylinder block 10 and a cylinder head 20 assembled to an upper portion of the cylinder block 10 . A plurality of cylinders 14 are formed in the internal combustion engine 1 , and a piston 15 reciprocating within a predetermined range is provided in each cylinder 14 . A combustion chamber CC is defined between the cylinder head 20 and a top surface 151 of the piston 15 in which an air-fuel mixture containing fuel and intake air is combusted. The cylinder head 20 is provided with an intake port 22 to introduce intake air into the combustion chamber CC, and an exhaust port 32 to exhaust exhaust gas from the combustion chamber CC. In addition, the cylinder head 20 is provided with port injection valves (not shown) to inject fuel into the corresponding intake ports 22, and spark plugs (n...

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 relates to cylinder heads for internal combustion engines. A cylinder head for an internal combustion engine includes: a first valve and a second valve, the first valve and the second valve being an intake valve or an exhaust valve; a first peripheral wall portion defining a first port, the The first port is opened and closed by the first valve and communicates with the combustion chamber; and a first overlay part formed on the first peripheral wall part and serving as a first valve seat, the first overlay part is formed on the first peripheral wall part and serves as a first valve seat. A valve is seated on the first valve seat.

Description

technical field [0001] The invention relates to a cylinder head for an internal combustion engine. Background technique [0002] In a cylinder head for an internal combustion engine, a weld overlay is formed by supplying molten metal material to an inner peripheral groove portion formed on the inner side of a peripheral wall portion defining a port, and this weld overlay is used as a valve seat. For example, in Japanese Unexamined Patent Application Publication No. 2015-048789, a surfacing part is formed by a laser cladding process. [0003] Meanwhile, the cylinder head is provided with a thick portion on a part of the peripheral wall portion in some cases in order to secure rigidity against combustion pressure. It is desirable to locate such a thick portion near the center of the combustion chamber where high combustion pressure tends to act. [0004] During the formation of the overlay on the inner peripheral groove portion of the peripheral wall portion as described abo...

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): F02F1/24F02F1/42
CPCF02F1/24F02F1/4214B23K26/34B23K26/0006B23K2101/006B23K2101/003B23K2103/12B23K26/144F02F1/4285F02F2001/008F01L3/02F01L3/22B23K26/21F02F2001/245F02F2200/00
Inventor 冲村稔驹田笃史山本康博
Owner TOYOTA JIDOSHA KK