The cylinder is where the gas mixture (gasoline and air) burns. The cylinder accommodates the piston for reciprocating motion. The cylinder head is equipped with an electric spark plug (commonly known as an electric nozzle) to ignite the mixture, as well as intake and exhaust valves. When the engine is working, the temperature of the cylinder is very high, so there are many cooling fins on the outer wall of the cylinder to expand the heat dissipation area. The arrangement of the cylinders on the engine casing (casing) is mostly star-shaped or V-shaped

2023

Manufacturing method of internal combustion engine piston blank

The piston is called the "heart" of the internal combustion engine. It is not only closely related to the performance, emissions, and economy of the internal combustion engine, but also directly related to the reliability of the internal combustion engine; most of the existing piston structures are shown in Figure 1. The cooling oil passage 12, the ring bank 13, the piston pin hole and the skirt 14 are composed of four parts. The internal combustion engine piston works under the harsh conditions of high temperature, high pressure, high speed and poor lubrication. Serious and poor heat dissipation conditions, so the temperature of the piston is very high when it is working, especially its top can reach 600-700K; in addition, because the pressure of the gas on the top of the piston is very high, the top of the piston must bear a strong impact when it is working.

2023

What are the technical requirements for internal combustion engine pistons

When the temperature changes, the size and shape change should be small, and the minimum gap between the cylinder wall and the cylinder wall should be kept.

2023

Internal combustion engine piston structure

The main function of the piston is to withstand the combustion pressure in the cylinder and transmit this force to the crankshaft through the piston pin and connecting rod. In addition, the piston also forms the combustion chamber together with the cylinder head and cylinder wall.

2023

Piston Working Conditions

Large heat load: when the piston is working in the cylinder, the top surface of the piston bears the action of transient high-temperature gas, and the highest temperature of the gas can reach 2000~2500 C, so the temperature of the piston top is also very high. Inhomogeneous temperature distribution with high thermal stress:

2023

Piston Design of Automobile Internal Combustion Engine

The fierce competition in the automobile market has prompted the manufacturers to greatly shorten the product development cycle; the rapid development of the engine towards supercharging, high power, and light weight has made researchers pay more attention to the improvement of the engine structure. As the heart of the engine, the piston is a component with relatively high technical content. Due to its harsh working conditions, high mechanical and thermal loads often lead to cracking of the piston pin seat, early wear of the ring groove, thermal cracking of the throat edge of the combustion chamber on the top surface of the piston, and other faults.

2023

< 1 >

Tel : +86-13356282977
WhatApp：+86-13356282977
Email : dhlwuk@163.com
Add : North workshop, 300m east of the intersection of Fenghuang 4th Road and wutong 9th Road, Binbei Street, Bincheng District, Binzhou City, Shandong Province

微信扫一扫