What are the common P/M parts in automobiles?

What are the common P/M parts in automobiles?

At present, the average consumption of powder metallurgy products per vehicle in Europe is 14kg, that in Japan is 9kg, and that in the United States has reached more than 19.5kg. It is estimated that it may reach 22kg in the next few years. At present, the average consumption of powder metallurgy products per vehicle in China is only 5~6kg. Considering the factors of energy conservation and emission reduction, domestic enterprises will use more powder metallurgy processes to produce auto parts in the future. What are the common P/M parts in automobiles? Here is a brief introduction of the Zhongwei Precision Editor:

Powder metallurgy parts

In fact, there are many applications of powder metallurgy in automobile parts, such as shock absorber parts, deflectors, pistons and low valve seats in automobile chassis; There are ABS sensors, brake pads, etc. in the braking system; Pump parts mainly include key parts of fuel pump, oil pump and transmission pump; In the engine, there are guides, seat rings, connecting rods, bearing seats, key components of variable valve timing system (VVT), exhaust pipe supports, etc; There are synchronous hub, planetary carrier and other parts in the transmission.

1. VVT powder metallurgy parts

VVT or VCT (variable cam timing system) is a system that adjusts the phase of the engine cam through the equipped control and execution system, so that the opening and closing time of the valve changes with the engine speed, so as to improve the inflation efficiency and increase the engine power. Its principle is to adjust the intake and exhaust volume, valve opening and closing time and angle according to the operation of the engine, so as to make the intake air volume better, improve the combustion efficiency and reduce emissions. Its advantages are fuel saving and power improvement.

2. Powder metallurgy parts in oil pump

At present, the engine oil pump and the automatic transmission oil pump mostly use the constant displacement oil pump. The constant displacement oil pump is generally an external gear pump, an internal gear cycloidal pump or an internal gear pump and other structures. The oil output of fixed displacement oil pump increases with the increase of engine speed, and the relationship between them is linear. In order to ensure the low oil output at low speed and the small oil pressure at high speed, the oil pump will be designed to be larger, which puts forward higher requirements for the layout of the engine compartment. At the same time, when the engine is at a high speed, the excess lubricating oil will return from the oil circuit, resulting in increased engine power consumption. The variable displacement oil pump will adjust the oil pressure and oil volume according to the working conditions of the engine, so as to achieve the purpose of oil saving. The principle of sliding vane variable displacement pump is basically the same as that of vane variable displacement pump, and the flow is adjusted by adjusting the eccentricity. The sliding vane is a steel piece, the intermediate sleeve is connected with the sliding vane, the sliding sleeve is outside, and the rotor is in the middle. These three pieces are all powder metallurgy pieces.

3. Car tailgate parts

The shaft sleeve is mainly processed by powder metallurgy in the spare parts of automobile tailgate. The shaft sleeve is a cylindrical mechanical part sleeved on the shaft, and is a component of the sliding bearing. The shaft sleeve is made of 45 steel, and its process requires one-time forming without cutting, which is just in line with the powder metallurgy technology, which is an important reason why powder metallurgy is used in automobile tailgate parts.

The above is a few common automobile P/M parts shared by Zhongwei Precision Editor, which is not limited to the above points. As we all know, many spare parts in automobiles are made of gears, which are made by powder metallurgy process. With the development of the automobile industry and the requirements of energy conservation and emission reduction, powder metallurgy technology has been applied more and more in the automobile parts industry, and many metal parts will be produced by metallurgical process.