Joints de moteurs automobiles

New Definition of Automotive Engine Seals

Introduction of Automotive engine seals

With the rapid development of the automobile industry, the temperature of the automobile engine room increases, the use of modified fuel and highly corrosive engine fuel is becoming more and more common, and fluororubbers are more widely used as sealing materials for automobiles than ever before. In order to improve the power of automobile engine, save fuel and ensure the safety of automobile driving, a new fuel injection system appears. In this system, the car flows from the fuel tank to the engine and back again, and the gasoline mixes with oxygen to produce hydroperoxide. Gasoline containing hydrogen peroxide is called “acid gasoline”, which can soften or harden a variety of hydrocarbon rubber. The fluorine rubber will not deteriorate due to contact with acidic gasoline. Fluorine rubber has very low permeability for most substances, and also has excellent performance in low antioxidant automotive fuel penetration. As a result, Automotive engine seals will also have better performance.

Features of Automotive engine seals

The modern automobile industry has put forward higher and higher requirements for seals (such as small size, high temperature/pressure resistance, excellent physical/chemical properties, etc.), and the sealing performance is an important indicator to evaluate the quality of automobiles. The sealing ring is an important form of static sealing for automobiles, and there are 100 to 400 sealing rings used on automobiles. These seals are widely used in large assemblies such as engine and accessory systems, transmission systems, steering systems, braking systems, and small assemblies such as pumps and valves to seal the liquid and gas inside the car and prevent the intrusion of external rain and dust.

Due to the sealing medium, sealing structure, sealing pressure, sealing part temperature, sealing shaft or groove and other dual surface material, finish and flatness are different, the structural design of the sealing ring and the material used are also different. All kinds of automotive rubber seals need to withstand high temperature, low temperature, pressure and various corrosive media (such as high temperature mixed gas) when working. The role of all kinds of grease, brake fluid and coolant, etc.), which is a severe test for rubber materials and sealing structures. Automotive engine seals are an important part of our cars, and if they fail, it will affect our travel and time. So we must pay more attention to the choice.

Characteristics of Automotive engine seals

▲It has good mechanical properties

Fluorine rubber has excellent physical and mechanical properties. Automotive engine seals are well suited to use fluororubber as a material.

▲ It has good high temperature resistance

Automotive engine seals can be used at very high temperatures and protect the operation of the engine, greatly increasing the use time of the engine.

▲Excellent chemical stability

Excellent oil resistance, a wide range of solvents, especially in acid and alkali, aliphatic and animal and vegetable oils, Automotive engine seals prevent system leakage.

Why choose Viton

Due to its excellent heat resistance and dielectric resistance, Viton products have been widely used in the automotive industry. It is mainly used in the following systems: crankshaft seal, valve stem seal, gearbox seal in power system; Fuel hoses in fuel systems, fuel hoses and pipes in fuel tanks, pump seals, diaphragms. Injector type 0 ring, accelerator pump cup, filter cover and seal, carburetor nozzle, etc.