Introduce

Carburetor Diaphragms are rubber components used in automobile carburetors that have a thin, flexible structure, usually in the shape of a disk or saucer, with one or more important elastic areas that allow the diaphragm to move It deforms when subjected to negative pressure or vacuum force, thereby achieving the suction and injection of fuel.

Technical data

Material FVMQ
Density (g/cm³) 1.35 – 1.45
Hardness (Shore A) 50 – 80
Tensile strength (MPa) 5 – 15
Elongation at break (%) 100 – 300

Certification standards

  • ISO 9001 is a globally recognized quality management system certification that applies to all types of manufacturers and ensures that their products meet quality management and manufacturing standards.
  • ISO/TS 16949 is a certification standard for the automotive industry that supplements ISO 9001 and emphasizes the unique requirements and standards of the automotive industry.
  • ASTM D2000 is a set of specifications for rubber products that defines the requirements for the material’s physical properties and testing methodology. A guideline established by the American Society for Testing and Materials to categorise and define rubber and rubber-made commodities. It outlines the criteria for performance and methods of testing with regard to diverse rubber materials.
  • SAE J200: A criterion formulated by the Society of Automotive Engineers to categorise and specify rubber materials. The document outlines the performance requirements and testing methods for rubber materials and their application in various automotive products.
  • Compliance with Reach Certification is necessary in accordance with chemical management regulations as formulated by the European Union. All carburetor diaphragms involving chemical substances must adhere to Reach requirements.

Main features and benefits

  1. Fuel supply control：allows carburetor diaphragms to adjust fuel supply volume based on negative pressure or vacuum force in the engine intake system. Under negative pressure, the diaphragm deforms and extracts fuel from the fuel pool, injecting it into the engine’s intake passage. Under negative pressure, the diaphragm deforms and extracts fuel from the fuel pool, injecting it into the engine’s intake passage. Under negative pressure, the diaphragm deforms and extracts fuel from the fuel pool, injecting it into the engine’s intake passage. This ensures proper fuel and air mixture ratio for combustion efficiency and optimal engine performance.
  2. Fuel injection control is also included. The diaphragm’s elasticity allows it to regulate the injection of fuel by controlling the injection time and amount. It adapts the fuel injection speed and quantity based on changes in negative pressure within the engine to align with the fuel requirements of the engine under varying load and speed conditions. This facilitates seamless acceleration and fuel efficiency.
  3. Additionally, the carburettor diaphragms demonstrate remarkable sealing capabilities, owing to their strong elasticity and plasticity. Ensuring the normal operation of the carburettor system and preventing fuel leakage are essential. Good sealing performance is crucial for accurate and reliable fuel supply.
  4.  Additionally, the automotive carburettor diaphragms are commonly made of materials with excellent oil and chemical resistance, such as rubber or FVMQ. This enables the diaphragm to function seamlessly for extended periods of time in fuel and chemical solvent environments without corrosion or damage.
  5. High temperature resistance: Automobile carburetor diaphragms require high levels of temperature resistance to endure the high temperature circumstances produced when the engine is in operation. Superior quality diaphragm materials are capable of maintaining dependable performance in high temperature conditions without weakening or distorting due to elevated heat levels.

Conclusion

Carburetor diaphragms are rubber components used in automobile carburetors with a thin, flexible structure. They have a material FVMQ and are certified by ISO 9001, ISO/TS 16949, ASTM D2000, SAE J200, and Reach Certification. These diaphragms have features such as fuel supply control, fuel injection control, and magnificent sealing capabilities. They can adjust fuel supply volume based on negative pressure or vacuum force in the engine intake system, ensuring proper fuel and air mixture ratio for combustion efficiency and optimal engine performance. They also regulate fuel injection speed and quantity based on changes in negative pressure within the engine, facilitating seamless acceleration and fuel efficiency. Carburetor diaphragms are made of materials with exquisite oil and chemical resistance, such as rubber or FVMQ, allowing them to function seamlessly in fuel and chemical solvent environments without corrosion or damage. They also require high temperature resistance to endure high temperature conditions.