The Development of Lubricants for Automotive A/C Systems
نویسنده
چکیده
The lubricant is a critical component of an automotive AJC system. Besides providing good lubricity, it must exhibit sufficient solubility in the refrigerant to ensure lubricant return to the compressor. Stability in the presence of the refrigerant, metals, and common contaminants such as air, water, and mineral oil is critical. The lubricant must also be compatible with the hoses and other elastomeric parts. This paper will focus on the development of polyalkylene glycol (PAG) lubricants for use in automotive AJC systems. It will review the properties of PAG lubricants that has led to their use with R134a, including their good solubility, stability, and lubricity. The tradeoffs between competing properties such as lubricity and high temperature solubility will also be discussed.
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