Development of a Lubricant for Retrofitting Automotive Air Conditioners for Use with HFC-134a 940594
This paper presents a new refrigeration lubricant for use with the HFC-134a retrofit refrigerant in automotive air-conditioning systems originally designed to use the CFC-12 refrigerant, one of the regulated CFCs scheduled to be phased out. This new retrofit lubricant provides high lubricity and excellent performance characteristics as a result of adopting a newly developed PAG base oil with a block polymer structure and a new antiwear additive formulation. In retrofit systems, it assures sufficient durability for wobble-plate-type variable displacement compressors, which experience severe lubrication conditions.
Citation: Yokoo, S., Doi, K., Takano, T., and Kaimai, T., "Development of a Lubricant for Retrofitting Automotive Air Conditioners for Use with HFC-134a," SAE Technical Paper 940594, 1994, https://doi.org/10.4271/940594. Download Citation
