ORI OF TODAY'S VEHICLES, PART II

Reduced coolant temperature studies showed an average decrease in ORI of about two units in two popular make engines and no effect in a third make. Coolant temperature had on significant effect on exhaust emissions from any of the engines tested. Tests conducted on gasoline "tail" end properties showed that gasoline endpoint had no effect on ORI, while an increase in polycyclic nuclear aromatics increased it. A managanse antiknock additive reduced ORI in one make engine. Lube oil metal additive type and type of viscosity index (VI) improver affected ORI whereas, sulfated ash content did not affect it. /GMRL/

• Corporate Authors:

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Authors:
  • Keller, B D
  • Meguerian, G H
• Publication Date: 1977

Media Info

• Pagination: 41 p.

Subject/Index Terms

• TRT Terms: Additives; Antiknock compounds; Aromatic hydrocarbons; Coolants; Engine knock; Exhaust gases; Gasoline; Ignition; Lubricating oils; Manganese; Octane number; Temperature; Viscosity
• Old TRIS Terms: Octane rating; Viscosity index
• Subject Areas: Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00158402
• Record Type: Publication
• Report/Paper Numbers: SAE 770195
• Files: TRIS
• Created Date: Dec 8 1977 12:00AM