Engine friction-Effect of oil viscosity and break-in on cranking resistance

Book · Sun Jan 01 00:00:00 EST 1984

OSTI ID:5911199

Sanvordenker, K

A simple technique of tracing the deaccelaration of an engine upon shut off is used to determine the cranking resistance of small single cylinder utility engines under different ambient conditions. The technique is also used to differentiate the frictional losses from the mechanical losses during cranking, without the aid of a dynamometer. Viscosity of the crankcase oil is found to be the single most important property of the oil which correlates with cranking resistance. Considerable improvement in crankability can be attained by polishing of the engine bore, but only at the risk of increased wear under normal operating conditions.

• OSTI ID: 5911199
• Report Number(s): SAE-TP-841095
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
02 PETROLEUM
INTERNAL COMBUSTION ENGINES
FRICTION
LUBRICATING OILS
VISCOSITY
ACCELERATION
CYLINDERS
ENERGY LOSSES
IGNITION QUALITY
MECHANICAL EFFICIENCY
POLISHING
ROUGHNESS
WEAR RESISTANCE
EFFICIENCY
ENGINES
HEAT ENGINES
LOSSES
LUBRICANTS
MECHANICAL PROPERTIES
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
SURFACE FINISHING
SURFACE PROPERTIES
330100* - Internal Combustion Engines
023000 - Petroleum- Properties & Composition