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Gas-engine durability improvement. Final report, October 1985-September 1989. Volume 1

Technical Report ·
OSTI ID:6176017
; ; ;
A need to improve the durability of natural gas-fueled engines by eliminating or reducing exhaust valve and valve seat recession is addressed. A literature search was conducted and discussions were held with natural gas-fueled engine users, maintenance shops, engine manufacturers, valve and valve seat insert manufacturers to review the historical treatment of valve wear. Engines, equipped with various types of valve seat inserts, were used as test beds to obtain data relevant to the understanding of the mechanisms in exhaust valve recession, comparing the recession characteristics of various insert materials, and determining the influence of engine operating conditions on recession. Instrumentation was selected to monitor realtime valve recession, valve insert temperatures, and cylinder pressure. Each set of valves, inserts, valve guides, and springs were dimensionally recorded before and after testing. Each exhaust valve and insert was visually inspected after the test and selected components were examined using metallurgical techniques. The influence of valve and cylinder head design, operating conditions, and material characteristics are discussed.
Research Organization:
Southwest Research Inst., San Antonio, TX (USA)
OSTI ID:
6176017
Report Number(s):
PB-91-136341/XAB; SWRI--8868; CNN: GRI-5085-293-1179
Country of Publication:
United States
Language:
English

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Related Subjects

03 NATURAL GAS
034000 -- Natural Gas-- Combustion
33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
CHEMICAL REACTIONS
COMBUSTION
CONTROL EQUIPMENT
CORRELATIONS
DESIGN
DOCUMENT TYPES
ENERGY SOURCES
ENGINES
EQUIPMENT
FLOW REGULATORS
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HEAT ENGINES
INSPECTION
INTERNAL COMBUSTION ENGINES
MATERIALS
MEASURING INSTRUMENTS
MECHANICAL PROPERTIES
METALLURGY
NATURAL GAS
OPERATION
OXIDATION
PERFORMANCE TESTING
PRESSURE MEASUREMENT
PROGRESS REPORT
TEMPERATURE MEASUREMENT
TESTING
THERMOCHEMICAL PROCESSES
VALVES
WEAR
WEAR RESISTANCE