Titanium in engine valve systems
Titanium alloys offer a unique combination of high strength-to-weight ratio, good corrosion resistance and favorable high temperature mechanical properties. Still, their relatively high cost has discouraged consideration for widespread use in automotive components. Recent demands for increased fuel economy have led to the consideration of these alloys for use as valve train materials where higher costs might be offset by improvements in performance and fuel economy. Lighter weight valve train components permit the use of lower spring loads, thus reducing friction and increasing fuel economy. Camshaft friction measurements made on a typical small displacement engine indicate that a two-to-four percent increase in fuel economy can be achieved. Valve train components are, however, subject to a severe operating environment, including elevated temperatures, sliding wear and high mechanical loads. This paper discusses the details of alloy and heat treatment selection for optimizing valve performance.
- Research Organization:
- Ford Motor Co. in Dearborn, MI
- OSTI ID:
- 6766320
- Journal Information:
- J. Met.; (United States), Journal Name: J. Met.; (United States) Vol. 39:3; ISSN JOMTA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
330100* -- Internal Combustion Engines
36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
360104 -- Metals & Alloys-- Physical Properties
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
CONTROL EQUIPMENT
CORROSION RESISTANCE
COST
ENGINES
EQUIPMENT
FEASIBILITY STUDIES
FLOW REGULATORS
FRICTION
FUEL ECONOMY
HEAT ENGINES
HEAT TREATMENTS
INTERNAL COMBUSTION ENGINES
MATERIALS TESTING
OPTIMIZATION
PERFORMANCE
TEMPERATURE EFFECTS
TESTING
TITANIUM ALLOYS
VALVES
VEHICLES
WEAR
WEIGHT