Designing a variable-stroke engine

Journal Article · Wed Jun 01 04:00:00 EDT 1977 · Automot. Eng. (N.Y.); (United States)

OSTI ID:7257178

Researchers at Sandia Laboratories, with ERDA support, are seeking refinement of the conventional reciprocating, internal combustion powerplant. The Pouliot engine--named for Sandia's H.N. Pouliot--is a five-cylinder, variable-displacement product of their efforts. Its innovative control of power output by varying piston stroke may well be a fruitful branch of internal combustion design. The operation principles of a variable displacement engine (VDE) are discussed, and the fabrication of a test VDE is described. The VDE has had over 130 hr of dynamometer operation, with no durability problems other than a bushing failure. In general, bsfc was in the 0.5 lb/hp-hr range, when averaged over a schedule of typical engine speeds and loads. Emissions data are given for brake specific HC, CO, and NO/sub x/ for the VDE operating free of emission controls. The researchers performed several simulated driving cycles as well.

• OSTI ID: 7257178
• Journal Information: Automot. Eng. (N.Y.); (United States), Journal Name: Automot. Eng. (N.Y.); (United States) Vol. 85:6; ISSN AUEGB
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
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330701 -- Emission Control-- Nitrogen Oxides
330702 -- Emission Control-- Carbon Monoxide
330704 -- Emission Control-- Hydrocarbons
AUTOMOBILES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
DESIGN
DYNAMOMETERS
ENERGY CONSUMPTION
ENGINES
EXHAUST GASES
FUEL CONSUMPTION
GASEOUS WASTES
HYDROCARBONS
INTERNAL COMBUSTION ENGINES
MEASURING INSTRUMENTS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OPERATION
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE TESTING
RESEARCH PROGRAMS
SIMULATION
SPARK IGNITION ENGINES
TESTING
VEHICLES
WASTES