Effect of variable engine valve timing on fuel economy
Conference
·
OSTI ID:6557369
Variable Valve Timing (VVT) has been demonstrated by other authors as a means of improving engine performance and idle quality. The possibility of improving fuel economy as well with VVT is investigated here. The effect of VVT on the mechanical efficiency of the engine is a crucial design factor affecting fuel economy. A number of concepts are evaluated with experimental and computer modelling results. Among these, Late Intake Valve CLosing (LIVC) is shown to be a practical concept applicable to engines with two intake valves per cylinder where the intake valves can be phased relative to each other to extend the total intake opening period.
- OSTI ID:
- 6557369
- Report Number(s):
- CONF-880241-
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
COMPUTERIZED SIMULATION
CONTROL EQUIPMENT
CYLINDERS
EFFICIENCY
ENGINES
EQUIPMENT
FLOW REGULATORS
FUEL ECONOMY
FUEL SYSTEMS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MECHANICAL EFFICIENCY
OPERATION
PERFORMANCE
SIMULATION
TIMING PROPERTIES
VALVES
330100* -- Internal Combustion Engines
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
COMPUTERIZED SIMULATION
CONTROL EQUIPMENT
CYLINDERS
EFFICIENCY
ENGINES
EQUIPMENT
FLOW REGULATORS
FUEL ECONOMY
FUEL SYSTEMS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MECHANICAL EFFICIENCY
OPERATION
PERFORMANCE
SIMULATION
TIMING PROPERTIES
VALVES