Analysis on idle speed stability in port fuel injection engines

Conference · Wed Jan 01 04:00:00 EST 1986

OSTI ID:6652369

Yamaguchi, H; Takizawa, S; Sanbuichi, H; Ikeura, K

It has been reported by several researchers that the L-jetronic fuel injection system offers better idle speed stability than the D-jetronic one in port fuel injection engines. However, the volume between the throttle valve and the intake valves in the L-jetronic system acts as a first order lag element in the system and causes air-fuel ratio fluctuation which, in turn, induces idle speed hunting under certain conditions. This study employs computer simulation to determine the influence of three parameters on idle speed stability: flywheel inertia, intake manifold volume,and air-fuel ratio calibration. It also explores means of improving idle speed stability by controlling the air-fuel ratio and ignition timing.

• Research Organization: Nissan Motor Co., Ltd.
• OSTI ID: 6652369
• Report Number(s): CONF-8609188-
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
CALIBRATION
COMPUTERIZED SIMULATION
CONTROL
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
FLOW REGULATORS
FLYWHEELS
FUEL ECONOMY
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
FUEL-AIR RATIO
HEAT ENGINES
IGNITION SYSTEMS
INTAKE STRUCTURES
INTERNAL COMBUSTION ENGINES
JETS
MECHANICAL ENERGY STORAGE EQUIPMENT
MECHANICAL STRUCTURES
MOMENT OF INERTIA
OPERATION
PERFORMANCE
SIMULATION
STABILITY
TIMING PROPERTIES
VALVES
VELOCITY