Electronically controlled fuel injection device for an internal combustion engine

Patent · Tue Apr 04 04:00:00 EDT 1989

OSTI ID:5891495

Nakaniwa, S; Hoshino, Y; Tonisawa, N; Otani, S; Ariga, T; Furuhashi, S

An electronically controlled fuel injection device is described for an internal combustion engine comprising: a fuel injection means; a main fuel injection setting means which sets an amount of fuel to be injected, based on a detected amount of intake airflow for the engine and a detected engine velocity; an auxiliary fuel injection setting means which sets an amount of fuel to be injected, based on a detected engine velocity and an retrieved amount of intake airflow; a control region judgment means for selecting in a specific operating region for engine acceleration one of the main and auxiliary fuel injection setting means for operation of the fuel injection means; and an intake airflow retrieval means which determines the retrieved amount of intake airflow corresponding to the operating region from the data of intake airflow previously made based on the area of opening of a throttle valve and the engine velocity. The control region judgement means is adapted to compare the detected amount of intake airflow with the retrieved amount of intake airflow during the operating region for engine acceleration, to select the main fuel injection setting means for operation when the detected amount of intake airflow is less than or equal to the retrieved amount of intake airflow, and to select the auxiliary fuel injection setting means when the detected amount of intake airflow is larger than the retrieved amount of intake airflow.

• Assignee: Nissan Motor Co., Ltd., Isezaki
• Patent Number(s): US 4817572
• OSTI ID: 5891495
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
AIR FLOW
COMPUTERIZED CONTROL SYSTEMS
CONTROL SYSTEMS
DESIGN
ENGINES
FLUID FLOW
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
FUEL-AIR RATIO
GAS FLOW
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
OPERATION