Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1989-01-23
1990-06-12
Argenbright, Tony M.
Internal-combustion engines
Charge forming device
Fuel injection system
7386122, 123493, 123494, F02D 4118
Patent
active
049323822
ABSTRACT:
A fuel control system for an internal combustion engine for controlling fuel supply rate on the basis of the output signal of a vortex flowmeter having variable-frequency filter means, capable of accurately measuring intake air flow to control the fuel supply rate accurately avoiding the erroneous measurement of noises generated during the rapid deceleration of the engine in which the throttle valve is shut. The fuel supply system has operating mode detecting means for detecting the operating mode of the engine, and passband fixing means for fixing the passband of the variable-frequency filter means at a predetermined passband when the operating mode detecting means detects that the engine is in a predetermined deceleration mode. The passband of the variable-frequency filter means is fixed at the predetermined passband while the engine is in the predetermined deceleration mode to enable accurate control of fuel supply rate by eliminating noise signals which is generated during the predetermined deceleration mode and superposed on the operating mode detection signal. When the engine is accelerated during a time period subsequent to the end of the predetermined deceleration mode, the fixation of the passband of the variable-frequency filter means is cancelled.
REFERENCES:
patent: 3818877 (1974-06-01), Barrera et al.
patent: 3864972 (1975-02-01), Burgess et al.
Fujimoto Takanori
Hara Toshiro
Argenbright Tony M.
Mitsubishi Denki & Kabushiki Kaisha
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