Fuel control apparatus for a fuel injection system of an interna

Details Fuel control apparatus for a fuel injection system of an interna Fuel control apparatus for a fuel injection system of an interna

1987-05-07

1988-08-02

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Fuel injection system

123494, F02M 5100

Patent

active

047608293

ABSTRACT:
A fuel control apparatus for a fuel injection system of an internal combustion engine has an air flow sensor for sensing the air flow rate into the air intake pipe of the engine and producing an electrical output having a frequency which is proportional to the air flow rate, and a crank angle sensor for producing an electrical output pulse each time the crankshaft of the engine is at a prescribed crank angle. A load detector detects the number of output pulses from the air flow sensor between consecutive output pulses of the crank angle sensor, and an air flow rate calculator calculates the actual intake air flow rate into the cylinders of the engine based on the output of the load detector. A controller controls the supply of fuel to fuel injectors for the engine based on the output of the calculator. The load detector includes a frequency divider which performs frequency division of the output from the air flow sensor when the load exceeds a prescribed level.

REFERENCES:
patent: 4269157 (1981-05-01), Fujishiro
patent: 4455985 (1984-06-01), Asayama
patent: 4550705 (1985-11-01), Nagano et al.
patent: 4594987 (1986-06-01), Wataya et al.
patent: 4606318 (1986-08-01), Tsuchida et al.
patent: 4633838 (1987-01-01), Fukui
patent: 4671242 (1987-06-01), Akiyama et al.
patent: 4683539 (1987-07-01), Kanno et al.
patent: 4694806 (1987-09-01), Wataya et al.
patent: 4706634 (1987-11-01), Nishikawa et al.

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