Fuel pump control apparatus

Details Fuel pump control apparatus Fuel pump control apparatus

1983-06-07

1985-04-02

Moy, Magdalen Y. C.

Internal-combustion engines

Engine speed regulator

Having condition responsive means with engine being part of...

123482, 123488, F02D 3100

Patent

active

045080771

ABSTRACT:
The output of a fuel pump of an internal combustion engine is controlled by the duty cycle of its power supply circuit, which is in turn controlled in accordance with engine and fuel conditions. Sensor signals indicative of the engine and fuel conditions are processed to derive a DC voltage level suitable to the conditions. The derived voltage and a triangular voltage signal of fixed frequency and amplitude are compared by a comparator which outputs a train of pulses. The frequency of the pulse train is that of the triangular wave and the duty cycle thereof is determined strictly by the derived voltage. The pulse train from the comparator is amplified to drive the fuel pump.
There may be many different kinds and combinations of engine and/or fuel condition sensors. In addition, sensor signal processing to derive the DC voltage level may take a number of different forms and may include feedback from the fuel pump power supply circuit in order to suppress transient fluctuations.

REFERENCES:
patent: 3643635 (1972-02-01), Milam
patent: 3822677 (1974-07-01), Reddy
patent: 4048964 (1977-09-01), Kissel
patent: 4117815 (1978-10-01), Ikeura
patent: 4134375 (1979-01-01), Koseki et al.
patent: 4173952 (1979-11-01), Asano
patent: 4372266 (1983-02-01), Hiyama et al.

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