Emergency control device for fuel-dosing systems

Details Emergency control device for fuel-dosing systems Emergency control device for fuel-dosing systems

1983-10-14

1985-07-16

Moy, Magdalen Y. C.

Internal-combustion engines

Engine speed regulator

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

123198D, F02D 3100

Patent

active

045289522

ABSTRACT:
Disclosed is an emergency control device for fuel dosing systems of IC engines, particularly for fuel injection devices of a diesel engine. A conventional regulating path for the fuel pump, includes a series connection of a set of data sensors, a signal processing circuit for computing a regular control signal, and a fuel regulating device connected to the fuel pump and provided with a manually or automatically controlled switching device. An emergency control branch is connected between the switching device and the sensor to function in parallel with the regular regulating device. The emergency control branch includes a nominal value generator of a signal corresponding to a maximum manifold pressure and a manifold pressure regulator controlled by output from the nominal value transmitter, to apply, via the switching device, to the fuel pump a dosing signal which causes the manifold pressure not to exceed the preset maximum value. In a further elaboration the emergency control branch includes a minimum value selector cooperating, in addition to the manifold pressure regulator, with a current control unit indicative of the gas pedal position and with an overspeed safety circuit cooperating with a rotary speed sensor. A maximum value selector is connected between the switching device and the output of the minimum value selector and controls the dosing pump in response to an idling speed stabilizer.

REFERENCES:
patent: 3699935 (1972-10-01), Adler et al.
patent: 3834361 (1974-09-01), Keely
patent: 3911883 (1975-10-01), Williams et al.
patent: 4372266 (1983-02-01), Hiyama et al.
patent: 4414949 (1983-11-01), Honig et al.

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