Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1981-12-31
1984-01-31
Lazarus, Ira S.
Internal-combustion engines
Charge forming device
Fuel injection system
123479, 123501, 123458, 417462, F02M 3900
Patent
active
044283466
ABSTRACT:
A control apparatus for an electrically controlled injection pump of a Diesel engine comprises a main controller for controlling valve opening durations of an injection quantity control solenoid valve and an injection timing control solenoid valve provided for the injection pump so that a desired quantity of fuel is supplied to the engine in an optimal injection timing and a sub-controller for controlling the injection pump in place of the main controller upon occurrence of failure of the latter. The sub-controller is constituted by an injection timing signal generator for preparing an injection timing control signal of a fixed duration applied to the timing control solenoid valve and an injection quantity signal generator for preparing an injection quantity control signal applied to the quantity control solenoid valve, which signal has a pulse width variable in dependence on a parameter representative of a desired operation state of the engine.
REFERENCES:
patent: 3506381 (1970-04-01), Kemp
patent: 3834361 (1974-09-01), Keely
patent: 3851635 (1974-12-01), Murtin et al.
patent: 4326672 (1982-04-01), Goloff
Hitachi , Ltd.
Lazarus Ira S.
Moy Magdalen
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