Method and device for controlling energization of high pressure

Details Method and device for controlling energization of high pressure Method and device for controlling energization of high pressure

1986-03-04

1988-02-23

Miller, Carl Stuart

Internal-combustion engines

Charge forming device

With fuel pump

123458, 123198DB, F02M 3900

Patent

active

047263458

ABSTRACT:
In controlling a time period of energization of a high pressure electromagnetic valve (50) in accordance with a target value of a fuel injection quantity determined from at least an engine speed (Ne) and an engine load, when a target indicated value (theta) of the time period of energization determined from at least the engine speed and the engine load is lower than a zero indicated value (theta.sub.0) of the time period of energization when the fuel injection quantity becomes zero, which is determined from the engine speed, the energization of the high pressure electromagnetic valve is cut off. Therefore, the duty cycle of the high pressure electromagnetic valve is decreased thereby increasing the reliability of the valve. In addition, fuel is reliably cut off when the fuel injection quantity is 0 mm.sup.3 /st thus avoiding fuel leakage and preventing the generation of white exhaust smoke. Fuel economy can therefore be improved.

REFERENCES:
patent: 4395987 (1983-08-01), Kobayashi
patent: 4480619 (1984-11-01), Igashira et al.
patent: 4505240 (1985-03-01), Shinoda
patent: 4519353 (1985-05-01), Ito
patent: 4546749 (1985-10-01), Igashira
patent: 4562810 (1986-01-01), Miyaki
patent: 4574756 (1986-03-01), Ito
patent: 4602600 (1986-07-01), Akatsuka

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