Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1984-10-24
1985-04-09
Moy, Magdalen Y. C.
Internal-combustion engines
Charge forming device
Fuel injection system
123459, 123357, F02M 3900
Patent
active
045094870
ABSTRACT:
A fuel system for a multi-cylinder engine comprises a plurality of engine operated pumps supplying fuel to the injection nozzles respectively of an engine. Each pump has an electromagnetic valve which must be closed to cause delivery of fuel by the respective pumps. The supply of power to the windings of the valves is effected by a power module controlled by a distributor circuit which receives sequence signals to ensure that the valves are closed at the correct time and a fuel level signal to ensure that the valve is closed for the correct length of time. In order to ensure that the amount of fuel delivered through each nozzle is the same a sensor provides a pulse signal at each working stroke of the engine. The period between each signal is determined by a timer circuit and the average of a number of periods is obtained from an averaging circuit. The average period is compared with the actual value and any error is used in a compensating circuit 29 to adjust the time the respective valve is closed.
REFERENCES:
patent: 4064849 (1977-12-01), Latsch et al.
patent: 4153013 (1979-05-01), Bianchi et al.
patent: 4323042 (1982-04-01), Woodhouse et al.
patent: 4377998 (1983-03-01), Hartel et al.
patent: 4378775 (1983-04-01), Straubel et al.
patent: 4395987 (1983-08-01), Kobayashi et al.
SAE Technical Paper Series, Eisele, Electronic Control of Diesel Cars, 2/1980, FIG. 12.
Lucas Industries Public Limited Company
Moy Magdalen Y. C.
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