Fuel-metering system having a redundant control arrangement

Details Fuel-metering system having a redundant control arrangement Fuel-metering system having a redundant control arrangement

1990-04-30

1991-02-05

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Fuel injection system

123359, F02D 4122

Patent

active

049895699

ABSTRACT:
A fuel-metering system having a redundant control arrangement includes a main controller 12, an auxiliary controller 17, a first microprocessor 10, a second microprocessor 11, a switch-over unit 14, an actuator 15 and a fuel-metering unit 16. The second microprocessor emits a switch-over signal to the switch-over unit in the start phase of the internal combustion engine. The switch-over unit then supplies the actuator 15 with the actuator signal from the auxiliary control loop. A determination is made as to whether the actuator has reached the pregiven desired value. If this is indeed the case, then an indication is provided that the auxiliary controller and the switch-over unit are operating properly. If this is not the case, then the assumption can be made that the auxiliary controller or the switch-over unit is defective. In this case, a fault indication is provided.

REFERENCES:
patent: 3834361 (1974-09-01), Keely
patent: 4414949 (1983-11-01), Honig et al.
patent: 4425889 (1984-01-01), Hachitani et al.
patent: 4748566 (1988-05-01), Sasaki et al.
patent: 4791900 (1988-12-01), Buck et al.

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