Diagnostic system for detecting fault in fuel system of engine h

Details Diagnostic system for detecting fault in fuel system of engine h Diagnostic system for detecting fault in fuel system of engine h

1982-06-15

1984-03-20

Myracle, Jerry W.

Measuring and testing

Internal combustion engine or related engine system or...

Compression

G01M 1500

Patent

active

044373422

ABSTRACT:
A fault diagnostic system is arranged to detect faults in a fuel system of an engine with an electronic fuel injection system by monitoring the quantities of fuel consumed during a time interval. To do this, the consumption quantity of fuel is determined from a decrease of the residual quantity of fuel remaining in a fuel tank which is detected by a fuel gauge. On the other hand, the fuel injection quantity is determined independently by summing the length of the injector open time of each injection. Then, the fuel consumption quantity and the fuel injection quantity during the same time interval are compared. If the difference therebetween is larger than a predetermined permissible range, it is decided that there is some fault somewhere in the fuel system, and an indication signals is produced.

REFERENCES:
patent: 4002062 (1977-01-01), Kuno et al.
patent: 4253330 (1981-03-01), Kato

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