Diagnosis apparatus and method of fuel pump for internal...

Details Diagnosis apparatus and method of fuel pump for internal... Diagnosis apparatus and method of fuel pump for internal...

2005-06-21

2005-06-21

McCall, Eric S. (Department: 2855)

Measuring and testing

Internal combustion engine or related engine system or...

Compression

Reexamination Certificate

active

06907775

ABSTRACT:
When a fuel pressure on the downstream side of a fuel pump for an internal combustion engine is less than a slice level, it is judged whether or not an applied voltage on a motor unit and/or the power consumption in the motor unit are normal. In the case where the motor unit is not failed, it is estimated that the pump unit is failed.

REFERENCES:
patent: 4061027 (1977-12-01), Emerson
patent: 4387589 (1983-06-01), Larson
patent: 4827897 (1989-05-01), Yamada et al.
patent: 5633457 (1997-05-01), Kilar et al.
patent: 5770796 (1998-06-01), Sakamoto et al.
patent: 63-052962 (1988-04-01), None

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