Measuring and testing – Simulating operating condition – Marine
Patent
1995-03-23
1996-10-01
Chilcot, Richard
Measuring and testing
Simulating operating condition
Marine
123 4112, G01M 1500, F01P 702
Patent
active
055612431
ABSTRACT:
In apparatus and method for diagnosing radiator fan control system installed in a vehicular internal combustion engine, an engine coolant temperature Tw is detected and a failure in the radiator fan control system is determined when the detected engine coolant temperature Tw indicates a predetermined rise state and/or when a predetermined engine driving condition is detected, the predetermined engine driving condition being varied in correlation to a variation in an electrical load to the engine, and a variation width (drop width) in the detected engine driving condition is below a reference value during a switching of a rotation speed of a radiator fan by means of the radiator fan control system.
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Service Manual of a New Model of C34, (C34-1), "7-5 Radiator Fan Control System", pp. B-122, (Jan. 1993).
Chilcot Richard
McCall Eric S.
Unisia Jecs Corporation
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