Apparatus for detecting a malfunction in a radiator fan system

Details Apparatus for detecting a malfunction in a radiator fan system Apparatus for detecting a malfunction in a radiator fan system

1996-09-03

1998-04-14

Kamen, Noah P.

Internal-combustion engines

Cooling

Indicators and safety devices

F01P 514

Patent

active

057380490

ABSTRACT:
A malfunction detecting apparatus of a radiator fan system includes a steady-state discrimination unit which detects whether an operating condition of an internal combustion engine is in a steady state. A temperature change measuring unit measures a change in a temperature of cooling water of the engine when the operating condition of the engine is detected to be in the steady state and a control signal to start rotation of a cooling fan of the radiator fan system is output. A malfunction detecting unit detects that a malfunction in the radiator fan system has occurred when the temperature change measured by the temperature change measuring unit is smaller than a reference value.

REFERENCES:
patent: 4580531 (1986-04-01), N'Guyen
patent: 5036803 (1991-08-01), Nolting et al.
patent: 5561243 (1996-10-01), Machida
Patent Abstracts of Japan, vol. 014, No. 243 (M-0977), May 23, 1990 & JP-A-02 064329 (NEC Corp), Mar. 5, 1990.

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