Measuring and testing – Vehicle chassis – Steering
Patent
1996-09-27
1998-09-08
Dombroske, George M.
Measuring and testing
Vehicle chassis
Steering
731173, 7320419, 7320423, 123196AB, 123196S, G01M 1500
Patent
active
058047123
ABSTRACT:
An oil flow sensor and circuit to indicate the presence of oil flow in a multi-cylinder internal combustion engine. The oil sensor includes a heating element positioned within the oil line directly in the oil flow path. Positioned upstream and downstream from the heating element are an upstream heat sensor and a downstream heat sensor. Each of the heat sensors is a negative temperature coefficient resistive device, such that the resistance of the heat sensor varies depending upon oil temperature at the sensor. The output of both the upstream and downstream sensor is coupled to a comparator. The comparator compares the value of the signals from the heat sensors and triggers a switching circuit when the temperature at the sensors approach one another, thus detecting that there is not adequate oil flow to the engine. The switching circuit is connected to a signaling device that indicates whether oil flow to the engine is adequate.
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Brunswick Corporation
Dombroske George M.
McCall Eric S.
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