Methods of and apparatus for testing internal combustion engines by monitoring the cooling systems thereof
An apparatus is described for testing the condition of liquid cooling systems of internal combustion engines, wherein a thermostat is disposed in coolant of a cooling system between a radiator and an engine. The device comprises: a heat sensor for placement in the coolant between the radiator and thermostat; time counting means for counting a preselected time interval selected to correspond to the time interval in which the coolant should reach a first preselected heat level; means connected to the time counting means for starting operation thereof upon commencing testing of the cooling system; an under-range switch means connected to the heat sensor for detecting when the cooling system reaches the first preselected temperature; a first indicating means for indicating that the coolant has reached the first preselected heat level; relay means connected to the under-range switch, the time counting means and the first indicating means for interrupting operation of the first indicating means; second indicating means for providing a defect signal when the time counting means signals the end of the first preselected time interval; first connecting means for connecting the second indicating means to the time first connecting means; outer-range switch means connected to the heat sensor for detecting when the coolant reaches at least one upper heat level limit higher than the first preselected temperature; at least one additional indicating means for indicating that the upper temperature limit has been reached, second connecting means for connecting the outer range switch means to the additional indicating means.
- Assignee:
- Autotec International, Inc., St. Albans, NY
- Patent Number(s):
- US 4702620
- OSTI ID:
- 5850488
- Resource Relation:
- Patent File Date: Filed date 29 Apr 1986
- Country of Publication:
- United States
- Language:
- English
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