Fail-safe coolant thermostat system for an internal combustion engine

Patent · Tue Jul 24 04:00:00 EDT 1990

OSTI ID:6553967

Shelton, V E

This patent describes an improvement in a device for controlling the flow of cooling fluid between a fluid-cooled engine and a radiator, wherein a primary passage is provided with a thermostat that normally controls the flow of cooling fluid between the engine and the radiator. It comprises: a bypass passage connected in parallel with the primary passage and thermostat; a control valve contained within the bypass passage, the valve comprising a solenoid operated cup-shaped valve body and means for continually urging open the valve toward an open position; and means for de-energizing the solenoid for positioning the control valve in an open condition when either the engine is not operating or the cooling fluid temperature exceeds a positioning the control valve in a closed condition when the engine is operating and the cooling fluid temperature is below the predetermined level.

• Assignee: NOV; NOV-90-034088; EDB-90-155622
• Patent Number(s): A; US 4942849
• Application Number: PPN: US s 7-334580
• OSTI ID: 6553967
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
CONTROL
CONTROL EQUIPMENT
COOLANTS
COOLING SYSTEMS
ENERGY SYSTEMS
ENGINES
EQUIPMENT
FLOW REGULATORS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
RELIEF VALVES
TEMPERATURE CONTROL
THERMOSTATS
VALVES