Internal-combustion engines – Cooling – Interrelated coolant flow and throttle control
Patent
1985-08-05
1986-11-04
Cuchlinski, Jr., William A.
Internal-combustion engines
Cooling
Interrelated coolant flow and throttle control
123 4129, 123 4131, 123 4133, F01P 312, F01P 510
Patent
active
046205098
ABSTRACT:
A cooling system for an internal combustion engine is provided wherein coolant subsequent to flowing through the engine is selectively directed through one of two circuits or simultaneously through both circuits dependent upon the temperature of the coolant at predetermined locations within the system. One of the circuits includes a thermostatically controlled primary valve downstream of the engine unit and having an inlet port communicating therewith; a first bypass line having an upstream end connected to one outlet port of said valve; a radiator with a common inlet header and an outlet header with segregated segments, the inlet header being connected to a second outlet port of the valve; and an aftercooler downstream of the radiator and having an inlet side communicating with one segment of the radiator outlet header and a downstream end of the first bypass line. The aftercooler has an outlet side communicating with an intake side of a coolant pump. The second circuit includes a second bypass line communicating at an upstream end with the inlet port of the primary valve and having a downstream end connected to an inlet port of a thermostatically controlled secondary valve. The secondary valve has a second inlet port connected to a second segment of the radiator outlet header and an outlet port communicating with the pump intake side. The coolant flow rate through the first circuit being substantially less than through the second circuit.
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Cuchlinski Jr. William A.
Cummins Engine Company, Inc.
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