Internal-combustion engines – Cooling – Interrelated coolant flow and throttle control
Patent
1993-09-29
1994-08-16
Kamen, Noah P.
Internal-combustion engines
Cooling
Interrelated coolant flow and throttle control
123 4129, F01P 714
Patent
active
053377044
ABSTRACT:
An improved cooling system for an internal combustion engine in an automotive vehicle which utilizes recirculating liquid coolant and provides an initial engine warm-up flow circuit extending: from a coolant pump, through cooling passages in the cylinder head, through a heat exchanger used to warm a passenger compartment, and back to the pump whereby a temperature responsive flow control valve or thermostat prohibits a flow of coolant from the cylinder head to cooling passages in the engine block which provides adequate cooling of the upper surfaces of the combustion chamber which are formed by the cylinder head while promoting a relatively rapid heating of the surfaces of the engine cylinders formed by the block. After the warm-up period, the thermostat opens to permit coolant flow into a down-flow passage between the cylinder head coolant passages and the engine block coolant passages resulting in a normal engine cooling circuit extending: from the coolant pump, through the cylinder head cooling passages, then through the engine block cooling passages, through a vehicle radiator, and back to the coolant pump. The improved cooling system actively cools the upper surfaces of the combustion chamber formed by the cylinder head both during an engine warm-up period and during normal engine operation which promotes complete combustion of the fuel and inhibits knock and pre-ignition.
REFERENCES:
patent: 3981279 (1976-09-01), Bubniak et al.
patent: 4212270 (1980-07-01), Nakanishi et al.
patent: 4423705 (1984-01-01), Morita et al.
S.A.E. C427/84, "A study on dual circuit cooling for higher compression ratio", pp. 151-157, 1984.
S.A.E. C443/84. "Torque characteristics and fuel efficiency of various gasoline engine concepts", pp. 41-46, 1984.
Chrysler Corporation
Kamen Noah P.
MacLean, Jr. Kenneth H.
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