Internal-combustion engines – Charge forming device – Supercharger
Patent
1997-11-18
1999-12-28
Kamen, Noah P.
Internal-combustion engines
Charge forming device
Supercharger
123 4129, 60599, F02B 3300
Patent
active
060067314
ABSTRACT:
A locomotive engine cooling system has a pair of radiator banks having substantially the same cooling capacity. The system has separate engine and aftercooler coolant loops and assigns one of the radiator banks exclusively to each of the loops, with the maximum cooling capacity being less than that required to absorb an engine heat load in a predetermined, warmed-up mode of operation but greater than that required to absorb an aftercooler heat load in the same predetermined, warmed-up mode of operation. To balance the system, a linking conduit directs a portion of the hot coolant exiting the engine to a conduit leading directly to the aftercooler radiator to supplement the maximum cooling capacity of the engine radiator with a predetermined portion of the maximum cooling capacity of the aftercooler radiator in absorbing the engine heat load. A return flow conduit from the aftercooler radiator to the engine may be a common coolant tank, a separate conduit or both. A valved conduit in parallel with the linking conduit selectively provides additional coolant flow from the engine to the aftercooler radiator to absorb additional heat from the engine for engine temperature limiting at higher loads and/or ambient temperatures. The arrangement simplifies connections to the radiators for reduced cost, improves cooling system efficiency, reduces thermal stresses in the radiators, and permits linking valve operation in a preferred closed condition in normal, warmed-up operation.
REFERENCES:
patent: 3397684 (1968-08-01), Scherenberg
patent: 4061187 (1977-12-01), Rajasekaran et al.
patent: 4961404 (1990-10-01), Itakura et al.
patent: 5353757 (1994-10-01), Susa et al.
patent: 5598705 (1997-02-01), Uzkan
Ellis Dean L.
General Motors Corporation
Kamen Noah P.
Sigler Robert M.
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